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https://www.readbyqxmd.com/read/27820678/isolation-and-characteristics-of-sulfentrazone-degrading-bacteria
#1
Christiane A D Melo, André M Massenssini, Ana Beatriz R J Passos, Felipe P Carvalho, Lino R Ferreira, Antonio Alberto Silva, Maurício D Costa
This study aimed to isolate and characterize bacteria able to use sulfentrazone in the commercial formulation as their sole carbon source. The isolation of the potential sulfentrazone-degrading bacteria was made from soil samples with a recent history of herbicide application and from isolates identified through rDNA sequencing. Subsequently, we assessed the growth of the isolates and their sulfentrazone degradation ability using high-performance liquid chromatography. Twenty-six potential sulfentrazone-degrading bacterial isolates were obtained in pure culture...
November 7, 2016: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/27779324/fate-and-risk-of-atrazine-and-sulfentrazone-to-non-target-species-at-an-agriculture-site
#2
Jordan L Thorngren, Amanda D Harwood, Tracye M Murphy, Kara E Huff Hartz, Courtney Y Fung, Michael J Lydy
The current study evaluated the risk associated with the application and co-occurrence of two herbicides, atrazine and sulfentrazone, applied to a 32 ha corn and soybean rotational field. Field concentrations of the compounds were measured in soil, runoff water and groundwater, with peak mean atrazine and sulfentrazone concentrations found in the soil (144 ng/g dry weight (dw), and 318 ng/g dw, respectively). Individual and mixture laboratory bioassays were conducted to determine the effects of atrazine and sulfentrazone on the survival of Daphnia magna and Pimephales promelas, the germination of Lactuca sativa, and the growth of Pseudokirchneriella subcapita, and Lemna minor...
October 25, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/26865479/reduced-sulfentrazone-phytotoxicity-through-increased-adsorption-and-anionic-species-in-biochar-amended-soils
#3
Kailin Liu, Bingqi Yu, Kun Luo, Xiangying Liu, Lianyang Bai
Burning straw in the field is a common agricultural practice. The effects of adding biochar derived from rice straw to soils on the phytotoxicity of sulfentrazone to Oryza sativa L. were observed. Overall, when 1 % biochar was added to three different soils, the phytotoxicity of sulfentrazone to O. sativa L. decreased, and the concentration that inhibits growth by 50 % (IC50) increased by 1.4 to 7.6 times. To illuminate the influencing mechanisms, the changes in sulfentrazone adsorption to the soil, the soil pH, and the bioavailable sulfentrazone extracted from the soil solution using hollow fiber-based liquid-phase microextraction were studied...
May 2016: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/26802513/sulfentrazone-dechlorination-by-iron-nickel-bimetallic-nanoparticles
#4
Mayra A Nascimento, Renata P Lopes, Jean C Cruz, Antônio A Silva, Claudio F Lima
The sulfentrazone dechlorination using bimetallic nanoparticles of Fe/Ni was studied. Different variables that could influence the sulfentrazone conversion were investigated, such as nitrogen atmosphere, pH and dosage of the nanoparticles and initial concentration of sulfentrazone. The best results were obtained using controlled pH (pH 4.0) and 1.0 g L(-1) of nanomaterials, resulting in 100 % conversion in only 30 min. Kinetic studies were also conducted, evaluating the influence of different nanoparticle dosages (1...
April 2016: Environmental Pollution
https://www.readbyqxmd.com/read/26728549/synthesis-herbicidal-activity-and-qsar-of-novel-n-benzothiazolyl-pyrimidine-2-4-diones-as-protoporphyrinogen-oxidase-inhibitors
#5
Yang Zuo, Qiongyou Wu, Sun-Wen Su, Cong-Wei Niu, Zhen Xi, Guang-Fu Yang
Protoporphyrinogen oxidase (PPO, E.C. 1.3.3.4) is known as a key action target for several structurally diverse herbicides. As a continuation of our research work on the development of new PPO-inhibiting herbicides, a series of novel 3-(2'-halo-5'-substituted-benzothiazol-1'-yl)-1-methyl-6-(trifluoromethyl)pyrimidine-2,4-diones 9 were designed and synthesized. The bioassay results indicated that a number of the newly synthesized compounds exhibited higher inhibition activity against tobacco PPO (mtPPO) than the controls, saflufenacil and sulfentrazone...
