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Radiation Processing of Marine Algal Polysaccharides for Agriculture, as Plant Growth Promoters & Preservation of Foods and Health Care Products as Instant Hydrogel Formulations for Improved Mucose Adhesion and Medical Applications

Abstract

Characterization of the bulk material for degradation and/or structure modification in grafting procedures during this period was continued They were characterized by ultra-violet and visible (UV-vis) and Fourier transform infra- red spectroscopy (FTIR). After receiving the chitosan sample from Prof. Dr Rosiak we started the duty of harmonization procedures for the characterization of raw materials in terms of molecular weight determination by viscosity and to proceed with the measurements of samples of alginates and carrageenans For investigation of radiation–processed alginates for agriculture applications degraded polymers were used as plant growth promoters, in different crops, such as tomato, lettuce, spinach and cabbage under different environmental conditions. By irradiation of alginates with various radiation doses (500, 750 and 1000 kGy gamma rays) degraded alginates have been obtained. They have been applied in horticultural species in 20 and 100 microgram/l concentrations, in solution state (under hydroponics cultivation condition) and by foliar spraying (under soil less culture). In a preliminary phase of this study, different alginate treatments (radiation doses and concentrations) were applied to determine the effect on seedlings quality, evaluated through leaf and root development, shoot/root ratio and photosynthetic activity. UV-vis spectroscopy of alginate irradiated at very high doses ( up to 1000  More>>
Authors:
Smolko, Eduardo E.; Cerchietti, Luciana; [1]  Clozza, Mario; Giardina, Ernesto B.; Villela, Fernando; Divo, Marta D. [2] 
  1. Comisión Nacional de Energía Atómica, Centro Atómico Ezeiza, Laboratorio de Polímeros (Argentina)
  2. Univ. de Buenos Aires, Fac. de Agronomía, Departamento de Producción Vegetal (Argentina)
Publication Date:
Jul 01, 2010
Product Type:
Conference
Report Number:
IAEA-RC-1091.2
Resource Relation:
Conference: 2. research coordination meeting on development of radiation-processed products of natural polymers for application in agriculture, healthcare, industry and environment, Reims (France), 12-16 Oct 2009; Other Information: 2 figs., tabs., 1 photo; Related Information: In: Report of the 2nd RCM on development of radiation-processed products of natural polymers for application in agriculture, healthcare, industry and environment. Working Material| 226 p.
Subject:
60 APPLIED LIFE SCIENCES; ABSORPTION; AGRICULTURE; ALGINATES; ALGINIC ACID; AMINO ACIDS; BRASSICA; CARBON; COLOR MODEL; CONCENTRATION RATIO; CROPS; CULTIVATION; ECOLOGICAL CONCENTRATION; FOURIER TRANSFORMATION; GAMMA RADIATION; GLYCOSIDES; GRAFTS; INFRARED SPECTRA; IRRADIATION; LEAVES; LETTUCE; MATHEMATICAL SOLUTIONS; OLIGOSACCHARIDES; OXYGEN; POLYMERS; PROMOTERS; RADIATION DOSES; RAW MATERIALS; SEEDLINGS; SOILS; SPINACH; TOMATOES
OSTI ID:
22309160
Research Organizations:
International Atomic Energy Agency, Division of Physical and Chemical Science, Vienna (Austria)
Country of Origin:
IAEA
Language:
English
Other Identifying Numbers:
TRN: XA14M3074015333
Availability:
Available from INIS in electronic form. Also available on-line: http://www-naweb.iaea.org/napc/iachem/meetings/RCMs/RC-1091-2_report_complete.pdf
Submitting Site:
INIS
Size:
page(s) 37-45
Announcement Date:
Feb 27, 2015

Citation Formats

Smolko, Eduardo E., Cerchietti, Luciana, Clozza, Mario, Giardina, Ernesto B., Villela, Fernando, and Divo, Marta D. Radiation Processing of Marine Algal Polysaccharides for Agriculture, as Plant Growth Promoters & Preservation of Foods and Health Care Products as Instant Hydrogel Formulations for Improved Mucose Adhesion and Medical Applications. IAEA: N. p., 2010. Web.
Smolko, Eduardo E., Cerchietti, Luciana, Clozza, Mario, Giardina, Ernesto B., Villela, Fernando, & Divo, Marta D. Radiation Processing of Marine Algal Polysaccharides for Agriculture, as Plant Growth Promoters & Preservation of Foods and Health Care Products as Instant Hydrogel Formulations for Improved Mucose Adhesion and Medical Applications. IAEA.
Smolko, Eduardo E., Cerchietti, Luciana, Clozza, Mario, Giardina, Ernesto B., Villela, Fernando, and Divo, Marta D. 2010. "Radiation Processing of Marine Algal Polysaccharides for Agriculture, as Plant Growth Promoters & Preservation of Foods and Health Care Products as Instant Hydrogel Formulations for Improved Mucose Adhesion and Medical Applications." IAEA.
@misc{etde_22309160,
title = {Radiation Processing of Marine Algal Polysaccharides for Agriculture, as Plant Growth Promoters & Preservation of Foods and Health Care Products as Instant Hydrogel Formulations for Improved Mucose Adhesion and Medical Applications}
author = {Smolko, Eduardo E., Cerchietti, Luciana, Clozza, Mario, Giardina, Ernesto B., Villela, Fernando, and Divo, Marta D.}
abstractNote = {Characterization of the bulk material for degradation and/or structure modification in grafting procedures during this period was continued They were characterized by ultra-violet and visible (UV-vis) and Fourier transform infra- red spectroscopy (FTIR). After receiving the chitosan sample from Prof. Dr Rosiak we started the duty of harmonization procedures for the characterization of raw materials in terms of molecular weight determination by viscosity and to proceed with the measurements of samples of alginates and carrageenans For investigation of radiation–processed alginates for agriculture applications degraded polymers were used as plant growth promoters, in different crops, such as tomato, lettuce, spinach and cabbage under different environmental conditions. By irradiation of alginates with various radiation doses (500, 750 and 1000 kGy gamma rays) degraded alginates have been obtained. They have been applied in horticultural species in 20 and 100 microgram/l concentrations, in solution state (under hydroponics cultivation condition) and by foliar spraying (under soil less culture). In a preliminary phase of this study, different alginate treatments (radiation doses and concentrations) were applied to determine the effect on seedlings quality, evaluated through leaf and root development, shoot/root ratio and photosynthetic activity. UV-vis spectroscopy of alginate irradiated at very high doses ( up to 1000 kGy) showed an abrupt change in the macroscopic shape of the sample forming hard particles and shifting the absorbing band to a higher wavelength. Alginates irradiated in solution shows an absorption band at 265 nm approximately and increases steadily with dose. Alginates irradiated in solid state shows also the absorption band at 265 and increases with doses but this band disappears at higher dose and shows a new wider band at 427 nm. Degradation was also observed accompanied by a color change to deep brown for highly degraded alginate. A conclusion from the color forming phenomena is that for lower doses the double bond formed after degradation can be established between the carbons 4 and 5 of the pyranose ring but for higher dose the double bond could be formed between the carbon 1 and the oxygen 1 of the glycoside bond giving a different terminal reactive species. In the grafting study of alginic acid-g-acrilic acid we consider highly probably demonstrated the modification of the structure by grafting for a new absorption band located at 1727 (1/cm) that corresponds also to a band found also in poly- methylmethacrylate and polyacrilic acid. (author)}
place = {IAEA}
year = {2010}
month = {Jul}
}