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盖草能、草铵膦和不同草甘膦制剂防除咖啡园杂草的效果

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世界热带农业信息 1992年第6期 8-12页

作者： J Mburu njoroge 范志伟

本试验对几种除草剂和除草剂制剂防除肯尼亚咖啡园杂草的效果进行了评价。这些除草剂包括草铵膦(glufosinate ammonium,Basta20％乳油)、盖草能(haloxyfop ethoxyethyl,Gallant12.5％乳油)、90克/升草甘膦(Kamata)、180克/升草甘膦(Sti... 详细信息

本试验对几种除草剂和除草剂制剂防除肯尼亚咖啡园杂草的效果进行了评价。这些除草剂包括草铵膦(glufosinate ammonium,Basta20％乳油)、盖草能(haloxyfop ethoxyethyl,Gallant12.5％乳油)、90克/升草甘膦(Kamata)、180克/升草甘膦(Sting)、100克/升草甘膦+280克/升西玛津(Ricochet)。盖草能是优良的禾本科杂草除草剂,用量为3—4升/公顷;草铵膦、Kamata、Sting和Ricochet是广谱性除草剂,用量分别为2—3升/公顷、3—6升/公顷、1.5—3升/公顷和5—7升/公顷。

关键词：草铵膦盖草能杂草防除除草效果西玛津防除措施草甘磷施用剂量银胶菊 ammonium

肯尼亚小粒种咖啡间种的观察结果及进一步的研究方向

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世界热带农业信息 1993年第6期 26-30,35页

作者： J.M.njoroge 莫治雄

在肯尼亚,咖啡出口收入约占国家出口总收入的30％,在创汇行业中居第三位,仅次于旅游业和茶业。由于当前自由市场的形势对咖啡业产生了很大影响,所以本文对当前的咖啡生产和将来的发展趋势进行了讨论,提出了克服这些影响应该采用的方法,... 详细信息

在肯尼亚,咖啡出口收入约占国家出口总收入的30％,在创汇行业中居第三位,仅次于旅游业和茶业。由于当前自由市场的形势对咖啡业产生了很大影响,所以本文对当前的咖啡生产和将来的发展趋势进行了讨论,提出了克服这些影响应该采用的方法,特别是间种策略。对澳洲坚果/咖啡间种方式、粮食作物/咖啡间种方式和绿叶山蚂蝗覆盖方式进行了讨论。指出了咖啡与这些作物间种的可行性,特别是在咖啡定植前两年和咖啡树更新期,与一年生粮食作物间种的可行性。本文也提出了咖啡间种进一步研究的方向。

关键词：间种咖啡树小粒种咖啡绿叶山蚂蝗澳洲坚果出口收入更新期覆盖方式紫狼尾草种植密度

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肯尼亚咖啡园不同除草方法的比较

世界热带农业信息 1992年第1期 22-28页

作者： J. M. njoroge 范志伟

为找到最适合于肯尼亚潮湿地区的除草方法,比较了各种化学和机械除草方法。试验于1985年在科鲁咖啡研究分站进行。处理对净咖啡产量有显著影响,而对A级豆的百分率没有产生影响。草甘膦(有效含量为36％)除草效果最好(防效为97.5％),但成... 详细信息

为找到最适合于肯尼亚潮湿地区的除草方法,比较了各种化学和机械除草方法。试验于1985年在科鲁咖啡研究分站进行。处理对净咖啡产量有显著影响,而对A级豆的百分率没有产生影响。草甘膦(有效含量为36％)除草效果最好(防效为97.5％),但成本很高。百草枯(有效成份20％,水剂)+利谷隆(50％可温性粉剂)重复使用,除草效果好(95％),纯利高(4256肯尼亚镑/公顷·年),但对禾本科杂草和莎草低效。百草枯+利谷隆处理具有最高边际报酬率,其次是百草枯单用、百草枯+耙草/砍草和砍草+耙草等处理。本文推荐一种行之有效的杂草综合防除方法。在不除草的咖啡园,杂草使净咖啡产量降低52％以上。

