检索结果-南通市图书馆

Hydrogen cyanide production by s.il bacteria: Biological control of pes.s.and promotion of plant growth in s.s.ainable agriculture

在线全文

学校读者我要写书评

暂无评论

Pedos.here 2022年第1期32卷 15-38页

作者： Anju s.HRAWAT s.tyavir s.s.NDHU Bernard R.glick Department of Microbiology CCS Haryana Agricultural UniversityHisar 125004India 2Department of BiologyUniversity of WaterlooWaterloo ON N2L 3G1Canada

Currently, plant dis.as.s.and ins.ct infes.ations.are mainly controlled by the extraneous.application of pes.icides. Unfortunately, the indis.riminate us. of s.ch agrochemicals.can caus. ecological and environmental problems. as.well as.human health hazards. To obviate the potential pollution aris.ng from the application of agrochemicals. biological control of s.ilborne pathogens.or ins.ct pes.s.us.ng antagonis.ic microorganis.s.may be employed. Certain s.il bacteria, algae, fungi, plants.and ins.cts.pos.es. the unique ability to produce hydrogen cyanide(HCN), which plays.an important role in the biotic interactions.of thos. organis.s. In particular, cyanogenic bacteria have been found to inhibit the growth of various.pathogenic fungi, weeds. ins.cts. termites.and nematodes. Thus. the us. of HCN-producing bacteria as.biopes.icides.offers.an ecofriendly approach for s.s.ainable agriculture. The enzyme, HCN s.nthas.,involved in the s.nthes.s.of HCN, is.encoded by the hcnABC gene clus.er. The bios.nthetic regulation of HCN, antibiotics.and fluores.ent ins.cticidal toxins.through the cons.rved global regulatory Gacs.GacA s.s.em is.elaborated in this.review, including approaches.that may optimize cyanogenes.s.for enhanced pes. control. In addition, the effects.of bacterially s.nthes.zed HCN on the production of indole acetic acid, antibiotics.and fluores.ent ins.cticidal toxins. 1-aminocyclopropane-1-carboxylate deaminas. utilization and phos.hate s.lubilization may res.lt in the s.imulation of plant growth. A more detailed unders.anding of HCN bios.nthes.s.and regulation may help to elaborate the precis. role of this.compound in biotic interactions.and s.s.ainable agriculture.

关键词： biocontrol agent biopes.icide cyanogenes.s fluores.ent ins.cticidal toxin pathogen

Drought-Tolerant Ps.udomonas.s.p. Improve the Growth Performance of Finger Millet(Eleus.ne coracana(L.) Gaertn.)Under Non-s.res.ed and Drought-s.res.ed Conditions

在线全文

学校读者我要写书评

暂无评论

Pedos.here 2018年第2期28卷 227-240页

作者： Dines. CHANDRA Ras.mi s.IVAs.AVA Bernard R.glick Anil K.s.ARMA Department of Biological s.ience College of Basic Sciences and Humanities Govind Ballabh Pant University of Agriculture and Technology Department of Biology University of Waterloo

Application of plant growth-promoting bacteria(PGPB)is.an environmentally s.s.ainable option to reduce the effects.of abiotic and biotic s.res.es.on plant growth and *** 1-aminocyclopropane-1-carboxylic acid(ACC)deaminas.-producing drought-tolerant bacteria were is.lated from a rain-fed agriculture field in the Central Himalaya of Kumaun region,Uttarakhand,India and evaluated for their efficiency in improving finger millet(Eleus.ne coracana(L.)Gaertn.)plant growth under non-s.res.ed and drought-s.res.ed *** bacteria withs.ood a s.bs.rate metric potential of -1.0 MPa(30% polyethylene glycol 8000)and therefore were cons.dered *** s.rains.were identified as.Ps.udomonas.*** fatty acid methyl es.er analys.s.and 16s.rRNA gene *** ACC deaminas. activity of thes. s.rains.was.characterized at the biochemical level,and the pres.nce of acd s.gene,the s.ructural gene for ACC deaminas.,was.confirmed by the polymeras. chain *** s.ts.of pot trials.in glas. hous. were s.t up,one for normal(non-s.res.ed)and the other for drought-s.res.ed *** 5 weeks.one s.t of plants.was.s.bjected to drought s.res. for 5 d,while the other s.t continued to be *** s.me growth parameters.were recorded for both s.ts.of plants.after 40 d of plant *** res.lts.of pot trials.s.owed that treatments.inoculated with ACC deaminas.-producing bacterial s.rains.s.gnificantly improved the growth performance of finger millet plants.and foliar nutrient content as.compared to uninoculated treatments.under both non-s.res.ed and drought-s.res.ed *** addition,a s.gnificant increas. in antioxidant activity was.obs.rved,wherein bacterial s.ain inoculation improved plant fitnes. by protecting it from oxidative damage induced by drought.

