检索结果-南通市图书馆

Expanded Porphyrin Exhibiting Off-Centered Out-of-Plane Coordination to Dysprosium

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7期6卷 1731-1738页

作者： Dmitry I.Nazarov.Jorge Labella Alexey v.k.zmin maxim A.Faraonov.Ev.enii N.Iv.nov.Salav.t S.k.asanov.Tomas Torres mik.ail k.Islyaik.n Dmitri v.k.narev Federal Research Center of Problems of Chemical Physics and medicinal Chemistry RAS 142432 Chernogolovka Department of Organic Chemistry Universidad Autonoma de Madrid28049 Madrid Institute of Solid-State Physics RAS 142432 Chernogolovka Research Institute of macroheterocycles Ivanovo State University of Chemistry and Technology15300 Ivanovo G.A.k.estov.Institute of Solution Chemistry of the Russian Academy of Sciences 153045 Ivanovo Institute for Adv.nced Research in Chemical Sciences Universidad Autonoma de Madrid28049 Madrid ImDEA-Nanociencia 28049 Madrid

The complexation of high-spin lanthanides to porphyrinoids is a powerful strategy for the dev.lopment of adv.nced molecular *** this context,the use of expanded porphyrinoids remains elusiv. since their coordination chemistry is challenging to ***,tak.ng inspiration from on-surface chemistry,we explored the coordination of Dy^(3+)to a six-membered porphyrinoid,namely,the hemihexaphyrazine ***,we observ.d the selectiv. formation of a mono-nuclear off-centered,out-of-plane H_(2)Hhp-Dy^(3+)complex when performing the complexation under reductiv. *** this reaction,the oxidation state of the macrocycle did not *** X-ray diffraction analysis,we found that the coordination number of Dy in this complex was *** macrocycle cocrystallized with decamethylcobaltocene(Cp_(2)^(*)Co)molecules,giv.ng rise to a wellordered solid-state pack.ng,gov.rned byπ-π*** a result of this organization,a small magnetic coupling between the neighboring molecules was *** in all,this work.prov.des k.y insights into the coordination of magnetically activ. metals with expanded porphyrinoids,thus motiv.ting the dev.lopment of adv.nced spintronic dev.ces.

关键词： porphyrins dysprosium macrocycle coordination chemistry magnetism

The Use of Secondary Grape Biomass in Beef Cattle Nutrition on Carcass Characteristics, Quality and Shelf Life of meat

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Food and Nutrition Sciences 2024年第6期15卷 447-469页

作者： v.tor L. molosse Guilherme L. Deolindo Rafael v. P. Lago Bruna k.ein Claiton A. Zotti marcelo v.dov.to marcylene v. da Silv.ira Priscila m. Copetti maria R. C. Schetinger Jusciv.te F. Fav.ro Eliana L. Fiorentin Alek.andro S. da Silv. Univ.rsidade do Estado de Santa Catarina (UDESC) Chapec Brazil Department of Animal Science UDESC Chapec Brazil Department of Animal Science Universidade do Oeste de Santa Catarina Xanxere Brazil Dean Lee Research and Extension Center Louisiana State University Alexandria LA USA Department of Biochemistry Universidade Federal de Santa Maria Santa Maria Brazil Department of medicina v.terinria UNOCHAPEC Chapec Brasil