关键词：杂草防除除草效果防除方法利谷隆咖啡树边际报酬草甘磷杂草种群莎草属土壤处理

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咖啡园种植覆盖作物的效应

世界热带农业信息 1985年第2期 33-35页

作者： J.M.njoroge 张业纶

在咖啡园种植覆盖作物可抑制杂草,还有利于保持水土、调节土壤温度并能增加土壤肥力。用绿叶山马蝗和银叶山马蝗作咖啡园的长期覆盖并适时割叶,不仅能促其再生,也为牲畜提供了饲料。本试验旨在测定覆盖对杂草的抑制程度,估算在咖啡园间... 详细信息

在咖啡园种植覆盖作物可抑制杂草,还有利于保持水土、调节土壤温度并能增加土壤肥力。用绿叶山马蝗和银叶山马蝗作咖啡园的长期覆盖并适时割叶,不仅能促其再生,也为牲畜提供了饲料。本试验旨在测定覆盖对杂草的抑制程度,估算在咖啡园间种绿叶山马蝗作覆盖

关键词：咖啡产量覆盖处理山马蝗咖啡豆覆盖作物

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氮素用量和施用次数对咖啡产量和质量的影响

世界热带农业信息 1989年第6期 14-17页

作者： J.Mburu njoroge 魏定耀

在肯尼亚东部的马林尼(Mariene)进行了一项为期10年的关于氮素用量和施用次数对咖啡产量和质量影响的研究。试验结果表明,施肥对净咖啡豆有正效应。尽管在氮素施用量、施用次数及其相互作用方面,没有取得一致的显著差异,但将每公顷50公... 详细信息

在肯尼亚东部的马林尼(Mariene)进行了一项为期10年的关于氮素用量和施用次数对咖啡产量和质量影响的研究。试验结果表明,施肥对净咖啡豆有正效应。尽管在氮素施用量、施用次数及其相互作用方面,没有取得一致的显著差异,但将每公顷50公斤的氮素用量在一年中分4次(3月、5月、10月和12月)施用的处理效果最佳。多次少量施氮的肥效较高,多量多次施氮的肥效有所降低,而施氯量很高,施用次数多的处理效应也比施用次数少的高。试验还表明,施肥能提高大豆粒(A 级豆粒)的百分率。一年肥料分4次施用的处理,其 A 级豆粒率也高。

关键词：氮素用量咖啡豆施肥量产量咖啡树显著差异次数施用量豆粒氮肥用量

Bioefcacy and durability of Olyset® Plus, a permethrin and piperonyl butoxide-treated insecticidal net in a 3-year long trial in Kenya

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Infectious Diseases of Poverty 2021年第6期10卷 16-26页

作者： Paul M.Gichuki Luna Kamau Kiambo Njagi Solomon Karoki njoroge Muigai Damaris Matoke‑Muhia Nabie Bayoh Evan Mathenge Rajpal S.Yadav Eastern&Southern Africa Centre of International Parasite Control Kenya Medical Research InstituteNairobiKenya School of Health Sciences Meru University of Science and TechnologyMeruKenya Centre for Biotechnol‑ogy Research and Development Kenya Medical Research InstituteNairobiKenya Division of National Malaria Programme Ministry of HealthNairobiKenya Department of Health Kirinyaga CountyKirinyagaKenya Centre for Global Health Research Kenya Medical Research InstituteKisumuKenya Centers for Disease Control and Prevention KisumuKenya Department of Control of Neglected Tropical Diseases World Health OrganizationGenevaSwitzerland

