Phenylurea
Mostrando 1-12 de 21 artigos, teses e dissertações.
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1. New aminoporphyrins bearing urea derivative substituents: synthesis, characterization, antibacterial and antifungal activity
This work studied the synthesis of 5,10,15-tris(4-aminophenyl)-20-(N,N-dialkyl/diaryl-N-phenylurea) porphyrins (P1-P4 with alkyl or aryl groups of Ph, iPr, Et and Me, respectively) and also the preparation of their manganese (III) and cobalt (II) complexes (MnP and CoP). The P1-P4 ligands were characterized by different spectroscopic techniques (1H NMR, FTIR
Braz. arch. biol. technol.. Publicado em: 2015-06
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2. Thidiazuron effects on shoot growth, return bloom, fruit set and nutrition of apples.
Apple (Malus domestica Borkh.) trees, cultivars Gala and Fuji, were sprayed at full bloom with thidiazuron (TDZ) at doses of 0, 5, 10, or 20 g ha-1 of a.i. in order to evaluate its effects on plant growth and development, return bloom, fruit set, nutrition, and fruit yield. Fruit set increased with TDZ dose in 'Gala' but not in 'Fuji'. TDZ did not affect fru
Pesquisa Agropecuária Brasileira. Publicado em: 2011
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3. Avaliação de fungos com potencial de degradação com diuron e pyrithiobac-sodium
Pyrithiobac-sodium is a post-emergence herbicide for early application, registered for broadIeaves control in cotton crops. Diuron is a phenylurea used for weed control on non-crop areas and selectively on crops such as cotton, sugarcane, citrus and pineapple. At present, this herbicide is one of the IDOst used in Brazil. Experiments were carried out in gree
Publicado em: 2003
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4. Retardation of Senescence in Red Clover Leaf Discs by a New Antiozonant, N-[2-(2-Oxo-1-imidazolidinyl)ethyl]-N′-phenylurea 1
Dark-induced senescence in leaf discs from O3-sensitive red clover trifoliates (Trifolium pratense L. cv. `Pennscott') was markedly retarded by treatment with N-[2-(2-oxo-1-imidazolidinyl)ethyl-N′-phenylurea (EDU). EDU also protects against acute and chronic foliar O3 injury when sprayed on intact leaves or supplied to the plants through soil application.
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5. Degradation of Substituted Phenylurea Herbicides by Arthrobacter globiformis Strain D47 and Characterization of a Plasmid-Associated Hydrolase Gene, puhA
Arthrobacter globiformis D47 was shown to degrade a range of substituted phenylurea herbicides in soil. This strain contained two plasmids of approximately 47 kb (pHRIM620) and 34 kb (pHRIM621). Plasmid-curing experiments produced plasmid-free strains as well as strains containing either the 47- or the 34-kb plasmid. The strains were tested for their ability
American Society for Microbiology.
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6. Isolation from Agricultural Soil and Characterization of a Sphingomonas sp. Able To Mineralize the Phenylurea Herbicide Isoproturon
A soil bacterium (designated strain SRS2) able to metabolize the phenylurea herbicide isoproturon, 3-(4-isopropylphenyl)-1,1-dimethylurea (IPU), was isolated from a previously IPU-treated agricultural soil. Based on a partial analysis of the 16S rRNA gene and the cellular fatty acids, the strain was identified as a Sphingomonas sp. within the α-subdivision
American Society for Microbiology.
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7. Degradation of Linuron and Some Other Herbicides and Fungicides by a Linuron-Inducible Enzyme Obtained from Bacillus sphaericus
Linuron [3-(3,4-dichlorophenyl)-1-methoxy-1-methylurea] induces the formation of an enzyme (acylamidase) responsible for the degradation of a large variety of different herbicides and fungicides of the acylanilide and phenylurea type. The former type is degraded at a rate at least 10 times higher than the latter.
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8. Engineering Herbicide Metabolism in Tobacco and Arabidopsis with CYP76B1, a Cytochrome P450 Enzyme from Jerusalem Artichoke1
The Jerusalem artichoke (Helianthus tuberosus) xenobiotic inducible cytochrome P450, CYP76B1, catalyzes rapid oxidative dealkylation of various phenylurea herbicides to yield nonphytotoxic metabolites. We have found that increased herbicide metabolism and tolerance can be achieved by ectopic constitutive expression of CYP76B1 in tobacco (Nicotiana tabacum) a
American Society of Plant Physiologists.
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9. Expression of a soybean cytochrome P450 monooxygenase cDNA in yeast and tobacco enhances the metabolism of phenylurea herbicides
A strategy based on the random isolation and screening of soybean cDNAs encoding cytochrome P450 monooxygenases (P450s) was used in an attempt to identify P450 isozymes involved in herbicide metabolism. Nine full-length (or near-full-length) P450 cDNAs representing eight distinct P450 families were isolated by using PCR-based technologies. Five of the s
The National Academy of Sciences.
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10. Degradation of Urea Herbicides by Cell-Free Extracts of Bacillus sphaericus
N′-methoxy phenylurea herbicides are degraded by induced cells of Bacillus sphaericus ATCC 12123 by liberating carbon dioxide from the ureido portion of the molecule and leaving the corresponding aniline moieties. Cell-free extracts of B. sphaericus inactivate these herbicides in the same way as reported for whole cells. A 6.6-fold purification of the crud
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11. Growth in Coculture Stimulates Metabolism of the Phenylurea Herbicide Isoproturon by Sphingomonas sp. Strain SRS2
Metabolism of the phenylurea herbicide isoproturon by Sphingomonas sp. strain SRS2 was significantly enhanced when the strain was grown in coculture with a soil bacterium (designated strain SRS1). Both members of this consortium were isolated from a highly enriched isoproturon-degrading culture derived from an agricultural soil previously treated regularly w
American Society for Microbiology.
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12. Degradation of Chlorbromuron and Related Compounds by the Fungus Rhizoctonia solani1
The ability of the soil fungus Rhizoctonia solani to degrade phenyl-substituted urea herbicides was investigated. The fungus was able to transform chlorbromuron [3-(3-chloro-4-bromophenyl)-1-methyl-1-methoxyurea] to the demethylated product [3-(3-chloro-4-bromophenyl)-1-methoxyurea], which was isolated and identified. Evidence was obtained that further degra