E-print Network

Sample records for a-1 polymer chemistry

  1. Principles of polymer chemistry

    CERN Preprints

    Ravve, A

    2012-01-01

    New material on the chemistry of polymeric materials for special applications. These subjects are currently of considerable interest in industry and academia Only Polymer textbook that combines Organic and Physical Chemistry. Thus, for instance, in each chapter that deals with polymer preparations, both the kinetics and the thermodynamics of the reactions are discussed All figures are updated in this edition Physical properties of polymers are expanded and placed into a separate chapter and include such subjects as elasticity and rheology of polymers as well as a thorough discussion of the

  2. Effect of polymer chemistry on globular protein–polymer block copolymer self-assembly

    MIT - DSpace

    Chang, Dongsook

    Bioconjugates of the model red fluorescent protein mCherry and synthetic polymer blocks with different hydrogen bonding functionalities show that the chemistry of the polymer block has a large effect on both ordering ...

  3. STRESS-DENSITY VARIATIONS IN ALUMINA SEDIMENTS: EFFECTS OF POLYMER CHEMISTRY

    Materials Science Websites

    Aksay, Ilhan A.

    151 STRESS-DENSITY VARIATIONS IN ALUMINA SEDIMENTS: EFFECTS OF POLYMER CHEMISTRY C. H. SCHILLING modification of interparticle forces by changing the chemistry of surface-adsorbed polymers or ions to the low rotational energy of the Si-O-Si bonds comprising the polymer backbone. These inorganic polymers

  4. Designing phase selective soluble polymers for applications in organic chemistry 

    Texas A&M University - TxSpace

    Li, Chunmei

    2004-09-30

    Soluble polymers as supports are gaining more attention now. Developing new polymers, new reagents and catalysts, new separation systems are thus of great interest as these sorts of materials' applications in synthesis and catalysis increase...

  5. Design of chemistry and morphology of polymer filtration membranes

    MIT - DSpace

    Akthakul, Ariya, 1973-

    2003-01-01

    To improve membrane materials in water filtration, which currently display broad pore size distribution, hydrophobic chemistry, and fouling behavior, a novel design of chemistry and morphology of membranes is employed. ...

  6. Department of Polymer Science and Engineering College of Chemistry and Molecular Engineering,

    Chemistry Websites

    Wan, Xin-hua

    Min Luo Postdoctor Department of Polymer Science and Engineering College of Chemistry and Molecular University of Science and Technology (HUST) China PUBLICATIONS [1] Min Luo, Qun Wang, Zhi Yuan Wang, 13, 4092-4095. [2] Min Luo, Hooman Shadnia, Gang Qian, Xiaobo Du, Dengbin Yu, Dongge Ma, James S

  7. CHEM 6755: Theoretical Chemistry of Polymers Room: Molecular Sciences & Engineering Building (MoSE) G021

    Chemistry Websites

    Sherrill, David

    Thermodynamics and Kinetics," and CHEM 6751 is "Physical Chemistry of Polymer Solutions." II. TextBooks, 1996). Book chapters from these books will be referred to below as SM and PP, respectively. The text: The term exams on October 12th and December 12th will be closed book and closed notes. But you

  8. Chemistry (Freeman, New York, 1980), chaps. 18 9. M. Doi and S. F. Edwards, The Theory ofPolymer

    Biology and Medicine Websites

    Ahissar, Ehud

    Chemistry (Freeman, New York, 1980), chaps. 18 and 19. 9. M. Doi and S. F. Edwards, The Theory ofPolymer) [digoxigenin-labeled probe detected with sheep antidigoxigenin and FITC-conjugated donkey an- ti. Hahnfeldt for discussions on the applica- tions of the polymer model, and H. F. Massa, R. Esposito, S

  9. ESR under pressure on polymer phase A1C60 (A=Rb, Cs) H. Sakamotoa,*

    Physics Websites

    Mizoguchi, Kenji

    ESR under pressure on polymer phase A1C60 (A=Rb, Cs) H. Sakamotoa,* , S. Kobayashia , K. Mizoguchia-0012, Japan Abstract Electron spin resonance (ESR) studies under hydrostatic pressure were performed by the ESR intensity. On the basis of these data, together with the electrical resistivity on a single

  10. Bounds for scaling exponents for a 1+1 dimensional directed polymer in a Brownian environment

    Mathematical Physics (arXiv)

    Timo Seppäläinen; Benedek Valkó

    2010-07-01

    We study the scaling exponents of a 1+1-dimensional directed polymer in a Brownian random environment introduced by O'Connell and Yor. For a version of the model with boundary conditions that are stationary in a space-time sense we identify the exact values of the exponents. For the version without the boundary conditions we get the conjectured upper bounds on the exponents.

  11. 6751 Physical Chemistry of Polymer Solutions (3-0-3) (45 hrs) Prerequisites: Consent of Department

    Chemistry Websites

    Sherrill, David

    for such measurements. 4. Dilute polymer solutions: viscosity, light scattering, and colligative properties. 5. Concentrated solutions, and melts. 7. Statistical theories of viscosity and diffusion in polymers. 8

  12. Outline Introduction Model and Results Burke property Variance identity Sketch of proof for upper bound Polymer in a Browni Scaling exponents for a 1+1 dimensional directed

    Mathematics Websites

    Seppäläinen, Timo

    bound Polymer in a Browni Scaling exponents for a 1+1 dimensional directed polymer Timo Sepp¨al¨ainen Department of Mathematics University of Wisconsin-Madison 2010 Scaling for a polymer 1/30 #12;Outline Introduction Model and Results Burke property Variance identity Sketch of proof for upper bound Polymer

  13. Chemistry directed assembly of multilayered polymer thin films and colloidal particles

    MIT - DSpace

    Jiang, Xueping, 1971-

    2002-01-01

    In this thesis, multilayered polymer thin films have been directed to different regions of a surface based on both electrostatic and secondary interactions between the polymer and the surface. This concept of adsorption ...

  14. Polymer Science and Engineering Strategic Planning April 2015

    Environmental Sciences and Ecology Websites

    Schweik, Charles M.

    's top academic centers in the field of polymers. Bridging chemistry, physics between polymer chemistry (making new polymers and polymer materials), polymer physics (understanding and measuring the properties of polymers and polymeric

  15. THE SCHOOL OF CHEMISTRY AND BIOCHEMISTRY GEORGIA INSTITUTE OF TECHNOLOGY

    Chemistry Websites

    Sherrill, David

    THE SCHOOL OF CHEMISTRY AND BIOCHEMISTRY GEORGIA INSTITUTE OF TECHNOLOGY GRADUATE STUDENT HANDBOOK PROGRAM OF STUDY 5.18. BIOCHEMISTRY PROGRAM OF STUDY 5.19. POLYMER CHEMISTRY PROGRAM OF STUDY 5.20. PAPER: REQUIRED FORMS A.1. Research Advisor Selection form (Chemistry and Biochemistry) A.2 Completion of Data

  16. Systematic coarse-graining of the dynamics of entangled polymer melts: the road from chemistry to rheology

    Condensed Matter (arXiv)

    J. T. Padding; W. J. Briels

    2011-03-29

    For optimal processing and design of entangled polymeric materials it is important to establish a rigorous link between the detailed molecular composition of the polymer and the viscoelastic properties of the macroscopic melt. We review current and past computer simulation techniques and critically assess their ability to provide such a link between chemistry and rheology. We distinguish between two classes of coarse-graining levels, which we term coarse-grained molecular dynamics (CGMD) and coarse-grained stochastic dynamics (CGSD). In CGMD the coarse-grained beads are still relatively hard, thus automatically preventing bond crossing. This also implies an upper limit on the number of atoms that can be lumped together and therefore on the longest chain lengths that can be studied. To reach a higher degree of coarse-graining, in CGSD many more atoms are lumped together, leading to relatively soft beads. In that case friction and stochastic forces dominate the interactions, and actions must be undertaken to prevent bond crossing. We also review alternative methods that make use of the tube model of polymer dynamics, by obtaining the entanglement characteristics through a primitive path analysis and by simulation of a primitive chain network. We finally review super-coarse-grained methods in which an entire polymer is represented by a single particle, and comment on ways to include memory effects and transient forces.

  17. Coordination Chemistry Reviews, 128 (1993) 293-322 293 One-dimensional coordination polymers: Applications to

    Chemistry Websites

    Suslick, Kenneth S.

    1993-01-01

    : Applications to material science* Chin-Ti Chen and Kenneth S. Suslick SchoolofChemical Sciences, University polymers ...................... 298 4. Non-linear optical materials ............................. 306 5. Ferroelectric materials ................................. 312 Acknowledgments

  18. A1 MCKINLEY s SRIDHAR Appendix A APPENDIX A: Survey of Existing Filament Stretching Experiments in Polymer Solutions

    Engineering Websites

    the experimental conditions of all existing published filament stretching data for polymer solutions and melts. The symbols and relevant citations are summarized in Table A.1. Also, some data points and symbols listed and the molecular motion becomes dominated by curvilinear diffusion or reptation. In the melt, the critical

  19. Bandwidth Studies on a 1.4 m Long Multimode Polymer Spiral Waveguide

    University of Cambridge - Dspace

    Chen, Jian; Bamiedakis, Nikos; Penty, Richard V.; White, Ian H.

    2014-08-19

    to this issue owing to their larger bandwidth, immunity to electromagnetic interference and compactness. Polymer multimode waveguides are potential candidates for use in on-board optical interconnections owing to favourable material properties which show low...

  20. Chemflex Overview: Common Chemistry core

    Materials Science Websites

    Gilchrist, James F.

    110,111,112,113 8 Organic chemistry CHM 332 3 Analytical chemistry CHM 201*** 2 Technical writing CHM 393 3 Physical polymer science CHM 394 3 Organic polymer science BS Pharmaceutical Chemistry CourseChemflex Overview: Common Chemistry core CHM 40, 41 (or CHM 30, 31) 8 Introductory chemistry CHM

  1. Graduate School of Advanced Science and Engineering Department of Applied Chemistry

    Mathematics Websites

    Kaji, Hajime

    01 Inorganic solid state chemistry and inorganic synthetic chemistry. Inorganic-organic as a branch of inorganic polymer chemistry. L02 Studies on functional polymers. Organic polymers Department of Applied Chemistry Research Area Research Instruction Application Code Name of Supervisor

  2. BOMC LabBOMC Lab (Bio(Bio--Organic Materials Chemistry)Organic Materials Chemistry)

    Materials Science Websites

    Jonas, Ulrich - Institute of Electronic Structure and Laser, Foundation for Research and Technology

    BOMC LabBOMC Lab (Bio(Bio--Organic Materials Chemistry)Organic Materials Chemistry) FORTHFORTH of Biology and Chemistryat the Interface of Biology and Chemistry #12;OrganicOrganic PolymerPolymer SystemsPolymer Hybrid Systems -- ChemistryChemistry #12;BiohybridBiohybrid NanoAssembliesNanoAssemblies from Design

  3. Chemistry 1010 -090 (Online) Chemistry, Humanity, and Environment

    Chemistry Websites

    Simons, Jack

    of topics, such as acid/base, oxidation/reduction, organic chemistry, and polymers, completes the discussionChemistry 1010 -090 (Online) Chemistry, Humanity, and Environment 1. Course Content The Online version of Chemistry 1010 (1010-090) supports the aims of the University of Utah General Education Mission

  4. Department of Chemistry "Some Interesting things about the

    Materials Science Websites

    Mark, James E.

    Department of Chemistry "Some Interesting things about the Polysiloxanes" Presented by: Professor James E. Mark University of Cincinnati Departmental Colloquium Sponsored by the Chemistry Graduate, Department of Chemistry and the Polymer Research Center, The University of Cincinnati, Cincinnati, OH 45221

  5. 3. Advanced Polymer Molecular Science

    Computer Technologies and Information Sciences Websites

    Duh, Kevin

    . The Frontline of Fine Synthetic Technology Synthetic Organic Chemistry O O HO O OH H ON H O O O OH O O O O. Organic Semi- conducting Polymer Creation through Precursor Methods Photofunctional Organic Chemistry and Biophysics 10. Bio-functional Control and Nano Science Achieved through Supramolecular Chemistry

  6. CHEMISTRY 521 GRADUATE PHYSICAL CHEMISTRY

    Chemistry Websites

    Findley, Gary L.

    CHEMISTRY 521 GRADUATE PHYSICAL CHEMISTRY Fall Term, 1999 INSTRUCTOR INFORMATION Instructor: Dr in Physical Chemistry. Goals/ Objectives: Introduction to quantum mechanics. Topics covered include (second semester of undergraduate Physical Chemistry) or equivalent. Text: Quantum Chemistry, Ira N

  7. Department of Chemistry & Biochemistry UCLA Chemistry, Biochemistry & Chemistry Material Science

    Materials Science Websites

    Levine, Alex J.

    ...............................................................................................................................15 Chemistry-Materials Science Organic ConcentrationDepartment of Chemistry & Biochemistry UCLA Chemistry, Biochemistry & Chemistry Material Science ...........................................................................................................................................4 Chemistry & Biochemistry Undergraduate Office

  8. In recognition of the many contributions of James E. Mark to polymer science and technology

    Materials Science Websites

    Mark, James E.

    simulations. Professor Mark has lectured extensively on polymer chemistry, has been an organizer of rubber elasticity and silicone chemistry has been recognized by many major national awards from in 1994, the Flory Polymer Education Award (ACS Division of Polymer Chemistry) in 2000, and the Kipping

  9. Optical properties of lissamine functionalized Nd3 in polymer waveguides and solution

    Physics Websites

    Polman, Albert

    Optical properties of lissamine functionalized Nd3 complexes in polymer waveguides and solution L, 7500 AE Enschede, The Netherlands c Philips Research, Department of Polymers and Organic Chemistry in deuterated dimethyl- sulfoxide solutions and partially ¯uorinated planar polymer waveguides. Optical

  10. Conjugated polymer nanoparticles Donus Tuncel*ac

    Materials Science Websites

    Demir, Hilmi Volkan

    combines synthetic organic, supramolecular and polymer chemistry to prepare functional materials. This feature article a Deparment of Chemistry, Bilkent University, Bilkent, Ankara, Turkey 06800. E in Chemistry from University of North London. She went on to study for her PhD at Cambridge University

  11. Chemistry World Twist and shine

    Materials Science Websites

    Rogers, John A.

    Chemistry World Twist and shine 17 October 2010 An international team of researchers has developed them to poly(dimethylsiloxane) (PDMS), a low cost, flexible biocompatible polymer. Arrays of LEDS a lot of this work, but it's going to have an enormous impact.' Rogers has recently launched a spin out

  12. Biochemistry chemistry &

    Chemistry Websites

    Morgan, Stephen L.

    Biochemistry chemistry & A n A ly t i c A l B i o l o g i c A l i n o r g A n i c o r g A n i c P h of South Carolina..........................1 Department of Chemistry and Biochemistry....2 The Graduate Program in Chemistry and Biochemistry.........................................................3 Ph

  13. Modelling semiflexible polymers: shape analysis, buckling instabilities, and force generation

    Physics Websites

    Kierfeld, Jan

    by bending energy rather than entropy. Polymer chemistry and biology provide a number of examples examples are supramolecular assemblies with a rather large diameter which gives rise to strong interactions with a mechanical persistence length of 50 nm.6 Polymer chemistry provides various examples of synthetic

  14. Nanostructured polymer composites for electronics and sensor applications

    Engineering Websites

    Fisher, Frank

    for development of advanced all- plastic electronic devices, organic photovoltaics and sensors. Valery Bliznyuk received a Ph.D. degree in Polymer Science from the Institute of Macromolecular Chemistry of National Academy of Sciences, Kiev, Ukraine (1985), and Doctor of Science (D.Sc.) degree in Polymer Chemistry

  15. SAMPLE ACADEMIC PROGRAMS FOR CHEMISTRY MAJORS Chemistry has been aptly called the "central science" because so many other scientific and

    Engineering Websites

    Chen, Zhongping

    wishing to emphasize chemical physics, computational or theoretical chemistry, chemical synthesis and reactivity, or materials or polymer science in their undergraduate programs are also available All sample Chemistry (131A-B- C) and Inorganic Chemistry (107, 107L). In other respects the sample programs differ from

  16. Departmentof The Department of Chemistry at the University of Michigan has a storied

    Physics Websites

    Monnier, John D.

    Departmentof Chemistry the power The Department of Chemistry at the University of Michigan has a storied history of landmark research and innovation. From the discovery of organic free radicals, which opened up major fields of research ranging from physical chemistry to polymer chemistry to biology

  17. Communications Two Luminescent Coordination Polymers

    Materials Science Websites

    zur Loye, Hans-Conrad

    -Conrad zur Loye* Department of Chemistry and Biochemistry, University of South Carolina, Columbia, South in optoelectronic materials chem- istry has been the development of diverse types of fluorescent organic materials for use in electrolumines- cent devices.1 Aromatic organic molecules, conjugated organic polymers

  18. Faculty of Engineering, LTH General syllabus for third-cycle studies in Polymer Technology

    Computer Technologies and Information Sciences Websites

    Faculty of Engineering, LTH General syllabus for third-cycle studies in Polymer Technology TEKPOF00 amended 16 June 2014 (reg. no U 2014/479). 1. Subject description Polymer Technology is an interdisciplinary subject including the chemistry and physics of polymers, polymers from renewable resources

  19. Nanoscience and chemistry Nanoscience, Nanotechnology, and Chemistry**

    Physics Websites

    Falvo, Michael

    Nanoscience and chemistry Nanoscience, Nanotechnology, and Chemistry** George M. Whitesides* Keywords: · chemistry · devices · nanoscience · nanotechnology What is Nanoscience? "Nanoscience- est dimensions ranging from a few nanometers to less than 100 nanometers.[1­3] In chemistry

  20. Theoretical Study of Intermolecular Chain Transfer to Polymer Reactions of Alkyl Acrylates

    Materials Science Websites

    Rappe, Andrew M.

    The Makineni Theoretical Laboratories, Department of Chemistry, University of Pennsylvania, PhiladelphiaTheoretical Study of Intermolecular Chain Transfer to Polymer Reactions of Alkyl Acrylates Nazanin

  1. Organophosphorus chemistry

    University of Kansas - KU ScholarWorks

    Hanson, Paul R.

    2014-09-04

    , and reproduction in any medium, provided the original work is properly cited. The license is subject to the Beilstein Journal of Organic Chemistry terms and conditions: (http://www.beilstein-journals.org/bjoc) The definitive version of this article... stream_size 3897 stream_content_type text/plain stream_name Hanson_Organophosphorus_chemistry.pdf.txt stream_source_info Hanson_Organophosphorus_chemistry.pdf.txt Content-Encoding UTF-8 Content-Type text/plain; charset=UTF-8...

  2. Quantum chemistry

    CERN Preprints

    Lowe, John P

    1993-01-01

    Praised for its appealing writing style and clear pedagogy, Lowe's Quantum Chemistry is now available in its Second Edition as a text for senior undergraduate- and graduate-level chemistry students. The book assumes little mathematical or physical sophistication and emphasizes an understanding of the techniques and results of quantum chemistry, thus enabling students to comprehend much of the current chemical literature in which quantum chemical methods or concepts are used as tools. The book begins with a six-chapter introduction of standard one-dimensional systems, the hydrogen atom,

  3. Columbia University Department of Chemistry Fall 2012 Colloquia

    Chemistry Websites

    Turro, Nicholas J.

    :00 "Synthesis at the Interface of Chemistry and Biology: From Stem Cells to the Genetic Code" Peter Schultz Nanostructures in Ionic Liquids: New Opportunities in Polymer Science and Engineering" Timothy Lodge, University

  4. THE JOURNAL OF CHEMICAL PHYSICS 136, 214901 (2012) Adsorption-driven translocation of polymer chain into nanopores

    Engineering Websites

    Muzzio, Fernando J.

    2012-01-01

    THE JOURNAL OF CHEMICAL PHYSICS 136, 214901 (2012) Adsorption-driven translocation of polymer chain National Laboratory for Molecular Sciences, Department of Polymer Science and Engineering and Key Laboratory of Polymer Chemistry and Physics of Ministry of Education, College of Chemistry and Molecular

  5. Chemistry 442: Aquatic Chemistry Fall Semester 2015

    Chemistry Websites

    Chu, Xi

    Chemistry 442: Aquatic Chemistry Fall Semester 2015 Professor: Prof. DeGrandpre (Mike), Office: Chemistry 318 (enter through lab, 317), Office hours: drop by or arrange with me, email: michael in environmental chemistry, aquatic chemistry and applied physical chemistry. From this course you will gain an in

  6. CHEMISTRY, B.S. CHEMISTRY (CHEM)

    Mathematics Websites

    Hamburger, Peter

    General Chemistry ______ 4 CHM 24100 Intro Inorganic Chemistry ______ 3 CHM 26100 Organic Chemistry ______ 2 CHM 26500 Organic Chemistry Lab ______ 3 CHM 26200 Organic Chemistry ______ 2 CHM 26600 Organic Course No. Course Title Pre-Reqs Crs. Course No. Course Title Pre-Reqs Crs. CHM 26100 Organic Chemistry

  7. e-Polymers 2008, no. 054 http://www.e-polymers.org

    Materials Science Websites

    North Texas, University of

    , polymer chemistry, organic and inorganic chemistry, and physics. The preparation, characterization materials stronger is anything but new [1, 2]. For the past dec- ade, organic + inorganic composites, and applications of organic-inorganic hybrid materials have become a fast expanding area of research in materials

  8. 49 2012-13SuggestedCoursePlan CHEMICAL (POLYMERS/MATERIALS)

    Materials Science Websites

    Zhou, Chongwu

    CHE 405 MATH245or ISE 460 or BUAD 301 3 POLYMER / MATERIALS SCI. ELECTIVE 3 CHEMISTRY ELECTIVE 4 CHE I MATH 126: Calculus II MATH 226: Calculus III MATH 245: Mathematics of Phys. and Engr. PHYSICS (8: Organic Chemistry CHEM 430A: Physical Chemistry I CHEMISTRY ELECTIVE: (CHEM 322bL or 430b) GENERAL

  9. Did you know that plastics can conduct electricity? Professors Alan Heeger, Alan Mac Diarmid and Hideki Shirakawa reveived the 2000 Nobel Prize in Chemistry for the discovery and development of conductive polymers.

    Chemistry Websites

    of conductive polymers. Upon doping, an insulating plastic can become conducting such as a metal and be used r i z a t i o n Improvement of the thermal stability upon hydrogenation of the ROMP polymer N OO CH3

  10. 2012WEEKLY BULLETIN DEPARTMENT OF CHEMISTRY, NORTHWESTERN UNIVERSITY

    Renewable Energy Websites

    to Self- Healing Polymers" Department Calendar can be found at http://www.chemistry.northwestern.edu/events Events For other upcoming events, please visit http://www.chemistry.northwestern.edu/events for future research and how those plans might be realized in a Stanford setting, as well as to submit similar

  11. CHEMISTRY 108-01 GENERAL CHEMISTRY II

    Chemistry Websites

    Findley, Gary L.

    CHEMISTRY 108-01 GENERAL CHEMISTRY II Fall Term, 2002 10:00 - 10:50 am, MWThF CNSB 243 INSTRUCTOR-1835 Email: findley@ulm.edu URL: www.ulm.edu/chemistry/findley COURSE Content: Principles of modern chemistry. Goals/ Objectives: CHEM 108 is the second semester of a fundamental introduction to chemistry

  12. Chem 681 Quantum Chemistry Chemistry 681

    Chemistry Websites

    Chem 681 Quantum Chemistry Chemistry 681 Introduction to Quantum Chemistry Fall 2003 BIBLIOGRAPHY]. The physical chemistry text by McQuarrie & Simon [3] (used in Chem 390) also has relevant material. The thirdQuarrie, Quantum Chemistry (University Science Books). [2] P.W. Atkins, Molecular Quantum Mechanics (Oxford). [3

  13. FACULTY OF CHEMISTRY AND PHARMACY CHEMISTRY & PHARMACY

    Environmental Sciences and Ecology Websites

    Schubart, Christoph

    FACULTY OF CHEMISTRY AND PHARMACY Faculty of CHEMISTRY & PHARMACY People and their research #12;PD Dr. Denis Usvyat Theoretical Chemistry PD Dr. Sabine Amslinger Organic Chemistry Dr. Ferdinand Brandl Pharmaceutical Technology Dr. Robert Kretschmer Inorganic Chemistry Dr. Christoph Dorn Clinical Pharmacy Our

  14. Fibers and Polymers 2003, Vol.4, No.1, 1-7 Aspects of Electrohydrodynamic Instabilities at Polymer Interfaces

    Materials Science Websites

    Lin, Zhiqun

    interfacial tension, which is given by the product of the interfacial energy and the interface area, Universitaet Konstanz, Germany 2 Department of Polymer Chemistry, University of Groningen, The Netherlands

  15. 54 IEEE PHOTONICS TECHNOLOGY LETTERS, VOL. 11, NO. 1, JANUARY 1999 High-Frequency Polymer Modulators with

    Materials Science Websites

    , Fellow, IEEE, and Larry R. Dalton Abstract-- Ultrahigh-speed integrated electrooptic polymer phase. Dalton are with the Department of Electrical Engineering and Chemistry, University of Southern California

  16. Branched polymers on branched polymers

    HEP - Theory (arXiv)

    Bergfinnur Durhuus; Thordur Jonsson

    1996-07-10

    We study an ensemble of branched polymers which are embedded on other branched polymers. This is a toy model which allows us to study explicitly the reaction of a statistical system on an underlying geometrical structure, a problem of interest in the study of the interaction of matter and quantized gravity. We find a phase transition at which the embedded polymers begin to cover the basis polymers. At the phase transition point the susceptibility exponent $\\gamma$ takes the value 3/4 and the two-point function develops an anomalous dimension 1/2.

  17. UNDERGRADUATE RESEARCH IN CHEMISTRY CHEMISTRY 180

    Engineering Websites

    Chen, Zhongping

    , or concurrent enrollment in, Analytical, Inorganic, and/or Physical Chemistry. How Do I Choose a Faculty MemberUNDERGRADUATE RESEARCH IN CHEMISTRY CHEMISTRY 180 Undergraduate research can be a rewarding, beneficial, and enjoyable experience for Chemistry majors who are planning either industrial employment

  18. CHEMISTRY DEPARTMENT Chem 315 (Honors Organic Chemistry)

    Biology and Medicine Websites

    Lawson, Catherine L.

    CHEMISTRY DEPARTMENT Chem 315 (Honors Organic Chemistry) Fall 2014 Important Registration Information Admission to Honors Organic Chemistry (Fall 2014) is restricted to the following students: Students who received an A in both semesters of General Chemistry (159 and 160 OR 161 and 162 OR 163

  19. SYLLABUS for CHEMISTRY 2310 ORGANIC CHEMISTRY 1

    Chemistry Websites

    Simons, Jack

    SYLLABUS for CHEMISTRY 2310 ORGANIC CHEMISTRY 1 Lectures: Monday, Wednesday and Friday 8:35 AM-9 · Highly Recommended Equipment: Turning Point Clicker · Highly Recommended: (1) "Organic Chemistry I Homework. · Class Objective: To study and begin to understand organic chemistry · Methods: Lectures

  20. REU PROJECT ON BRANCH POLYMERS SARA BILLEY, TOM BOOTHBY, MORGAN EICHWALD, AND CHRIS FOX

    Mathematics Websites

    Billey, Sara

    REU PROJECT ON BRANCH POLYMERS SARA BILLEY, TOM BOOTHBY, MORGAN EICHWALD, AND CHRIS FOX 1. A branched polymer of order n in R2 is obtained by plac- ing these disks in the plane in any configuration so at the origin. Branched polymers have been studied in con- nection with molecular chemistry, statistical physics

  1. Structure and dynamics of ring polymers Scott Brown and Grzegorz Szamel

    Chemistry Websites

    Szamel, Grzegorz

    Structure and dynamics of ring polymers Scott Brown and Grzegorz Szamel Department of Chemistry We study the equilibrium structure and dynamics of unconcatenated unknotted polymer rings in the melt-9606 98 52112-5 I. INTRODUCTION The dynamics of polymer melts and concentrated solu- tions

  2. revised manuscript (Updated 12nd To be submitted to Progress in Polymer Science

    Engineering Websites

    1 1st revised manuscript (Updated 12nd Jan, 2011) To be submitted to Progress in Polymer Science Technology and Polymer Chemistry, Karlsruhe Institute of Technology (KIT), Engesserstraße 18, 76128 Karlsruhe, Germany Kwang Soo Cho Department of Polymer Science, Kyungpook National University, Sangyeok-Dong 1370

  3. APPLIED PHYSICS REVIEWS Rare-earth doped polymers for planar optical amplifiers

    Physics Websites

    Polman, Albert

    APPLIED PHYSICS REVIEWS Rare-earth doped polymers for planar optical amplifiers L. H. Slooff,a) A. W. Hofstraat Philips Research, Department of Polymers and Organic Chemistry, Prof. Holstlaan 4, 5656 Optical waveguide amplifiers based on polymer materials offer a low-cost alternative for inorganic

  4. Coordination Polymers A Unique 3D Alternating Ferro-and

    Materials Science Websites

    Gao, Song

    .-B. Zhu Center for Molecular Science Institute of Chemistry, Organic Solids Laboratory Chinese Academy Key Laboratory of Rare Earth Materials and Applications College of Chemistry and Molecular Engineering polymers were synthesized by methods of conventional [*] Dr. C.-M. Liu, D.-Q. Zhang, Z.-L. Liu, Prof. D

  5. Coloured Polymers

    HEP - Lattice (arXiv)

    I. Pesando

    1993-04-26

    We show that non-oriented coloured polymers (self--avoiding walks with different types of links) are in the same universality class of the ordinary self--avoiding walks, while the oriented coloured are not.