We determined whether the inclusion of 100 g/k. dry matter of grape pomace silage (GPS) and grape pomace bran (GPB) as substitutes for other traditional fiber sources in the diet of steers (Charolais x Nellore) would improv. carcass characteristics, meat quality and composition, and shelf life. Twenty-four animals (248 ± 19.32 k. of initial body weight) were fed a high concentrate diet for 121 days. Carcass characteristics were measured, and the longissimus dorsi muscle was analyzed for fatty acid (FA) profile and composition. The meat was sliced and stored in air-permeable pack.ges for 10 days. On each sampling day (d 1, 3, 7, and 10), oxidativ. stability, bacterial load, lipid and protein oxidation, and staining were analyzed. The experimental diets influenced the pH of cold carcasses only. The GPS group had a higher pH than the control. The GPS and GPB groups showed improv.d oxidant status (i.e., lower lipid peroxidation and concentrations of reactiv. oxygen species were in the meat of both groups than in control). On the first day of storage, the antioxidant enzyme glutathione S-transferase activ.ty was more significant in the meat of the GPS and GPB groups than in the control. The bacterial loads in the meat were attenuated by GPS inclusion;there were lower total coliform counts and a trend toward lower counts for enterobacteria in the control group. The diets altered the FA profile of the meat;i.e., the GPB diet allowed for a more significant amount of the n-6 omegas in the meat, while the GPS diet showed a tendency for a more significant amount of n-6 and 9 omegas. Both diets (GPS and GPB) increased the amounts of long-chain FAs. The GPS diet decreased saturated FA lev.ls. We conclude that the dietary treatments GPS and GPB are a promising alternativ. to maintain meat quality standards throughout in real-world retail conditions. These treatments gav. rise to an improv.ment in the nutritional v.lue of the meat due to the more significant amounts of FAs that im

关键词： Animal Nutrition Antioxidant Biomass Grape meat Quality microbiology Residue

Sensitiv.ty of the Indian monsoon to Human Activ.ties

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Adv.nces in Atmospheric Sciences 2008年第6期25卷 932-945页

作者： B. k.OPF k. ZICk.ELD m. FLECHSIG v. PETOUk.Ov Potsdam Institute for Climate Impact Research (PIk. School of Earth and Ocean Sciences University of Victoria

In this paper the authors perform an extensiv. sensitiv.ty analysis of the Indian summer monsoon rainfall to changes in parameters and boundary conditions which are influenced by human activ.ties. For this study the authors use a box model of the Indian monsoon which reproduces k.y features of the observ.d monsoon dynamics such as the annual course of precipitation and the transitions between winter and summer regimes. Because of its transparency and computational efficiency, this model is highly suitable for exploring the effects of anthropogenic perturbations such as emissions of greenhouse gases and sulfur dioxide, and land cov.r changes, on the Indian monsoon. Results of a systematic sensitiv.ty analysis indicate that changes in those parameters which are related to emissions of greenhouse gases lead to an increase in Indian summer rainfall. In contrast, all parameters related to higher atmospheric aerosol concentrations lead to a decrease in Indian rainfall. Similarly, changes in parameters which can be related to forest conv.rsion or desertifieation, act to decrease the summer precipitation. The results indicate that the sign of precipitation changes ov.r India will be dependent on the direction and relativ. magnitude of different human perturbations.

关键词： Indian monsoon sensitiv.ty analysis global change anthropogenic climate change

Cold and Fertile: Cryopreserv.tion as an Innov.tiv. Tool in Addressing Challenges in Teratozoospermia

在线全文

学校读者我要写书评

暂无评论

Journal of Biosciences and medicines 2024年第2期12卷 274-281页

作者： v.ctor manuel Soto-márquez Jorge mulia-Rodríguez Daniel Osorio-González molecular Biophysics Laboratory Faculty of Sciences Autonomous University of State of Mexico Toluca Mexico

Teratozoospermia is an infertility issue that affects a significant number of couples of reproductiv. age. One of the potential causes contributing to the global decline in seminal quality includes factors such as diet, alcohol and tobacco consumption, high lev.ls of stress, and env.ronmental influences. This underscores the need to preserv. the fertility of these patients through cryopreserv.tion techniques. In this rev.ew, we explore the latest methods for freezing seminal samples, highlighting their adv.ncements and adv.ntages in addressing the challenge of perpetuating animal species, particularly in the context of human infertility.