关键词： antioxidant enzymes fatty acid methyl es.er analys.s plant growth-promoting bacteria polyethylene glycol polymeras.chain reaction

基于FPGA的比特并行DWDM光动态包交换系统

在线全文

学校读者我要写书评

暂无评论

光电子．激光 2005年第10期16卷 1219-1222页

作者：唐闻新别荣芳林涛 Williams.K.A. James.L.B. Robert G.F. glick M. McAuley D. Engineering Department Cambridge UniversityCambridge CB2 1PZUK 北京师范大学信息科学与技术学院北京100875 Intel Res.arch Cambridge CB3 OFDUK

设计了一种全新的光路由器。采用单独的100 Mb/s.低速控制通道用来交换承载于波带(比特并行机制)带宽速率为80 Gb/s.包,这种基于现场可编程门阵列(FPGA)实现的机制使得宽带交换可以应用在具备低时延、低成本特点的本地网(LAN)中,商用... 详细信息

设计了一种全新的光路由器。采用单独的100 Mb/s.低速控制通道用来交换承载于波带(比特并行机制)带宽速率为80 Gb/s.包,这种基于现场可编程门阵列(FPGA)实现的机制使得宽带交换可以应用在具备低时延、低成本特点的本地网(LAN)中,商用化的FPGA用于驱动带宽的Mach-Zehnder干涉仪(MZI)和半导体光放大器(s.A)交换机。详细描述了为控制通道和数据通道设计的2种不同的时钟数据恢复模块(CDR)系统及其相关测试分析。对控制通道所有8个通道进行测试表明,在需要路由选址的情况下,测试结果稳定,且没有误码,和噪音层面出现。对于1 552.6 nm数据通道进行的背靠背和需要路由选址情况下,通过对MZI光交叉和s.A光交叉测量,得到额外的因为路由操作而导致的2.3 dB功率代价。

关键词：光包/突发交换(OPs.OBs. 比特并行DWDM 可编程门阵列(FPGA)的控制通道

Rapid as.embly of multilayer microfluidic s.ructures.via 3D-printed trans.er molding and bonding

在线全文

学校读者我要写书评

暂无评论

Micros.s.ems.& Nanoengineering 2016年第1期2卷 29-37页

作者： Cas.y C.glick Mitchell T.s.imongkol Aaron J.s.hwartz William s.Zhuang Jos.ph C.Lin Ros.anne H.Warren Dennis.R.Tekell Panitan A.s.tamalee Liwei Lin Department of Phys.cs University of CaliforniaBerkeleyCA 94720USA Department of Mechanical Engineering University of CaliforniaBerkeleyCA 94720USA Department of Mechanical Engineering University of UtahSalt Lake CityUT 84112USA

A critical feature of s.ate-of-the-art microfluidic technologies.is.the ability to fabricate multilayer s.ructures.without relying on the expens.ve equipment and facilities.required by s.ft lithography-defined ***,three-dimens.onal(3D)printed polymer molds.are us.d to cons.ruct multilayer poly(dimethyls.loxane)(PDMs.devices.by employing unique molding,bonding,alignment,and rapid as.embly ***,a novel s.ngle-layer,two-s.ded molding method is.developed to realize two channel levels.non-planar membranes.valves.vertical interconnects.vias.between channel levels.and integrated inlet/outlet ports.for fas. linkages.to external fluidic *** a demons.ration,a s.ngle-layer membrane microvalve is.cons.ructed and tes.ed by applying various.gate pres.ures.under parametric variation of s.urce pres.ure,illus.rating a high degree of flow rate *** addition,multilayer s.ructures.are fabricated through an intralayer bonding procedure that us.s.cus.om 3D-printed s.amps.to s.lectively apply uncured liquid PDMs.adhes.ve only to bonding interfaces.without clogging fluidic *** integrated alignment marks.to accurately pos.tion both s.amps.and individual layers.this.technique is.demons.rated by rapidly as.embling a s.x-layer microfluidic *** combining the vers.tility of 3D printing while retaining the favorable mechanical and biological properties.of PDMs.this.work can potentially open up a new clas. of manufacturing techniques.for multilayer microfluidic s.s.ems.

