Effect of temperature, radiation dose and composition on density, viscosity and volumetric properties of N,N,N′,N′-tetraoctyl diglycolamide (TODGA) and n-dodecane mixture, a promising system for the separation of actinides

2021 ◽  
Author(s):  
Jammu Ravi ◽  
Satyabrata Mishra ◽  
Remya Murali ◽  
N. Desigan ◽  
N. K. Pandey
Keyword(s):  
Radiation Dose ◽  
Effect Of Temperature ◽  
Volumetric Properties ◽  
Temperature Radiation

Studying the Effect of Temperature, Static Load and Nanodimensional Defects on the Mechanical Properties of Polyethylene Film at Uniaxial Extension

2020 ◽  
Vol 992 ◽  
pp. 325-330
Author(s):  
Anatoliy I. Kupchishin ◽  
Marat N. Niyazov ◽  
Buvkhan G. Taipova
Keyword(s):  
Mechanical Properties ◽  
Radiation Dose ◽  
Electron Irradiation ◽  
Modulus Of Elasticity ◽  
Static Load ◽  
Uniaxial Extension ◽  
Exponential Model ◽  
Effect Of Temperature ◽  
Static Loads ◽  
Different Temperatures

The dependence of strain on temperature in polyethylene under various static loads and exposure doses has been studied experimentally. After electron irradiation with doses of 10, 30, 50, 70, and 100 kGy, significant changes in the mechanical properties were observed, which are caused by the formation of nanodefects in the material’s structure. With increasing radiation dose, PE deformation at different temperatures decreases due to destruction in the structure of the polymer material. At the same time, the return deformation increases with increasing dose, indicating a change in the modulus of elasticity (E). The increase in E occurs due to the decrease in the distance between macromolecules in the irradiated structure of the sample. The obtained curves for both non-irradiated and irradiated material are described in an exponential model satisfactorily.

scholarly journals Study of Irradiation Temperature Effect on Change of Structural, Optical and Strength Properties of BeO Ceramics When Irradiated With Ar8+ and Xe22 Heavy Ions

2021 ◽  
Author(s):  
A.E. Ryskulov ◽  
M.V. Zdorovets ◽  
Artem Kozlovskiy ◽  
D.I. Shlimas ◽  
S.B. Kislitsin ◽  
...  
Keyword(s):  
Radiation Dose ◽  
Radiation Damage ◽  
Nuclear Power ◽  
Strength Properties ◽  
Irradiation Temperature ◽  
Operating Conditions ◽  
Optically Stimulated Luminescence ◽  
Power Losses ◽  
Temperature Radiation ◽  
Partial Annealing

Abstract This paper presents the results of the study of the effect of irradiation temperature on structural and optical distortions and deformations, as well as the strength properties of BeO ceramics as a result of irradiation with Ar8+ and Xe22+ ions at a radiation dose of 5х1013 cm-2. The choice of radiation dose is due to the effect of overlapping defective areas arising along the trajectories of ions in ceramics, which makes it possible to model radiation damage caused by the effect of accumulation as a result of cascade collisions and overlapping damaged areas. The temperature range of 300-1000 K was chosen to simulate different operating conditions, as well as the possibility of simulating partial annealing of defects during irradiation at high temperatures. During the research it was established that high-temperature radiation reduces influence of size of electronic and nuclear power losses of ions of Ar8+ and Xe22+ with energy of 70 MeV and 231 MeV, respectively, on extent of radiation damage of ceramics of BeO. Irradiation at a temperature of 1000 K results in an equal 14% change in dislocation density for these particles, a comparable decrease in the yield intensity of optically stimulated luminescence by 5% and 15%, as well as microhardness by 25% and 30%, respectively.

Poultry Meat Irradiation - Effect of Temperature on Chemical Changes and Inactivation of Microorganisms

1989 ◽  
Vol 52 (1) ◽  
pp. 26-29 ◽  
Author(s):  
T. HANIS ◽  
P. JELEN ◽  
P. KLÍR ◽  
J. MÑUKOVÁ ◽  
B. PÉREZ ◽  
...  
Keyword(s):  
Amino Acids ◽  
Pseudomonas Aeruginosa ◽  
Radiation Dose ◽  
Salmonella Typhimurium ◽  
Irradiation Temperature ◽  
Poultry Meat ◽  
Effect Of Temperature ◽  
Irradiation Effect ◽  
Characteristic Radiation ◽  
Peroxide Values

Chilled (10°C) and frozen (−15°C) broiler carcasses initially artificially contaminated either with Pseudomonas aeruginosa, Salmonella typhimurium or Serratia marcescens (106cfu/g) were irradiated (Co60) with doses of 0.5, 1.0, 2.5, 5.0 and 10.0 kGy. Ps. aeruginosa was eliminated by doses of 1.0 - 2.5 kGy, S. marcescens by doses of 2.5 - 5.0 kGy and S. typhimurium by a dose of 10 kGy. Characteristic radiation odor increasing with radiation dose and temperature was well removed by heat meat preparation. Radiation resulted in increase of acid and peroxide values and destruction of thiamine (up to 57%/10 kGy) and riboflavin (up to 27%/10 kGy), lower increase of fat indexes and lower destruction of vitamins was observed at lower irradiation temperature. Content of amino acids was not affected by the treatment.

