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Insecticidal Activity and Physicochemical Characterization of Nanoparticles from Foliar Extract of Capsicum chinense

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Journal of Renewable Materials 2023年第11期11卷 3933-3943页

作者： Arnoldo E.alfaro-corres Daniel Gonzalez-Mendoza Esau Ruiz-Sanchez Carlos Ail-Catzin Benjamin Valdez-Salas Federico Gutierrez-Miceli Arturo Reyes-Ramirez Jacques Fils Pierre Division of Postgraduate Studies and Research Tecnologico Nacional de MéxicoCampus ConkalConkalYucatán97345Mexico Institute of Agricultural Sciences Universidad Autonoma de Baja CaliforniaEjido Nuevo LeonMexicaliBaja California21705Mexico Instituto de Ingeniería Universidad Autónoma de Baja CaliforniaMexicaliBaja California21100Mexico Division of Postgraduate Studies and Research Tecnologico Nacional de MexicoCampus Tuxtla GutierrezTuxtla GutierrezChiapas29050Mexico

This work was carried out to evaluate the insecticidal effect of mono,bi and trimetallic nanoparticles(NPs)from leaf extract of habanero pepper(Capsicum chinense Jacq.)on the red flour beetle(Tribolium castaneum herbst.)and cotton mealybug(Phenacoccus solenopsis Tinsley).The results showed that Cu NPs,Cu/Mn NPs and Zn/Cu NPs had high insecticidal effect against ***(63%-80% mortality after 96 h).The Cu NPs and Zn/Cu NPs showed also insecticidal effect against ***,but to a lesser extent(20%–28% after 96 h).With regards to the physicochemical characterization,Cu NPs had a zeta potential of 21.1 mV,whereas Cu/Mn NPs and Zn/Cu NPs exhibited zeta potentials of 200 *** polydispersity index(PDI)values for Cu NPs,Cu/Mn NPs,and Zn/Cu NPs were 10.1,29.16,and 14.34,*** TF-IR spectra of the NPs varied from 600 to 4000 cm−*** EDX weight percentages showed the presence of Cu(0.29%–2.4%),Mn(1.4%),and Zn(2.6%)in Cu/Mn NPs and Zn/Cu NPs,respectively.

关键词： Phytonanoparticles botanical insecticide pest control agronanotechnology

中国蚕豆主产区土壤有机碳储量特征及其环境因子分析

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江西师范大学学报（自然科学版） 2024年第2期48卷 175-182页

作者：吴海娟许林英魏亮刘琼张凯璐葛体达王聪广西大学林学院广西森林生态与保育重点实验室亚热带农业生物资源保护与利用国家重点实验室广西南宁530004 宁波大学植物病毒学研究所农产品质量安全危害因子与风险防控国家重点实验室浙江宁波315211 慈溪市农业技术推广中心浙江慈溪315300 中国科学院亚热带农业生态研究所亚热带农业生态过程重点实验室湖南长沙410125

土壤是重要的碳储存库,增加农业土壤有机碳储量是缓解大气CO_(2)浓度增加和应对全球气候变化的有效手段.该文以中国西北地区、华北地区和华东地区的蚕豆种植区域为研究对象,结合气候、土壤性质等影响因素,探究在区域尺度下表层土壤有机... 详细信息

土壤是重要的碳储存库,增加农业土壤有机碳储量是缓解大气CO_(2)浓度增加和应对全球气候变化的有效手段.该文以中国西北地区、华北地区和华东地区的蚕豆种植区域为研究对象,结合气候、土壤性质等影响因素,探究在区域尺度下表层土壤有机碳储量差异及其环境因子的影响机制.研究结果表明:研究区土壤有机碳储量共同受到气候因子、生物因子和化学因子的综合作用,其中气候因子和化学因子的交互作用对碳储量的影响最显著.在气候因子中经度、纬度、海拔对蚕豆产区土壤有机碳储量影响较为显著,体现在3个蚕豆产区的土壤有机碳储量中贡献最大的环境因子是纬度,且土壤有机碳储量呈现随经度的增加而减少,随海拔的增高而增高的趋势.在化学因子中DOC、TN、pH值对蚕豆产区土壤有机碳储量影响较为显著,在生物因子中影响较为显著的是土壤q_(CO_(2)).分区域而言,西北地区的土壤有机碳储量主要与年平均降水量呈正相关关系,华北地区和西北地区的土壤有机碳储量均与年平均气温呈负相关关系,在华东地区对土壤有机碳储量的影响相对显著的化学因子是可溶性有机碳(DOC).

