Workplace atmospheres. General requirements for the performance of procedures for the measurement of chemical agents

2015 ◽  
Keyword(s):  
Chemical Agents

Effect of Acetone and Kerosene on Skin Ultrastructure

1972 ◽  
Vol 30 ◽  
pp. 92-93
Author(s):  
A. P. Lupulescu ◽  
H. Pinkus ◽  
D. J. Birmingham
Keyword(s):  
Electron Microscopy ◽  
Human Skin ◽  
Osmium Tetroxide ◽  
Human Epidermis ◽  
Ultrastructural Changes ◽  
Chemical Agents ◽  
Skin Ultrastructure ◽  
Volar Surface

Our laboratory is engaged in the study of the effect of different chemical agents on human skin, using electron microscopy. Previous investigations revealed that topical use of a strong alkali (NaOH 1N) or acid (HCl 1N), induces ultrastructural changes in the upper layers of human epidermis. In the current experiments, acetone and kerosene, which are primarily lipid solvents, were topically used on the volar surface of the forearm of Caucasian and Negro volunteers. Skin specimens were bioptically removed after 90 min. exposure and 72. hours later, fixed in 3% buffered glutaraldehyde, postfixed in 1% phosphate osmium tetroxide, then flat embedded in Epon.

Durability of a Polypropylene Woven Geotextile under Climatic and Chemical Agents

2015 ◽  
Vol 1 (4) ◽  
pp. 172-177
Author(s):  
M. G. A. Guimarães ◽  
D. C. Urashima ◽  
Carlos Alberto Carvalho Castro ◽  
M. L. C. Lopes
Keyword(s):  
Chemical Agents

Single Cell Based Microelectrode Array Biosensors

2003 ◽  
Vol 773 ◽  
Author(s):  
Mo Yang ◽  
Shalini Prasad ◽  
Xuan Zhang ◽  
Mihrimah Ozkan ◽  
Cengiz S. Ozkan
Keyword(s):  
Electrical Activity ◽  
Single Cell ◽  
Cellular Response ◽  
Microelectrode Array ◽  
Fast Fourier Transformation ◽  
Chemical Agent ◽  
Extracellular Potential ◽  
Membrane Excitability ◽  
Specific Chemical ◽  
Chemical Agents

AbstractExtracellular potential is an important parameter which indicates the electrical activity of live cells. Membrane excitability in osteoblasts plays a key role in modulating the electrical activity in the presence of chemical agents. The complexity of cell signal makes interpretation of the cellular response to a chemical agent very difficult. By analyzing shifts in the signal power spectrum, it is possible to determine a frequency spectrum also known as Signature Pattern Vectors (SPV) specific to a chemical. It is also essential to characterize single cell sensitivity and response time for specific chemical agents for developing detect-to-warn biosensors. We used a 4x4 multiple Pt microelectrode array to spatially position single osteoblast cells, by using a gradient AC field. Fast Fourier Transformation (FFT) and Wavelet Transformation (WT) analyses were used to extract information pertaining to the frequency of firing from the extracellular potential.

POSSIBILITIES OF USING CHEMICAL AGENTS FOR THE PROTECTION OF Gerbera jamesonii AGAINST Phytophthora cryptogea

2018 ◽  
Vol 17 (5) ◽  
pp. 135-143
Author(s):  
Anna Chmielowiec-Korzeniowska ◽  
Magdalena Ptaszek ◽  
Piotr Baryła ◽  
Tomasz Lipa ◽  
Mirosław Korzeniowski
Keyword(s):  
Gerbera Jamesonii ◽  
Phytophthora Cryptogea ◽  
Chemical Agents

ORGANOPHOSPHORUS NEUROTOXINS

2020 ◽  
Author(s):  
Mariya Andriyanova ◽  
Aslanli Aslanli ◽  
Nataliya Basova ◽  
Viktor Bykov ◽  
Sergey Varfolomeev ◽  
...  
Keyword(s):  
Crop Protection ◽  
Chemical Warfare Agents ◽  
Agricultural Crop ◽  
Current State ◽  
Physicochemical Biology ◽  
Chemical Agents ◽  
Warfare Agents ◽  
History Of ◽  
Physicochemical Methods ◽  
State Of Research

The collective monograph is devoted to discussing the history of creation, studying the properties, neutralizing and using organophosphorus neurotoxins, which include chemical warfare agents, agricultural crop protection chemical agents (herbicides and insecticides) and medicines. The monograph summarizes the results of current scientific research and new prospects for the development of this field of knowledge in the 21st century, including the use of modern physicochemical methods for experimental study and theoretical analysis of biocatalysis and its mechanisms based on molecular modeling with supercomputer power. The book is intended for specialists who are interested in the current state of research in the field of organophosphorus neurotoxins. The monograph will be useful for students, graduate students, researchers specializing in the field of physical chemistry, physicochemical biology, chemical enzymology, toxicology, biochemistry, molecular biology and genetics, biotechnology, nanotechnology and biomedicine.

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