January 27, 2016: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/26386773/induction-of-mitotic-and-chromosomal-abnormalities-on-allium-cepa-cells-by-pesticides-imidacloprid-and-sulfentrazone-and-the-mixture-of-them
#6
Jaqueline Bianchi, Thais Cristina Casimiro Fernandes, Maria Aparecida Marin-Morales
To evaluate the cytotoxic and genotoxic effects of low concentrations of pesticides in non-target organisms, seeds of Allium cepa were exposed for 24 h to the imidacloprid insecticide, sulfentrazone herbicide and to the mixture of them, followed by recovery periods of 48 and 72 h. Imidacloprid results indicated an indirect genotoxic effect by inducing different types of chromosome aberration (CA), mainly bridges and chromosomal adherences. Cells with micronucleus (MN) were not significant in the analyzed meristems...
February 2016: Chemosphere
https://www.readbyqxmd.com/read/26074310/toxicogenetic-effects-of-low-concentrations-of-the-pesticides-imidacloprid-and-sulfentrazone-individually-and-in-combination-in-in-vitro-tests-with-hepg2-cells-and-salmonella-typhimurium
#7
Jaqueline Bianchi, Diogo Cavalcanti Cabral-de-Mello, Maria Aparecida Marin-Morales
The insecticide imidacloprid and the herbicide sulfentrazone are two different classes of pesticides that are used for pest control in sugarcane agriculture. To evaluate the genotoxic potential of low concentrations of these two pesticides alone and in mixture, the comet assay and the micronucleus (MN) test employing fluorescence in situ hybridization (FISH) with a centromeric probe were applied in human hepatoma cell lines (HepG2), in a 24-h assay. Mutagenicity was assessed by Salmonella/microsome assay with TA98 and TA100 strains in the absence and presence of an exogenous metabolizing system (S9)...
October 2015: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/25072201/the-validation-of-an-analytical-method-for-sulfentrazone-residue-determination-in-soil-using-liquid-chromatography-and-a-comparison-of-chromatographic-sensitivity-to-millet-as-a-bioindicator-species
#8
Marcelo Antonio de Oliveira, Fábio Ribeiro Pires, Mariana Ferraço, Alessandra Ferreira Belo
Commonly used herbicides, such as sulfentrazone, pose the risk of soil contamination due to their persistence, bioaccumulation and toxicity. Phytoremediation by green manure species has been tested using biomarkers, but analytical data are now required to confirm the extraction of sulfentrazone from soil. Thus, the present work was carried out to analyze sulfentrazone residues in soil based on liquid chromatography with a comparison of these values to the sensitivity of the bioindicator Pennisetum glaucum. The soil samples were obtained after cultivation of Crotalaria juncea and Canavalia ensiformis at four seeding densities and with three doses of sulfentrazone...
2014: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/24923624/a-quick-easy-cheap-effective-rugged-and-safe-method-for-the-simultaneous-detection-of-four-triazolone-herbicides-in-cereals-combined-with-ultrahigh-performance-liquid-chromatography-with-tandem-mass-spectrometry
#9
Yan Tao, Jun Xu, Xingang Liu, Youpu Cheng, Na Liu, Zenglong Chen, Fengshou Dong, Yonguan Zheng
This paper describes a novel, rapid, and sensitive analytical method for monitoring four triazolone herbicides in cereals (wheat, rice, corn, and soybean), using a quick, easy, cheap, effective, rugged, and safe sample extraction procedure followed by ultrahigh performance liquid chromatography coupled with tandem mass spectrometry. The four triazolone herbicides (amicarbazone, carfentrazone-ethyl, sulfentrazone, and thiencarbazone-methyl) were extracted using acidified acetonitrile (containing 1% v/v formic acid) and subsequently purified with octadecylsilane (C18 ) prior to sample analysis...
September 2014: Journal of Separation Science
https://www.readbyqxmd.com/read/24295204/reduced-herbicide-leaching-by-in-situ-adsorption-of-herbicide-micelle-formulations-to-soils
#10
Haim Katz, Yael G Mishael
Aiming to reduce herbicide leaching, "in situ" adsorption of herbicide-micelle formulations to soils was explored. Sulfentrazone or metolachlor were solubilized in cationic micelles, and these herbicide-micelle formulations were applied to sandy and alluvial soils. Sulfentrazone adsorption to the soils was negligible; however, its adsorption via its solubilization in micelles and their adsorption to the soil was significant and in good agreement with the Freundlich and Langmuir models. Adsorption of solubilized herbicide to the sandy soil was higher than to the alluvial soil...
