Examples of 'alpha-hch' in a sentence
Meaning of "alpha-hch"
Alpha-HCH is a noun referring to a chemical compound that is a persistent organic pollutant and is a type of organochlorine pesticide
How to use "alpha-hch" in a sentence
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alpha-hch
No specific studies are available on the effects of alpha-HCH on humans.
Under aerobic conditions alpha-HCH was dehydrochlorinated to pentachlorocyclohexane in soil slurries.
For these reasons global action on alpha-HCH is warranted.
If nonracemic alpha-HCH residues in the environment or biota are measured, enzymes are involved.
Studies on developmental, teratogenic and reproductive effects of alpha-HCH are missing.
There are several pathways of alpha-HCH for entering the environment.
Neurological effects have not been seen in animals treated with alpha-HCH.
The anaerobic metabolic pathway of alpha-HCH leads via dechlorination to tetrachlorocyclohexene.
Thus it is expected that photolysis plays a minor role in the removal of alpha-HCH.
The anaerobic metabolic pathway of alpha-HCH leads via dechlorination to tetrachlorocyclohexane.
This indicates an enantiospecific biotransformation and accumulation of alpha-HCH in the food chain.
The specific enrichment of alpha-HCH in the mammalian brain might be a reason of concern.
There are interspecies differences in the enantiomeric profile of alpha-HCH in marine mammals, too.
However, alpha-HCH is now being found at higher levels than before in ringed seal blubber.
Several studies have also reported photolytic isomerization of gamma-HCH to alpha-HCH.
See also
Several epidemiological studies indicate that alpha-HCH might play a role in human breast cancer.
Human exposure to alpha-HCH results mostly from ingestion of contaminated plants, animals and animal products.
Selected monitoring data of abiotic compartments and vegetation values refer to alpha-HCH except otherwise stated.
Alpha-HCH is acutely toxic to aquatic organisms.
Available information suggests that the food chain bioaccumulation of alpha-HCH is higher than for lindane.
Alpha-HCH is a known tumour promoting agent.
USEPA categorized alpha-HCH as probable human carcinogen.
Alpha-HCH is the most frequent isomer found in environmental compartments.
No enantioselective biotransformation in rainbow trout for alpha-HCH was observed by Konwick et al.
Alpha-HCH by itself is neither intentionally produced nor placed on the market.
Beta-HCH has a much lower vapor pressure and a much higher melting point than the alpha-HCH.
In other words, alpha-HCH effectively accumulates in the Arctic ecosystem as a whole.
But this is not applicable for alpha-HCH.
Alpha-HCH accumulates to a higher extent in human placenta than in breast milk.
Structure of the alpha-HCH enantiomers.
Alpha-HCH is expected to rapidly degrade in tropical conditions, whereas it accumulated in colder climates.
Replacement of alpha-HCH.
Alpha-HCH is a constituent of technical HCH, which is regulated by at least two international agreements.
It was suggested that alpha-HCH follows the same pathway than gamma-HCH.
Alpha-HCH has been found in cow 's milk in countries where HCH had been used recently.
However compared to the gamma - and alpha-HCH it is the most recalcitrant isomer.
Alpha-HCH may undergo enantioselective degradation which depends on the site and medium.
Some animals, especially birds, but also mammals, have the potential to metabolize alpha-HCH.
Alpha-HCH may adversely affect human health in contaminated areas as well as in Arctic regions.
Carcinogenicity, Studies of the carcinogenicity of alpha-HCH are limited.
Alpha-HCH also tends to associate with soils and sediments because of its low polarity.
For these reasons global action on alpha-HCH is warranted . 1 INTRODUCTION.
Alpha-HCH exposure levels in local areas have declined after worldwide prohibitions and restrictions.
Austria ( on behalf of Germany ) prepared the first working draft on alpha-HCH.
Historically, alpha-HCH was released during the manufacture of technical HCH and its use as a pesticide.
Compared to technical HCH and lindane, limited data are available for alpha-HCH.
Alpha-HCH is moderately persistent in soil.
A wide range of bioaccumulation factors ( BAF ) for alpha-HCH has been reported in several studies.
Alpha-HCH may bioaccumulate and biomagnify in biota and Arctic food webs.
However, some authors have reported a photodegradation half-life of 91 hours for thin films of alpha-HCH.
