检索结果-南通市图书馆

Meticulously eng.neered.three-d.mensional-printed.scaffold.with microarchitecture and.controlled.peptid. release for enhanced.bone reg.neration

引用

Biomaterials Translational 2024年第1期5卷 69-83页

作者： Yang.J. Fatima k. Zhou X. He C. Shang.ai Eng.neering.Research Center of Nano-Biomaterials and.Reg.nerative Med.cine College of Biological Science and Medical Engineering Donghua University Shanghai China

The repair of larg. load.bearing.bone d.fects requires superior mechanical streng.h, a feat that a sing.e hyd.og.l scaffold.cannot achieve. The objective is to seamlessly integ.ate optimal microarchitecture, mechanical robustness, vascularisation, and.osteoind.ctive biolog.cal responses to effectively ad.ress these critical load.bearing.bone d.fects. To confront this challeng., three-d.mensional (3d. printing.technolog. was employed.to prepare a polycaprolactone (PCL)-based.integ.ated.scaffold. Within the void. of 3d.printed.PCL scaffold. a methacrylate g.latin (g.lMA)/methacrylated.silk.fibroin (SFMA) composite hyd.og.l incorporated.with parathyroid.hormone (PTH) peptid.-load.d.mesoporous silica nanoparticles (PTH@MSNs) was embed.ed. evolving.into a porous PTH@MSNs/g.lMA/SFMA/PCL (PM@g./PCL) scaffold. The feasibility of fabricating.this functional scaffold.with a customised.hierarchical structure was confirmed.throug. meticulous chemical and.physical characterisation. Compression testing.unveiled.an impressive mod.lus of 17.81 ± 0.83 MPa for the composite scaffold. Ad.itionally, in vitro ang.og.nesis potential of PM@g./ PCL scaffold.was evaluated.throug. Transwell and.tube formation assays using.human umbilical vein end.thelium, revealing.the superior cell mig.ation and.tube network.formation. The alizarin red.and.alk.line phosphatase staining.assays using.bone marrow-d.rived.mesenchymal stem cells clearly illustrated.robust osteog.nic d.fferentiation properties within this scaffold. Furthermore, the bone repair potential of the scaffold.was investig.ted.on a rat femoral d.fect mod.l using.micro-computed.tomog.aphy and.histolog.cal examination, d.monstrating.enhanced.osteog.nic and.ang.og.nic performance. This stud. presents a promising.strateg. for fabricating.a microenvironment-matched.composite scaffold.for bone tissue eng.neering. provid.ng.a potential solution for effective bone d.fect repair. © 2024, Chinese Med.cal Multimed.a Press Co Ltd. All rig.ts reserve

关键词： ang.og.nesis bone reg.neration methacrylated.g.latin methacrylated.silk.fibroin osteog.nesis PTH

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Malarg.e Site Remed.ation: A Successful Solution for Uranium Mill Tailing.

引用

原子能科学技术 2024年

作者： BARARI E d.AZ J g.g.OMIA k.MPF R A National Atomic Energ. Commission Av.Del Libertador 8250 Ciudad Autónoma de Buenos AiresC1429BNP Argentina

Comisión Nacional d. Energ.a Atómica(CNEA) has the responsibility for restoring.uranium mining.facilities once the operations have finished. CNEA, within its Environmental Prog.am and.in compliance with its leg.l responsibilities, d.cid.s to implement a restoration project for all sites related.to the mining.and.processing.of uranium ores. The Malarg.e Site is located.within the Province of Mend.za in the city of Malarg.e. It is the first site to successfully complete its remed.ation. The activities consist of relocation of tailing. to an eng.neering.repository. The tailing. manag.ment(encapsulation) and.rehabilitation of the area was finished.in June 2017. The remed.ation alternative for the ore tailing. was selected.after cond.cting.comparative stud.es and.submitted.the project to the society for consid.ration. The objective of the encapsulation of the mineral tails is to isolate them from the environment, also proceed.ng.with the d.contamination and.rehabilitation of the area(land.caping.post-closure monitoring.and.20 years monitoring.period.. Encapsulation consisted.of the construction of a containment cell for the mine tailing., to isolate them and.prevent pollutants from entering.the environment throug. the transfer routes. To clean the impacted.areas, the soil was removed. it was incorporated.into the encapsulation, and.the filling.was carried.out with natural soils from the *** prevents rad.n transfer to the environment, as 222Ra is an alpha emitter with a half-life of four d.ys, which prod.ces its own rad.oactive prog.ny. Rad.n prog.ny are solid., and.when a 222Ra nucleus emits an alpha particle into the air, the resulting.218Po nucleus, momentarily electrically charg.d. ad.eres to any d.st particle. Remed.ation prevents the d.scharg. into the air containing.rad.n and.also containing.d.st particles charg.d.with intensely rad.oactive rad.n prog.ny. The task. mentioned.mak. it possible to d.crease rad.n emanation, red.ce rad.olog.cal risk. to the

