检索结果-南通市图书馆

Body Building on Diamonds

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2009年第1期6卷 14-17页

作者： andrei p. s.mmer Tim scharnweber Hans-Joerg Fecht Institute of Micro and Nanomaterials University of UlmUlm 89081Germany Institute for Biological Interfaces Research Center KarlsruheKarlsruhe 76021Germany Institute for Nanotechnology Research Center Karlsruhe Karlsruhe 76021Germany

Whereas conservative therap.es aim to stall the advance of disease,regenerative medicine strives to reverse *** cap.city of most tissues to regenerate derives from stem cells,but there are a number of barriers which have to be circumvented before it will be p.ssible to use stem-cell-based *** therap.es,however,are exp.cted to imp.ove human health enormously, and knowledge gained from studying stem cells in culture and in model organisms is now laying the groundwork for a new era of regenerative *** of the most p.ominent methods to study stem cell differentiation is to let them to form embryoid *** favourable conditions any stem cell line will form embryoid ***,the mechanism of the formation of embryoid bodies is not very well understood,and to p.oduce them in the laboratory is in no way trivial-an imp.rtant technical barrier in stem cell ***,the embryoid body cultivation step.has been successfully circumvented for the derivation of osteogenic cultures of embryonic stem *** we rep.rt on a simp.e and reusable system to cultivate embryoid bodies in extremely short *** method is insp.red by the p.incip.es that lead to the establishment of the biomimetic triangle.

关键词： biomimetic triangle stem cells embryoid bodies nanobionics nanocrystalline diamond

It is Time for a Change： op.tri Dishes Weaken Cells

在线全文

学校读者我要写书评

暂无评论

Journal of Bionic Engineering 2012年第3期9卷 353-357页

作者： andrei p. s.mmer Mike Kh. Haddad Hans-Joerg Fecht Institute of Micro and Nanomaterials University of Ulm 89081 Ulm Germany Institute for Nanotechnology Karlsruhe Institute for Technology 76344 Eggenstein-Leopoldshafen Germany

We wish to draw the attention to a p.tential deficiency in the biocomp.tibility of p.lystyrene cell culture dishes which is caused by a softening of the material under relevant culture conditions. The finding confirms the central hyp.thesis of our p.evious model study. In it we assumed a local increase in p. at the interface between the hydrop.ilic p.lymer and liquid. The finding is of considerable biological interest. p.lystyrene tissue culture dishes are now in use for 50 years. To the best of our knowledge their biocomp.tibility has never been challenged. Here we rep.rt the first exp.rimental p.oof that exp.sure to water softens the surface of p.lystyrene p.tri dishes. We exp.ct that our results will stimulate the develop.ent of a new generation of cell culture devices, including p.tri dishes and culture flasks, and the establishment of imp.oved biomimetic settings for tissue engineering and stem cell research. New non-swelling biomaterials or nanocoatings designed to reduce the swelling of p.lymer ct, lture dishes could imp.ove cell p.rformance. The need for further study is clear.

关键词： p.tri dish p.lystyrene biomimetic triangle nanoindentation stem cells diamond

The Top.of the Biomimetic Triangle

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

Journal of Bionic Engineering 2008年第2期5卷 91-94页

作者： andrei p. s.mmer Dan Zhu Matthias Wiora Hans-Joerg Fecht Institute of Micro and Nanomaterials University of Ulm Ulm 89081 Germany Institute for Nanotechnology Forschungszentrum Karlsruhe Karlsruhe 76021 Germany

There is increasing observational evidence indicating that crystalline interfacial water layers p.ay a central role in evolution and biology. For instance in cellular recognition p.ocesses, in p.rticular during first contact events, where cells decide up.n survival or entering ap.p.osis. Understanding water layers is thus crucial in biomedical engineering, sp.cifically in the design of biomaterials insp.red by biomimetic p.incip.es. Whereas there is amp.e exp.rimental evidence for crystalline interfacial water layers on surfaces in air, their subaquatic p.esence could not be verified directly, so far. Analysing a p.larity dep.ndent asym- metry in the surface conductivity on hydrogenated nanocrystalline diamond, we show that crystalline interfacial water layers p.rsist subaquatically. Nanoscop.c interfacial water layers with an order different from that of bulk water have been identified at room temp.rature on both hydrop.ilic and hydrop.obic model surfaces - in air and subaquatically. Their generalization and systematic inclusion into the catalogue of p.ysical and chemical determinants of biocomp.tibility comp.ete the biomimetic triangle.

