The determination of radon volumetric activity in atmospheric air and in soil of samarkand and navoi regions

2021 ◽  
Vol 11 (2) ◽  
pp. 880-884
Author(s):  
A. M. Muzaffarov ◽  
R. M. Eshburiev ◽  
A. R. Jurakulov ◽  
D. M. Kholov ◽  
K.H Hoshimov ◽  
...  
Keyword(s):  
Volumetric Activity ◽  
Atmospheric Air

scholarly journals Air pollution in landfill of wastes other than hazardous or inert / Zanieczyszczenia powietrza na składowiskach odpadów innych niż niebezpieczne i obojętne

2015 ◽  
Vol 41 (2) ◽  
pp. 41-46 ◽  
Author(s):  
Ewa Miaśkiewicz-Pęska ◽  
Mirosław Szyłak-Szydłowski
Keyword(s):  
Air Pollution ◽  
Chemical Analysis ◽  
Microscopic Fungi ◽  
Gas Chromatograph ◽  
Psychrophilic Bacteria ◽  
Air Samples ◽  
Atmospheric Air ◽  
Bacteria And Fungi ◽  
Portable Gas Chromatograph

Abstract Microbiological and chemical analysis of air was carried out on the area of landfill of wastes other than inert or hazardous. The landfill covers 20 ha and 40 000 Mg of wastes is deposited annually. Municipal waste is not segregated at the landfill. The research was conducted in April, May and November 2012. Number of the psychrophilic and mesophilic bacteria and fungi was estimated by a culture-based method. Quantitative determination of sulfur compounds and meteorological and olfactrometric examinations were also carried out. Chemical analysis was conducted with a Photovac Voyager portable gas chromatograph. Air samples were collected at 5 points. The largest group of microbes were psychrophilic bacteria, especially in summer. The highest concentration of hydrogen sulfide and other odorants was found at leachate tank and landfill body. According to the Polish Standard for the assessment of atmospheric air pollution the air in the area of the landfill is classified as not contaminated and sporadically moderately contaminated. In spring and summer the number of microscopic fungi was increased also in control samples.

Influence of phthalocyanine pigments on the properties of flame-retardant elastomeric composites based on styrene-butadiene or acrylonitrile-butadiene rubbers

e-Polymers ◽  
2016 ◽  
Vol 16 (4) ◽  
pp. 287-294
Author(s):  
Szymon Żaczek ◽  
Agnieszka Pająk ◽  
Rafał Anyszka ◽  
Grażyna Janowska
Keyword(s):  
Mechanical Properties ◽  
Flame Retardants ◽  
Oxygen Index ◽  
Cross Linking ◽  
Dicumyl Peroxide ◽  
Green Color ◽  
Atmospheric Air ◽  
Styrene Butadiene ◽  
Elastomeric Composites

AbstractA study about the influence of the impartment of phthalocyanine pigments into elastomeric composites was conducted. Acrylonitrile-butadiene (NBR) and styrene-butadiene (SBR) rubbers crosslinked by either sulfur or dicumyl peroxide were filled with non-toxic flame retardants (Mg(OH)2 or Al(OH)3) and thermally stable pigments (zinc or chloroaluminum phthalocyanines). Determination of cross-linking degree, mechanical properties, aging coefficient, thermal analysis (TG, DTG, DTA) and flammability tests (oxygen index, combustion in air) were carried out. The addition of the pigments, apart from the impartment of blue or blue-green color to elastomeric composites, in numerous cases improved their mechanical properties, thermal stability, limited flammability and allowed obtaining self-extinguishing materials in atmospheric air.

Gas-chromatographic determination of trace sarin and soman in atmospheric air of work zones and inhabited areas

2007 ◽  
Vol 62 (2) ◽  
pp. 141-146 ◽  
Author(s):  
I. N. Stan’kov ◽  
S. N. Mylova ◽  
A. A. Sergeeva ◽  
V. B. Sitnikov ◽  
O. T. Morozova ◽  
...  
Keyword(s):  
Chromatographic Determination ◽  
Work Zones ◽  
Atmospheric Air

Specific features of the determination of carbonyl compounds in atmospheric air

2016 ◽  
Vol 71 (4) ◽  
pp. 426-430 ◽  
Author(s):  
R. M. Khatmullina ◽  
V. I. Safarova ◽  
S. A. Bekreneva ◽  
I. M. Kitaeva ◽  
F. Kh. Kudasheva
Keyword(s):  
Carbonyl Compounds ◽  
Atmospheric Air

scholarly journals On the temperature of steam, and its corresponding presure

1851 ◽  
Vol 5 ◽  
pp. 960-960
Keyword(s):  
Great Britain ◽  
Atmospheric Air ◽  
Temperature And Pressure ◽  
The Law

In this paper, which is a continuation of a former paper bearing the same title, the author states that the law given in that paper, in reference to steam when superincumbent on the water in the boiler, may be rendered applicable to the determination of its pressure when insulated therefrom, as in the case of the expansive engine, of which the cylinder being in part filled with steam of the same temperature as that in the boiler, the communication is suddenly cut off, and the stroke is completed by the pressure on the piston of the steam whilst expanding within the cylinder. He considers that the power of expansive engines has been greatly overrated, instancing those of the Great Britain, which were of the estimated power of 1200 horses, but which he states he can prove did not exceed in actual power that of 300 horses. This he attributes to the inapplicability of Mariotte’s law without a particular limitation. Having premised that “it is assumed that, by nature’s law in the generation of steam, of the temperature 100° and of a pressure of 15 lbs. on a square inch, the density of the Matter of Heat, is to that of atmospheric air of the same temperature and pressure exactly as 1 to 2,” he then gives general laws, by means of which, he considers, the pressure of steam when cut oft from its generating source may be correctly estimated.

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