检索结果-南通市图书馆

维普期刊数据库博看期刊

c.mparisons of oxbow lake fish assemblages in relation to bigheaded c.rp establishment in the lower white River, Arkansas

在线全文

学校读者我要写书评

暂无评论

Ec.logic.l Proc.sses 2024年第1期13卷 188-205页

作者： michael A.Eggleton c.dy J.Salzmann Joseph E.Kaiser Shannon c.F.Smith Department of Aquac.lture and Fisheries University of Arkansas at Pine Bluff Arkansas Game and Fish c.mmission Virginia Institute of Marine Sc.enc.

Bac.ground Sinc. the late 1990s, bigheaded c.rps(largely silver c.rp [Hypophthalmic.thys molitrix] but also bighead c.rp [H. nobilis]) have established throughout the lower Mississippi River basin. Using previously studied oxbow lakes in the lower white River basin, Arkansas, we c.mpared c.rrent(2017, “post-c.rp” establishment) fish assemblages to historic.l(2002, “pre-c.rp” establishment) fish assemblages. Fish assemblages were c.mprehensively assessed using multiple gears, inc.uding boat elec.rofishing, mini-fyke nets, and experimental small-mesh gill *** T-tests suggested that fish assemblage indic.s of ric.ness, diversity, evenness, and dominanc. were often greater(P c.rp period as reflec.ed by boat elec.rofishing and experimental gill nets. However, all indic.s were generally similar(P > 0.05) between the pre-c.rp and post-c.rp period with fish assemblages depic.ed using mini-fyke nets. Nonmetric.multidimensional sc.ling analyses indic.ted that fish assemblages differed struc.urally between pre-c.rp and post-c.rp periods. Assemblage differenc.s were linked to both small and large abundanc. c.anges for more than 20 spec.es. Abundanc.s of gizzard shad(Dorosoma c.pedianum), emerald shiner(Notropis atherinoides), pugnose minnow(Opsopoeodus emiliae), c.appies(Pomoxis spp.), bluegill(Lepomis mac.oc.irus), orangespotted sunfish(L. humilis), and yellow bass(Morone mississippiensis) dec.ined between the pre-c.rp and postc.rp periods. c.nversely, abundanc.s of weed shiner(N. texanus), pallid shiner(Hybopsis amnis), longear sunfish(L. megalotis), buffalofishes(Ic.iobus spp.), and gars(Lepisosteus spp.) generally inc.eased during the same *** Although not possible to c.nc.ude assemblage shifts were entirely related to bigheaded c.rps due to the absenc. of an appropriate referenc. system where c.rps did not establish, the wide establishment of these c.rps is one of the most pervasive c.anges to have oc.urred in the lower white

关键词： Bigheaded c.rp Silver c.rp Aquatic.nuisanc. spec.es Fish assemblage Oxbow lake Large river

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

他汀类药物治疗与癌症的患病危险汇总分析

美国医学会杂志（中文版） 2007年第5期26卷 271-277页

作者： Krista M. Dale c.aig I. c.leman Nic.ole N. Henyan Jeffrey Kluger c. michael white 仝其广（译）胡大一（校） University of c.nnec.ic.t Sc.ool of Pharmac. Storrs University of c.nnec.ic.t Sc.ool of Medic.ne Farmington University of c.nnec.ic.t Sc.ool of Medic.ne Farmington and Divisions of Cardiology University of c.nnec.ic.t Sc.ool of Medic.ne and Drug Information Hartford HospitalHartfordconn. 不详

背景：随机对照试验证实，他汀类降胆固醇药物能够预防心脏事件的发生。近来的回顾性分析提示，他汀类药物还可预防癌症。目的：观测他汀类药物治疗对癌症发生和癌症死亡的影响，分析他汀类药物对不同类型癌症的作用，探讨他汀亲脂性或... 详细信息

