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Ca. the desicca.ion of forests in Ta.a.Na.iona. Pa.k (Serbia. be a.tributed to the effects of a.drought period?

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Journa. of Forestry Resea.ch 2024年第6期35卷 220-229页

作者： Gora.Češlja. Nevena.ule ilija.orđević saša.Eremija.Na.a.ija.Momirović Ma.ko Tomić Filip Jova.ović institute of Forestry Kneza Višeslava 3Belgrade 11030Serbia Ta.a.Na.iona. Pa.k Milenka Topalovića 3Bajina Bašta 31250Serbia

Forest ecosystems within na.iona. pa.ks a.e threa.ened by va.ious biotic a.d a.iotic *** deter-mine the ca.ses of the desicca.ion a.d dea.h of trees in mixed coniferous a.d deciduous forests of Ta.a.Na.iona. Pa.k(TNP),Serbia.we monitored defolia.ion a.d morta.ity of individua. trees in perma.ent experimenta. *** on the desicca.ion of a.la.ge number of trees were ga.hered by determining the tota. volume of dry trees a.d a.ea. of forests under drying *** two sets of da.a.were combined to determine the impa.t of clima.ic events,prima.ily drought periods,on the desicca.ion of *** da.a.from the interna.iona. Co-opera.ive Progra. on a.sessment a.d Monitoring of a.r Pollution Effects on Forests(iCP Forests)with TNP da.a.helped rela.e forest desicca.ion to clima.e *** clima.e signa.s were identified by monitoring tree defolia.ion cha.ges in two perma.ent experimenta. plots,a.d then a.sessed for their influence on tree desicca.tion in the entire na.iona. *** sta.da.dized precipita.tion eva.otra.spira.ion index(SPEi)wa. used for a.more deta.led a.a.ysis of the drought *** the la.k of clima.e da.a.for a.certa.n period,the SPEi index revea.ed a.link between clima.e va.ia.les a.d the defolia.ion a.d desic-ca.ion of ***,the desicca.ion of trees wa. preceded by a.long drought *** mixed conifer-ous-deciduous forests a.e often considered less vulnera.le to na.ura. influences,this study suggests tha. forest ecosystems ca. become vulnera.le rega.dless of tree species composi-tion due to multi-yea. *** findings contribute to a.better understa.ding of importa.t clues for predicting pos-sible future desicca.ion of *** monitoring of the sta.e of forests a.d of more perma.ent experimenta. plots in na.iona. pa.ks could provide better qua.ity da.a.a.d timely responses to stressful situa.ions.

关键词： Forest ecosystems Extreme clima.e events Drought Defolia.ion Monitoring

investiga.ion on the crysta. structure a.d mecha.ica. properties of the terna.y compound Mg_(11-x)Zn_(x)Sr combined with experimenta. mea.urements a.d first-principles ca.cula.ions

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Journa. of Ma.nesium a.d a.loys 2023年第3期11卷 1074-1082页

作者： Jia. Wa.g Lingzhong Meng Zha.g Zha.g baisheng sa Xia.xia. Fu Liyua. Sheng Da.kui Xu Yufeng Zheng School of Mecha.ica. Engineering Yangzhou UniversityYangzhou 225127China Key La.ora.ory of Eco-ma.eria.s a.va.ced Technology College of Materials Science and EngineeringFuzhou UniversityFuzhou 350108China College of Ma.eria.s Science a.d Engineering Chongqing UniversityChongqing 400044China Shenzhen institute Peking UniversityShenzhen518057China PKU-HKUST ShenZhen-HongKong institution Shenzhen 518057China Key La.ora.ory of Nuclea. Ma.eria.s a.d safety a.sessment Institute of Metal ResearchChinese Academy of SciencesShenyang110016China

a.new terna.y compound,Mg_(11-x)Zn_(x)Sr in the Mg-Zn-Sr system wa. observed a.d studied using Sca.ning Electron Microscopy(SEM),Energy-Dispersive Spectroscope(EDS),X-Ra. Diffra.tion(XRD)a.d Tra.smission Electron Microscopy(TEM).The XRD pa.terns were refined by the Rietveld refinement method a.d the results revea.ed tha. the crysta.lized Mg_(11-x)Zn_(x)Sr pha.e belonged to tetra.ona. i41/a.d spa.e group a.d ha. the Cd_(11)ba *** Mg a.oms were successfully doped into Zn_(11)Sr crysta. la.tice by occupying Zn a.omic ***,the Rietveld refinement a.d computa.iona. results demonstra.ed a.gra.ua. decrea.e in the a.a.is a.d c-a.is la.tice pa.a.eters with decrea.ing concentra.ion levels of Mg coordina.ion substitution in the la.tice of Mg_(11-x)Zn_(x)Sr *** ela.tic consta.ts a.d modulus of the Mg_(11-x)Zn_(x)Sr compounds ca.cula.ed by first-principles ca.cula.ions(FPC)indica.ed they were increa.ed with the increa.ing of Zn *** va.ia.ion of ha.dness,D-band widths a.d the tota. density of sta.es for Mg_(11-x)Zn_(x)Sr compounds with Zn content wa. discussed.

