Results 21 to 30 of about 105,583 (339)

Influence of lead salts on some morphological and physiological parameters of filamentous cyanobacteria

open access: yesBiosystems Diversity, 2018
In the conditions of a model laboratory experiment the influence of lead salts (an acetate and nitrate) on morphological and physiological parameters of filamentous cyanobacteria was studied.
A. R. Galperina, O. B. Soprunova
doaj   +1 more source

Nanomaterials – Proposals of occupational exposure limits in the world and hygiene standards in Poland

open access: yesMedycyna Pracy, 2013
Currently, there are no legally binding workplace exposure limits for substances in the form of nanoobjects. There are different approaches to risk assessment and determination of occupational exposure limits.
Anna Maria Świdwińska-Gajewska   +1 more
doaj   +1 more source

Measuring the ambient air pollutants in Garmsar industrial district

open access: yesJournal of Air Pollution and Health, 2022
Introduction: Nowadays, air pollution is one of the main health and environmental problems in developing cities, which is a result of the increasing use of fossil fuels, heat generators and the activities of industrial districts and industries ...
Ramin Maleki, Seyyede Sara Azhdari
doaj   +1 more source

Organization of Hygienic Monitoring of Working Area Air Pollution by Particulates in Pharmaceutical Industries (Review)

open access: yesРазработка и регистрация лекарственных средств, 2022
Introduction. The use of highly active substances of various origins in the pharmaceutical industry exposes employees working directly with active pharmaceutical substances (APS) in manufacturing facilities to risks.
I. A. Pozharnov   +3 more
doaj   +1 more source

Safe design of cooled tubular reactors for exothermic multiple reactions: Multiple-reaction networks [PDF]

open access: yes, 1988
The model of the pseudo-homogeneous, one-dimensional cooled tubular reactor is applied to a multiple-reaction network. It is demonstrated for a network which consists of two parallel and two consecutive reactions.
Westerink, E.J., Westerterp, K.R.
core   +2 more sources

Review of toxicity for the main chemical elements - pollutants of salmonid spawning rivers in Kamchatka

open access: yesИзвестия ТИНРО, 2015
Toxicological tests of salmons on acute and chronic critical concentrations of 15 chemical elements (Cu, Zn, Pb, Co, Ni, Mn, Sb, Al, Fe, Mo, V, Se, S, As, B) are executed and compared with cited data, with special attention to mechanisms of the toxins ...
Eugeny V. Esin
doaj   +1 more source

Optimization of leaf morphology in relation to leaf water status: A theory. [PDF]

open access: yes, 2020
The leaf economic traits such as leaf area, maximum carbon assimilation rate, and venation are all correlated and related to water availability. Furthermore, leaves are often broad and large in humid areas and narrower in arid/semiarid and hot and cold ...
Ding, Junyan   +2 more
core   +2 more sources

Analysis of Trace Metal Contamination in Pahang River and Kelantan River, Malaysia [PDF]

open access: yesMATEC Web of Conferences, 2019
The primary objective of this study is to determine trace metal contamination in environmental samples obtained from Pahang River and Kelantan River, Malaysia which may help to identify the risk of sustainable dredging in these areas.
Manap Norpadzlihatun   +3 more
doaj   +1 more source

A Review on water and sedimentary Lead concentrations in Kenya’s surface water bodies [PDF]

open access: yesPresent Environment and Sustainable Development, 2022
Proper management, monitory and pollution controls measure should be maintained, for limited water resources, so as to reduce human health risks. Lead pollution can negatively affect human health.
Cornelius NGANDU
doaj   +1 more source

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