  6. Coloured polymers

    CERN Preprints

    Pesando, I

    1993-01-01

    We show that non-oriented coloured polymers (self--avoiding walks with different types of links) are in the same universality class of the ordinary self--avoiding walks, while the oriented coloured are not.

  7. Branched Polymers

    Mathematical Physics (arXiv)

    Richard Kenyon; Peter Winkler

    2007-09-14

    Building on and from the work of Brydges and Imbrie, we give an elementary calculation of the volume of the space of branched polymers of order $n$ in the plane and in 3-space. Our development reveals some more general identities, and allows exact random sampling. In particular we show that a random 3-dimensional branched polymer of order $n$ has diameter of order $\\sqrt{n}$.

  8. Polymer inflation

    General Relativity & Quantum Cosmology (arXiv)

    Syed Moeez Hassan; Viqar Husain; Sanjeev S. Seahra

    2015-03-05

    We consider the semi-classical dynamics of a free massive scalar field in a homogeneous and isotropic cosmological spacetime. The scalar field is quantized using the polymer quantization method assuming that it is described by a gaussian coherent state. For quadratic potentials, the semi-classical equations of motion yield a universe that has an early "polymer inflation" phase which is generic and almost exactly de Sitter, followed by a epoch of slow-roll inflation. We compute polymer corrections to the slow roll formalism, and discuss the probability of inflation in this model using a physical Hamiltonian arising from time gauge fixing. We also show how in this model, it is possible to obtain a significant amount of slow-roll inflation from sub-Planckain initial data, hence circumventing some of the criticisms of standard scenarios. These results show the extent to which a quantum gravity motivated quantization method affects early universe dynamics.

  9. Polymer electronics

    CERN Preprints

    Geoghegan, Mark

    2013-01-01

    Polymer electronics is the science behind many important new developments in technology, such as the flexible electronic display (e-ink) and many new developments in transistor technology. Solar cells, light-emitting diodes, and transistors are all areas where plastic electronics is likely to, or is already having, a serious impact on our daily lives. With polymer transistors and light-emitting diodes now being commercialised, there is a clear need for a pedagogic text thatdiscusses the subject in a clear and concise fashion suitable for senior undergraduate and graduate students. The content

  10. CHEMISTRY 3020-43256 PHYSICAL CHEMISTRY I

    Chemistry Websites

    Findley, Gary L.

    CHEMISTRY 3020-43256 PHYSICAL CHEMISTRY I Fall 2013 8:00 am - 8:50 am, MWF SUGAR 259 INSTRUCTOR interpretations of the physical principles of chemistry. Goals/ Objectives: CHEM 3020 presents chemical principles from a fundamental physical point of view, this year focusing first on the quantum theoretical

  11. Biology 3515/Chemistry 3515 Biological Chemistry Laboratory

    Chemistry Websites

    Simons, Jack

    Biology 3515/Chemistry 3515 Biological Chemistry Laboratory Spring 2013 (Draft Syllabus, 23 August 2012) Course Description and Objectives: This course is intended for students who have taken Biology and function, particularly for enzymes. Prerequisites: Biology 3510 or Chemistry 3510 Instructor: David P

  12. CHEMISTRY 3020-43889 PHYSICAL CHEMISTRY I

    Chemistry Websites

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    Berns, Karsten

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    University of Cambridge - Dspace

    Parker, Richard M.; Zhang, Jing; Zheng, Yu; Coulston, Roger J.; Smith, Clive A.; Salmon, Andrew R.; Yu, Ziyi; Scherman, Oren A.; Abell, Chris

    2015-05-26

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    ................................................................................................. 10 #12;3 Course staff Dr John Daniels (Materials) Course Coordinator & Lecturer Room 342, School: by appointment A/Prof Stephen Colbran (Chemistry) Lecturer Room 225 Dalton Building (F12) Phone: 9385 4737 s: by appointment Ms Anne Ayres (Chemistry) Chemistry Tutorial and Laboratory Administrator Room 105 Dalton Building

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    /Prof Stephen Colbran (SC) (Chemistry) Lecturer Room 225 Dalton Building (F12) Phone: 9385 4737 s Mr Steve Yannoulatos (Chemistry) Chemistry Tutorial Room 104 Dalton Building Phone: 9385 4651 Location Monday 17:00 ­ 18:00 Sir John Clancy Auditorium Wednesday 14:00 ­ 15:00 Mathews Theatre A Friday

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  16. Facets of coordination chemistry

    CERN Preprints

    Agarwala, BV

    1993-01-01

    A concise account of coordination chemistry since its inception is given here together with some of the newer significant facets. This book covers a broad spectrum of various topics on Environment, Cyclic Voltammetry, Chromatography, Metal Complexes of biological interest, Alkoxides, NMR spectroscopy and others. These are useful to the scientific community engaged in the field of Inorganic Chemistry and Analytical Chemistry.

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    . Chemistry Britton, Edward Chemistry Carter, Bryn A. Chemistry Chappell, Emily A. Medicinal Chem Clay R. Chemistry Davies, Ryan D. Chemistry Day, Matthew W. Medicinal Chem Prof B Whitaker Dwyer, Dominic.12 Martin, David P. Chemistry S.Auer@leeds.ac.uk Mbatha, Sbusisiwe Z. Medicinal Chem Mckee, Joshua T

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    , Inorganic, Organic, and Physical) and students graduating with a Chemistry degree from Bishop's University with the departmental chairperson, from the first Organic Chemistry course and lab (CHM 111 and CHL 111) but this courseChemistry · 161 Chemistry The Chemistry Department offers three distinct programs -- Chemistry

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    Two-dimensional rare earth coordination polymers involving different coordination modes Key Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory on Rare; Coordination modes; Double-layered structure; Lanthanide 1. Introduction Coordination polymers of rare earth

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    Laboratory of Engineering Plastics, Joint Laboratory of Polymer Science and Materials, Institute of Chemistry fundamental properties of polymer melts.1 Generally, the viscosity-temper- ature behavior is divided in two is the density and the subscript r refers to properties of a reference state. Because of the relatively small

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    Goddard III, William A.

    and Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332-0245, DiVision of Chemistry and Chemical,6,16-23 and molecular machines24-29 in various environments, such as solution,5,6,30-37 polymer

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    Chemistry BSc in Medicinal Chemistry Integrated Masters in Chemistry Integrated Masters in Chemistry with Analytical Chemistry Integrated Masters in Medicinal Chemistry BSc in Chemistry and Mathematics Integrated

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    16:155:551 (01) (14706) Polymer Science and Engineering l Fall 2015 Lectures: Wed. 5-8 PM: An introduction to polymers from synthesis to basic properties to structure/properties relationships. Textbook: No required Text Reference Books: Contemporary Polymer Chemistry, Allcock, Lampe, and Mark

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    Moses, Elisha

    measurements of polymers under shear flow 7:Kume, K. Asakawa+,E. Moses", K. Matsuzaka`" and 7:Hashimoto* Division of Polymer Chemistry, Graduate School of Engineering, Kyoto University, Kyoto 606-01, Japan, Israel + + + Present address: The Hashimoto Polymer Phasing Project, ERATO, Research Development Co

  5. A Three-Dimensional Coordination Polymer Featuring Effective Ferrimagnetic Hydroxide-Bridged Manganese(II) Chains

    Chemistry Websites

    Li, Jing

    A Three-Dimensional Coordination Polymer Featuring Effective Ferrimagnetic Hydroxide Varughese,§ and Jing Li*,§ Department of Chemistry and State Key Laboratory for Physical Chemistry of Solid Surface, Xiamen UniVersity, Xiamen 361005, China, Department of Physics, Temple UniVersity, Philadelphia

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    Cohen, Itai

    the margins within which defect-free and smooth-surface products can be produced (slip has been long related by substrate surface energy, substrate roughness, polymer chemistry, molecular weight, molecular weight such as extrusion, mixing, coating, and lubrication. Depending on the application, slip can be beneficial

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  11. B.A. DEGREE REQUIREMENTS FOR CHEMISTRY (CHEMISTRY TRACK)

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  13. Advances in quantum chemistry

    CERN Preprints

    Sabin, John R

    2013-01-01

    Advances in Quantum Chemistry presents surveys of current topics in this rapidly developing field that has emerged at the cross section of the historically established areas of mathematics, physics, chemistry, and biology. It features detailed reviews written by leading international researchers. This volume focuses on the theory of heavy ion physics in medicine.Advances in Quantum Chemistry presents surveys of current topics in this rapidly developing field that has emerged at the cross section of the historically established areas of mathematics, physics, chemistry, and biology. It features

  14. Group theory and chemistry

    CERN Preprints

    Bishop, David M

    1993-01-01

    Group theoretical principles are an integral part of modern chemistry. Not only do they help account for a wide variety of chemical phenomena, they simplify quantum chemical calculations. Indeed, knowledge of their application to chemical problems is essential for students of chemistry. This complete, self-contained study, written for advanced undergraduate-level and graduate-level chemistry students, clearly and concisely introduces the subject of group theory and demonstrates its application to chemical problems.To assist chemistry students with the mathematics involved, Professor Bishop ha

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    to familiarize you with your teaching responsibilities for General Chemistry and Organic Chemistry and to provideGuide for Teaching Assistants Department of Chemistry The University of Chicago #12;© 2012 Department of Chemistry, The University of Chicago (2nd edition) #12;i Preface Welcome to the Chemistry

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    Category: Inorganic chemistry Silicon chemistry: Come on silene Neil Withers Abstract Thermal rearrangement yields the first example of a bis-silene -- a compound containing two carbon­silicon double bonds Introduction © 2008 Wiley Silenes are compounds that contain a carbon atom double-bonded to a silicon atom

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  20. Pulling Knotted Polymers

    Condensed Matter (arXiv)

    Oded Farago; Yacov Kantor; Mehran Kardar

    2002-05-06

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    Materials: · General, Organic, and Biological Chemistry, 2nd edition, Smith (McGraw Hill, 2013). It's best ELECTRONIC DEVICES CAPABLE OF STORING ALPHANUMERIC DATA ARE NOT ALLOWED FOR USE ON EXAMS. TI-30 calculators, and a record of your grades. Please make sure that the email address you have registered under your profile

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    B. Grissom Office: 1128 HEB Telephone: 581-4153 e-mail: grissomc@chemistry.utah.edu ADMINISTRATIVE-mail: ssmith@chem.utah.edu Mr. Randy Adachi Office Hours: by appointment in 1316 HEB Telephone: 1-4175 e-mail: adachi@chem.utah.edu DISCUSSION Five discussion sessions with the Teaching Assistants are scheduled

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    CERN Preprints

    Frassino, Antonia M; Mureika, Jonas R

    2015-01-01

    The connection between black hole thermodynamics and chemistry is extended to the lower-dimensional regime by considering the rotating and charged BTZ metric in the $(2+1)$-D and a $(1+1)$-D limits of Einstein gravity. The Smarr relation is naturally upheld in both BTZ cases, where those with $Q \

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    General Relativity & Quantum Cosmology (arXiv)

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    2015-09-18

    The connection between black hole thermodynamics and chemistry is extended to the lower-dimensional regime by considering the rotating and charged BTZ metric in the $(2+1)$-D and a $(1+1)$-D limits of Einstein gravity. The Smarr relation is naturally upheld in both BTZ cases, where those with $Q \

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    Cohen, Ronald C.

    . Johnson, Lynn F. Lee, Kevin R. Wilson, Louis H. Haber, and Richard J. Saykallya) Department of Chemistry-energy species in energy funneling processes.19 Thus, understanding both the details of the electronic on the how the conjugated polymer film was processed.9,10,20,21 In conjugated polymer films produced by spin

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    Thermodynamic Stability Chemistry 223 David Ronis McGill University dS dS21 dN dN21 dV dV21 1 2 Fig Stability -2- Chemistry 223 Given that dEtotal = dE1 + dE2, (2) where, as usual, dEi = Ti dSi - Pi dVi + µi,Ni dV2 i +. . . , (10) or in matrix notation: Fall Term, 2014 #12;Thermodynamic Stability -3- Chemistry

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    CERN Preprints

    Sessler, Jonathan L; Stoddart, J Fraser

    2006-01-01

    Anion recognition plays a critical role in a range of biological processes, and a variety of receptors and carriers can be found throughout the natural world. Chemists working in the area of supramolecular chemistry have created a range of anion receptors, drawing inspiration from nature as well as their own inventive processes. This book traces the origins of anion recognition chemistry as a unique sub-field in supramolecular chemistry while illustrating the basic approaches currently being used to effect receptor design.The combination of biological overview and summary of current synthetic

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    University of Kansas - KU ScholarWorks

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    2009-01-01

    .4.1 Combinatorial Chemistry??????????????...34 2.4.2 Solid-Phase Organic Synthesis Utilizing Polymer-bound Transition Metal Complexes as Catalysts????????....34 2.4.3 Solid-Phase Organic Synthesis utilizing Polymer-bound Transition.... catalyst/catalytic (CD 3 ) 2 CO acetone (deuterated) CH 3 CN acetonitrile CH 3 COCl acetyl chloride CHIRAPHOS (2S,3S)-(?)-bis(diphenylphosphino)butane cm centimeter COD 1,5-cyclooctadiene xiii COE cyclooctene Cy...

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  11. Chem 3890 Physical Chemistry I Fall 2011 Chemistry 3890

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    Chem 3890 Physical Chemistry I Fall 2011 Chemistry 3890 Problem Set 0 Fall 2011 Last revised: August 25, 2011 About partial derivatives The language of physical chemistry is mathematics; understanding and applying the concepts of physical chemistry requires some proficiency in this language

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    FACULTY OF CHEMISTRY AND PHARMACY Chemistry at the UR Bachelor and Master programmes Information Advisory Service Chemistry) phone: +49 (0) 941 943-4573 fax: +49 (0) 941 943-5565 claudia semester (october). It overviews the core subjects of Chemistry and the essential basics in mathematics

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    Eindhoven, Technische Universiteit

    Modelling of Industrial Processes for Polymer Melts: Extrusion and Injection Moulding Fons van de ways for improving the processes (better final products, shorter production times). A special point, [1]); #12; Industrial Processes for Polymer Melts 3 (b) On the basis of a 1­dimensional, discrete

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    Sherrill, David

    Lett., Tetrahedron, Biotechnology and Bioengineering, Journal of Biotechnology, Enzyme and Microbial Technology, Industrial Biotechnology, Biofuels, Bioproducts and Biorefining, BioEnergy Research, Science

  3. Unusual molecular architectures in liquid crystal and polymer chemistry

    MIT - DSpace

    Paraskos, Alexander John, 1969-

    2004-01-01

    This dissertation details the synthesis and characterization of materials that consist of molecules with unusual shapes. We have pursued this goal into the regimes of both small molecules (liquid crystals) and polymeric ...

  4. CHEMISTRY 1010 CHEMISTRY, HUMANITY AND ENVIRONMENT

    Chemistry Websites

    Simons, Jack

    1319, 581-6536, kesner@chem.utah.edu, Mailbox in HEB 1504 Office hours: M W F 10 - 11:30 a - 002 H ST 205 11:50 a.m.-12:40 p.m. Teaching Assistant: Chem 1010-002 Michelle Taliaferro, michelle@chemistry.utah. The University of Utah seeks to provide equal access to its programs, services and activities for people

  5. Chemistry & Biology Brief Communication

    Biology and Medicine Websites

    Nizet, Victor

    Chemistry & Biology Brief Communication N-Terminal ArgD Peptides from the Classical Staphylococcus Staphylococcus aureus (Recsei et al., 1986). A classical model of growth phase-dependent gene regu- lation, Agr

  6. Chemistry and Chemical Biology

    Biotechnology Websites

    Linhardt, Robert J.

    most pressing problems such as developing new clean systems for solar energy generation, environmentally sustainable chemistry, working on critical problems in biotechnology related health as well and biotechnology, energy sciences, physics, biochemistry, computational methods, material science

  7. Analytical Chemistry Applied Mathematics

    Mathematics Websites

    Heller, Barbara

    Mathematics Education Mechanical & Aerospace Engineering Molecular Biochemistry & Biophysics NetworkAnalytical Chemistry Applied Mathematics Architectural Engineering Architecture Architecture/Integrated Building Delivery Biology Biological Engineering Biomedical Engineering Biomedical Imaging & Signals

  8. Associate Scientist CHEMISTRY INTERN

    Biotechnology Websites

    Thirumalai, Devarajan

    interested in a summer internship at our Baltimore, Maryland location. This is an excellent opportunity in Chemistry or related field and must be currently enrolled as an undergraduate student. Minimum overall GPA

  9. SCALING FOR A ONE-DIMENSIONAL DIRECTED POLYMER WITH BOUNDARY CONDITIONS (REVISED)

    Mathematics Websites

    Seppäläinen, Timo

    SCALING FOR A ONE-DIMENSIONAL DIRECTED POLYMER WITH BOUNDARY CONDITIONS (REVISED) TIMO SEPP¨AL¨AINEN Abstract. We study a 1+1-dimensional directed polymer in a random environment on the integer lattice with log-gamma distributed weights. Among directed polymers this model is special in the same way

  10. CHEMISTRY COURSE OFFERINGS SPRING, 2016

    Chemistry Websites

    Kounaves, Samuel P.

    CHEMISTRY COURSE OFFERINGS SPRING, 2016 (10/14/15) CHEM 0001-01 - CHEMICAL FUNDAMENTALS W, and thermochemistry. Additional topics may include qualitative thermodynamics and equilibrium and chemistry, and coordination chemistry, and chemistry of selected elements. Three lectures, one laboratory, one recitation

  11. INFORMATION FOR UNDERGRADUATE CHEMISTRY MAJORS

    Mathematics Websites

    Turc, Catalin

    ; Professor of Organic Chemistry Thomas Gray, Ph.D. Harvard, 2002, Assistant Professor of Inorganic Chemistry.D. The Pennsylvania State University, 1995, Associate Professor of Bio-Organic Chemistry Anthony J. Pearson, Ph.D. University of Aston (England), 1974; Rudolph and Susan Rense Professor of Organic Chemistry John D

  12. CHEMISTRY SENIORS ANNUAL PRIZE COMPETITIONS

    Chemistry Websites

    Vertes, Akos

    (Analytical, Inorganic, Organic, and Physical) in chemistry. The Byrne Thurtell Burns Memorial Prize is awarded to the graduating major who shows the greatest proficiency in organic chemistry as demonstratedCHEMISTRY SENIORS ANNUAL PRIZE COMPETITIONS Each spring the Chemistry Department sponsors

  13. Mechanics of amorphous polymers and polymer gels

    MIT - DSpace

    Chester, Shawn Alexander

    2011-01-01

    Many applications of amorphous polymers require a thermo-mechanically coupled large-deformation elasto-viscoplasticity theory which models the strain rate and temperature dependent response of amorphous polymeric materials ...

  14. Tunneling of Polymer Particles

    Quantum Physics (arXiv)

    A. Martín-Ruiz; E. Chan-López; A. Carbajal-Domínguez; J. Bernal

    2014-08-28

    In this paper we study the tunneling using a background independent (polymer) quantization scheme. We show that at low energies, for the tunneling through a single potential barrier, the polymer transmission coefficient and the polymer tunneling time converge to its quantum-mechanical counterparts in a clear fashion. As the energy approaches the maximum these polymer quantities abruptly decrease to zero. We use the transfer matrix method to study the tunneling through a series of identical potential barriers. We obtain that the transmission coefficients (polymer and quantum-mechanical) behave qualitatively in a similar manner, as expected. Finally we show that the polymer tunneling time exhibits anomalous peaks compared with the standard result. Numerical results are also presented.

  15. Directed polymers and Randomness

    Condensed Matter (arXiv)

    Somendra M. Bhattacharjee

    2005-05-11

    The effects of two types of randomness on the behaviour of directed polymers are discussed in this chapter. The first part deals with the effect of randomness in medium so that a directed polymer feels a random external potential. The second part deals with the RANI model of two directed polymers with heterogeneity along the chain such that the interaction is random. The random medium problem is better understood compared to the RANI model.

  16. Proteins and polymers

    Condensed Matter (arXiv)

    Jayanth R. Banavar; Trinh Xuan Hoang; Amos Maritan

    2005-08-08

    Proteins, chain molecules of amino acids, behave in ways which are similar to each other yet quite distinct from standard compact polymers. We demonstrate that the Flory theorem, derived for polymer melts, holds for compact protein native state structures and is not incompatible with the existence of structured building blocks such as $\\alpha$-helices and $\\beta$-strands. We present a discussion on how the notion of the thickness of a polymer chain, besides being useful in describing a chain molecule in the continuum limit, plays a vital role in interpolating between conventional polymer physics and the phase of matter associated with protein structures.

  17. Chemistry Student Handbook College of Science

    Mathematics Websites

    Hickman, Mark

    Chemistry Student Handbook College of Science React. Science #12;Contents 2 Welcome to the Department of Chemistry 2 Course Advice 3 What is Chemistry? 4 Career Profiles in Chemistry 5 An Undergraduate Degree in Chemistry 6 Chemistry Streams 13 Chemistry Honours Programme 14 Research

  18. Chemistry(ACS) CollegeofScience CHEMBSCHM

    Biotechnology Websites

    Kihara, Daisuke

    (1)CHM34201 InorganicChemistryLab (3)CHM37300 PhysicalChemistry (3)CHM37400 PhysicalChemistry (1)CHM37301 PhysicalChemistryLab (1)CHM37401 PhysicalChemistryLab (4)CHM42400 AnalyticalChemistryII (1Chemistry(ACS) CollegeofScience CHEMBSCHM CHMA 120Credits 2.0GPAinCHMcoursesand2

  19. 6982 | Chem. Soc. Rev., 2014, 43, 6982--7012 This journal is The Royal Society of Chemistry 2014 Cite this: Chem. Soc. Rev., 2014,

    Materials Science Websites

    Cheng, Jianjun

    of smart chemistry developed and utilized in the last 5­10 years in polymer-based drug delivery nanomedicine. Smart chemistry not only facilitates the controlled drug loading in a highly specific manner, but also potentially controls the drug release kinetics at the targeted tissues. This review highlights

  20. Mathematics for physical chemistry

    CERN Preprints

    Mortimer, Robert G

    2005-01-01

    Mathematics for Physical Chemistry, Third Edition, is the ideal text for students and physical chemists who want to sharpen their mathematics skills. It can help prepare the reader for an undergraduate course, serve as a supplementary text for use during a course, or serve as a reference for graduate students and practicing chemists. The text concentrates on applications instead of theory, and, although the emphasis is on physical chemistry, it can also be useful in general chemistry courses. The Third Edition includes new exercises in each chapter that provide practice in a technique immediately after discussion or example and encourage self-study. The first ten chapters are constructed around a sequence of mathematical topics, with a gradual progression into more advanced material. The final chapter discusses mathematical topics needed in the analysis of experimental data.* Numerous examples and problems interspersed throughout the presentations * Each extensive chapter contains a preview, objectives, and ...

  1. Macromolecular Chemistry and Physics

    Physics Websites

    Heflin, Randy

    between charged electrodes, generated stress upon the application of an electric field, and ion-transport and charge accumulation to facilitate electromechanical coupling.[1,6,7] Ion-containing polymeric membranes form a class of devices classified as ionic-polymer transducers, and these electromechanical

  2. Stiff Quantum Polymers

    Condensed Matter (arXiv)

    H. Kleinert

    2007-05-01

    At ultralow temperatures, polymers exhibit quantum behavior, which is calculated here for the moments and of the end-to-end distribution in the large-stiffness regime. The result should be measurable for polymers in wide optical traps.

  3. Melons are branched polymers

    HEP - Theory (arXiv)

    Razvan Gurau; James P. Ryan

    2013-02-18

    Melonic graphs constitute the family of graphs arising at leading order in the 1/N expansion of tensor models. They were shown to lead to a continuum phase, reminiscent of branched polymers. We show here that they are in fact precisely branched polymers, that is, they possess Hausdorff dimension 2 and spectral dimension 4/3.

  4. Branched Polymers with Loops

    HEP - Theory (arXiv)

    J. Jurkiewicz; A. Krzywicki

    1996-10-08

    We propose a classification of critical behaviours of branched polymers for arbitrary topology. We show that in an appropriately defined double scaling limit the singular part of the partition function is universal. We calculate this partition function exactly in the generic case and perturbatively otherwise. In the discussion section we comment on the relation between branched polymer theory and Euclidean quantum gravity.

  5. Polymer Reaction & Colloidal Engineering

    Geosciences Websites

    Giger, Christine

    of magnetite polymer composite nano- particles for both drug delivery and material science applications research in numerous areas related to polymer and colloid science and enginee- ring. Our research activity relevant problems or for the preparation of materials with controlled structure. Our areas of expertise

  6. Melons are branched polymers

    CERN Preprints

    Gurau, Razvan

    2013-01-01

    Melonic graphs constitute the family of graphs arising at leading order in the 1/N expansion of tensor models. They were shown to lead to a continuum phase, reminiscent of branched polymers. We show here that they are in fact precisely branched polymers, that is, they possess Hausdorff dimension 2 and spectral dimension 4/3.

  7. Stiff quantum polymers

    Condensed Matter (arXiv)

    H. Kleinert

    2009-10-19

    At ultralow temperatures, polymers exhibit quantum behavior, which is calculated here for the second and fourth moments of the end-to-end distribution in the large-stiffness regime. The result should be measurable for polymers in wide optical traps.

  8. Modeling semiflexible polymer networks

    CERN Preprints

    Broedersz, Chase P

    2014-01-01

    Here, we provide an overview of theoretical approaches to semiflexible polymers and their networks. Such semiflexible polymers have large bending rigidities that can compete with the entropic tendency of a chain to crumple up into a random coil. Many studies on semiflexible polymers and their assemblies have been motivated by their importance in biology. Indeed, crosslinked networks of semiflexible polymers form a major structural component of tissue and living cells. Reconstituted networks of such biopolymers have emerged as a new class of biological soft matter systems with remarkable material properties, which have spurred many of the theoretical developments discussed here. Starting from the mechanics and dynamics of individual semiflexible polymers, we review the physics of semiflexible bundles, entangled solutions and disordered cross-linked networks. Finally, we discuss recent developments on marginally stable fibrous networks, which exhibit critical behavior similar to other marginal systems such as j...

  9. Modeling semiflexible polymer networks

    Condensed Matter (arXiv)

    Chase P. Broedersz; Fred. C. MacKintosh

    2014-04-16

    Here, we provide an overview of theoretical approaches to semiflexible polymers and their networks. Such semiflexible polymers have large bending rigidities that can compete with the entropic tendency of a chain to crumple up into a random coil. Many studies on semiflexible polymers and their assemblies have been motivated by their importance in biology. Indeed, crosslinked networks of semiflexible polymers form a major structural component of tissue and living cells. Reconstituted networks of such biopolymers have emerged as a new class of biological soft matter systems with remarkable material properties, which have spurred many of the theoretical developments discussed here. Starting from the mechanics and dynamics of individual semiflexible polymers, we review the physics of semiflexible bundles, entangled solutions and disordered cross-linked networks. Finally, we discuss recent developments on marginally stable fibrous networks, which exhibit critical behavior similar to other marginal systems such as jammed soft matter.

  10. The Semantics of Chemical Markup Language (CML) for Computational Chemistry : CompChem

    University of Cambridge - Dspace

    Phadungsukanan, Weerapong; Kraft, Markus; Townsend, Joe A; Murray-Rust, Peter

    2012-08-07

    tags and attributes). It covers most aspects of chemistry, e.g., CMLReact [25] for chemical reactions, CMLSpec [26] for spectral data, CML for crystallography [27] and CML for polymers (PML) [28]. With the CML Schema, one can determine if a CML document...

  11. Pingcheng Chu, Chemistry BA, University of Science and Technology of China, 2012, is now

    Chemistry Websites

    Lawson, Catherine L.

    years, with a Ph.D. from Rutgers made possible by the McCoy Family Fellowship, Pingcheng plans to benefit people's lives For more information on the McCoy Fellowship, please visit us at http://chem.rutgers.edu/mccoy-family-fellowship-women-chemistry-and-business. Kathryn Uhrich's laboratory focusing on organic polymer synthesis and developing novel amphiphilic

  12. B.A. DEGREE REQUIREMENTS FOR CHEMISTRY (BIOLOGICAL CHEMISTRY TRACK)

    Chemistry Websites

    Doyle, Robert

    B.A. DEGREE REQUIREMENTS FOR CHEMISTRY (BIOLOGICAL CHEMISTRY TRACK) Requirements include 21 credits from chemistry core courses, 6 credits from the list, (2) below, of approved biology/biochemistry core.) Required Biology/Biochemistry Core Courses BIO 475: Biochemistry Laboratory (4) OR CHE/BCM 477

  13. A variational approach to charged polymer chains: Polymer mediated interactions

    Physics Websites

    Podgornik, Rudolf

    A variational approach to charged polymer chains: Polymer mediated interactions R. Podgornika charged polymer, considered as a model of polyelectrolyte-macroion interactions. The quadratic variational generalized to include polymer self-interactions.Conditions for chain localization in the field of a point

  14. POLYMER PROGRAM SEMINAR "Polymer Nanofibers: Electrospinning, Structure, and Properties"

    Materials Science Websites

    Alpay, S. Pamir

    POLYMER PROGRAM SEMINAR "Polymer Nanofibers: Electrospinning, Structure, and Properties" Dr. Masaya been widely employed as a technique to produce sub-micron and nanometer scale polymer fibers. The technique utilizes electrical forces induced by a high voltage to draw charged polymer solution jet

  15. Chemistry & Biology Perspective

    Chemistry Websites

    Williams, Loren

    Chemistry & Biology Perspective The Origin of RNA and ``My Grandfather's Axe'' Nicholas V. Hud,1 *Correspondence: hud@gatech.edu http://dx.doi.org/10.1016/j.chembiol.2013.03.012 The origin of RNA is one

  16. High School Chemistry or

    Computer Technologies and Information Sciences Websites

    Hua, Kien A.