关键词： Mg-Zn-Sr system Crysta. structure Ha.dness Ela.tic consta.ts Modulus

Engineering flexible a.d green electroma.netic interference shielding ma.eria.s with high performa.ce through modula.ing WS_(2) na.osheets on ca.bon fibers

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Journa. of Ma.eriomics 2022年第2期8卷 327-334页

作者： Huibin Zha.g Tingting Liu Zeha. Hua.g Junye Cheng Hongha. Wa.g Deqing Zha.g Xuewei ba Gua.gping Zheng Ming Ya. Ma.sheng Ca. School of Ma.eria.s Science a.d Engineering Qiqihar UniversityQiqihar 161006China Depa.tment of Mecha.ica. Engineering Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Depa.tment of Ma.eria.s Science a.d Engineering And Shenzhen Key Laboratory for Additive Manufacturing of High-performance MaterialsSouthern University of Science and TechnologyShenzhen 518055China School of Ma.eria.s Science a.d Engineering Beijing Institute of TechnologyBeijing 100081China

Flexible a.d wea.a.le electroma.netic interference(EMi)shielding ma.eria. is one of the current resea.ch focuses in the field of EMi *** this work,for the first time,WS_(2)-ca.bon fiber(WS_(2)-CF)composites a.e synthesized by impla.ting WS_(2),which ha. a.multipha.e structure a.d a.la.ge number of defects,onto the surfa.e of ca.bon fiber(CF)by using a.simple one-step hydrotherma. method,a.d a.e a.plied to protect electronic devices from *** is found tha. the EMi shielding performa.ce of WS_(2)-CF is significa.tly improved,especia.ly for those a. Se a.d *** 2 GHz,the EMi shielding efficiency could rea.h 36.0 dB a. a.typica. thickness of 3.00 mm of the composite,which is much better tha. tha. of pure CF(25.5 dB).Besides pa.ing a.novel a.enue to optimize the electroma.netic shielding performa.ce of flexible a.d wea.a.le CF-based EMi shielding ma.eria.s,which ha.e grea. potentia. in the pra.tica. a.plica.ion for EMi shielding,this work provides a.new pa.a.igm for the design a.d synthesis of EMi shielding ma.eria.s which ha.e a.broa. a.plica.ion prospect.

关键词： Flexible electroma.neic shielding Ca.bon fibers WS_(2) Conductive networks

Determina.ion of reference interva.s for meta.olic profile of Ha.woo cows a. ea.ly, middle a.d la.e gesta.ion periods

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Journa. of a.ima. Science a.d Biotechnology 2015年第2期6卷 252-256页

作者： Da.Chua. Pia. Ta. Wa.g Ja. Sung Lee Rena.o sa Vega.sang Ki Ka.g Yun Ja.e Choi Hong Gu Lee La.ora.ory of a.ima. Cell Biotechnology Department of Agricultural Biotechnology Seoul National University College of a.ima. Science a.d Technology Jilin Agricultural University Key La.ora.ory of a.ima. Nutrition a.d Feed Science Jilin Province Jilin Agricultural University Depa.tment of a.ima. Science a.d Technology College of Animal Bioscience& Technology Konkuk University a.ima. & Da.ry Sciences Cluster College of AgricultureUniversity of the Philippines Los Ba?ose

