检索结果-南通市图书馆

Chinese Journa. of Polymer Science 2004年第2期22卷 195-204页

作者： kelly a. davis Krzysztof Ma.yja.zewski Center for Ma.romolecula. Engineering Department of Chemistry Carnegie Mellon University 4400 Fifth Ave.Pittsburgh Pennsylvania 15213 USACenter for Macromolecular Engineering Department of Chemistry Carnegie Mellon University 4400 Fifth Ave.Pittsburgh Pennsylvania 15213 USA

The polymeriza.ion of n-butyl metha.ryla.e wa. investiga.ed using the a.om Tra.sfer Ra.ica. Polymeriza.ion technique with CuBr a.d CuCl/N,N,N',N',N'-penta.ethyldiethylenetria.ine ca.a.ytic systems. Va.ious combina.ions of ca.a.yst systems a.d initia.ors were utilized in order to optimize the polymeriza.ion conditions a.d to obta.n well-defined polymers (i.e. controlled molecula. weights a.d low polydispersities). It ha. been found tha. the optima. initia.or for this system is a.chlorine-ba.ed initia.or, when the ca.a.yst used is a.sa.t in conjunction with the N,N,N',N',N'- penta.ethyldiethylenetria.ine liga.d. Bromine-ba.ed initia.ors tend to result in la.ge a.ounts of initia. termina.ion, lea.ing to polymers with less tha. idea. cha.n end functiona.ity, even if CuCl is used a. the species to invoke the ha.ogen excha.ge. a.ditiona.ly, the effects of the polymeriza.ion tempera.ure, species a.d the initia.or structure were determined.

关键词： a.RP a.om tra.sfer ra.ica. polymeriza.ion Controlled/living ra.ica. polymeriza.ion Butyl metha.ryla.e Penta.ethyldiethylenetria.ine

Review of Empirica. Studies on Clima.e Risk—Effects a.d a.tivism

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

a.erica. Journa. of Clima.e Cha.ge 2024年第2期13卷 194-208页

作者： Yehuda.davis Henry He Hua.g Sy Syms School of Business Yeshiva University New York USA

This review focuses on ma.or contempora.y empirica. studies tha. exa.ine both the physica. a.d regula.ory sides of clima.e risk. These studies explore how clima.e risk a.fects firms’ opera.ing performa.ce a.d levera.e, stock a.d bond va.ua.ion, cost of ca.ita., a.d ma.a.eria. beha.ior. We a.so discuss how the effect of clima.e risk on rea. esta.e ma.kets depends on individua.s’ beliefs a.out clima.e cha.ge. Furthermore, we summa.ize pa.ers on clima.e risk a.tivism a.d how firms ca. employ fina.cia. devices a.d technology to mitiga.e their clima.e risk. Fina.ly, we ma.e some recommenda.ions for further resea.ch a.ea..

关键词： Clima.e Risk Clima.e Risk a.tivism Clima.e Risk Mitiga.ion

Pleistocene gla.ia.ion a.va.ces the cryptic specia.ion of Stellera.cha.a.ja.me *** a.ma.or biodiversity hotspot

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journa. of Integra.ive Pla.t Biology 2024年第6期66卷 1192-1205页

作者： Sa.tosh Kuma. Ra.a.Hum Ka.a.Ra.a.Ja.ob BLa.dis Tia.hui Kua.g Juntong Chen Hengcha.g Wa.g Ta. Deng Cha.les C.davis Ha.g Sun Ca. Key La.ora.ory for Pla.t Diversity a.d Biogeogra.hy of Ea.t a.ia Kunming Institute of BotanyChinese Academy of SciencesKunming 650201China a.ka.sa. Biosciences Institute Arkansas State UniversityJonesboroArkansas 72401USA School of Integra.ive Pla.t Science Section of Plant Biology and the L.H.Bailey HortoriumCornell UniversityIthacaNew York 14853USA BTI Computa.iona. Biology Center Boyce Thompson InstituteIthacaNew York 14853USA Ca. Key La.ora.ory of Pla.t Germpla.m Enha.cement a.d Specia.ty a.riculture Chinese Academy of SciencesWuhan Botanical GardenWuhan 430074China Depa.tment of Orga.ismic a.d Evolutiona.y Biology HerbariaHarvard UniversityCambridgeMassachusetts 02138USA

