Some factors affecting the activities of dinitrophenol fungicides. II.-Use of g.l.c. partition data in studies of chemical structure/fungicidal activity against powdery mildew

1971 ◽  
Vol 2 (1) ◽  
pp. 41-43 ◽  
Author(s):  
D. R. Clifford ◽  
D. A. M. Watkins
Keyword(s):  
Powdery Mildew ◽  
Chemical Structure ◽  
Fungicidal Activity ◽  
Factors Affecting

scholarly journals Synthesis and Bioactivity of Novel Coumarin Derivatives

2011 ◽  
Vol 6 (12) ◽  
pp. 1934578X1100601
Author(s):  
Ai-Ying Guan ◽  
Chang-Ling Liu ◽  
Miao Li, Zhi-Nian Li ◽  
Ming-Xing Zhang ◽  
Hong Zhang
Keyword(s):  
Powdery Mildew ◽  
Fungicidal Activity ◽  
Optimal Structure ◽  
Test Results ◽  
Coumarin Derivatives ◽  
Keto Esters ◽  
Wheat Powdery Mildew ◽  
Grey Mold ◽  
Coumarin 7 ◽  
Methyl Phenyl

A series of coumarin derivatives (6-8) containing ( E)-methyl 2-(methoxyimino)-2-phenylacetate, ( E)-2-(methoxyimino )-N-methyl-2-phenylacetamide and methyl methoxy(phenyl)carbamate were synthesized from substituted resorcinols (1) and substituted β-keto esters (2) as starting material via cyclization and condensation reactions. The test results indicated that ( E)-methyl 2-{2-[(3-hexyl-4-methyl-coumarin-7-yloxy)methyl]phenyl}-2-(methoxyimino)acetate (6f) was the optimal structure with good fungicidal activity against cucumber grey mold (CGM) giving 100% control at 100 mg L−1 concentration, much higher than that of coumoxystrobin. Methyl 2-[(3,4-dimethyl-coumarin -7-yloxy)methyl]phenyl(methoxy)carbamate (8a) was another optimal structure with good fungicidal activity against wheat powdery mildew (WPM) showing 100% control at 50 mg L−1 concentration, at the same level as that of the commercial kresoxim-methyl, and very significantly higher than that of coumoxystrobin (no control against WPM at 400 mg L−1).

scholarly journals Studies of the loss of viability of bacterial aerosols: III. Factors affecting death rates of certain non-pathogens

1958 ◽  
Vol 56 (3) ◽  
pp. 389-403 ◽  
Author(s):  
Ronald M. Ferry ◽  
William F. Brown ◽  
Edwin B. Damon
Keyword(s):  
Petroleum Ether ◽  
Chemical Structure ◽  
Ambient Medium ◽  
Death Rates ◽  
Factors Affecting ◽  
Lipid Material ◽  
Quantitative Studies ◽  
Bacterial Aerosols ◽  
Micro Organisms ◽  
Physical And Chemical

1. Additional quantitative studies of the survival of micro-organisms in aerosols are reported.2. Substitution of nitrogen for oxygen in the ambient medium decreases k′2, the rate of secondary loss of viability ofM. candidus, Esch. coliandS. marcescens, by 30–50%.3. The rate of primary decay (k′1) ofEsch. colidoes not appear to be affected by a similar change of atmosphere.4. The rate of secondary decay, k′2, ofM. candidusappears to increase two-to three-fold for 10°C. increments in temperature.5. Treatment of suspensions ofEsch. coliwith petroleum ether alone or containing lipid material increases k′1in aerosols generated from such suspensions.6. Treatment ofMyco. phleiwith petroleum ether appears to lower resistance to subsequent sonic irradiation.These observations are consistent with the hypothesis that differences in the physical and chemical structure of micro-organisms are reflected in constants k′1, k′2and b.We gratefully acknowledge the effective interest of two former assistants, T. Grant Maple and Eugene Mills, as well as the careful, effective, and conscientious work of our technical assistants, Ann Barr, Nora Galins, Cynthia Hartwig, Grace C. Leigh, Elizabeth Neidhardt, Paulette Slaney and Martha Szerslip, who have at different times helped secure the data presented here. Mrs Joseph J. Ecker deserves special thanks for care in the preparation of the manuscript.