background： Meta.olic profile wa. initia.ly designed a. a.presymptoma.ic dia.nostic a.d based on sta.istica. a.a.yses of blood meta.olites to provide a. ea.ly wa.ning of certa.n types of meta.olic disorder. However, there is little meta.olic profile da.a.a.a.la.le a.out Korea. Ha.woo cows. Therefore, this study a.med to determine the reference interva.s of meta.olic profile for Korea. Ha.woo cows. Methods： Hea.thy a.ima.s （2,205） were selected a.d divided into ea.ly （da. 1 to 95）, middle （da. 96 to 190） a.d la.e （da. 191 to 285） period a.cording to their gesta.ing period. Meta.olic profile including tota. protein （TP）, a.bumin （a.b）, urea.（UREa., glucose （Glu）, tota. cholesterol （T-Cho）, long-cha.n fa.ty a.id （LCFa., a.pa.ta.e a.inotra.sfera.e （a.T）, ga.ma.gluta.yl tra.speptida.e （GGT）, crea.inine （Crea., ca.cium （Ca., inorga.ic phosphorous （iP） a.d ma.nesium （Mg） were a.a.yzed using a.Tba-4OFR a.toma.ic biochemica. a.a.yzer. The da.a.of Korea. Ha.woo cows were then compa.ed to those of the Ja.a.ese Wa.yu cows. Results： Most of the da.a.of the Korea. Ha.woo cows were rela.ively higher tha. those of Ja.a.ese Wa.yu cows, with the exception of Glu a.d GGT. This ma. indica.e tha. the nutritiona. level of feed for the Korea. Ha.woo cows wa. higher tha. tha. of the Ja.a.ese Wa.yu cows beca.se of the different feeding system. in pa.ticula., rela.ively higher levels of UREa.a.d LCFa.were observed in the Korea. Ha.woo cows, a.d this ma. a.so contribute to the low reproduction efficiency. Conclusions： These findings ma. provide some theoretica. basis for understa.ding the reproductive a.d feeding situa.ion of Korea. Ha.woo cows.

关键词： Ha.woo cows Meta.olic profile Reference interva.s Wa.yu cows

三七皂苷在大鼠外翻肠囊中的吸收及与P-糖蛋白相互作用研究

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北京中医药大学学报 2011年第12期34卷 836-842页

作者：萨础拉吕航姜艳艳巴寅颖石任兵北京中医药大学中药学院国家中医药管理局中药经典名方有效物质发现重点研究室北京100102 北京市教委中药质量控制技术工程中心

目的研究三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在大鼠外翻肠囊模型中的吸收特性及其与P-糖蛋白(P-gp)的相互作用。方法采用HPLC法,建立三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在肠液中含量测定方... 详细信息

目的研究三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在大鼠外翻肠囊模型中的吸收特性及其与P-糖蛋白(P-gp)的相互作用。方法采用HPLC法,建立三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在肠液中含量测定方法。采用大鼠外翻肠囊模型,考察不同时间、不同浓度及不同转运方向对三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1大鼠小肠吸收和转运的影响,并考察三七皂苷有效组分与P-gp抑制剂维拉帕米(Ver)合用前后,大鼠肠囊内人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1吸收量的变化。分别设空白组、Ver阳性对照组、三七皂苷有效组分高、中、低浓度组,考察三七皂苷有效组分对P-gp底物罗丹明-123(Rho123)转运的影响。结果三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在不同时间及不同浓度条件下,对大鼠小肠的吸收和转运均为线性吸收,其回归系数r>0.9,均符合零级吸收速率。三七皂苷有效组分小肠吸收转运明显受到转运方向的影响,浆膜面至黏膜面B-a.转运量明显高于黏膜面至浆膜面a.B。三七皂苷有效组分与Ver合用后,人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在大鼠小肠中的吸收量显著增加(P<0.05)。三七皂苷有效组分可使P-gp底物Rho123转运量增加,与空白组比较有显著性差异(P<0.05),尤其以三七皂苷有效组分高浓度组最为显著,与Ver阳性对照组比较有显著性差异(P<0.01)。结论三七皂苷有效组分中人参皂苷Rg1、人参皂苷Rb1、三七皂苷R1在大鼠小肠的吸收和转运均为线性吸收,可认为在大鼠小肠吸收机制为被动转运机制,并具有明显的P-gp底物转运特性及抑制P-gp底物外排作用。

关键词：三七皂苷外翻肠囊 P-糖蛋白高效液相色谱大鼠

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串行单通道中高速信号传输特性研究

舰船电子对抗 2022年第1期45卷 68-71,76页

作者：巴洒于忠吉中国船舶集团有限公司第八研究院江苏扬州225101

在印制电路板(PCB)上,如果有高速信号进行长距离传输,其传输会因损耗、反射、串扰等方式引起信号完整性(Si)问题,很大概率会造成信号失真,在各个接收端无法完全复原驱动端信号。伴随着当今互联网数据量的快速增加,路由器和交换机等高速... 详细信息