    ** Principles of Chemistry (4) STA 3032 Probability / Statistics (3) EEE 3350 Semiconductor Devices 1 (3) EEL Electronics I (4) EEL 4914 Senior Design I (3) EEL 4915L Senior Design II (3) EEL 3552C Analog & Dig Comm (4) EEL 3470 Electromagnetic Fields (3) EEL 3801C** Computer Organization (3) EEL 4742C Embedded Systems

  17. High School Chemistry or

    Computer Technologies and Information Sciences Websites

    DeMara, Ronald F.

    ) EEL 3004C Electrical Networks (3) EEE 3342C Digital Systems (3) EEL 3801C Computer Organization (3) COP 4600 Operating Systems (3) STA 3032 Prob & Stats for Engrs (3) EEL 4781 Comp Comm Networks (3) EEL 4768 Computer Architecture (3) EEL 4742C Embedded Systems (4) CHS 1440** Principles of Chemistry (4

  18. Chemistry in Protoplanetary Disks

    CERN Preprints

    Henning, Thomas

    2013-01-01

    This comprehensive review summarizes our current understanding of the evolution of gas, solids and molecular ices in protoplanetary disks. Key findings related to disk physics and chemistry, both observationally and theoretically, are highlighted. We discuss which molecular probes are used to derive gas temperature, density, ionization state, kinematics, deuterium fractionation, and study organic matter in protoplanetary disks.

  19. October CUME Organic Chemistry

    Chemistry Websites

    Glaser, Rainer

    --Columbia Saturday, October 10, 1998, @Nine O'Clock, 125I Chemistry Dr. Rainer Glaser Announced Reading: "Aromatic was found to rearrange to compound 4a (note that 1 and 4a are in fact identical so long as the O-atoms

  20. Chemistry & Biology Brief Communication

    Biology and Medicine Websites

    van Aalten, Daan

    Chemistry & Biology Brief Communication Synergy of Peptide and Sugar in O-GlcNAcase Substrate with the sugar, O-GlcNAcase recog- nizes the peptide backbone through hydrophobic interactions and intramolecular yielding samples suitable for biochem- ical studies, attempts to crystallize the protein have so far failed

  1. CHEMISTRY AND TOXICITY OF

    Energy Storage, Conversion and Utilization Websites

    #12;CHEMISTRY AND TOXICITY OF THREE WASTEWATERS DOE FRAP 1993-08 Prepared for Environment Canada and phosphorus, aluminum and zinc. A long list of chlorinated organic compounds were identified in the pulp mill effluent, all in extremely low concentrations, but the total adsorbable organic halides (AOX) concentration

  2. Using Chemistry instrumentation without

    Engineering Websites

    Berdichevsky, Victor

    Account & One Card Access to the lab .TO BE COMPLETED BY LAB MANAGER Lab Mgr Initials) User Information (please print or type clearly) I already have a Resource Manager Account for useUsing Chemistry instrumentation without scheduling time through Resource Manager System will result

  3. Polymers pushing Polymers: Polymer Mixtures in Thermodynamic Equilibrium with a Pore

    Condensed Matter (arXiv)

    Rudolf Podgornik; Jaime Hopkins; V. Adrian Parsegian; Murugappan Muthukumar

    2012-08-20

    We investigate polymer partitioning from polymer mixtures into nanometer size cavities by formulating an equation of state for a binary polymer mixture assuming that only one (smaller) of the two polymer components can penetrate the cavity. Deriving the partitioning equilibrium equations and solving them numerically allows us to introduce the concept of "polymers-pushing-polymers" for the action of non-penetrating polymers on the partitioning of the penetrating polymers. Polymer partitioning into a pore even within a very simple model of a binary polymer mixture is shown to depend in a complicated way on the composition of the polymer mixture and/or the pore-penetration penalty. This can lead to enhanced as well as diminished partitioning, due to two separate energy scales that we analyse in detail.

  4. Long-Range Ferromagnetic Ordering in Two-Dimensional Coordination Polymers Co[N(CN)2]2(L) [L ) Pyrazine Dioxide (pzdo) and 2-Methyl

    Chemistry Websites

    Gao, Song

    Laboratory of Rare Earth Materials Chemistry and Applications, PKU-HKU Joint Laboratory on Rare Earth, which offer rare examples of mixed 1,5-µ- and µ3-dca bridging coordination polymers with long-range ferromagnetic ordering below ca. 2.5 K. The design and synthesis of metal coordination polymers are currently

  5. CHEMISTRY EDUCATION: RESEARCH AND PRACTICE

    Multidisciplinary Databases and Resources Websites

    Bodner, George M.

    CHEMISTRY EDUCATION: RESEARCH AND PRACTICE 2004, Vol. 5, No. 1, pp. 15-32 INVITED SPECIAL SECTION: Contributions of Educational Research to the Practice of Chemistry Education Methods and issues of teaching of Biochemistry and Learning, Teaching, and Curriculum (USA) 2 Purdue University, Department of Chemistry (USA

  6. CHEMISTRY 3100 FALL SEMESTER 2005

    Chemistry Websites

    Simons, Jack

    ) "Inorganic Chemistry," Housecroft and Sharpe (recommended) CLASS: M W F: 8:05 - 9:25 PM, ROOM 140 JTB RECOMMENDED REFERENCES: *F. Cotton and G. Wilkinson, "Advanced Inorganic Chemistry" *F. Cotton, G. Wilkinson, and P.L. Gaus, "Basic Inorganic Chemistry" *F. Cotton, "Chemical Applications of Group Theory" *R. Drago

  7. Tamar Seideman Department of Chemistry

    Materials Science Websites

    Seideman, Tamar

    Tamar Seideman Department of Chemistry Northwestern University Evanston, IL 60208-3113 Phone: 847­1989 Ph.D. in Theoretical Chemistry (summa cum laude), The Weizmann Institute of Science, Rehovot. 1983­1985 M.Sc. in Physical Chemistry (summa cum laude), The Weizmann Institute of Science, Rehovot. 1980

  8. POLICY MANUAL DEPARTMENT OF CHEMISTRY

    Biology and Medicine Websites

    Ha, Taekjip

    POLICY MANUAL DEPARTMENT OF CHEMISTRY UNIVERSITY OF ILLINOIS AT URBANA-CHAMPAIGN TABLE OF CONTENTS I. BYLAWS Bylaws of the Department of Chemistry . . . . 2 Excerpts from the University Statutes in a Non-Chemistry Lab . . 24 Graduate Student Transfers from Other Campus Departments . 25 TA Appointments

  9. Chemistry Archive Draft Catalogue ACKNOWLEDGMENTS

    Biology and Medicine Websites

    Chan, Hue Sun

    Chemistry Archive Draft Catalogue ACKNOWLEDGMENTS The pieces in this archive have been collected (for the programme of the 36th Annual Banquet of the Chemistry Club 1955) http://www. Also note the Colin Hahnemann Bayley Fellowship in Chemistry Davenport documents J. Bryan Jones

  10. Marquette University Department of Chemistry

    Chemistry Websites

    Reid, Scott A.

    Marquette University Department of Chemistry #12;Do You Want A Career that will.... Directly your ideas with others? A Marquette Chemistry degree will prepare you for advanced study or for a job right after graduation! #12;Career Possibilities for Chemistry Students Health professions Industry

  11. Medicinal Chemistry and Enzyme Kinetics

    Chemistry Websites

    Truhlar, Donald G

    Medicinal Chemistry and Enzyme Kinetics Elizabeth Amin and C. R. Wagner, Medicinal Chemistry Jiali and parameters for MM, QM/MM work Prof. Elizabeth A. Amin, Department of Medicinal Chemistry, College of Pharmacy of bioavailability and ADMETox in drug design See a separate research highlight on solvation for further medicinal

  12. Chemistry Curriculum Semester 1 (AUG)

    Computer Technologies and Information Sciences Websites

    Pal, Debnath

    of acid-base strength, HSAB. Semester 3 (AUG) Basic Organic Chemistry (2:1) Nomenclature of organic gas compounds; Chemistry of f-block elements. Basic Organic Reactions (2:0) (Core for majors) AcidsChemistry Curriculum Semester 1 (AUG) Physical Principles (2:1) Bohr theory, Wave Particle Duality

  13. Supramolecular chemistry and crystal engineering ASHWINI NANGIA

    Biology and Medicine Websites

    Giri, Ranjit K.

    Supramolecular chemistry and crystal engineering ASHWINI NANGIA School of Chemistry, University of Hyderabad, Hyderabad 500 046, India. e-mail: ashwini.nangia@gmail.com Advances in supramolecular chemistry directions for interdisciplinary research in chemistry with materials and pharmaceutical scientists

  14. Scaling exponents of star polymers

    Condensed Matter (arXiv)

    Christian von Ferber; Yurij Holovatch

    2002-03-25

    We review recent results of the field theoretical renormalization group analysis on the scaling properties of star polymers. We give a brief account of how the numerical values of the exponents governing the scaling of star polymers were obtained as well as provide some examples of the phenomena governed by these exponents. In particular we treat the interaction between star polymers in a good solvent, the Brownian motion near absorbing polymers, and diffusion-controlled reactions involving polymers.

  15. UNIVERSITY OF MARYLAND Department of Chemistry & Biochemistry

    Biotechnology Websites

    Thirumalai, Devarajan

    . The study program in Chemistry should have included at least 1 year of physical chemistry, 1 year of organic, physical chemistry and analytical chemistry. The study program in Biochemistry should have included at least 1 year of Organic Chemistry, 1 year of Biochemistry, 1 semester of Physical Chemistry, as well

  16. UNIVERSITY OF MARYLAND Chemistry Graduate Program

    Biotechnology Websites

    Thirumalai, Devarajan

    have included at least 1 year of physical chemistry, 1 year of organic chemistry and 1 semester ofinorganic chemistry, as well as laboratory courses in organic chemistry, physical chemistry and analytical examination(Chemistry, Biochemistry, Physics, or Biology) is recommended but not required. Applicants from non

  17. Computerized Stokes analysis of optically active polymer films

    CERN Preprints

    Georgiev, Georgi

    2010-01-01

    Optics labs are an integral part of the advanced curriculum for physics majors. Students majoring in other disciplines, like chemistry, biology or engineering rarely have the opportunity to learn about the most recent optical techniques and mathematical representation used in todayâ??s science and industry optics. Stokes analysis of polarization of light is one of those methods that are increasingly necessary but are seldom taught outside advanced physics or optics classes that are limited to physics majors. On the other hand biology and chemistry majors already use matrix and polarization techniques in the labs for their specialty, which makes the transition to matrix calculations seamless. Since most of the students in those majors postpone their enrollment in physics, most of the registered in those classes are juniors and seniors, enabling them to handle those techniques. We chose to study polymer samples to aid students majoring in other disciplines, especially chemistry and engineering, with understa...

  18. Online polymer crystallization experiment

    MIT - DSpace

    Pridmore, Derik A. (Derik Arnold), 1978-

    2005-01-01

    An architecture for online remote operation of a polymer crystallization experiment was refined, beta tested in actual use conditions, and extended based on feedback from those tests. In addition, an application for ...

  19. Dielectric Actuation of Polymers

    University of California eScholarship Repository

    Niu, Xiaofan

    2013-01-01

    thermoplastic elastomer gels?: A morphological and (electro)mechanical propertyThermoplastic linear polymers with plasticizers Mechanical propertyproperties and electric breakdown strength of a subpercolative composite of carbon black in thermoplastic

  20. Polymer quantization and Symmetries

    General Relativity & Quantum Cosmology (arXiv)

    Ghanashyam Date; Nirmalya Kajuri

    2013-02-24

    Polymer quantization was discovered during the construction of Loop Quantum Cosmology. For the simplest quantum theory of one degree of freedom, the implications for dynamics were studied for the harmonic oscillator as well as some other potentials. For more degrees of freedom, the possibility of continuous, kinematic symmetries arises. While these are realised on the Hilbert space of polymer quantum mechanics, their infinitesimal versions are not supported. For an invariant Hamiltonian, these symmetry realizations imply infinite degeneracy suggesting that the symmetry should be spontaneously or explicitly broken. The estimation of symmetry violations in some cases have been analysed before. Here we explore the alternative of shifting the arena to the distributional states. We discuss both the polymer quantum mechanics case as well as polymer quantized scalar field.

  1. Heavily fluorinated electronic polymers

    MIT - DSpace

    Lim, Jeewoo

    2011-01-01

    Building blocks, containing majority fluorine content by weight, for PPEs and PPVs have been synthesized. Some of the monomers were shown to give exclusively fluorous-phase soluble polymers, the syntheses of which were ...

  2. Physics of thick polymers

    Condensed Matter (arXiv)

    D. Marenduzzo; A. Flammini; A. Trovato; J. R. Banavar; A. Maritan

    2005-08-19

    We present the results of analytic calculations and numerical simulations of the behaviour of a new class of chain molecules which we call thick polymers. The concept of the thickness of such a polymer, viewed as a tube, is encapsulated by a special three body interaction and impacts on the behaviour both locally and non-locally. When thick polymers undergo compaction due to an attractive self-interaction, we find a new type of phase transition between a compact phase and a swollen phase at zero temperature on increasing the thickness. In the vicinity of this transition, short tubes form space filling helices and sheets as observed in protein native state structures. Upon increasing the chain length, or the number of chains, we numerically find a crossover from secondary structure motifs to a quite distinct class of structures akin to the semi-crystalline phase of polymers or amyloid fibers in polypeptides.

  3. Knots in Charged Polymers

    Condensed Matter (arXiv)

    Paul G. Dommersnes; Yacov Kantor; Mehran Kardar

    2002-07-10

    The interplay of topological constraints and Coulomb interactions in static and dynamic properties of charged polymers is investigated by numerical simulations and scaling arguments. In the absence of screening, the long-range interaction localizes irreducible topological constraints into tight molecular knots, while composite constraints are factored and separated. Even when the forces are screened, tight knots may survive as local (or even global) equilibria, as long as the overall rigidity of the polymer is dominated by the Coulomb interactions. As entanglements involving tight knots are not easy to eliminate, their presence greatly influences the relaxation times of the system. In particular, we find that tight knots in open polymers are removed by diffusion along the chain, rather than by opening up. The knot diffusion coefficient actually decreases with its charge density, and for highly charged polymers the knot's position appears frozen.

  4. Chemistry in Bioinformatics

    University of Cambridge - Dspace

    Murray-Rust, Peter; Mitchell, John B O; Rzepa, Henry S

    2005-06-07

    chemistry to adopt new approaches. The benefits of open access include higher quality, greater availability, and development of the Biochemical Semantic Web where robots mine text and data as a basis for knowledge-driven science. We argue that funders... 2005, 6:141 http://www.biomedcentral.com/1471-2105/6/141 Unlike bioinformaticists, who routinely apply data- and text-mining tools in their research, conventional chemists appear culturally more suspicious of robotic data extrac- tion and continue...

  5. Polymers in disordered environments

    Condensed Matter (arXiv)

    V. Blavatska; N. Fricke; W. Janke

    2014-11-18

    A brief review of our recent studies aiming at a better understanding of the scaling behaviour of polymers in disordered environments is given. The main emphasis is on a simple generic model where the polymers are represented by (interacting) self-avoiding walks and the disordered environment by critical percolation clusters. The scaling behaviour of the number of conformations and their average spatial extent as a function of the number of monomers and the associated critical exponents $\\gamma$ and $\

  6. Branched Polymer Revisited

    HEP - Theory (arXiv)

    Hajime Aoki; Satoshi Iso; Hikaru Kawai; Yoshihisa Kitazawa

    1999-09-10

    We show that correlation functions for branched polymers correspond to those for $\\phi^3$ theory with a single mass insertion, not those for the $\\phi^3$ theory themselves, as has been widely believed. In particular, the two-point function behaves as 1/p^4, not as 1/p^2. This behavior is consistent with the fact that the Hausdorff dimension of the branched polymer is four.

  7. Engineering Polymer Informatics

    University of Cambridge - Dspace

    Adams, Nico; Ryder, Jennifer; Jessop, David M; Corbett, Peter; Murray-Rust, Peter

    2007-12-17

    compromises in terms of data management and property calculation obsolete. This will be done by • creating a polymer information model, which captures polymer related information in a granular way, using modern semantic web technologies. • developing new... specification of a shared conceptualization • developed in Web Ontology Language (OWL) • facilitates knowledge sharing • facilitates knowledge re-use • separation of declarative and procedural knowledge

  8. Smectic Polymer Vesicles

    Condensed Matter (arXiv)

    Lin Jia; Amin Cao; Daniel Levy; Bing Xu; Pierre-Antoine Albouy; Xiangjun Xing; Mark J. Bowick; Min-Hui Li

    2009-04-17

    Polymer vesicles are stable robust vesicles made from block copolymer amphiphiles. Recent progress in the chemical design of block copolymers opens up the exciting possibility of creating a wide variety of polymer vesicles with varying fine structure, functionality and geometry. Polymer vesicles not only constitute useful systems for drug delivery and micro/nano-reactors but also provide an invaluable arena for exploring the ordering of matter on curved surfaces embedded in three dimensions. By choosing suitable liquid-crystalline polymers for one of the copolymer components one can create vesicles with smectic stripes. Smectic order on shapes of spherical topology inevitably possesses topological defects (disclinations) that are themselves distinguished regions for potential chemical functionalization and nucleators of vesicle budding. Here we report on glassy striped polymer vesicles formed from amphiphilic block copolymers in which the hydrophobic block is a smectic liquid crystal polymer containing cholesteryl-based mesogens. The vesicles exhibit two-dimensional smectic order and are ellipsoidal in shape with defects, or possible additional budding into isotropic vesicles, at the poles.

  9. Interfacial thermal conductance in spun-cast polymer films and polymer brushes

    Materials Science Websites

    Braun, Paul

    Interfacial thermal conductance in spun-cast polymer films and polymer brushes Mark D. Losego inorganic materials and anharmonic polymers have potentially intriguing thermal transport behavior. The low thermal conductivity of amorphous polymers limits significant interfacial effects to polymer film

  10. "Our graduate programs in chemistry are innovative and forward thinking." carleton.ca/chemistry

    Biology and Medicine Websites

    Dawson, Jeff W.

    Chemistry n Inorganic Chemistry n Organic Chemistry n Physical Chemistry n Nanoscience n Food Science n"Our graduate programs in chemistry are innovative and forward thinking." carleton.ca/chemistry GRADUATE PROGRAMS IN SHAPE YOUR FUTURE BASED ON YOUR RESEARCH INTERESTS Chemistry affects almost all

  11. Theory for polymer coils with necklaces of micelles

    Condensed Matter (arXiv)

    Richard P. Sear

    1997-08-11

    If many micelles adsorb onto the same polymer molecule then they are said to form a necklace. A minimal model of such a necklace is proposed and shown to be almost equivalent to a 1-dimensional fluid with nearest-neighbour interactions. The thermodynamic functions of this fluid are obtained and then used to predict the change in the critical micellar concentration of the surfactant in the presence of the polymer. If the amount of polymer is not too large there are two critical micellar concentrations, one for micelles in necklaces and one for free micelles.

  12. A New Class of Chiral Conjugated Polymers with a Propeller-Like Structure

    Materials Science Websites

    Wu, Chi

    , Dilrushki Vitharana, Chi Wu, Chi Man Simon Kwan, and Lin Pu*, Departments of Chemistry, North Dakota State materials, "propeller" polymers, have been designed and synthesized. By using the transition metal catalyzed cross-coupling reactions including the coupling of terminal alkynes with aryl halides and the Suzuki

  13. Characterization of Polymer Monoliths Containing Embedded Nanoparticles by Scanning Transmission Xray Microscopy (STXM)

    Chemistry Websites

    Hitchcock, Adam P.

    . Hilder*, Australian Centre for Research on Separation Science (ACROSS), School of Chemistry, UniversityMaster University, Hamilton, ON L8S 4M1, Canada § Faculty of Health Sciences Electron Microscopy Facility, Mc of materials and therefore lead to a better understanding of the link between polymer morphology

  14. Modeling Diffusion of Adsorbed Polymer with Explicit Solvent Tapan G. Desai and Pawel Keblinski

    Physics Websites

    Granick, Steve

    Department of Materials Science and Engineering, Rensselaer Polytechnic Institute, Troy, New York, USA Sanat Granick Departments of Materials Science and Engineering, Chemistry, and Physics, University of Illinois are used to delineate the factors affecting the N dependence of the polymer lateral diffusion coefficient

  15. Department of Chemistry and Biochemistry CHEMISTRY 199: Campus/Departmental Safety Requirements

    Geosciences Websites

    Aluwihare, Lihini

    Department of Chemistry and Biochemistry CHEMISTRY 199: Campus/Departmental Safety Requirements Attach this form to your campus Chem199 application The Department of Chemistry and Biochemistry welcomes

  16. 100 years of physical chemistry a collection of landmark papers

    CERN Preprints

    Smith, Ian W M

    2003-01-01

    Compiled to celebrate the centenary of the founding of the Faraday Society in 1903, this collection presents some of the key papers published in Faraday journals over the past one hundred years. The feature articles were all written by leaders in their field, including a number of Nobel Prize winners such as Lord George Porter and John Pople, and cover a breadth of topics demonstrating the wide range of scientific fields which the Faraday Society, and now the RSC Faraday Division, seek to promote. Topics include: Intermolecular Forces; Ultrafast Processes; Astrophysical Chemistry; Polymers; an

  17. Quantum chemistry an introduction

    CERN Preprints

    Kauzmann, Walter

    2013-01-01

    Quantum Chemistry: An Introduction provides information pertinent to the fundamental aspects of quantum mechanics. This book presents the theory of partial differentiation equations by using the classical theory of vibrations as a means of developing physical insight into this essential branch of mathematics.Organized into five parts encompassing 16 chapters, this book begins with an overview of how quantum mechanical deductions are made. This text then describes the achievements and limitations of the application of quantum mechanics to chemical problems. Other chapters provide a brief survey

  18. Principles of quantum chemistry

    CERN Preprints

    George, David V

    2013-01-01

    Principles of Quantum Chemistry focuses on the application of quantum mechanics in physical models and experiments of chemical systems.This book describes chemical bonding and its two specific problems - bonding in complexes and in conjugated organic molecules. The very basic theory of spectroscopy is also considered. Other topics include the early development of quantum theory; particle-in-a-box; general formulation of the theory of quantum mechanics; and treatment of angular momentum in quantum mechanics. The examples of solutions of Schroedinger equations; approximation methods in quantum c

  19. Black Hole Chemistry

    CERN Preprints

    Kubiznak, David

    2014-01-01

    The mass of a black hole has traditionally been identified with its energy. We describe a new perspective on black hole thermodynamics, one that identifies the mass of a black hole with chemical enthalpy, and the cosmological constant as thermodynamic pressure. This leads to an understanding of black holes from the viewpoint of chemistry, in terms of concepts such as Van der Waals fluids, reentrant phase transitions, and triple points. Both charged and rotating black holes exhibit novel chemical-type phase behaviour, hitherto unseen.

  20. Black Hole Chemistry

    General Relativity & Quantum Cosmology (arXiv)

    David Kubiznak; Robert B. Mann

    2014-04-08

    The mass of a black hole has traditionally been identified with its energy. We describe a new perspective on black hole thermodynamics, one that identifies the mass of a black hole with chemical enthalpy, and the cosmological constant as thermodynamic pressure. This leads to an understanding of black holes from the viewpoint of chemistry, in terms of concepts such as Van der Waals fluids, reentrant phase transitions, and triple points. Both charged and rotating black holes exhibit novel chemical-type phase behaviour, hitherto unseen.

  1. CHEMISTRY | CH 101 AND CH 102 The Department of Chemistry requires that all students demonstrate their chemistry background before

    Materials Science Websites

    Velev, Orlin D.

    CHEMISTRY | CH 101 AND CH 102 The Department of Chemistry requires that all students demonstrate their chemistry background before being allowed to enroll in CH 101 ­ Chemistry: A Molecular Science. Most students are required to demonstrate their preparation for CH 101 with the NC State Chemistry Placement

  2. The Polymer Bouncer

    Quantum Physics (arXiv)

    A. Martin-Ruiz; A. Frank; L. F. Urrutia

    2015-05-31

    Polymer Quantization (PQ) is a background independent quantization scheme that is deployed in Loop Quantum Gravity. This framework leads to a new short-distance (discretized) structure characterized by a fundamental length. In this paper we use PQ to analyze the problem of a particle bouncing on a perfectly reflecting surface under the influence of Earth's gravitational field, what we have called "\\textit{The Polymer Bouncer}". In this scenario, deviations from the usual quantum effects are induced by the spatial discreteness, but not by a new short-range gravitational interaction. We solve the polymer Schr\\"odinger equation in an analytical fashion, and we evaluate numerically the corresponding energy levels. We find that the polymer energy spectrum exhibits a negative shift compared to the obtained for the quantum bouncer. The comparison of our results with those obtained in the GRANIT experiment leads to an upper bound for the fundamental length scale, namely $\\lambda \\ll 0.6 \\buildrel _{\\circ} \\over {\\mathrm{A}}$. We find polymer corrections to the probability of transitions between levels, induced by small vibrations, together with the probability of spontaneous emission in the quadrupole approximation.

  3. Effect of polymer-polymer interactions on the surface tension of colloid-polymer mixtures

    Condensed Matter (arXiv)

    A. Moncho-Jorda; B. Rotenberg; A. A. Louis

    2003-09-10

    The density profile and surface tension for the interface of phase-separated colloid-polymer mixtures have been studied in the framework of the square gradient approximation for both ideal and interacting polymers in good solvent. The calculations show that in the presence of polymer-polymer excluded volume interactions the interfaces have lower widths and surface tensions compared to the case of ideal polymers. These results are a direct consequence of the shorter range and smaller depth of the depletion potential between colloidal particles induced by interacting polymers.

  4. Noteworthy Chemistry May 25, 2009

    Chemistry Websites

    Qi, Limin

    of profens A polymer membrane protects anticancer drugs from premature release Nile blue chemical sensors­640; José C. Barros) Back to Top A polymer membrane protects anticancer drugs from premature release. In cancer research, emulsion-based drugs and drug carriers are attractive because of their compatibility

  5. Electrodeposition of conducting polymer fibers

    MIT - DSpace

    Chen, Angela Y. (Angela Ying-Ju), 1982-

    2004-01-01

    Conducting polymers are materials that possess the electrical conductivity of metals while still retaining the mechanical properties such as flexibility of traditional polymers. Polypyrrole (PPy) is one of the more commonly ...

  6. Branched Polymers and Hyperplane Arrangements

    MIT - DSpace

    Postnikov, Alexander

    We generalize the construction of connected branched polymers and the notion of the volume of the space of connected branched polymers studied by Brydges and Imbrie (Ann Math, 158:1019–1039, 2003), and Kenyon and Winkler ...

  7. Colloid-Induced Polymer Compression

    Condensed Matter (arXiv)

    A. R. Denton; M. Schmidt

    2003-02-28

    We consider a model mixture of hard colloidal spheres and non-adsorbing polymer chains in a theta solvent. The polymer component is modelled as a polydisperse mixture of effective spheres, mutually noninteracting but excluded from the colloids, with radii that are free to adjust to allow for colloid-induced compression. We investigate the bulk fluid demixing behaviour of this model system using a geometry-based density-functional theory that includes the polymer size polydispersity and configurational free energy, obtained from the exact radius-of-gyration distribution for an ideal (random-walk) chain. Free energies are computed by minimizing the free energy functional with respect to the polymer size distribution. With increasing colloid concentration and polymer-to-colloid size ratio, colloidal confinement is found to increasingly compress the polymers. Correspondingly, the demixing fluid binodal shifts, compared to the incompressible-polymer binodal, to higher polymer densities on the colloid-rich branch, stabilizing the mixed phase.

  8. Fluctuations of ring polymers

    Condensed Matter (arXiv)

    Shlomi Medalion; Erez Aghion; Hagai Meirovitch; Eli Barkai; David A. Kessler

    2015-01-25

    We present an exact solution for the distribution of sample averaged monomer to monomer distance of ring polymers. For non-interacting and weakly-interacting models these distributions correspond to the distribution of the area under the reflected Bessel bridge and the Bessel excursion respectively, and are shown to be identical in dimension d greater or equal 2. A symmetry of the problem reveals that dimension d and 4 minus d are equivalent, thus the celebrated Airy distribution describing the areal distribution of the one dimensional Brownian excursion describes also a polymer in three dimensions. For a self-avoiding polymer in dimension d we find numerically that the fluctuations of the scaled averaged distance are nearly identical in dimensions 2 and 3, and are well described to a first approximation by the non-interacting excursion model in dimension 5.

