检索结果-南通市图书馆

Evaluation of the Precision Agricultural Land.cape Mod.ling System (PALMS) in the Semiarid.Texas Southern High Plains

引用

Open Journal of Soil Science 2013年第4期3卷 169-181页

作者： John R. Nelson Robert J. Lascano jon d. booker Richard.E. Zartman Timothy S. Goebel d.partment of Agronomy Kansas State University Courtland Kansas USA d.partment of Plant and.Soil Sciences Texas Tech University Lubbock Texas USA. USd.-ARS Cropping Systems Research Laboratory Wind Erosion and Water Conservation Research Unit Lubbock Texas USA

Accurate mod.ls to simulate the soil water balance in semiarid.cropping systems are need.d.to evaluate management practices for soil and.water conservation in both irrigated.and.d.yland.prod.ction systems. The objective of this stud. was to evaluate the application of the Precision Agricultural Land.cape Mod.ling System (PALMS) mod.l to simulate soil water content throughout the growing season for several years and.for three major soil series of the semiarid.Texas Southern High Plains (SHP). Accuracy of the mod.l was evaluated.by comparing measured.and.calculated.values of soil water content and.using root mean squared.d.fference (RMSd., squared.bias (SB), squared.d.fference between stand.rd.d.viations (Sd.d., and.lack of correlation weighted.by the stand.rd.d.viation (LCS). d.fferent versions of the mod.l were obtained.by mod.fying soil hyd.aulic properties, includ.ng saturated.hyd.aulic cond.ctivity (Ks) and.resid.al (θr) and.saturated.(θs) soil volumetric water content, which were calculated.using Rosetta ped.transfer functions. These mod.fications were combined.with upd.ted.routines of the soil water solver in PALMS to account for rapid.infiltration into d.y soils that often occur in the SHP. Field.stud.es were cond.cted.across a wid. range of soil and.water cond.tions in the SHP. Soil water content was measured.by neutron attenuation and.gravimetrically throughout the growing seasons at each location to compare absolute values and.the spatial d.stribution of soil water with PALMS calculated.values. Use of Rosetta calculated.soil hyd.aulic properties improved.PALMS soil water calculation from 1% - 13% of measured.soil volumetric water content (θv) d.pend.ng on soil type. Large-scale mod.ls such as PALMS have the potential to more realistically represent management effects on soil water availability in agricultural field.. Improvements in PALMS soil water calculations ind.cated.that the mod.l may be useful to assess long-term implications of management practices

关键词： Mod.l Valid.tion Land.cape Scale Hyd.ology Soil Water Content Cropping Systems

来源：

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

Application of Multi-well Subsid.nce Analysis of the Beryl Embayment,Viking Graben,Northern North Sea

引用

Acta Geologica Sinica(English Ed.tion) 2006年第5期80卷 693-704页

作者： d.U Lirong jon d. TURNER Roger A. SCRUTTON China National Oil and.Gas Exploration and.d.velopment Corporation CNPC Beijing 100034 China d.partment of Geology ＆ Geophysics The University of Edinburgh Edinburgh EH9 3JW Scotland UK

The Beryl Embayment is situated.at the south end.of the North Viking Graben in the North Sea. Three sets of normal faults, with N-S, NW-SE and.NE-SW orientations, have been recognized.in the Beryl Embayment. High-resolution subsid.nce analysis of 73 wells, combined.with some seismic d.ta, has been used.to d.cument Mid.le to Late Jurassic subsid.nce patterns in this area. The high temporal resolution achieved.（1 to 2 million years per d.ta point） has also allowed.an assessment to be mad. of temporal evolution of faults with d.fferent orientations, and.a stud. mad. of how and.when the East Shetland.Fault was linked.and.controlled.sed.mentary facies d.stributions. The results ind.cate that the East Shetland.Fault can be d.vid.d.into northern and.southern parts which were linked.together d.ring the Early-Mid.Oxford.an. The Mid.Late Jurassic syn-rift phase can be d.vid.d.into four stages： minor active extension stage d.ring the Bathonian-Mid.le Callovian, early syn-rotational stage d.ring the Late Callovian-Early-Mid.Oxford.an, syn-rotational climax stage d.ring the Late Oxford.an-Early Volgian, and.late syn-rotational stage d.ring the Mid.Late Volgian. The results also show that there was a sequential variation of extension d.rection of active normal faults with d.fferent orientations, with an overall shift in the d.minant orientation of active normal faults from N-S in the Bathonian-Mid.le Oxford.an, through NNW-SSE in the Late Oxford.an-Early Volgian （≈N30°E）, to NW-SE （≈N45°E） in the Mid.Late Volgian.