Background:Long-lasting insecticide nets(LLINs)are a core malaria *** should retain efficacy against mosquito vectors for a minimum of three *** and durability of Olyset®Plus,a permethrin and piperonyl butoxide(PBO)treated LLIN,w.s evaluated versus permethrin treated Olyset®*** the absence of w.O guidelines of how.to evaluate PBO nets,and considering the manufacturer’s product claim,Olyset®Plus w.s evaluated as a pyrethroid ***:This w.s a household randomized controlled trial in a malaria endemic rice cultivation zone of Kirinyaga County,Kenya betw.en 2014 and *** bioassays and tunnel tests w.re done against Anopheles gambiae *** chemical content,fabric integrity and LLIN survivorship w.re *** betw.en nets w.re tested for signifcance using the Chi-square *** binomial distribution w.th 95%confdence intervals(95%CI)w.s used for *** w.O efcacy criteria used w.re≥95%knockdow. and/or≥80%mortality rate in cone bioassays and≥80%mortality and/or≥90%blood-feeding inhibition in tunnel ***:At 36 months,Olyset®Plus lost 52%permethrin and 87%PBO content;Olyset®Net lost 24%*** 80%of Olyset®Plus and Olyset®Net passed the w.O efcacy criteria for LLINs up to 18 and 12 months,respec‑*** month 36,91.2%Olyset®Plus and 86.4%Olyset®Net survived,w.ile 72%and 63%developed at least one *** proportionate Hole Index(pHI)values representing nets in good,serviceable and torn condition w.re 49.6%,27.1%and 23.2%,respectively for Olyset®Plus,and 44.9%,32.8%and 22.2%,respectively for Olyset®Net but w.re not signifcantly ***:Olyset®Plus retained efcacy above or close to the w.O efcacy criteria for about 2 years than Olyset®Net(1–1.5 years).Both nets did not meet the 3-year w.O efcacy criteria,and show.d little attrition,comparable physical durability and survivorship,w.th 50%of Olyset®Plus having good and serviceable condition after 3 *** community educat

关键词： Anopheles gambiae Bioefficacy Durability Kenya Long-lasting insecticidal net Olyset®Net Olyset®Plus Permethrin Piperonyl butoxide

文化混搭对群体心理融合的影响:经验开放性的调节作用

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辽宁师范大学学报（社会科学版） 2020年第4期43卷 50-58页

作者：赵玉芳包燕肖子伦李骐 w.llie njoroge 梁芳美西南大学西南民族教育与心理研究中心重庆400715 西南大学心理学部重庆400715 楚雄医药高等专科学校基础医学系云南楚雄675005

心理融合是积极群际关系的表征,是构建和谐社会不可或缺的重要前提。基于群际接触理论,通过两个实验考察了文化混搭对心理融合的影响及其调节因素。实验采用4×2两因素组间设计,先测量被试经验开放性,然后操纵文化混搭,并使用双向社会... 详细信息

心理融合是积极群际关系的表征,是构建和谐社会不可或缺的重要前提。基于群际接触理论,通过两个实验考察了文化混搭对心理融合的影响及其调节因素。实验采用4×2两因素组间设计,先测量被试经验开放性,然后操纵文化混搭,并使用双向社会距离量表(实验一、实验二)和街道距离投射测验(实验二)测量外显和内隐心理融合水平。结果表明,文化混搭不仅能促进外显心理融合也能提升内隐心理融合,经验开放性在其中起调节作用——文化混搭对高经验开放者心理融合有促进作用,对低经验开放者则无显著影响。该结果不仅丰富了心理融合研究,拓展了群际接触理论,也为实践中群体关系管理提供了一定的理论指导。

关键词：心理融合文化混搭经验开放性群际接触理论

Isolation and Characterization of SARS-CoV-2 in Kenya

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American Journal of Molecular Biology 2024年第2期14卷 66-83页

作者： Albina Makio Robinson Mugasiali Irekw. Matthew.Mutinda Munyao Caroline w.ngui njoroge Peter Kipkemboi Rotich Tonny Teya Nyandw.ro Joanne Jepkemei Yego Anne w.njiru Mw.ngi James Hungo Kimotho Ronald Tanui Vincent Rutto Samson Muuo Nzou Center for Traditional Medicine and Drug Research Kenya Medical Research Institute Nairobi Kenya Center for Microbiology Research Kenya Medical Research Institute Nairobi Kenya Production Department Kenya Medical Research Institute Nairobi Kenya Department of Biochemistry and Microbiology Rhodes University Grahamstown South Africa Center for Virus Research Kenya Medical Research Institute Nairobi Kenya

