Results 191 to 200 of about 306,357 (240)

New Method for Accurate Determination of Polyphenol Oxidase Activity Based on Reduction in SERS Intensity of Catechol.

Journal of Agricultural and Food Chemistry, 2018
Rapid and accurate measurement of polyphenol oxidase (PPO) activity is important in the food industry as PPOs play a vital role in catalyzing enzymatic reactions.
Ting-tiao Pan, Da‐Wen Sun, J. Paliwal, Hongbin Pu, Qingyi Wei   +4 more
semanticscholar   +1 more source

Reaction mechanism of grape catechol oxidase—a kinetic study

Phytochemistry, 1976
Abstract The initial velocity of the oxidation of 4-methylcatechol by grape catechol oxidase was determined. The kinetic analysis indicates that first there is random binding of an oxygen and a 4-methylcatechol molecule to the enzyme. Then one product molecule is released prior to the binding of second 4-methylcatechol molecule which is followed by ...
H.R. Lerner, A.M. Mayer
openaire   +1 more source

Isolation and characterization of catechol oxidase from Solanum melongena

Phytochemistry, 1980
Abstract Catechol oxidase was distributed in soluble and particulate fractions of Solanum melongena . The purified preparation appears to be homogeneous by polyacrylamide gel electrophoresis. The enzyme shows two pH maxima—with catechol, 6.5 and 7.5; and with dopa, 6.5 and 7.9. The latent form of the enzyme does not occur in S. melongena .
Rakesh C. Sharma, Rashid Ali
openaire   +1 more source

Catechol oxidase: Enzymic liberation from sugar beet chloroplasts

Phytochemistry, 1966
Abstract Catechol oxidase present in isolated sugar beet chloroplasts is activated by means of proteolytic enzymes. The most effective treatment is a combination of trypsin and carboxypeptidase a. This gives a fourfold activation and releases the catechol oxidase from its bound form.
openaire   +1 more source

Metformin-based copper(II) complexes: synthesis, structural characterization and mimicking activity of catechol oxidase and phenoxazinone synthase

Journal of Materials Science, 2020
A. Ramadan, S. Shaban, M. Ibrahim, S. Sallam, F. I. El-Shami, S. Al-Juaid   +5 more
semanticscholar   +1 more source

Impressive promiscuous biomimetic models of ascorbate, amine, and catechol oxidases

Journal of Inorganic Biochemistry
Copper metalloenzymes ascorbate oxidase (AOase), amine oxidase (AmOase), and catechol oxidase (COase) possess copper(II) sites of coordination, which are trimeric, homodimeric, and dimeric, respectively. Two newly mononuclear copper(II) complexes, namely, [Cu(L)(bpy)](ClO4) (1) and [Cu(L)(phen)](ClO4) (2) where HL = Schiff base, have been synthesized ...
Balasubramaniam, Selvakumaran, Mariappan, Murali, Selvaraj, Shanmugavadivel, Venkatesan, Sindhuja, Velusamy, Sathya   +4 more
openaire   +2 more sources

Design and catalytic studies of structural and functional models of the catechol oxidase enzyme

JBIC Journal of Biological Inorganic Chemistry, 2020
Aarón Terán, Aida Jaafar, A. E. Sánchez-Peláez, M. Torralba, Á. Gutiérrez   +4 more
semanticscholar   +1 more source

Catalytic activity of Mn(III) and Co(III) complexes: evaluation of catechol oxidase enzymatic and photodegradation properties

Research on chemical intermediates (Print), 2020
M. S. Khan, M. Khalid, M. Ahmad, M. Shahid, Musheer Ahmad   +4 more
semanticscholar   +1 more source

Catechol Oxidase in Tissue 4

Journal of Experimental Botany, 1977
RUTH VOLK, E. HAREL, A. M. MAYER, ESTHER GAN-ZVI   +3 more
openaire   +1 more source

MnO2 nanosheets based catechol oxidase mimics for robust electrochemical sensor: Synthesis, mechanism and its application for ultrasensitive and selective detection of dopamine

Chemical Engineering Journal
Yaru Zhang, Zhenchao Li, Xin Zhang, Mingyang Wang, Ziting Lin, Ying Zhang, Aihua Liu   +6 more
semanticscholar   +1 more source