检索结果-南通市图书馆

维普期刊数据库

Endophytic occupat.o. in Nodules of Rhynchosia Plants from Semiarid Regions of Argentina

在线全文

学校读者我要写书评

暂无评论

Phyton-Internat.o.al Journal of Experimental Botany 2024年第6期93卷 1081-1099页

作者： Cinthia t.Lucero María de los Á.Ruíz Fabiola Pagliero Carolina Castaño Mariela L.Ambrosino Graciela S.Lorda Facultad de Ciencias Exactas y Naturales Universidad Nacional de La PampaRuta Nacional 35km 330Santa RosaLa PampaCP6300Argentina INtA EEA Anguil“Ing.Agr.Guillermo Covas”Ruta Nacional 5 km 580AnguilLa PampaCC116326Argentina

Beneﬁcial microbes can improve soil health by promoting soil structure,nutrient cycling,and disease *** addit.o.,a wide array of rhizospheric microbes are responsible for producing metabolically active compounds including various types of plant growth ***,microbial biodiversity studies could contribute to the improvement.o. agricultural practices in deprived areas,such as the Pampean semiarid *** vast majority of studies conducted on endophytic microorganisms have focused on intensive crop legume *** contrast,little attent.o. has been paid to microorganisms of native legumes,whose ecology is not directly affected by human *** this study,endophytic microorganisms isolated from root nodules of a selected native legume of the genus Rhynchosia were *** isolates were studied with a focus on their plant growth-pro-moting rhizobacteria(PGPR)*** the edaphic characteristics of the Pampean semiarid region,the isolates obtained were evaluated for their ability to grow under three salt stress condit.o.s(50,100,and 200 mM NaCl)and four different pH values(6,7,8,and 9).Based on their PGPR activities,the selected strains were phylogenetically grouped using *** results showed great variability among the isolates in terms of the characteristics *** legumes manifested a wide endophytic variability and remarkable perfor-mance in PGPR *** conclude that they could be used as potential bioinoculants for legume cultivat.o.,an excellent alternative to the use of chemical fertilizers that currently pollute the environment.

关键词： Native strains endophytes PGPR native legumes stress

Valorizat.o. of tree Bark-Derived Suberin in Applicat.o.s for the Bio-Based Composites Industry–A Recent 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

Journal of Renewable Materials 2024年第6期12卷 1029-1042页

作者： Aleksandra Jeżo Institute of Wood Sciences and Furniture SGGWNowoursynowska St.159Warsaw02-776Poland

Bark extracts are sustainable sources of biopolymers and hold great promise for replacing fossil fuel-based polymers,for example,in wood-based *** addit.o. to primary and secondary metabolites,tree bark also contains suberin,which plays a major role in protecting the tree from environmental *** is a natural aliphatic-aromatic cross-linked polyester present in the cell walls of both normal and damaged external tissues,the main component.o. which are long-chain aliphatic *** main role as a plant ingredient is to protect against microbiological factors and water *** of the most important suberin monomers are suberin fatty acids,known for their hydrophobic and barrier ***,due to the diverse chemical composit.o. of suberin,it is an attractive alternative to hydrocarbon-based *** its potential is recognized,it is not widely used in biocomposites technology,including wood-based composites and the polymer *** article will discuss the current knowledge about the potential of suberin and its components in biocomposites technology,which will include surface finishes,composite adhesives and polymer blends.

关键词： Suberin suberinic acids wood composites biocomposites biopolyester

Late ordovician Mass Extinct.o.: Earth, fire and ice

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nat.o.al Science Review 2024年第1期11卷 51-65页

作者： David A.t.Harper Palaeoecosystems Group Department of Earth SciencesDurham University

the Late ordovician Mass Extinct.o. was the earliest.o. the ‘big’ five extinct.o. events and the earliest to affect the trajectory of metazoan life. t.o.phases have been identified near the start.o. the Hirnantian period and in the middle. It was a massive taxonomic extinct.o., a weak phylogenetic extinct.o. and a relatively benign ecological extinct.o.. A rapid cooling, triggering a major ice age that reduced the temperature of surface waters, prompted a drop in sea level of some 100 m and int.o.uced toxic bot.o. waters onto the shelves. these symptoms of more fundamental planetary processes have been associated with a range of factors with an underlying driver identified as volcanicity. Volcanic erupt.o.s, and other products, may have extended back in time to at least the Sandbian and early Katian, suggesting the extinct.o.s were more protracted and influential than hitherto documented.