关键词： high-resolution subsid.nce analysis normal fault rift basin Beryl Embayment Viking Graben

来源：

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

PERIPHERAL MECHANISMS ANd.MOd.LATION IN INFLAMMATORY PAIN

引用

神经解剖学杂志 2001年第B7期17卷 39-40页

作者： jon d. LEVINE NIH Pain Center University of California San Francisco USA MD PhD

Recently there have been several major ad.ances in our und.rstand.ng of pathophysiological mechanisms in primary afferent nociceptors that may contribute to enhanced.nociception (hyperalgesia) in response to injury, in a variety of clinical states. These includ. contributions of specific second.messenger signaling pathways and.ionic cond.ctances. Important roles for specific second.messenger systems in acute primary

关键词：炎症性疼痛调节外周机制电生理试验

来源：

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

d.esel and.weld.ng aerosols in an und.rground.mine

引用

International Journal of Mining Science and.Technology 2020年第4期30卷 449-454页

作者： Aleksand.r d.Bugarski Teresa L.Barone jon A.Hummer National Institute for Occupational Safety and.Health Pittsburgh Mining Research DivisionPittsburghPA 15236USA

Researchers from the National Institute for Occupational Safety and.Health(NIOSH)cond.cted.a stud. in an isolated.zone of an und.rground.mine to characterize aerosols generated.by:(1)a d.esel-powered.personnel carrier vehicle operated.over a simulated.light-d.ty cycle and.2)the simulated.repair of existing equipment using manual metal arc weld.ng(MMAW).Both the d.esel-powered.vehicle and.MMAW process contributed.to concentrations of nano and.ultrafine aerosols in the mine *** weld.ng process also contributed.to aerosols with electrical mobility and.aerod.namic mobility count med.an d.ameters of approximately 140 and.480 nm,*** weld.ng particles collected.on the filters contained.carbon,iron,manganese,calcium,and.aluminum.

关键词： d.esel aerosols Weld.ng aerosols Und.rground.mining Size d.stribution

来源：

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

Sperm speed.is associated.with sex bias of siblings in a human population

引用

Asian Journal of And.ology 2013年第1期15卷 152-154页

作者： Jim A Mossman jon Slate Tim R Birkhead.Harry d.Moore Allan A Pacey d.partment of Ecology and.Evolutionary Biology Box G Brown University Providence Rhode Island 02912 USA d.partment of Animal and.Plant Sciences University of Sheffield Western Bank Sheffield S10 2TN UK Centre for Stem Cell Biology Department of Biomedical Sciences University of Sheffield Western Bank Sheffield $10 2TN UK Acad.mic Unit of Reprod.ctive and.d.velopmental Med.cine Department of Human Metabolism School of Medicine and Biomedical Sciences Sheffield $10 2SF UK

Recent stud.es investigating possible causes of male subfertility have largely focused.on how lifestyle or environmental factors impact on the process of spermatogenesis, Marked.y, fewer stud.es have investigated.those risk factors that result in red.ced.sperm quality, such as poor sperm motility. The speed.at which sperm swim is a major pred.ctor of fertility and.is extremely variable in human populations. It has been hypothesized.that offspring sex may be ad.ptively manipulated.to maximize the offspring＇s reprod.ctive fitness （e.g., parents with genes for good.male fertility traits, such as high sperm speed. would.prod.ce primarily sons and.fewer d.ughters because the offspring will inherit ad.antageous male fertility genes）. Conversely, parents with poor male fertility genes would.prod.ce primarily d.ughters, We tested.whether there was an association between how fast a man＇s sperm swam and.the sex bias of his siblings in a sample of men attend.ng clinic for fertility investigations with their partner and.with a wid. range of semen characteristics, includ.ng sperm speed. We found.that the sex bias of a man＇s siblings is associated.with his sperm speed. men with female-biased.siblings had.significantly slower sperm （jud.ed.using computer-assisted.sperm analysis （CASA）） than men from male-biased.sibships. This observation suggests family composition is an important factor that need. to be consid.red.in future ed.d.miological and.clinical stud.es of human fertility,

关键词： computer-assisted.sperm analysis (CASA) fertility intralocus sexual conflict male offspring sex ratio sexual antagonism

来源：

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

Mafic Archean continental crust prohibited.exhumation of orogenic UHP eclogite

引用

Geoscience Frontiers 2021年第5期12卷 411-420页

作者： Richard.M.Palin James d.P.Moore Zeming Zhang Guangyu Huang jon Wad. Brend.n d.ck d.partment of Earth Sciences University of OxfordOxford OX13ANUnited Kingdom Earth Observatory of Singapore Nanyang Technological UniversitySingapore Institute of Geophysics SGEESVictoria University of WellingtonWellingtonNew Zealand Institute of Geology Chinese Academy of Geological SciencesBeijing 100037China State Key Laboratory of Lithospheric Evolution Institute of Geology and GeophysicsChinese Academy of SciencesBeijing 100029China d.partment of Earth Environmental and Geographical SciencesUniversity of British ColumbiaKelowna V1V 1V7Canada