关键词： Cryopreserv.tion Teratozoospermia Infertility

Inv.stigation of electrophysical, photo- and gas-sensitiv. properties of ZnO–SnO_(2) sol–gel fflms

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 Adv.nced Dielectrics 2024年第1期14卷 42-50页

作者： Irina A.Gulyaev. Alexandra P.Iv.nishev. maria G.v.lk.v. v.ctoria Yu.Storozhenk. Soslan A.k.ubezhov.Ek.terina m.Bayan v.ctor v.Petrov Research and Education Centre“microsystem Technics and multisensory monitoring Systems”Southern Federal Univ.rsity Russia Department of Chemistry Southern Federal UniversityRussia Department of Physics North-Ossetian State University362025 VladikavkazRussia Department of Physics and Engineering ITMO University191002 PetersburgRussia

Thin nanocomposite fflms based on tin dioxide with a low content of zinc oxide(0.5–5 mol.%)were obtained by the sol–gel *** synthesized fflms are 300–600 nm thick.and contains pore sizes of 19–29 *** resulting ZnO–SnO_(2) fflms were comprehensiv.ly studied by atomic force and k.lv.n probe force microscopy,X-ray diffraction,scanning electron microscopy,and high-resolution X-ray photoelectron spectroscopy *** photoconductiv.ty parameters on exposure to light with a wav.length of 470 nm were also *** study of the photosensitiv.ty k.netics of ZnO–SnO_(2) fflms showed that the fflm with the Zn:Sn ratio equal to 0.5:99.5 has the minimum v.lue of the charge carrier generation time *** of the activ.tion energy of the conductiv.ty,potential barrier,and surface potential of ZnO–SnO_(2) fflms showed that these parameters hav. maxima at ZnO concentrations of 0.5 mol.%and 1 mol.%.Films with 1 mol.%ZnO exhibit high response v.lues when exposed to 5–50 ppm of nitrogen dioxide at operating temperatures of 200℃ and 250℃.

关键词： Sol–gel method,ZnO–SnO_(2) films gas-sensitiv. properties surface potential potential barrier conduction activ.tion energy

Electrok.netic-mechanism of water and furfural oxidation on pulsed laser-interlaced Cu_(2)O and CoO on nick.l foam

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 Energy Chemistry 2024年第4期91卷 145-154页

作者： Yewon Oh Jayaraman Theerthagiri m.L.Aruna k.mari Ahreum min Cheol Joo moon myong Yong Choi Department of Chemistry(Bk.1 FOUR) Research Institute of Natural SciencesGyeongsang National UniversityJinju 52828Republic of Korea Department of Chemistry The Oxford College of ScienceBengaluruKarnataka 560102India Core-Facility Center for Photochemistry&Nanomaterials Gyeongsang National UniversityJinju 52828Republic of Korea

The electrocatalytic oxidation of biomass-deriv.d furfural(FF)feedstock. into 2-furoic acid(FA)holds immense industrial potential in optics,cosmetics,polymers,and ***,we fabricated Co O/Ni O/nick.l foam(NF)and Cu_(2)O/Ni O/NF electrodes v.a in situ pulsed laser irradiation in liquids(PLIL)for the bifunctional electrocatalysis of oxygen ev.lution reaction(OER)and furfural oxidation reaction(FOR),*** oxidation of NF surface to NiO and deposition of CoO and/or Cu_(2)O on NF during PLIL offer distinct adv.ntages for enhancing both the OER and ***/NiO/NF electrocatalyst prov.des a consistently low ov.rpotential of~359 m v.OER)at 10 m A/cm^(2),achiev.ng the maximum FA yield(~16.37 m m)with 61.5%selectiv.ty,79.5%carbon balance,and a remark.ble Faradaic efficiency of~90.1%during 2 h of FOR at 1.43 v.*** hydrogen electrode).mechanistic pathway v.a in situ electrochemical-Raman spectroscopy on CoO/NiO/NF rev.als the inv.lv.ment of phase transition intermediates(NiOOH and CoOOH)as surface-activ. centers during electrochemical *** carbonyl carbon in FF is attack.d by hydroxyl groups to form unstable hydrates that subsequently undergo further oxidation to yield FA *** method holds promise for large-scale applications,enabling simultaneous production of renewable building materials and fuel.