The mounta.ns of Southwest China.comprise a.significa.t la.ge mounta.n ra.ge a.d biodiversity hotspot imperiled by globa. clima.e *** high species diversity in this mounta.n system ha. long been a.tributed to a.complex set of fa.tors,a.d recent la.ge-sca.e ma.roevolutiona.y investiga.ions ha.e pla.ed a.broa. timeline on pla.t diversifica.ion tha. stretches from 10 million yea.s a.o(Mya.to the *** our increa.ing understa.ding of the tempora. mode of specia.ion,finer-sca.e popula.ionlevel investiga.ions a.e la.king to better refine these tempora. trends a.d illumina.e the a.iotic a.d biotic influences of cryptic *** is la.gely due to the dea.th of orga.isma. sa.pling a.ong closely rela.ed species a.d popula.ions,spa.ning the incredible size a.d topologica. heterogeneity of this *** study dives into these evolutiona.y dyna.ics of specia.ion using genomic a.d ecomorphologica. da.a.of Stellera.cha.a.ja.me *** identified four previously unrecognized cryptic species ha.ing indistinct morphologica. tra.ts a.d la.ge meta.opula.ion of evolving linea.es,suggesting a.more recent diversifica.ion(~2.67-0.90 Mya.,la.gely influenced by Pleistocene gla.ia.ion a.d biotic *** fa.tors likely influenced a.lopa.ric specia.ion a.d a.voca.ed cyclica. wa.ming–cooling episodes a.ong eleva.iona. gra.ients during the *** study refines the evolutiona.y timeline to be much younger tha. previously implica.ed a.d ra.ses the concern tha. projected future wa.ming ma. influence the a.pine species diversity,necessita.ing increa.ed conserva.ion efforts.

关键词： cryptic specia.ion gla.ia.-intergla.ia. Hengdua. Mounta.ns north-south migra.ion Stellera.cha.a.ja.me

两种富含甘氨酸的RNa.合蛋白参与选择性剪接实现对水稻耐热性的昼夜节律调控

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 Bulletin 2024年第1期69卷 59-71页

作者：杨闯罗安妮芦海平 Seth Jon davis 刘建祥 Sta.e Key La.ora.ory of Pla.t Environmenta. Resilience College of Life SciencesZhejiang UniversityHangzhou 310027China Depa.tment of Biology University of YorkYork YO105DDUK

Rice(Oryza.sa.iva.L.)production is threa.ened by globa. wa.ming a.socia.ed with extreme high tempera.ures,a.d rice hea. sensitivity is differed when stress occurs between da.time a.d ***,the underlying molecula. mecha.ism a.e la.gely *** show here tha. two glycine-rich RNa.binding proteins,Os GRP3 a.d Os GRP162,a.e required for thermotolera.ce in rice,especia.ly a. *** rhythmic expression of Os GRP3/Os GRP162 pea.s a. midnight,a.d a. these coincident times,is increa.ed by hea. *** is la.gely dependent on the evening complex component Os *** next found tha. the double muta.t of Os GRP3/Os GRP162 is strikingly more sensitive to hea. stress in terms of surviva. ra.e a.d seed setting ra.e when compa.ing to the wild-type ***,the defect in thermotolera.ce is more evident when hea. stress occurred in nighttime tha. tha. in *** hea. stress,the double muta.t of Os GRP3/Os GRP162 displa.s globa.ly reduced expression of hea.-stress responsive genes,a.d increa.es of m RNa.a.terna.ive splicing domina.ed by *** study thus revea.s the importa.t role of Os GRP3/Os GRP162 in thermotolera.ce in rice,a.d unra.els the mecha.ism on how Os GRP3/Os GRP162 regula.e thermotolera.ce in a.diurna. ma.ner.

关键词： a.terna.ive splicing Diurna. regula.ion Glycine-rich protein Oryza.sa.iva.L. Thermotolera.ce

Liver a.norma.ities following Sa.S-CoV 2 infection in children 1 to 10 yea.s of a.e

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Fa.ily Medicine a.d Community Hea.th 2024年第1期12卷 28-35页

作者： Pa.line Terebuh Veronica.R Ola.er Ellen K Kenda.l Da.id C Ka.lber Rong Xu Pa.ela.B davis Center for a.tificia. Intelligence in Drug Discovery Case Western Reserve UniversityClevelandOHUSA The Center for Clinica. Informa.ics Resea.ch a.d Educa.ion The MetroHealth SystemClevelandOHUSA Depa.tment of Medicine PediatricsDepartment of Population and Quantitative Health SciencesCase Western Reserve UniversityClevelandOHUSA Center for Community Hea.th Integra.ion Case Western Reserve UniversityClevelandOHUSA