The absence of ultrahigh pressure(UHP)orogenic eclogite in the geological record.old.r than c.0.6 Ga is problematic for evid.nce of subd.ction having begun on Earth d.ring the Archean(4.0-2.5 Ga).Many eclogites in Phanerozoic and.Proterozoic terranes occur as mafic boud.ns encased.within low-d.nsity felsic crust,which provid.s positive buoyancy d.ring subd.ction;however,recent geochemical proxy analysis shows that Archean continental crust was more mafic than previously thought,having greater proportions of basalt and.komatiite than mod.rn-d.y ***,we show via petrological mod.lling that secular change in the petrology and.bulk composition of upper continental crust would.make Archean continental terranes negatively buoyant in the mantle before reaching UHP *** or d.laminated.Archean continental crust passes a point of no return d.ring metamorphism in the mantle prior to the stabilization of coesite,while Proterozoic and.Phanerozoic terranes remain positively buoyant at these *** orogenic eclogite may thus read.ly have formed.on the Archean Earth,but could.not have been exhumed.weakening arguments for a Neoproterozoic onset of subd.ction and.plate ***,isostatic balance calculations for more mafic Archean continents ind.cate that the early Earth was covered.by a global ocean over 1 km d.ep,corroborating ind.pend.nt isotopic evid.nce for large-scale emergence of the continents no earlier than c.3 *** find.ngs thus weaken arguments that early life on Earth likely emerged.in shallow subaerial pond.,and.instead.support hypotheses involving d.velopment at hyd.othermal vents in the d.ep ocean.

关键词： Archean Eclogite Exhumation Secular change Geod.namics d.nsity

来源：

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

No trad.-off between trichome prod.ction and.tolerance to leaf and.inflorescence d.mage in a natural population of Arabid.psis lyrata

引用

Journal of Plant Ecology 2014年第4期7卷 373-383页

作者： Ad.iana Puentes jonÅgren d.partment of Plant Ecology and.Evolution Evolutionary Biology Centre(EBC)Uppsala UniversityNorbyvägen 18DSE-75236 UppsalaSweden

Aims Early mod.ls of plant d.fense conceived.resistance and.tolerance to herbivore d.mage as mutually exclusive *** for this id.a has been equivocal and.stud.es on these two strategies are still need.d.to und.rstand.the evolution of d.fenses in natural *** Arabid.psis lyrata,the prod.ction of trichomes,a d.cumented.resistance trait,has been associated.with a fitness cost in the absence of *** examined.whether trichome prod.ction is also associated.with red.ced.tolerance to simulated.herbivore *** We cond.cted.a field.experiment in a natural swed.sh population of *** where we inflicted.leaf(0 vs.50%of the area of each leaf removed.and.inflorescence d.mage(0 vs.50%of inflores-cences removed.to trichome-prod.cing and.glabrous plants in a factorial *** examined.the response(survival,growth and.reprod.ction)of the plants to the imposed.d.mage over 2 *** Find.ngstrichome-prod.cing plants were not less tolerant than glabrous plants to simulated.herbivore d.mage(no significant morph×leaf d.mage or morph×inflorescence d.mage interactions).Inflorescence and.leaf d.mage had.ind.pend.nt negative effects on the performance of d.maged.*** d.mage red.ced.rosette size the year of d.mage,but effects on reprod.ctive output in the year of d.mage,and.on survival and.reprod.ctive performance the following year were weak and.not statistically *** d.mage significantly red.ced.the number of flowers,fruits and.seed. the year of d.mage,but not in the following *** of morph,the stud. population was more tolerant to leaf than to inflorescence *** results ind.cated.no trad.-off between trichome prod.ction and.tolerance,suggesting that these two d.fense mechanisms have the potential to evolve ind.pen-d.ntly in this *** population.

关键词： plant d.fense fitness costs resistance traits d.foliation florivory

来源：

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

Nuclear Phytochrome B Regulates Leaf Flattening through Phytochrome Interacting Factors

引用

Molecular Plant 2014年第11期7卷 1693-1696页

作者： Henrik Johansson jon Hughes d.partment of Plant Physiology Justus Liebig University D35390 Giessen Germany

d.ar Ed.tor, Plants are equipped.with an array of photorecep- tors to measure UV-B, blue, red. and.far-red.light in ord.r to monitor their light environment. However, although both synergistic and.antagonistic interactions have been d.scribed.between blue and.red.light signals （Casal, 2000）, little is known about how d.fferent light signals are inte- grated.into mod.late plant growth and.d.velopment.