The discovery of Severe Acute Respiratory Syndrome-Coronavirus-2 (SARS-CoV-2) in w.han, Hubei province, China, in December 2019 raised global health w.rnings. Quickly, in 2020, the virus crossed borders and infected individuals across the w.rld, evolving into the COVID-19 pandemic. Notably, early signs of the virus’s existence w.re observed in various countries before the initial outbreak in w.han. As of 12th of April, the respiratory disease had infected over 762 million people w.rldw.de, w.th over 6.8 million deaths recorded. This has led scientists to focus their efforts on understanding the virus to develop effective means to diagnose, treat, prevent, and control this pandemic. One of the areas of focus is the isolation of this virus, w.ich plays a crucial role in understanding the viral dynamics in the laboratory. In this study, w. report the isolation and detection of locally circulating SARS-CoV-2 in Kenya. The isolates w.re cultured on Vero Cercopithecus cell line (CCL-81) cells, RNA extraction w.s conducted from the supernatants, and reverse transcriptase-polymerase chain reaction (RT-PCR). Genome sequencing w.s done to profile the strains phylogenetically and identify novel and previously reported mutations. Vero CCL-81 cells w.re able to support the grow.h of SARS-CoV-2 in vitro, and mutations w.re detected from the tw. isolates sequenced (001 and 002). Genome sequencing revealed the circulation of tw. isolates that share a close relationship w.th the Benin isolate w.th the D614G common mutation identified along the S protein. These virus isolates w.ll be expanded and made available to the Kenya Ministry of Health and other research institutions to advance SARS-CoV-2 research in Kenya and the region.

关键词： SARS-CoV-2 COVID-19 w.ole Genome Sequencing Phylogenetic Analysis Nucleotide Substitutions Amino Acid Changes

Evaluation of the TbgI_(2) and TbgI_(17) Tandem Repeat Antigens as Potential Antigens for the Diagnosis of Trypanosoma brucei rhodesiense

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Open Journal of Clinical Diagnostics 2019年第4期9卷 152-163页

作者： Vanessa Irumva Rebecca w.ihenya Anne w.njiru Mw.ngi Peter Kipkemboi Satoshi Kaneko Tonny Teya Joanne Jepkemei Caroline njoroge Joseph w.mbugu Gitari Matthew.Mutinda Munyao Robinson MIrekw. Murima Ng’ang’a Samson Muuo Nzou Department of Molecular Biology and Biotechnology Pan-African University Institute of Basic SciencesTechnology and InnovationNairobiKenya Zoology Department Jomo Kenyatta University for Agriculture and TechnologyNairobiKenya Nagasaki University Institute of Tropical Medicine-Kenya Medical Research Institute Project NairobiKenya Production Department-Kenya Medical Research Institute NairobiKenya Institute of Tropical Medicine Eco-Epidemiology DepartmentNagasaki UniversityNagasakiJapan Division of Vector Borne and Neglected Tropical Diseases.Ministry of Health NairobiKenya Centre for Microbiology Research Kenya Medical Research InstituteBusiaKenya

Human African trypanosomiasis (HAT) affects up to half a million people every year in sub-Saharan Africa. Interruption of transmission of the disease by early diagnosis and treatment is core to the control and eventual elimination of HAT. The routine diagnostic method for HAT is light microscopy of blood samples. The present study sought to evaluate the potential of TbgI2 and TbgI17 tandem repeat antigens as candidates for the diagnosis of Trypanosoma brucei rhodesiense. The expressed proteins w.re purified and the antigenic reactivity evaluation w.s done using multiplex assay using sera obtained from HAT patients. Receiver operating characteristic analysis show.d that recombinant antigen, TbgI2 had high sensitivity for sera from patients infected w.th T. b. rhodesiense w.th the area under the curve being 0.577 and a sensitivity of 0.641 and specificity 0.650. The results suggest that TbgI2 is a potential biomarker for T. b. rhodesiense HAT serodiagnostic tests.

关键词： Human African Trypanosomiasis TbgI2 TbgI17 Antigens Diagnosis Trypanosoma brucei rhodesiense