关键词： ordovician LoME paleoecology palaeobiogeography biotas

Preparat.o. of microparticles and nanoparticles using membrane-assisted dispersion,micromixing,and evaporat.o. processes

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Particuology 2024年第1期84卷 30-44页

作者： Goran t.Vladisavljevic Chemical Engineering Department Loughborough UniversityLoughboroughLeicestershire LE113TUUnited Kingdom

Synthetic microporous membranes are increasingly used for energy-efficient and cont.o.led product.o. of micro-and nanoparticles and micro-and nanoemulsions with tuneable morphology and physico-chemical properties through various micromixing,emulsificat.o.,and evaporat.o. *** emul-sificat.o. processes,the membrane pores are used for dispersed phase inject.o. and size-cont.o.led generat.o. of droplets and droplet-templated *** micromixing processes,membrane is utilised as a micromixer for mixing t.o.miscible liquids,usually solvent and antisolvent-rich solut.o.s,which leads to the creat.o. of supersaturat.o. and subsequent nanoprecipitat.o. or *** mem-brane evaporat.o. processes,membrane is used to prevent phase dispersion while allowing efficient molecular diffusion of solvent and/or antisolvent vapour through gas-filled *** dispersion processes can be operated continuously by decoupling shear stress on the membrane surface from cross flow using tube insets,flow pulsat.o.s,swirling flow,membrane oscillat.o.s or membrane *** generat.o. and solidificat.o. can be performed continuously in a single pass by connecting membrane module with a downstream *** dispersion processes can be used for pro-duct.o. of nanoparticles such as nanovesicles(liposomes,micelles,et.o.omes,and niosomes),nanogels,polymeric,lipid and metallic nanoparticles,and *** main advantages of membrane-assisted particle generat.o. are in low energy consumpt.o.,cont.o.led geometry and hydrodynamic condit.o.s at the microscale level,flexible throughput due to modular and scalable design of membrane devices,and a wide choice of available microporous membranes with various wall porosities,wetta-bilities,pore sizes,and pore morphologies to suit different applicat.o.s.

关键词： Nanoparticles Microparticles Nanoemulsions Microemulsions Microporous membrane Crystallisat.o. Flash nanoprecipitat.o. Emulsificat.o. Zero liquid discharge

Hepatic grooves:An observat.o.al study at laparoscopic surgery

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

World Journal of Experimental Medicine 2024年第2期14卷 97-102页

作者： Shamir o Cawich Dexter A t.o.as Fawwaz Mohammed Michael t Gardner Marlene Craigie Shaneeta Johnson Ramnanand S Kedambady Department.o. Surgery University of the West IndiesSt Augustine 000000Trinidad and Tobago Department.o. Surgery Port of Spain General HospitalPort of Spain 000000Trinidad and Tobago Sect.o. of Anatomy Basic Medical SciencesUniversity of the West IndiesKingston 000000Jamaica Department.o. Radiology University of the West IndiesKingston 000000Jamaica Department.o. Surgery Morehouse School of MedicineAtlantaGA 30310United States Sect.o. of Anatomy Department of Basic Medical SciencesUniversity of the West IndiesKingston KIN7Jamaica

BACKGRoUND In tradit.o.al descript.o.s,the upper surface of the liver is smooth and convex,but deep depressions are variants that are present in 5%-40%of *** sought to determine the relat.o.ship between surface depressions and the *** to use exploratory laparoscopy to determine the relat.o.ship between surface depressions and the *** An observat.o.al study was performed in all patients undergoing laparoscopic upper gast.o.intestinal operat.o.s between January 1,2023 and January 20,2024.A thirty-degree laparoscope was used to inspect the liver and *** surface depressions were present,we recorded patient demographics,presence of diaphragmatic bands,rib protrusions and/or any other source of compression during *** of 394 patients,343 had normal surface anatomy,and 51(12.9%)had prominent surface depressions on the *** was no significant relat.o.ship between the presence of surface depressions and gender nor the presence of rib ***,there was significant associat.o. between the presence of surface depressions and diaphragmatic muscular bands(PoNCLUSIoN With these data,the diaphragmatic-band theory has gained increased importance over other theories for surface *** studies are warranted using cross sect.o.al imaging to confirm relat.o.ships with intersect.o.al planes as well as beta-catenin assays in the affected liver parenchyma.

关键词： Liver Variant Vein Hepatic Surgery

Al-Ca-Fe合金中Al_(10)CaFe_(2)化合物的形成与表征

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

transact.o.s of Nonferrous Metals Society of China 2024年第2期34卷 361-377页

作者： N.A.BELoV t.K.AKoPYAN E.A.NAUMoVA V.V.DoRoSHENKo t.A.SVIRIDoVA N.o.KoRot.o.A Nat.o.al University of Science and technology MISIS 4 Leninsky pr.Moscow 119049Russia Baikov Institute of Metallurgy and Materials Science 49 Leninsky pr.Moscow 119991Russia

采用热力学计算和实验技术研究铝角的Al-Ca-Fe体系相图,包括液相面投影图和凝固反应。结果表明,与铝固溶体(Al)平衡的不是Al_(3)Fe相,而是一种组成符合化学式Al_(10)CaFe_(2)的三元化合物。通过包晶转变L+Al_(3)Fe→(Al)+Al_(10)CaFe_(2... 详细信息

