检索结果-南通市图书馆

acaricidal activity of Derris floribunda essential oil and its main constituent

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2017年第9期7卷 791-796页

作者： Ana Claudia Fernandes Amaral Aline de SRamos Marcia Reis Pena Jose Luiz Pinto Ferreira Jean Michel SMenezes Geraldo JNVasconcelos Neliton Marques da Silva Jefferson Rocha de Andrade Silva Lab de Plantas Medicinais e Derivados Depto de Quimica de Produtos NaturaisFarmanguinhosFundacao Oswaldo CruzRio de JaneiroRJBrazil Lab de Entomologia e Acarologia Agricola Faculdade de Ciencias AgrariasUniversidade Federal do AmazonasManausAMBrazil Lab de Cromatografia Depto de QuímicaUniversidade Federal do AmazonasManausAMBrazil 4Instituto de Ciencias Exatas e TecnologiaUniversidade Federal do AmazonasItacoatiaraAMBrazil

Objective: To evaluate the acaricidal activity of the essential oil obtained from roots of Derris floribunda(D. floribunda)(Miq.) Benth, and its main constituent nerolidol against the Mexican mite Tetranychus mexicanus(T. mexicanus)(Mc Gregor).Methods: The essential oil from the roots of D. floribunda collected in the Amazon region(Brazil) was obtained by hydrodistillation. Its chemical composition was determined by GC–MS analysis. The acaricidal activities of this essential oil and nerolidol,were evaluated by recording the number of dead females(mortality) and eggs(fertility).Results: The essential oil showed sesquiterpenes as major volatile components. Nerolidol, the main component, represented 68.5% of the total composition of the essential oil. D. floribunda essential oil and nerolidol showed acaricidal activity, with LC_(50) of9.61 mg/m L air and 9.2 mg/m L air, respectively, over a 72 h period. In addition, both the essential oil and nerolidol significantly reduced the fecundity of T. ***: Due to the economic importance of T. mexicanus and the lack of new pesticides, our data are very promising in the search for efficient and safer acaricidal products. Furthermore, this is the first report about the chemical composition and bioactivity of the essential oil of the Amazon plant species D. floribunda.

关键词： acaricidal activity Essential oil Nerolidol Organic agriculture Sesquiterpenes Timb

Synthesis,Structure and acaricidal activity of Tricyclohexyltin Benzoate

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Chinese Journal of Structural Chemistry 2014年第9期33卷 1287-1292页

作者：张志坚邝代治张复兴朱小明庚江喜蒋伍玖 Department of Life Sciences Hengyang Normal University Department of Chemistry and Material Science Hengyang Normal University

Tricyclohexyltin 4-amino-3-methyl-benzoate （1） and tricyclohexyltin 3,4-dime- thoxybenzoate （2） were synthesized and their crystal structures were determined by X-ray diffraction. Compound 1 belongs to the monoclinic system, space group P21/c with a = 14.0554（15）, b = 11.6947（13）, c = 16.2720（17）A, Z = 4, V= 2565.7（5） A3, Dc = 1.341 ***-3,μ（MoKa） = 1.016 mm-1, F（000） = 1080, R = 0.0833 and wR = 0.2964. Compound 2 is of monoclinic system, space group C2/c with a = 17.8712（6）, b = 8.4433（3）, c = 35.5783（13） A, Z = 8, V= 5366.8（3） A3, Dc = 1.360 ***-3,/1（MoKa） = 0.980 mm-1, F（000） = 2288, R = 0.0549, wR = 0.1279. In compounds 1 and 2, the central Sn atom is coordinated in a tetradentate manner to assume a distorted tetrahedral configuration. Preliminary biological tests showed that these two compounds have strong acaricidal activity.

关键词： organotin carboxylates synthesis crystal structure acaricidal activity

The thiazoylmethoxy modification on pyrazole oximes: Synthesis and insecticidal biological evaluation beyond acaricidal activity

在线全文

学校读者我要写书评

暂无评论

Chinese Chemical Letters 2014年第7期25卷 1014-1016页

作者： Hong Dai Yan-Shuang Xiao Zhong Li Xiao-Yong Xu Xu-Hong Qian Shanghai Key Laboratory of Chemical Biology School of PharmacyEast China University of Science and Technology College of Chemistry and Chemical Engineering Nantong University

A series of new pyrazole oximes bearing substituted thiazole ring were designed and prepared. The structures of the title compounds were identified by spectral analyses, The results of primary bioassay indicated that some targeted compounds exhibited promising insecticidal activity besides acaricidal activity, particularly; compounds 8c and 8d were more potent against Tetranychus cinnabarinus and Plutella xylostella than other analogues.

关键词： Pyrazole oxime Substituted thiazole acaricidal activity Insecticidal activity

Green synthesis,characterization,acaricidal,larvacidal,and repellent activities of copper nanoparticles of Astragalus sinicus against Hyalomma anatolicum

在线全文

学校读者我要写书评

暂无评论

Asian Pacific Journal of Tropical Biomedicine 2023年第6期13卷 250-257页

作者： Hattan S.Gattan Bassam M.Al-Ahmadi Abdullah F.Shater Qais A.H.Majeed Maha S.Alazemi Abdullah D Alanazi Department of Medical Laboratory Sciences Faculty of Applied Medical SciencesKing Abdulaziz UniversityJeddahSaudi Arabia Special Infectious Agents UnitKing Fahad Medical Research CenterJeddahSaudi Arabia Department of Biology Faculty of ScienceTaibah UniversitySaudi Arabia Department of Medical Laboratory Technology Faculty of Applied Medical SciencesUniversity of TabukTabuk 71491Saudi Arabia Department of Science College of Basic EducationPAAETPost code 23167AridiyaKuwait Department of Biological Sciences Faculty of Science and HumanitiesShaqra UniversityP.O.Box 1040Ad-Dawadimi 11911Saudi Arabia