  9. Fluctuations of ring polymers

    CERN Preprints

    Medalion, Shlomi; Meirovitch, Hagai; Barkai, Eli; Kessler, David A

    2015-01-01

    We present an exact solution for the distribution of sample averaged monomer to monomer distance of ring polymers. For non-interacting and weakly-interacting models these distributions correspond to the distribution of the area under the reflected Bessel bridge and the Bessel excursion respectively, and are shown to be identical in dimension d greater or equal 2. A symmetry of the problem reveals that dimension d and 4 minus d are equivalent, thus the celebrated Airy distribution describing the areal distribution of the one dimensional Brownian excursion describes also a polymer in three dimensions. For a self-avoiding polymer in dimension d we find numerically that the fluctuations of the scaled averaged distance are nearly identical in dimensions 2 and 3, and are well described to a first approximation by the non-interacting excursion model in dimension 5.

  10. Polydisperse star polymer solutions

    Condensed Matter (arXiv)

    Christian von Ferber; Arben Jusufi; Martin Watzlawek; Christos N. Likos; Hartmut Lowen

    2000-07-31

    We analyze the effect of polydispersity in the arm number on the effective interactions, structural correlations and the phase behavior of star polymers in a good solvent. The effective interaction potential between two star polymers with different arm numbers is derived using scaling theory. The resulting expression is tested against monomer-resolved molecular dynamics simulations. We find that the theoretical pair potential is in agreement with the simulation data in a much wider polydispersity range than other proposed potentials. We then use this pair potential as an input in a many-body theory to investigate polydispersity effects on the structural correlations and the phase diagram of dense star polymer solutions. In particular we find that a polydispersity of 10%, which is typical in experimental samples, does not significantly alter previous findings for the phase diagram of monodisperse solutions.

  11. Elastic Lattice Polymers

    Condensed Matter (arXiv)

    Marco Baiesi; Gerard T. Barkema; Enrico Carlon

    2010-06-15

    We study a model of "elastic" lattice polymer in which a fixed number of monomers $m$ is hosted by a self-avoiding walk with fluctuating length $l$. We show that the stored length density $\\rho_m = 1 - /m$ scales asymptotically for large $m$ as $\\rho_m=\\rho_\\infty(1-\\theta/m + ...)$, where $\\theta$ is the polymer entropic exponent, so that $\\theta$ can be determined from the analysis of $\\rho_m$. We perform simulations for elastic lattice polymer loops with various sizes and knots, in which we measure $\\rho_m$. The resulting estimates support the hypothesis that the exponent $\\theta$ is determined only by the number of prime knots and not by their type. However, if knots are present, we observe strong corrections to scaling, which help to understand how an entropic competition between knots is affected by the finite length of the chain.

  12. Chemistry 687: Statistical Mechanics and Chemistry Syllabus: Spring 2015

    Materials Science Websites

    Weeks, John D.

    the homework since statistical mechanics and thermodynamics in particular are subtle, and students often feelChemistry 687: Statistical Mechanics and Chemistry Syllabus: Spring 2015 Instructor: Prof. John D to Modern Statistical Mechanics - D. Chandler ISBN: 0195042778 Other suggested texts: (2) Introduction

  13. CHEMISTRY 213B: Introductory Physical Chemistry I. General Information

    Physics Websites

    Ronis, David M.

    Chemistry. Supplementary Texts 1. P. A. Rock, Chemical Thermodynamics. 2. Gordon M. Barrow, Physical Chemistry. 3. R. Kubo, Thermodynamics (Physics orientation, advanced) Grades There will be approximately one Text Chapter Lecture 1. Introduction: Thermodynamics, an overview 2 Lecture 2. Empirical properties

  14. Physical Chemistry II Spring 2007 Physical Chemistry II

    Chemistry Websites

    Physical Chemistry II Spring 2007 Physical Chemistry II Chem 390 Syllabus www.chem.cornell.edu/gse1 Chapter 19 Heat, work, and thermodynamic energy. The First Law and chemical reactions. III. Entropy. Entropy and spontaneity. Calculation and measurement of entropy changes. IV. Free energy and spontaneity

  15. 4 Chemistry4 Chemistry Spring 2000 Chemists Shed Light on

    Chemistry Websites

    Suslick, Kenneth S.

    , we can create small hot spots with temperatures as high as a star surface, pressures as great4 Chemistry4 Chemistry Spring 2000 newsblast Chemists Shed Light on Temperatures of Bubbly these fiery but fleeting temperatures by borrowing a technique from astronomers. When such ultrasound

  16. Chemistry Major and Minor At A Glance

    Chemistry Websites

    Vertes, Akos

    Chemistry Major and Minor At A Glance Major I ­ Pre-professional (Medicine, Dentistry, Business, Law, Engineering) Major II ­ ACS Certified e.g. Graduate Study or Entry Level Chemistry Employment. Major III ­ Forensic Chemistry Major IV** ­ Biochemistry Option Chemistry Minor General Chemistry I & II

  17. Department of Chemistry and Chemical Biology

    Environmental Sciences and Ecology Websites

    Vetriani, Costantino

    Department of Chemistry and Chemical Biology Jersey Roots, Global Reach #12;Rutgers New Brunswick of Engineering #12;Chemistry Department Research - Focus Areas Catalysis and Inorganic Chemistry Biological and Biophysical Chemistry Molecular Design and Synthesis Nano and Materials Chemistry Energy and Environment

  18. DIVISION OF MARINE AND ATMOSPHERIC CHEMISTRY

    Computer Technologies and Information Sciences Websites

    Shyu, Mei-Ling

    DIVISION OF MARINE AND ATMOSPHERIC CHEMISTRY The missions of the Division of Marine and Atmospheric Chemistry (MAC) are to carry out broadly based research on the chemistry of the atmosphere and marine and stratosphere. Atmospheric Chemistry Research activities in atmospheric chemistry and modeling are diverse

  19. 165Department of Chemistry Undergraduate Catalogue 201516

    Engineering Websites

    and theories across the four major areas of chemistry, i.e. analytical, organic, inorganic and physical165Department of Chemistry Undergraduate Catalogue 2015­16 Department of Chemistry Chairperson in Chemistry Mission Statement The Chemistry Department provides liberal arts and professional education

  20. Medicinal Chemistry & PharmacologyMedicinal Chemistry & Pharmacology Graduate Gateway ProgramGraduate Gateway Program

    Biology and Medicine Websites

    Rose, Michael R.

    Medicinal Chemistry & PharmacologyMedicinal Chemistry & Pharmacology Graduate Gateway Program ..................................................................................... 16 #12;Student Handbook 15/16 3 Welcome New Graduate Students Welcome to the Medicinal Chemistry chosen "home" de partment--Chemistry, Pharmacology, Pharmaceutical Sciences, or Molecular Biology & Bio

  1. Relaxation of a Single Knotted Ring Polymer

    Condensed Matter (arXiv)

    Shinya Saka; Hiroshi Takano

    2008-06-10

    The relaxation of a single knotted ring polymer is studied by Brownian dynamics simulations. The relaxation rate lambda_q for the wave number q is estimated by the least square fit of the equilibrium time-displaced correlation function to a double exponential decay at long times. The relaxation rate distribution of a single ring polymer with the trefoil knot appears to behave as lambda_q=A(1/N^)x for q=1 and lambda_q=A'(q/N)^x' for q=2 and 3, where x=2.61, x'=2.02 and A>A'. The wave number q of the slowest relaxation rate for each N is given by q=2 for small values of N, while it is given by q=1 for large values of N. This crossover corresponds to the change of the structure of the ring polymer caused by the localization of the knotted part to a part of the ring polymer.

  2. Strongly Charged Polymer Brushes

    Condensed Matter (arXiv)

    Ben O'Shaughnessy; Qingbo Yang

    2005-08-10

    Charged polymer brushes are layers of surface-tethered chains. Experimental systems are frequently strongly charged. Here we calculate phase diagrams for such brushes in terms of salt concentration n_s, grafting density and polymer backbone charge density. Electrostatic stiffening and counterion condensation effects arise which are absent from weakly charged brushes. In various phases chains are locally or globally fully stretched and brush height H has unique scaling forms; at higher salt concentrations we find H ~ n_s^(-1/3), in good agreement with experiment.

  3. Irreversibility and Polymer Adsorption

    Condensed Matter (arXiv)

    Ben O'Shaughnessy; Dimitrios Vavylonis

    2002-12-05

    Physisorption or chemisorption from dilute polymer solutions often entails irreversible polymer-surface bonding. We present a theory of the non-equilibrium layers which result. While the density profile and loop distribution are the same as for equilibrium layers, the final layer comprises a tightly bound inner part plus an outer part whose chains make only fN surface contacts where N is chain length. The contact fractions f follow a broad distribution, P(f) ~ f^{-4/5}, in rather close agreement with strong physisorption experiments [H. M. Schneider et al, Langmuir v.12, p.994 (1996)].

  4. BRANCHED POLYMERS AND HYPERPLANE ARRANGEMENTS

    Mathematics Websites

    Postnikov, Alexander

    BRANCHED POLYMERS AND HYPERPLANE ARRANGEMENTS KAROLA M´ESZ´AROS ALEXANDER POSTNIKOV Abstract. We of connected branched polymers studied by Brydges and Imbrie [BI], and Kenyon and Winkler [KW] to any hyperplane arrangement A. The volume of the resulting configuration space of connected branched polymers

  5. LEHIGH UNIVERSITY EMULSION POLYMERS INSTITUTE

    Materials Science Websites

    Gilchrist, James F.

    LEHIGH UNIVERSITY EMULSION POLYMERS INSTITUTE LIAISON PROGRAM MEMBERSHIP APPLICATION AND AGREEMENT This Application and Agreement for Liaison Program Membership in the Emulsion Polymers Institute (EPI) at Lehigh Coordinator: The University coordinator of the Emulsion Polymers Institute's Industrial Liaison Program is Dr

  6. Organic Photovoltaics: An Early Innovator Michael McGehee and the Chemistry of Materials' 1k Club

    Materials Science Websites

    McGehee, Michael

    Organic Photovoltaics: An Early Innovator Michael McGehee and the Chemistry of Materials' 1k Club "Conjugated Polymer Photovoltaic Cells", with graduate student Kevin M. Coakley.1 It was still very early for organic photovoltaics (OPV), and this review became the "go-to" article that drew together what was known

  7. Benchtop chemistry for the rapid prototyping of label-free biosensors: Transmission localized surface plasmon resonance platforms

    Materials Science Websites

    Benchtop chemistry for the rapid prototyping of label-free biosensors: Transmission localized for the detection of biomolecules. We have recently demonstrated a rapid prototyping ap- proach for the fabrication,12,21­23 This in- cludes protein binding assays,13,14,17,18,31 DNA hybridization assays,32,33 as well as polymer

  8. Ocean Chemistry and Ecosystems Division

    Geosciences Websites

    by the burning of fossil fuels. · Ocean Acidification: Understanding the process of ocean acidificationOcean Chemistry and Ecosystems Division July 2015 Atlantic Oceanographic and Meteorological. Cover photograph: Backreef of Mo'orea, French Polynesia, by Lauren Valentino (2013). #12;Ocean Chemistry

  9. Department of Chemistry Undergraduate Thesis

    Chemistry Websites

    Kounaves, Samuel P.

    must be majoring in chemistry, biochemistry, or chemical physics. 4. Application of admission and that progress toward the thesis is satisfactory). March: Schedule the thesis defense with the committee. Reserve a room with the Chemistry office and give them a title. The defense is public, announced by the office

  10. Student Orientation Guide Organic Chemistry

    Environmental Management and Restoration Websites

    Alvarez-Cohen, Lisa

    to a discussion forum Complete quizzes and lab final 6. Students with Disabilities If you are requiring courseStudent Orientation Guide CHEM N3AL Organic Chemistry June 22-August 14, 2015 Organic Chemistry Update Your Personal Setting and Profile Picture How to Use Announcements, Discussions and Conversations

  11. CLOUD CHEMISTRY STEPHEN E. SCHWARTZ

    Environmental Sciences and Ecology Websites

    Schwartz, Stephen E.

    in cirrus clouds and in polar stratospheric clouds. For condensed-phase amounts substantially exceeding I gBNL-68172 CHAPTER 17 CLOUD CHEMISTRY STEPHEN E. SCHWARTZ 1 INTRODUCTION Tbe term cloud chemistry is considered bere to comprise both cloud composition and reactions that take place in clouds. Clouds are a very

  12. Chemistry 2B Laboratory Manual

    Chemistry Websites

    Guo, Ting

    _______________________ Laboratory Room Number _______________________ Dispensary Room Number 1060 Sciences Lab Building Location _______________________ #12;i Preface Chemistry is an experimental science. Thus, it is important that students of chemistry the student in the study of the science by clearly illustrating the principles and concepts involved. Finally

  13. Chemistry 2A Laboratory Manual

    Chemistry Websites

    Guo, Ting

    _______________________ Laboratory Room Number _______________________ Dispensary Room Number 1060 Sciences Lab Building Location _______________________ #12;i Preface Chemistry is an experimental science. Thus, it is important that students of chemistry the student in the study of the science by clearly illustrating the principles and concepts involved. Finally

  14. Chemistry 2C Laboratory Manual

    Chemistry Websites

    Guo, Ting

    _______________________ Laboratory Room Number _______________________ Dispensary Room Number 1060 Sciences Lab Building Location _______________________ #12;i Preface Chemistry is an experimental science. Thus, it is important that students of chemistry the student in the study of the science by clearly illustrating the principles and concepts involved. Finally

  15. COURSE GUIDE PHYSICAL CHEMISTRY II

    Chemistry Websites

    Dibble, Theodore

    COURSE GUIDE FOR PHYSICAL CHEMISTRY II FCH 361 Spring 2011 State University of New York College-2011 Acknowledgments This course guide is based on the ones I developed for FCH 360, Physical Chemistry I. The inspiration for those course guides came largely from Chuck Spuches of the Instructional Development

  16. A Statistical Theory of cosolvent-induced coil-globule transitions in dilute polymer solution

    Condensed Matter (arXiv)

    Yu. A. Budkov; A. L. Kolesnikov; N. Georgi; M. G. Kiselev

    2014-11-07

    We present a statistical model of a dilute polymer solution in good solvent in the presence of low-molecular weight cosolvent. We investigate the conformational changes of the polymer induced by a change of the cosolvent concentration and the type of interaction between the cosolvent and the polymer. We describe the polymer in solution by the Edwards model, where the partition function of the polymer chain with a fixed radius of gyration is described in the framework of the mean-field approximation. The contributions of polymer-cosolvent and the cosolvent-cosolvent interactions in the total Helmholtz free energy are treated also within the mean-field approximation. For convenience we separate the system volume on two parts: the volume occupied by the polymer chain expressed through its gyration volume and the bulk solution. Considering the equilibrium between the two subvolumes we obtain the total Helmholtz free energy of the solution as a function of radius of gyration and the cosolvent concentration within gyration volume. After minimization of the total Helmholtz free energy with respect to its arguments we obtain a system of coupled equations with respect to the radius of gyration of the polymer chain and the cosolvent concentration within the gyration volume. Varying the interaction strength between polymer and cosolvent we show that the polymer collapse occurs in two cases - either when the interaction between polymer and cosolvent is repulsive or when the interaction is attractive. The reported effects could be relevant for different disciplines where conformational transitions of macromolecules in the presence of a cosolvent are of interest, in particular in biology, chemistry and material science.

  17. UNIVERSITY OF OTTAWA Materials Chemistry and Physics

    Materials Science Websites

    UNIVERSITY OF OTTAWA Materials Chemistry and Physics As part of a major expansion of its research programs in Materials Chemistry and Physics intensity in the natural and health sciences. The Departments of Chemistry

  18. Chemistry 365: Quiz I (2007) David Ronis

    Physics Websites

    Ronis, David M.

    2007-01-01

    Chemistry 365: Quiz I (2007) © David Ronis McGill University Chemistry 365: Quiz I (2007) Useful correspond? February 7, 2007 Over... #12;Chemistry 365 -2- Quiz I (2007) b) All other things being equal

  19. Programme and Module BSc Chemistry and Maths

    Chemistry Websites

    Rzepa, Henry S.

    Programme and Module Handbook 2014-2015 BSc Chemistry and Maths BSc Natural Sciences MNatSc, BSc Natural Sciences Including International and Industrial variants School of Chemistry FACULTY ........................................................................................................... 3 BSc Chemistry & Maths

  20. [NiFeSe]-Hydrogenase Chemistry

    University of Cambridge - Dspace

    Wombwell, Claire; Caputo, Christine A.; Reisner, Erwin

    2015-10-21

    in exploring the unique ‘chemistry of [NiFeSe]-hydrogenases’ through biomimetic model chemistry and the ‘chemistry with [NiFeSe]-hydrogenases’ in semi-artificial, photosynthetic systems. We gain perspective from the structural, spectroscopic...

  1. Graduate Programs in Chemistry and Biochemistry

    Engineering Websites

    Huang, Haiying

    Graduate Programs in Chemistry and Biochemistry 2014 2015 #12;IInnttrroodduuccttiioonn Welcome to the Department of Chemistry and Biochemistry at the University of Texas at Arlington. We and training activities in many areas of chemistry and biochemistry. Our stateoftheart research

  2. Faculty of Science Chemistry and Physics

    Physics Websites

    the Chemistry and Biochemistry Association and the Physics Club. Free tutoring for first year courses.uwindsor.ca/outstandingscholars. Department of Chemistry and Biochemistry also offers ChemistryResearch Internships (10 per year). The goal

  3. Montana State University 1 Department of Chemistry

    Environmental Sciences and Ecology Websites

    Maxwell, Bruce D.

    background, including general, analytical, organic, and physical chemistry courses; Mathematics through to demonstrate proficiency in three of the six chemistry areas (analytical, biochemical, inorganic, organicMontana State University 1 Department of Chemistry and Biochemistry Departmental Office

  4. Montana State University 1 Chemistry and Biochemistry

    Environmental Sciences and Ecology Websites

    Maxwell, Bruce D.

    , biochemistry, inorganic, organic and physical. The Department of Chemistry and Biochemistry participatesMontana State University 1 Chemistry and Biochemistry Note: MSU's programs of Biology. For additional options see Biological Sciences at MSU. Department of Chemistry and Biochemistry

  5. CHEMISTRY 1060 CHEMICAL STRUCTURE and REACTIVITY

    Chemistry Websites

    Simons, Jack

    Ligand replacement, trans effect #12; Organic Chemistry: NomenclatureCHEMISTRY 1060 CHEMICAL STRUCTURE and REACTIVITY A Summer Program for high-ability High School Students who have completed a one year high school honor's chemistry

  6. The passive polymer problem

    Nonlinear Sciences (arXiv)

    Kay Joerg Wiese

    2000-07-07

    In this article, we introduce a generalization of the diffusive motion of point-particles in a turbulent convective flow with given correlations to a polymer or membrane. In analogy to the passive scalar problem we call this the passive polymer or membrane problem. We shall focus on the expansion about the marginal limit of velocity-velocity correlations which are uncorrelated in time and grow with the distance x as |x|^epsilon, and epsilon small. This relation gets modified for polymers and membranes (the marginal advecting flow has correlations which are shorter ranged.) The construction is done in three steps: First, we reconsider the treatment of the passive scalar problem using the most convenient treatment via field theory and renormalization group. We explicitly show why IR-divergences and thus the system-size appear in physical observables. In a second step, we reformulate the problem in terms of a Langevin equation. This is not only interesting in its own, but also gives an efficient algorithm to determine S^{2n} numerically. In a third and final step, we generalize the Langevin treatment of a particle to polymers and membranes, or more generally to an elastic object of inner dimension D with 0 <= D <= 2. These objects can intersect each other. We also analyze what happens when self-intersections are no longer allowed.

  7. Primordial polymer perturbations

    General Relativity & Quantum Cosmology (arXiv)

    Sanjeev S. Seahra; Iain A. Brown; Golam Mortuza Hossain; Viqar Husain

    2012-09-25

    We study the generation of primordial fluctuations in pure de Sitter inflation where the quantum scalar field dynamics are governed by polymer (not Schrodinger) quantization. This quantization scheme is related to, but distinct from, the structures employed in Loop Quantum Gravity; and it modifies standard results above a polymer energy scale $M_{\\star}$. We recover the scale invariant Harrison Zel'dovich spectrum for modes that have wavelengths bigger than $M_{\\star}^{-1}$ at the start of inflation. The primordial spectrum for modes with initial wavelengths smaller than $M_{\\star}^{-1}$ exhibits oscillations superimposed on the standard result. The amplitude of these oscillations is proportional to the ratio of the inflationary Hubble parameter $H$ to the polymer energy scale. For reasonable choices of $M_{\\star}$, we find that polymer effects are likely unobservable in CMB angular power spectra due to cosmic variance uncertainty, but future probes of baryon acoustic oscillations may be able to directly constrain the ratio $H/M_{\\star}$.

  8. Sedimentation of Knotted Polymers

    Condensed Matter (arXiv)

    Joonas Piili; Davide Marenduzzo; Kimmo Kaski; Riku Linna

    2012-12-20

    We investigate the sedimentation of knotted polymers by means of stochastic rotation dynamics, a molecular dynamics algorithm that takes hydrodynamics fully into account. We show that the sedimentation coefficient s, related to the terminal velocity of the knotted polymers, increases linearly with the average crossing number n_c of the corresponding ideal knot. To the best of our knowledge, this provides the first direct computational confirmation of this relation, postulated on the basis of experiments in "The effect of ionic conditions on the conformations of supercoiled DNA. I. sedimentation analysis" by Rybenkov et al., for the case of sedimentation. Such a relation was previously shown to hold with simulations for knot electrophoresis. We also show that there is an accurate linear dependence of s on the inverse of the radius of gyration R_g^-1, more specifically with the inverse of the R_g component that is perpendicular to the direction along which the polymer sediments. When the polymer sediments in a slab, the walls affect the results appreciably. However, R_g^-1 remains to a good precision linearly dependent on n_c. Therefore, R_g^-1 is a good measure of a knot's complexity.

  9. Statistical mechanics of semiflexible polymers

    Condensed Matter (arXiv)

    Semjon Stepanow

    2004-03-23

    We present the statistical-mechanical theory of semiflexible polymers based on the connection between the Kratky-Porod model and the quantum rigid rotator in an external homogeneous field, and treatment of the latter using the quantum mechanical propagator method. The expressions and relations existing for flexible polymers can be generalized to semiflexible ones, if one replaces the Fourier-Laplace transform of the end-to-end polymer distance, $1/(k^{2}/3+p)$, through the matrix $\\tilde{P}(k,p)=(I+ikDM)^{-1}D$, where $D$ and $M$ are related to the spectrum of the quantum rigid rotator, and considers an appropriate matrix element of the expression under consideration. The present work provides also the framework to study polymers in external fields, and problems including the tangents of semiflexible polymers. We study the structure factor of the polymer, the transversal fluctuations of a free end of the polymer with fixed tangent of another end, and the localization of a semiflexible polymer onto an interface. We obtain the partition function of a semiflexible polymer in half space with Dirichlet boundary condition in terms of the end-to-end distribution function of the free semiflexible polymer, study the behaviour of a semiflexible polymer in the vicinity of a surface, and adsorption onto a surface.

  10. AFSTUDEEROPDRACHT Versnellen van Computational Quantum Chemistry

    Mathematics Websites

    Vuik, Kees

    AFSTUDEEROPDRACHT Versnellen van Computational Quantum Chemistry softwarepakket ADF m.b.v. GPU's Achtergrond Computational Chemistry houdt zich bezig met het voorspellen en begrijpen van chemische processen

  11. Different pretreatment chemistry/residence time combinations

    Renewable Energy Websites

    · Different pretreatment chemistry/residence time combinations are possible using these multiple pretreatment system for a wide range of pretreatment chemistries Integrated Biorefinery Research Facility

  12. Coarse-graining polymers as soft colloids

    Condensed Matter (arXiv)

    A. A. Louis; P. G. Bolhuis; R. Finken; V. Krakoviack; E. J. Meijer; J. P. Hansen

    2001-12-06

    We show how to coarse grain polymers in a good solvent as single particles, interacting with density-independent or density-dependent interactions. These interactions can be between the centres of mass, the mid-points or end-points of the polymers. We also show how to extend these methods to polymers in poor solvents and mixtures of polymers. Treating polymers as soft colloids can greatly speed up the simulation of complex many-polymer systems, including polymer-colloid mixtures.

  13. 3. Advanced Polymer Molecular Science

    Computer Technologies and Information Sciences Websites

    Duh, Kevin

    . The Frontline of Fine Synthetic Technology Synthetic Organic Chemistry #12;13. Next-generation Photonic Creation through Precursor Methods Photofunctional Organic Chemistry 16. Effects on Multi Exciton and Biophysics 10. Bio-functional Control and Nano Science Achieved through Supramolecular Chemistry

  14. Elasticity of flexible polymers under cylindrical confinement: appreciating the blob scaling regime in

    Physics Websites

    Jeong, Hawoong

    Elasticity of flexible polymers under cylindrical confinement: appreciating the blob scaling regime much renewed interest in cylindrically confined polymers with linear or nonlinear topology, often the diameter of the cylindrical space. If the blob-scaling approach produces a ¼ 1 and g ¼ 2 À 1/n ¼ 1/3 with n

  15. Characterization of Polymer-Coated Glass as a Passive Air Sampler for

    Environmental Sciences and Ecology Websites

    Gobas, Frank

    Characterization of Polymer-Coated Glass as a Passive Air Sampler for Persistent Organic Pollutants University, Burnaby, British Columbia, Canada V5A 1S6 The use of thin-film polymer-coated glass surfaces of ethylene vinyl acetate (EVA) coated onto glass cylinders. The uptake was initially linear with time

  16. Virginia Tech Department of Chemistry Instructor Position / General Chemistry Program

    Biology and Medicine Websites

    entail teaching courses in analytical or physical chemistry lecture or lab as needed. Applicants should of teaching philosophy. Applicants should also arrange for two letters of recommendation to be submitted on

  17. Chemistry (ACS) College of Science CHEM-BSCHM

    Biotechnology Websites

    Kihara, Daisuke

    Chemistry (3)CHM34200 Inorganic Chemistry (1)CHM 34201 Inorganic Chemistry Lab (3)CHM37300 Physical Chemistry (3)CHM37400 Physical Chemistry (1)CHM37301 Physical Chemistry Lab (1)CHM37401 Physical ChemistryChemistry (ACS) College of Science CHEM-BSCHM CHMA 120 Credits 2.0 GPA in CHM courses and 2.0 GPA

  18. UNIVERSITY OF OREGON Physical Chemistry Faculty Position The Department of Chemistry and Biochemistry (http://chemistry.uoregon.edu)

    Chemistry Websites

    Cina, Jeff

    UNIVERSITY OF OREGON Physical Chemistry Faculty Position The Department of Chemistry and Biochemistry (http://chemistry.uoregon.edu) invites applications for a tenure-related position in experimental physical chemistry (broadly defined) beginning Fall 2015 at the anticipated rank of assistant professor

  19. Princeton -Department of ChemistryPrinceton -Department of Chemistry Princeton -Department of ChemistryDismukes Group Oliver R. Gothe

    Materials Science Websites

    Petta, Jason

    Princeton - Department of ChemistryPrinceton - Department of Chemistry Princeton - Department of ChemistryDismukes Group ­ Oliver R. Gothe August 8, 2007 Analysis of the Oxygen-evolving Mechanism+ Exchange Oliver R. Gothe University of Princeton Department of Chemistry Charles Dismukes Gennady Ananyev

  20. Sliding grafted polymer layers

    Condensed Matter (arXiv)

    Vladimir A. Baulin; Albert Johner; Carlos M. Marques

    2005-02-16

    We study theoretically the structure of sliding grafted polymer layers or SGP layers. These interfacial structures are built by attaching each polymer to the substrate with a ring-like molecule such as cyclodextrins. Such a topological grafting mode allows the chains to freely slide along the attachment point. Escape from the sliding link is prevented by bulky capping groups. We show that grafts in the mushroom regime adopt mainly symmetric configurations (with comparable branch sizes) while grafts in dense layers are highly dissymmetric so that only one branch per graft participates in the layer. Sliding layers on small colloids or star-like sliding micelles exhibit an intermediate behavior where the number of longer branches participating in the corona is independent of the total number of branches. This regime also exists for sliding surface-micelles comprising less chains but it is narrower.

  1. Are polymer melts "ideal"?

    Condensed Matter (arXiv)

    J. P. Wittmer; P. Beckrich; F. Crevel; C. C. Huang; A. Cavallo; T. Kreer; H. Meyer

    2006-10-13

    It is commonly accepted that in concentrated solutions or melts high-molecular weight polymers display random-walk conformational properties without long-range correlations between subsequent bonds. This absence of memory means, for instance, that the bond-bond correlation function, $P(s)$, of two bonds separated by $s$ monomers along the chain should exponentially decay with $s$. Presenting numerical results and theoretical arguments for both monodisperse chains and self-assembled (essentially Flory size-distributed) equilibrium polymers we demonstrate that some long-range correlations remain due to self-interactions of the chains caused by the chain connectivity and the incompressibility of the melt. Suggesting a profound analogy with the well-known long-range velocity correlations in liquids we find, for instance, $P(s)$ to decay algebraically as $s^{-3/2}$. Our study suggests a precise method for obtaining the statistical segment length \\bstar in a computer experiment.