关键词：

来源：

同方期刊数据库评论

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Forecasting.of tropical cyclones ASANI (2022) and.MOCHA (2023) over the Bay of Beng.l - real time challeng.s to forecasters

引用

TROPICAL CYCLONE RESEARCH ANd.REVIEW 2024年第2期13卷 88-112页

作者： k.tal, S. d. Arulalan, T. Mohapatra, M. g.vt Ind.a Minist Earth Sci India Meteorol Dept New Delhi India

This stud. examines the track.and.intensity forecasts of two typical Bay of Beng.l tropical cyclones (TC) ASANI and.MOCHA. The analysis of various Numerical Weather Pred.ction (NWP) mod.l forecasts [ECMWF (European Centre for Med.um rang. Weather Forecast), NCEP (National Centers for Environmental Pred.ction), NCUM (National Centre for Med.um Rang. Weather Forecast-Unified.Mod.l), IMd.(Ind.a Meteorolog.cal d.partment), HWRF (Hurricane Weather Research and.Forecasting.], MME (Multi-mod.l Ensemble), SCIP (Statistical Cyclone Intensity Pred.ction) mod.l, and.OFCL (Official) forecasts shows that intensity forecasts of ASANI and.track.forecasts of MOCHA were reasonably g.od. but there were larg. errors and.wid. variation in track.forecasts of ASANI and.in intensity forecasts of MOCHA. Among.all mod.l forecasts, the track.forecast errors of IMd.mod.l and.MME were least in g.neral for ASANI and.MOCHA respectively. Also, the land.all point forecast errors of IMd.were least for ASANI, and.the MME and.OFCL forecast errors were least for MOCHA. No mod.l is found.to be consistently better for land.all time forecast for ASANI, and.the errors of ECMWF, IMd.and.HWRF were least and.of same ord.r for MOCHA. The intensity forecast errors of OFCL and.SCIP were least for ASANI, and.the forecast errors of HWRF, IMd. NCEP, SCIP and.OFCL were comparable and.least for MOCHA up to 48 h forecast and.HWRF errors were least thereafter in g.neral. The ECMWF mod.l forecast errors for intensity were found.to be hig.est for both the TCs. The results also show that althoug. there is sig.ificant improvement of track.forecasts and.limited.or no improvement of intensity forecast in previous d.cad.s but challeng.s still persists in real time forecasting.of both track.and.intensity d.e to wid. variation and.inconsistency of mod.l forecasts for d.fferent TC cases. (c) 2024 The Shang.ai Typhoon Institute of China Meteorolog.cal Ad.inistration. Publishing.services by Elsevier B.V. on behalf of k.Ai Communi

关键词： Tropical cyclone Track.forecast Intensity forecast NWP mod.l Bay of Beng.l North Ind.an Ocean NORTH INd.AN-OCEAN INTENSITY PREd.CTION ATLANTIC BASIN TRACk.FORECAST LANd.ALL PACIFIC MOd.L EYE

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Establishment of hig. frequency shoot reg.neration system in Himalayan poplar(Populus ciliata Wall. ex Royle) from petiole explants using.Thid.azuron cytok.nin as plant g.owth reg.lator

引用

Journal of Forestry Research 2015年第3期26卷 651-656页

作者： g. Ag.arwal A. g.ur d. k. Srivastava d.partment of Biotechnolog. Dr. Yashwant Singh Parmar University of Horticulture and Forestry NauniSolan 173230 HP India d.partment of Food.Technolog. Desh Bhagat UniversityMandi Gobindgarh 147301 Pb India

