Part A. Neutron activation analysis of selenium and vanadium in biological matrices. Part B. Isomeric transition activation in aqueous solutions of alkyl bromides

Thesis/Dissertation · Thu Dec 31 23:00:00 EST 1987

OSTI ID:7067413

Ebrahim, A

Several procedures were evaluated for determination of selenium in biological fluids and vanadium in biological tissues by neutron activation analysis (NAA) employing {sup 77m}Se and {sup 52}V isotopes, respectively. Procedures for determination of total selenium, trimethylselenonium (TMSe) ion and selenite (SeO{sub 3}{sup 2{minus}}) ion in urine and serum and for total selenoamino acids in urine were developed by utilizing anion exchange chromatography and molecular NAA. A pre-column derivatization of selenoamino acids with o-phthalaldehyde was necessary for their determination. Also an analytical approach was developed for determination of trace vanadium in liver samples from normal and diabetic rats as well as human and cow. Reactions of bromine-80 activated by radiative neutron capture and bromine-82 activated by isomeric transition were investigated in aqueous solutions of bromomethane and 1-bromobutane. Bromine-80 organic yields decreased with decreasing solute concentrations. The tendency for aggregation of the solute molecules diminished as the solute concentration approached zero where the probable state of the solute approached a monomolecular dispersion. Unlike reactions of {sup 80}Br born by {sup 79}Br(n,{gamma}){sup 80}Br reaction, the total organic product yields resulting from the {sup 82m}Br(I.T.){sup 82}Br process showed no solute concentration dependence.

• Research Organization: Nebraska Univ., Lincoln, NE (USA)
• OSTI ID: 7067413
• Country of Publication: United States
• Language: English

Related Subjects

550501 -- Metabolism-- Tracer Techniques
560300* -- Chemicals Metabolism & Toxicology
59 BASIC BIOLOGICAL SCIENCES
63 RADIATION, THERMAL, AND OTHER ENVIRON. POLLUTANT EFFECTS ON LIVING ORGS. AND BIOL. MAT.
ACTIVATION ANALYSIS
ALKALINE EARTH METALS
ANIMALS
AQUEOUS SOLUTIONS
BARYON REACTIONS
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BETA-PLUS DECAY RADIOISOTOPES
BROMINE 79
BROMINE 80
BROMINE 82
BROMINE ISOTOPES
CATTLE
CHEMICAL ANALYSIS
CHROMATOGRAPHY
DAYS LIVING RADIOISOTOPES
DISPERSIONS
DISTRIBUTION
DOMESTIC ANIMALS
ELECTRON CAPTURE RADIOISOTOPES
ELEMENTS
EVEN-ODD NUCLEI
HADRON REACTIONS
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
INTERNAL CONVERSION RADIOISOTOPES
ION EXCHANGE CHROMATOGRAPHY
ISOMERIC NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPE APPLICATIONS
ISOTOPES
MAMMALS
MAN
METABOLISM
METALS
MINUTE
MINUTES LIVING RADIOISOTOPES
MIXTURES
NEUTRON REACTIONS
NUCLEAR REACTIONS
NUCLEI
NUCLEON REACTIONS
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
PRIMATES
RADIOISOTOPES
RATS
RODENTS
RUMINANTS
SECONDS LIVING RADIOISOTOPES
SELENIUM 77
SELENIUM ISOTOPES
SEPARATION PROCESSES
SOLUTIONS
STABLE ISOTOPES
STRONTIUM
TISSUE DISTRIBUTION
TRACER TECHNIQUES
TRANSITION ELEMENTS
VANADIUM
VANADIUM 52
VANADIUM ISOTOPES
VERTEBRATES