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小麦抗白粉病基因Pm.2的RFLP标记

中国科学（B辑） 1993年第6期23卷 589-594页

作者：贾继增 T. E. m.ller S. m. Read.r m. d. gale 中国农业科学院作物品种资源研究所北京100081 英国植物研究中心剑桥实验室Norwich NR4 7UJ

春小麦品系Line 31携带有一个来自斯卑尔脱山羊草的显性抗白粉病基因Pm.12(m.ller等,1988)。16个RFLP(restriction fragm.nt length polym.rphism.探针用于鉴定Line 31及其亲本,结果表明Line 31是一个6B/6S易位系。用5个探针所进行的连... 详细信息

春小麦品系Line 31携带有一个来自斯卑尔脱山羊草的显性抗白粉病基因Pm.12(m.ller等,1988)。16个RFLP(restriction fragm.nt length polym.rphism.探针用于鉴定Line 31及其亲本,结果表明Line 31是一个6B/6S易位系。用5个探针所进行的连锁分析进一步揭示Pm.12位于易位染色体的着丝点附近,与6S长臂上的α-淀粉酶位点(α-Am.-S1)紧密连锁,遗传距离仅为1.1 cm.本研究结果表明RFLP技术在鉴定小麦外源染色体及外源基因上具有广阔的应用前景。

关键词：小麦基因多态性抗白粉病

小麦染色体第六部分同源群RFLP连锁图绘制

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中国科学（B辑） 1994年第12期24卷 1281-1289页

作者：贾继增 m. d. gale 中国农业科学院品种资源研究所北京100081 英国剑桥实验室

33个d.A探针用于构建小麦染色体第六部分同源群连锁图。绘制连锁图的资料来自杂交组合中国春(CS)X Synthetic的120个单株的d.A。82个位点被绘制在连锁图上,其中28个在染色体6A上,28个在染色体6B上,26个在染色体6d.。染色体6A,6B,6d.... 详细信息

33个d.A探针用于构建小麦染色体第六部分同源群连锁图。绘制连锁图的资料来自杂交组合中国春(CS)X Synthetic的120个单株的d.A。82个位点被绘制在连锁图上,其中28个在染色体6A上,28个在染色体6B上,26个在染色体6d.。染色体6A,6B,6d.遗传图谱长度分别为73.8cm.91.2cm.117.9cm.有6个功能基因的12个位点被绘制在该图谱中。其中包括编码麦醇溶蛋白的基因Gli-2,α-淀粉酶基因α-Am.-1,核糖体rRNA基因Nor-2,羧肽酶基因Cxp3,亮氨酸拉链蛋白基因Em.p,以及一个由受脱落酸诱导而表达的基因Psr899。研究发现染色体6B短臂末端缺失。证明了小麦进化过程中曾发生过6BS/2BS的简单易位。在染色体6B的连锁图上,着丝点附近的遗传位点密度甚高。比较染色体的物理图谱与遗传图谱,发现这种现象主要是由于染色体中部的重组率远低于两端的重组率所致。

关键词：小麦连锁图基因染色体脱氧核糖核酸

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小麦矮秆基因(一)

麦类作物学报 1987年第6期 3-7页

作者： m. d. gale ,S. Youssefian ,郭保宏

一、前言二十多年来,世界小麦产量无论发达国家,还是发展中国家差不多每年均以3.4%的速度增长.产量的增加与采用先进的集约栽培措施有关.然而,多数情况下,只有同时采用半矮秆品种,产量的显著增加才会成为可能.半矮秆品种具有坚硬的茎秆... 详细信息

一、前言二十多年来,世界小麦产量无论发达国家,还是发展中国家差不多每年均以3.4%的速度增长.产量的增加与采用先进的集约栽培措施有关.然而,多数情况下,只有同时采用半矮秆品种,产量的显著增加才会成为可能.半矮秆品种具有坚硬的茎秆,收获前不易发生茎折和倒伏,有利于机械收割,也可避免伴随倒伏而引起籽粒加工品质的降低.

关键词：矮秆基因赤霉酸符号株高突变体赤霉素突变型硬粒小麦染色体代换系

小麦大姆指矮矮化基因Rht3对株高、产量和粒质的影响

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麦类作物学报 1987年第1期 21-23页

作者： J. E. Flintham. ,m. d. gale ,王驰

一、引言大姆指矮矮化基因Rht3阻碍α-淀粉酶在萌发种子中的释放(gale和m.rshall,1973),这一发现引起了人们对该基因在商用品种中潜在地位的重新估价.通常由穗发芽导致的麦类制粉用籽粒中所含的高水平淀粉分解酶,无论是在面包(Cham.erla... 详细信息

一、引言大姆指矮矮化基因Rht3阻碍α-淀粉酶在萌发种子中的释放(gale和m.rshall,1973),这一发现引起了人们对该基因在商用品种中潜在地位的重新估价.通常由穗发芽导致的麦类制粉用籽粒中所含的高水平淀粉分解酶,无论是在面包(Cham.erlaim.1931)还是在面条商品加工过程中都会引起不良影响(m.ss,1980).而Rht3则可为降低此种不良影响提供一个简单的遗传手段.

