scholarly journals Generation of blue chrysanthemums by anthocyanin B-ring hydroxylation and glucosylation and its coloration mechanism

2017 ◽  
Vol 3 (7) ◽  
pp. e1602785 ◽  
Author(s):  
Naonobu Noda ◽  
Satoshi Yoshioka ◽  
Sanae Kishimoto ◽  
Masayoshi Nakayama ◽  
Mitsuru Douzono ◽  
...  
Keyword(s):  
Ring Hydroxylation

Ring Hydroxylation of [o-3H]Methoxychlor as a Probe for Liver Microsomal CYP2B Activity: Potential forin VivoCYP2B Assay

1996 ◽  
Vol 233 (1) ◽  
pp. 100-107 ◽  
Author(s):  
David M. Stresser ◽  
Shangara S. Dehal ◽  
David Kupfer
Keyword(s):  
Ring Hydroxylation

The 4-tert-Butylphenol-Utilizing BacteriumSphingobium fuliginisOMI Can Degrade Bisphenols via Phenolic Ring Hydroxylation andMeta-Cleavage Pathway

2012 ◽  
Vol 47 (2) ◽  
pp. 1017-1023 ◽  
Author(s):  
Yuka Ogata ◽  
Shohei Goda ◽  
Tadashi Toyama ◽  
Kazunari Sei ◽  
Michihiko Ike
Keyword(s):  
Phenolic Ring ◽  
Ring Hydroxylation

Metabolism of 2-(α-naphthoxy)-N,N-diethyl propionamide in Tomato

Weed Science ◽  
1973 ◽  
Vol 21 (1) ◽  
pp. 11-15 ◽  
Author(s):  
J. J. Murphy ◽  
Janice Didriksen ◽  
R. A. Gray
Keyword(s):  
Lycopersicon Esculentum ◽  
Water Soluble ◽  
Tomato Plants ◽  
Mechanical Harvester ◽  
Ring Hydroxylation

Metabolism of the herbicide 2-(α-naphthoxy)-N,N-diethyl propionamide (R-7465) by tomato plants (Lycopersicon esculentum Mill. ‘Mechanical Harvester’) was investigated. Ring-labeled R-7465-14C was taken up rapidly by the roots and distributed throughout the leaves within 8 hr. R-7465 was converted primarily into water soluble metabolites. The principal metabolite was identified as a hexose conjugate of 2-(α-naphthoxy-4-hydroxy)-N,N-diethyl propionamide. This metabolite represented 47% of the soluble radioactivity in the plant. A different hexose conjugate of 2-(α-naphthoxy-4-hydroxy)-N,N-diethyl propionamide together with a hexose conjugate of 2-(α-naphthoxy-4-hydroxy)-N-ethyl propionamide accounted for another 22% of the radioactivity. Nonmetabolized R-7465 was found to represent only 5% of the total soluble radioactivity. Other identified metabolites included 2-(α-napthoxy)-N-ethyl propionamide, 2-(α-naphthoxy-5-hydroxy)-N,N-diethyl propionamide, and 1,4-naphthoquinone. None of these metabolites individually represented more than 3% of the soluble radioactivity in the plants. Ring hydroxylation and N-dealkylation appeared to be the initial steps in detoxification of R-7465 followed by conjugation with sugars.

scholarly journals Ring-and N-hydroxylation of 2-acetamidofluorene by rat liver reconstituted cytochrome P-450 enzyme system

1975 ◽  
Vol 150 (3) ◽  
pp. 561-564 ◽  
Author(s):  
P D Lotlikar ◽  
K Zaleski
Keyword(s):  
Cytochrome C ◽  
Rat Liver ◽  
Enzyme System ◽  
Partial Purification ◽  
Hydroxylated Metabolites ◽  
Triton X ◽  
Cytochrome P 450 ◽  
Ring Hydroxylation ◽  
Hydroxylation Activity ◽  
Nadph Cytochrome C Reductase

The N- and ring-hydroxylation of 2-acetamidofluorene were studied with a reconstituted cytochrome P-450 enzyme from microsomal fractions of liver from both control and 3-methylcholanthrene-pretreated rats. Proteinase treatment and Triton X-100 solubilization were two important steps for partial purification of the cytochrome P-450 fraction. Both cytochrome P-450 and NADPH-cytochrome c reductase fractions were required for optimum N- and ring-hydroxylation activity. Hydroxylation activity was determined by the source of cytochrome P-450 fraction; cytochrome P-450 fraction from pretreated animals was severalfold more active than the fraction from controls. Formation of N-hydroxylated metabolites with reconstituted systems from both control and pretreated animals was greater than that with their respective whole microsomal fractions.

Characterization of a polycyclic aromatic ring-hydroxylation dioxygenase from Mycobacterium sp. NJS-P

Chemosphere ◽  
2017 ◽  
Vol 185 ◽  
pp. 67-74 ◽  
Author(s):  
Jun Zeng ◽  
Qinghe Zhu ◽  
Yucheng Wu ◽  
Hong Chen ◽  
Xiangui Lin
Keyword(s):  
Aromatic Ring ◽  
Polycyclic Aromatic ◽  
Ring Hydroxylation

ChemInform Abstract: NOVEL RING HYDROXYLATION OF ALOE-EMODIN AND FURTHER ELABORATION TO ANTHRACYCLINE SYNTHONS

1980 ◽  
Vol 11 (22) ◽  
Author(s):  
J. ALEXANDER ◽  
A. V. BHATIA ◽  
G. W. III CLARK ◽  
A. LEUTZOW ◽  
L. A. MITSCHER ◽  
...  
Keyword(s):  
Aloe Emodin ◽  
Ring Hydroxylation

scholarly journals Degradation of homovanillate by a strain ofVariovorax paradoxusvia ring hydroxylation

1995 ◽  
Vol 134 (2-3) ◽  
pp. 213-219 ◽  
Author(s):  
Nigel Allison ◽  
Janet E. Turner ◽  
Robin Wait
Keyword(s):  
Ring Hydroxylation

scholarly journals Photocatalytic degradation of metoxuron in aqueous suspensions ofTiO2. Analytical and kinetic studies

2002 ◽  
Vol 4 (4) ◽  
pp. 147-151 ◽  
Author(s):  
Amina Amine Khodja ◽  
Bernadette Lavedrine ◽  
Claire Richard ◽  
Tahar Sehili
Keyword(s):  
Photocatalytic Activity ◽  
Specific Surface ◽  
Photocatalytic Degradation ◽  
Surface Area ◽  
Specific Surface Area ◽  
Kinetic Studies ◽  
Photocatalytic Efficiency ◽  
Aqueous Suspensions ◽  
Degussa P25 ◽  
Ring Hydroxylation

The photocatalytic degradation of metoxuron [3-(3-chloro-4-methoxyphenyl)-1,1-dimethylurea] in aqueous suspensions ofTiO2was investigated. Several intermediate photoproducts were identified using NMR and MS techniques. Oxidation or removal of the methyl of terminal nitrogen and ring hydroxylation were found to occur. 2-Propanol was shown to decrease the rate of photocatalytic degradation, inhibiting partly ring hydroxylation and completely reactions on terminal nitrogen. In contrast, basification of the suspensions accelerated the degradation significantly. Degussa P25TiO2was found to exhibit a higher photocatalytic activity than MillenniumTiO2in spite of a generally smaller specific surface area. Within the MillenniumTiO2series, the photocatalytic efficiency increased with the specific surface area.

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