关键词：土壤有机碳储量蚕豆环境因子区域尺度

Elucidating regulatory processes of intense physical activity by multi-omics analysis

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Military Medical Research 2024年第4期11卷 479-499页

作者： ernesto S.Nakayasu Marina A.Gritsenko Young-Mo Kim Jennifer E.Kyle Kelly G.Stratton Carrie D.Nicora Nathalie Munoz Kathleen M.Navarro Daniel Claborne Yuqian Gao Karl K.Weitz Vanessa L.paurus Kent J.Bloodsworth Kelsey A.Allen Lisa M.Bramer Fernando Montes Kathleen A.Clark Grant Tietje Justin Teeguarden Kristin E.Burnum-Johnson Biological Sciences Division Pacific Northwest National LaboratoryRichlandWA 99352USA Environmental and Molecular Sciences Division Pacific Northwest National LaboratoryRichlandWA 99352USA Centers for Disease Control and Prevention National Institute for Occupational Safety and HealthWestern States DivisionDenverCO 80204USA Computational Analytics Division Pacific Northwest National LaboratoryRichlandWA 99352USA National Security Directorate Pacific Northwest National LaboratoryRichlandWA 99352USA Los Angeles County Fire Department Los AngelesCA 90063USA Centers for Disease Control and Prevention National Institute for Occupational Safety and HealthRespiratory Health DivisionMorgantownWV 26505USA Environmental and Molecular Toxicology Oregon State UniversityCorvallisOR 97331USA

Background:Physiological and biochemical processes across tissues of the body are regulated in response to the high demands of intense physical activity in several occupations,such as firefighting,law enforcement,military,and sports.A better understanding of such processes can ultimately help improve human performance and prevent illnesses in the work ***:To study regulatory processes in intense physical activity simulating real-life conditions,we performed a multi-omics analysis of 3 biofluids(blood plasma,urine,and saliva)collected from 11 wildland firefighters before and after a 45 min,intense exercise *** profiles ***-exercise were compared by Student’s t-test followed by pathway analysis and comparison between the different omics ***:Our multi-omics analysis identified and quantified 3835 proteins,730 lipids and 182 metabolites combining the 3 different types of *** blood plasma analysis revealed signatures of tissue damage and acute repair response accompanied by enhanced carbon metabolism to meet energy *** urine analysis showed a strong,concomitant regulation of 6 out of 8 identified proteins from the renin-angiotensin system supporting increased excretion of catabolites,reabsorption of nutrients and maintenance of fluid *** saliva,we observed a decrease in 3 pro-inflammatory cytokines and an increase in 8 antimicrobial peptides.A systematic literature review identified 6 papers that support an altered susceptibility to respiratory ***:This study shows simultaneous regulatory signatures in biofluids indicative of homeostatic maintenance during intense physical activity with possible effects on increased infection susceptibility,suggesting that caution against respiratory diseases could benefit workers on highly physical demanding jobs.

关键词： Multi-omics analysis Intense exercise Human performance Biofluids Metabolism Immunity

Study of geometric parameters for the design of short intakes with fan modelling

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Chinese Journal of Aeronautics 2022年第11期35卷 18-32页

作者： Andrea MAGRINI ernesto BENINI Dipartimento di Ingegneria Industriale Universitá degli Studi di PadovaPadova 35131Italy

The flow over a short intake is characterised by a strong interaction with the fan, that can only be captured when the rotor blades are modelled in the numerical simulations. In this paper, we use a coupled methodology to derive indications about relevant geometric variables affecting the high-incidence operation of an ultra-high bypass ratio turbofan intake with a length-to-diameter ratio of 0.35. By reproducing the effect of the fan through a body force model, we carry out a parametric study of the influence of the contraction ratio and the scarf angle at take-off conditions for a grid of 28 different three-dimensional shapes. The analysis of the selected performance metrics distributions at three angles of attack of 16., 24., and 28. reveals that a contraction ratio higher than 1.20 is needed to avoid separation at high incidence. While for an attached inlet the best performance is found with a moderate scarf angle, in presence of a developed separation the distortion level reduces as the scarf decreases up to negative values. We discuss the correspondence between the distortion indexes and the flow field, highlighting the origin of the detachment for the different geometries, according to the operating condition, and analysing the fan operation in the most distorted case. Finally, we assess the influence of modelling the rotor in the simulations, showing that its suppression effect on the separation at a given incidence depends on the intake geometric features.

