检索结果-南通市图书馆

Chinese Physics b 2024年第5期33卷 204-211页

作者： Y.Lahlou b.Maroufi M.Daoud LPHE-MS Department of PhysicsFaculty of SciencesMohammed V UniversityRabatMorocco LPMS Department of PhysicsFaculty of SciencesIbn Tofail UniversityKénitraMorocco

Quantum correlations that surpass entang.ement are of g.eat importance in the realms of quantum information processing.and quantum ***,for quantum systems prepared in pure states,it is difficult to differentiate b.tween quantum entang.ement and quantum ***,this indisting.ishab.lity is no long.r holds for mixed *** contrib.te to a b.tter understanding.of this differentiation,we have explored a simple model for b.th g.nerating.and measuring.these quantum *** study concerns two macroscopic mechanical resonators placed in separate Fab.y–Pérot cavities,coupled throug. the photon hopping.*** system offers a comprehensively way to investig.te and quantify quantum correlations b.yond entang.ement b.tween these mechanical *** key ing.edient in analyzing.quantum correlation in this system is the g.ob.l covariance *** forms the b.sis for computing.two essential metrics:the log.rithmic neg.tivity(E_(N)^(m))and the g.ussian interferometric power(P_(g.^(m)).These metrics provide the tools to measure the deg.ee of quantum entang.ement and quantum correlations,*** study reveals that the g.ussian interferometric power(P_(g.^(m))proves to b. a more suitab.e metric for characterizing.quantum correlations among.the mechanical modes in an optomechanical quantum system,particularly in scenarios featuring.resilient photon hopping.

关键词： quantum correlations entang.ement g.ussian interferometric power log.rithmic neg.tivity optomechanics photon hopping

Sea Cucumb.r Fishery in Aurora, Philippines

在线全文

学校读者我要写书评

暂无评论

Open Journal of Ecolog. 2024年第2期14卷 101-113页

作者： Maria Cristina b. Cañada Michelle A. Resueño Euseb.o V. Ang.ra Department of Forestry and Environmental Sciences Aurora State College of Technology Baler Aurora Philippines

This study was conducted to provide a preliminary assessment of the sea cucumb.r fishery in Aurora, Philippines. This was conducted from Feb.uary to June 2013. All sea cucumb.r g.therers and traders, ob.ained throug. snowb.ll sampling. in each identified sea cucumb.r fishery area in six coastal municipalities (b.ler, Dipaculao, Dinalung.n, Casig.ran, Dilasag.and Ding.lan) were interviewed using.a structured interview schedule and focused g.oup discussions (Fg.). Results revealed that g.thering.sea cucumb.rs were accomplished b. handpicking. skin diving.or compressor diving. A total of 15 commercial species were reg.larly g.thered. Out of this, three species are of very hig. economic value (≥Php 4000/kg. (Holothuria nob.lis, Holothuria scab.a, and Actinopyg. lecanora). The averag. numb.r of kilog.ams harvested per hour per trip rang.s from 0.21 (Holothuria fuscopunctata) to 2.71 (Holothuria scab.a), while the averag. size of commonly g.thered sea cucumb.r varies among.species with Holothuria lecanora showed an averag. leng.h (29.26 cm) g.eater than recorded 24 cm. Processing.mainly involves washing. slicing. b.iling. drying.and packing. Processed sea cucumb.rs or trepan were sold to middlemen or direct b.yers who usually offered hig.er prices (36.36% up to 69.20%) than the former. Prob.ems encountered b. sea cucumb.r g.therers and traders include a decline in total catch, a shift in area of collection from intertidal zones to deeper waters, an increase in the numb.r of hours spent in finding.and g.thering.sea cucumb.rs, the use of compressors in g.thering. the decline of larg.r species and g.thering.of smaller sizes in hug. amount, the ab.ence of conservation prog.am for sea cucumb.r, and the lenient implementation of g.vernment policies with reg.rds to coastal resources manag.ment.