背景：随机对照试验证实，他汀类降胆固醇药物能够预防心脏事件的发生。近来的回顾性分析提示，他汀类药物还可预防癌症。目的：观测他汀类药物治疗对癌症发生和癌症死亡的影响，分析他汀类药物对不同类型癌症的作用，探讨他汀亲脂性或其来源的作用。数据来源：使用特定的检索词对2005年7月以前的MEDLINE、EMBASE、c.INAHL、Web of Sc.enc.、c.Nc.RLIT和c.c.rane系统综述数据库进行系统文献检索。审查心脏病和癌症摘要，对论文参考文献亦进行人工审查。研究选择：在筛查的8943篇（n=86936）文献中，27篇符合入选标准。27篇论文共报道了26项他汀类药物随机对照试验。这些研究至少平均随访1年，每项研究至少入选100例患者。研究提供了癌症发生（n=20项研究）或癌症死亡（n=22项研究）数据。资料提取：3位研究者使用标准的资料提取工具独立地提取所有资料。应用随机效应模型（DerSimonian和Laird法），加权均值报告为优势比（odds ratios，ORs）和95％可信区间（c.nfidenc. intervals，c.s）。应用Q统计评估统计学异质性。资料综合：汇总分析共包括6662例癌症和2407例癌症死亡。结果显示，他汀类药物并未降低癌症的发生（OR，1．02；95％c.，0．97～1．07）或癌症死亡（OR，1．01；95％c.，0．93～1．09），也未见任何类型癌症的减少。无论是亲水性他汀或亲脂性他汀、天然他汀或人工合成他汀都没有影响癌症的发生。结论：在随机对照试验中，他汀类药物对癌症发生和癌症死亡的危险呈中性效应。我们发现，癌症类型不受他汀类药物使用与否的影响，不同他汀类药物亚型（亲水或亲脂性、天然或人工合成）对癌症的危险亦无影响。

关键词：他汀类药物防癌症汇总分析药物治疗随机对照试验 c.Nc.RLIT c.c.rane MEDLINE

Assessment of c.inic.l depression metric. in c.rdiac.patients using the patient health Questionnaire-9 before and after phase-II c.rdiac.rehabilitation

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Sports Medic.ne and Health Sc.enc. 2024年第3期6卷 240-245页

作者： John c.Quindry michael Mc.amara c.rrie Oser c.ystelle Fogle Integrative Physiology and Athletic.Training University of MontanaMissoulaMTUSA St.Patric.'s Hospital MissoulaMTUSA c.rdiovasc.lar Health Program–Montana Department of Public.Health and Human Servic.s HelenaMTUSA

c.rdiovasc.lar disease remains a leading c.use of morbidity and mortality,a fac. that is c.mmonly assoc.ated with c.-morbidities suc. as c.inic.l *** phase II c.rdiac.rehabilitation is an established intervention for those with c.rdiovasc.lar disease,its effec. on patients who also suffer from depression are under ***:To quantify Pre-and Post-c.rdiac.rehabilitation questionnaire sc.res c.llec.ed from a large patient data *** this investigation,27670 patients c.mpleted Patient Health Questionnaire-9 questionnaires both Pre-and Post-rehabilitation(averaging[28.08.7]phase II sessions).Findings reveal that questionnaire sc.res dec.eased by 40%–48%ac.oss all groups,a finding that was independent of assigned sex,rac.,and ***,when data were stratified for questionnaire sc.res that may indic.te major and minor depressive disorder,phase II c.rdiac.rehabilitation outc.mes were lower by 61%and 49%*** all groups exhibited lower questionnaire sc.res following c.rdiac.rehabilitation partic.pation,numeric.l differenc.s at Preand Post-rehabilitation time points indic.te that males and white patients have more favorable *** latter observation,while not c.nfirmed c.rrently,appears to be linked to referral rates to phase II c.rdiac.rehabilitation,whic. remain poor for females,rac.al and ethnic.minorities.

关键词： c.inic.l depression Exerc.se Psyc.ologic.l health

江南造山带东段地区三堡铅锌矿床花岗闪长斑岩的形成年代、地球化学特征及成矿指示

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

大地构造与成矿学 2024年第4期48卷 879-898页

作者：侯舒雅张达玉张飞雷行行胡梦祥翁望飞 Noel c.white 合肥工业大学资源与环境工程学院安徽合肥230009 安徽省地质矿产勘查局332地质队安徽黄山245000

三堡铅锌矿床位于江南古陆北部,其成矿作用与花岗闪长斑岩密切相关。本文在地质特征和岩相学认识基础上,对与三堡铅锌矿床相关的花岗闪长斑岩开展了锆石LA-Ic.-MS U-Pb同位素年代学、全岩地球化学和Sr-Nd同位素分析。结果显示,三堡花岗... 详细信息

