Chromate-reducing activity of Hansenula polymorpha recombinant cells over-producing flavocytochrome b2

Smutok, Oleh; Broda, Daniel; Smutok, Halyna; Dmytruk, Kostyantyn V.; Гончар, М. В.

doi:10.1016/j.chemosphere.2010.12.078

Cited by 14 publications

(12 citation statements)

References 28 publications

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“…Perceived Exertion has been defined as the subjective rating of the intensity of physical work load and has been the subject of increasing attention in the literature since the late 1950s (Borg,1962) . Ratings of perceived exertion have been reported to show linear correlations with HR and work intensity with correlation coefficients between 0.80 and 0.90 ( Borg,19 73; Borg,19 82;Skinner et. al., 1973).…”

Section: Introductionmentioning

confidence: 99%

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Intensity (Velocity) Volume (Distance) and Duration of Running Correlates Ratings of Perceived Exertion of Adult Male

Shaw¹

2012

IJPEFS

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The objectives of the study were to examine the relationship between: (1) intensity (velocity) of running and ratings of perceived exertion (2) volume (distance) of running and ratings of perceived exertion (3) duration of running and ratings of perceived exertion and (4) the product of load (intensity and volume) of running and ratings of perceived exertion. For the purpose of the study, tests were conducted on 45 randomly selected male sports persons age ranging from 20 to 30 years. Cooper's twelve minute run and walk test and Borg's ratings of perceived exertion scale were administered. In the twelve minute run and walk test, the subjects were asked to run/ walk for twelve minute on 100 meters straight (marked at an interval of each 10 meters) and cover the maximum possible distance. During the test at 200 meters (mts),

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Section: Introductionmentioning

confidence: 99%

“…al, 1979). The Borg Scale has been proven valid and reliable on repeated tests of increasing work intensity and product of loads either progressively or randomly ordered ( Borg,19 73).…”

Section: Introductionmentioning

confidence: 99%

Intensity (Velocity) Volume (Distance) and Duration of Running Correlates Ratings of Perceived Exertion of Adult Male

Shaw¹

2012

IJPEFS

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“…Electron mediators for Cr(VI) reduction belong to a diverse range of organic compounds of foreign origins and endogenous metabolism and can involve some heavy metals (Figure 3; Smutok et al, 2011;Xafenias et al, 2013;Huang et al, 2019;Cao et al, 2020). Often organic mediators are heterocyclic aromatic rings possessing conjugated bonds that enable reduction and rearrangement at biologically accessible reduction potentials (Chai et al, 2019).…”

Section: Electron Mediators (Or Electron Shuttles)mentioning

confidence: 99%

“…However, the crucial role of rGO in this association involved in reduction of Cr(III) into elemental Cr (a rare species) by lowering electronic potential or activation energy. Several dyes such as methylene blue, neutral dye, dichlorophenolindophenol (DCPIP), meldola blue, and Nile blue have also possessed electron transfer efficiency for Cr(VI) reduction in different fungal and bacterial cells (Smutok et al, 2011;Bai et al, 2018). Simultaneous removal of dyes along with Cr(VI) sets another reputation for their involvement in this reaction.…”

Section: Electron Mediators (Or Electron Shuttles)mentioning

confidence: 99%

Chemical-Assisted Microbially Mediated Chromium (Cr) (VI) Reduction Under the Influence of Various Electron Donors, Redox Mediators, and Other Additives: An Outlook on Enhanced Cr(VI) Removal

Rahman

Thomas

2021

Front. Microbiol.

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Chromium (Cr) (VI) is a well-known toxin to all types of biological organisms. Over the past few decades, many investigators have employed numerous bioprocesses to neutralize the toxic effects of Cr(VI). One of the main process for its treatment is bioreduction into Cr(III). Key to this process is the ability of microbial enzymes, which facilitate the transfer of electrons into the high valence state of the metal that acts as an electron acceptor. Many underlying previous efforts have stressed on the use of different external organic and inorganic substances as electron donors to promote Cr(VI) reduction process by different microorganisms. The use of various redox mediators enabled electron transport facility for extracellular Cr(VI) reduction and accelerated the reaction. Also, many chemicals have employed diverse roles to improve the Cr(VI) reduction process in different microorganisms. The application of aforementioned materials at the contaminated systems has offered a variety of influence on Cr(VI) bioremediation by altering microbial community structures and functions and redox environment. The collective insights suggest that the knowledge of appropriate implementation of suitable nutrients can strongly inspire the Cr(VI) reduction rate and efficiency. However, a comprehensive information on such substances and their roles and biochemical pathways in different microorganisms remains elusive. In this regard, our review sheds light on the contributions of various chemicals as electron donors, redox mediators, cofactors, etc., on microbial Cr(VI) reduction for enhanced treatment practices.

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“…Phenol is a toxic aromatic compound, but it is utilized as carbon source by the microbes [5]. Chromium is found in two oxidation states, i.e., Cr(III) and Cr(VI) [6], out of which Cr (VI) is most toxic, mutagenic and carcinogenic to the living organism [7,8]. The maximum permissible limit of Cr(VI) and phenol in drinking water according to the guidelines recommended by WHO is 0.05 and 0.002 mg/L, respectively [9].…”

Section: Introductionmentioning

confidence: 99%

Simultaneous bioremediation of Cr(VI) and phenol from single and binary solution using Bacillus sp.: Multicomponent kinetic modeling

Gupta

Balomajumder

2015

Journal of Environmental Chemical Engineering

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Chromate-reducing activity of Hansenula polymorpha recombinant cells over-producing flavocytochrome b2

Cited by 14 publications

References 28 publications

Intensity (Velocity) Volume (Distance) and Duration of Running Correlates Ratings of Perceived Exertion of Adult Male

Intensity (Velocity) Volume (Distance) and Duration of Running Correlates Ratings of Perceived Exertion of Adult Male

Chemical-Assisted Microbially Mediated Chromium (Cr) (VI) Reduction Under the Influence of Various Electron Donors, Redox Mediators, and Other Additives: An Outlook on Enhanced Cr(VI) Removal

Simultaneous bioremediation of Cr(VI) and phenol from single and binary solution using Bacillus sp.: Multicomponent kinetic modeling

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