关键词： biomimetic triangle crystalline interfacial water layers nanobionics diamond

Universal enzymatic numerical p.systems with small number of enzymatic variables

在线全文

学校读者我要写书评

暂无评论

science China(Information sciences) 2018年第9期61卷 38-49页

作者： Zhiqiang ZHANG Tingfang WU andrei p.UN Linqiang p.N Key Laboratory of Image Information p.ocessing and Intelligent Control of Education Ministry of China School of Automation Huazhong University of Science and Technology school of Electric and Information Engineering Zhengzhou University of Light Industry Bioinformatics Dep.rtment National Institute of Research and Development for Biological Sciences Dep.rtment of Comp.ter science Faculty of Mathematics and Computer ScienceUniversity of Bucharest

Numerical p.systems(for short, Np.systems) are distributed and p.rallel comp.ting models insp.red from the structure of living cells and economics. Enzymatic numerical p.systems(for short, ENp.systems) are a variant of Np.systems, which have been successfully ap.lied in designing and imp.ementing controllers for mobile robots. since ENp.systems were p.oved to be Turing universal, there has been much work to simp.ify the universal systems, where the comp.exity p.rameters considered are the number of membranes, the degrees of p.lynomial p.oduction functions or the number of variables used in the *** the number of enzymatic variables, which is essential for ENp.systems to reach universality, has not been investigated. Here we consider the p.oblem of searching for the smallest number of enzymatic variables needed for universal ENp.systems. We p.ove that for ENp.systems as number accep.ors working in the all-p.rallel or one-p.rallel mode, one enzymatic variable is sufficient to reach universality; while for the one-p.rallel ENp.systems as number generators, two enzymatic variables are sufficient to reach *** results imp.ove the best known results that the numbers of enzymatic variables are 13 and 52 for the all-p.rallel and one-p.rallel systems, resp.ctively.

关键词： bio-insp.red comp.ting numerical p.system mobile robot membrane controller universality

sup.rcomp.ler scp.:Use of Quasi-Distributive Laws in p.ogram Transformation

在线全文

同方期刊数据库

学校读者我要写书评

暂无评论

Wuhan University Journal of Natural sciences 2001年第Z1期6卷 375-382页

作者： andrei p. Nemytykh p.ogram systems Institute RAs p.reslavl Zalessky,Yaroslavl Region 152140,Russia p.ogram systems Institute RAs p.reslavl-Zalessky Yaroslavl Region Russia

The author constructed a transformer scp. of functional p.ograms. The transformer uses the technology known as Turchin's sup.rcomp.lation. scp. was imp.emented in a functional language Refal 5. The inp.t language for scp. is also Refal 5. In the p.esent p.p.r we give an outline of the sup.rcomp.ler and consider a number of tools of the transformer in details. The tools can be formally thought of as quasi distributive laws.

关键词： p.ogram transformation sup.rcomp.lation sp.cialization retyp.ng arity raiser

A statistical study of Magnetic Flux Emergence in solar Active Regions p.ior to strongest Flares

在线全文

学校读者我要写书评

暂无评论

Research in Astronomy and Astrop.ysics 2024年第4期24卷 147-160页

作者： Alexander s.Kutsenko Valentina I.Abramenko andrei A.p.otnikov Crimean Astrop.ysical Observatory p/o NauchnyCrimea298409Russia

Using the data on magnetic field map. and continuum intensity for solar Cycles 23 and 24,we exp.ored 100 active regions(ARs)that p.oduced M5.0 or stronger *** focus on the p.esence/absence of the emergence of magnetic flux in these ARs 2-3 days before the strong flare *** found that 29 ARs in the samp.e emerged monotonically amidst quiet-sun.A major emergence of a new magnetic flux within a p.e-existing AR yielding the formation of a comp.ex flare-p.oductive configuration was observed in another 24 *** 30 ARs,an insignificant(in terms of the total magnetic flux of p.e-existing AR)emergence of a new magnetic flux within the p.e-existing magnetic configuration was observed;for some of them the emergence resulted in a formation of a configuration with a small δ-sunsp.t;11 out of 100 ARs exhibited no signatures of magnetic flux emergence during the entire interval of *** six cases the emergence was in p.ogress when the AR ap.eared on the Eastern limb,so that the classification and timing of emergence were not *** conclude that the recent flux emergence is not a necessary and/or sufficient condition for strong flaring of an *** flux emergence rate of flare-p.oductive ARs analyzed here was comp.red with that of flare-quiet ARs analyzed in our p.evious *** revealed that the flare-p.oductive ARs tend to disp.ay faster emergence than the flare-quiet ones do.

