Physical and chemical properties. Kinetics of atmospheric chemical reactions involving aerosols

1960 ◽  
Vol 30 ◽  
pp. 155 ◽  
Author(s):  
R. D. Cadle ◽  
R. C. Robbins
Keyword(s):  
Chemical Reactions ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
Kinetics Of ◽  
And Chemical Properties

scholarly journals Radiation Safety for Incineration of Radioactive Waste Contaminated by Cesium

2017 ◽  
Author(s):  
Yu. Veriuzhsky ◽  
O. Hrynko ◽  
V. Tokarevsky
Keyword(s):  
Radioactive Waste ◽  
Chemical Reactions ◽  
Contaminated Soil ◽  
Radiation Safety ◽  
Chemical Properties ◽  
Damage Effect ◽  
Gas Purification ◽  
Physical And Chemical Properties ◽  
Physical And Chemical ◽  
And Chemical Properties

Problems in the treatment of radioactive waste contaminated by cesium nuclides are considered in the paper. Chornobyl experience in the management of contaminated soil and contaminated forests is analyzed in relation to the accident at Fukushima-1. The minimization of release of cesium aerosols into atmosphere is very important. Radiation influence of inhaling atmosphere aerosols polluted by cesium has damage effect for humans. The research focuses on the treatment of forests contaminated by big volumes of cesium. One of the most important technologies is a pyro-gasification incineration with chemical reactions of cesium paying attention to gas purification problems. Requirements for process, physical and chemical properties of treatment of radioactive waste based on the dry pyro-gasification incineration facilities are considered in the paper together with the discussion of details related to incineration facilities. General similarities and discrepancies in the environmental pollution caused by the accidents at Chornobyl NPP and Fukushima-1 NPP in Japan are analyzed.

The Kinetics and Occurrence of Optimum Vulcanization

1956 ◽  
Vol 29 (2) ◽  
pp. 555-567
Author(s):  
B. A. Dogadkin
Keyword(s):  
Molecular Weight ◽  
Tensile Strength ◽  
Structure Formation ◽  
Chemical Properties ◽  
Physical And Chemical Properties ◽  
Smooth Curves ◽  
Intermolecular Reaction ◽  
Physical And Chemical ◽  
Kinetics Of ◽  
And Chemical Properties

Abstract The fundamental reaction of vulcanization is the combination of a vulcanizing agent with rubber. The kinetics of this reaction is expressed by smooth curves. Simultaneously with the combining of the vulcanizing agent, in fact as a result of it, changes take place in a number of physical and chemical properties of rubber—solubility, modulus, tensile strength, and other indexes. Unlike the kinetics of combination of the vulcanizing agent, the changes in these properties are most often represented by curves having a maximum or minimum which characterizes the phenomenon of optimum vulcanization. The extreme form which curves of changes of physical and chemical properties of rubber assume during vulcanization can be explained, in our opinion, by the fact that, during vulcanization, there is a competition between opposing reactions, of which one set are reactions of structure formation (i.e., increase of the molecular weight and the intensity of intermolecular reaction), and the others are destruction reactions. Thus, during vulcanization under factory conditions, at least two reactions take place: (1) the reaction between rubber and sulfur, and (2) the reaction between rubber and molecular oxygen introduced into the vulcanization mix by milling with the ingredients. The amount of oxvgen present here in moles approaches the molar concentration of sulfur.

scholarly journals Modeling of pharmacokinetic processes of distribution of cisplatin in tumor tissues

2020 ◽  
pp. 106-108
Author(s):  
Д.А. Гиневский ◽  
П.В. Ижевский ◽  
И.Н. Шейно ◽  
Д.Г. Левитова
Keyword(s):  
In Silico ◽  
Chemical Properties ◽  
Malignant Neoplasms ◽  
Physical And Chemical Properties ◽  
Chemotherapeutic Drug ◽  
Tissue Organization ◽  
Tumor Tissues ◽  
Physical And Chemical ◽  
Kinetics Of ◽  
And Chemical Properties

Разработана математическая модель пространственно-временного распределения радиомодифицирующего агента химиотерапевтического препарата цисплатина с заданными физико-химическими свойствами на тканевом и клеточном уровнях организации биологической ткани. Эксперимент in silico позволил получить данные о кинетике внутриклеточного распределения цисплатина. Модель может быть адаптирована для определения 3D кинетики наночастиц, а также других препаратов для диагностики или терапии злокачественных новообразований. A mathematical model of the space-time distribution of a radiomodifying agent - a chemotherapeutic drug - cisplatin with specified physical and chemical properties at the tissue and cellular levels of the biological tissue organization has been developed. The in silico experiment provided data on the kinetics of the intracellular distribution of cisplatin. The model can be adapted to determine the 3D kinetics of nanoparticles, as well as other drugs for the diagnosis or therapy of malignant neoplasms.

Statistical criteria of stellar population types

1966 ◽  
Vol 24 ◽  
pp. 101-110
Author(s):  
W. Iwanowska
Keyword(s):  
Stellar Population ◽  
Chemical Properties ◽  
Spectrophotometric Study ◽  
Physical And Chemical Properties ◽  
Population Type ◽  
The Galaxy ◽  
Distribution Parameters ◽  
Physical And Chemical ◽  
Statistical Criteria ◽  
And Chemical Properties

In connection with the spectrophotometric study of population-type characteristics of various kinds of stars, a statistical analysis of kinematical and distribution parameters of the same stars is performed at the Toruń Observatory. This has a twofold purpose: first, to provide a practical guide in selecting stars for observing programmes, second, to contribute to the understanding of relations existing between the physical and chemical properties of stars and their kinematics and distribution in the Galaxy.

Response of corn (Zea mays L.) to various organic-based fertilizers in marginal upland of Sta. Rita, Samar

2017 ◽  
pp. 31-43
Author(s):  
Berta Ratilla ◽  
Loreme Cagande ◽  
Othello Capuno
Keyword(s):  
Block Design ◽  
Management Strategies ◽  
Chemical Properties ◽  
Organic Fertilizers ◽  
Growth And Yield ◽  
Physical And Chemical Properties ◽  
Total N ◽  
Randomized Complete Block Design ◽  
Physical And Chemical ◽  
And Chemical Properties

Organic farming is one of the management strategies that improve productivity of marginal uplands. The study aimed to: (1) evaluate effects of various organic-based fertilizers on the growth and yield of corn; (2) determine the appropriate combination for optimum yield; and (3) assess changes on the soil physical and chemical properties. Experiment was laid out in Randomized Complete Block Design, with 3 replications and 7 treatments, namely; T0=(0-0-0); T1=1t ha-1 Evans + 45-30-30kg N, P2O5, K2O ha-1; T2=t ha-1 Wellgrow + 45-30-30kg N, P2O5, K2O ha-1; T3=15t ha-1 chicken dung; T4=10t ha-1 chicken dung + 45-30-30kg N, P2O5, K2O ha-1; T5=15t ha-1 Vermicast; and T6=10t ha-1 Vermicast + 45-30-30kg N, P2O5, K2O ha-1. Application of organic-based fertilizers with or without inorganic fertilizers promoted growth of corn than the control. But due to high infestation of corn silk beetle(Monolepta bifasciata Horns), its grain yield was greatly affected. In the second cropping, except for Evans, any of these fertilizers applied alone or combined with 45-30-30kg N, P2O5, K2O ha-1 appeared appropriate in increasing corn earyield. Soil physical and chemical properties changed with addition of organic fertilizers. While bulk density decreased irrespective of treatments, pH, total N, available P and exchangeable K generally increased more with chicken dung application.

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