January 8, 2014: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/24031483/microbial-degradation-of-sulfentrazone-in-a-brazilian-rhodic-hapludox-soil
#11
Camila O Martinez, Celia Maria M S Silva, Elisabeth F Fay, Rosangela B Abakerli, Aline H N Maia, Lucia R Durrant
Sulfentrazone is amongst the most widely used herbicides for treating the main crops in the State of São Paulo, Brazil, but few studies are available on the biotransformation of this compound in Brazilian soils. Soil samples of Rhodic Hapludox soil were supplemented with sulfentrazone (0.7 µg active ingredient (a.i.) g(-1) soil) and maintained at 27°C. The soil moisture content was corrected to 30, 70 or 100 % water holding capacity (WHC) and maintained constant until the end of the experimental period. Herbicide-free soil samples were used as controls...
January 2010: Brazilian Journal of Microbiology: [publication of the Brazilian Society for Microbiology]
https://www.readbyqxmd.com/read/23638891/sorption-and-desorption-of-sulfentrazone-in-brazilian-soils
#12
Ana Beatriz R J Passos, Marco Antonio M Freitas, Lívia G Torres, Antonio A Silva, Maria Eliana L R Queiroz, Cláudio F Lima
This study was undertaken to obtain information about the behavior of sulfentrazone in soil by evaluating the sorption and desorption of the herbicide in different Brazilian soils. Batch equilibrium method was used and the samples were analyzed by high performance liquid chromatography. Based on the results obtained from the values of Freundlich constants (Kf), we determined the order of sorption (Haplic Planosol < Red-Yellow Latosol < Red Argisol < Humic Cambisol < Regolitic Neosol) and desorption (Regolitic Neosol < Red Argisol < Humic Cambisol < Haplic Planosol < Red-Yellow Latosol) of sulfentrazone in the soils...
2013: Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes
https://www.readbyqxmd.com/read/23623257/design-and-synthesis-of-1-benzothiazol-5-yl-1h-1-2-4-triazol-5-ones-as-protoporphyrinogen-oxidase-inhibitors
#13
Zuo Yang, Yang Sheng-Gang, Luo Yan-Ping, Tan Ying, Hao Ge-Fei, Wu Qiong-You, Xi Zhen, Yang Guang-Fu
Protoporphyrinogen oxidase (PPO, E.C. 1.3.3.4) is the action target for several structurally diverse herbicides. A series of novel 4-(difluoromethyl)-1-(6-halo-2-substituted-benzothiazol-5-yl)-3-methyl-1H-1,2,4-triazol-5(4H)-ones 2a-z were designed and synthesized via the ring-closure of two ortho-substituents. The in vitro bioassay results indicated that the 26 newly synthesized compounds exhibited good PPO inhibition effects with K(i) values ranging from 0.06 to 17.79 μM. Compound 2e, ethyl 2-{[5-(4-(difluoromethyl)-3-methyl-5-oxo-4,5-dihydro-1H-1,2,4-triazol-1-yl)-6-fluorobenzo-thiazol-2-yl]thio}acetate, was the most potent inhibitor with K(i) value of 0...
June 1, 2013: Bioorganic & Medicinal Chemistry
https://www.readbyqxmd.com/read/21517076/design-and-syntheses-of-novel-n-benzothiazol-5-yl-4-5-6-7-tetrahydro-1h-isoindole-1-3-2h-dione-and-n-benzothiazol-5-yl-isoindoline-1-3-dione-as-potent-protoporphyrinogen-oxidase-inhibitors
#14
Li-Li Jiang, Yang Zuo, Zhi-Fang Wang, Yin Tan, Qiong-You Wu, Zhen Xi, Guang-Fu Yang
Discovery of protoporphyrinogen oxidase (PPO, EC 1.3.3.4) inhibitors has been one of the hottest research areas in the field of herbicide development for many years. As a continuation of our research work on the development of new PPO-inhibiting herbicides, a series of novel N-(benzothiazol-5-yl)-4,5,6,7-tetrahydro-1H-isoindole-1,3(2H)-diones (1a-p) and N-(benzothiazol-5-yl)isoindoline-1,3-diones (2a-h) were designed and synthesized according to the ring-closing strategy of two ortho-substituents. The bioassay results indicated that some newly synthesized compounds exhibited higher PPO inhibition activity than the control of sulfentrazone...