关键词： Body force method Coupled methods Fan/intake interaction Nacelle aerodynamics Short intake UHBPR

Self-Organized Growth of Complex Nanotube patterns on Crystal Surfaces

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Nano Research 2009年第10期2卷 743-754页

作者： ernesto Joselevich Department of Materials and Interfaces Weizmann Institute of ScienceRehovot 76100Israel

The organization of carbon nanotubes into well-dened straight or curved geometries and arrays on surfaces is a critical prerequisite for their integration into nanocircuits and a variety of functional *** review the recent development of a new approach to carbon nanotube organization based on self-organized growth directed by well-defined crystal surfaces,or“nanotube epitaxy”.We identify three different modes of surface-directed growth,namely by atomic rows,atomic steps,and *** emphasis is given here to the combinations of such surface-directed growth with external forces-like those exerted by an electriceld or gas o-wfor the creation of well-de-ned complex geometries,including crossbar architectures,serpentines,and coils.

关键词： Nanotubes self-organization surface science nanostructures nanofabrication self-assembly

高校竞技健美操运动员落地偏侧性和稳定性的生物力学研究

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中国运动医学杂志 2024年第4期43卷 266-274页

作者：王莉莉 Wan Ahmad Munsif Bin Wan pa 王宇轩李风雷颉梦宁许春莲马来西亚国立大学教育学院吉隆坡43600 东华理工大学体育学院南昌330032 南昌交通学院体育学院南昌330100

目的:分析竞技健美操运动员落地动作的生物力学特征,比较优势侧和非优势侧生物力学指标的偏侧性,探究影响落地稳定性的关键偏侧性因素。方法:以26名高校女性健美操运动员为研究对象,同步采集40 cm高台垂直双脚落地动作中的下肢运动学和... 详细信息

目的:分析竞技健美操运动员落地动作的生物力学特征,比较优势侧和非优势侧生物力学指标的偏侧性,探究影响落地稳定性的关键偏侧性因素。方法:以26名高校女性健美操运动员为研究对象,同步采集40 cm高台垂直双脚落地动作中的下肢运动学和动力学数据,比较优势侧和非优势侧的触地时刻关节角度、关节活动度(ROM)、地面反作用力(GRF)、负载率、压力中心(COP)位移和包络面积的差异,计算对称指数(代表偏侧性),并采用多元逐步回归方法分析指标偏侧性和COP包络面积的关系。结果:与非优势侧相比,优势侧在触地时刻具有更大的膝外旋和髋外展角(P<0.05),在落地过程中具有较大的踝屈伸、髋屈伸、髋内收-外展及较小的踝旋转ROM(P<0.05);优势侧的伸膝力矩峰值大于非优势侧(P<0.01);垂直方向负载率和伸膝力矩峰值的对称指数与COP包络面积呈显著正相关(P<0.05);垂直方向负载率、伸膝力矩峰值和膝关节旋转角度的对称指数可以解释COP包络面积差异的83.6%。结论:竞技健美操运动员落地动作存在肢体间的偏侧性,垂直方向负载率和伸膝力矩峰值的偏侧性越大,则落地稳定性越差。此外,垂直方向负载率、伸膝力矩峰值和膝关节旋转角度的对称指数可以作为落地稳定性的预测因子。

关键词：健美操落地生物力学偏侧性稳定性

Effect of Water Stress Induced by Polyethylene Glycol on Growth, Proline Accumulation in Agave americana L.

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Phyton-International Journal of Experimental Botany 2023年第2期92卷 629-643页

作者： alfaro-corres Arnoldo Enrique Lecona-Guzman Carlos Alberto Gutiérrez-Miceli Federico Antonio Martínez-Esteves Manuel Silverio-Gómez María del Carmen Medina-Lara María de Fátima Ruiz-Lau Nancy Laboratorio de Biotecnología vegetal Instituto Tecnológico de Tuxtla GutiérrezTuxtla Gutiérrez29050México Centro de Investigación Científica de Yucatán Unidad de Bioquímica y Biología Molecular de PlantasMérida97205México Insituto Nacional de Investigaciones Forestales Agrícolas y PecuariasHuimanguilloTabasco86400México CONACYT-Tecnológico Nacional de México/Instituto Tecnológico de Tuxtla Gutiérrez Tuxtla Gutiérrez29050México