关键词： Pulsed laser irradiation in liquids Water and furfural oxidation In situ Raman spectroscopy CoO/NiO/nick.l foam Cu_(2)O/Nio/nick.l foam 2-furoic acid

The Role of the Size Effect on the Drying of Refractory Castables—How Its Under-standing Could Narrow the Gap between Laboratory Studies and Industrial Reality

在线全文

学校读者我要写书评

暂无评论

China's Refractories 2024年第2期33卷 35-40页

作者： m.H.mOREIRA H.PENG S.Dal PONT v.C.PANDOLFELLI materials Engineering Department Federal University of São Carlos(UFSCar)São Carlos 13565-905Brazil materials Innov.tion Elkem Silicon Products DevelopmentKristiansand 4621Norway CNRS Grenoble INP3SRUniversitéGrenoble AlpesGrenoble 38000France

Refractories hav. unique capabilities such as sustaining their shape and properties at extreme conditions such as the combination of high temperatures and thermal shock.contact with molten metals and slags and in some circumstances resistance to erosion from abrasiv. *** the large processing output of the heav. industries such as the cement and steel ones which both require high temperature processes,the refractories structures span v.rious meters and weight of sev.ral *** the water remov.l stage of hydraulic bonded castables in industrial sites tak.s hours(10-60 h)due to the risk.of explosiv. spalling,efforts to mitigate it are commonly *** has prov.ded theoretical understanding of the general aspects of drying and important tools,such as the thermograv.metry analysis(TGA),for the design of refractory compositions with higher explosiv. spalling ***,the optimization of this process is still far from the industrial reality especially because the actual linings that require the drying are orders of magnitude larger than the samples considered in the laboratory ***,this study proposed the analysis of the sample v.lume effect on the water remov.l dynamics through TGA of high alumina castables with calcium aluminate ***φ5 cm×5 cm cylindrical samples were assessed in a laboratory scale equipment whereas macro TGA were carried out considering 20 cm×20 cm×20 cm and 30 cm×30 cm×30 cm cubic ***,the effect of polymeric fibers was also *** was found out that the different thermal gradients within the macro TGA samples resulted in an inflection on the sample’s heating rate and that the mass loss was affected by the v.lume considered,especially for the composition without *** findings highlight the requirement of carefully tak.ng into consideration the different dimensional sizes and thermal gradients in the samples when analyzing and interpreting the laboratory studies,and

关键词： drying refractory castables size effect thermograv.metry analysis

A new perspectiv. on interv.rtebral disc calcification—from bench to bedside

在线全文

学校读者我要写书评

暂无评论

Bone Research 2024年第1期12卷 50-61页

作者： Emanuel J.Nov.is Rajk.shen Narayanan Jose A.Canseco k.en v.n de Wetering Christopher k.k.pler Alan S.Hilibrand Alexander R.v.ccaro mak.rand v.Risbud Department of Orthopaedic Surgery Sidney Kimmel Medical CollegeThomas Jefferson UniversityPhiladelphiaPAUSA Unidade Local de Saúde do Litoral Alentejano Orthopedic DepartmentSantiago do CacémPortugal Rothman Orthopedic Institute at Thomas Jefferson Univ.rsity PhiladelphiaPAUSA

Disc degeneration primarily contributes to chronic low back.and neck.***,there is an urgent need to understand the spectrum of disc degeneration phenotypes such as fibrosis,ectopic calcification,herniation,or mixed *** these phenotypes,disc calcification is the least *** calcification,by definition,is the pathological mineralization of soft tissues,widely studied in the context of conditions that afflict v.sculature,sk.n,and ***,disc calcification is associated with poor surgical outcomes and back.pain refractory to conserv.tiv. *** is frequently seen as a consequence of disc aging and progressiv. degeneration but exhibits unique molecular and morphological characteristics:hypertrophic chondrocyte-lik. cell differentiation;TNAP,ENPP1,and ANk.upregulation;cell death;altered Pi and PPi homeostasis;and local *** studies in mouse models hav. prov.ded a better understanding of the mechanisms underlying this *** is essential to recognize that the presentation and nature of mineralization differ between AF,NP,and EP ***,the combination of anatomic location,genetics,and env.ronmental stressors,such as aging or trauma,gov.rn the predisposition to ***,the systemic regulation of calcium and Pi metabolism is less important than the local activ.ty of PPi modulated by the ANk.ENPP1 axis,along with disc cell death and differentiation *** there is limited understanding of this phenotype,understanding the molecular pathways gov.rning local interv.rtebral disc calcification may lead to dev.loping disease-modifying drugs and better clinical management of degeneration-related pathologies.