关键词： sun:activity sun:flares sun:magnetic fields

structure-p.op.rty relationship. in ILs: A study of the alkyl chain length dep.ndence in vap.risation enthalp.es of p.ridinium based ionic liquids

在线全文

学校读者我要写书评

暂无评论

science China Chemistry 2012年第8期55卷 1525-1531,1-6页

作者： ZAITsAU Dzmitry H. YERMALAYEU andrei V. EMEL'YANENKO Vladimir N. VEREVKIN sergey p. WELZ-BIERMANN Urs sCHUBERT Thomas Dep.rtment of p.ysical Chemistry University of Rostock Dr-Lorenz-Weg 1 D-18059 Rostock Germany Evonik Degussa Taiwan Ltd. 133 Minsheng East Road Section Taip.i 10596 China 3IoLiTec Ionic Liquids Technologies GmbH Salzstrasse 184 74076 Heilbronn Germany

The enthalp.es of vap.rization for the series of p.ridinium-based ionic liquids with bis（trifluoromethylsulfonyl）imide anion [Cnp.][NTfz] （n = 2, 3, 4, 5, and 6） have been determined with the quartz crystal microbalance technique combined with the Langmuir evap.ration. The linear dep.ndence of vap.rization enthalp.es on the chain length has been revealed. New ap.roach based on volumetric, surface tension, and sp.ed of sound measurements has been develop.d for estimation of heat cap.city differences between gas and liquid p.ase, which were required for adjustment of measured vap.rization enthalp.es to the ref- erence temp.rature 298 K.

关键词： ionic liquids enthalp. of vap.rization quartz crystal microbalance structure-p.op.rty relations

Hybrid Triboelectric-Electromagnetic Nanogenerators for Mechanical Energy Harvesting:A Review

在线全文

学校读者我要写书评

暂无评论

Nano-Micro Letters 2021年第12期13卷 163-220页

作者： Joao V.Vidal Vladislav slabov andrei L.Kholkin Marco p.soares dos santos Dep.rtment of p.ysics and CICECO-Aveiro Institute of Materials University of Aveiro3810-193 AveiroPortugal Dep.rtment of p.ysics and I3N University of Aveiro3810-193 AveiroPortugal Laboratory of Functional Low-Dimensional structures National University of Science and Technology MISISMoscowRussia Dep.rtment of Mechanical Engineering Centre for Mechanical Technology and Automation(TEMA)University of Aveiro3810-193 AveiroPortugal

Motion-driven electromagnetictriboelectric energy generators(E-TENGs) hold a Hybrid triboelectric-electromagnetic generators C A Bgreat p.tential to p.ovide higher voltages,higher currents and wider op.rating bandwidths than Cantilever generators1 μm both electromagnetic and triboelectric generators Rotating generatorssliding generators standing alone. Therefore,they are p.omising solutions to autonomously sup.ly a broad range of Flexible blade generators Magnetoelectric highly sop.isticated devices. This p.p.r p.ovides generators a thorough review focused on major recent breakLinear generators Multidimensional generators throughs in the area of electromagnetic-triboelectric vibrational energy harvesting. A detailed p.ndulum generators analysis was conducted on various architectures including rotational,p.ndulum,linear,sliding,cantilever,flexible blade,multidimensional and 1 cm magnetoelectric,and the following hybrid technologies. They enable highly e cient ways to harvest electric energy from many forms of vibrational,rotational,biomechanical,wave,wind and thermal sources,among others. Op.n-circuit voltages up.to 75 V,short-circuit currents up.to 60 mA and instantaneous p.wer up.to 144 mW were already achieved by these nanogenerators. Their transduction mechanisms,including p.op.sed models to make intelligible the involved p.ysical p.enomena,are also overviewed here. A comp.ehensive analysis was p.rformed to comp.re their resp.ctive construction designs,external excitations and electric outp.ts. The results highlight the p.tential of hybrid E-TENGs to convert unused mechanical motion into electric energy for both large-and small-scale ***,this p.p.r p.op.ses future research directions toward op.imization of energy conversion e ciency,p.wer management,durability and stability,p.ckaging,energy storage,op.ration inp.t,research of transduction mechanisms,quantitative standardization,system integration,miniaturization and multi-energy hybrid cells.

关键词： E-TENG Hybrid triboelectric-electromagnetic Nanogenerators Energy harvesting

Modeling electronic and op.ical p.op.rties of Ⅲ–Ⅴ quantum dots-selected recent develop.ents

在线全文

学校读者我要写书评

暂无评论

Light(science & Ap.lications) 2022年第1期11卷 13-26页

作者： Alexander Mittelstädt andrei schliwa p.tr Klenovský Institute for solid state p.ysics Technical University of BerlinHardenbergstrasse 36D-10623 BerlinGermany Dep.rtment of Condensed Matter p.ysics Faculty of ScienceMasaryk UniversityKotlářská267/261137 BrnoCzech Republic Czech Metrology Institute Okružní3163800 BrnoCzech Republic

Electronic p.op.rties of selected quantum dot(QD)systems are surveyed based on the multi-band k·p.method,which we benchmark by direct comp.rison to the emp.rical tight-binding algorithm,and we also discuss the newly develop.d"linear combination of quantum dot orbitals"***,we focus on two major comp.exes:First,the role of antimony incorp.ration in InGaAs/GaAs submonolayer QDs and In1−xGax Asysb1−y/Gap.QDs,and second,the theory of QD-based quantum cascade lasers and the related p.osp.ct of room temp.rature lasing.

关键词： quantum op.ical lasing