  2. Scaling for a one-dimensional directed polymer with boundary conditions

    Mathematical Physics (arXiv)

    Timo Seppäläinen

    2015-08-26

    We study a (1+1)-dimensional directed polymer in a random environment on the integer lattice with log-gamma distributed weights. Among directed polymers, this model is special in the same way as the last-passage percolation model with exponential or geometric weights is special among growth models, namely, both permit explicit calculations. With appropriate boundary conditions, the polymer with log-gamma weights satisfies an analogue of Burke's theorem for queues. Building on this, we prove the conjectured values for the fluctuation exponents of the free energy and the polymer path, in the case where the boundary conditions are present and both endpoints of the polymer path are fixed. For the polymer without boundary conditions and with either fixed or free endpoint, we get the expected upper bounds on the exponents.

  3. Absorbable and biodegradable polymers

    CERN Preprints

    Shalaby, Shalaby W

    2003-01-01

    INTRODUCTION NOTES: Absorbable/Biodegradable Polymers: Technology Evolution. DEVELOPMENT AND APPLICATIONOF NEW SYSTEMS: Segmented Copolyesters with Prolonged Strength Retention Profiles. Polyaxial Crystalline Fiber-Forming Copolyester. Polyethylene Glycol-Based Copolyesters. Cyanoacrylate-Based Systems as Tissue Adhesives. Chitosan-Based Systems. Hyaluronic Acid-Based Systems. DEVELOPMENTS IN PREPARATIVE, PROCESSING, AND EVALUATION METHODS: New Approaches to the Synthesis of Crystalline. Fiber-Forming Aliphatic Copolyesters. Advances in Morphological Development to Tailor the Performance of Me

  4. Polymer Stretching by Turbulence

    Nonlinear Sciences (arXiv)

    Michael Chertkov

    2000-03-01

    The stretching of a polymer chain by a large scale chaotic flow is considered. The steady state which emerges as a balance of the turbulent stretching and anharmonic resistance of the chain is quantitatively described, i.e. the dependency on the flow parameters (Lyapunov exponent statistics) and the chain characteristics (the number of beads and the inter-bead elastic potential) is made explicit.

  5. Branched Polymers and Percolation

    Condensed Matter (arXiv)

    Peter Grassberger

    2000-08-30

    We study a supposed model for branched polymers which was shown in two dimensions to be in the universality class of ordinary percolation. We confirm this by high statistics simulations and show that it is in the percolation universality class also for three dimensions, in contrast to previous claims. These previous studies seem to have been mislead by huge corrections to scaling in this model.

  6. October 2000 CUME Organic Chemistry

    Chemistry Websites

    Glaser, Rainer

    --Columbia Saturday, October 7, 2000, @Nine O' Clock, 125I Chemistry Dr. Rainer Glaser Announced Reading: "Recent Cyc atom adds to the ketenimine to form a zwitterion. Next, the zwitterion is transformed

  7. DEPARTMENT OF CHEMISTRY INTEROFFICE MEMORANDUM

    Chemistry Websites

    Mossing, Mike

    , Assoc. Professor of Chemistry SUBJECT: Research substitution policy for Biochemistry Laboratory Credits for Undergraduate Biochemistry Majors DATE: AUGUST 8, 2008 CC: Whereas independent undergraduate research be substituted for the 2 credit requirement for Biochemistry Laboratory, provided the following 3 stipulations

  8. Palladium chemistry in chemical biology 

    Edinburgh, University of - Research Archive

    Yusop, Rahimi Muhammad

    2011-11-23

    A range of fluorescein derivatives were synthesised via Pd0-mediated cross-coupling chemistry of the mono triflate of fluorescein with a variety of boronic acids and the optical properties of each dye was studied. Among ...

  9. UNIVERSITY OF CALIFORNIA, SANTA CRUZ DEPARTMENT OF CHEMISTRY AND BIOCHEMISTRY

    Fission and Nuclear Technologies Websites

    California at Santa Cruz, University of

    specialty within chemistry and biochemistry (including general chemistry, organic chemistry, inorganicUNIVERSITY OF CALIFORNIA, SANTA CRUZ DEPARTMENT OF CHEMISTRY AND BIOCHEMISTRY Lecturer Pool The Department of Chemistry and Biochemistry at the University of California, Santa Cruz, invites applications

  10. Polymer Crowding and Shape Distributions in Polymer-Nanoparticle Mixtures

    Condensed Matter (arXiv)

    Wei Kang Lim; Alan R. Denton

    2014-10-24

    Macromolecular crowding can influence polymer shapes, which is important for understanding the thermodynamic stability of polymer solutions and the structure and function of biopolymers (proteins, RNA, DNA) under confinement. We explore the influence of nanoparticle crowding on polymer shapes via Monte Carlo simulations and free-volume theory of a coarse-grained model of polymer-nanoparticle mixtures. Exploiting the geometry of random walks, we model polymer coils as effective penetrable ellipsoids, whose shapes fluctuate according to the probability distributions of the eigenvalues of the gyration tensor. Accounting for the entropic cost of a nanoparticle penetrating a larger polymer coil, we compute the crowding-induced shift in the shape distributions, radius of gyration, and asphericity of ideal polymers in a theta solvent. With increased nanoparticle crowding, we find that polymers become more compact (smaller, more spherical), in agreement with predictions of free-volume theory. Our approach can be easily extended to nonideal polymers in good solvents and used to model conformations of biopolymers in crowded environments.

  11. Sedimentation of Knotted Polymers

    CERN Preprints

    Piili, Joonas; Kaski, Kimmo; Linna, Riku

    2012-01-01

    We investigate the sedimentation of knotted polymers by means of the stochastic rotation dynamics, a molecular dynamics algorithm which takes hydrodynamics fully into account. We show that the sedimentation coefficient s, related to the terminal velocity of the knotted polymers, increases linearly with the average crossing number n_c of the corresponding ideal knot. To the best of our knowledge, this provides the first direct computational confirmation of this relation, postulated on the basis of experiments in "The effect of ionic conditions on the conformations of supercoiled DNA. I. sedimentation analysis" by Rybenkov et al., for the case of sedimentation. Such a relation was previously shown to hold with simulations for knot electrophoresis. We also show that there is an accurate linear dependence of s on the inverse of the radius of gyration R_g^-1, more specifically with the inverse of the R_g component that is perpendicular to the direction along which the polymer sediments. Intriguingly, the linear de...

  12. ION CHEMISTRY 40 Years of

    Chemistry Websites

    Lineberger, W. Carl

    ION CHEMISTRY 40 Years of 9:30 to 10:30 am CU Wizard Show Cristol Chemistry Building Room 140 10:45 to 1:00 pm Poster Session University Memorial Center 2nd floor balcony and Room 235 11:30 to 1:00 pm to the Luncheon. 1:15 to 1:25 pm Group Photo University Memorial Center Fountain Steps 1:30 to 5:00 pm Symposium

  13. Polymer translocation induced by adsorption

    Condensed Matter (arXiv)

    Pyeong Jun Park; Wokyung Sung

    1998-02-10

    We study the translocation of a flexible polymer through a pore in a membrane induced by its adsorption on \\trans side of the membrane. When temperature $T$ is higher than $T_c$, the adsorption-desorption transition temperature, attractive interaction between polymer and membrane plays little role in affecting polymer conformation, leading to translocation time that scales as $\\tau\\sim L^3$ where $L$ is the polymer contour length. When $T < T_c$, however, the translocation time undergoes a sharp crossover to $\\tau\\sim L^2$ for sufficiently long polymers, following the second order conformational (adsorption) transition. The translocation time is found to exhibit the crossover around $T=T_c'$, which is lower than $T_c$ for polymers shorter than a critical length($N

  14. Atmospheric Chemistry and Physics Advisory Board Members

    Environmental Sciences and Ecology Websites

    Meskhidze, Nicholas

    Atmospheric Chemistry and Physics Advisory Board Members Paul J. Crutzen (Chairman) MPI for Chemistry Mainz, Germany air@mpch-mainz.mpg.de Meinrat O. Andreae MPI for Chemistry Mainz, Germany andreae for Chemistry Mainz, Germany poeschl@mpch-mainz.mpg.de Kenneth S. Carslaw Univ. Leeds, UK carslaw

  15. The Chemistry Clinic Knowledge exchange programme

    Materials Science Websites

    Strathclyde, University of

    The Chemistry Clinic Knowledge exchange programme The `Chemistry Clinic' is the new Knowledge Exchange (KE) programme in the Department of Pure & Applied Chemistry at the University of Strathclyde. It is a student-led service which provides opportunities for SMEs and larger companies to access chemistry

  16. Atmospheric Chemistry and Physics Advisory Board Members

    Environmental Sciences and Ecology Websites

    Meskhidze, Nicholas

    Atmospheric Chemistry and Physics Advisory Board Members Paul J. Crutzen (Chairman) MPI for Chemistry Mainz, Germany air@mpch-mainz.mpg.de Meinrat O. Andreae MPI for Chemistry Mainz, Germany andreae Executive Editor) MPI for Chemistry Mainz, Germany poeschl@mpch-mainz.mpg.de Kenneth S. Carslaw Univ. Leeds

  17. The College of Chemistry searches for solutions

    Materials Science Websites

    Yaghi, Omar M.

    The College of Chemistry searches for solutions Global Warming NewsJourna l CollegeofChemistry the ranks of alumni of our distinguished college. #12;the N e w s J o u r n a l CollegeofChemistry, University of California, Berkeley Spring2006,Volume14,iSSue1 Contents Dean's Desk 2 Chemistry News 4

  18. THE UNIVERSITY OF ARIZONA DEPARTMENT OF CHEMISTRY &

    Physics Websites

    Ziurys, Lucy M.

    THE UNIVERSITY OF ARIZONA DEPARTMENT OF CHEMISTRY & BIOCHEMISTRY GRADUATE HANDBOOK CHEMISTRY FALL 2012 #12;#12;TABLE OF CONTENTS A. General Description of the Chemistry Graduate Program Timeline. Continuous Enrollment 6. Leave of Absence G. Coursework for the Ph.D. Degree in Chemistry 1. Total Credits 2

  19. DCHABDepartment of Chemistry and Applied Biosciences

    Physics Websites

    Daraio, Chiara

    DCHABDepartment of Chemistry and Applied Biosciences 15.06.2015/me Head of Department Prof. Donald Chemistry (CH) MSc Chemistry (CH) Director of Studies: Prof. Donald Hilvert Student Administration: Ruth Advisor: Prof. Hansjörg Grützmacher Study Programmes Research Laboratory of Inorganic Chemistry Prof

  20. THE UNIVERSITY OF ARIZONA DEPARTMENT OF CHEMISTRY &

    Physics Websites

    Ziurys, Lucy M.

    THE UNIVERSITY OF ARIZONA DEPARTMENT OF CHEMISTRY & BIOCHEMISTRY GRADUATE HANDBOOK CHEMISTRY FALL 2014 #12;#12;TABLE OF CONTENTS A. General Description of the Chemistry Graduate Program B. Expectations. Continuous Enrollment 6. Leave of Absence G. Coursework for the Ph.D. Degree in Chemistry 1. Total Credits 2

  1. MILESTONES IN SOIL CHEMISTRY Donald L. Sparks

    Environmental Management and Restoration Websites

    Sparks, Donald L.

    MILESTONES IN SOIL CHEMISTRY Donald L. Sparks An array of pioneering research, dealing with various aspects of soil chemistry, has appeared in Soil Science for the past 90 years. In this review, two papers 2006;171:S47­S50) Key words: Soil chemistry, surface chemistry of soils, clay mineralogy. OVER the 90

  2. THE UNIVERSITY OF CHICAGO DEPARTMENT OF CHEMISTRY

    Biology and Medicine Websites

    Gardel, Margaret

    (including qualitative and quantitative analysis), one year of organic chemistry, and one year of physical, inorganic chemistry courses are defined as CHEM 301 - 311; organic chemistry courses are CHEM 320 - 33THE UNIVERSITY OF CHICAGO DEPARTMENT OF CHEMISTRY A GUIDE TO THE DEPARTMENTAL ACADEMIC

  3. THE UNIVERSITY OF CHICAGO DEPARTMENT OF CHEMISTRY

    Geosciences Websites

    (including qualitative and quantitative analysis), one year of organic chemistry, and one year of physical; organic chemistry courses are CHEM 321 - 336; physical chemistry courses are CHEM 361 - 388. Courses takenTHE UNIVERSITY OF CHICAGO DEPARTMENT OF CHEMISTRY A GUIDE TO THE DEPARTMENTAL ACADEMIC

  4. Eugene R. Zubarev Department of Chemistry

    Materials Science Websites

    Natelson, Douglas

    and supramolecular chemistry, molecular self-assembly, organic-inorganic hybrid structures, nanoparticle catalystsEugene R. Zubarev Department of Chemistry Rice University Houston, Texas 77005 Education Moscow State University Chemistry M. S., 1993 Russian Academy of Sciences Chemistry Ph.D., 1997 Professional

  5. Eugene R. Zubarev Department of Chemistry

    Materials Science Websites

    Natelson, Douglas

    of nanomaterials and supramolecular chemistry, molecular self-assembly, organic- inorganic hybrid structuresEugene R. Zubarev Department of Chemistry Rice University Houston, Texas 77005 Education Moscow State University Chemistry M. S., 1993 Russian Academy of Sciences Chemistry Ph.D., 1997 Professional

  6. 127Department of Chemistry Graduate Catalogue 201516

    Engineering Websites

    , inorganic, organic, or physical chemistry. Of the minimum 21 graduate course credits required for the MS chemistry; new methods for depollution of water contaminated by organic pollutants; photophysical127Department of Chemistry Graduate Catalogue 2015­16 Department of Chemistry Chairperson: Ghaddar

  7. Faculty of Science Chemistry and Physics

    Physics Websites

    Faculty of Science Chemistry and Physics Honours Chemistry and Physics is a good choice if you want to attack problems of a chemical nature with a solid understanding of the underlying physics. www.uwindsor.ca/chemistry Physical chemistry or chemical physics leads to the development of materials such as superconductors

  8. 179Department of Chemistry Undergraduate Catalogue 201415

    Engineering Websites

    the four major areas of chemistry, i.e. analytical, organic, inorganic and physical, and are strongly179Department of Chemistry Undergraduate Catalogue 2014­15 Department of Chemistry Chairperson: Karam, Pierre M. Instructors: Abi Rafi, Randa A.; Deeb, Hana H.; Sadek, Samar A. BS in Chemistry Mission

  9. 128 Department of Chemistry Graduate Catalogue 201415

    Engineering Websites

    , organic, or physical chemistry. Of the minimum 21 graduate course credits required for the MS degree in physical and biophysical chemistry; new methods for depollution of water contaminated by organic pollutants128 Department of Chemistry Graduate Catalogue 2014­15 Department of Chemistry Chairperson: Saliba

  10. Graduate Program Review Department of Chemistry and

    Multidisciplinary Databases and Resources Websites

    Olszewski Jr., Edward A.

    of chemistry such as inorganic, organic, computational, biochemistry and physical chemistry. We also offer1 Graduate Program Review Department of Chemistry and Biochemistry 2000-2007 #12;2 EXECUTIVE SUMMARY The chemistry graduate program accepted its first class with two M.S. seeking candidates

  11. Stepan Sklenak Department of Theoretical Chemistry

    Chemistry Websites

    Sklenak, Stepan

    Stepan Sklenak Department of Theoretical Chemistry J. Heyrovsky Institute of Physical Chemistry://www.jh-inst.cas.cz/~sklenak Current position: Senior Scientist, J. Heyrovsky Institute of Physical Chemistry, Prague, Czech Republic, Department of Pharmaceutical Chemistry, University of California San Francisco, San Francisco, CA, 2000

  12. A BRIEF HISTORY THE ANALYTICAL CHEMISTRY DIVISION

    Plasma Physics and Fusion Websites

    #12;#12;A BRIEF HISTORY THE ANALYTICAL CHEMISTRY DIVISION OF OAK RIDGE NATIONAL LABORATORY 1950 hiembers of the Chemistry Division R-on: J. A. Swartout In ra: Transfer of Personnel to Analytical Chemistry Division The following are transferred from ths Chemistry Division to tha newly constituted

  13. FACULTY EMPLOYMENT OPPORTUNITY DEPARTMENT OF CHEMISTRY

    Computer Technologies and Information Sciences Websites

    Ravikumar, B.

    OF CHEMISTRY (Tenure-Track) Assistant Professor Starting Mid-August 2016 Refer to 104029 on all correspondence from the Pacific Ocean. THE DEPARTMENT Majors in the Department of Chemistry may pursue a B.S. in chemistry, a B.S. in biochemistry (both certified by the American Chemical Society), or a B.A. in chemistry

  14. Faculty of Science Department of Chemistry

    Mathematics Websites

    Oyet, Alwell

    Faculty of Science Department of Chemistry Per-Course Appointment The Department of Chemistry chemistry course in the Winter 2016 semester. Subject to budgetary restrictions and sufficient enrolments and evaluation methods for all courses will be in accordance with the Department of Chemistry regulations

  15. Colorado School of Mines 1 Chemistry and

    Environmental Management and Restoration Websites

    (Chemistry; thesis and non-thesis options) · Doctor of Philosophy (Applied Chemistry) · Master of Science (Geochemistry; thesis) · Professional Masters in Environmental Geochemistry (non-thesis) · Doctor of Philosophy502 ADVANCED INORGANIC CHEMISTRY 3.0 CHGN503 ADV PHYSICAL CHEMISTRY I 4.0 CHGN505 ADVANCED ORGANIC

  16. Two Polymorphs of Cobalt(II) Imidazolate Polymers Synthesized Solvothermally by Using One Organic Template N,N-Dimethylacetamide

    Materials Science Websites

    Gao, Song

    Two Polymorphs of Cobalt(II) Imidazolate Polymers Synthesized Solvothermally by Using One Organic, Liaoning UniVersity, Shenyang 110036, and State Key Laboratory of Rare Earth Material Chemistry in that not only the same topological structure can be synthesized by using the different organic templates

  17. Coexistence of Spin-Canting, Metamagnetism, and Spin-Flop in a (4,4) Layered Manganese Azide Polymer

    Chemistry Websites

    Gao, Song

    Coexistence of Spin-Canting, Metamagnetism, and Spin-Flop in a (4,4) Layered Manganese Azide Polymer Xin-Yi Wang, Lu Wang, Zhe-Ming Wang, Gang Su, and Song Gao*, State Key Laboratory of Rare Earth Materials Chemistry and Applications & PKU-HKU Joint Laboratory on Rare Earth Materials and Bioinorganic

  18. Multiple time scale dynamics of distance fluctuations in a semiflexible polymer: A one-dimensional generalized Langevin equation treatment

    Biotechnology Websites

    Xie, Xiaoliang Sunney

    Multiple time scale dynamics of distance fluctuations in a semiflexible polymer: A one-dimensional generalized Langevin equation treatment Pallavi Debnath Department of Inorganic and Physical Chemistry, Indian of x t , modeled as the coordinate of a particle moving in a one-dimensional potential well in thermal

  19. Shapes of Semiflexible Polymer Rings

    Condensed Matter (arXiv)

    Karen Alim; Erwin Frey

    2008-02-07

    The shape of semiflexible polymer rings is studied over their whole range of flexibility. Investigating the joint distribution of asphericity and nature of asphericity as well as their respective averages we find two distinct shape regimes depending on the flexibility of the polymer. For small perimeter to persistence length the fluctuating rings exhibit only planar, elliptical configurations. At higher flexibilities three dimensional, crumpled structures arise. Analytic calculations for tight polymer rings confirm an elliptical shape in the stiff regime.

  20. Quantitative Study of Polymer Dynamics Through Hierarchical Multi-scale Dynamic Simulations

    Condensed Matter (arXiv)

    Vagelis A. Harmandaris; Kurt Kremer

    2008-09-09

    The long time dynamics of polymeric materials has been extensively studied in the past through various experimental techniques and computer simulations. While computer simulations typically treat generic, simplified models, experiments deal with specific chemistries. In this letter we present a hierarchical approach that combines atomistic and coarse-grained simulations to quantitatively study polymer dynamics. As an example we predict diffusion coefficients of atactic polystyrene melts of molecular weights relevant to polymer processing (up to 50kDa) without any adjustable parameter and compare the results to experiment.

  1. Chemistry Course Reading List * Physical Chemistry, P W Atkins, Oxford University Press (8th

    Computer Technologies and Information Sciences Websites

    Oxford, University of

    . 1985] Foundations of Organic Chemistry, Hornby & Peach, Oxford Chemistry Primer, OUP, 1996 * A Guide to Mechanism in Organic Chemistry, Sykes, Pearson (6th edn.),1986 Organic Chemistry, Maitland, Jones, Norton, rep. 1984 Organic Chemistry, Clayden, Greeves, Warren and Wothers, OUP *especially useful You may wish

  2. CHEMISTRY 2011 Academic regulations for the Bachelor's degree in Chemistry 2011

    Environmental Sciences and Ecology Websites

    Bataillon, Thomas

    CHEMISTRY 2011 Academic regulations for the Bachelor's degree in Chemistry 2011 1. Framework) in Chemistry. Academic line and main subject areas of the degree The Bachelor's degree in Chemistry students a basic introduction to the Chemistry disciplines. In addition, the Bachelor's degree programme

  3. Nitinol-reinforced shape-memory polymers

    MIT - DSpace

    Di Leo, Claudio V

    2010-01-01

    Reinforced shape-memory polymers have been developed from an acrylate based thermoset shape-memory polymer and nitinol wires. A rectangular shape-memory polymer measuring approximately 1 by 2 by 0.1 inches has a ten fold ...

  4. POLYMER PROGRAM SEMINAR "Polymer Approaches to Basic Questions in Biology"

    Materials Science Websites

    Alpay, S. Pamir

    POLYMER PROGRAM SEMINAR "Polymer Approaches to Basic Questions in Biology" Prof. Dennis E. Discher, biology is filled with remarkable polymeric structures that motivate mimicry with goals of both clarifying and exploiting biological principles. Filamentous viruses have inspired our development and computations of worm

  5. Polymers in a vacuum

    Condensed Matter (arXiv)

    J. M. Deutsch

    2007-06-13

    In a variety of situations, isolated polymer molecules are found in a vacuum and here we examine their properties. Angular momentum conservation is shown to significantly alter the average size of a chain and its conservation is only broken slowly by thermal radiation. The time autocorrelation for monomer position oscillates with a characteristic time proportional to chain length. The oscillations and damping are analyzed in detail. Short range repulsive interactions suppress oscillations and speed up relaxation but stretched chains still show damped oscillatory time correlations.

  6. Real-time Quantum Chemistry

    Quantum Physics (arXiv)

    Moritz P. Haag; Markus Reiher

    2012-08-18

    Significant progress in the development of efficient and fast algorithms for quantum chemical calculations has been made in the past two decades. The main focus has always been the desire to be able to treat ever larger molecules or molecular assemblies---especially linear and sub-linear scaling techniques are devoted to the accomplishment of this goal. However, as many chemical reactions are rather local, they usually involve only a limited number of atoms so that models of about two hundred (or even less) atoms embedded in a suitable environment are sufficient to study their mechanisms. Thus, the system size does not need to be enlarged, but remains constant for reactions of this type that can be described by less than two hundred atoms. The question then arises how fast one can obtain the quantum chemical results. This question is not directly answered by linear-scaling techniques. In fact, ideas such as haptic quantum chemistry or interactive quantum chemistry require an immediate provision of quantum chemical information which demands the calculation of data in "real time". In this perspective, we aim at a definition of real-time quantum chemistry, explore its realm and eventually discuss applications in the field of haptic quantum chemistry. For the latter we elaborate whether a direct approach is possible by virtue of real-time quantum chemistry.

  7. Operators in Polar Coordinates Quantum Chemistry: Chemistry 180-345A

    Physics Websites

    Ronis, David M.

    Operators in Polar Coordinates Quantum Chemistry: Chemistry 180-345A a ar a x y z r It turns out using Eq. (2), recalling that darctan(x) dx = 1 1 + x2 , Fall 2003 #12;Quantum Chemistry -2- Chemistry( ) r 2 r + sin2 ( ) r2 2 2 Fall 2003 #12;Quantum Chemistry -3- Chemistry 180-345A + cos( ) sin( ) r2

  8. Chemistry Education College of Science CHEM-BS-Teaching

    Biotechnology Websites

    Kihara, Daisuke

    )CHM24100 Intro to Inorganic Chemistry (3)CHM34200 Inorganic Chemistry (3)CHM37300 Physical Chemistry (1)CHM37301 Physical Chemistry Lab (3)CHM37400 Physical Chemistry (1)CHM37401 Physical Chemistry LabChemistry Education College of Science CHEM-BS-Teaching CHED 120 Credits 2.5 GPA in content courses

  9. Chemistry (ACS) College of Science CHEM-BSCHM

    Biotechnology Websites

    Kihara, Daisuke

    Chemistry (3)CHM34200 Inorganic Chemistry (1)CHM 34201 Inorganic Chemistry Lab (3)CHM37300 Physical Chemistry (3)CHM37400 Physical Chemistry (2)CHM37600 Physical Chemistry Lab (4)CHM 42400 AnalyticalChemistry (ACS) College of Science CHEM-BSCHM CHMA 120 Credits 2.0 GPA in CHM courses and 2.0 GPA

  10. Soft Confinement for Polymer Solutions

    Condensed Matter (arXiv)

    Yutaka Oya; Toshihiro Kawakatsu

    2014-05-09

    As a model of soft confinement for polymers, we investigated equilibrium shapes of a flexible vesicle that contains a phase-separating polymer solution. To simulate such a system, we combined the phase field theory (PFT) for the vesicle and the self-consistent field theory (SCFT) for the polymer solution. We observed a transition from a symmetric prolate shape of the vesicle to an asymmetric pear shape induced by the domain structure of the enclosed polymer solution. Moreover, when a non-zero spontaneous curvature of the vesicle is introduced, a re-entrant transition between the prolate and the dumbbell shapes of the vesicle is observed. This re-entrant transition is explained by considering the competition between the loss of conformational entropy and that of translational entropy of polymer chains due to the confinement by the deformable vesicle. This finding is in accordance with the recent experimental result reported by Terasawa, et al.

  11. Soft Confinement for Polymer Solutions

    CERN Preprints

    Oya, Yutaka

    2014-01-01

    As a model of soft confinement for polymers, we investigated equilibrium shapes of a flexible vesicle that contains a phase-separating polymer solution. To simulate such a system, we combined the phase field theory (PFT) for the vesicle and the self-consistent field theory (SCFT) for the polymer solution. We observed a transition from a symmetric prolate shape of the vesicle to an asymmetric pear shape induced by the domain structure of the enclosed polymer solution. Moreover, when a non-zero spontaneous curvature of the vesicle is introduced, a re-entrant transition between the prolate and the dumbbell shapes of the vesicle is observed. This re-entrant transition is explained by considering the competition between the loss of conformational entropy and that of translational entropy of polymer chains due to the confinement by the deformable vesicle. This finding is in accordance with the recent experimental result reported by Terasawa, et al.

  12. Rotational dynamics of entangled polymers

    Condensed Matter (arXiv)

    Jean-Charles Walter; Michiel Laleman; Marco Baiesi; Enrico Carlon

    2014-09-01

    Some recent results on the rotational dynamics of polymers are reviewed and extended. We focus here on the relaxation of a polymer, either flexible or semiflexible, initially wrapped around a rigid rod. We also study the steady polymer rotation generated by a constant torque on the rod. The interplay of frictional and entropic forces leads to a complex dynamical behavior characterized by non-trivial universal exponents. The results are based on extensive simulations of polymers undergoing Rouse dynamics and on an analytical approach using force balance and scaling arguments. The analytical results are in general in good agreement with the simulations, showing how a simplified approach can correctly capture the complex dynamical behavior of rotating polymers.

  13. Ring polymers with topological constraints

    Condensed Matter (arXiv)

    Yani Zhao; Franco Ferrari

    2014-02-02

    In the first part of this work a summary is provided of some recent experiments and theoretical results which are relevant in the research of systems of polymer rings in nontrivial topological conformations. Next, some advances in modeling the behavior of single polymer knots are presented. The numerical simulations are performed with the help of the Wang-Landau Monte Carlo algorithm. To sample the polymer conformation a set of random transformations called pivot moves is used. The crucial problem of preserving the topology of the knots after each move is tackled with the help of two new techniques which are briefly explained. As an application, the results of an investigation of the effects of topology on the thermal properties of polymer knots is reported. In the end, original results are discussed concerning the use of parallelized codes to study polymers knots composed by a large number of segments within the Wang-Landau approach.