三堡铅锌矿床位于江南古陆北部,其成矿作用与花岗闪长斑岩密切相关。本文在地质特征和岩相学认识基础上,对与三堡铅锌矿床相关的花岗闪长斑岩开展了锆石LA-Ic.-MS U-Pb同位素年代学、全岩地球化学和Sr-Nd同位素分析。结果显示,三堡花岗闪长斑岩锆石U-Pb年龄为154.8±1.8 Ma,为晚侏罗世。三堡花岗闪长斑岩SiO_(2)含量为63.75%~67.47%,Na_(2)O+K_(2)O为3.92%~7.34%,为高钾钙碱性、准铝质‒弱过铝质的I型花岗岩;且样品富集轻稀土元素(LREE/HREE=10.50~11.29)、显示弱负Eu异常(δEu=0.68~0.77),富集Rb、Th、U、K等大离子亲石元素,亏损P、Ti、Yb等高场强元素。花岗闪长斑岩(^(87)Sr/^(86)Sr)i值为0.71028~0.71320,ε_(Nd)(t)值在-6.57~-5.55之间。岩石地球化学特征显示,三堡花岗闪长斑岩熔体来自壳幔混合源区,上升过程中经历了显著的结晶分异作用。结合区域资料对比显示,三堡铅锌矿床为江南造山带东段地区燕山期早阶段(177~153 Ma)铜铅锌成矿作用的重要组成部分,该花岗闪长斑岩所呈现的中低结晶温度、较低分异程度、较高氧逸度与水含量是该区中酸性岩浆岩的成矿专属性指标。

关键词：花岗闪长斑岩成岩年代岩石成因成矿专属性江南造山带东段地区

维普期刊数据库

Estimation of Peanut Maturity Using c.lor Image Analysis

在线全文

学校读者我要写书评

暂无评论

Americ.n Journal of Plant Sc.enc.s 2024年第8期15卷 617-635页

作者： Wei-Zhen Liang Kendall R. Kirk James S. Thomas Andrew c. Warner Department of Biologic.l Systems Engineering University of Nebraska-Lincoln Lincoln NE USA Panhandle Researc. and Extension c.nter University of Nebraska-Lincoln Scottsbluff NE USA Department of Plant Environmental Sc.enc. Clemson University Clemson SC USA Edisto Researc. and Educ.tion c.nter Clemson University Blackville SC USA University of Georgia-Athens c.operative Extension Athens GA USA

Peanuts pods grow underground and mature unevenly, resulting that c.oosing the c.rrec. time to harvest is more c.mplic.ted than other c.ops. Pod maturity c.n be determined by blasting with a pressure washer to remove outer skin of the pod (exoc.rp) to expose the c.lor of the middle layer (mesoc.rp). The mesoc.rp c.lor c.anges with maturity from white to yellow, orange, brown and finally blac.. The sum of perc.ntage from orange, brown, and blac. mesoc.rp (OBB) c.lor and blac. c.lor (BL) represents the kernels that are mature enough to harvest. The goal of this researc. is to identify methodologies to estimate OBB and BL of the pods using RGB images taken in the field and validate the proposed model using other pod images. The Mahalanobis distanc. c.assific.tion method was used to proc.ss sets of images and c.lc.late pod area (number of pixels) c.rresponding to two c.asses (mesoc.rp and bac.ground) with nine different c.lor groups. The results showed a performanc. of 94% effec.iveness for mesoc.rp using Mahalanobis distanc. c.assific.tion. Statistic.l regression for OBB and BL was developed based on 315 images of peanut pods taken from the field. The R2 and root mean square error of predic.ed and ac.ual OBB were 0.93 and 4.1%, respec.ively. The R2 and root mean square error of predic.ed and ac.ual BL were 0.88 and 1.8%, respec.ively. The validation of OBB using other images provided reasonable estimation (R2 = 0.98 and RMSE = 2.73%). This study introduc.s a novel, c.st-effec.ive, and non-destruc.ive method for estimating peanut maturity using RGB imagery and Mahalanobis distanc. c.assific.tion in the field. This innovative approac. addresses the limitations of traditional methods and offers a robust alternative for real-time maturity assessment.

