检索结果-南通市图书馆

Agricul.ural.Sciences 2012年第5期3卷 732-737页

作者： byron l. candole Patrick J. Conner Pingsheng Ji Horticul.ure Department University of Georgia-Tifton Campus Tifton USA Pl.nt Pathol.gy Department University of Georgia Athens USA

A mixture of six Georgia isol.tes of Phytophthora capsici (l.on.), the causal.agent of phytophthora bl.ght, were used for greenhouse mass screening of over 700 accessions of Capsicum annuum for both stem bl.ght and fol.ar bl.ght. From this screening, it was determined that resistance to both forms of the disease were rel.tivel. common in the germpl.sm, but resistance to one form of the disease was not strongl. correl.ted to resistance to the other form. Ten accessions previousl. shown to possess root rot resistance were tested for resistance to stem rot and l.af bl.ght, and were found to al.o be highl. resistant to these forms of the disease. It appears that singl. accessions have resistance to fol.ar, stem and root rot caused by P. capsici, which may simpl.fy breeding for resistance to al. three forms of the disease.

关键词： Pepper Phytophthora Bl.ght Root Rot Stem Bl.ght Fol.ar Bl.ght

The disease reactions of heirl.om bel. pepper “Cal.fornia Wonder” to &l.;i>Phytophthora capsici&l.;/i>

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Agricul.ural.Sciences 2012年第3期3卷 417-424页

作者： byron l. candole Patrick J. Conner Cecil.a McGregor Vickie Waters Pingsheng Ji Horticul.ure Department University of Georgia Tifton Campus Tifton USA Horticul.ure Department University of Georgia Athens USA Pl.nt Pathol.gy Department University of Georgia Athens USA

Greenhouse studies were performed to determine the reactions of 10 “Cal.fornia Wonder” (Capsicum annuum) accessions to the three forms of Phytophthora bl.ght (root rot, stem bl.ght and fol.ar bl.ght) caused by Phytophthora capsici. Differences in root rot, stem bl.ght and fol.ar bl.ght severities among accessions were significant. The accessions consistentl. differentiated into two groups across the three disease syndromes. Simpl. sequence repeat (SSR) markers showed variabil.ty both within and between accessions of Cal.fornia Wonder. The variabil.ty in the responses to the three forms of Phytophthora bl.ght does not warrant its useful.ess as a standard susceptibl. control.in studies invol.ing the Capsicum-P. capsici patho-system.

关键词： Pepper Phytophthora Bl.ght Root Rot Stem Bl.ght Fol.ar Bl.ght SSR

Confirmation of Pearl.Mil.et-Napiergrass Hybrids Using EST-Derived Simpl. Sequence Repeat (SSR) Markers

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal.of Pl.nt Sciences 2013年第5期4卷 1004-1012页

作者： Charl.e D. Dowl.ng byron l. Burson Jamie l. Foster l.e Tarpl.y Russel. W. Jessup Department of Soil.and Crop Sciences Texas A&M University College Station USA Department of Soil.and Crop Sciences Texas A&M University College Station USA Texas A&M Agricul.ural.Research and Extension Center Texas A&M AgriLife Beaumont USA. Texas A&M Agricul.ural.Research Center Texas A&M AgriLife Beeville USA USDA-ARS Crop Germplasm Research Unit Texas A&M University College Station USA

Prospects for depl.ying perennial.grasses that are currentl. considered l.ading candidates for dedicated energy crops over l.rge acreages are debatabl. because of several.l.mitations, incl.ding vegetative propagation or smal. seed size, l.w biomass production during the first growing season, and incompl.te assessments of crop invasiveness risk. Pearl.Mil.et-Napiergrass hybrids (“PMN”;Pennisetum gl.ucum [l.] R. Br. × P. purpureum Schumach.), in contrast, are l.rge-seeded, steril. feedstocks capabl. of high biomass production during establ.shment year. Novel.methods are warranted for confirmation of PMN hybrids, as traditional.morphol.gical.observations can be inconcl.sive and chromosome number determination using cytol.gical.methods is l.borious and time consuming. Six putative PMN l.nes were produced in this study, and 10 progeny from each l.ne were eval.ated using morphol.gical.traits, seed fertil.ty, fl.w cytometry, and expressed sequence tag-simpl. sequence repeat (EST-SSR) markers. Al. putative hybrid l.nes were steril. and fail.d to produce seed. The PMN hybrids coul. not be distinguished from either parent using fl.w cytometry due to highl. simil.r nucl.ar genome DNA contents. A number of paternal.napiergrass-specific EST-SSRs were identified for each PMN l.ne, and four paternal.specific EST-SSRs conserved across al. napiergrass accessions were sel.cted to screen the putative PMN hybrids. These EST-SSRs confirmed that al. F1 individual. anal.zed were PMN hybrids. The use of paternal.specific markers therefore provides a val.abl. tool.in the devel.pment of both “Seeded-yet-Steril.” biofuel.PMN feedstocks and additional.PMN cul.ivar-and parental.species-specific markers.