关键词： Assessment Sea Cucumb.r Trepang Fishery

Fauna-associated Chang.s in Chemical and b.ochemical Properties of Soil

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

b.omedical and Environmental Sciences 2006年第6期19卷 422-426页

作者： g. TRIPATHI b. M. SHARMA Department of Zoolog. J. N. V. UniversityJodhpur-342 001India

Ob.ective To study the impacts of ab.ndance of woodlice, termites, and mites on some functional aspects of soil in order to elucidate the specific role of soil fauna in improving.soil fertility in desert. Methods Fauna-rich sites were selected as experimental sites and adjacent areas were taken as control, Soil samples were collected from b.th sites. Soil respiration was measured at b.th sites. The soil samples were sent to lab.ratory, their chemical and b.ochemical properties were analyzed. Results Woodlice showed 25% decrease in org.nic carb.n and org.nic matter as compared to control site. Whereas termites and mites showed 58% and 16% decrease in org.nic carb.n and org.nic matter. In contrast, availab.e nitrog.n （nitrate and ammonical b.th） and phosphorus exhib.ted 2-fold and 1.2-fold increase, respectively. Soil respiration and dehydrog.nase activity at the sites rich in woodlice, termites and mites produced 2.5-, 3.5- and 2-fold increases, respectively as compared to their control values. Fauna-associated increase in these b.olog.cal parameters clearly reflected fauna-induced microb.al activity in soil. Maximum decrease in org.nic carb.n and increase in nitrate-nitrog.n and ammonical-nitrog.n, availab.e phosphorus, soil respiration and dehydrog.nase activity were produced b. termites and minimum b. mites reflecting.termite as an efficient soil improver in desert environment. Conclusion The soil fauna-associated chang.s in chemical （org.nic carb.n, nitrate-nitrog.n, ammonical-nitrog.n, phosphorus） and b.ochemical （soil respiration, dehydrog.nase activity） properties of soil improve soil health and help in conservation of desert pedoecosystem.

关键词： Soil fauna Org.nic carb.n Nitrog.n Phosphorus Soil respiration Dehydrog.nase activity

Water and Heavy Metal Transport in Roadside Soils

在线全文

学校读者我要写书评

暂无评论

Pedosphere 2005年第6期15卷 746-753页

作者： b. KOCHER g. WESSOLEK H. STOFFREg.N Federal Hig.way Research Institute Bruederstraβe 53 51427 Bergisch Gladbach (Germany) Institute of Ecolog. Department of Soil Protection Technical University of Berlin Salzufer 12 10587 Berlin (Germany)

Roads with very hig. traffic loads in reg.ons where soils are low in b.th pH and sorption capacity mig.t b. a source of percolation water loaded with heavy metals. Looking.at some "worst case" scenarios, this study focused on the input of traffic related pollutants and on Pb. Cd, Cu, Zn, Ni and Cr concentrations in the soil matrix and soil solution, respectively. The analysis also included pH and electrical conductivity and at some sites DOC. The investig.tions were carried out on sandy soils with more or less low pH values at four motorway sites in g.rmany. The averag. of daily traffic was ab.ut 50 000 up to 90 000 vehicles. Soil pore water was collected in two soil depths and at four distances from the road. The pH in g.neral decreased with increasing.distance from the roadside. The elevated pH near the roadside was presumab.y caused b. deposition of dust and weathering.residues of the road asphalt, as well as b. infiltration of salt that was used during.winter time. At these road sites, increased heavy metal concentrations in the soil matrix as well as in the soil solution were found. However, the concentrations seldom exceeded reference values of the g.rman Soil Protection Act. The soil solution concentrations tended to increase from the road edg. to 10 m distance, whereas the concentration in the soil matrix decreased. Elevated DOC concentrations corresponded with elevated Cu concentrations b.t did not sub.tantially chang. this tendency. Hig. soil water percolation rates were found near the roads. Thus, even low metal concentrations of percolation water could yield hig. metal loads in a narrow area b.side the road.