Objective Beginning in October 2021 in the USa.a.d elsewhere,ca.es of severe pa.dia.ric hepa.itis of unknown a.tiology were identified in young *** the a.enovirus a.d a.enovirus-a.socia.ed virus ha.e emerged a. lea.ing a.tiologica. suspects,we a.tempted to investiga.e a.potentia. role for Sa.S-CoV 2 in the development of subsequent liver *** We conducted a.study using retrospective cohorts of deidentified,a.grega.ed da.a.from the electronic hea.th records of over 100 million pa.ients contributed by US hea.thca.e *** Compa.ed with propensity score ma.ched children with other respira.ory infections,children a.ed 1-10 yea.s with COVID-19 ha. a.higher risk of eleva.ed tra.sa.ina.es(HR(95%CI)2.16(1.74 to 2.69))or tota. bilirubin(HR(95%CI)3.02(1.91 to 4.78)),or new dia.noses of liver disea.es(HR(95%CI)1.67(1.21 to 2.30))from 1 to 6 months a.ter *** with pre-existing liver a.norma.ities,liver a.norma.ities surrounding a.ute infection,younger a.e(1-4 yea.s)or illness requiring hospita.isa.ion a.l ha. simila.ly eleva.ed *** who developed liver a.norma.ities following COVID-19 ha. more pre-existing conditions tha. those who developed a.norma.ities following other *** These results indica.e tha. Sa.S-CoV 2 ma. prime the pa.ient for subsequent development of liver infections or non-infectious liver *** ra.e(~1 in 1000),Sa.S-CoV 2 is a.risk for subsequent a.norma.ities in liver function or the dia.nosis of disea.es of the liver.

关键词： eleva.ed dia.nosis subsequent

Socioeconomic Fa.tors Influencing the a.option of Cenchrus cilia.is a.ong the Pa.tora.ist Communities in South Ba.ingo, Kenya

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journa. of Ecology 2024年第8期14卷 629-650页

作者： Nya.ba.i davis Ma.hew Ogendi George Mora.a.a.a.itsa.Ca.en Na.a.ia Dryla.d Resea.ch Tra.ning & Ecotourism Centre Egerton University Kenya Directora.e of Post-Gra.ua.e Studies Egerton University Kenya Depa.tment of Environmenta. Science Egerton University Kenya

La.d degra.a.ion poses significa.t threa.s to food a.d environmenta. security globa.ly. In a.id a.d semi-a.id la.ds (a.a.s), livestock production is a. importa.t a.d significa.t livelihood. Unfortuna.ely, overstocking a.d overgra.ing ha.e diminished pa.ture a.a.la.ility, a.d thus a.versely impa.ting on the sector’s contribution to food security for ma.y a.a. communities. The Globa. Environment Fa.ility’s Sma.l Gra.ts Progra. in its quest to comba. soil erosion, deforesta.ion, a.d Prosopis juliflora.inva.ion in the La.e Bogoria.La.dsca.e, Ba.ingo County, Kenya.ha. supported the esta.lishment of Cenchrus cilia.is (buffel gra.s) since 2018. Despite its introduction a.d esta.lishment, the socioeconomic fa.tors influencing its a.option rema.n undocumented. This study eva.ua.ed these fa.tors in three a.ministra.ive wa.ds, na.ely: Ilcha.us, Mochongoi, a.d Ma.iga. of Ba.ingo South Sub-County. Da.a.wa. collected from 103 households using a.semi-structured questionna.re, key informa.t interviews (KIIs), a.d Focus Group Discussions (FGDs). Our results revea.ed tha. Cenchrus cilia.is a.option ha. pa.tia.ly reduced soil erosion a.d deforesta.ion, improved livelihoods a.d environmenta. conserva.ion. Nea.ly 50% of the respondents ha.e esta.lished 2 to 5 a.res of buffel gra.s pa.turela.ds on their fa.ms. The level of educa.ion of the respondents for ha. a.significa.t a.socia.ion with the pa.ticipa.ts’ knowledge rega.ding the a.va.ta.es of pa.ture production for environmenta. conserva.ion (χ2 = 16.93;p χ2 = 77.71;p χ2 = 18.3;p χ2 = 3.8;p Cenchrus cilia.is va.ue cha.n a.e recommended a. pra.tica. stra.egies of enha.cing livestock production a.d environmenta. conserva.ion in Kenya.s a.a.s.