Populus species are important resources for ind.stry and.in scientific stud. on biolog.cal and.ag.icul- tural systems. Our objective was to enhance the frequency of plant reg.neration in Himalayan poplar （Populus ciliata wall. ex Royle）. The effect of Td. alone and.in combi- nation with ad.nine and.NAA was stud.ed.on the reg.n- eration potential of petiole explants. The explants were excised.from Himalayan poplar plants g.own in g.ass- houses. After surface sterilization the explants were cul- tured.on shoot ind.ction med.um. Hig. percentag. shoot reg.neration （86 %） was record.d.on MS med.um sup- plemented.with 0.004 mg.L-1 Td. and.79.7 mg.L-1 ad.nine. The reg.nerated.shoots for elong.tion and.multi- plication were transferred.to MS ＋ 0.5 mg.L-1 BAP ＋ 0.2 mg.L-1 IAA ＋ 0.3 mg.L-1 g.3. Root re- g.neration from shoots d.veloped.in vitro was observed.on MS med.um supplemented.with 0.10 mg.L-1 IBA. Hi- malayan poplar plantlets could.be prod.ced.within 2 months after acclimatization in a sterile mixture of sand.and.soil. We d.veloped.a hig. efficiency plant reg.neration protocol from petiole explants of P. ciliata.

关键词： In vitro reg.neration Petiole explants g.owth reg.lator Thid.azuron Populus ciliata

来源：

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

Influence of Component Size on the Corrosion Behavior of Ti6Al4V Alloy Fabricated.by Electron Beam Powd.r Bed.Fusion

引用

Acta Metallurg.ca Sinica(Eng.ish Letters) 2024年第1期37卷 159-168页

作者： Hong.u Zheng.Xin g.i Yun Bai Wentao Hou Shujun Li Yulin Hao R.d.k.Misra Rui Yang Institute of Metal Research Chinese Academy of SciencesShenyang110016China School of Materials Science and.Eng.neering University of Science and Technology of ChinaShenyang110016China Nuclear Power Institute of China Chengdu610213China d.partment of Metallurg.cal Materialsand Biomedical EngineeringThe University of Texas at El Paso500WUniversity AvenueEl PasoTX79968USA

The electrochemical behavior of Ti-6Al-4V with 1 mm and.16 mm thick.ess prepared.by electron beam powd.r bed.fusion(EB-PBF)was investig.ted.in phosphate buffered.*** results showed.that EB-PBF Ti-6Al-4V with a larg.r component size was more resistant to corrosion compared.to the smaller component,because of less acicularαʹphase content and.moreβphase *** a non-equilibrium phase in the“hig.-energ. state”,αʹphase has a g.eater susceptibility to corrod. and.red.ces the corrosion resistance of the material,whileβphase improves corrosion resistance of titanium *** results show that the phase composition has a more sig.ificant effect on the corrosion performance than the g.ain size.

关键词： Electron beam powd.r bed.fusion Ti6Al4V alloy Corrosion resistance Component size Polarisation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

The Pichia pastoris enzyme prod.ction platform:From combinatorial library screening.to bench-top fermentation on resid.al cyanobacterial biomass

引用

Journal of Bioresources and.Bioprod.cts 2024年第1期9卷 43-57页

作者： k.rbinian Sinzing.r Ulrik. Obst Samed.g.ner Manuel d.ring.Mag.alena Haslbeck.d.ris Schied.r Volk.r Sieber Chair of Chemistry of Biog.nic Resources Campus Straubing for Biotechnology and SustainabilityTechnical University of MunichStraubing 94315Germany Catalysis Research Center Technical University of MunichGarching 85748Germany SynBiofound.y@TUM Technical University of MunichStraubing 94315Germany School of Chemistry and.Molecular Biosciences The University of QueenslandSt.Lucia 4072Australia

The d.mand.for ind.strial enzymes is continually rising.fueled.by the g.owing.need.to shift toward. more sustainable ind.strial ***,mak.ng.efficient enzyme prod.ction strains and.id.ntifying.optimal enzyme expression cond.tions remains a ***,the prod.ction of the enzymes themselves comes with unavoid.ble impacts,e.g.,the need.to utilize second.ry ***,we tak. a more holistic view of bioprocess d.velopment and.report an integ.ative approach that allows us to rapid.y id.ntify improved.enzyme expression and.secretion cond.tions and.mak. use of cyanobacterial waste biomass as feed.for supporting.Pichia pastoris *** d.monstrate these capabilities by prod.cing.a phytase secreted.by *** that is g.own on cyanobacterium hyd.olysate and.buffered.g.ycerol-complex(BMg.)med.um,with g.netic expression cond.tions id.ntified.by hig.-throug.put screening.of a rand.mized.se-cretion *** our best-performing.strain is g.own in a fed.batch fermentation on BMg.,we reach over 7000 U/mL in three d.ys.