Objective:To green synthesize and characterize copper nanoparticles(Cu NPs)using Astragalus sinicus,as well as evaluate the acaricidal,larvacidal,and repellent activities of Cu NPs against Hyalomma anatolicum(***),one of the most prevalent ticks infesting cattle in Saudi ***:Cu NPs were green synthesized by adding the Astragalus sinicus extract to a copper sulfate *** acaricidal,larvicidal,and repellent activities of Cu NPs against *** were assessed via the adult immersion test,the larval packet test,and the vertical movement behavior of tick larvae,*** effects of Cu NPs on acetylcholinesterase as well as oxidative enzyme activities were ***:The green synthesized Cu NPs displayed a spherical form with a size range of 15-75 *** exposure of adult *** to different concentrations of Cu NPs,the viability rate of adult *** and the mean number,weight,and hatchability of eggs were noticeably reduced,in comparison to the control group(Pactivity of Cu NPs was observed at 50,100,and 200μg/m L with complete repellent activity after 60,120,and 180 min of exposure,*** NPs,mainly at 1/2 LC_(50)and LC_(50)concentrations,markedly suppressed the acetylcholinesterase activity of the larval stage of ***(Pacaricidal,larvicidal,and repellent activities against adults and larvae of ***,further studies must be performed to clarify the precise mechanisms and the efficacy of Cu NPs in practical use.

关键词： Insecticide Tick Pesticide Astragalus sinicus Nanomedicine Hyalomma anatolicum acaricidal activity Larvacidal activity

Synthesis,insecticidal and acaricidal activities of novel 2-arylpyrroles

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2013年第1期56卷 117-123页

作者： LIU AiPing TANG Ming YU ShuYing LIU XingPing WANG XiaoGuang PEI Hui WU DaoXin HU Li OU XiaoMing HUANG MingZhi National Engineering Research Center for Agrochemicals Hunan Research Institute of Chemical Industry Hunan Province Key Laboratory for Agrochemicals School of Chemistry and Biological Engineering Changsha University of Science and Technology

To search for novel 2-arylpyrroles with unique biological activities,a series of novel 2-arylpyrrole derivatives were designed and synthesized,and their structures were characterized by 1 H and 13 C NMR spectroscopy,MS spectrometry,and elemental *** insecticidal activities against Lepidopteran pests (*** separata) and acaricidal activities against mites (*** urticae) were *** results of bioassays indicate that some of these title compounds exhibited excellent insecticidal and acaricidal *** example,4-bromo-1-((chloromethoxy)methyl)-2-(4-chloro phenyl)-5-(trifluoromethyl)pyrrole-3-carbonitrile (6a),4-bromo-2-(4-chlorophenyl)-1-((2-fluoroethoxy)-methyl)-5-(trifluoromethyl)pyrrole-3-carbonitrile (6d) showed insecticidal activity against Mythimna separata and 4-bromo-2-(4-chlorophenyl)1-((isopropoxymethoxy)methyl)-5-(trifluoro methyl)pyrrole-3-carbonitrile (7d) showed acaricidal activity against Tetranychus *** were more effective than Chlorfenapyr,which has been the only commercialized member of a new class of chemicals of 2-arylpyrroles.

关键词： 2-arylpyrroles Chlorfenapyr synthesis insecticidal activity acaricidal activity

Synthesis of Trihydrocarbyltin Chloride Containing Silicon and Crystal Structure of (p-Cl-C_6H_4Me_2SiCH_2)_3SnCl

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2002年第3期18卷 277-279页

作者： ZHONG Gui yun LIU Hua XIE Qing lan Institute of Elemento organic Chemistry Nankai UniversityTianjin 300071P.R.China

A series of trihydrocarbyltin chlorides containing silicon was synthesized. The acaricidal activity was determined and the structure activity relationship was tried to be found out with the hydrophobic parameter.

关键词： Organotin and organosilicon acaricidal activity Structure activity relationship

Bioactivity and Kinetic Study of <i>Jatropha curcas</i>Essential Oil Extraction Using Supercritical CO<sub>2</sub>

在线全文

学校读者我要写书评

暂无评论

American Journal of Analytical Chemistry 2020年第8期11卷 322-334页

作者： Laura Catalina Soto-Armenta Julio C. Sacramento Rivero Claudia Araceli Ruiz-Mercado Azucena González-Coloma José Antonio Rocha-Uribe Universidad del Valle de México Mérida Yucatán México Facultad de Ingeniería Química Universidad Autónoma de Yucatán Yucatán México Instituto de Ciencias Agrarias CSIC Madrid Espa&ntilde a Colegio de Bachilleres de Chiapas Tuxtla Gtz. Chiapas México

This study reports the extraction of Jatropha curcas leaves using supercritical CO2. Experiments were performed varying the pressure (13 and 20 MPa) and the temperature (50°C and 60°C). The model of Sovová for supercritical fluid extraction was fitted to the experimental kinetic extraction curves. Two cell sizes were used and scale up equations compared. GC analysis showed phytol, carvacrol, and hexahydrofarnesyl acetone as major compounds in all the experiments. A maximum yield of 0.95% dry-weight basis was obtained. It was observed a maximum yield (0.95% dry-weight basis) extract obtained at 20 MPa and 50°C. The results indicated that the mass yield increased with the increase of pressure. The bioassays showed that the extract of J. curcas possessed toxicity against Hyalomma lusitanicum.

关键词： Jatropha curcas Leaves Supercritical Fluid Scale-Up acaricidal activity