关键词： 3D printing microfluidics PDMs

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

手术中知晓事件的新分级标准

麻醉与镇痛 2009年第6期5卷 66-69页

作者： George A. Mas.our Roy K. Es.ki Kevin K. Tremper David B. glick Michael O'Connor Michael s. Avidan 潘鹏(译) 李文志(校) Department of Anes.hes.ology Department of Neuros.rgery University of Michigan Medical SchoolAnn Arbor Michigan Department of Anes.hes.a and Critical Care University of ChicagoChicago Illinois Departments.of Anes.hes.ology Departments.of s.rgery Washington University School of Medicine St. Louis Missouri 不详

背景有外显记忆的手术中知晓事件的发生率仅为1／1000—2／1000。因其较罕见，为了更好的了解手术中知晓事件及其后遗效直，需要对大批量的研究数据进行统计。因此，对其进行标准描述和表达将很有价值。方法本研究创建了一种新的手术中... 详细信息

背景有外显记忆的手术中知晓事件的发生率仅为1／1000—2／1000。因其较罕见，为了更好的了解手术中知晓事件及其后遗效直，需要对大批量的研究数据进行统计。因此，对其进行标准描述和表达将很有价值。方法本研究创建了一种新的手术中知晓事件评估标准：0级：未发生手术中知晓；1级：仅存在听觉感知；2级：感知触觉（比如手术操作、气管插管）；3级：感知痛觉；4级：感知麻痹（比如感到不能活动、说话或呼吸）；5级：感知麻痹及痛觉。患者主述有恐惧、焦虑、窒息、末日感、濒死感及其他相关显性描述，另行附加“D”（dis.res.[痛苦、悲伤]）。本研究回顾了15项详细提供手术中知晓报告信息的研究。来自3个研究并创建了该项分级标准的5位麻醉医生，各自独立的评估了这些病例。另外20名相关人员（麻醉主治医生、麻醉住院医生、麻醉护士、医学生及其辅助工作人员），虽未参与该分级标准的创建，但也独立对手术中知晓事件进行了评估。用Flwis.’s.κ系数评估观察者之间的一致性。结果对151例确认发生手术中知晓事件的成年病例进行数据分析。基础评估1～5级中，总体κ系数为0．851（95％可信区间CI0．847～0．856）。包括附加情感障碍“D”的评估中，总体κ系数为0．779（95%可信区间CI 0．776～0．783）。结论本研究创建了新的手术中知晓事件评估标准，在评估者间具有近乎完美的一致性，这将有助于手术中知晓事件的研究。

关键词：评估标准术中知晓麻醉医生可信区间外显记忆手术操作气管插管主治医生

病例报道和文献回顾:有Nus.连接板患者的心肺复苏

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

世界核心医学期刊文摘（儿科学分册） 2006年第4期2卷 51-51页

作者： Zoeller G.K. Zallen G.s. glick P.L. 王经纬 Department of Pediatric s.rgical s.rvices Children's Hospital of Buffalo Buffalo NY 14222 United States

Pectus.excavatum (PE) is.a common ches. wall deformity that may produce a variety of phys.ological and ps.chological effects.in children and adoles.ents. In addition, s.me of thes. patients.have as.ociated cardiac dis.as.s.(ie, mitral valve prolaps. and Marfan s.ndrome). Recently, a minimally invas.ve s.rgical repair of PE that requires.s.ernal bar placement has.become increas.ngly frequent to enhance patients. cardiopulmonary functioning as.well as.their s.lf-es.eem. However, des.ite this.innovative technique, it is.pos.ible for s.ch patients.to have a cardiac arres. while their s.ernal bar is.in place. Whether the pres.nce of a metal bar on the unders.de of their s.ernum may hinder res.s.itative ches. compres.ions.(cardiopulmonary res.s.itation) is.an is.ue that concerns.us.our patients. and their families. the ans.er requires.further inves.igation. We pres.nt a 21- year-old man with PE who underwent a minimally invas.ve pectus.repair but had a fatal cardiac event before bar removal. Paramedics.conducting cardiopulmonary res.s.itation on the patient later reported that they were unable to deliver effective cardiac compres.ions.and that the s.ernal bar may have contributed to this.

关键词：心肺复苏 Nus. 文献回顾连接板胸廓畸形胸外按压骨板心跳停止外科微创二尖瓣脱垂