Effect of various environmental conditions on the swelling property of PAAm/PAAcK superabsorbent hydrogel prepared by ionizing radiation

2006 ◽  
Vol 101 (6) ◽  
pp. 3955-3962 ◽  
Author(s):  
H. A. Abd El-Rehim ◽  
El-Sayed A. Hegazy ◽  
H. L. Abd El-Mohdy
Keyword(s):  
Ionizing Radiation ◽  
Environmental Conditions ◽  
Superabsorbent Hydrogel ◽  
Swelling Property

Parameter Correlation in Models of Hyperthermic Cell Death

2011 ◽  
Author(s):  
Neil T. Wright
Keyword(s):  
Cell Death ◽  
Ionizing Radiation ◽  
Mathematical Models ◽  
Environmental Conditions ◽  
First Principle ◽  
Multiple Targets ◽  
Cellular Targets ◽  
Parameter Correlation ◽  
Temperature Ranges ◽  
Definition Of

A number of mathematical models have been developed to predict the survival of cells after heating. Some of these models have been based on first principle arguments, while others have been empirically motivated. Some models have been inspired by analogs of damage to cells by ionizing radiation. Evidence exists for multiple targets leading to cell death, although precise definition of the pathways for the various temperature ranges and environmental conditions remains in question. For reviews of the cellular targets of heating, see [1], [2], or [3].

scholarly journals Public safety conditions under radiological emergencies monitoring comprehensive system mobile facilities application

2021 ◽  
Vol 843 (1) ◽  
pp. 012049
Author(s):  
S I Voronov ◽  
E V Popov ◽  
V A Sednev ◽  
O S Voronov
Keyword(s):  
Ionizing Radiation ◽  
Monitoring System ◽  
Emergency Response ◽  
Environmental Conditions ◽  
Comprehensive System ◽  
Successful Implementation ◽  
The Public ◽  
Radiation Sources ◽  
Control Loss ◽  
Mobile Facilities

Abstract The article presents examples of radiological emergencies with ionizing radiation sources used in radioisotope devices. A number of measures aimed at emergency response in relation to such emergencies, including in relation to the control of the radiation situation (CRS) and its assessment, are considered. A variant of building a complex of mobile CRS tools for a comprehensive monitoring system for the state of the population protection is presented. Special attention is paid to the justification and optimization of the CRS use in situations of control loss over IRS, including technical, organizational and scientific approaches to the use of these mobile tools. In order to optimize the group integrated use of mobile CRS tools, typical radiological situations are studied in advance and rational options for the mobile CRS tools using are selected, taking into account different environmental conditions, including natural-geographical, climatic and man-made factors. The considered approaches to optimization in the use of mobile means of comprehensive systems of the public protection conditions monitoring in radiological emergencies allow, first of all, to increase the efficiency of their use and ensure the successful implementation of tasks for the prevention and elimination of such emergencies consequences.

Some effects of ionizing radiations on the alkaline phosphatase in cow's milk

1962 ◽  
Vol 29 (1) ◽  
pp. 1-10 ◽  
Author(s):  
G. Glew
Keyword(s):  
Heat Treatment ◽  
Alkaline Phosphatase ◽  
Ionizing Radiation ◽  
Dose Rate ◽  
Phosphatase Activity ◽  
Alkaline Phosphatase Activity ◽  
Environmental Conditions ◽  
Active Sites ◽  
Heat Inactivation ◽  
Ionizing Radiations

SummaryThe effects of ionizing radiation on the alkaline phosphatase activity of milk have been studied under different environmental conditions. Twenty-five megarads were required to inactivate the enzyme completely. A combination of heat treatment and irradiation given either before or after heating showed that inactivation of the enzyme was greater when heating occurred after irradiation, this effect of the different forms of energy possibly indicating different mechanisms of heat inactivation. Varying the dose rate over the range 12–250 krad/min did not affect the amount of enzyme inactivated. After irradiation, activity declined during storage at 30°C but not at 5°C. Irradiation did not change the value of Km yet the Vmax fell, indicating that there are fewer active sites present after irradiation but that affinity of the remaining sites for the substrate remains unchanged.

Radiation-induced surface decomposition

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.

Vibration Isolator System for Electron Microscope

1990 ◽  
Vol 48 (1) ◽  
pp. 182-183
Author(s):  
K. Ohi ◽  
M. Mizuno ◽  
T. Kasai ◽  
Y. Ohkura ◽  
K. Mizuno ◽  
...  
Keyword(s):  
Electron Microscope ◽  
Magnetic Fields ◽  
Environmental Conditions ◽  
Vibration Isolator ◽  
Air Conditioners ◽  
Vibration Isolators ◽  
Large Size ◽  
Electron Microscopes

In recent years, with electron microscopes coming into wider use, their installation environments do not necessarily give their performance full play. Their environmental conditions include air-conditioners, magnetic fields, and vibrations. We report a jointly developed entirely new vibration isolator which is effective against the vibrations transmitted from the floor.Conventionally, large-sized vibration isolators which need the digging of a pit have been used. These vibration isolators, however, are large present problems of installation and maintenance because of their large-size.Thus, we intended to make a vibration isolator which1) eliminates the need for changing the installation room2) eliminates the need of maintenance and3) are compact in size and easily installable.

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