Results 61 to 70 of about 324,023 (154)

Biological activity of humic substances in the liver of Mongolian gerbils (Meriones unguiculatus)

open access: yesVìsnik Dnìpropetrovsʹkogo Unìversitetu: Serìâ Bìologìâ, Ekologìâ, 2016
One important reason for non-use of medicinal drugs is their hepatotoxicity. The search for new natural biologically active substances with hepatoprotective properties and which are cost-effective is an important task today.
D. Serova, O. Taran, O. Dyomshina
doaj   +1 more source

Novel Cucumis enzymes associated with host-specific disease resistance to Phytophthora melonis Katsura

open access: yesBiotechnology & Biotechnological Equipment, 2020
The hemibiotrophic oomycetes are significant threats to a wide range of Cucurbitaceae species, causing substantial losses of plant productions. Particularly, Phytophthora melonis Katsura evokes severe symptoms, thus dramatically limiting the yield in ...
Mehdi Nasr-Esfahani   +4 more
doaj   +1 more source

A model of autophagy size selectivity by receptor clustering on peroxisomes [PDF]

open access: yesarXiv, 2016
Selective autophagy must not only select the correct type of organelle, but also must discriminate between individual organelles of the same kind so that some but not all of the organelles are removed. We propose that physical clustering of autophagy receptor proteins on the organelle surface can provide an appropriate all-or-none signal for organelle ...
arxiv  

Inhibition of TXNRD or SOD1 overcomes NRF2-mediated resistance to β-lapachone [PDF]

open access: yes, 2020
Alterations in the NRF2/KEAP1 pathway result in the constitutive activation of NRF2, leading to the aberrant induction of antioxidant and detoxification enzymes, including NQO1.
Boothman, David A.   +6 more
core   +1 more source

Physiological and antioxidant responses of cape gooseberry (Physalis peruviana L.) seedlings to phosphorus deficiency

open access: yesAgronomía Colombiana, 2019
The main objective of present study was to understand the physiological effects of phosphorus (P) deficiency and the antioxidant response in cape gooseberry (Physalis peruviana L.) seedlings. Seedlings were grown in soil with five P levels: 0 (P0), 6 (P6)
Gabriel Roveda-Hoyos, Liz Moreno-Fonseca
doaj   +1 more source

Requirement of a Plasmid-Encoded Catalase for Survival of \u3cem\u3eRhizobium etli\u3c/em\u3e CFN42 in a Polyphenol-Rich Environment [PDF]

open access: yes, 2008
Nitrogen-fixing bacteria collectively called rhizobia are adapted to live in polyphenol-rich environments. The mechanisms that allow these bacteria to overcome toxic concentrations of plant polyphenols have not been clearly elucidated.
Brom, Susana   +5 more
core   +1 more source

A study of the antioxidants in Oxytropis pilosa (L.) DC. [PDF]

open access: yesJournal of the Serbian Chemical Society, 2011
The objective of this study was to estimate the antioxidative potential of Oxytropis pilosa (L.) DC. during the active vegetative period. The activities of the antioxidant enzymes (superoxide dismutase, catalase, peroxidase), the quantities of ...
STEVO NAJMAN   +2 more
doaj  

Autonomous propulsion of carbon nanotubes powered by a multienzyme ensemble [PDF]

open access: yes, 2008
Covalent attachment of the enzymes glucose oxidase and catalase to carbon nanotubes enables the tandem catalytic conversion of glucose and H2O2 formed to power autonomous movement of the nanotubes.
Browne, Wesley R.,   +2 more
core   +3 more sources

Synthesis and catalase activity of manganese (ii) complexes of cis-5-norbornene-endo-2, 3-dicarboxylic acid (ndaH2): x-ray crystal structure of [Mn(qb11-nda)(phen)2]• EtOH'H20\ud (phen = 1,10-phenanthroline) [PDF]

open access: yes, 1995
Manganese(II) chloride reacts with the sodium salt of cis-5-norbornene-endo- 2,3-dicarboxylic acid (ndaH2) in aqueous media to give the manganese(II) complex [Mn (nda)H20] (1).
Casey, Michael T.   +4 more
core  

Adaptive response to oxidative stress in the filamentous fungus Aspergillus niger B1-D [PDF]

open access: yes, 2008
In the present study, we used a recombinant filamentous fungus strain, Aspergillus niger B1-D, as a model system, and investigated the antioxidant defences in this organism.
Harvey, L.M., Li, Qiang, Mcneil, Brian
core   +1 more source

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