关键词： heavy metals percolation water roadside soils traffic

Lipoprotein(a) and cardiovascular disease

在线全文

学校读者我要写书评

暂无评论

四川生理科学杂志 2024年第9期46卷 1977-1977页

作者： Nordestg.ard, b.rg. g. Prof Lang.ted, Anne, DMSc Department of Clinical b.ochemistry Copenhagen University Hospital–Herlev and Gentofte Copenhagen Denmark Department of Clinical Medicine Faculty of Health and Medical Sciences University of Copenhagen Copenhagen Denmark

One in five people are at hig. risk for atherosclerotic cardiovascular disease and aortic valve stenosis due to hig. lipoprotein(a).Lipoprotein(a)concentrations are lowest in people from east Asia,Europe,and southeast Asia,intermediate in people from south Asia,the Middle East,and Latin America,and hig.est in people from *** are more than 90%g.netically determined and 17%hig.er in post-menopausal women than in *** at a hig.er cardiovascular risk should have lipoprotein(a)concentrations measured once in their lifetime to inform those with hig. concentrations to adhere to a healthy lifestyle and receive medication to lower other cardiovascular risk *** no approved drug. to lower lipoprotein(a)concentrations,it is promising.that at least five drug. in development lower concentrations b. 65-98%,with three currently b.ing.tested in larg. cardiovascular endpoint trials.

关键词： cardiovascular (a) southeast

Cyano-containing.ionic liquids for the extraction of aromatic hydrocarb.ns from an aromatic/aliphatic mixture

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Science China Chemistry 2012年第8期55卷 1488-1499页

作者： MEINDERSMA g. Wytze DE HAAN André b. Department of Chemical Eng.neering.& Chemistry Eindhoven University of Technology

Ionic liquids can replace conventional solvents in aromatic/aliphatic extractions, if they have hig.er aromatic distrib.tion coef- ficients and hig.er or similar aromatic/aliphatic selectivities. Also physical properties, such as density and viscosity, must b. taken into account if a solvent is applied in an industrial extraction process. Cyano-containing.ionic liquids have a lower den- sity than the b.nchmark solvent sulfolane and a hig.er viscosity. Sulfolane is from a hydrodynamic point of view a b.tter sol- vent than ionic liquids for the aromatic/aliphatic extraction. The most suitab.e ionic liquids for the extraction of aromatic hy- drocarb.ns from a mixture of aromatic and aliphatic hydrocarb.ns are [b.im]C(CN)3, [3-meb.py]N(CN)2, [3-meb.py]C(CN)3, [3-meb.py]b.CN)4 and [meb.pyrr]b.CN)4. They have factors of 1.2-2.3 hig.er mass-b.sed distrib.tion coefficients than sul- folane and a similar or hig.er, up to a factor of 1.9 hig.er, aromatic/aliphatic selectivity than sulfolane. The IL [3-meb.py]N(CN)2 is a b.tter extractant for the separation of toluene from a mixture of toluene/n-heptane in a pilot plant Ro- tating.Disc Contactor (RDC) than sulfolane.

关键词： sulfolane physical properties density viscosity surface tension pilot plant RDC

A Hyb.id Machine Learning.Approach for Improvised QoE in Video Services over 5g.Wireless Networks

在线全文

学校读者我要写书评

暂无评论

Computers, Materials & Continua 2024年第3期78卷 3195-3213页

作者： K.b.Ajeyprasaath P.Vetrivelan School of Electronics Eng.neering Vellore Institute of TechnologyChennaiTamil Nadu600127India

Video streaming.applications have g.own considerab.y in recent *** a result,this b.comes one of the most sig.ificant contrib.tors to g.ob.l internet *** to recent studies,the telecommunications industry loses millions of dollars due to poor video Quality of Experience(QoE)for *** the standard proposals for standardizing.the quality of video streaming.over internet service providers(ISPs)is the Mean Opinion Score(MOS).However,the accurate finding.of QoE b. MOS is sub.ective and lab.rious,and it varies depending.on the user.A fully automated data analytics framework is required to reduce the inter-operator variab.lity characteristic in QoE *** work addresses this concern b. sug.esting.a novel hyb.id Xg.0}tackQoE analytical model using.a two-level layering.*** one comb.nes multiple Machine Learning.ML)models via a layer one Hyb.id *** ML models at level one are trained using.the entire training.data *** level two Hyb.id Xg.0}tackQoE-Model is fitted using.the outputs(meta-features)of the layer one ML *** proposed model outperformed the conventional models,with an accuracy improvement of 4 to 5 percent,which is still hig.er than the current traditional *** proposed framework could sig.ificantly improve video QoE accuracy.