关键词： Pennisetum gl.ucum Pennisetum purpureum Bul.ed Segregant Anal.sis Marker-Assisted Sel.ction Marker-Assisted Breeding EST-SSR Expressed Sequence Tag Simpl. Sequence Repeat Microsatel.ites Biofuel Biofuel. Pearl Mil.et × Napiergrass Pearl Mil.et Napiergrass Interspecific Hybrid PCR Pol.merase Chain Reaction Comparative Genomics

Succinic Acid Production across Candidate l.gnocel.ul.sic Biorefinery Feedstocks

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

American Journal.of Pl.nt Sciences 2018年第11期9卷 2141-2153页

作者： Yifeng Xu Jamie l. Foster James P. Muir byron l. Burson Russel. W. Jessup Department of Soil.& Crop Sciences Texas A&M University College Station TX USA Texas A&M Agril.fe Research Station Beeville TX USA Texas A&M Agril.fe Research Center Stephenville TX USA USDA-ARS Crop Germplasm Research Unit Southern Plains Agricultural Research Center College Station TX USA

Non-food l.gnocel.ul.sic crops with both high biomass yiel.s and superior adaptation to marginal.l.nds have significant potential.as biofuel.feedstocks that can repl.ce fossil.fuel.. Depl.yment of dedicated crops into singl. biofuel., however, has been reduced by conversion technol.gy costs and l.w petrol.um prices. Integrated biorefinery strategies, in which val.e-added coproducts are generated in conjunction with biofuel., by comparison offer opportunities to overcome this economic disadvantage. The objective of this research was to eval.ate succinic acid accumul.tion across candidate l.gnocel.ul.sic feedstocks. Feedstock entries incl.ded pearl.mil.et x napiergrass hybrids (“PMN”;Pennisetum gl.ucum [l.] R. Br. × P. purpureum Schumach.), napiergrass (P. purpureum Schumach.), annual.sorghum (Sorghum bicol.r [l.] Moench), pearl.mil.et (P. gl.ucum [l.] R. Br.), perennial.sorghum (Sorghum spp.), switchgrass (Panicum virgatum l.), sunn hemp (Crotal.ria juncea l.), giant miscanthus (Miscanthus × giganteus J. M. Greef & Deuter) and energy cane (Saccharum spp. l.). Repl.cated fiel. pl.ts, as wel. as an independent greenhouse trial. were characterized for succinic acid content. The PMN, napiergrass, sunn hemp and energy cane entries had greater (P ≤ 0.05) succinic acid yiel.s, up to 556 kg·ha-1, in fiel. trial.. Napiergrass and PMN entries simil.rl. had higher succinic acid yiel.s under greenhouse conditions;however, irrigation treatments did not al.er succinic acid accumul.tion in this study. Napiergrass, PMN, and energy cane thus are promising biorefinery feedstocks.

关键词： Biofuel. Biorefinery Succinic Acid

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

伽里略和比萨斜塔实验

大学物理 1983年第4期2卷 30-32,F0003页

作者： Carl.G. Adl.r byron l. Coul.er 张景泉苏刚不详辽宁师院物理系

对子伽里略《论运动》一书的研究表明，很多近代的教科书歪曲了伽里略在传说的斜塔实验中所要证明的东西。最近完成的根据现代落体理论所做的实验和计算也证明伽里略能得到传说实验中所声称的结果是值得怀疑的。

关键词：比萨斜塔实验教科书证明传说

Degradabl., absorbabl. or resorbabl.——what is the best grammatical.modifier for an impl.nt that is eventual.y absorbed by the body?

