Results 11 to 20 of about 447,343 (334)

Quaternary ammonium compounds – New occupational hazards

open access: yesMedycyna Pracy, 2014
Quaternary ammonium compounds (QACs, quats) belong to organic ionic chemical agents which display unique properties of both surfactants and disinfectants.
Agnieszka Lipińska-Ojrzanowska   +1 more
doaj   +3 more sources

Hygroscopicity of organic compounds from biomass burning and their influence on the water uptake of mixed organic ammonium sulfate aerosols [PDF]

open access: yesAtmospheric Chemistry and Physics, 2014
Hygroscopic behavior of organic compounds, including levoglucosan, 4-hydroxybenzoic acid, and humic acid, as well as their effects on the hygroscopic properties of ammonium sulfate (AS) in internally mixed particles are studied by a hygroscopicity tandem
T. Lei   +4 more
doaj   +1 more source

Changes of inorganic nitrogen compounds concentration in a mining enterprise wastewater by the microalgae Chlorella vulgaris

open access: yesVestnik MGTU, 2023
Wastewater contamination by nitrogen compounds is a serious problem for the mining, industrial and utility companies. Nitrogen can enter quarry effluent when explosives containing ammonium nitrate are used in blasting operations.
Shcheglov G. A.
doaj   +1 more source

Ammonium toxicity and potassium limitation in yeast. [PDF]

open access: yesPLoS Biology, 2006
DNA microarray analysis of gene expression in steady-state chemostat cultures limited for potassium revealed a surprising connection between potassium and ammonium: potassium limits growth only when ammonium is the nitrogen source.
David C Hess   +3 more
doaj   +1 more source

Diquaternary Ammonium Compounds in Zeolite Synthesis: Cyclic and Polycyclic N-Heterocycles Connected by Methylene Chains [PDF]

open access: yes, 2009
An additional dimension has been added to our long-standing studies in high silica zeolite synthesis via a guest/host synergism. We have created and studied the impact of making symmetric diquaternary ammonium compounds, by varying the chain length ...
Burton, Allen W.   +3 more
core   +1 more source

Groundwater chemistry, pollution, and health risk assessment for nitrogen compounds. A case study in a suburban region of Romania

open access: yesRomanian Journal of Ecology & Environmental Chemistry, 2022
As groundwater is used as a source of drinking water, monitoring its quality is essential due to possible adverse effects on human health. Nitrogen compounds (nitrates, nitrites, ammonia) within certain concentration limits are natural components of the ...
Nicoleta Vasilache   +8 more
doaj   +1 more source

Complexing additives to reduce the immiscible phase formed in the hybrid ZnBr2 flow battery [PDF]

open access: yes, 2017
The zinc-bromine redox flow battery (RFB) is one of a very few commercially viable RFB energy storage system capable of integration with intermittent renewable energy sources to deliver improved energy management.
Berlouis, L.   +4 more
core   +1 more source

Synthesis of Novel Quaternary Ammonium Salts and Their in Vitro Antileishmanial Activity and U-937 Cell Cytotoxicity

open access: yesMolecules, 2016
This work describes the synthesis of a series of quaternary ammonium salts and the assessment of their in vitro antileishmanial activity and cytotoxicity.
Sandra M. Duque-Benítez   +6 more
doaj   +1 more source

Modeling the gas-particle partitioning of secondary organic aerosol: the importance of liquid-liquid phase separation [PDF]

open access: yes, 2012
The partitioning of semivolatile organic compounds between the gas phase and aerosol particles is an important source of secondary organic aerosol (SOA).
Seinfeld, J. H., Zuend, A.
core   +3 more sources

Cloud condensation nuclei activity, closure, and droplet growth kinetics of Houston aerosol during the Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS) [PDF]

open access: yes, 2009
In situ cloud condensation nuclei (CCN) measurements were obtained in the boundary layer over Houston, Texas, during the 2006 Gulf of Mexico Atmospheric Composition and Climate Study (GoMACCS) campaign onboard the CIRPAS Twin Otter.
Dubey, Manvendra K.   +12 more
core   +2 more sources

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