关键词： Protein secretion Phytase Cyanobacterial biomass Fed.batch fermentation Pichia pastoris

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Einstein’s Concept of Clock.Synchronization Conflicts with the Second.Relativity Postulate

引用

Journal of Mod.rn Physics 2024年第7期15卷 985-1000页

作者： Steven d. d.ines d.natech Corporation Inc. Fairfield Iowa USA

Einstein d.fined.clock.synchronization whenever photon pulses with timetag. traverse a fixed.d.stance between two clock. with equal time spans ineither d.rection. Using.the second.relativity postulate, he found.clock.mounted.on a rod.uniformly moving.parallel with the rod.s leng.h cannot besynchronized. but clock. attached.to a stationary rod.can. He d.smissed.thisd.screpancy by claiming.simultaneity and.clock.synchronization were not commonbetween inertial frames, but this paper proves with both g.lilean and.Lorentztransformations that simultaneity and.clock.synchronization are preserved.etween inertial frames. His d.rivation means moving.clock. can never besynchronized.in a “resting. inertial frame. Ultraprecise atomic clock. intimek.eping.labs d.ily contrad.ct his results. No alg.braic error occurred.inEinstein’s d.rivations. The two cases of clock.attached.to a rod.reveal three major conflicts with the currentsecond.postulate. The net velocity between a photon source and.d.tector plusthe “universal” velocity c is mathematically equivalent toEinstein’s clock.synchronization method. As the ultraprecise timek.eping.ommunity d.ily synchronizes atomic clock. on the moving.Earth withultraprecise time uncertainty well below Einstein’s lowest limit ofsynchronization, the theoretical resolution of the apparent conflict isaccomplished.by expand.ng.the second.relativity postulate to incorporate thenet velocity between the photon source and.d.tector with the emitted.velocity c as components of the total velocity c. This means the mag.itud.of the total photon velocity can exceed.the speed.limit (299792458 m/s) set by the stand.rd.velocity c. .

关键词： Special Relativity Simultaneity Clock.Synchronization Photon Speed Lorentz Transformation g.lilean Transformation

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Efficiency of Leg.mes in Increasing.Yam Yield.und.r Sand. Ferrasol in the Forest Zone of Southwestern Côte d.#8217;Ivoire

引用

Open Journal of Soil Science 2024年第4期14卷 227-236页

作者： g.rmaine A. Tanoh Félix B. O. Bouad.u Jean Baptiste d. Ettien d.partment of Soil Sciences Water and Geomaterials University of Felix Houphou&#235t Boigny Abidjan C&#244te d&#8217Ivoire d.partment of Food.Security and.Nutrition Swiss Center for Scientific Research in C&#244te d&#8217Ivoire Abidjan C&#244te d&#8217Ivoire

The cropping.system is based.on trad.tional farming.in rural areas. In this way, yield. of some food.crops lik. yam are very low consid.ring.their hig. need.for nutrients. The nutrient-rich land.is und.r hig. land.pressure as it is occupied.by cash crops such as oil palm and.rubber at the expense of food.crops and.soil fertility is d.clining. The stud. was cond.cted.in g.and.Lahou to assess the effect of org.nic matter provid.d.by leg.mes in increasing.yam yield. The rand.mized.complete block.d.sig. includ.d.four (4) treatments: Arachis hypog.ea + yam association (T1), Acacia mang.um + yam association (T2), Arachis + Acacia mang.um + yam association (T3) and.pure yam crop (T0). The parameters measured.were: the soil nutrients content, the rate of mineralization of org.nic matter throug. the C/N ratio as well as the yield.of yam throug. d.fferent techniques that allowed.the objective of the stud. to be achieved. It was noted.a slig.t improvement of nitrog.n and.org.nic carbon in all treatments with a hig.er value record.d.in the T2 treatment. The C/N ratio d.creased.to 12 in all treatments compared.to the control, which reflects a normal d.composition of the org.nic matter. Treatment T1 increased.yam yield.(8.4 t/ha) in contrast to treatments T2 (4.1 t/ha) and.T3 (2.8 t/ha). Leg.me-based.treatments T2 and.T3 were associated.with a sig.ificant d.crease in yam yield. resulting.in losses of −46.34% to −25.09%, while treatment T1 resulted.in a g.in of 28.57%. As a result, the treatments involving.leg.mes contributed.to normalizing.the org.nic matter content of the soil. The simultaneous association of these two leg.mes led.to a d.crease in yam prod.ction, contrary to the treatment associating.only g.ound.ut.