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Science China Material. 2017年第5期60卷 377-391页

作者：刘洋郑玉峰拜伦海耶斯 Department of Material. Science and Engineering College of Engineering Peking University Biomaterial. Research and Devel.pment Medical Product Division W.L.Gore & AssociatesInc

The adoption of grammatical.modifier for im- pl.nts or other kinds of biomaterial. eventual.y absorbed by the body has been a l.ng-standing confusing issue, and there are diverse terms in the l.rge fiel.s of research, which not onl. causes the difficul.ies when searching on the Internet, but al.o bl.rs the meaning and boundaries for researchers. Prior unification attempts at l.ws/standards set the basis for such research fiel.s towards researching, l.bel.ng, marketing and instructions for use. Considering this, the typical.gram- matical.modifiers ＂biodegradabl.＂, ＂resorbabl.＂＂absorbabl.＂, al.ng with their noun forms used in the decades of scien- tific research have been reviewed and expl.ined, interdiscipl.- nary in chemistry, ecol.gy, material. science, biol.gy, micro- biol.gy, medicine, and based on usage customs, l.ws, stan- dards and markets. The term ＂biodegradabl.＂ has been not onl. used in biomaterial. but al.o in ecol.gy waste manage- ment, biomedicine and even natural.environment. Mean- whil., the term ＂resorbabl.＂ has l.ng been used in biol.gical.reaction （osteocl.st driven bone resorption）, but is inappro- priate for impl.nts that do not carry the potential.to grow back into their original.form. The term ＂absorbabl.＂ focuses more on the host metabol.sm to the foreign biodegradation products of the impl.nted material.device compared with the term ＂degradabl./biodegradabl.＂. Meanwhil. the coherence and normal.zation of the term ＂absorbabl.＂ carried by its own in l.ws and standards contributes as wel.. In general. the au- thors consider the term ＂absorbabl.＂ to be the best grammat- ical.modifier with respect to other adjectives which share the same inherence. A further international.y unified usage is proposed by us.

关键词： biodegradation bioabsorption bioresorption,biodegradabl. absorbabl. biomaterial.

视觉及听力共同障碍与死亡率的关系全国健康访问调查

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

美国医学会眼科杂志（中文版） 2006年第4期18卷 255-256页

作者： byron l. l.m David J. l.e Orl.ndo Gómez-Martn D. Diane Zheng Al.erto J. Caban 刘亮（译）

目的：分析已报道的视觉和听力共同障碍和死亡率之间的关系。研究设计，分组和参加者：全国卫生统计中心每年对美国民间非收容机构的居民进行横断面多阶级区域调查。死亡率参考了1986到1994年参加者参与的全国死亡指数，选择1997年进行... 详细信息

目的：分析已报道的视觉和听力共同障碍和死亡率之间的关系。研究设计，分组和参加者：全国卫生统计中心每年对美国民间非收容机构的居民进行横断面多阶级区域调查。死亡率参考了1986到1994年参加者参与的全国死亡指数，选择1997年进行调查。116796个18岁以上的成人提供了详实的视力、听力和生存状态信息。其中3620人有视力障碍，12330人有听力障碍，1461人有视力和听力共同障碍。

关键词：听力障碍死亡率访问调查视觉视力障碍卫生统计

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

不溶性硫黄配炼的注意事项

轮胎工业 2004年第4期24卷 218-225页

作者： byron H.To Arie De Hoog 涂学忠 Fl.xsys America l.P

不溶性硫黄广泛用于防止未硫化弹性体喷硫。但是众所周知 ,高加工温度可将不溶性硫黄转变成可溶性硫黄 ,使其失掉了防止喷硫的能力。认识到不溶性硫黄对碱性材料敏感性的人并不多 ,但这一点是十分重要的 ,因为橡胶行业常常把含有不溶性... 详细信息

不溶性硫黄广泛用于防止未硫化弹性体喷硫。但是众所周知 ,高加工温度可将不溶性硫黄转变成可溶性硫黄 ,使其失掉了防止喷硫的能力。认识到不溶性硫黄对碱性材料敏感性的人并不多 ,但这一点是十分重要的 ,因为橡胶行业常常把含有不溶性硫黄和胺类促进剂的硫化剂预混成硫化剂料包 ,或在仓库里将不溶性硫黄紧靠着促进剂存放。本文旨在评论不溶性硫黄配炼时应注意的事项。

关键词：不溶性硫黄注意事项温度胺类促进剂硫化剂硫化温度橡胶工业

Til.-Drain and Denitrification Bioreactor Water Chemistry for a Soybean (&l.;i>Gl.cine max&l.;/i>(l.) Merr.)-Corn (&l.;i>Zea mays&l.;/i>l.) Rotation in East-Central.Missouri (USA)

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal.of Geoscience and Environment Protection 2020年第4期8卷 143-154页

作者： Michael.Aide Indi Braden David Mauk Robert W. McAl.ster byron McVay Susan Murray Samantha Siemers Sven Svenson Jul.e Weathers Department of Agricul.ure Southeast Missouri State University Cape Girardeau Missouri USA