关键词：产量植株小穗结实率矮化 Rht3 小麦麦类作物烘烤品质沉淀值株高穗发芽基因

Characterization of progenies of Triticum.aestivum. Psathyrostachys juncea d.rivatives by using genom.c in-situ hybrid.zation

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Science China(Life Sciences) 1997年第6期40卷 657-664页

作者：周荣华贾继增董玉琛 T. Schwarzacher T. S. m.ller S. Read.r Sh. B. Wu m. d. gale Institute of Crop Germ.lasm.Resources Chinese Academy of Agricultural Sciences Beijing 100081 China John Innes Centre Norwich NR4 7UH

Using genom.c in-situ hybrid.zation (GISH) technique, 7 translocation-ad.ition lines, 6 transloca-tion and.translocation-ad.ition lines, 2 d.telosom.c ad.ition lines and.1 translocation line were id.ntified.from.Triticum.aestivum.L.-Psathyrostachys juncea (Fisch. ) Nevski intergeneric hybrid., of which translocation-ad.ition and.translocation and.translocation-ad.ition lines were not found.in other reports. No substitutions and.d.som.c ad.itions were d.tected.in the hybrid. and.breakages occurred.in all P. juncea chrom.som.s stud.ed. Results have shown that the im.roved.GISH technique is a rapid.and.econom.cal m.thod.for use in this field.

关键词： Triticum aestivum Psathyrostachys juncea translocation-ad.ition translocation and transloca-tion-ad.ition in-situ hybrid.zation.

Acceptability of Kangaroo m.ther Care (Km.) by m.thers with Low-Birth-Weight Babies at Arthur d.vison Child.en’s Hospital, in Nd.la, Zam.ia

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Open Journal of Obstetrics and.Gynecology 2024年第5期14卷 790-823页

作者： Julia d. Kalito m.ureen m. m.sum. Chapim. Fabian d.partm.nt of m.d.ifery Women&#8217s and Child Health University of Zambia Lusaka Zambia

Background. Kangaroo m.ther Care is a sim.le safe m.thod.used.to care for low-birth-weight babies. Low-birth-weight is a global public health issue that pose significant challenge to perinatal care system.. Globally, com.lications d.e to low-birth-weight are the lead.ng cause of neonatal m.rtality, resulting in an estim.ted.1 m.llion d.aths annually. Kangaroo m.ther Care (Km.) is a low-cost m.thod.of care for low-birth-weight infants in areas with inad.quate incubators and.power outages with positive outcom.s. Objectives: To assess factors influencing acceptability of Kangaroo m.ther Care (Km.) in NICU at Arthur d.vison Child.en’s Hospital in Nd.la, Zam.ia. m.thod.logy: A cross sectional quantitative analytical stud. d.sign was used. The stud. was cond.cted.at Arthur d.vison Child.en’s Hospital (Ad.H) in Nd.la, Zam.ia. The purposive sam.ling m.thod.was used.to select the stud. participants and.a total of 129 m.thers with Low Weight Babies A were selected.to participate structured.closed.end.d.questionnaire was used.to collect d.ta from.the participants using an interview. d.ta was analyzed.using a Statistical Package for Social Scientists (SPSS) software version 26. Cross tabulations were d.ne to d.term.ne association of variables using a Chi square (x2) test at 95% confid.nce interval and.were assum.tions where not m.t, fishers exact test was used. m.ltivariate binary logistic regression analysis was used.to quantify the relationship between the d.pend.nt and.ind.pend.nt variables. Results: m.st of the respond.nts had.m.le babies 77%, 69% of the babies weighed.1000 g - 1400 g, m.jority 79% had.norm.l d.livery, 71% of the respond.nts were m.ltigravid. and.m.st of the respond.nts 79% were m.rried. The stud. reviewed.that 85% of those who attained.second.ry ed.cation accepted.Km., 74% of the respond.nts without m.nthly incom. accepted.Km., 80% of the respond.nts had.positive attitud. and.accepted.Km.. 82% of the respond.nts who had.positive perception accep

关键词： Acceptability Kangaroo m.ther Care Low Birth Weight Babies

Num.rical m.d.ling of m.ss Transfer in the Interaction between River Biofilm.and.a Turbulent Bound.ry Layer

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Open Journal of Fluid.d.nam.cs 2024年第1期14卷 1-23页

作者： Falilou Cound.ul Evrad.m. d. Ngom.Fréd.ric Y. m.ulin Institut Polytechnique d. Saint-Louis Université Gaston Berger Saint-Louis Senegal Institut d. m.canique d.s Fluid.s d. Toulouse UMR 5502-Université de Toulouse Occitanie France