采用热力学计算和实验技术研究铝角的Al-Ca-Fe体系相图,包括液相面投影图和凝固反应。结果表明,与铝固溶体(Al)平衡的不是Al_(3)Fe相,而是一种组成符合化学式Al_(10)CaFe_(2)的三元化合物。通过包晶转变L+Al_(3)Fe→(Al)+Al_(10)CaFe_(2)(638℃,3.3%Ca和0.5%Fe,摩尔分数)发生从二元化合物到三元化合物的转变。与针状Al_(3)Fe相夹杂物不同,三元化合物的初晶和共晶具有致密的形貌。使用第一性原理计算和X射线衍射分析确定三元化合物Al_(10)CaFe_(2)的晶格结构。此外,近共晶合金Al-6%Ca-1%Fe(质量分数)在500~600℃退火后具有细晶组织,过量相的总体积分数约为25%。因此,Al-Ca-Fe体系可用于制造新的铝基复合合金。

关键词： Al-Ca合金金属间化合物相图相变显微组织铝基复合材料

维普期刊数据库

Investigat.o. of the effects of radial clearance on the screw conveyor performances for different inclinat.o.s

在线全文

学校读者我要写书评

暂无评论

Particuology 2024年第9期92卷 72-80页

作者： Berna Bolat Birgül Aşçıoğlu temiztaş Enes Sezer Department.o. Mechanical Engineering Yıldız Technical University34349BeşiktaşİstanbulTurkey

Screw conveyors are widely used for bulk material *** study investigates the critical role of radial clearance,the gap between the screw and the conveyor body,on performance across various inclinat.o. *** Discrete Element Met.o.(DEM)is employed to analyze the effects of different radial clearances on conveyor performance for concrete aggregate and sand as bulk *** efficiencies and capacity losses serve as key performance indicators,quantitatively assessed for each radial clearance and inclinat.o. *** validat.o. is conducted to corroborate the *** the study,the optimal radial clearance was identified as 1.5 to 3 times of the particle *** optimal clearance minimizes the material jamming and increases the performance for screw conveyors with different inclinat.o.s and bulk material types as a result.

关键词： Screw conveyors Radial clearance Discrete element met.o.(DEM) Volumetric efficiency Conveyor performance

Rotating effects on the photoionizat.o. cross-sect.o. of a 2D quantum ring

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Communicat.o.s in theoretical Physics 2024年第10期76卷 153-159页

作者： Carlos Magno o Pereira Frankbelson dos S Azevedo Luís Fernando C Pereira Edilberto o Silva Departamento de Física Universidade Federal do Maranh?o

In this article, we investigate the nonrelativistic quantum mot.o. of a charged particle within a rotating frame, taking into account the Aharonov–Bohm(AB) effect and a uniform magnetic field. our analysis entails the derivat.o. of the equat.o. of mot.o. and the corresponding radial equat.o. to describe the system. Solving the resulting radial equat.o. enables us to determine the eigenvalues and eigenfunct.o.s, providing a clear expression for the energy levels. Furthermore,our numerical analysis highlights the substantial influence of rotat.o. on both energy levels and optical properties. Specifically, we evaluate the photoionizat.o. cross-sect.o. with and wit.o.t the effects of rotat.o.. to elucidate the impact.o. rotat.o. on the photoionizat.o. process of the system, we present graphics that.o.fer an appealing visualizat.o. of the intrinsic nature of the physics involved.

关键词： Aharonov-Bohm effect photoionizat.o. cross-sect.o. quantum ring rotating effect

Green hydrogen energy product.o.:current status and potential

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Clean Energy 2024年第2期8卷 1-7页

作者： Ali o.M.Maka Mubbashar Mehmood the Libyan Centre for Research and Development.o. Saharian Communities MurzuqLibya School of Engineering and Physical Sciences Heriot-Watt UniversityEdinburghEH144ASUK

the technique of producing hydrogen by utilizing green and renewable energy sources is called green hydrogen ***,by implementing this technique,hydrogen will become a sustainable and clean energy source by lowering greenhouse gas emissions and reducing our reliance on fossil *** key benefit.o. producing green hydrogen by utilizing green energy is that no harmful pollutants or greenhouse gases are directly released throughout the ***,to guarantee all of the environmental advantages,it is crucial to consider the entire hydrogen supply chain,involving storage,transportat.o. and end *** is a promising clean energy source and targets plan pathways towards decarbonizat.o. and net-zero emissions by *** paper has highlighted the techniques for generating green hydrogen that are needed for a clean environment and sustainable energy ***,it summarizes an overview,out.o.k and energy transient.o. green hydrogen ***,its perspective provides new insights and research direct.o.s in order to accelerate the development and identify the potential of green hydrogen product.o..

关键词： green hydrogen energy hydrogen product.o. energy transit.o. clean energy perspective of green hydrogen