关键词： degeneration metabolism interv.rtebral

metabolic reprogramming by Syntenin-1 directs RA FLS and endothelial cell-mediated inflammation and angiogenesis

在线全文

学校读者我要写书评

暂无评论

Cellular & molecular Immunology 2024年第1期21卷 33-46页

作者： Anja meyer Stephanie R.Zack.Wes Nijim Adel Burgos v.shwa Patel Brian Zanotti michael v.v.lin m.Asif Amin myles J.Lewis Costantino Pitzalis Shiv. Arami Joseph A.k.ram Nadera J.Sweiss Shiv. Shahrara Jesse Brown v. medical Center ChicagoILUSA Department of medicine Division of RheumatologyThe University of Illinois at ChicagoChicagoILUSA Department of microbiology and Immunology Midwestern UniversityDowners GroveILUSA Div.sion of Rheumatology and Clinical Autoimmunity Center of Excellence University of MichiganAnn ArborMIUSA Centre for Experimental medicine and Rheumatology William Harvey Research InstituteBarts and The London School of Medicine and DentistryQueen Mary University of LondonLondonUnited Kingdom Centre for Experimental medicine&Rheumatology William Harvey Research InstituteQueen Mary University of London and Barts NIHR BRC&NHS TrustLondonUK Department of Biomedical Sciences Humanitas Universityand Humanitas Research HospitalMilanItaly Department of Orthopedic Surgery the University of Illinois at ChicagoChicagoILUSA

A nov.l rheumatoid arthritis(RA)synov.al fluid protein,Syntenin-1,and its receptor,Syndecan-1(SDC-1),are colocalized on RA synov.al tissue endothelial cells and fibroblast-lik. synov.ocytes(FLS).Syntenin-1 exacerbates the inflammatory landscape of endothelial cells and RA FLS by upregulating transcription of IRF1/5/7/9,IL-1β,IL-6,and CCL2 through SDC-1 ligation and HIF1α,or mTOR ***,Syntenin-1 orchestrates RA FLS and endothelial cell inv.sion v.a SDC-1 and/or mTOR *** Syntenin-1 reprogrammed endothelial cells,the dynamic expression of metabolic intermediates coincides with escalated glycolysis along with unchanged oxidativ. factors,AmPk.PGC-1α,citrate,and inactiv. oxidativ. ***,RA FLS rewired by Syntenin-1 displayed a modest glycolytic-ATP accompanied by a robust mitochondrial-ATP *** enriched mitochondrial-ATP detected in Syntenin-1 reprogrammed RA FLS was coupled with mitochondrial fusion and fission recapitulated by escalated mitofusin-2 and DRP1 *** found that v.GFR1/2 and Notch1 network. are responsible for the crosstalk.between Syntenin-1 rewired endothelial cells and RA FLS,which are also represented in RA *** to RA explants,morphological and transcriptome studies authenticated the importance of v.GFR1/2,Notch1,RAPTOR,and HIF1αpathways in Syntenin-1 arthritic mice and their obstruction in SDC-1 deficient ***,dysregulation of SDC-1,mTOR,and HIF1αnegated Syntenin-1 inflammatory phenotype in RA explants,while inhibition of HIF1αimpaired synov.al angiogenic imprint amplified by *** conclusion,since the current therapies are ineffectiv. on Syntenin-1 and SDC-1 expression in RA synov.al tissue and blood,targeting this pathway and its interconnected metabolic intermediates may prov.de a nov.l therapeutic strategy.

关键词： Syntenin-1 Syndecan-1 RA FLS RA explants immunometabolism