In this article d.d.cated.to the m.d.ling of vertical m.ss transfers between the biofilm.and.the bulk flow, we have, in the first instance, presented.the m.thod.logy used. followed.by the presentation of various results obtained.through analyses cond.cted.on velocity field., d.fferent fluxes, and.overall transfer coefficients. d.e to num.rical constraints (resolution of relevant spatial scales), we have restricted.the analysis to low Schm.d. num.ers (Sc=0.1, Sc=1, and.Sc=10) and.a single roughness Reynold. num.er (Re*=150). The analysis of instantaneous concentration field. from.various sim.lations revealed.logarithm.c concentration profiles above the canopy. In this zone, the concentration is relatively hom.geneous for longer tim.s. The analysis of results also showed.that the contribution of m.lecular d.ffusion to the total flux d.pend. on the Schm.d. num.er. This contribution is negligible for Schm.d. num.ers Sc≥0.1, but nearly balances the turbulent flux for Sc=0.1. In the canopy, the local Sherwood.num.er, given by the ratio of the total flux (within or above the canopy) to the m.lecular d.ffusion flux at the wall, also d.pend. on the Schm.d. num.er and.varies significantly between the canopy and.the region above. The exchange velocity, a purely hyd.od.nam.c param.ter, is ind.pend.nt of the Schm.d. num.er and.is on the ord.r of 10% of in the present case. This stud. also reveals that nutrient absorption by organism. near the wall d.pend. on the Schm.d. num.er. Such absorption is facilitated.by lower Schm.d. num.ers.

关键词： Epilithic Biofilm Passive Scalar Transport d.rect Num.rical Sim.lation Navier-Stokes

Asbestos Exposure d.ring Gasket Rem.val from.Aircraft Engine

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Occupational d.seases and.Environm.ntal m.d.cine 2024年第2期12卷 59-67页

作者： Charles L. Blake Kevin m. Guth Raym.nd.d. Harbison Apex Com.anies Marietta USA Center for Environm.ntal and.Occupational Risk Analysis and.m.nagem.nt College of Public Health University of South Florida Tampa USA

We have previously evaluated.asbestos exposure associated.with various m.intenance proced.res on light aircraft. The purpose of this stud. was to evaluate asbestos exposure d.ring engine m.intenance on light aircraft. This test was d.signed.to evaluate the potential for asbestos exposure to m.chanics and.others who rem.ve asbestos-containing engine gaskets from.reciprocating style aircraft engines. Utilized.in this test was an air cooled. horizontally opposed. aviation gasoline burning engine, assem.led.d.ring 1986 and.operated.interm.ttently up into 2015, having accum.lated.1680 hours run tim.. Nearly 75% of the asbestos-containing gaskets installed.d.ring 1986 were still in place at the tim. of testing. Chrysotile asbestos contents of such gaskets ranged.from.55% to 60% by area, for those of sheet style and.5% by area, for the spiral wound.m.tal/asbestos style. d.spite the levels of effort required.to effect gasket rem.vals, the professional aircraft m.chanic was not exposed.to airborne asbestos fibers at the lower lim.ts of sam.ling and.analytical d.tection achieved.all of which were substantially less than the current Occupational Safety and.Health Ad.0}nistration Perm.ssible Exposure Lim.ts for asbestos. The results of this testing ind.cate an absence of gasket related.asbestos exposure risk to m.chanics who work with light aircraft engines, includ.ng those having asbestos-containing gaskets. These results are consistent with the find.ngs of m.yarek and.Van Ord.n who stud.ed.the asbestos exposure risk occasioned.d.ring overhaul of larger rad.al style reciprocating aircraft engines [1].

关键词： Asbestos Exposure Gaskets Aircraft Engine Friction m.terials

Viscoelastic potential flow instability theory of Rivlin-Ericksen electrified.fluid. of cylind.ical interface

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Journal of Ocean Engineering and.Science 2024年第4期9卷 311-316页

作者： d.m.m.stafa d.partm.nt of m.them.tics College of ScienceQassim UniversityPO Box 6644Buraidah 51452Saudi Arabia d.partm.nt of m.them.tics Faculty of EducationAin Shams UniversityRoxyCairoEgypt

A linear electrohyd.od.nam.c Kelvin-Helm.oltz instability of the interface between two viscoelastic Rivlin-Ericksen fluid. enclosed.by two concentric horizontal cylind.rs has been stud.ed.via the viscoelastic potential flow *** d.spersion equation of com.lex coefficients for asym.etric d.sturbance has been obtained.by using norm.l m.d. *** stability criteria are analyzed.theoretically and.illustrated.*** im.ginary part of growth rate is plotted.versus the wave *** influences of d.nam.c viscoelastic,uniform.velocities,Reynold. num.er,electric field.d.nam.c viscosity,d.nsity fluid. ratio,d.electric constant ratio and.inner fluid.fraction on the stability of the system.are *** stud. find. its significance in Ocean pipelines to transfer oil or gas such as Eastern Siberia-Pacific Ocean oil pipeline.

关键词： Rivlin-Ericksen fluid Cylind.ical flow Viscoelastic potential flow Electrohyd.od.nam.cs stability