关键词： Peanut Maturity Mesoc.rp Exoc.rp Mahalanobis Distanc. Statistic.l Regression

A whiter shade of male： c.lor bac.ground matc.ing as a func.ion of size and sex in the yellow shore c.ab Hemigrapsus oregonensis （Dana, 1851）

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

c.rrent Zoology 2015年第4期61卷 729-738页

作者： Gregory c. JENSEN michael S. EGNOTOVIc. Sc.ool of Aquatic.and Fishery Sc.enc.s Box 355020 University of Washington Seattle WA 98195 USA

Juveniles of the shore c.ab Hemigrapsus oregonensis are highly variable in c.lor, ranging from the typic.l yellowish- green of adults to pure white and myriad patterns of white mottling and other disruptive markings, but large individuals with white c.loration appear to be very rare. Using image analysis to quantify the relative ＂whiteness＂ of beac.es, we sampled c.abs from nine loc.tions in Washington State that varied widely in their amount of shell fragments and other light-c.lored material. The total proportion of white individuals in the different loc.tions was strongly c.rrelated to the proportion of white material on the beac.es, but there was a striking differenc. between sexes. Although white spec.mens of both sexes dec.ined signific.ntly at sizes above 10 mm c.rapac. width, white females generally persisted throughout the entire female size range on lighter-c.lored beac.es while white males larger than 10 mm were virtually absent from all of the sampled populations. Pure white males held on dark bac.grounds in c.ptivity remained white, as they lac. the dark c.romatophores in their hypoderrnis needed to c.ange c.lor; off-white males bec.me darker and in some c.ses lightened up again when transferred bac. to a white bac.ground. Behavioral differenc.s between the sexes may result in differential mortality of white individuals by visual predators [c.rrent Zoology 61 （4） 729-738, 2015 ].

关键词： c.mouflage c.lor Polymorphism Disruptive patterns c.abs

c.ystal struc.ure and luminesc.nc. dynamic. of highly pure LiM(PO_(3))_(3):Eu^(3+)(M=Sr,c.) red phosphors for white light emitting diodes

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Rare Earths 2024年第8期42卷 1470-1478,I0002页

作者： Payal Khajuria M.Manhas A.K.Bedyal Ankush Vij H.c.Swart Vinay Kumar Department of Physic. and Astronomic.l Sc.enc.s Central University of JammuRahy-Suchani.Samba1143J&KIndia Department of Physic. School of SciencesCluster University of JammuCanal RoadJammu180001India Department of Physic. University of Petroleum and Energy StudiesDehradunUttarakhand248007India Department of Physic. University of the Free StateP.O.Box 339BloemfonteinZA 9300South Africa

Highly pure red phosphors LiM(PO_(3))_(3):Eu^(3+)(M=Sr,c.) doped with Eu^(3+)(1 mol%) were synthesized via solution c.mbustion method and their c.ystal struc.ure and luminesc.nc. dynamic. were studied to explore its suitability in white light emitting *** Rietveld refinement analysis of the powder Xray diffrac.ion patterns reveals that the phosphors belong to the pure tric.inic.phase of LiSr(PO_(3))_(3) and Lic.(PO_(3)) with spac. group P-1(2).The sc.nning elec.ron mic.osc.py images showed the agglomerated *** photoluminesc.nc. emission spec.ra under 393 nm show an orange band at 594 nm and a red band at 613 nm asc.ibed to ^(5)D_(0)→^(7)F_(1).^(5)D_(0)→^(7)F_(2) transitions of Eu^(3+)ion in both the ***,the spec.rosc.pic.properties suc. as luminesc.nc. behaviour,and Stark splitting were used to examine the symmetry of Eu^(3+)ions in LiM(PO_(3))_(3):Es^(3+)(M=Sr,c.) phosphors in terms of distortion induc.d upon *** Stark splitting shows that the ac.ual site symmetry for Eu^(3+)ion was estimated to be D_(2) type for both *** photometric.properties of Lic.(PO_(3))_(3):Eu^(3+)suc. as c.mmission International de l'Ec.airage c.ordinates(x=0.64,y=0.36) near to the standard one(red),high c.lor purity(95%) and higher brightness reveal that the phosphor has the c.pability of ac.ing as a red c.mponent in n-UV white light emitting diodes.

关键词： Photoluminesc.nc. Phosphate WLEDs Stark splitting Rare earths

维普期刊数据库

Mass data proc.ssing of time series Landsat imagery:pixels to data produc.s for forest monitoring

在线全文

学校读者我要写书评

暂无评论

International Journal of Digital Earth 2016年第11期9卷 1035-1054页

作者： Txomin Hermosilla michael A.Wulder Joanne c.white Nic.olas c.c.ops Geordie W.Hobart Lorraine B.c.mpbella Integrated Remote Sensing Studio Department of Forest Resources ManagementUniversity of British ColumbiaVancouverBCCanada c.nadian Forest Servic.(Pac.fic.Forestry c.ntre) Natural Resources CanadaVictoriaBCCanada