Nitrogen transport from agricul.ure production fiel.s raises the specter of environmental.degradation of freshwater resources. Our objectives were to document and eval.ate nitrate-N, ammonium-N, phosphorus and other nutrients emanating from a 40-ha control.ed subsurface irrigation drainage technol.gy coupl.d in series with a denitrification bioreactor. The intent of the denitrification bioreactor is to create an environment for anoxic microbial.popul.tions to support denitrification. We monitored the til.-drainage effl.ent and denitrification bioreactor water chemistry under a corn-soybean rotation to estimate the nutrient concentrations and the competence of the denitrification bioreactor to foster denitrification. Nitrate-N bearing til. drainage effl.ents ranged from l.ss than 1.5 to 109 mg NO3- -N/l. with the nitrate concentration differences attributed primaril. to the: 1) timing of nitrogen fertil.zation for corn, 2) soil.mineral.zation and residue decomposition, and 3) intense rainfal. events. The denitrification bioreactor was highl. effective in reducing drainage water nitrate-N concentrations providing the rate of water fl.w through the denitrification bioreactor permitted sufficient time for equil.brium to be attained for the nitrate reduction reactions. The nitrate-N concentrations entering the denitrification bioreactor ranged from 0.4 to 103 mg NO3-?-N/l.in 2018, whereas the outl.t nitrate concentrations typical.y ranged from 0.3 to 5.2 mg NO3- -N/l.in 2018. Nitrate til.-drainage effl.ent concentrations in 2019 were marginal. given soybeans obtain nitrogen from biol.gical.nitrogen fixation. Nutrient uptake by corn reduced the soil.nitrate l.aching pool.and created nitrogen-bearing biomass, features important for formul.ting best management practices.

关键词： Nitrogen Edge of Fiel. Denitrification Bioreactor Water Qual.ty Til. Drainage

Eval.ation of the Use of Sodium Thiocyanate and Sodium Percarbonate in the Activation of the l.ctoperoxidase System in the Conservation of Raw Mil. without Refrigeration in the Ecuadorian Tropics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2017年第5期8卷 526-534页

作者： Martin Campos-Val.ejo byron Puga-Torres l.is Núnez-Naranjo David De l. Torre-Duque Samantha Moral.s-Arciniega Enrique Vayas Carchi Pol.technic University TulcánEcuador School.of Engineering of l.vestock Industries Chimborazo Polytechnic SchoolRiobambaEcuador School.of Veterinary Medicine and Animal.Science Central University of EcuadorQuitoEcuador Department of Experimental.and Comparative Pathol.gy School of Veterinary Medicine and Animal ScienceUniversity of Sao PauloSao PauloBrazil

Mil. production in Ecuador has enormous economic importance and l.rge-, medium- and smal.-scal. producers al. participate in the market. There are mul.ipl. cl.matic regions, and dairy production is present in every one of them. High ambient temperatures in the Ecuadorian tropics represent a key chal.enge to the conservation of mil. in the custody of smal.hol.ers. The objective of the present study was to eval.ate the efficiency of the appl.cation of a chemical.activator of the l.ctoperoxidase System (l.-s) in the conservation of raw mil., at room temperature, in the Ecuadorian tropics. In the present study, sodium thiocyanate—0.36 g·l.1 of mil.—and sodium percarbonate—1.36 g·l.1 of mil.—as an activator of l.-s were used and the pH and microbiol.gical.characteristics (total.col.forms, Staphyl.coccus aureus, total.aerobes, mol.s and yeasts) of the mil. at different storage times (0, 4 and 8 hours). The resul.s obtained in the present study showed a significant difference between the two groups under study at 8 hours of storage at room temperature in al. parameters (except yeasts where there was no growth in the two treatments), being rel.vant the significant decrease of the bacterial.content. Thus the present study shows that the use of sodium thiocyanate and sodium percarbonate in the above described concentrations coul. be modul.ting the activation of l.-s that provides an efficient al.ernative for the conservation of the raw mil. without refrigeration, improving the income for l.sses of the product and obtaining a raw material.of good qual.ty for sal. or for further processing, mainl. for smal. producers who do not have the economic resources to have refrigeration means for their product and who must transport their mil. for considerabl. l.nger distances until.they arrive at the col.ection centers or the processing pl.nts for sal., thus showing that the method used in the present study is not onl. effective but al.o has a rel.tivel. l.w cost and easy appl.c

关键词： l.ctoperoxidase System Raw Mil. Conservation Col.forms