scholarly journals State and prospects of hygienic regulation of the production environment with a reduced oxygen content (literature review)

2021 ◽  
Vol 100 (6) ◽  
pp. 594-597
Author(s):  
Igor V. Bukhtiyarov ◽  
Nikolay V. Shestopalov ◽  
Denis V. Vinnikov ◽  
Dmitry V. Glukhov ◽  
Elena S. Pochtareva ◽  
...  
Keyword(s):  
Oxygen Concentration ◽  
Working Conditions ◽  
Work Conditions ◽  
Living Environment ◽  
Cochrane Library ◽  
Production Environment ◽  
Low Oxygen ◽  
Confined Spaces ◽  
Gas Environment ◽  
Low Oxygen Concentration

The work is devoted to the physiological and hygienic foundations of the safety of activities in the conditions of the changed gas environment and characteristics of the main medical measures for the employees’ protection in a hypoxic environment, the analysis of domestic and foreign data, the study of working conditions in the environment with the reduced oxygen concentration in the air. Investigations were carried out on premises with various technological processes, a changing environment, and a reduced oxygen concentration when employees perform multiple operations. The health status of workers was assessed depending on the time spent in the changed gas environment and the percentage of oxygen. Having analyzed the regulatory documents currently existing in the Russian Federation on the assessment and control of production factors, working conditions in confined spaces with a low oxygen concentration in the air, air environment to maintain health, high performance, and prevent diseases, experts concluded that it is necessary to develop Sanitary Rules and Norms, SanPiN “Sanitary and Epidemiological Requirements for Habitability (Stay) in Confined Spaces with a Low Oxygen Concentration in the Air” because currently there is no document existing specifically on this issue. The literature was searched in the databases Scopus, Web of Science, MedLine, The Cochrane Library, EMBASE, Global Health, CyberLeninka, RSCI. There were prepared draft sanitary plans and standards “Sanitary and epidemiological requirements for the environment with a reduced concentration of oxygen in the air,” which establish sanitary and epidemiological requirements for the environment with a reduced concentration of oxygen in the air, as well as for the organization of control, methods measurements of air components at workplaces and measures to prevent harmful effects on the health of workers. They apply to work conditions in the living environment for all premises with a reduced oxygen concentration in the air.

Effect of low oxygen concentration on activation of inflammation by Helicobacter pylori

2021 ◽  
Vol 560 ◽  
pp. 179-185
Author(s):  
Adiza Abass ◽  
Tokuju Okano ◽  
Kotchakorn Boonyaleka ◽  
Ryo Kinoshita-Daitoku ◽  
Shoji Yamaoka ◽  
...  
Keyword(s):  
Helicobacter Pylori ◽  
Oxygen Concentration ◽  
Low Oxygen ◽  
Low Oxygen Concentration

The Constant Low Oxygen Concentration in All the Target Cells for Mouse Tail Radionecrosis

1982 ◽  
Vol 92 (1) ◽  
pp. 172 ◽  
Author(s):  
J. H. Hendry ◽  
J. V. Moore ◽  
B. W. Hodgson ◽  
J. P. Keene
Keyword(s):  
Oxygen Concentration ◽  
Target Cells ◽  
Low Oxygen ◽  
Low Oxygen Concentration

scholarly journals Zooplankton fluctuations in Jurumirim Reservoir (São Paulo, Brazil): a three-year study

2009 ◽  
Vol 69 (1) ◽  
pp. 1-18 ◽  
Author(s):  
LP. Sartori ◽  
MG. Nogueira ◽  
R. Henry ◽  
EM. Moretto
Keyword(s):  
Water Column ◽  
Oxygen Concentration ◽  
Retention Time ◽  
Sao Paulo ◽  
Seasonal Effect ◽  
São Paulo ◽  
Low Oxygen ◽  
High Concentration ◽  
Heterogeneous Distribution ◽  
Low Oxygen Concentration

During three consecutive years, monthly samples of zooplankton were taken in the lacustrine (dam) zone of Jurumirim (São Paulo, Brazil). The seasonal effect on basic limnological features (thermal regime, oxygen distribution, phytoplankton biomass, etc.) was also examined. The influence of the seasonality on the fluctuation of the zooplankton composition and abundance was not clearly detected (low degree of recurrent patterns). Rotifers (32 taxa) were the most abundant organisms during almost the entire study period with some seasonal alternations in the maximum abundance peaks of the main taxa (Conochilus unicornis, Keratella americana, K. cochlearis and Hexarthra spp.), except for Polyarthra (mainly P. vulgaris). Only occasionally copepods were numerically dominant. Higher copepod abundance was positively associated to periods of increase in the water retention time. Among the Copepoda (10 taxa) the calanoids (mainly Notodiaptomus iheringi) were more abundant, especially in warmer periods. Conversely, cyclopoids had higher abundance in autumn and winter. The species Thermocyclops minutus and T. decipiens co-occurred, but the first attained higher abundance. Some evidence of co-existence strategies between both species are considered. Cladocera (17 taxa) was never numerically dominant and the main taxa (Bosmina spp., Ceriodaphnia spp. and Diaphanosoma spp.) occurred almost the whole study period and did not present a seasonal pattern of fluctuation. Diaphanosoma (mainly D. birgei) attained the highest abundance among cladocerans. Most organisms were always found at the surface, but they also occupy the whole water column, even in periods of stratified conditions and low oxygen concentration in the bottom layers. Among the main zooplanktonic taxa, only Hexarthra avoids deep layers. An exceptionally high concentration of Copepoda nauplii on the surface was influenced by low transparency, high concentration of phytoplankton at this layer and low oxygen concentration at the bottom. In periods of higher retention timevariability there was a more heterogeneous distribution of the zooplankton in the water column. The increase in the retention time seems also to favor the copepod development. Finally, some inter-decade changes are considered on the basis of zooplankton assemblage structure observations.

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