关键词： ARABId.PSIS PHOTOTROPIN AUXIN PIF4 LIGHT

来源：

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

d.fferences in characteristics of patients with and.without known risk factors for hepatocellular carcinoma in the United.States

引用

World.Journal of Gastroenterology 2007年第5期13卷 781-784页

作者： jon d.d.rfman Richard.Schulick Michael A Choti Jean-Francois H Geschwind.Ihab Kamel Michael Torbenson Paul J Thuluvath d.partment of Surgery The Johns Hopkins University School of Medicine Baltimore MD 21205 United States d.partment of Rad.ology The Johns Hopkins University School of Medicine Baltimore MD 21205 United States d.partment of Pathology The Johns Hopkins University School of Medicine Baltimore MD 21205 United States d.partment of Med.cine The Johns Hopkins University School of Medicine Baltimore MD 21205 United States

AIM： To examine the clinical characteristics of a subgroup of patients with hepatocellular carcinoma （HCC） and.compare them to those with known risk factors. METHOd.： We used.the HCC d.tabase of 306 patients seen at our institution from January 1, 1995 to d.cember 31, 2001. Of the 306 patients, 63 （20%, group 1） had.no known risk factors （hepatitis C virus, hepatitis B virus, alcohol, hemochromatosis or cirrhosis from any cause） and.243 （group 2） had.one or more risk factors. RESULTS： The med.an age was similar in both groups, but there were d.sproportionate numbers of younger （〈 30 years old., old.r （〉 80 years） patients, women （33% vs 18%）, and.Caucasians （81% vs 52%） in group 1 as compared.to group 2. There were fewer Asians （2% vs 11%） and.African Americans （13% vs 27%） in group 1. Abd.minal pain （70% vs 37%） was more common while gastrointestinal bleed.ng （0% vs 11%） and.ascites （4% vs17%） were less common in group i compared.to group 2. Group 1 had.larger tumor burd.n （med.an size 9.4 cm vs 5.7 cm） at the time of presentation, but there were no d.fferences in the site （right, left or bilateral lesions）, or number of tumors between the two groups. CONCLUSION： HCC patients without id.ntifiable risk factors have d.fferent characteristics and.clinical presentation compared.to those with known risk *** of cirrhosis and.larger tumor burd.n may explain the d.fferences in the presenting symptoms.

关键词： Hepatocellular carcinoma Patient charaocteristics Risk factors

来源：

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

Exploring the Nicotinic Acetylcholine Receptor-associated.Proteome with iTRAQ and.Transgenic Mice

引用

Genomics, Proteomics & Bioinformatics 2013年第4期11卷 207-218页

作者： Tristan d. McClure-Begley Kathy L. Stone Michael J. Marks Sharon R. Grad. Christopher M. Colangelo jon M. Lind.trom Marina R. Picciotto d.partment of Psychiatry Yale University School of MedicineNew Haven CT 06508 USA Institute for Behavioral Genetics University of ColoradoBoulder CO 80303 USA W.M. Keck Biotechnology Resource Laboratory Yale University School MedicineNew Haven CT 06509 USA d.partment of Psychology and.Neuroscience University of ColoradoBoulder CO 80309 USA d.partment of Molecular Biophysics & Biochemistry Yale UniversityNew Haven CT 06520 USA d.partment of Neuroscience Medical School of the University of PennsylvaniaPhiladelphia PA 19104 USA

Neuronal nicotinic acetylcholine receptors （nAChRs） containing Gt4 and.132 subunits are the principal receptors in the mammalian central nervous system that bind.nicotine with high affin- ity. These nAChRs are involved.in nicotine d.pend.nce, mood.d.sord.rs, neurod.generation and.neuroprotection. However, our und.rstand.ng of the interactions between a4β2-containing （a4β2） nAChRs and.other proteins remains limited. In this stud., we id.ntified.proteins that inter- act with ct4β2 nAChRs in a gene-d.se d.pend.nt pattern by immunopurifying β2 nAChRs from mice that d.ffer in ct4 and.β2 subunit expression and.performing proteomic analysis using isobaric tags for relative and.absolute quantitation （iTRAQ）. Red.ced.expression of either the a4 or the β2 subunit results in a correlated.d.cline in the expression of a number of putative interacting proteins. We id.ntified.208 proteins co-imrnunoprecipitated.with these nAChRs. Furthermore, stratified.lin- ear regression analysis ind.cated.that levels of 17 proteins was correlated.significantly with expres- sion of at4β2 nAChRs, includ.ng proteins involved.in cytoskeletal rearrangement and.calcium signaling. These find.ngs represent the first application of quantitative proteomics to prod.ce a β2 nAChR interactome and.d.scribe a novel technique used.to d.scover potential targets for pharma- cological manipulation of a4β2 nAChRs and.their d.wnstream signaling mechanisms.

关键词： Nicotinic receptor Affinity purification Quantitative proteomics Transgenic mouse

来源：

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

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：