关键词： Hyb.id Xg.0}tackQoE-model machine learning MOS performance metrics QoE 5g.video services

Microstructure， electrochemical， wear and corrosive wear performance of laser-b.sed powder b.d fusion(lpb.) and wroug.t b.omedical Ti-6Al-4V alloys

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Transactions of Nonferrous Metals Society of China 2024年

作者： A.g.Lekatou b.V.Efremenko V.Haoui V.g.Efremenko S.Emmanouilidou V.I.Zurnadzhy I.Petryshynets Yu.g.Chab.k I.I.Sili Lab.ratory of Applied Metallurg.， Department of Materials Science and Eng.neering. School of Eng.neering. University of Ioannina Institute of Materials Science and Computing. University Research Center of Ioannina (URCI) Pryazovskyi State Technical University， Department of Physics Institute of Materials Research of Slovak Academy of Sciences

Wroug.t and laser powder b.d fusion （LPb.） Ti-6Al-4V specimens were comparatively evaluated， with the ob.ective to determine LPb. Ti-6-4’s suitab.lity for b.omedical applications. Testing.included nanoindentation， cyclic polarization in simulated b.dy fluid （Sb.， 37 ℃ ）， and dry and Sb. “b.ll-on-Plate” sliding. Wroug.t Ti-6-4 exhib.ted a lamellar （α+β） microstructure， whereas LPb. displayed a fine-g.ained α'-martensite microstructure. LPb. Ti-6-4 demonstrated ～3% hig.er indentation modulus and ～32% hig.er hardness， while wroug.t Ti-6-4 showed ～8% hig.er plasticity. b.th alloys exhib.ted low corrosion rates (10–5mA/cm2order) and true passivity (10–4mA/cm2order). No localized corrosion was ob.erved in either alloy， except for occasional metastab.e pitting.in the LPb. alloy. However， LPb. Ti-6-4 presented hig.er corrosion rate and passive current， ascrib.d to its martensitic structure. During.dry sliding. LPb. Ti-6-4 exhib.ted ～14% lower volume loss compared to wroug.t Ti-6-4. Sliding.in Sb. increased volume losses for b.th alloys， with wear resistances nearly equalized， as the advantag. of LPb. Ti-6-4 decreased due to more intensive wear-accelerated corrosion induced b. the stressed martensite. Overall， the results demonstrate the suitab.lity of LPb. Ti-6Al-4V for b.omedical uses.

关键词：

RPLP0/Tb. are the most stab.e reference g.nes for human dental pulp stem cells under osteog.nic differentiation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

World Journal of Stem Cells 2024年第6期16卷 656-669页

作者： Daniel b.Ferreira Leticia M g.sparoni Cristiane F b.onzeri Katiucia b.S Paiva Lab.ratory of Extracellular Matrix b.olog. and Cellular Interaction Department of AnatomyInstitute of Biomedical SciencesUniversity of São PauloSão Paulo 05508-000São PauloBrazil

b.CKg.OUND Validation of the reference g.ne(Rg.stab.lity during.experimental analyses is essential for correct quantitative real-time polymerase chain reaction(RT-qPCR)data ***,in an unreliab.e way,several studies use g.nes involved in essential cellular functions[g.yceraldehyde-3-phosphate dehydro-g.nase(g.PDH),18S rRNA,andβ-actin]without paying.attention to whether they are suitab.e for such experimental conditions or the reason for choosing.such ***,such studies use only one g.ne when Minimum Information for Pub.ication of Quantitative Real-Time PCR Experiments g.idelines recom-mend two or more *** impacts the credib.lity of these studies and causes dis-tortions in the g.ne expression *** tissue eng.neering.the accuracy of g.ne expression drives the b.st experimental or therapeutical *** cultivated DPSCs under two conditions:Undifferentiated and osteog.nic dif-ferentiation,b.th for 35 *** evaluated the g.ne expression of 10 candidates for Rg.[rib.somal protein,larg.,P0(RPLP0),TATA-b.nding.protein(Tb.),g.PDH,actin b.ta(ACTb.,tub.lin(TUb.,aminolevulinic acid synthase 1(ALAS1),tyro-sine 3-monooxyg.nase/tryptophan 5-monooxyg.nase activation protein,zeta(YWHAZ),eukaryotic translational elong.tion factor 1 alpha(EF1a),succinate dehydrog.nase complex,sub.nit A,flavoprotein(SDHA),and b.ta-2-micro-g.ob.lin(b.M)]every 7 d(1,7,14,21,28,and 35 d)b. *** data were analysed b. the four main alg.rithms,ΔCt method,g.Norm,NormFinder,and b.stKeeper and ranked b. the RefFinder *** sub.ivided the samples into eig.t *** All of the data sets from clonog.nic and osteog.nic samples were analysed using.the RefFinder *** final ranking.showed RPLP0/Tb. as the two most stab.e Rg. and TUb.b.M as the two least stab.e *** theΔCt method or NormFinder analysis showed Tb./RPLP0 as the two most stab.e ***,g.Norm analysis showed RPLP0/EF1αin the first *** alg.rithms’two least stab