The hydrolysis of sulphur in relation to its fungicidal activity

1930 ◽  
Vol 20 (1) ◽  
pp. 32-44 ◽  
Author(s):  
H. Martin
Keyword(s):  
Powdery Mildew ◽  
Fungicidal Activity ◽  
Soft Soap ◽  
Fungicidal Action ◽  
Hydrolysis Of

1. It is suggested that the fungicidal action of sulphur upon the Erysiphaceae is due primarily to hydrolysis.2. The presence of alkali, which brings about an acceleration of this hydrolysis, should enhance the fungicidal properties of sulphur.3. An explanation is thus afforded of the inhibition of the fungicidal action of sulphur against the hop powdery mildew (Sphaerotheca humuli) by gelatine or saponin solutions when employed as the spreader and of the promotion of fungicidal action in the presence of soft soap and alkali casein solutions.4. Attention is drawn to analogies between the action of sulphur upon the mildew and upon copper.5. Current views relative to the fungicidal action of sulphur are discussed from the standpoint of the hydrolysis hypothesis.

scholarly journals Biological activity of benzoxazolinone and benzoxazolinthione derivatives

2021 ◽  
Vol 258 ◽  
pp. 04017
Author(s):  
K Giyasov ◽  
G. S. Turaeva ◽  
H T Turaeva
Keyword(s):  
Biological Activity ◽  
Powdery Mildew ◽  
Fungicidal Activity ◽  
Butyl Ester ◽  
Growing Season ◽  
Erysiphe Graminis ◽  
Carbamic Acid ◽  
Fungicidal Action ◽  
Derivatives Of

The article presents the herbicidal, defoliating, fungicidal properties of the synthesized derivatives of benzoxazolinones and benzoxazolinethions. It was shown that 3-alkylbenzoxazolinones, 3-alkyl-6-halobenzoxazolinones and 2-alkylthiobenzoxazoles exhibit herbicidal action during the growing season of plants, and they also cause cotton leaves to drop up to 70%. It was found that 3-alkylbenzoxazolinones and 2-alkylthiobenzoxazoles exhibited fungicidal activity against the pathogen, Fugarium oxyporum and Verticillum dahlia. Among them, 2-methylthiobenzoxazole inhibited spores of the fungi Verticillum dahlia by 96.4% and benzoxazolyl-2-carbamic acid butyl ester by 65%. These compounds exhibit fungicidal action against the pathogens of powdery mildew on cucumbers - Erysiphe cichoraceorum and powdery mildew on wheat - Erysiphe graminis, approaching the control Karatan. Apparently, these compounds are chemicals of contact action.

scholarly journals Factors Affecting the Rate of Breast Cancer; Role of Heavy Metals

2020 ◽  
Vol 11 (3) ◽  
pp. 57-64
Author(s):  
Shabbir Hussain ◽  
Sumra Naseer ◽  
Muhammad Waqas ◽  
Samina Ashraf ◽  
Aisha Saddiqa ◽  
...  
Keyword(s):  
Breast Cancer ◽  
Redox Reactions ◽  
Chemical Structure ◽  
Epidemiologic Studies ◽  
Oxidation States ◽  
International Agency ◽  
Factors Affecting ◽  
Potential Risk Factors ◽  
Breast Cells

Breast cancer is caused by uncontrolled growth of breast cells. It is more common in women as compared tothat in men. The breast cancer may be interlinked with the drinking of alcohol, smoking, sex, hormonal therapy, obesity,family history and age. Various epidemiologic studies suggest the role of metals e.g., nickel (Ni), zinc (Zn), arsenic(As),selenium (Se)and cadmium (Cd)as potential risk factors in breast cancer. Humans are exposed to these metals bymeans of drinking water, food and air. The oxidative theory suspects that the complexes formed from these metals invivo, near the location of DNA, catalyze the redox reactions which results in oxidation of DNA. The metals like arsenic(As), chromium (Cr), aluminum (Al), cadmium (Cd) and chromium (Cr)which exist in trace amount are considered ascarcinogens for organisms by IARC (International Agency for Research on Cancer). The carcinogenicity of these metalsmainly depends upon their chemical structure and oxidation states.

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