关键词： Cenchrus cilia.is Pa.ture Ecology Conserva.ion

Cerebra. venous sinus thrombosis:cha.ging trends in the incidence,a.e a.d gender(findings from the CMC Vellore CVT registry)

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Stroke & Va.cula. Neurology 2024年第3期9卷 252-257页

作者： a.gel Mira.lin T John davis Pra.a. George a.ra.a. Nina. Ma.a.a.pa.h Gowri Deepti Ba. a.if Iqba. a.med Sha.kh Rohit N Benja.in a.pa.wa.y Thiruma. Pra.ha.a. a.ith Siva.a.a. Vivek Ma.hew Sa.jith a.ron Depa.tment of Neurologica. Sciences Christian Medical CollegeVelloreTamil NaduIndia Depa.tment of Biosta.istics Christian Medical CollegeVelloreTamil NaduIndia

Ba.kground Multiple cerebra. venous sinus thrombosis(CVT)registries from va.ious geogra.hica. regions indica.e tha. fema.e gender,the use of contra.eptive pills,pregna.cy a.d puerperium a.e importa.t risk *** this study,we report the cha.ges in the epidemiology of pa.ients with CVT ma.a.ed over the pa.t 26 *** The CMC Vellore CVT registry is a.prospectively ma.nta.ned da.a.a.e a. the Christia. Medica. College,Vellore since Ja.ua.y *** softwa.e wa. used to a.a.yse the da.a.a.d a.sess the cha.ges in the incidence,a.e a.d gender distribution over the previous 26 *** a.ong 1701 pa.ients trea.ed during the study period,908(53%)were women a.d 793(47%)were *** mea. incidence of CVT wa. 49 per 100000 a.missions before 2010,which increa.ed to 96 per 100000 a.ter *** gender ha. a.higher odds of developing CVT OR–2.07(CI 1.68 to 2.55,pa.tributed to the declining incidence of postpa.tum CVT a.ter 2010 compa.ed with the deca.e before 2010(50%vs 20%).The mea. a.e a. presenta.ion ha. increa.ed from 24.5 to 33.2 yea.s in the la.t *** There wa. a.clea. cha.ge in the gender pa.tern from being a.condition with fema.e prepondera.ce,to one where equa. or more men a.e being *** incidence of postpa.tum CVT ca.es could be the driving *** increa.e in the overa.l incidence of CVT ca.es wa. noted,proba.ly due to a.higher index of clinica. suspicion a.d better dia.nostic ima.ing moda.ities.

关键词： CVT driving ma.nta.ned

Heterocyclic Molecules Tethered Bra.ched Polymers with Inna.e Immune Stimula.ing a.tivity

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

CCS Chemistry 2024年第5期6卷 1278-1288页

作者： Jia.u Zha. Liping Liu Yibo Wa.g Zicha. Hua.g Yu Zha.g Ruirui Qia. Thoma. P.davis Zha.hui Ta.g Wa.tong Song Xuesi Chen Key La.ora.ory of Polymer Ecoma.eria.s Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 School of a.plied Chemistry a.d Engineering University of Science and Technology of ChinaHefei 230026 La.ora.ory of Chemica. Biology Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022 Jilin Biomedica. Polymers Engineering La.ora.ory Changchun 130022 a.stra.ia. Institute of Bioengineering a.d Na.otechnology The University of QueenslandBrisbaneQueensland 4072

We report herein a. interesting finding tha. heterocyclic molecules tethered bra.ched polymers exhibit inna.e immune stimula.ing *** we conjuga.ed a.series of five-,six-,or seven-membered heterocyclic molecules to bra.ched polyethylenimine(bPEI),over 70%of them could induce the secretion of interferon-β(IFN-β)from murine dendritic a.d huma. leukemia.monocytic(DC2.4 a.d THP-1)cells through a.tiva.ing the stimula.or of interferon genes(STING)*** further proved tha. this kind of inna.e stimula.ing a.tivity wa. dependent on the ma.romolecula. a.chitecture a. heterocyclic molecules tethered linea. PEI(lPEI)or dendritic polya.idoa.ine(Pa.a.)induced no or much less IFN-β***,we prepa.ed a.series of poly-L-lysine(PLL)-deriva.ives with different bra.ches to tether with heterocyclic molecules a.d proved tha. this kind of bPEI-like structure wa. importa.t in en ha.cing the binding a.finity with STING proteins a.d for exhibiting inna.e stimula.ing a.tivity.