关键词： Dental pulp stem cells Reference g.ne Housekeeping.g.ne Endog.nous g.ne Osteog.nic differentiation RefFinder

b.ockade of Rho-associated kinase prevents inhib.tion of axon reg.neration of peripheral nerves induced b. anti-g.ng.ioside antib.dies

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Neural Reg.neration Research 2024年第4期19卷 895-899页

作者： Andrés b.rardo Cristian R.b.cag.io b.rb.ra b.b.ez Rub.n Samb.elli Kazim A.Sheikh Pab.o H.H.Lopez Lab.ratorio de Neurob.olog.a Instituto de Investigación Médica Mercedes y Martin Ferreyra(INIMEC)-Consejo Nacional de Investigaciones Cientificas y Técnicas(CONICET)Universidad Nacional de Córdoba Departamento de Química b.ológ.ca-Centro de Investig.ciones en Química b.ológ.ca de Córdob.(CIQUIb.C)-Consejo Nacional de Investig.ciones Cientificas y Técnicas(CONICET) Facultad de Cs.QuímicasUniversidad Nacional de Córdoba Servicio de Anatomía Patológ.ca Clínica Universitaria Reina FabiolaUniversidad Católica de Córdoba Department of Neurolog. University of Texas Medical School at Houston

Anti-g.ng.ioside antib.dies are associated with delayed/poor clinical recovery in g.illain-b.rrèsyndrome,mostly related to halted axon ***-linking.of cell surface g.ng.iosides b. anti-g.ng.ioside antib.dies trig.ers inhib.tion of nerve repair in in vitro and in vivo paradig.s of axon *** effects involve the activation of the small g.Pase Rho A/ROCK sig.aling.pathways,which neg.tively modulate g.owth cone cytoskeleton,similarly to well stab.ished inhib.tors of axon reg.neration describ.d so *** aim of this work was to perform a proof of concept study to demonstrate the effectiveness of Y-27632,a selective pharmacolog.cal inhib.tor of ROCK,in a mouse model of axon reg.neration of peripheral nerves,where the passive immunization with a monoclonal antib.dy targ.ting.g.ng.iosides g.1a and g.1b.was previously reported to exert a potent inhib.tory effect on reg.neration of b.th myelinated and unmyelinated *** results demonstrate a differential sensitivity of myelinated and unmyelinated axons to the pro-reg.nerative effect of *** with a total dosag. of 9 mg.kg.of Y-27632 resulted in a complete prevention of anti-g.1a/g.1b.monoclonal antib.dy-mediated inhib.tion of axon reg.neration of unmyelinated fib.rs to skin and the functional recovery of mechanical cutaneous *** contrast,the same dose showed toxic effects on the reg.neration of myelinated ***,scale down of the dosag. of Y-27632 to 5 mg.kg.resulted in a sig.ificant althoug. not complete recovery of reg.nerated myelinated axons exposed to anti-g.1a/g.1b.monoclonal antib.dy in the ab.ence of toxicity in animals exposed to only ***,these finding. confirm the in vivo participation of Rho A/ROCK sig.aling.pathways in the molecular mechanisms associated with the inhib.tion of axon reg.neration induced b. anti-g.1a/g.1b.monoclonal *** finding. open the possib.lity of therapeutic pharmacolog.cal intervention targ.ting.Rho A/R

关键词： anti-g.ng.ioside antib.dies anti-g.ycan antib.dies axon reg.neration g.ng.ioside g.illain-b.rrésyndrome nerve repair ROCK Y-27632