Degradation of antibiotic Cephalosporin C in different water matrices by ionizing radiation: Degradation kinetics, pathways, and toxicity

Abstract Radiation preservation of objects of historical significance is an interesting proposition for museums, archives, libraries and private collectors. In this paper, we have limited ourselves to studying the effects of ionizing radiation on the paper. The radiation resistance of various grades of paper was examined in INCT. Irradiations were done by electron beam (10 MeV, 10 kW) and by gamma radiation (7 kG/h), for the purpose of comparison. Yields of hydrogen and absorption of oxygen were determined by gas chromatography (GC). For this purpose, the first time in an original way was used diffuse reflection spectroscopy (DRS). Described as the dose, dose rate, and lignin were found to affect degradation processes of cellulose. Examined the protective effect of lignin in the process of radiation degradation of paper. Proposed research methodology can be successfully applied to study other materials relevant to the conservation of works of art.

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Characterization method for ionizing radiation degradation in power MOSFETs

IEEE Transactions on Nuclear Science ◽

10.1109/23.488758 ◽

1995 ◽

Vol 42 (6) ◽

pp. 1622-1627 ◽

Cited By ~ 14

Author(s):

M. de la Bardonnie ◽

A. Maouad ◽

P. Mialhe ◽

O. Elmazria ◽

A. Hoffmann ◽

...

Keyword(s):

Ionizing Radiation ◽

Power Mosfets ◽

Radiation Degradation

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Radiation Degradation Modeling of Bipolar Operational Amplifier Input Offset Voltage in LTSpice IV

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.565.138 ◽

2014 ◽

Vol 565 ◽

pp. 138-141 ◽

Cited By ~ 2

Author(s):

A.S. Bakerenkov ◽

V.S. Pershenkov ◽

A.V. Solomatin ◽

V.V. Belyakov ◽

V.V. Shurenkov

Keyword(s):

Ionizing Radiation ◽

Integrated Circuits ◽

Operational Amplifier ◽

Dose Dependence ◽

Space Mission ◽

Electronic Equipment ◽

Operational Amplifiers ◽

Offset Voltage ◽

Voltage Drift ◽

Radiation Degradation

Integrated circuits are used in electronic equipment of spaceships. Therefore, they are impacted by ionizing radiation during space mission. It leads to electronic equipment failures. At present operational amplifiers are base elements of analog electronic devices. Radiation impact leads to degradation of operational amplifiers input stages. Input bias current increasing and input offset voltage drifts are the results of ionizing radiation expose of operational amplifiers. Therefore, space application electronic equipment fails after accumulation of limit dose. It isn’t difficult to estimate radiation degradation of input bias currents of bipolar operational amplifiers, but estimation of dose dependence of input offset voltage drift is more complex issue. Schematic modeling technique based on Gummel–Poon transistor model for estimation of input offset voltage drift produced by space radiation impact was experimentally verified for LM324 operational amplifier and presented in this work. Radiation sensitive parameters of Gummel–Poon model were determined using 2N2907 bipolar pnp transistor.

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Radiation-induced surface decomposition

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s0424820100075592 ◽

1983 ◽

Vol 41 ◽

pp. 368-369

Author(s):

M. L. Knotek

Keyword(s):

Ionizing Radiation ◽

Atomic Structure ◽

Chemical Bonding ◽

Neutral Species ◽

Radiation Induced ◽

Physical And Chemical ◽

Surface Decomposition ◽

The Relationship ◽

Electron And Photon ◽

Surface Bond

Modern surface analysis is based largely upon the use of ionizing radiation to probe the electronic and atomic structure of the surfaces physical and chemical makeup. In many of these studies the ionizing radiation used as the primary probe is found to induce changes in the structure and makeup of the surface, especially when electrons are employed. A number of techniques employ the phenomenon of radiation induced desorption as a means of probing the nature of the surface bond. These include Electron- and Photon-Stimulated Desorption (ESD and PSD) which measure desorbed ionic and neutral species as they leave the surface after the surface has been excited by some incident ionizing particle. There has recently been a great deal of activity in determining the relationship between the nature of chemical bonding and its susceptibility to radiation damage.

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