Publication

Physical-chemical Modification of Sodium Alginate ALGIMAR by Irradiation

Jutta Christine Wandrey, Dianelys Sainz Vidal
2004
Journal Articles

Abstract

The effect of gamma radiation on the physical-chemical properties of sodium alginate Algimar has been investigated. Dilution viscometry, densitometry, and FTIR spectroscopy served to identify modifications. Decreasing intrinsic viscosities clearly revealed chain cleavage for both solid alginate and alginate in aqueous solution. The invariance of the partial specific volume and infrared results indicate that chain degradation occurs without significant change of the chemical structure. The obtained results have practical implication in the field of radiation modification and sterilization of sodium alginate used for microcapsule formation.

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https://infoscience.epfl.ch/entities/publication/31a18e8b-afb6-45e4-88c0-a20e19d15fb5

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Jutta Christine Wandrey, Dianelys Sainz Vidal
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/31a18e8b-afb6-45e4-88c0-a20e19d15fb5

About this result

Related concepts (32)

Ionizing radiation

Ionizing radiation (or ionising radiation), including nuclear radiation, consists of subatomic particles or electromagnetic waves that have sufficient energy to ionize atoms or molecules by detaching electrons from them. Some particles can travel up to 99% of the speed of light, and the electromagnetic waves are on the high-energy portion of the electromagnetic spectrum. Gamma rays, X-rays, and the higher energy ultraviolet part of the electromagnetic spectrum are ionizing radiation, whereas the lower energy ultraviolet, visible light, nearly all types of laser light, infrared, microwaves, and radio waves are non-ionizing radiation.

Chemical property

A chemical property is any of a material's properties that becomes evident during, or after, a chemical reaction; that is, any quality that can be established only by changing a substance's chemical identity. Simply speaking, chemical properties cannot be determined just by viewing or touching the substance; the substance's internal structure must be affected greatly for its chemical properties to be investigated. When a substance goes under a chemical reaction, the properties will change drastically, resulting in chemical change.

Irradiation

Irradiation is the process by which an object is exposed to radiation. An irradiator is a device used to expose an object to radiation, notably gamma radiation, for a variety of purposes. Irradiators may be used for sterilizing medical and pharmaceutical supplies, preserving foodstuffs, alteration of gemstone colors, studying radiation effects, eradicating insects through sterile male release programs, or calibrating thermoluminescent dosimeters (TLDs). The exposure can originate from various sources, including natural sources.

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Physical-chemical Modification of Sodium Alginate ALGIMAR by Irradiation

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