THE EFFECTS OF RADIATION ON THE HABITAT TEMPERATURES OF THE LODGEPOLE NEEDLE MINER, RECURVARIA MILLERI BUSCK (GELECHIIDAE: LEPIDOPTERA)

1952 ◽  
Vol 30 (2) ◽  
pp. 144-153 ◽  
Author(s):  
W. R. Henson ◽  
R. F. Shepherd
Keyword(s):  
Solar Radiation ◽  
Ambient Air ◽  
Effect Of Temperature ◽  
The Sun ◽  
Heating Effect ◽  
Weather Factors ◽  
Radiation Level ◽  
Air Temperatures ◽  
Temperature Radiation ◽  
Effects Of Radiation

The lodgepole needle miner (Recurvaria, milleri Busck) passes the greater part of its life in the interior of needles of its host tree. Investigations of the temperature of needle mines and its relation to ambient air temperature, radiation, and a number of other weather factors are reported. Incoming solar radiation shows a heating effect on the needle mines which is directly proportional to the radiation level. The heating effect of the radiation is modified by other weather factors, by differences in the exposure of the needles, and by the type of mines in the needles. At night, needles are cooled below ambient air temperatures by outgoing radiation, which in turn is dependent on the nocturnal weather. The application of these results to studies of the effect of temperature on the needle miner can only be made with respect to individual needles. Thus, radiation of 1.5 gm-cal. per cm.2 per min. will elevate the temperature of a needle 6.3 Centigrade degrees in air moving at less than one mile per hour if the needle is orientated at right angles to the sun and fully exposed. Shade from other needles, wind over one mile per hour, and needle orientation other than 90° to the sun's rays all tend to reduce the amount of heating at the indicated level of radiation.

scholarly journals The effective volumes of waters of crystallization: non-ionic pharmaceutical systems

2019 ◽  
Vol 75 (5) ◽  
pp. 784-787 ◽  
Author(s):  
Leslie Glasser
Keyword(s):  
Thermodynamic Properties ◽  
Structural Data ◽  
Effect Of Temperature ◽  
Molecular Volume ◽  
Volumetric Properties ◽  
Effective Volume ◽  
Ambient Conditions ◽  
Ionic Systems ◽  
Hydrated Crystal ◽  
The Difference

The physical properties of organic solids are altered when hydrated (and, more generally, when solvated) and this is of particular significance for pharmaceuticals in application; for instance, the solubility of a hydrate is less than that of its parent. The effective volumes of waters of crystallization for non-ionic pharmaceuticals (where the `effective' volume is the difference per water molecule between the hydrate volume and the volume of the anhydrous parent) are here examined. This investigation contrasts with our earlier study of effective volumes of waters of crystallization for ionic materials where the coulombic forces are paramount. Volumetric properties are significant since they correlate strongly with many thermodynamic properties. Twenty-nine hydrate/parent systems have been identified, and their volumetric properties are reported and analysed (apart from aspartame and ephedrine for which the structural data are inconsistent). Among these systems, the data for paracetamol are extensive and it is possible to differentiate among the volumetric properties of its three polymorphs and to quantify the effect of temperature on their volumes. The effective volumes in both ionic and non-ionic systems are similar, with a median effective volume of 22.8 Å3 for the non-ionic systems compared with 24.2 Å3 for the ionic systems, and both are smaller than the molecular volume of 30 Å3 of ambient liquid water – which appears to be an upper limit to the effective volumes of waters of crystallization under ambient conditions. These results will be supportive in checking and confirmation of hydrated crystal structures and in assessing their thermodynamic properties.

Effect of temperature on W-shaped excess molar heat capacities and volumetric properties: Oxaalkane-nonane systems

1997 ◽  
Vol 18 (3) ◽  
pp. 761-777 ◽  
Author(s):  
C. A. Tovar ◽  
E. Carballo ◽  
C. A. Cerdeiriña ◽  
J. L. Legido ◽  
L. Romani
Keyword(s):  
Heat Capacities ◽  
Effect Of Temperature ◽  
Volumetric Properties ◽  
Excess Molar Heat Capacities
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