Results 221 to 230 of about 11,241,438 (272)
Some of the next articles are maybe not open access.
Antioxidant activity assay based on laccase-generated radicals
Analytical and Bioanalytical Chemistry, 2008A novel antioxidant activity assay was developed using laccase-oxidized phenolics. In a three-step approach, phenolic compounds were first oxidized by laccase. Laccase was then inhibited using 80% (v/v) methanol which also stabilized the oxidized phenolics which were then used to measure antioxidant activities of ascorbic acid and Trolox. From a number
Endry, Nugroho Prasetyo +5 more
openaire +2 more sources
Dual activity of laccase-lysine hybrid organic–inorganic nanoflowers for dye decolourization
, 2020The laccase-lysine hybrid nanoflower was prepared by mixing aqueous CuSO4 solution into phosphate buffer solution containing laccase and lysine in one pot. The prepared laccase-lysine hybrid nanoflowers exhibited dual catalytic activity, i.e.
S. Maurya, Shamraja S. Nadar, V. Rathod
semanticscholar +1 more source
Laccase Inhibiting Activity of Some Coumarin Derivatives
Letters in Organic Chemistry, 2014Seven coumarin derivatives were screened for their inhibitory effect on laccase utilizing ABTS and L- DOPA as substrates. 2-[(4-Methyl-2-oxo-2H-1- benzopyran-7-yl)oxy]acetic acid (E)-2- [(dihydroxyphenyl)methylene]hydrazides were proven to be stronger inhibitors than corresponding thiosemicarbazides when ABTS [2, 2'-azinobis(3- ethylbenzothiazoline-6 ...
Tišma, Marina +4 more
openaire +4 more sources
Specific immobilization of laccase onp-benzoquinone-activated supports
Biology of Metals, 1990A specific immobilization of laccase (EC 1.10.3.2) onto a ready-to-usep-benzoquinone-activated agarose support is described. The single-step procedure leads to a laccase protein coupling of I8% and an enzyme activity immobilization yield of 27%, while the retained specific activity of the immobilized enzyme was 150% of the specific activity of the free
Mateescu MA +4 more
openaire +2 more sources
Journal of Biochemical and Biophysical Methods, 2000
The reactions between Laccase (extracted from China lacquer of Rhus vernicifera) and various substrates (3,4-Dihydroxybenzaldehyde, Guaiacol, Pyrogallol, Gallic acid) have been studied using LKB-2107 batch microcalorimetry system. Based on calorimetry, a new method has been proposed. Laccase activity and the Michaelis constant K(m) have been determined
T, Wang +4 more
openaire +2 more sources
The reactions between Laccase (extracted from China lacquer of Rhus vernicifera) and various substrates (3,4-Dihydroxybenzaldehyde, Guaiacol, Pyrogallol, Gallic acid) have been studied using LKB-2107 batch microcalorimetry system. Based on calorimetry, a new method has been proposed. Laccase activity and the Michaelis constant K(m) have been determined
T, Wang +4 more
openaire +2 more sources
Laccase activity in soils: Considerations for the measurement of enzyme activity
Chemosphere, 2012Laccases (benzenediol: oxygen oxidoreductases, EC 1.10.3.2) are copper-containing enzymes that catalyze the oxidative conversion of a variety of chemicals, such as mono-, oligo-, and polyphenols and aromatic amines. Laccases have been proposed to participate in the transformation of organic matter and xenobiotics as well as microbial interactions ...
Ivana, Eichlerová +2 more
openaire +2 more sources
Laccase-catalyzed synthesis of optically active polyaniline
Synthetic Metals, 2007One step, simple and environmentally friendly enzymatic synthesis of optically active polyaniline in the bulk solution and on the surface of glass slides (in situ deposition) was developed. Fungal laccase from Trametes hirsuta was used as the catalyst of the oxidative polymerisation of aniline.
I.S. Vasil’eva +5 more
openaire +1 more source
Talanta: The International Journal of Pure and Applied Analytical Chemistry, 2021
Hui Huang +4 more
semanticscholar +1 more source
Hui Huang +4 more
semanticscholar +1 more source
Food Control, 2019
In this paper, the antimicrobial activity and mechanism of a laccase-catalyzed chitosan–gallic acid derivative were evaluated. The results showed that compared to the parent chitosan, the derivative could significantly inhibit the growth of Escherichia ...
Kangjing Li +4 more
semanticscholar +1 more source
In this paper, the antimicrobial activity and mechanism of a laccase-catalyzed chitosan–gallic acid derivative were evaluated. The results showed that compared to the parent chitosan, the derivative could significantly inhibit the growth of Escherichia ...
Kangjing Li +4 more
semanticscholar +1 more source