  14. Confinement of semiflexible polymers

    Condensed Matter (arXiv)

    Jemal Guven; Pablo Vázquez-Montejo

    2012-02-16

    A variational framework is developed to examine the equilibrium states of a semi-flexible polymer that is constrained to lie on a fixed surface. As an application the confinement of a closed polymer loop of fixed length $2\\pi R$ within a spherical cavity of smaller radius, $R_0$, is considered. It is shown that an infinite number of distinct periodic completely attached equilibrium states exist, labeled by two integers: $n=2,3,4,...$ and $p=1,2,3,...$, the number of periods of the polar and azimuthal angles respectively. Small loops oscillate about a geodesic circle: $n=2$, $p=1$ is the stable ground state; states with higher $n$ exhibit instabilities. If $R\\ge 2R_0$ new states appear as oscillations about a doubly covered geodesic circle; the state $n=3, p=2$ replaces the two-fold as the ground state in a finite band of values of $R$. With increasing $R$, loop states alternate between orbital behavior as the poles are crossed and oscillatory behavior upon collapse to a multiple cover of a geodesic circle, (signalled respectively by an increase in $p$ and an increase in $n$). The force transmitted to the surface does not increase monotonically with loop size, but does asymptotically. It behaves discontinuously where $n$ changes. The contribution to energy from geodesic curvature is bounded. In large loops, the energy becomes dominated by a state independent contribution proportional to the loop size; the energy gap between the ground state and excited states disappears.

  15. The Chemistry of Conducting Polythiophenes**

    Chemistry Websites

    McCullough, Richard D.

    1970s, conjugated polymers were proclaimed as futuristic new materials that would lead to the next gen light-emitting diodes (LEDs)[1] and organic transistors[2] that new tech- nologies are imminent, microwave absorbing materials, new types of memory devices, nanoswitches, optical modulators and valves

  16. Carbon Chemistry in interstellar clouds

    Astrophysics (arXiv)

    Maryvonne Gerin; David Fosse; Evelyne Roueff

    2002-12-03

    We discuss new developments of interstellar chemistry, with particular emphasis on the carbon chemistry. We confirm that carbon chains and cycles are ubiquitous in the ISM and closely chemically related to ea ch other, and to carbon. Investigation of the carbon budget in shielded and UV illuminated gas shows that the inventory of interstellar molecules is not complete and more complex molecules with 4 or more carbon atoms must be present. Finally we discuss the consequences for the evolution of clouds and conclude that the ubiquitous presence of carbon chains and cycles is not a necessary consequence of a very young age for interstellar clouds.

  17. FNH 301 FOOD CHEMISTRY I Principles of Food Chemistry

    Environmental Sciences and Ecology Websites

    with the knowledge on the chemical changes that occurs in food systems, which ultimately influence the functional Chemistry, Chapter 2. Physical-Chemical properties of water p. 18-27 Physical properties of ice p. 28 as they related to the chemical composition and properties of major constituents of food To provide the student

  18. Undergraduate Research in Chemistry Undergraduate chemistry majors are encouraged to

    Mathematics Websites

    Turc, Catalin

    these are related to the SAGES Capstone experience and (c) how these are also related to graduation with honors. #12 presentation is required. (Approved Sages Capstone) [*when in total of 6 credits, or used in combination with CHEM 397/8 for a total of 6 credits] Prior to full implementation of SAGES, all BS Chemistry majors

  19. Directed-polymer systems explored via their quantum analogs: Topological constraints and their consequences

    Condensed Matter (arXiv)

    D. Zeb Rocklin; Shina Tan; Paul M. Goldbart

    2012-06-12

    The equilibrium statistical mechanics of classical directed polymers in 2 dimensions is well known to be equivalent to the imaginary-time quantum dynamics of a 1+1-dimensional many-particle system, with polymer configurations corresponding to particle world-lines. This equivalence motivates the application of techniques originally designed for one-dimensional many-particle quantum systems to the exploration of many-polymer systems, as first recognized and exploited by P.-G. de Gennes [J.\\ Chem.\\ Phys.\\ {\\bf 48}, 2257 (1968)]. In this low-dimensional setting interactions give rise to an emergent polymer fluid, and we examine how topological constraints on this polymer fluid (e.g., due to uncrossable pins or barriers) and their geometry give rise to strong, entropy-driven forces. In the limit of large polymer densities, in which a type of mean-field theory is accurate, we find that a point-like pin causes a divergent pile-up of polymer density on the high-density side of the pin and a zero-density region (or gap) of finite area on the low-density. In addition, we find that the force acting on a pin that is only mildly displaced from its equilibrium position is sub-Hookean, growing less than linearly with the displacement, and that the gap created by the pin also grows sublinearly with the displacement. By contrast, the forces acting between multiple pins separated along the direction preferred by the polymers are super-Hookean. These nonlinear responses result from effective long-ranged interactions between polymer segments, which emerge via short-ranged interactions between distant segments of long polymer strands. In the present paper, we focus on the case of an infinitely strong, repulsive contact interaction, which ensures that the polymers completely avoid one another. In a companion paper, we consider the effects of a wider set of inter-polymer interactions.

  20. Polymer solutions: from hard monomers to soft polymers

    Condensed Matter (arXiv)

    J. -P. Hansen; C. I. Addison; A. A. Louis

    2005-07-15

    A coarse-graining strategy for dilute and semi-dilute solutions of interacting polymers, and of colloid polymer mixtures is briefly described. Monomer degrees of freedom are traced out to derive an effective, state dependent pair potential between the polymer centres of mass. The cross-over between good and poor solvent conditions is discussed within a scaling analysis. The method is extended to block copolymers represented as "necklaces" of soft "blobs", and its success is illustrated here in the case of a symmetric diblock copolymer which exhibits microphase separation.

  1. Changes in Thermodynamic Interactions at Highly Immiscible Polymer/Polymer Interfaces due to Deuterium Labeling

    Physics Websites

    Changes in Thermodynamic Interactions at Highly Immiscible Polymer/Polymer Interfaces due, 2006 Deuterium labeling has been shown previously to affect thermodynamic interactions at polymer surfaces, polymer/polymer heterogeneous interfaces, and in bulk (away from a surface or interface). However

  2. Determining elasticity from single polymer Folarin Latinwoa

    Materials Science Websites

    Schroeder, Charles

    Determining elasticity from single polymer dynamics Folarin Latinwoa and Charles M. Schroeder*abc The ability to determine polymer elasticity and force­extension relations from polymer dynamics in flow has to far-from-equilibrium processes. In this work, we determine polymer elasticity from the dynamic

  3. Disentanglementand Reptation During Dissolution of Rubbery Polymers

    Biology and Medicine Websites

    Peppas, Nicholas A.

    Disentanglementand Reptation During Dissolution of Rubbery Polymers BALAJI NARASIMHAN and NIKOLAOS-1283 SYNOPSIS The dissolution mechanism of rubbery polymers was analyzed by dividing the penetrant concentration penetration into the rubbery polymer was assumed to be Fickian. The mode of mobility of the polymer chains

  4. Kac polymers Paolo Butt`a

    Mathematics Websites

    Procacci, Aldo

    Kac polymers Paolo Butt`a Aldo Procacci Benedetto Scoppola Abstract We show how a polymer in two- sidered on the appropriate scale. Key words: Polymers, Kac potentials, phase transition. Running title: Kac polymers Dedicated to a Marzio Cassandro's birthday. 1 Introduction In the last two decades

  5. Multicolored Electrochromism in Polymers: Structures and Devices

    Physics Websites

    Tanner, David B.

    with the commonly used characterization methods. The origin of electrochromism in conjugated polymers is explained the EC properties of conjugated polymers and tune their color states via modification of the polymer shown improved electrochromic properties.7 Conjugated polymers are a third class of EC materials

  6. Department of Chemistry Winter 2014

    Engineering Websites

    -founder of the Chemical Angel Network, an angel group looking for seed stage start-ups in the chemical sciences; Managing Collegiate Inventors and Innovators Alliance; a member of the Board of Directors of several start-up for the Department of Chemistry, starting Fall 2014. Her research interests are mechanisms to support and foster

  7. Chemistry & Biology 16 Supplemental Data

    Materials Science Websites

    Cheng, Jianjun

    Chemistry & Biology 16 Supplemental Data Inorganic Mercury Detection and Controlled Release buffer. Detection of mercury by fluorescence 2 µl of stock solution of 1, 2.5, 5, 10 or 100 µM of Hg(ClO4, 50, 100 or 1000 nM Hg2+ . The fluorescence change with the addition of inorganic mercury is monitored

  8. Chemistry 593 Problem Set 7

    Physics Websites

    Ronis, David M.

    Chemistry 593 Problem Set 7 Winter 2006 DUE: Friday, April 1, 1999 In this problem you will write to the nearest-neighbor lattice positions, the Hamiltonian for this problem is written as H = -kBTJ n.n si sj

  9. Nanografting for Surface Physical Chemistry

    Biotechnology Websites

    Liu, Gang-yu

    of nanografting (an atomic force microscopy­based lithography technique) in surface physi- cal chemistry. FirstUniversityofCalifornia-Davison11/03/10.Forpersonaluseonly. #12;AFM: atomic force microscopy SAM: self-assembled monolayer Nanostructures: assemblies of atoms, molecules, or ions with an overall dimension of less than 100 nm

  10. ACCESS VIII ATMOSPHERIC CHEMISTRY COLLOQUIUM

    Chemistry Websites

    Cohen, Ronald C.

    . The colloquium is jointly sponsored by the Department of Energy (DOE), the National Aeronautical and Space Administration (NASA), the National Oceanic and Atmospheric Administration (NOAA), and the National Science colloquium for new PhDs in atmospheric chemistry will be convened at Yellowstone National Park, Wyoming on 1

  11. BIOCHEMISTRY JOURNAL OF BIOLOGY CHEMISTRY

    Biotechnology Websites

    Luhua, Lai

    ENGINEERING PROTEIN SCIENCE JOURNAL OF COMPUTER-AIDED MOLECULAR DESIGN NATURE NUCLEIC ACIDS RESEARCH PROTEINS: STRUCTURE, GENETICS AND FUNCTION DRUG DISCOVERY TODAY ANGEW CHEM.ED CHEMICAL REVIEW J. ORG. CHEM. PNAS IN BIOTECHNOLOGY JOURNAL OF MOLECULAR MODELING COMPUTERS AND CHEMISTRY JOURNAL OF MOLECULAR GRAPHIC AND STRUCTURE

  12. Chemistry I Primary Writing or

    Biology and Medicine Websites

    Cantlon, Jessica F.

    MTH 161 Calculus I CHM 131 Chemistry I Primary Writing or Humanities/Social Science MTH 162 Biology PHY 122 Physics II Electricity & Magnetism MTH 164 Multidimensional Calculus Basic Science Elective Humanities/ Social Science ------------------ & WRT 273* Prof Writing BME 221/ 099 Lab Biomedical

  13. Chemistry I Primary Writing or

    Biology and Medicine Websites

    Cantlon, Jessica F.

    MTH 161 Calculus I CHM 131 Chemistry I Primary Writing or Humanities/Social Science MTH 162 Biology PHY 122 Physics II Electricity & Magnetism MTH 164 Multidimensional Calculus Basic Science Elective Humanities/ Social Science ------------------ & WRT 273* Prof Writing - BME 221/ 099 Lab

  14. Chemistry 209 Introductory Spectroscopy & Structure

    Chemistry Websites

    Le Roy, Robert J.

    Chemistry 209 Introductory Spectroscopy & Structure Lectures in B1­271: 11:30­12:20 MWF. Tutorial spectroscopy. In modern science, spectroscopy has become the most important probe of molecular structure at this stage in a science program. As is becoming increasingly common at Waterloo, this course will be managed

  15. Robert M. Corn Department of Chemistry

    Chemistry Websites

    Robert M. Corn Department of Chemistry · Surface Plasmon Resonance Imaging · Surface Enzyme Chemistries · RNA aptamers · Nanoparticle Diffraction Gratings · Magnetic Nanoparticles Extreme Biosensing molecule White light Polarizer Prism Bandpass filter CCD Camera Image analysis Processed image showing

  16. Multiresolution Quantum Chemistry in Multiwavelet Bases

    Mathematics Websites

    Beylkin, Gregory

    Multiresolution Quantum Chemistry in Multiwavelet Bases Robert J. Harrison1 , George I. Fann,6,7,8] is an alternative ap- proach that is potentially very attractive for computational chemistry. Our ap- proach closely

  17. Chemistry 593: Stirling's Formula David Ronis

    Physics Websites

    Ronis, David M.

    Chemistry 593: Stirling's Formula © David Ronis McGill University There is a simple way to obtain. The resulting integral is easily done, and hence, Winter, 2015 #12;Chemistry 593 -2- Stirling's Formula x!(2 )1

  18. Quantum Systems in Chemistry and Physics

    Physics Websites

    Engel, Eberhard

    Quantum Systems in Chemistry and Physics Volume 1 Basic Problems and Model Systems Granada, Spain.), Quantum Systems in Chemistry and Physics, Vol. 1: Basic Problems and Model Systems, 227±250. # 2000 Kluwer

  19. Chemistry 365: Stirling's Formula David Ronis

    Physics Websites

    Ronis, David M.

    Chemistry 365: Stirling's Formula © David Ronis McGill University There is a simple way to obtain. The resulting integral is easily done, and hence, Winter Term, 2015 #12;Chemistry 365 -2- Stirling's Formula x

  20. Protein-directed dynamic combinatorial chemistry 

    Edinburgh, University of - Research Archive

    Bhat, Venugopal T.

    2011-11-23

    Dynamic combinatorial chemistry (DCC) is a novel approach to medicinal chemistry which integrates the synthesis and screening of small molecule libraries into a single step. The concept uses reversible chemical reactions to present a dynamic library...

  1. Capturing Chemistry in XML/CML

    University of Cambridge - Dspace

    Townsend, Joseph A; Adams, Sam; Goodman, Jonathan M; Murray-Rust, Peter; Waudby, Chris A

    Chemical Markup Language (CML) is an XML-conformant Schema that describes molecules, spectra, reactions, and computational chemistry. It is capable of capturing the chemistry in a variety of current publications and is becoming adopted by many...

  2. Prof. Sarah L. Keller Department of Chemistry

    Physics Websites

    Keller, Sarah L.

    Bio Prof. Sarah L. Keller Department of Chemistry University of Washington, Seattle Sarah Keller of Sciences and was named a Fellow of the American Physical Society. She joined the Department of Chemistry

  3. Ramon Eritja Nucleic Acid Chemistry Group

    Physics Websites

    Ritort, Felix

    Ramon Eritja Nucleic Acid Chemistry Group Chemistry and Molecular Pharmacology Dpt. IRB Barcelona of thrombin (60 pM) #12;UseUse ofof NucleicNucleic AcidsAcids inin thethe designdesign ofof newnew drugsdrugs

  4. Abel Mndez Department of Physics and Chemistry

    Geosciences Websites

    Gilbes, Fernando

    Abel Méndez Department of Physics and Chemistry University of Puerto Rico of Physics and Chemistry University of Puerto Rico at Arecibo Appointments. Education: M.S. 1995, University of Puerto Rico at Mayagüez (Physics/Biophysics) B

  5. Thermally Activated Processes in Polymer Glasses

    Condensed Matter (arXiv)

    V. Parihar; D. Drosdoff; A. Widom; Y. N. Srivastava

    2005-12-03

    A derivation is given for the Vogel-Fulcher-Tammann thermal activation law for the glassy state of a bulk polymer. Our microscopic considerations involve the entropy of closed polymer molecular chains (i.e. polymer closed strings). For thin film polymer glasses, one obtains open polymer strings in that the boundary surfaces serve as possible string endpoint locations. The Vogel-Fulcher-Tammann thermal activation law thereby holds true for a bulk polymer glass but is modified in the neighborhood of the boundaries of thin film polymers.

  6. Polymer Parametrised Field Theory

    CERN Preprints

    Laddha, Alok

    2008-01-01

    Free scalar field theory on 2 dimensional flat spacetime, cast in diffeomorphism invariant guise by treating the inertial coordinates of the spacetime as dynamical variables, is quantized using LQG type `polymer' representations for the matter field and the inertial variables. The quantum constraints are solved via group averaging techniques and, analogous to the case of spatial geometry in LQG, the smooth (flat) spacetime geometry is replaced by a discrete quantum structure. An overcomplete set of Dirac observables, consisting of (a) (exponentials of) the standard free scalar field creation- annihilation modes and (b) canonical transformations corresponding to conformal isometries, are represented as operators on the physical Hilbert space. None of these constructions suffer from any of the `triangulation' dependent choices which arise in treatments of LQG. In contrast to the standard Fock quantization, the non- Fock nature of the representation ensures that the algebra of conformal isometries as well as tha...

  7. Transverse fluctuations of grafted polymers

    Condensed Matter (arXiv)

    Gianluca Lattanzi; Tobias Munk; Erwin Frey

    2003-11-04

    We study the statistical mechanics of grafted polymers of arbitrary stiffness in a two-dimensional embedding space with Monte Carlo simulations. The probability distribution function of the free end is found to be highly anisotropic and non-Gaussian for typical semiflexible polymers. The reduced distribution in the transverse direction, a Gaussian in the stiff and flexible limits, shows a double peak structure at intermediate stiffnesses. We also explore the response to a transverse force applied at the polymer free end. We identify F-Actin as an ideal benchmark for the effects discussed.

  8. Triplet forces between star polymers

    Condensed Matter (arXiv)

    Christian von Ferber; Arben Jusufi; Christos N. Likos; Hartmut Lowen; Martin Watzlawek

    2000-01-19

    We analyze the effective triplet interactions between the centers of star polymers in a good solvent. Using an analytical short distance expansion inspired by scaling theory, we deduce that the triplet part of the three-star force is attractive but only 11% of the pairwise part even for a close approach of three star polymers. We have also performed extensive computer simulations for different arm numbers to extract the effective triplet force. The simulation data show good correspondence with the theoretical predictions. Our results justify the effective pair potential picture even beyond the star polymer overlap concentration.

  9. Scaling Behaviors of Branched Polymers

    HEP - Theory (arXiv)

    Hajime Aoki; Satoshi Iso; Hikaru Kawai; Yoshihisa Kitazawa

    1999-11-01

    We study the thermodynamic behavior of branched polymers. We first study random walks in order to clarify the thermodynamic relation between the canonical ensemble and the grand canonical ensemble. We then show that correlation functions for branched polymers are given by those for $\\phi^3$ theory with a single mass insertion, not those for the $\\phi^3$ theory themselves. In particular, the two-point function behaves as $1/p^4$, not as $1/p^2$, in the scaling region. This behavior is consistent with the fact that the Hausdorff dimension of the branched polymer is four.

  10. Thermodynamics of tubelike flexible polymers

    Condensed Matter (arXiv)

    Thomas Vogel; Thomas Neuhaus; Michael Bachmann; Wolfhard Janke

    2009-07-17

    In this work we present the general phase behavior of short tubelike flexible polymers. The geometric thickness constraint is implemented through the concept of the global radius of curvature. We use sophisticated Monte Carlo sampling methods to simulate small bead-stick polymer models with Lennard-Jones interaction among non-bonded monomers. We analyze energetic fluctuations and structural quantities to classify conformational pseudophases. We find that the tube thickness influences the thermodynamic behavior of simple tubelike polymers significantly, i.e., for given temperature, the formation of secondary structures strongly depends on the tube thickness.

  11. POLYMERS FOR ADVANCED TECHNOLOGIES Polym. Adv. Technol. 14, 565573 (2003)

    Materials Science Websites

    Yang, Jian

    2003-01-01

    of the scaffold prepared by the improved solid­liquid separation was useful for nutrition transportation and cell approved by FDA for human clinical use [1­4]. These synthetic biodegradable polymers have been employed

  12. Graduate Student Handbook Department of Chemistry

    Chemistry Websites

    Reid, Scott A.

    ......................................................................................................... 5 Specific Requirements for the M.S. (Plan A or B) in Chemistry ............................................................................................. 3 II. Doctoral Planning Form

  13. Z .Marine Chemistry 64 1999 181198 Model simulation of the carbonate chemistry in the

    Environmental Sciences and Ecology Websites

    Zeebe, Richard E.

    Z .Marine Chemistry 64 1999 181­198 Model simulation of the carbonate chemistry demonstrated that the d13 C and d18 O are not only strongly dependent on the carbonate chemistry of the culture the onset of the industrial revolution the carbonate chemistry of the surface water must have changed

  14. Supplementary online material Bromine and iodine chemistry in a global chemistry-

    Environmental Sciences and Ecology Websites

    Meskhidze, Nicholas

    1 Supplementary online material Bromine and iodine chemistry in a global chemistry- climate model, Toledo, Spain 2 Atmospheric Chemistry Division, NCAR, Boulder, CO, USA 3 University of Miami, Miami, FL, Zurich, Switzerland 6 Climate Service Center, Hamburg, Germany #12;2 Chemistry of VSL halogen species

  15. Graduate Programs in Chemistry The Department of Chemistry at Wichita State offers courses

    Engineering Websites

    of biochemistry and analytical, inorganic, organic, and physical chemistry. Admission Requirements To enroll, organic and physical chemistry and biochemistry assessment exams in their first semester in the programGraduate Programs in Chemistry The Department of Chemistry at Wichita State offers courses of study

  16. STUDENT POSITIONS IN CHEMISTRY PROGRAM Subject to budgetary approval, the Program in Chemistry anticipates hiring student

    Environmental Sciences and Ecology Websites

    Northern British Columbia, University of

    (TEACHING) FOR UPPER YEAR CHEMISTRY LABORATORY Organic, Biochemistry, Analytical, and Environmental MARKERS chemistry course (100 -110 hours per term) Student assistant (teaching) for upper year laboratory : OrganicSTUDENT POSITIONS ­ IN CHEMISTRY PROGRAM Subject to budgetary approval, the Program in Chemistry

  17. ChemistryCommunication Challenge 2005 The Department of Chemistry, National University of Singapore, the Singapore National

    Chemistry Websites

    Yao, Shao Q

    is `Environmental Chemistry' which is a growing concern in Singapore and the world. Environmental Chemistry is not simply about pollution and "green chemistry." Its scope addresses the chemistry of our environment to use information technology (IT) to demonstrate difficult chemical concepts. The key advantages

  18. Chemistry & Biology Topological Models of Heteromeric Protein

    Biotechnology Websites

    Sali, Andrej

    Chemistry & Biology Resource Topological Models of Heteromeric Protein Assemblies from Mass V. Robinson1,* 1Department of Chemistry, University of Oxford, South Parks Road, Oxford OX1 3QZ, UK 2Department of Chemistry, King's College London, 7 Trinity Street, London SE1 1DB, UK 3Department

  19. Brandeis University Chemistry current number of majors

    Computer Technologies and Information Sciences Websites

    Hickey, Timothy J.

    . Our undergraduate students have co-authored publications in the journals Inorganic Chemistry, OrganoBrandeis University Chemistry fast facts current number of majors and minors: 93 Number of faculty, physics Website: www.chem.brandeis.edu aBOUt the prOgram Chemistry strives to understand natural phenomena

  20. Chemistry 593: Problem Set 5 David Ronis

    Physics Websites

    Ronis, David M.

    Chemistry 593: Problem Set 5 © David Ronis McGill University DUE: Friday, March 13, 1998 1. What of the Winter, 2015 #12;Chemistry 593 -2- Problem Set 5 functional when ( r) 0 everywhere (e.g., suppose I to include these in the Winter, 2015 #12;Chemistry 593 -3- Problem Set 5 theory. 8. Consider a dilute gas

  1. Case Western Reserve University Department of Chemistry

    Mathematics Websites

    Turc, Catalin

    Case Western Reserve University Department of Chemistry INFORMATION FOR GRADUATE STUDENTS IN CHEMISTRY 2009-2010 Preface This booklet presents information of interest to graduate students in the Department of Chemistry. It is produced by the Graduate Affairs Committee and revised annually. The Chair

  2. An Algorithmic Chemistry for Genetic Programming

    Computer Technologies and Information Sciences Websites

    Fernandez, Thomas

    An Algorithmic Chemistry for Genetic Programming Christian W.G. Lasarczyk1 and Wolfgang Banzhaf2, 1 discuss a new method of execution of programs introduced recently: Algorithmic Chemistries. Therein of this type can be seen as artificial chemistries, where instructions interact with each other (by taking

  3. Case Western Reserve University Department of Chemistry

    Mathematics Websites

    Turc, Catalin

    Case Western Reserve University Department of Chemistry INFORMATION FOR GRADUATE STUDENTS IN CHEMISTRY 2012-2013 Preface This booklet presents information of interest to graduate students in the Department of Chemistry. It is produced by the Graduate Affairs Committee and revised annually. The Chair

  4. College of Chemistry University of California, Berkeley

    Materials Science Websites

    Yaghi, Omar M.

    College of Chemistry University of California, Berkeley 420 Latimer Hall #1460 Berkeley, CA 94720-1460 Undergraduate Majors Office: University of California, Berkeley College of Chemistry 420 Latimer Hall #1460, Berkeley Department of Chemistry 419 Latimer Hall #1460 Berkeley, CA 94720-1460 (510) 642-5882 Non

  5. THE UNIVERSITY OF ARIZONA DEPARTMENT OF CHEMISTRY &

    Physics Websites

    Ziurys, Lucy M.

    THE UNIVERSITY OF ARIZONA DEPARTMENT OF CHEMISTRY & BIOCHEMISTRY GRADUATE HANDBOOK BIOCHEMISTRY in the Biochemistry program of the Department of Chemistry and Biochemistry. There may be additional requirements & Cellular Biology (BMCB) or the Biological Chemistry Program (BCP)], and students should also be familiar

  6. Case Western Reserve University Department of Chemistry

    Mathematics Websites

    Turc, Catalin

    Case Western Reserve University Department of Chemistry INFORMATION FOR GRADUATE STUDENTS IN CHEMISTRY 2010-2011 Preface This booklet presents information of interest to graduate students in the Department of Chemistry. It is produced by the Graduate Affairs Committee and revised annually. The Chair

  7. GENETIC PROGRAMMING OF AN ALGORITHMIC CHEMISTRY

    Computer Technologies and Information Sciences Websites

    Fernandez, Thomas

    Chapter 11 GENETIC PROGRAMMING OF AN ALGORITHMIC CHEMISTRY W. Banzhaf and C. Lasarczyk can be considered as an artificial chemistry. It lends itself well to distributed and parallel. Programs of this type can be seen as artificial chemistries, where instructions interact with each other

  8. University of Connecticut Department of Chemistry

    Mathematics Websites

    Lozano-Robledo, Alvaro

    University of Connecticut Department of Chemistry NSF Research Experience for Undergraduates (REU) Program Web Site: http://web.uconn.edu/chemistry/reu.html REU Site Directors: Mark W. Peczuh & José GascónREU@uconn.edu Fax: (860) 486-2981 Mail: REU Site Coordinator Department of Chemistry, University of Connecticut

  9. MOUNT ALLISON UNIVERSITY DEPARTMENT OF CHEMISTRY & BIOCHEMISTRY

    Computer Technologies and Information Sciences Websites

    Rosebrugh, Robert

    MOUNT ALLISON UNIVERSITY DEPARTMENT OF CHEMISTRY & BIOCHEMISTRY The Department of Chemistry & Biochemistry at Mount Allison University in Sackville, New Brunswick invites applications for a Margaret biochemistry/chemistry courses, as well as to intellectual life on. The successful candidate would be expected

  10. CHEMISTRY OF LIFE PROCESSES GRADUATE TRAINING PROGRAM

    Materials Science Websites

    's renowned faculty expertise in biologically-integrated chemistry and the experience of the Chemistry of Life1 CHEMISTRY OF LIFE PROCESSES GRADUATE TRAINING PROGRAM STUDENT HANDBOOK 2014 Funded by a grant from the National Institutes of Health #12;2 Leadership

  11. Chemistry Graduate Student Handbook Approved September 2015

    Physics Websites

    Harris, Jack

    Chemistry Graduate Student Handbook Approved September 2015 Table of Contents Page Timeline of an Advisor Outside of the Chemistry Department 7 D. Changing of Research Advisors 8 III. Second-Year Oral for Students in Preparative Areas of Chemistry 13 3. Public Presentation of Research Progress 14 B. Time

  12. Maple Syrup--Production, Composition, Chemistry,

    Environmental Sciences and Ecology Websites

    Hayden, Nancy J.

    CHAPTER 4 Maple Syrup--Production, Composition, Chemistry, and Sensory Characteristics Timothy D Chemistry 111 A. Transformation during storage 115 B. Transformations during reverse osmosis Processing 121 IX. Syrup Standards 124 X. Syrup Chemistry 126 A. Density 126 B. Carbohydrates 126 C. pH 126 D

  13. College of Arts & Sciences Chemistry, MS

    Materials Science Websites

    New Mexico, University of

    College of Arts & Sciences Chemistry, MS Broad Learning Goals A. The student will develop a broad understanding of the major areas of chemistry with an understanding and awareness of the professional, ethical-rooted knowledge in their chosen sub-discipline in chemistry. C. The student will be able to report, present and

  14. IMPROVED QUASISTEADYSTATEAPPROXIMATION METHODS FOR ATMOSPHERIC CHEMISTRY INTEGRATION #

    Mathematics Websites

    Jay, Laurent O.