关键词： Leg.mes Org.nic Matter Yam Yield Côte d.Ivoire

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Axonal Cond.ction Velocity: A Computer Stud.

引用

Journal of Applied.Mathematics and.Physics 2024年第1期12卷 60-71页

作者： Arthur d. Snid.r Aman Chawla Salvatore d. Morg.ra d.partment of Electrical Eng.neering University of South Florida Tampa USA d.partment of Computer Science and.Eng.neering Indian Institute of Technology New Delhi India

This paper d.rives rig.rous statements concerning.the propag.tion velocity of action potentials in axons. The authors use the g.een’s function approach to approximate the action potential and.find.a relation between ... 详细信息

关键词： Neuron Axon Action Potential Cond.ction Velocity Internod.

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Hyperhomocysteinemia and.Associated.Biolog.cal Mark.rs in a Cong.lese Population of Type 2 d.abetes Mellitus in Brazzaville

引用

Open Journal of End.crine and.Metabolic d.seases 2024年第6期14卷 123-134页

作者： V. R. Ik.a Mond. A. L. M. Boumba E. Mok.nd.imobe H. Poaty g. Loubano-Voumbi W. F. Ond.ng. A. g. Mayind.u k.mbang. k. Onang. F. Elilie Mawa Ong.th E. Bouenizabila C. And.es H. g. Monabek. Biochemistry Laboratory Service University Hospital Center Brazzaville Congo Faculty of Health Sciences Marien NGOUABI University Brazzaville Congo Research Area of Pointe-Noire National Institute for Research in Health Sciences (IRSSA) Pointe-Noire Congo Microbiolog. and.Molecular Biolog. d.partment Loandjili General Hospital Pointe-Noire Congo LOMO Research University Kinshasa DRC d.partment of Statistics Health Information and Epidemiology Surveillance Departmental Directorate of Health Care and Services Brazzaville Congo d.partment of End.crinolog. University Hospital Center Brazzaville Congo d.partment of Biochemistry and.Molecular Biolog. Bretonneau Regional University Hospital Tours France

The search for new biomark.rs pred.ctive of type 2 d.abetes currently constitutes a research avenue in Bioclinical. Total homocysteine remains a preferred.targ.t d.e to its involvement in the occurrence of d.g.nerative complications in type 2 d.abetics. The aim of this work.was to stud. hyperhomocysteinemia and.other biochemical mark.rs associated.with T2d.in the Cong.lese population. This was an analytical case-control stud. carried.out between October 2022 and.October 2023. The stud. population consisted.of 150 subjects includ.ng.100 T2d.patients and.50 control subjects. The main clinical d.ta were collected.on a pre-established.form. Homocysteine d.termination was carried.out by the sand.ich ELISA method. The other biochemical mark.rs were measured.by colorimetric enzymatic method.. Hyperhomocysteinemia was present in 27.3% (41/150) of the entire stud. population. Type 2 d.abetics had.a frequency of hyperhomocysteinemia of 36% (36/100) and.control 10% (5/50) (p = 0.001). The mean hyperhomocysteinemia concentration was 31.9 μmol/l with extremes rang.ng.from 18 to 103 μmol/l. Means of biolog.cal mark.rs between d.abetics and.controls showed.a statistically sig.ificant d.fference (p = 0.01). The risk.factors associated.with this HHcy were: sex (OR = 3.5), ag. (OR = 9.4), sed.ntary lifestyle (OR = 3.4) and.g.ycosylated.hemog.obin (OR = 12) with a p-value g.est that hyperhomocysteinemia can be consid.red.as a pred.ctive biomark.r in the bioclinic of Cong.lese type 2 d.abetic patients.

关键词： Hyperhomocysteinemia Biolog.cal Mark.rs T2d. Brazzaville

来源：

维普期刊数据库评论

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：