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501283 occurrences (No.27 in the rank) during 5 years in the PubMed. [no cache]
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393) The soil samples from dumpsite and surrounding areas were found to be highly contaminated with HCH residue levels as high as 1.8 × 10(5) mg kg(-1).
* Bacterial diversity and real-time PCR based assessment of linA and linB gene distribution at hexachlorocyclohexane contaminated sites.
- The disposal of hexachlorocyclohexane (HCH) muck has created large number of HCH dumpsites all over the world from where the harmful HCH isomers are leaking into the environment. Bacteria have evolved at such contaminated sites that have the ability to degrade HCH. Degradation of various HCH isomers in bacterial strains is mediated primarily by two genes: linA and linB which encode dehydrochlorinase and haloalkane dehalogenase respectively. In this study we explored one such highly contaminated HCH dumpsite located in Lucknow, Uttar Pradesh, India. To assess the biostimulation potential of the contaminated site, microbial diversity study and real-time PCR based quantification of lin genes was carried out. The soil samples from dumpsite and surrounding areas were found to be highly contaminated with HCH residue levels as high as 1.8 × 10(5) mg kg(-1). The residues were detected in areas upto 13 km from the dumpsite. Sphingomonads, Chromohalobacter, and Marinobacter were the dominant genera present at the dump-site. Role of Sphingomonads in HCH degradation has been well documented. The highest copy numbers of linA and linB genes as determined using real-time PCR were 6.2 × 10(4) and 5.3 × 10(5), respectively, were found in sample from the dump site. The presence of Sphingomonads, linA, and linB genes from HCH contaminated soil indicates the presence of indigenous bacterial communities capable of HCH degradation.
Overview of noun level
The noun level has 8 senses (first 6 from tagged texts)
1. (69) degree, grade, level -- (a position on a scale of intensity or amount or quality; "a
moderate grade of intelligence"; "a high level of care is required"; "it is all a matter of degree")
2. (22) grade, level, tier -- (a relative position or degree of value in a graded group; "lumber of
the highest grade")
3. (15) degree, level, stage, point -- (a specific identifiable position in a continuum or series or
especially in a process; "a remarkable degree of frankness"; "at what stage are the social
sciences?")
4. (5) level -- (height above ground; "the water reached ankle level"; "the pictures were at the
same level")
5. (1) level, spirit level -- (indicator that establishes the horizontal when a bubble is centered
in a tube of liquid)
6. (1) horizontal surface, level -- (a flat surface at right angles to a plumb line; "park the car
on the level")
7. level, layer, stratum -- (an abstract place usually conceived as having depth; "a good actor
communicates on several levels"; "a simile has at least two layers of meaning"; "the mind functions
on many strata simultaneously")
8. floor, level, storey, story -- (a structure consisting of a room or set of rooms at a single
position along a vertical scale; "what level is the office on?")
Overview of verb level
The verb level has 6 senses (first 3 from tagged texts)
1. (4) level -- (aim at; "level criticism or charges at somebody")
2. (1) level, raze, rase, dismantle, tear down, take down, pull down -- (tear down so as to make
flat with the ground; "The building was levelled")
3. (1) flush, level, even out, even -- (make level or straight; "level the ground")
4. charge, level, point -- (direct into a position for use; "point a gun"; "He charged his weapon at
me")
5. level -- (talk frankly with; lay it on the line; "I have to level with you")
6. level, level off -- (become level or even; "The ground levelled off")
--- WordNet end ---