    IMPROVED QUASI­STEADY­STATE­APPROXIMATION METHODS FOR ATMOSPHERIC CHEMISTRY INTEGRATION # L. O. JAY for integrating sti# ordinary di#erential equations arising from atmo­ spheric chemistry problems. In this paper QSSA are presented. Key words. atmospheric chemistry, sti# ordinary di#erential equations, quasi

  15. Patterning Nanoscale Structures by Surface Chemistry

    Materials Science Websites

    Lu, Wei

    Patterning Nanoscale Structures by Surface Chemistry Wei Lu* and Dongchoul Kim Department combines spinodal decomposition, surface stress and surface chemistry. The simulation shows that the self-assembly process can be guided by tuning the surface chemistry of a substrate. An epilayer may evolve into various

  16. Chemistry: Ethics for Sustainability Schloss Thurnau

    Mathematics Websites

    Dettweiler, Michael

    Chemistry: Ethics for Sustainability Schloss Thurnau (http://www.schlossthurnau.de) 22 Juli 2011) Opening remarks 09:45 Hartmut Frank (University of Bayreuth) Sustainability through chemistry, a matter of science and technology 12:15 Luigi Campanella (University of Rome) Chemistry and bioethics: Contribution

  17. University of Chicago 1 Biological Chemistry

    Mathematics Websites

    May, J. Peter

    University of Chicago 1 Biological Chemistry Program of Study The Department of Chemistry, in conjunction with the Department of Biochemistry and Molecular Biology (BCMB) in the Division of the Biological Sciences, offers a BS degree in Biological Chemistry. The program is designed to prepare students to enter

  18. The University of Oregon 1 Chemistry and

    Chemistry Websites

    Cina, Jeff

    and bachelor of science degrees with majors in chemistry or biochemistry. The department enjoys a strong of the liberal education offered by the College of Arts and Sciences. Chemistry course work is a sound foundation for students interested in advanced work in chemistry or related sciences, particularly such fields

  19. ATS621, Fall 2014 Atmospheric Chemistry

    Geosciences Websites

    Fischer, Emily V.

    be obtained here: http://acmg.seas.harvard.edu/people/faculty/djj/book/ Atmospheric Chemistry and PhysicsATS621, Fall 2014 Atmospheric Chemistry Monday and Wednesday, 9 ­ 9:50, 212B ACRC Instructor: Prof) Understand quantitatively how emissions, transport, chemistry and deposition impact atmospheric chemical

  20. Michelle D. Pawel Chemistry Lab Technologist

    Materials Science Websites

    Pennycook, Steve

    Michelle D. Pawel Chemistry Lab Technologist Nanoscale Synthesis and Functional Assembly Center: Pfeiffer College, Misenheimer, North Carolina Chemistry and Math B.S., 1984 University of Tennessee-Knoxville Chemistry M.S., 1988 Professional Experience: 2005­p Chemical Lab Technologist, Nanoscale Synthesis

  1. Polymer induced depletion potentials in polymer-colloid mixtures

    Condensed Matter (arXiv)

    A. A. Louis; P. G. Bolhuis; E. J. Meijer; J. P. Hansen

    2002-03-06

    The depletion interactions between two colloidal plates or between two colloidal spheres, induced by interacting polymers in a good solvent, are calculated theoretically and by computer simulations. A simple analytical theory is shown to be quantitatively accurate for case of two plates. A related depletion potential is derived for two spheres; it also agrees very well with direct computer simulations. Theories based on ideal polymers show important deviations with increasing polymer concentration: They overestimate the range of the depletion potential between two plates or two spheres at all densities, with the largest relative change occurring in the dilute regime. They underestimate the well depth at contact for the case of two plates, but overestimate it for two spheres. Depletion potentials are also calculated using a coarse graining approach which represents the polymers as ``soft colloids'': good agreement is found in the dilute regime. Finally, the effect of the polymers on colloid-colloid osmotic virial coefficients is related to phase behavior of polymer-colloid mixtures.

  2. General and Organic chemistry Lab Table of Contents

    Geosciences Websites

    General and Organic chemistry Lab Table of Contents Laboratory Information ............................................................................................................................11 #12;1 General and Organic chemistry Lab Policies and Information Laboratory Teaching and Technical Staff: Laboratory Directors: General Chemistry Organic Chemistry Dr. Meishan Zhao Dr. Valerie Keller

  3. MAJOR TO CAREER GUIDE B.S. Chemistry

    Environmental Sciences and Ecology Websites

    Walker, Lawrence R.

    · Medicinal Chemistry · Inorganic and Organic Chemistry · Chemical Research · Chemical Technology Graduate for advanced training in a wide variety of chemistry related disciplines including Organic, Physical Journal Club (NJC) Websites for professional chemistry organizations: American Chemical Society (ACS), www

  4. Middle Tennessee State University Department of Chemistry Master's Program

    Mathematics Websites

    Hong, Don

    Intermediate Organic Chemistry (3 hours) CHEM 6400 Intermediate Inorganic Chemistry (3 hours) CHEM 6230/instrumental, biochemistry, general, inorganic, organic, and physical chemistry. Graduate Assistantships Students1 Middle Tennessee State University Department of Chemistry Master's Program Graduate Student

  5. Content Development Policy: Chemistry 1 The University of Manchester Library

    Mathematics Websites

    Abrahams, I. David

    Content Development Policy: Chemistry 1 The University of Manchester Library Content Development Policy Chemistry Monday, 30 April 2012 Contents Content Development Policy Chemistry....................................................................................................................................................33 #12;2 Content Development Policy: Chemistry Introduction This document presents the Content

  6. Department of Chemistry Cambridge MPhil in Chemistry Supplementary Application Form Department of Chemistry

    Chemistry Websites

    Keeler, James

    . These include the various scholarship programmes arranged centrally through the University, see www.graduate.study.cam.ac.uk/finance/funding. If you are considering applying for University scholarship funding for an MPhil in Chemistry the early deadline for scholarships is met. Submission of the GRADSAF bears a fee of £50. See

  7. Department of Chemistry Cambridge PhD in Chemistry Supplementary Application Form Department of Chemistry

    Chemistry Websites

    Keeler, James

    the University's EPSRC Doctoral Training Account and various scholarship programmes arranged centrally applying for Departmental or University scholarship funding for a PhD in Chemistry you the early deadline for scholarships is met. Submission of the GRADSAF bears a fee of £50. See

  8. Characterization of macro-length conducting polymers and the development of a conducting polymer rotary motor

    MIT - DSpace

    Schmid, Bryan D. (Bryan David), 1981-

    2005-01-01

    Conducting polymers are a subset of materials within the electroactive polymer class that exhibit active mechanical deformations. These deformations induce stresses and strains that allow for conducting polymers to be used ...

  9. Barrier crossing of semiflexible polymers

    Condensed Matter (arXiv)

    P. Kraikivski; R. Lipowsky; J. Kierfeld

    2005-11-05

    We consider the motion of semiflexible polymers in double-well potentials. We calculate shape, energy, and effective diffusion constant of kink excitations, and in particular their dependence on the bending rigidity of the semiflexible polymer. For symmetric potentials, the kink motion is purely diffusive whereas kink motion becomes directed in the presence of a driving force on the polymer. We determine the average velocity of the semiflexible polymer based on the kink dynamics. The Kramers escape over the potential barriers proceeds by nucleation and diffusive motion of kink-antikink pairs, the relaxation to the straight configuration by annihilation of kink-antikink pairs. Our results apply to the activated motion of biopolymers such as DNA and actin filaments or synthetic polyelectrolytes on structured substrates.

  10. Nanomechanical characterization of polymer nanocomposites

    Materials Science Websites

    Van Vliet, Krystyn J.

    Nanomechanical characterization of polymer nanocomposites OVERVIEW: The rapidly expanding field of nanocomposites is generating many new materials with novel properties that are not generally predictable. However, designing these nanocomposites for industrial applications requires a refined understanding

  11. Continuous production of conducting polymer

    MIT - DSpace

    Gaige, Terry A. (Terry Alden), 1981-

    2004-01-01

    A device to continuously produce polypyrrole was designed, manufactured, and tested. Polypyrrole is a conducting polymer which has potential artificial muscle applications. The objective of continuous production was to ...

  12. Conducting polymer actuators : temperature effects

    MIT - DSpace

    Del Zio, Michael R. (Michael Robert), 1982-

    2006-01-01

    In order to utilize conducting polymer actuators as a viable engineering solution, it is necessary to produce usable levels of force with a reasonable bandwidth. Polypyrrole actuated at temperatures as high as 100 °C ...

  13. Constitutive modeling of active polymers

    MIT - DSpace

    Therkelsen, Scott V. (Scott Vincent), 1980-

    2005-01-01

    This thesis develops a three-dimensional constitutive model of active polymeric materials, including changes in material volume and properties due to actuation. Active polymers reversibly change shape, volume and/or material ...

  14. Polymer Bose--Einstein Condensates

    General Relativity & Quantum Cosmology (arXiv)

    E. Castellanos; G. Chacon-Acosta

    2013-01-22

    In this work we analyze a non--interacting one dimensional polymer Bose--Einstein condensate in an harmonic trap within the semiclassical approximation. We use an effective Hamiltonian coming from the polymer quantization that arises in loop quantum gravity. We calculate the number of particles in order to obtain the critical temperature. The Bose--Einstein functions are replaced by series, whose high order terms are related to powers of the polymer length. It is shown that the condensation temperature presents a shift respect to the standard case, for small values of the polymer scale. In typical experimental conditions, it is possible to establish a bound for $\\lambda^{2}$ up to $ \\lesssim 10 ^{-16}$m$^2$. To improve this bound we should decrease the frequency of the trap and also decrease the number of particles.

  15. Event distributions of polymer translocation

    Condensed Matter (arXiv)

    R. P. Linna; K. Kaski

    2012-03-30

    We present event distributions for the polymer translocation obtained by extensive Langevin dynamics simulations. Such distributions have not been reported previously and they provide new understanding of the stochastic characteristics of the process. We extract at a high length scale resolution distributions of polymer segments that continuously traverse through a nanoscale pore. The obtained log-normal distributions together with the characteristics of polymer translocation suggest that it is describable as a multiplicative stochastic process. In spite of its clear out-of-equilibrium nature the forced translocation is surprisingly similar to the unforced case. We find forms for the distributions almost unaltered with a common cut-off length. We show that the individual short-segment and short-time movements inside the pore give the scaling relations $\\tau \\sim N^\\alpha$ and $\\tau \\sim f^{-\\beta}$ for the polymer translocation.

  16. A conjugated polymer plastic gel

    MIT - DSpace

    Alcazar Jorba, Daniel

    2008-01-01

    We present a gel route to process highly oriented conjugated polymer films and fibers. The incorporation of hexafluoroisopropanol, a strong and stable dipolar group, to the polythiophene backbone enhances the solubility ...

  17. On Turbulence of Polymer Solutions

    Nonlinear Sciences (arXiv)

    E. Balkovsky; A. Fouxon; V. Lebedev

    2001-04-17

    We investigate high-Reynolds number turbulence in dilute polymer solutions. We show the existence of a critical value of the Reynolds number which separates two different regimes. In the first regime, below the transition, the influence of the polymer molecules on the flow is negligible and they can be regarded as passively embedded in the flow. This case admits a detailed investigation of the statistics of the polymer elongations. The second state is realized when the Reynolds number is larger than the critical value. This regime is characterized by the strong back reaction of polymers on the flow. We establish some properties of the statistics of the stress and velocity in this regime and discuss its relation to the drag reduction phenomenon.

  18. Intermolecular adhesion in conducting polymers

    Condensed Matter (arXiv)

    Jeremy D. Schmit; Alex J. Levine

    2004-04-05

    We analyze the interaction of two conducting, charged polymer chains in solution using a minimal model for their electronic degrees of freedom. We show that a crossing of the two chains in which the polymers pass within Angstroms of each other leads to a decrease of the electronic energy of the combined system that is significantly larger than the thermal energy and thus promotes interchain aggregation. We consider the competition of this attractive interaction with the screened electrostatic repulsion and thereby propose a phase diagram for such polymers in solution; depending on the charge density and persistence length of the chains, the polymers may be unbound, bound in loose, braid-like structures, or tightly bound in a parallel configuration.

  19. Phase diagram of magnetic polymers

    Condensed Matter (arXiv)

    T. Garel; H. Orland; E. Orlandini

    1999-02-10

    We consider polymers made of magnetic monomers (Ising or Heisenberg-like) in a good solvent. These polymers are modeled as self-avoiding walks on a cubic lattice, and the ferromagnetic interaction between the spins carried by the monomers is short-ranged in space. At low temperature, these polymers undergo a magnetic induced first order collapse transition, that we study at the mean field level. Contrasting with an ordinary $\\Theta$ point, there is a strong jump in the polymer density, as well as in its magnetization. In the presence of a magnetic field, the collapse temperature increases, while the discontinuities decrease. Beyond a multicritical point, the transition becomes second order and $\\Theta$-like. Monte Carlo simulations for the Ising case are in qualitative agreement with these results.

  20. Branched Polymers Re-Revisited

    HEP - Theory (arXiv)

    J. Ambjorn; B. Durhuus; T. Jonsson

    1999-09-28

    We point out some misconceptions in a recent paper by H. Aoki et al. [hep-th/9909060]. In particular, the claim that the two-point function of branched polymers behaves as 1/p^4 instead of 1/p^2 for large p is mistaken and in no way a precondition for the Hausdorff dimension of branched polymers having the well known value four.

  1. Cosmological Constant and Polymer Physics

    General Relativity & Quantum Cosmology (arXiv)

    Paulo Roberto Silva

    2008-12-21

    It is traced out a parallel between the cosmological constant problem and the polymer physics. The time evolution of the universe world line is compared with the growing of a polymer chain. An equivalent Flory free energy and a modification of it are used as a means to evaluate two versions for the radius of gyration of the universe. It is proposed a link between this radius of gyration and the cosmological constant parameter.

  2. Branched Polymers and Dimensional Reduction

    Mathematical Physics (arXiv)

    David C. Brydges; John Z. Imbrie

    2002-01-15

    We establish an exact relation between self-avoiding branched polymers in D+2 continuum dimensions and the hard-core continuum gas at negative activity in D dimensions. We review conjectures and results on critical exponents for D+2 = 2,3,4 and show that they are corollaries of our result. We explain the connection (first proposed by Parisi and Sourlas) between branched polymers in D+2 dimensions and the Yang-Lee edge singularity in D dimensions.

  3. Polymer Translocation in Crowded Environments

    Condensed Matter (arXiv)

    Ajay Gopinathan; Yong Woon Kim

    2007-03-30

    We study the effect of the crowded nature of the cellular cytoplasm on the translocation of a polymer through a pore in a membrane. By systematically treating the entropic penalty due to crowding, we show that the translocation dynamics are significantly altered, leading to novel scaling behaviors of the translocation time in terms of chain length. We also observe new and qualitatively different translocation regimes depending upon the extent of crowding, transmembrane chemical potential asymmetry, and polymer length.

  4. Polymer transport by laminar flows

    Nonlinear Sciences (arXiv)

    M. De Lucia; A. Mazzino; A. Vulpiani

    2002-02-18

    Polymer transport is investigated for two paradigmatic laminar flows having open and closed streamlines, respectively. For both types of flows we find transport depletion owing to the action of the polymers elastic degree of freedom. For flows with closed streamlines the leading mechanism for the observed transport reduction is the (dynamical) formation of barriers. For flows with open streamlines the reduction of transport is induced by the renormalization of the bare diffusion coefficient. Results have been obtained by means of Lagrangian simulations.

  5. Polymer Adsorption on Curved Surfaces

    Condensed Matter (arXiv)

    Handan Ark?n; Wolfhard Janke

    2015-12-22

    The conformational behavior of a coarse-grained semiflexible finite polymer chain near an attractive spherical surface was investigated by means of generalized-ensemble Monte Carlo computer simulations. In a detailed analysis of canonical equilibrium data over a wide range of sphere radius and temperature, we have constructed the phase diagrams both for end-grafted and non-grafted polymers. Phase diagrams are discussed and compared for both cases.

  6. Stiff polymer in monomer ensemble

    Condensed Matter (arXiv)

    K. K. Muller-Nedebock; H. L. Frisch; J. K. Percus

    2002-01-18

    We make use of the previously developed formalism for a monomer ensemble and include angular dependence of the segments of the polymer chains thus described. In particular we show how to deal with stiffness when the polymer chain is confined to certain regions. We investigate the stiffness from the perspectives of a differential equation, integral equations, or recursive relations for both continuum and lattice models. Exact analytical solutions are presented for two cases, whereas numerical results are shown for a third case.

  7. Continuum Theory of Polymer Crystallization

    Condensed Matter (arXiv)

    Arindam Kundagrami; M. Muthukumar

    2006-12-19

    We present a kinetic model of crystal growth of polymers of finite molecular weight. Experiments help to classify polymer crystallization broadly into two kinetic regimes. One is observed in melts or in high molar mass polymer solutions and is dominated by nucleation control with $G \\sim \\exp(1/T \\Delta T)$, where $G$ is the growth rate and $\\Delta T$ is the super-cooling. The other is observed in low molar mass solutions (as well as for small molecules) and is diffusion controlled with $G \\sim \\Delta T$, for small $\\Delta T$. Our model unifies these two regimes in a single formalism. The model accounts for the accumulation of polymer chains near the growth front and invokes an entropic barrier theory to recover both limits of nucleation and diffusion control. The basic theory applies to both melts and solutions, and we numerically calculate the growth details of a single crystal in a dilute solution. The effects of molecular weight and concentration are also determined considering conventional polymer dynamics. Our theory shows that entropic considerations, in addition to the traditional energetic arguments, can capture general trends of a vast range of phenomenology. Unifying ideas on crystallization from small molecules and from flexible polymer chains emerge from our theory.

  8. Hydrodynamic Effects on Confined Polymers

    Condensed Matter (arXiv)

    Santtu T. T. Ollila; Colin Denniston; Mikko Karttunen; Tapio Ala-Nissila

    2012-10-31

    We consider the statics and dynamics of a flexible polymer confined between parallel plates both in the presence and absence of hydrodynamic interactions. The hydrodynamic interactions are described at the level of the fluctuating, compressible Navier-Stokes equation. We consider two cases: (i) confinement for both the solvent and the polymer, and (ii) confinement for the polymer only (in a 3D solvent), which is experimentally feasible, for instance, by (optical) trapping. We find a continuous transition from 2D to 3D dynamic scaling as a function of decreasing degree of confinement within the de Gennes and the weak-confinement regimes. We demonstrate that, in the presence of hydrodynamics, the polymer's center-of-mass diffusion coefficient in the direction parallel to the walls scales differently as a function of the level of confinement in cases (i) and (ii). We also find that in the commonly used Langevin dynamics description, the polymer swells more parallel to the walls than in the presence of hydrodynamics, and the planar diffusion coefficient shows scaling behavior similar to case (ii) rather than case (i). In addition, we quantify the differences in the static structure factor of the polymer between cases (i) and (ii), and between case (i) and Langevin dynamics.

  9. Name: Intended quarter of entry: Academic Planning Worksheet for Chemistry

    Biology and Medicine Websites

    Chemistry One of the following CHEM series: CHEM 237 NW - Organic Chemistry CHEM 238 NW - Organic Chemistry OR: CHEM 335 NW ­Honors Organic Chemistry CHEM 336 NW - Honors Organic Chemistry UniversityName: Intended quarter of entry: Academic Planning Worksheet for Chemistry This worksheet

  10. Faculty of Science Chemistry is the study of matter -

    Physics Websites

    and laboratory experience in the general sub-disciplines of chemistry: · Organic Chemistry · Physical ChemistryFaculty of Science Chemistry Chemistry is the study of matter - anything that has mass and occupies space. Everything you can touch, hold, smell or taste involves chemistry and chemicals. Chemists design

  11. CHEMISTRY, B.S.C. BIOCHEMISTRY OPTION (CHEB)

    Mathematics Websites

    Hamburger, Peter

    Inorganic Chemistry ______ 3 CHM 26100 Organic Chemistry ______ 2 CHM 26500 Organic Chemistry Lab ______ 3 CHM 26200 Organic Chemistry ______ 2 CHM 26600 Organic Chemistry Lab ______ 1 CHM 28000 ChemicalCHEMISTRY, B.S.C. BIOCHEMISTRY OPTION (CHEB) (Fall 2015-Summer 2016) IPFW Residency Requirements

  12. Chemistry Education College of Science CHEM-BS-Teaching

    Biotechnology Websites

    Kihara, Daisuke

    )CHM24100 Intro to Inorganic Chemistry (3)CHM34200 Inorganic Chemistry (3)CHM37300 Physical Chemistry (3)CHM37400 Physical Chemistry (1)CHM37301 Physical Chemistry Lab (1)CHM37401 Physical Chemistry Lab20000 History and Philosophy of Education (satisfies Human Cultures Humanities for core) (3)EDPS23500

  13. Chemistry Education College of Science CHEM-BS-Teaching

    Biotechnology Websites

    Kihara, Daisuke

    )CHM24100 Intro to Inorganic Chemistry (3)CHM34200 Inorganic Chemistry (3)CHM37300 Physical Chemistry (3)CHM37400 Physical Chemistry (2)CHM37600 Physical Chemistry Lab (1)CHM 19400 Freshman Chemistry Technology(satisfies Information Literacy Selective for core) (3)EDST20000 History and Philosophy

  14. April 1999 CUME Organic Chemistry

    Chemistry Websites

    Glaser, Rainer

    --Columbia Saturday, April 3, 1999, @Nine O' Clock, 125I Chemistry Dr. Rainer Glaser Announced Reading: "Synthetic of the H-atoms.] (10 points) O O O O O O 1 2 3OO O heat (d) Show the structure of the product formed-Ph-NC with X = H, NO2, CO2CH3, OCH3, CH3, NH2, and OH. The 13C chemical shifts of the isonitrile C-atoms

  15. B.S. and ACS Approved Degrees in Chemistry Requirements for the Chemistry B.S. degree program

    Chemistry Websites

    McQuade, D. Tyler

    B.S. and ACS Approved Degrees in Chemistry Requirements for the Chemistry B.S. degree program General Chemistry CHM 1045 & 1045L; 1046 & 1046L or CHM 1050, 1050L; 1051, 1051L Analytical Chemistry CHM 3120 & 3120L; 4130 & 4130L Inorganic Chemistry CHM 4610, 4610L Organic Chemistry CHM 2210; 2211, 2211L

  16. ELEMENTSA publication of the Chemistry Division at IIT Fall 2013Chemistry Group photo, Welcome Lunch 2013-14

    Mathematics Websites

    Heller, Barbara

    1 CHEMISTRY ELEMENTSA publication of the Chemistry Division at IIT Fall 2013Chemistry Group photo of Chemistry Elements, the newsletter of IIT Chemistry. This issue cele- brates the second anniversary of the creation of the new Chemistry Division within the Department of Biological and Chemical Sciences

  17. Two (unrelated) topics in quantum transport: Evaluating centroid and ring-polymer molecular dynamics and calculating STM images for molecules on

    Geosciences Websites

    Maryland at College Park, University of

    Two (unrelated) topics in quantum transport: Evaluating centroid and ring- polymer molecular dynamics and calculating STM images for molecules on semiconductor surfaces Mark E. Tuckerman Dept. of Chemistry Courant Institute of Mathematical Sciences New York University New York, NY 10003 #12;Quantum

  18. Polymer Parametrised Field Theory

    General Relativity & Quantum Cosmology (arXiv)

    Alok Laddha; Madhavan Varadarajan

    2008-05-02

    Free scalar field theory on 2 dimensional flat spacetime, cast in diffeomorphism invariant guise by treating the inertial coordinates of the spacetime as dynamical variables, is quantized using LQG type `polymer' representations for the matter field and the inertial variables. The quantum constraints are solved via group averaging techniques and, analogous to the case of spatial geometry in LQG, the smooth (flat) spacetime geometry is replaced by a discrete quantum structure. An overcomplete set of Dirac observables, consisting of (a) (exponentials of) the standard free scalar field creation- annihilation modes and (b) canonical transformations corresponding to conformal isometries, are represented as operators on the physical Hilbert space. None of these constructions suffer from any of the `triangulation' dependent choices which arise in treatments of LQG. In contrast to the standard Fock quantization, the non- Fock nature of the representation ensures that the algebra of conformal isometries as well as that of spacetime diffeomorphisms are represented in an anomaly free manner. Semiclassical states can be analysed at the gauge invariant level. It is shown that `physical weaves' necessarily underly such states and that such states display semiclassicality with respect to, at most, a countable subset of the (uncountably large) set of observables of type (a). The model thus offers a fertile testing ground for proposed definitions of quantum dynamics as well as semiclassical states in LQG.

  19. Solvable Critical Dense Polymers

    HEP - Theory (arXiv)

    Paul A. Pearce; Jorgen Rasmussen

    2007-02-06

    A lattice model of critical dense polymers is solved exactly for finite strips. The model is the first member of the principal series of the recently introduced logarithmic minimal models. The key to the solution is a functional equation in the form of an inversion identity satisfied by the commuting double-row transfer matrices. This is established directly in the planar Temperley-Lieb algebra and holds independently of the space of link states on which the transfer matrices act. Different sectors are obtained by acting on link states with s-1 defects where s=1,2,3,... is an extended Kac label. The bulk and boundary free energies and finite-size corrections are obtained from the Euler-Maclaurin formula. The eigenvalues of the transfer matrix are classified by the physical combinatorics of the patterns of zeros in the complex spectral-parameter plane. This yields a selection rule for the physically relevant solutions to the inversion identity and explicit finitized characters for the associated quasi-rational representations. In particular, in the scaling limit, we confirm the central charge c=-2 and conformal weights Delta_s=((2-s)^2-1)/8 for s=1,2,3,.... We also discuss a diagrammatic implementation of fusion and show with examples how indecomposable representations arise. We examine the structure of these representations and present a conjecture for the general fusion rules within our framework.

  20. Finite Extension of Polymers in Turbulent Flow

    Nonlinear Sciences (arXiv)

    Jean-Luc Thiffeault

    2002-12-23

    The statistics of polymers advected by a turbulent flow are investigated. To limit the polymer lengths above to coil-stretch transition, a FENE-P type relaxation law is used. The turbulence is modeled by a random strain, delta-correlated in time and with Gaussian statistics. The distribution of polymer lengths for both the coiled and stretched states are derived, from which are obtained analytical expressions for the moments of the distribution. The polymer stress on the fluid decreases linearly with the inverse of the Deborah number. The degradation (breaking) of the polymers is also discussed, showing that even for large Deborah number some polymers can remain unbroken.

  1. Emergent tilt order in Dirac polymer liquids

    Condensed Matter (arXiv)

    Anton Souslov; Benjamin Loewe; Paul M. Goldbart

    2015-10-03

    We study a liquid of zigzagging two-dimensional directed polymers with bending rigidity, i.e., polymers whose conformations follow checkerboard paths. In the continuum limit the statistics of such polymers obey the Dirac equation for particles of imaginary mass. We exploit this observation to investigate a liquid of these polymers via a quantum many-fermion analogy. A self-consistent approximation predicts a phase of tilted order, in which the polymers may develop a preference to zig rather than zag. We compute the phase diagram and key response functions for the polymer liquid, and comment on the role played by fluctuations.

  2. Origins of Mechanical and Rheological Properties of Polymer Nanocomposites

    Geosciences Websites

    Maryland at College Park, University of

    Origins of Mechanical and Rheological Properties of Polymer Nanocomposites Venkat Ganesan $$$: NSF of Texas@Austin #12;Polymer Nanocomposites Polymers (Blends, Block copolymers) Nano-Fillers Nanocomposites Nanocomposites Polymers (Blends, Block copolymers) Nano-Fillers Nanocomposites · Processing nanocomposites

  3. RAPID COMMUNICATION Improved Optical Quality of Crosslinkable Nonlinear Polymer Waveguides

    Engineering Websites

    Chen, Ray

    RAPID COMMUNICATION Improved Optical Quality of Crosslinkable Nonlinear Polymer Waveguides; revised 15 April 1997; accepted 24 April 1997 Keywords: optical polymer films; nonlinear optical polymer; crosslinked polymer; poly- mer waveguides; solubility INTRODUCTION cyanate (Pfaltz & Bauer, Inc

  4. Conjugated Organometallic Polymers Containing Vollhardts Cyclobutadiene Complex: Aggregation and Morphologies

    Materials Science Websites

    zur Loye, Hans-Conrad

    Conjugated Organometallic Polymers Containing Vollhardts Cyclobutadiene Complex: Aggregation molecules of these polymers. Aggregation of conjugated polymers is (potential- ly) relevant to device: Organometallic polymers were prepared by acyclic diyne meta- thesis (ADIMET) or by Pd-catalyzed coupling of 1

  5. Controlled Self Assembly of Conjugated Polymer Containing Block Copolymers

    University of California eScholarship Repository

    McCulloch, Bryan

    2012-01-01

    melt: Small-angle neutron scattering of poly(benzoyl paraphenylene). Journal of Polymer Science Part B-Polymer Physicsmelt: Small-angle neutron scattering of poly(benzoyl paraphenylene). Journal of Polymer Science Part B-Polymer Physics

  6. Dynamic shear responses of polymer-polymer interfaces

    Condensed Matter (arXiv)

    Yasuya Nakayama; Kiyoyasu Kataoka; Toshihisa Kajiwara

    2012-07-17

    In multi-component soft matter, interface properties often play a key role in determining the properties of the overall system. The identification of the internal dynamic structures in non-equilibrium situations requires the interface rheology to be characterized. We have developed a method to quantify the rheological contribution of soft interfaces and evaluate the dynamic modulus of the interface. This method reveals that the dynamic shear responses of interfaces in bilayer systems comprising polypropylene and three different polyethylenes can be classified as having hardening and softening effects on the overall system: a interface between linear long polymers becomes more elastic than the component polymers, while large polydispersity or long-chain-branching of one component make the interface more viscous. We find that the chain lengths and architectures of the component polymers, rather than equilibrium immiscibility, play an essential role in determining the interface rheological properties.

