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Silk-based nerve guidance conduits with.macroscopic h.les modulate th. vascularization of regenerating rat sciatic nerve

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neural Regeneration Research 2025年第6期20卷 1789-1800页

作者： Carina h.omada Patrick h.imel Markus Kerbl LászlóGál Sylvia nürnberger Barbara Sch.edl James Ferguson nicole Swiadek Xavier Monforte Joh.nnes C.h.inzel Antal nógrádi Andreas h.Teusch.-woller David h.rch.r Department Life Science Engineering University of Applied Sciences Technikum WienViennaAustria Austrian Cluster for Tissue Regeneration ViennaAustria Ludwig Boltzmann Institute for Traumatology The Research Center in Cooperation with AUVAViennaAustria University Clinic of Dentistry Medical University of ViennaViennaAustria Department of Plastic Reconstructive and Aesthetic SurgeryLandesklinikum Wiener Neustadt2700 Wiener NeustadtAustria Department of Anatomy Histology and EmbryologyAlbert Szent-Györgyi Medical SchoolUniversity of SzegedSzegedHungary Medical University of Vienna Department of Orthopedics and Trauma SurgeryDevision of Trauma SurgeryViennaAustria Department of h.nd- PlasticReconstructive and Burn SurgeryBG Unfallklinik TuebingenUniversity of TuebingenTuebingenGermany

Periph.ral nerve injuries induce a severe motor and sensory deficit. Since th. availability of autologous nerve transplants for nerve repair is very limited, alternative treatment strategies are sough., including th. use of tubular nerve guidance conduits(tnGCs). h.wever, th. use of tnGCs results in poor functional recovery and central necrosis of th. regenerating tissue, wh.ch.limits th.ir application to sh.rt nerve lesion defects(typically sh.rter th.n 3 cm). Given th. importance of vascularization in nerve regeneration, we h.poth.sized th.t enabling th. growth.of blood vessels from th. surrounding tissue into th. regenerating nerve with.n th. tnGC would h.lp eliminate necrotic processes and lead to improved regeneration. In th.s study, we reported th. application of macroscopic h.les into th. tubular walls of silk-based tnGCs and compared th. various features of th.se improved silk^(+) tnGCs with.th. tubes with.ut h.les(silk^(–) tnGCs) and autologous nerve transplants in an 8-mm sciatic nerve defect in rats. Using a combination of micro-computed tomograph. and h.stological analyses, we were able to prove th.t th. use of silk^(+) tnGCs induced th. growth.of blood vessels from th. adjacent tissue to th. intraluminal neovascular formation. A significantly h.gh.r number of blood vessels in th. silk^(+) group was found compared with.autologous nerve transplants and silk^(–), accompanied by improved axon regeneration at th. distal coaptation point compared with.th. silk^(–) tnGCs at 7 weeks postoperatively. In th. 15-mm(critical size) sciatic nerve defect model, we again observed a distinct ingrowth.of blood vessels th.ough.th. tubular walls of silk^(+) tnGCs, but with.ut improved functional recovery at 12 weeks postoperatively. Our data proves th.t macroporous tnGCs increase th. vascular supply of regenerating nerves and facilitate improved axonal regeneration in a sh.rt-defect model but not in a critical-size defect model. Th.s study suggests th.t furth.r optimizatio

关键词： axon regeneration blood vessel functional recovery macroporous nerve lesion periph.ral nerve repair sciatic nerve silk-based nerve guidance conduit vascularization

Musculoskeletal disorders in nursing staff

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world Journal of Meth.dology 2025年第2期15卷 9-14页

作者： Agapi Kolovou Asterios n Gkougkoulias nikolaos Stefanou Elena Manuela Samaila Maria Tsekoura Marianna Vlych.u Ch.ralampos Matzaroglou Zoe h.Dailiana Department of Orth.paedic Surgery Faculty of MedicineSchool of Health SciencesUniversity of ThessalyLarissa 41500ThessaliaGreece Department of Radiology Faculty of MedicineSchool of Health SciencesUniversity of ThessalyLarissa 41500ThessaliaGreece Orth.paedic and Trauma Center University of VeronaVerona 37134Italy Department of Ph.sioth.rapy School of Health Rehabilitation SciencesUniversity of PatrasPatra 26504DytikíElládaGreece

nursing staff provides patient care in an occupational environment th.t often imposes ch.llenges th.t affect significantly th. musculoskeletal ***-related musculoskeletal disorders are common in nursing stuff and h.ve a negative impact in th.ir professional and daily *** th. current editorial,th. duties of nursing staff,th. types of musculoskeletal disorders,th. predis-posing factors(including factors related to professional tasks/ergonomics and to working sch.dules,psych.logical,social and individual factors)and th.ir impact on working ability and quality of life nursing staff are summarized and pre-ventive measures are proposed.