June 8, 2011: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/20801483/electroanalytical-studies-of-sulfentrazone-in-protic-medium-its-degradation-by-the-electro-fenton-process-and-toxicity-assessment-using-ss-dna
#15
Augusto C de A Lima, Acácia M dos S Melo, Edjane Vieira Pires, Roberta Costa dos Santos Ferreira, Antônio E G Sant'Ana, Marília O F Goulart, Fabiane C de Abreu
Sulfentrazone is an herbicide used as a pre-plant incorporated or pre-emergence treatment. The electrochemical oxidation of sulfentrazone was studied, by cyclic, differential and square-wave voltammetry on unmodified and on glassy carbon nanotube-modified electrodes, and by controlled-potential coulometry and electrolysis. The voltammograms of sulfentrazone showed a main irreversible diffusion-controlled pH-dependent oxidation peak. The in situ DNA-damaging capacity of sulfentrazone was also investigated, employing double stranded ds-DNA-modified glassy carbon electrode, without evidence of interaction...
November 2010: Chemosphere
https://www.readbyqxmd.com/read/18943113/protoporphyrinogen-oxidase-inhibitor-herbicide-effects-on-pythium-root-rot-of-sugarcane-pythium-species-and-the-soil-microbial-community
#16
J H Daugrois, J W Hoy, J L Griffin
ABSTRACT The effects of three protoporphyrinogen oxidase inhibitor herbicides, azafenidin, flumioxazin, and sulfentrazone, on Pythium root rot of sugarcane and the soil microbial community were evaluated in greenhouse experiments. Herbicides were applied as foliar and soil treatments. There were no consistent effects on plant growth or disease parameters. However, some herbicide treatments affected the relative frequency of isolation of Pythium spp. from roots and reduced colonization by the pathogenic species Pythium arrhenomanes...
March 2005: Phytopathology
https://www.readbyqxmd.com/read/18781765/herbicide-solubilization-in-micelle-clay-composites-as-a-basis-for-controlled-release-sulfentrazone-and-metolachlor-formulations
#17
Dana Ziv, Yael G Mishael
Sulfentrazone and metolachlor have been detected in groundwater due to extensive leaching. To reduce herbicide leaching and increase weed control, we have developed, designed, and tested controlled release formulations (CRFs) for both herbicides based on their solubilizion in cationic micelles and adsorption of the mixed micelles (surfactant and herbicide) on a clay mineral, montmorillonite. A better understanding of solubilizing anionic (sulfentrazone) and nonionic (metolachlor) organic molecules in cationic micelles was reached...
October 8, 2008: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/18298068/syntheses-and-herbicidal-activities-of-novel-triazolinone-derivatives
#18
Yan-Ping Luo, Li-Li Jiang, Guo-Dong Wang, Qiong Chen, Guang-Fu Yang
Protoporphyrinogen oxidase (Protox, EC 1.3.3.4) has been identified as one of the most important action targets of herbicides. To search for novel Protox inhibitors, a series of title compounds 1, 2, and 3 were designed and synthesized by introducing three types of pharmacophores, cyclic imide, phenylurea, and ( E)-methyl 2-methoxyimino-2- o-tolylacetate, into the scaffold of triazolinone. The bioassay results indicated that the resulting cyclic imide-type triazolinones 1 displayed much better herbicidal activities than phenylurea-type triazolinones 2...
March 26, 2008: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/17915281/a-clay-vesicle-system-for-water-purification-from-organic-pollutants
#19
Tomas Undabeytia, Shlomo Nir, Trinidad Sánchez-Verdejo, Jaime Villaverde, Celia Maqueda, Esmeralda Morillo
Vesicle-clay complexes in which positively charged vesicles composed of didodecyldimethylammonium bromide (DDAB) were adsorbed on montmorillonite removed efficiently anionic (sulfentrazone, imazaquin) and neutral (alachlor, atrazine) pollutants from water. These complexes (0.5% w:w) removed 92-100% of sulfentrazone, imazaquin and alachlor and 60% of atrazine from a solution containing 10mg/L of it. A synergistic effect on the adsorption of atrazine was observed when all pollutants were present simultaneously (30 mg/L each), its percentage of removal being 85...
February 2008: Water Research
https://www.readbyqxmd.com/read/17659344/evaluation-of-neurodevelopmental-effects-on-rats-exposed-prenatally-to-sulfentrazone
#20
Vera L S S de Castro, Camila R Destefani, Carlos Diniz, Paola Poli
Although some studies have pointed to embryo/fetal toxicity at treatment levels that were not maternally toxic, knowledge about the potential toxic effects of the herbicide sulfentrazone is still limited. Since the results of these studies have raised some concern, the present work studied the effects of sulfentrazone maternal exposure on the physical and neurobehavioral endpoints in the development of rat pups. To accomplish that, the effects of the herbicide sulfentrazone (25 and 50mg/kg) were examined at two different developmental stages in rats: during the first 6 days of gestation, or in the organogenesis period (6-15 days)...
November 2007: Neurotoxicology
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