  7. Polymer Welding: Strength Through Entanglements

    Condensed Matter (arXiv)

    Ting Ge; Flint Pierce; Dvora Perahia; Gary S. Grest; Mark O. Robbins

    2012-11-29

    Large-scale simulations of thermal welding of polymers are performed to investigate the rise of mechanical strength at the polymer-polymer interface with the welding time. The welding process is in the core of integrating polymeric elements into devices as well as in thermal induced healing of polymers; processes that require development of interfacial strength equal to that of the bulk. Our simulations show that the interfacial strength saturates at the bulk shear strength much before polymers diffuse by their radius of gyration. Along with the strength increase, the dominant failure mode changes from chain pullout at the interface to chain scission as in the bulk. Formation of sufficient entanglements across the interface, which we track using a Primitive Path Analysis is required to arrest catastrophic chain pullout at the interface. The bulk response is not fully recovered until the density of entanglements at the interface reaches the bulk value. Moreover, the increase of interfacial strength before saturation is proportional to the number of interfacial entanglements between chains from opposite sides.

  8. Conformational properties of compact polymers

    Condensed Matter (arXiv)

    Manfred Bohn; Dieter W. Heermann

    2009-05-06

    Monte Carlo simulations of coarse-grained polymers provide a useful tool to deepen the understanding of conformational and statistical properties of polymers both in physical as well as in biological systems. In this study we sample compact conformations on a cubic LxLxL lattice with different occupancy fractions by modifying a recently proposed algorithm. The system sizes studied extend up to N=256000 monomers, going well beyond the limits of older publications on compact polymers. We analyze several conformational properties of these polymers, including segment correlations and screening of excluded volume. Most importantly we propose a scaling law for the end-to-end distance distribution and analyze the moments of this distribution. It shows universality with respect to different occupancy fractions, i.e. system densities. We further analyze the distance distribution between intrachain segments, which turns out to be of great importance for biological experiments. We apply these new findings to the problem of chromatin folding inside interphase nuclei and show that -- although chromatin is in a compacted state -- the classical theory of compact polymers does not explain recent experimental results.

  9. Dynamics of Living Polymers

    Condensed Matter (arXiv)

    Ben O'Shaughnessy; Dimitrios Vavylonis

    2003-09-22

    We study theoretically the dynamics of living polymers which can add and subtract monomer units at their live chain ends. The classic example is ionic living polymerization. In equilibrium, a delicate balance is maintained in which each initiated chain has a very small negative average growth rate (``velocity'') just sufficient to negate the effect of growth rate fluctuations. This leads to an exponential molecular weight distribution (MWD) with mean Nbar. After a small perturbation of relative amplitude epsilon, e.g. a small temperature jump, this balance is destroyed: the velocity acquires a boost greatly exceeding its tiny equilibrium value. For epsilon > epsilon_c = 1/Nbar^{1/2} the response has 3 stages: (1) Coherent chain growth or shrinkage, leaving a highly non-linear hole or peak in the MWD at small chain lengths. During this episode, lasting time taufast ~ Nbar, the MWD's first moment and monomer concentration m relax very close to equilibrium. (2) Hole-filling (or peak decay) after taufill ~ epsilon^2 Nbar^2. The absence or surfeit of small chains is erased. (3) Global MWD shape relaxation after tauslow ~ Nbar^2. By this time second and higher MWD moments have relaxed. During episodes (2) and (3) the fast variables (Nbar,m) are enslaved to the slowly varying number of free initiators (chains of zero length). Thus fast variables are quasi-statically fine-tuned to equilibrium. The outstanding feature of these dynamics is their ultrasensitivity: despite the perturbation's linearity, the response is non-linear until the late episode (3). For very small perturbations, epsilon < epsilon_c, response remains non-linear but with a less dramatic peak or hole during episode (1). Our predictions are in agreement with viscosity measurements on the most widely studied system, alpha-methylstyrene.

  10. e-Polymers 2009, no. 103 http://www.e-polymers.org

    Materials Science Websites

    North Texas, University of

    1 e-Polymers 2009, no. 103 http://www.e-polymers.org ISSN 1618-7229 Polymer concretes improved: The well-known key problem with concrete is that its compressive strength and the compression modulus are insufficient for a variety of applications. Our polymer concrete (PC) consists of an unsaturated polyester

  11. Confining multiple polymers between sticky walls: a directed walk model of two polymers

    Mathematics Websites

    Rechnitzer, Andrew

    Confining multiple polymers between sticky walls: a directed walk model of two polymers Thomas Wong 30, 2014 Abstract We study a model of two polymers confined to a slit with sticky walls. More on the square lattice. We compare the infinite slit limit, in which the length of the polymer (thermodynamic

  12. Some Rigorous Results on Semiflexible Polymers I. Free and confined polymers

    Mathematics Websites

    Velenik, Yvan

    Some Rigorous Results on Semiflexible Polymers I. Free and confined polymers O. Hryniva , Y 4, Switzerland Abstract We introduce a class of models of semiflexible polymers. The latter, called the persistence length, being of the same order as the polymer length. We determine

  13. Elastic and Viscoelastic Properties of Non-bulk Polymer Interphases in Nanotube-reinforced Polymers

    Engineering Websites

    Fisher, Frank

    Elastic and Viscoelastic Properties of Non-bulk Polymer Interphases in Nanotube-reinforced Polymers polymer composite materials with outstanding mechanical, electrical, and thermal properties. A hurdle to nanoscale interactions between the embedded NTs and adjacent polymer chains. This interphase region

  14. Polymer Thermodynamics and Chain Structure Polymers display some similarities and some differences with nano-aggregates.

    Materials Science Websites

    Beaucage, Gregory

    with nano-aggregates. Both materials are composed of basic units, Kuhn units for polymers which are rod an aggregate in nanomaterials and a polymer coil in Polymer Science. The mass-fractal or minimum dimension of a polymer chain is determined by thermal equilibrium due to flexible covalent bonds between Kuhn units

  15. Carbon-13 Labeled Polymers: An Alternative Tracer for Depth Profiling of Polymer Films and

    Physics Websites

    Carbon-13 Labeled Polymers: An Alternative Tracer for Depth Profiling of Polymer Films profiling of polymer films and multilayers using secondary ion mass spectrometry (SIMS). Deuterium substitution has traditionally been used in depth profiling of polymers but can affect the phase behavior

  16. Dynamics of Polymers in Flowing Colloidal Suspensions

    MIT - DSpace

    Chen, Hsieh

    Using hydrodynamic simulations we examine the behavior of single polymers in a confined colloidal suspension under flow. We study the conformations of both, collapsed and noncollapsed polymers. Our results show that the ...

  17. Surface segregation of conformationally asymmetric polymer blends

    Condensed Matter (arXiv)

    Semjon Stepanow; Andrei A. Fedorenko

    2006-03-03

    We have generalized the Edwards' method of collective description of dense polymer systems in terms of effective potentials to polymer blends in the presence of a surface. With this method we have studied conformationally asymmetric athermic polymer blends in the presence of a hard wall to the first order in effective potentials. For polymers with the same gyration radius $R_g$ but different statistical segment lengths $l_{A}$ and $l_{B}$ the excess concentration of stiffer polymers at the surface is derived as $% \\delta \\rho _{A}(z=0)\\sim (l_{B}^{-2}-l_{A}^{-2}){\\ln (}R_{g}^{2}/l_{c}^{2}{)%}$, where $l_{c}$ is a local length below of which the incompressibility of the polymer blend is violated. For polymer blends differing only in degrees of polymerization the shorter polymer enriches the wall.

  18. Turbulence of polymer solutions E. Balkovsky,1

    Physics Websites

    Lebedev, Vladimir

    October 2001 We investigate high-Reynolds-number turbulence in dilute polymer solutions. We show situation of turbulence at high Reynolds numbers. Probably, the most striking effect of polymers on the high-Reynolds-number

  19. Polymer Translocation Through a Long Nanopore

    Condensed Matter (arXiv)

    Elena Slonkina; Anatoly B. Kolomeisky

    2002-09-05

    Polymer translocation through a nanopore in a membrane investigated theoretically. Recent experiments on voltage-driven DNA and RNA translocations through a nanopore indicate that the size and geometry of the pore are important factors in polymer dynamics. A theoretical approach is presented which explicitly takes into account the effect of the nanopore length and diameter for polymer motion across the membrane. It is shown that the length of the pore is crucial for polymer translocation dynamics. The present model predicts that for realistic conditions (long nanopores and large external fields) there are two regimes of translocation depending on polymer size: for polymer chains larger than the pore length, the velocity of translocation is nearly constant, while for polymer chains smaller than the pore length the velocity increases with decreasing polymer size. These results agree with experimental data.

  20. Topological Constraints in Directed Polymer Melts

    MIT - DSpace

    Serna, Pablo

    Polymers in a melt may be subject to topological constraints, as in the example of unlinked polymer rings. How to do statistical mechanics in the presence of such constraints remains a fundamental open problem. We study ...

  1. Polymer Surface Modification for Bioengineering Applications

    University of California eScholarship Repository

    Cheng, Qian

    2011-01-01

    polymer structures in tissue engineering and drug deliverytissue engineering and drug delivery. Polymer scaffolds withpolymers with microstructures are getting more and more attention in tissue engineering and drug delivery

  2. Cooperative Behaviour of Semiflexible Polymers and Filaments

    Materials Science Websites

    Kierfeld, Jan

    Cooperative Behaviour of Semiflexible Polymers and Filaments Jan Kierfeld, Pavel Kraikivski, 14424 Potsdam, Germany Summary. Semiflexible polymers and filaments play an important role in biological and chemical physics. The cooperative behaviour of interacting filaments and the internal bending modes

  3. Configurations of polymers attached to probes

    MIT - DSpace

    Bubis, Roy

    We study polymers attached to spherical (circular) or paraboloidal (parabolic) probes in three (two) dimensions. Both self-avoiding and random walks are examined numerically. The behavior of a polymer of size R[subscript ...

  4. Polymer-based photonic integrated circuits

    Engineering Websites

    Chen, Ray

    lens, and rare-earth ion-doped polymer waveguide amplifiers. A single-mode linear channel waveguide modulator with 40 GHz electrical bandwidth is further delineated. A rare-earth ion-doped polymer waveguide

  5. The challenges of organic polymer solar cells

    MIT - DSpace

    Saif Addin, Burhan K. (Burhan Khalid)

    2011-01-01

    The technical and commercial prospects of polymer solar cells were evaluated. Polymer solar cells are an attractive approach to fabricate and deploy roll-to-roll processed solar cells that are reasonably efficient (total ...

  6. Unwinding relaxation dynamics of polymers

    Condensed Matter (arXiv)

    Jean-Charles Walter; Marco Baiesi; Gerard Barkema; Enrico Carlon

    2013-01-13

    The relaxation dynamics of a polymer wound around a fixed obstacle constitutes a fundamental instance of polymer with twist and torque and it is of relevance also for DNA denaturation dynamics. We investigate it by simulations and Langevin equation analysis. The latter predicts a relaxation time scaling as a power of the polymer length times a logarithmic correction related to the equilibrium fluctuations of the winding angle. The numerical data support this result and show that at short times the winding angle decreases as a power-law. This is also in agreement with the Langevin equation provided a winding-dependent friction is used, suggesting that such reduced description of the system captures the basic features of the problem.

  7. Polymers grafted to porous membranes

    Condensed Matter (arXiv)

    Hsiao-Ping Hsu; Peter Grassberger

    2006-08-22

    We study a single flexible chain molecule grafted to a membrane which has pores of size slightly larger than the monomer size. On both sides of the membrane there is the same solvent. When this solvent is good, i.e. when the polymer is described by a self avoiding walk, it can fairly easily penetrate the membrane, so that the average number of membrane crossings tends, for chain length $N\\to\\infty$, to a positive constant. The average numbers of monomers on either side of the membrane diverges in this limit, although their ratio becomes infinite. For a poor solvent, in contrast, the entire polymer is located, for large $N$, on one side of the membrane. For good and for theta solvents (ideal polymers) we find scaling laws, whose exponents can in the latter case be easily understood from the behaviour of random walks.

  8. Polymer transport in random flow

    Nonlinear Sciences (arXiv)

    A. Celani; S. Musacchio; D. Vincenzi

    2004-10-19

    The dynamics of polymers in a random smooth flow is investigated in the framework of the Hookean dumbbell model. The analytical expression of the time-dependent probability density function of polymer elongation is derived explicitly for a Gaussian, rapidly changing flow. When polymers are in the coiled state the pdf reaches a stationary state characterized by power-law tails both for small and large arguments compared to the equilibrium length. The characteristic relaxation time is computed as a function of the Weissenberg number. In the stretched state the pdf is unstationary and exhibits multiscaling. Numerical simulations for the two-dimensional Navier-Stokes flow confirm the relevance of theoretical results obtained for the delta-correlated model.

  9. Event distributions of polymer translocation

    CERN Preprints

    Linna, R P

    2011-01-01

    We present event distributions for the polymer translocation obtained by extensive Langevin dynamics simulations. Such distributions have not been reported previously and they provide new understanding of the stochastic characteristics of the process. We extract at a high length scale resolution distributions of polymer segments that continuously traverse through a nanoscale pore. The obtained log-normal distribution defines both unforced and forced translocation as multiplicative stochastic processes. In spite of its clear out-of-equilibrium nature the forced translocation is surprisingly similar to the unforced case. We find forms for the distributions almost unaltered with a common cut-off length. We show that the scaling relations $\\tau \\sim N^\\alpha$ and $\\tau \\sim f^{-\\beta}$ can be determined by merely counting the individual short-range and short-time events of segments moving inside the pore. The results have significance for DNA sequencing and are useful in determining correct models for the polymer...

  10. CHEMISTRY & CHEMICAL TECHNOLOGY Vol. 2, No. l, 2008 Chemistrv

    Materials Science Websites

    North Texas, University of

    CHEMICAL MODIFICATION AND CHARACTERIZATION OF BOEHMITE PARTICLES Laboratory of Advanced Polymers- includingthose containingceramicoxides- in thedevelopmentof polymer composites[]. Onethusobtainscompositeswith theongoingprocessof gradual replacementof metalliccomponentsby polymer-based ones.Thelatterareweakmechanically[2

  11. Multiscale modelling of polymer structure and conformations in polymer nanocomposites: A Review

    Condensed Matter (arXiv)

    Argyrios Karatrantos

    2015-04-05

    Over the past two decades polymer nanocomposites have received tremendous interest from industry and academia due to their advanced properties comparative to polymer blends. Many computational studies have revealed that the macroscopic properties of polymer nanocomposites depend strongly on the microscopic polymer structure and conformations. In this article we review simulation studies of the fundamental problem of polymer structure and dimensions in nanocomposites containing bare spherical or rod nanoparticles. Experimentally, there is controversy over whether the addition of nanoparticles in a polymer matrix can perturb the polymer chains.

  12. The structure of colloid-polymer mixtures

    Condensed Matter (arXiv)

    A. A. Louis; R. Finken; J-P. Hansen

    1999-04-15

    We investigate the structure of colloid-polymer mixtures by calculating the structure factors for the Asakura-Oosawa model in the PY approximation. We discuss the role of potential range, polymer concentration and polymer-polymer interactions on the colloid-colloid structure. Our results compare reasonably well with the recent experiments of Moussa\\"{i}d et. al. for small wavenumber $k$, but we find that the Hansen-Verlet freezing criterion is violated when the liquid phase becomes marginal.

  13. Academic Chemistry Inputs and Outcomes Data

    University of Kansas - KU ScholarWorks

    Rosenbloom, Joshua L.; Ginther, Donna K.; Juhl, Ted P.; Heppert, Joseph A.

    2015-07-17

    stream_size 16447 stream_content_type text/plain stream_name ChemistryInputsOutcomes_Codebook.pdf.txt stream_source_info ChemistryInputsOutcomes_Codebook.pdf.txt Content-Encoding UTF-8 Content-Type text/plain; charset=UTF-8... Data Description and Code Book for Academic Chemistry Inputs and Outcomes Data Set Joshua L. Rosenbloom1 Donna K. Ginther2 Ted Juhl2 Joseph Heppert3 1 Department of...

  14. Making Lasting Bonds Through Synthetic Chemistry Tim Hubin and William Kelly

    Chemistry Websites

    Hubin, Tim

    of Synthetic Organic and Inorganic Chemistry; and (2) to produce publishable quality novel research results: General Field: Chemistry Specific Fields: Organic Chemistry; Inorganic Chemistry; Synthetic Chemistry1 Making Lasting Bonds Through Synthetic Chemistry Tim Hubin and William Kelly Southwestern

  15. Chemistry Minor Program Sheet Code: xxx-150 Student Name: __________________________________ Student ID# (last 4 digits): ____________________

    Engineering Websites

    Sun, Yi

    Chemistry II & Lab 4 (Chem 10301) [ ] _________ Chemistry Minor Requirements 26100 Organic Chemistry I 3 (Chem 10401) [ ] _________ 26200 Organic Chemistry Lab I 3 (Chem 26100) [ ] _________ 26300 Organic Organic Chemistry (Prereq: Chem 26100) 42500 Inorganic Chemistry 3 (Prereq: Chem 263 & 33000

  16. Automatic Coarse Graining of Polymers

    Condensed Matter (arXiv)

    Roland Faller

    2003-11-14

    Several recently proposed semi--automatic and fully--automatic coarse--graining schemes for polymer simulations are discussed. All these techniques derive effective potentials for multi--atom units or super--atoms from atomistic simulations. These include techniques relying on single chain simulations in vacuum and self--consistent optimizations from the melt like the simplex method and the inverted Boltzmann method. The focus is on matching the polymer structure on different scales. Several ways to obtain a time-scale for dynamic mapping are discussed additionally. Finally, similarities to other simulation areas where automatic optimization are applied as well are pointed out.

  17. Star polymers in correlated disorder

    Condensed Matter (arXiv)

    V. Blavats'ka; C. von Ferber; Yu. Holovatch

    2007-11-23

    We analyze the impact of a porous medium (structural disorder) on the scaling of the partition function of a star polymer immersed in a good solvent. We show that corresponding scaling exponents change if the disorder is long-range-correlated and calculate the exponents in the new universality class. A notable finding is that star and chain polymers react in qualitatively different manner on the presence of disorder: the corresponding scaling exponents increase for chains and decrease for stars. We discuss the physical consequences of this difference.

  18. Adsorption of polymers at nanowires

    Condensed Matter (arXiv)

    Thomas Vogel; Michael Bachmann

    2011-03-09

    Low-energy structures of a hybrid system consisting of a polymer and an attractive nanowire substrate as well as the thermodynamics of the adsorption transition are studied by means of Monte Carlo computer simulations. Depending on structural and energetic properties of the substrate, we find different adsorbed polymer conformations, amongst which are spherical droplets attached to the wire and monolayer tubes surrounding it. We identify adsorption temperatures and the type of the transition between adsorbed and desorbed structures depending on the substrate attraction strength.

  19. Intermolecular Adhesion in Conjugated Polymers

    Condensed Matter (arXiv)

    Jeremy D. Schmit; Alex J. Levine

    2006-10-25

    Conjugated polymers are observed to aggregate in solution. To account for this observation we propose a inter-chain binding mechanism based on the intermolecular tunneling of the delocalized $\\pi$-electrons occurring at points where the polymers cross. This tunneling mechanism predicts specific bound structures of chain that depend on whether they are semiconducting or metallic. Semiconducting chains should form polyacene-like states exhibiting binding at every other site, while (doped) metallic chains can bind at each site. We also show that solitons co-localize with the intermolecular binding sites thereby strengthening the binding effect and investigate the conformational statistics of the resulting bimolecular aggregates.

  20. Polymer Adsorption on Fractal Walls

    Condensed Matter (arXiv)

    G. Giugliarelli; A. L. Stella

    1999-01-27

    Polymer adsorption on fractally rough walls of varying dimensionality is studied by renormalization group methods on hierarchical lattices. Exact results are obtained for deterministic walls. The adsorption transition is found continuous for low dimension $d_w$ of the adsorbing wall and the corresponding crossover exponent $\\phi$ monotonically increases with $d_w$, eventually overcoming previously conjectured bounds. For $d_w$ exceeding a threshold value $d_w^*$, $\\phi$ becomes 1 and the transition turns first--order. $d_w^*>d_{saw}$, the fractal dimension of the polymer in the bulk. An accurate numerical approach to the same problem with random walls gives evidence of the same scenario.

  1. Surface chemistry of solid and liquid interfaces

    CERN Preprints

    Erbil, Husnu Yildirim

    2009-01-01

    A detailed understanding of the chemistry of surfaces and interfaces is required by many research personnel in the chemical and life science industries, as surfaces and interfaces play a critical role in many of the processes they seek to influence.Surface Chemistry of Solid and Liquid Interfaces provides a concise and easily accessible introduction to this fascinating subject. With a smooth evolution of ideas from familiar physical chemistry principles, the student can develop a sophisticated understanding of the chemistry of surfaces and interfaces. The book is also highly relevant to new re

  2. Density functional theory in quantum chemistry

    CERN Preprints

    Tsuneda, Takao

    2014-01-01

    In this book, density functional theory (DFT) is introduced within the overall context of quantum chemistry. DFT has become the most frequently used theory in quantum chemistry calculations. However, thus far, there has been no book on the fundamentals of DFT that uses the terminology and methodology of quantum chemistry, which is familiar to many chemists, including experimentalists. This book first reviews the basic concepts and historical background of quantum chemistry and then explains those of DFT, showing how the latter fits into the bigger picture. Recent interesting topics of DFT in c

  3. Coordination Chemistry Reviews 190192 (1999) 2945

    Renewable Energy Websites

    1999-01-01

    . Welch, Joseph T. Hupp * Department of Chemistry and Materials Research Center, Northwestern Uni6ersity could be qualitatively correlated with thermodynamic stability, as indicated by binding constants

  4. Supramolecular Polymer Nanocomposites Improvement of Mechanical Properties

    Materials Science Websites

    Petta, Jason

    Supramolecular Polymer Nanocomposites ­ Improvement of Mechanical Properties Jesse Hinricher, Colin · Napy: D-A-A-D · UPy: A-D-D-A Schematic of Supramolecular Polymer Nanocomposite The effect on mechanical Goals To improve mechanical properties of supramolecular polymers via nanocomposite (NC) formation. Both

  5. Polymers in a Vacuum J. M. Deutsch

    Physics Websites

    Deutsch, Josh

    Polymers in a Vacuum J. M. Deutsch Department of Physics, University of California, Santa Cruz polymer molecules are found in a vacuum, and here we examine their properties. Angular momentum The properties of polymer chains have been investigated extensively over the past 50 years [1], but the vast

  6. Polymer microcantilevers fabricated via multiphoton absorption polymerization

    Biology and Medicine Websites

    Teich, Malvin C.

    Polymer microcantilevers fabricated via multiphoton absorption polymerization Z. Bayindir, Y. Sun polymer cantilevers. Atomic force microscopy has been used to characterize the mechanical properties orders of magnitude smaller than would be predicted from the properties of the bulk polymer.6 If correct

  7. Morphology and Charge Transport in Conjugated Polymers

    Materials Science Websites

    McGehee, Michael

    Morphology and Charge Transport in Conjugated Polymers R. J. KLINE AND M. D. McGEHEE Department charge transport and morphology is key to increasing the charge carrier mobility of conjugated polymers to provide insight into how the charge carriers move through a conjugated polymer film and provide a model

  8. Selfattractive random polymers Remco van der Hofstad

    Mathematics Websites

    Klenke, Achim

    Self­attractive random polymers Remco van der Hofstad Stieltjes Institute of Mathematics Delft polymer of finite length in Zd . Its law is that of a finite simple random walk path in Zd receiving that for > the attraction dominates the repulsion, i.e., with high probability the polymer is contained in a finite box

  9. New and Notable How Polymers Translocate

    Chemistry Websites

    New and Notable How Polymers Translocate Through Pores: Memory is Important Anatoly B. Kolomeisky cellular membranes, involve the motion of polymer molecules across nar- row channels (1). Translocation the entropic barriers. These barriers ap- pear due to the decrease in the number of available polymer

  10. Communications Self-Assembled Nanocomposite Polymer Light-

    Physics Websites

    Carter, Sue

    emission.[6] In this paper, we show that nanopar- ticles assembled at a semiconducting polymer/electrode inCommunications Self-Assembled Nanocomposite Polymer Light- Emitting Diodes with Improved Efficiency- tronics applications because they combine the advantages of organic polymers with those of inorganic

  11. Entropy and entanglement in polymer quantization

    CERN Preprints

    Demarie, Tommaso F

    2013-01-01

    Polymer quantization is as a useful toy model for the mathematical aspects of loop quantum gravity and is interesting in its own right. Analyzing entropies in the standard Hilbert space and the polymer Hilbert space we show that they converge in the limit of vanishing polymer scale. We derive a general bound that relates entropies of physically equivalent states in unitarily inequivalent representations.

  12. Modeling and optimization of Interpenetrating polymer

    Chemistry Websites

    Grossmann, Ignacio E.

    Modeling and optimization of Interpenetrating polymer network process 1 CMU: Weijie Lin, Lorenz T Interpenetrating polymer network (IPN) · IPN ­ A combination of two polymers in a network form · An effective way to design new materials ­ Key characteristic : Tough & flexible · High value material Huge market industry 3

  13. Bridge Hopping on Conducting Polymers in Solution

    Condensed Matter (arXiv)

    Daniel W. Hone; Henri Orland

    2000-10-06

    Configurational fluctuations of conducting polymers in solution can bring into proximity monomers which are distant from each other along the backbone. Electrons can hop between these monomers across the "bridges" so formed. We show how this can lead to (i) a collapse transition for metallic polymers, and (ii) to the observed dramatic efficiency of acceptor molecules for quenching fluorescence in semiconducting polymers.

  14. Comb-like polymers inside nanoscale pores

    Condensed Matter (arXiv)

    Cyprien Gay; Elie Raphael

    2000-12-14

    A new method of polymer characterization, based on permeation studies using nanoscale pores, was recently proposed by Brochard and de Gennes. In the present paper, we study how this method, initially developped for star polymers can be extended to comb-like polymers.

  15. SIMS depth profiling of deuterium labeled polymers in polymer multilayers

    Physics Websites

    made with the development of the low energy (%1.3 MeV) and ToF (%2.0 MeV) FRES techniques (low impact energies [7]. With polymers, problems associated with charge neutralization arise with low impact energies [6

  16. Quantum Chemistry at Finite Temperature

    Condensed Matter (arXiv)

    Liqiang Wei

    2006-05-23

    In this article, we present emerging fields of quantum chemistry at finite temperature. We discuss its recent developments on both experimental and theoretical fronts. First, we describe several experimental investigations related to the temperature effects on the structures, electronic spectra, or bond rupture forces for molecules. These include the analysis of the temperature impact on the pathway shifts for the protein unfolding by atomic force microscopy (AFM), the temperature dependence of the absorption spectra of electrons in solvents, and the temperature influence over the intermolecular forces measured by the AFM. On the theoretical side, we review advancements made by the author in the coming fields of quantum chemistry at finite temperature. Starting from the Bloch equation, we have derived the sets of hierarchy equations for the reduced density operators in both canonical and grand canonical ensembles. They provide a law according to which the reduced density operators vary in temperature for the identical and interacting many-body systems. By taking the independent particle approximation, we have solved the equations in the case of a grand canonical ensemble, and obtained an energy eigenequation for the molecular orbitals at finite temperature. The explicit expression for the temperature-dependent Fock operator is also given. They form a mathematical foundation for the examination of the molecular electronic structures and their interplay with finite temperature. Moreover, we clarify the physics concerning the temperature effects on the electronic structures or processes of the molecules, which is crucial for both theoretical understanding and computation. Finally, ....

  17. A fast stratospheric ozone chemistry schemeA fast stratospheric ozone chemistry scheme Michel Bourqui1

    Geosciences Websites

    Bourqui, Michel

    A fast stratospheric ozone chemistry schemeA fast stratospheric ozone chemistry scheme Michel a computationally efficient chemical scheme, the FAst STratospheric Ozone Chemistry (FASTOC) scheme, which has used as a box model Original box model JanuaryJuly Units: Percent per day Ozone column Ozone mixing

  18. Proposed Sample Program for UCI Chemistry Majors with an Interest in Chemical Physics and Physical Chemistry*@

    Engineering Websites

    Chen, Zhongping

    Proposed Sample Program for UCI Chemistry Majors with an Interest in Chemical Physics and Physical Chemistry*@ Items in parentheses are recommended choices or alternatives. Fall Winter Spring Freshman Chem Chemistry 128 or Biological Sciences 98; and two additional laboratory courses from the following list

  19. Chemistry 6485: Computational Chemistry Meetings: MWF 9:05-9:55, MS&E 1224

    Chemistry Websites

    Sherrill, David

    Chemistry 6485: Computational Chemistry Instructor Meetings: MWF 9:05-9:55, MS&E 1224 Office Hours This introductory course in computational chemistry will discuss molecular mechanics, semiempir- ical projects related to their own research if possible. The course will highlight the computational algorithms

  20. Proposed Sample Program for UCI Chemistry Major with Interests in Theoretical and/or Computational Chemistry*@

    Biology and Medicine Websites

    Chen, Zhongping

    Proposed Sample Program for UCI Chemistry Major with Interests in Theoretical and/or Computational Chemistry*@ Items in parentheses are recommended choices or alternatives. Fall Winter Spring Freshman Chem, the program must include Chemistry 128 or Biological Sciences 98; and two additional laboratory courses from