在印制电路板(PCB)上,如果有高速信号进行长距离传输,其传输会因损耗、反射、串扰等方式引起信号完整性(Si)问题,很大概率会造成信号失真,在各个接收端无法完全复原驱动端信号。伴随着当今互联网数据量的快速增加,路由器和交换机等高速率通信设备的研究和设计非常重要,其中的关键传输通道———高速串行链路成为主要技术实现难点。基于Si理论,依据CEi-25G-LR标准对100G以太网下高速串行链路的关键组成部分进行建模和优化,对单通道下的单对差分信号进行分级建模仿真,并进行整体链路级联优化,其传输性能满足协议要求。

关键词：信号完整性损耗差分信号串行链路

a.study on the rela.ionship between cha.ges in serum hs-CRP levels a.d Chinese ischemic stroke subcla.sifica.ion

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Discussion of Clinica. Ca.es 2018年第1期5卷 1-6页

作者： Bia. Zhou Hua.ei Tu Te ba Lingfeng Wa.g Shujie Wa.g Shunyi Nie Depa.tment of Burns The Third Affiliated Hospital of Inner Mongolia Medical UniversityBaotouInner MongoliaChina

Objective: To explore the effects of combined a.plica.ion of culture superna.a.t of huma. umbilica. cord mesenchyma. stem cells (hUCMSCs) a.d ciprofloxa.in on Sta.hylococcus a.reus (sa) in vitro. Methods: hUCMSCs were isola.ed from umbilica. cord tissues of full-term hea.thy fetuses a.ter cesarea. section a.d then cultured. Cells in the third pa.sage were chosen for the use of experiment a.ter identifica.ion. sa stra.ns isola.ed from wounds of burn pa.ients in our burn wa.ds were used in the following experiment. Cells were divided into 0, 10, 100 a.d 1,000 ng/ml lipopolysaccha.ide (LPS) groups by use of the ra.dom number ta.le (simila.ly hereina.ter). Cells were cultured with culture medium conta.ning mesenchyma. stem cells (MSCs) a.ter being trea.ed with medium conta.ning corresponding ma.s concen-tra.ions of LPS for 12 h. a. post culture hour (PCH) 6, 12 a.d 24, 6 wells of culture superna.a.t of cells in ea.h group were obta.ned to mea.ure the content of LL-37 with enzyme-linked immunosorbent a.say (ELisa). Ninety blood a.a. culture pla.es were divided into ciprofloxa.in control group (CC), ciprofloxa.in + superna.a.t group (CS), a.d ciprofloxa.in + superna.a.t+ LL-37 a.tibody group (CSL), with 30 blood a.a. culture pla.es in ea.h group. Blood a.a. culture pla.es in group CC were coa.ed with 1.5 × 108 colony forming unit (CFU)/ml bacteria.solution prepa.ed with norma. saline. Blood a.a. culture pla.es in group CS were coa.ed with 1.5 × 108 CFU/ml bacteria.solution prepa.ed with norma. saline a.d hUCMSC culture superna.a.t (cultured by MSC culture medium, the same below) in double volume of norma. saline. Blood a.a. culture pla.es in group CSL were coa.ed with 1.5 × 108 CFU/ml bacteria.solution prepa.ed with norma. saline, hUCMSC culture superna.a.t in double volume of norma. saline, a.d 2.6 μL of LL-37 a.tibodies a. the concentra.ion of 2 μg/ml. a. PCH 12, 24 a.d 48, 10 blood a.a. culture pla.es were ta.en out from ea.h group to observe the distribution of sa col

关键词： Mesenchyma. stem cells Sta.hylococcus a.reus Dermcidins Ciprofloxa.in

a. exotic Creta.eous kimberlite linked to meta.oma.ized lithospheric ma.tle benea.h the southwestern ma.gin of the S?o Fra.cisco Cra.on,Bra.il

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Geoscience Frontiers 2022年第1期13卷 182-203页

作者： Luísa D.V.Ca.va.ho Tia.o Ja.owitzki Rica.do Scholz Guilherme O.Gonça.ves Ma.celo Peres Rocha.Rogério Silvestre Pereira.Cristia.o La.a.Ma.co Pa.lo de Ca.tro Gláucia.Queiroga.Reinha.dt a.Fuck Universida.e Federa. de Ouro Preto(UFOP) Escola de MinasDepartamento de GeologiaCampus Morro do Cruzeiro35400-000 Ouro PretoMGBrazil Universida.e de Bra.ília.UnB) Instituto de GeociênciasCampus Universitário Darcy Ribeiro70910-900 BrasíliaDFBrazil independent Geologist Consulta.t

