Bleaching Activity of 4-Phenyl-3-(substituted benzylthio)-4H-1,2,4-triazoles

2002 ◽  
Vol 66 (8) ◽  
pp. 1671-1676 ◽  
Author(s):  
Naotaka YAMADA ◽  
Daisuke KUSANO ◽  
Eiich KUWANO
Keyword(s):  
Bleaching Activity

Carotene-Bleaching activity in plant tissue extracts

1970 ◽  
Vol 21 (1) ◽  
pp. 35-38 ◽  
Author(s):  
J. A. Blain
Keyword(s):  
Plant Tissue ◽  
Tissue Extracts ◽  
Bleaching Activity

Economy of Broach During the Seventeenth Century - Gains from the Bleaching Activity

2001 ◽  
Vol 28 (1-2) ◽  
pp. 68-83
Author(s):  
Shantha Hariharan
Keyword(s):  
Seventeenth Century ◽  
Bleaching Activity

scholarly journals Synthesis and Bleaching Activity of 3-Propargylthio-4-(substituted phenyl)-4H-1, 2, 4-triazoles

1995 ◽  
Vol 20 (3) ◽  
pp. 291-297 ◽  
Author(s):  
Koji TAKEHARA ◽  
Naotaka YAMADA ◽  
Hidetoshi HAKIRA ◽  
Eiichi KUWANO ◽  
Eiji TANIGUCHI
Keyword(s):  
Bleaching Activity

Bleaching Activity of New 2-Phenylpyridazinones: Structure-Activity Relationship

1982 ◽  
Vol 37 (11-12) ◽  
pp. 1092-1094 ◽  
Author(s):  
Gerhard Sandmann ◽  
Peter Böger
Keyword(s):  
Quantitative Structure Activity Relationship ◽  
Structure Activity Relationship ◽  
Activity Relationship ◽  
Pigment Formation ◽  
Meta Position ◽  
Phytotoxic Activity ◽  
Structure Activity ◽  
Lipophilicity Parameter ◽  
Bleaching Activity ◽  
Plant Pigment

Abstract New 2-phenylpyridazinones, analogs of 4-chloro-5-methylamino-2-phenylpyridazin-3(2H)ones, were assayed for their phytotoxic activity to interfere with plant pigment formation. Six derivatives with - SCF3, - OCF2CHFCF3, - OCHF2, - CN, or - Br in meta position of the phenyl ring exhibited similar or better bleaching activity than the m-CF3 analog (norflurazon). The activity is predominantly determined by positive σ values and by lipophilicity of the substituent. On the basis of 11 analogs, a quantitative structure-activity relationship by a Hansch equation was accomplished with σm and the lipophilicity parameter π as variables.

scholarly journals Synthesis and Bleaching Activity of 1-Ethyl-and 1-Propyl-5-Substituted Imidazoles

10.5109/24434 ◽  
2001 ◽  
Vol 46 (1) ◽  
pp. 219-228
Author(s):  
Naotaka Yamada ◽  
Eiichi Kuwano
Keyword(s):  
Bleaching Activity

Bleaching activity and chemical constitution of phenylpyridazinones

1981 ◽  
Vol 15 (3) ◽  
pp. 288-293 ◽  
Author(s):  
G. Sandmann ◽  
K.-J. Kunert ◽  
P. Böger
Keyword(s):  
Bleaching Activity ◽  
Chemical Constitution

Carotene bleaching activity of tomato extracts

1968 ◽  
Vol 19 (12) ◽  
pp. 713-717 ◽  
Author(s):  
J. A. Blain ◽  
J. D. E. Patterson ◽  
M. Pearce
Keyword(s):  
Bleaching Activity

scholarly journals Synthesis, Bleaching Activity, and Germination Promoting Activity of 3,4-Disubstituted-4H-1,2,4-triazoles

10.5109/24461 ◽  
2002 ◽  
Vol 47 (1) ◽  
pp. 67-76
Author(s):  
Naotaka Yamada ◽  
Daisuke Kusano ◽  
Eiichi Kuwano
Keyword(s):  
Bleaching Activity

Comparison of the Bleaching Activity of Norflurazon and Oxyfluorfen

Weed Science ◽  
1983 ◽  
Vol 31 (3) ◽  
pp. 338-341 ◽  
Author(s):  
Gerhard Sandmann ◽  
Peter Böger
Keyword(s):  
Fatty Acids ◽  
Polyunsaturated Fatty Acids ◽  
Phycomyces Blakesleeanus ◽  
Photosynthetic Membranes ◽  
Scenedesmus Acutus ◽  
Bleaching Activity ◽  
Carotene Synthesis

The bleaching effects of norflurazon [4-chloro-5-(methylamino)-2-(α,α,α-trifluoro-m-tolyl)-3 (2H)-pyridazinone] and of oxyfluorfen [2-chloro-1-(3-ethoxy-4-nitrophenoxy)-4-(trifluoromethyl) benzene] were compared using the intact microalgaScenedesmus acutusand the fungusPhycomyces blakesleeanus.Under the influence of oxyfluorfen, but not of norflurazon, pigments and membranes were degraded. This activity is typical for oxyfluorfen. Norflurazon prevented carotene synthesis, but did not cause degradation of carotenoids, chlorophylls, or35S-sulfolipid, a marker of photosynthetic membranes. Furthermore, light-induced ethane evolution byScenedesmusis substantial with oxyfluorfen, but not with norflurazon present. Oxyfluorfen apparently causes radical-initiated peroxidation of polyunsaturated fatty acids.

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