The effect of water deficit was determined on both in vitro and soil seedling as well as in cells in suspension of Agave americana *** order to do the establishment of cells,the formation of callus was induced;for it two auxins were evaluated:2,4-dichlorophenoxyacetic acid(2,4-D)and 4-mino-3,5,6-trichloropicolinic acid(picloram)at three concentrations(0.25,0.5 and 0.75 mg L−1)in three explants(leaf,root and meristems)cultured in MS semisolid *** callogenesis response was related to the type and section of the explant,as well as the regulator used,and a cell suspension was established using 0.5 mg L−1 naphthaleneacetic acid(NAA)+0.5 mg L−1 Benzylaminopurine(BAP).Seedlings were exposed to polyethyleneglycol(15%and 30%w/v)with a water potential of−0.87 and−2.67 Mpa,respectively,under soil *** stress was applied through restricted *** weight,root system growth,and chlorophyll concentration were some of the parameters that were affected by the effect of water deficit on *** *** concentration values were significantly decreased by 15 at 30%PEG(19.6 SpaD units)compared to the control *** in vitro plants,the highest concentration of proline was found in the roots,being the treatment with 30%polyethylene glycol where the highest concentration of this osmoregulator was obtained(62.5 mg g−1 DW).Under restricted irrigation conditions,an increase in proline concentration was observed both in the aerial part(2.2μg 100 g−1 DW)and in the root system(1.8μg 100 g−1 DW).However,the concentrations found were approximately ten times greater,less than those found under in vitro ***,the accumulation of proline can be considered an indicator of stress in Agave Americana *** in vitro.

关键词： Agave americana water deficit proline

浙西南山区菜用蚕豆水肥一体轻简化高产高效栽培技术

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长江蔬菜 2024年第15期 11-13页

作者：钟洋敏刘琼葛体达刘庭付王琳琳丽水市农林科学研究院浙江丽水市323000 宁波大学植物病毒学研究所省部共建农产品质量安全危害因子与风险防控国家重点实验室

针对菜用蚕豆种植中成本上升和效益下降的问题,提出了水肥一体轻简化高产高效栽培技术。该技术通过精准水肥管理,有效促进分枝、提高结荚率并延长采收期,每667 m^(2)产量增加至1500 kg以上。同时,通过减少人工和生产成本,提升了生产效... 详细信息

针对菜用蚕豆种植中成本上升和效益下降的问题,提出了水肥一体轻简化高产高效栽培技术。该技术通过精准水肥管理,有效促进分枝、提高结荚率并延长采收期,每667 m^(2)产量增加至1500 kg以上。同时,通过减少人工和生产成本,提升了生产效率。详细介绍了关键技术要点,包括品种选择、基地选择、整地作畦施基肥、铺设轻简化水肥一体化系统、苗期管理、花期管理,以及病虫害防治和采收等,为菜用蚕豆的现代化种植提供了有效的技术方案,有助于推动产业的可持续发展。

关键词：菜用蚕豆轻简化肥水一体化栽培技术

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小麦根内细菌群落与黄花叶病发生的关联机制

植物病理学报 2024年第2期54卷 398-409页

作者：张锐彬秦方锦张昊青吴传发祝贞科葛体达羊健陈剑平李科林中南林业科技大学环境科学与工程学院长沙410004 宁波市农业技术推广总站宁波315211 宁波大学植物病毒学研究所省部共建农产品质量安全危害因子与风险防控国家重点实验室农业部/浙江省植保生物技术重点实验室宁波315211

植物根系微生物组在宿主生长发育、养分吸收以及病害抵御等方面发挥重要作用。为探究小麦根系微生物组变化与黄花叶病发生的关联机制,进而寻求小麦黄花叶病的生物防治方法,本研究采集了健康(H)、中度发病(M)和重度发病(S)小麦根系样品,... 详细信息

植物根系微生物组在宿主生长发育、养分吸收以及病害抵御等方面发挥重要作用。为探究小麦根系微生物组变化与黄花叶病发生的关联机制,进而寻求小麦黄花叶病的生物防治方法,本研究采集了健康(H)、中度发病(M)和重度发病(S)小麦根系样品,研究了不同发病程度下小麦根内细菌群落结构及其环境驱动机制。结果表明:随着发病程度的增加,小麦根内细菌群落丰富度呈下降趋势。细菌群落结构在不同发病程度之间显著分异,且与根际土壤养分含量变化有关。其中短小杆菌属(Curtobacterium)、根瘤菌属(Rhizobium)、中慢生根瘤菌属(Mesorhizobium)、鞘氨醇单胞菌属(Sphingomonas)、人藤黄色杆菌属(Luteibacter)在发病小麦根内富集,其相对丰度与根际土壤中硝态氮(NO-3-N)、有效磷(AP)、有机碳(SOC)、全磷(TP)、全钾(TK)、植物体内碳(PC)含量呈显著正相关,与根际土壤中铵态氮(NH+4-N)、镁(Mg)含量呈显著负相关。泛菌属(pantoea)在健康小麦根内富集,其相对丰度与植物体内氮(PN)含量呈显著正相关。以上结果表明,小麦根内细菌群落结构变化与小麦黄花叶病的发生及根际土壤养分含量增加有关。

关键词：小麦黄花叶病根内细菌微生物多样性高通量测序