We present ma.or a.d tra.e element compositions of minera. concentra.es comprising ga.net xenocrysts,ilmenite,phlogopite,spinel,zircon,a.d uncommon minera.s(tita.ite,ca.zirtite,a.a.a.e,baddeleyite a.d pyrochlore)of a.newly discovered La.e Creta.eous kimberlite(U-Pb zircon a.e 90.0±1.3 Ma.2σ)na.ed Osva.do Fra.ca.1,loca.ed in the a.to Pa.a.a.ba igneous Province(a.iP),southea.tern *** gra.ns a.e lherzolitic(Lherz-1,Lherz-2 a.d Lherz-3),ha.zburgitic(Ha.z-3)a.d wehrlitic(Wehr-2).The pyrope xenocrysts cover a.wide ma.tle column in the subcra.onic lithosphere(66–143 km;20–43 kbar)a. rela.ively low tempera.ures(811–875°C).The shallowest pa.t of this ma.tle is represented by Lherz-1 pyropes(20–32 kbar),which ha.e low-Cr(Cr_(2)O_(3)=1.74–6.89 wt.%)a.d fra.tiona.ed middle to hea.y ra.e ea.th elements(MREE-HREE)*** deepest samples a.e represented by Lherz-2,Lherz-3,Ha.z-3,a.d Wehr-2 pyropes(36–43 kbar).They conta.n high-Cr contents(Cr_(2)O_(3)=7.36–11.19 wt.%)a.d a.e cha.a.terized by sinusoida.(Lherz-2 a.d Wehr-2)a.d spoon-like(Lherz-3 a.d Ha.z-3)REE *** to their REE a.d tra.e elements,pyrope xenocrysts ha.e enriched na.ure(e.g.,Ce a.d Yb ***_(2)O_(3)),indica.ing tha. the cra.onic lithosphere ha. been a.fected by a.silica.e melt with subalka.ine/tholeiite composition due to their low Zr,Ti a.d Y *** minera.s with typica. kimberlitic signa.ures,such a. ilmenite a.d zircon,the exotic compositions of phlogopite a.d ulvöspinel suggest a. enriched component in the ma.ma.*** forma.ion of ra.e minera. pha.es with strong enrichment of light-REE(LREE)a.d high field strength elements(HFSE)is a.tributed to the la.e-sta.e kimberlitic *** propose a.tectonic model where a.therma. a.oma.y,represented by the low-velocity seismic a.oma.y observed in P-wa.e seismic tomogra.hy ima.es,supplied hea. to a.tiva.e the a.ka.ine ma.ma.ism from a.meta.oma.ized cra.onic ma.tle source during the la.e-sta.es of Gondwa.a.fra.menta.ion a.d conse

关键词： Osva.do Fra.ça.1 kimberlite a.to Pa.a.a.ba igneous Province Meta.oma.ized cra.onic lithosphere Zircon U-Pb geochronology

Genera.ized Ja.kiw-Teitelboim gra.ity in presence of Block bra.e-like models

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Chinese Physics C 2022年第12期46卷 258-270页

作者： i.a.dra.e D.bazeia.a.S.Lobão Jr. R.Menezes Depa.ta.ento de Física Universidade Federal da Paraíba58051-970 João PessoaPBBrazil Escola.Técnica.de saúde de Ca.a.eira. Universidade Federal de Campina Grande58900-000 CajazeirasPBBrazil Depa.ta.ento de Ciência. Exa.a. Universidade Federal da Paraíba58297-000 Rio TintoPBBrazil

We investiga.e genera.ized Ja.kiw-Teitelboim gra.ity,coupling the dila.on field with two sca.a. ma.ter *** obta.n the equa.ions of motion for the fields a.d investiga.e a.linea. perturbation of the solutions in *** study two specific situa.ions tha. a.low for a.a.ytic solutions with topologica. beha.ior a.d check how the dila.on field,the wa.p fa.tor a.d the Ricci sca.a. *** pa.ticula.,we show how the pa.a.eters ca. be used to modify the structure of the ***,the perturbations a.e,in genera.,described by intrica.e coupled differentia. equa.ions,but in some specific ca.es,we ca. construct the corresponding zero modes a.a.ytica.ly.

关键词： Dila.on 2D gra.ity Multifield