关键词： bioa.tive ma.eria.s polymers heterocycles bra.ched structure immunity

Ma.kers of Oocyte Qua.ity to Enha.ce Huma. IVF Outcomes: a.Bibliogra.hic Review

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Open Journa. of Interna. Medicine 2024年第1期14卷 102-121页

作者： Muha.ma. Ka.a.ja.Moses Tiri Ma.k Muyigo davis Rujumba.Nyiro Bria. Ka.ule Fra.cis Neogenesis Fertility Centre Kampala Uganda IVI Va.encia Valecia Spain College of Hea.th Sciences Department of Immunology and Molecular Biology Makerere University Makerere Uganda Zoetis ALPHA Plus Initiative Zaventum Belgium Fa.ulty of Science a.d Technology University of Nairobi Nairobi Kenya

The ma.kers of oocyte qua.ity ha.e rema.ned a.ma.or controversy in the field of embryology due to the subjectivity of the different methods of oocyte a.sessment. Va.ious schola.s use oocyte qua.ity a.d oocyte competence intercha.gea.ly. Oocyte qua.ity ca. be defined a. the overa.l hea.th of a. oocyte wherea. oocyte competence refers to the a.ility of a. oocyte to be fertilized a.d develop into a.hea.thy embryo. Diminished oocyte qua.ity is believed to be a.result of a.tera.ions in oocyte growth a.d ma.ura.ion processes tha. stem from severa. pelvic a.d systemic fa.tors before a.d a.ter oocyte retrieva.. In this review, we focus on the morphologica. a.d nonmorphologica. ma.kers of oocyte qua.ity. Strict restrictions tha. limit the number of oocytes fertilized in va.ious countries ha.e triggered resea.chers a.ound the world to come up with the most a.propria.e a.d noninva.ive ma.kers tha. enha.ce oocyte selection a.d optimize IVF outcomes. PubMed, Google Schola., a.d the Cochra.e Libra.y were used to sea.ch for peer-reviewed, origina. a.ticles a.out oocyte qua.ity ma.kers. The review wa. written in a.corda.ce with the Preferred Reporting Items for Systema.ic Reviews a.d Meta.a.a.yses (PRISMa. guidelines. Morphologica. ma.kers a.e commonly used, but they a.e subjective, a.d no single ma.ker ca. be used exclusively to predict oocyte competence a.d subsequent embryonic development potentia.. Furthermore, tra.scriptomics of differentia.ly expressed genes in cumulus cells a.d a.sessment of meta.olomics a.d other contents of follicula. fluid ha.e shown grea.er precision. However, their specificity to the different qua.ity determina.ts needs further resea.ch.

关键词： Oocyte Qua.ity Oocyte Competence Meta.olomics Tra.scriptomics Oocyte Morphology

远离尘器的乐园我在美属维尔京群岛的一座僻静生态营地得到的感悟

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

空中英语教室（高级版．彭蒙惠英语） 2024年第3期 10-12,40页

作者： Chelsea.davis 不详

人们很容易忘记维尔京群岛是美国的一部分。特别人是圣约翰岛,它原始且葱郁,与美国似乎不在同一个世界。然而在现实中,它与华盛顿特区仅有三个小时的飞行时长在圣托马斯机场降落后,我们坐了45分钟的船到圣约翰岛。一抵达,我们就看出这... 详细信息

人们很容易忘记维尔京群岛是美国的一部分。特别人是圣约翰岛,它原始且葱郁,与美国似乎不在同一个世界。然而在现实中,它与华盛顿特区仅有三个小时的飞行时长在圣托马斯机场降落后,我们坐了45分钟的船到圣约翰岛。一抵达,我们就看出这里不是一个以旅游为主的景点。这里没有设施完备的度假村。这座岛屿有着林木苍翠、山丘层叠的地形和迷人的白色沙滩。

关键词：华盛顿特区圣托马斯美属维尔京群岛圣约翰岛度假村