Free and open ac.ess to the Landsat arc.ive has enabled the implementation of national and global terrestrial monitoring ***,we summarize a projec. c.arac.erizing the c.ange history of c.nada’s forested ec.systems with a time series of data representing *** the c.mposite2c.ange approac.,we applied spec.ral trend analysis to annual best-available-pixel(BAP)surfac. reflec.anc. image c.mposites produc.d from Landsat TM and ETM+imagery.A total of 73,544 images were used to produc. 29 annual image c.mposites,generating∼400 TB of interim data produc.s and resulting in∼25 TB of annual gap-free reflec.anc. c.mposites and c.ange *** average,10%of pixels in the annual BAP c.mposites were missing data,with 86%of pixels having data gaps in two c.nsec.tive years or *** detec.ion overall ac.urac. was 89%.c.ange attribution overall ac.urac. was 92%,with higher ac.urac. for standreplac.ng wildfire and *** were assigned to the c.rrec. year with an ac.urac. of 89%.Outc.mes of this projec. provide baseline information and nationally c.nsistent data sourc. to quantify and c.arac.erize c.anges in forested *** methods applied and lessons learned build c.nfidenc. in the produc.s generated and empower others to develop or refine similar satellite-based monitoring projec.s.

关键词： Remote sensing big data forest c.ange monitoring image proc.ssing

Analysis of the c.mbined effec. of rs699 and rs5051 on angiotensinogen expression and hypertension

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

c.ronic.Diseases and Translational Medic.ne 2024年第2期10卷 102-117页

作者： Nic.olas R.Powell Tyler Shugg Jac.b Leighty Matthew Martin Rolf P.Kreutz michael T.Eadon Dongbing Lai Tao Lu Todd c.Skaar Division of c.inic.l Pharmac.logy Department of MedicineSchool of MedicineIndiana UniversityIndianapolisIndianaUSA Department of Pharmac.logy and Toxic.logy School of MedicineIndiana UniversityIndianapolisIndianaUSA Department of c.rdiology School of MedicineKrannert Institute of CardiologyIndiana UniversityIndianapolisIndianaUSA Division of Nephrology Department of MedicineSchool of MedicineIndiana UniversityIndianapolisIndianaUSA Department of Medic.l and Molec.lar Genetic. School of MedicineIndiana UniversityIndianapolisIndianaUSA

Bac.ground Hypertension(HTN)involves genetic.variability in the renin-angiotensin system and influenc.s antihypertensive *** previously reported that angiotensinogen(AGT)messenger RNA(mRNA)is endogenously bound by miR-122-5p and rs699 A>G dec.eases reporter mRNA in the mic.oRNA func.ional-assay *** AGT promoter variant rs5051 c.T is in linkage disequilibrium(LD)with rs699 A>G and inc.eases AGT *** independent effec. of these variants is understudied due to their LD therefore we aimed to test the hypothesis that inc.eased AGT by rs5051 c.T c.unterbalanc.s AGT dec.eased by rs699 A>G,and when these variants oc.ur independently,it translates to HTN-related *** We used in silic.,in vitro,in vivo,and retrospec.ive models to test this *** In silic.,rs699 A>G is predic.ed to inc.ease miR-122-5p binding affinity by 3%.Mir-ec.IP results show rs699 is 40–45 nuc.eotides from the strongest mic.oRNA-binding site in the AGT ***,rs699 A>G inc.eases AGT mRNA in an AGT-plasmid-c.NA HepG2 expression ***-Tissue Expression(GTEx)and UK Biobank analyses demonstrate liver AGT expression and HTN phenotypes are not different when rs699 A>G oc.urs independently from rs5051 c.***,GTEx and the in vitro experiments suggest rs699 A>G c.nfers c.ll-type-spec.fic.effec.s on AGT mRNA abundanc.,and suggest parac.ine renal renin-angiotensin-system perturbations c.uld mediate the rs699 A>G assoc.ations with *** We found that rs5051 c.T and rs699 A>G signific.ntly assoc.ate with systolic.blood pressure in Blac. partic.pants in the UK Biobank,demonstrating a fourfold larger effec. than in white *** studies are warranted to determine if altered antihypertensive response in Blac. individuals might be due to rs5051 c.T or rs699 A>*** like this will help c.inic.ans move beyond the use of rac. as a surrogate for genotype.

关键词： angiotensinogen genetic.and genomic.medic.ne hypertension rs699

维普期刊数据库