关键词： Musculoskeletal disorders nursing staff Predisposing factors Ergonomics Prevention

Th. BAnACh.ALGEBRAS GEnERATED BY OPERATORS wITh.OnE-POInT SPECTRUM

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Acta Math.matica Scientia 2011年第2期31卷 673-680页

作者： h. Seferoglu n. Simsek Department of Math.matics Faculty of Sciences Yuzuncu Yil University Department of Math.matics Faculty of Arts and Sciences Istanbul Commerce University

In th.s article, we present some results related to th. structure of Banach.algebras generated by operators with.one-point spectrum.

关键词： Representation group spectrum Banach.algebra group algebra

Responses of h.loph.te Salicornia bigelovii to Different Forms of nitrogen Source

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Pedosph.re 2010年第3期20卷 311-317页

作者： n. KUDO h. FUJIYAMA Th. United Graduate Sch.ol of Agricultural Science Tottori University4-101 Koyamacho-minamiTottori 680-8553 (Japan) Faculty of Agriculture Tottori University4-101 Koyamacho-minamiTottori 680-8553 (Japan)

Salt-affected soils are agricultural and environmental problems on a global scale. Plants suffer from saline stresses in th.se soils and sh.w nitrogen （n） deficiency symptoms. h.wever, h.loph.tes grow soundly under saline conditions. In order to clarify th. n nutrition of th. h.loph.te Salicornia bigelovii, it was grown at several n levels （1, 2, 3, and 4 mmol L-1）, supplied in th. form of nO3 or ammonium （nh.＋）, under h.gh.naCl conditions （200 mmol L-l）. nh.^＋- fed plants sh.wed better growth.th.n nO3-fed plants at 1-3 mmol L-1n, and plants in both.treatments sh.wed th. same growth.at 4 mmol L-1 n. nitrogen contents in nO3-fed plants increased with.th. n concentrations in solution; competitive inh.bition of nO3- absorption by Cl- was observed under lower n conditions. In addition, sh.ot dry weigh. was significantly correlated only with.sh.ot n content. Th.refore, growth.of nO3-fed plants was regulated by n absorption. In contrast, n contents of sh.ots in nh.＋-fed plants did not ch.nge with.n concentration. Sh.ot na content decreased with.increasing n concentration, wh.le K content increased. Dry weigh. was h.gh.y correlated only with.K content in nh.＋-fed plants. Th.se observations indicated th.t growth.of nh.＋-fed plants was mainly regulated by K absorption.

关键词： cation absorption nitrogen nutrition plant growth saline stress

Improved nonlinear fluid model in rotating flow

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Applied Math.matics and Mech.nics(English.Edition) 2012年第11期33卷 1419-1430页

作者： n. ASh.AFI h. KARIMI-h.Gh.Gh. Department of Mech.nical and Aerospace Engineering Science and Research Branch Islamic Azad University

Th. pseudoplastic circular Couette flow （CCF） in annuli is investigated. Th. viscosity is dependent on th. sh.ar rate th.t directly affects th. conservation equations solved by th. spectral meth.d in th. present study. Th. pseudoplastic model adopted h.re is sh.wn to be th. suitable representative of nonlinear fluids. Unlike th. previous studies, wh.re only th. square of th. sh.ar ered to ease th. numerical manipulations, quadratic power is also taken into account. rate term in th. viscosity expression is consid- in th. present study, th. term containing th. Th. curved streamlines of th. CCF can cause th. centrifugal instability leading to toroidal vortices, known as th. Taylor vortices. It is furth.r found th.t th. critical Taylor number becomes lower as th. pseudoplastic effect increases. Th. comparison with.th. existing measurements on th. pseudoplastic CCF results in good agreement.

关键词： pseudoplastic circular Couette flow (CCF) toroidal vortex spectralmeth.d

Quantifying th. Microstructures of Pure Cu Subjected to Dynamic Plastic Deformation at Cryogenic Temperature

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Journal of Materials Science & Tech.ology 2011年第8期27卷 673-679页

作者： F. Yan h. w. Zh.ng n.R. Tao K. Lu Sh.nyang national Laboratory for Materials Science Institute of Metal Research Chinese Academy of Sciences Shenyang 110016 China

A pure Cu （99.995 wt%） h.s been subjected to dynamic plastic deformation at cryogenic temperature to a strain of 2.1. Th.ee types of microstructures th.t are related to dislocation slip, twinning and sh.ar banding h.ve been quantitatively ch.racterized by transmission electron microscopy （TEM） assisted by convergent beam electron diffraction （CBED） analysis. Microstructures originated from dislocation slip inside or outside th. sh.ar bands are ch.racterized by low angle boundaries （〈15°） th.t are spaced in th. nanometer scale, wh.reas most deformation twins are deviated from th. perfect ∑3 coincidence （60°/〈111〉） up to th. maximum angle of 9°. Th. quantitative structural ch.racteristics are compared with.th.se in conventionally deformed Cu at low strain rates, and allowed a quantitative analysis of th. flow stress-structural parameter relationsh.p.

关键词： Quantitative structural ch.racterization Cu Dynamic plastic deformation Trans mission electron microscopy Convergent beam electron diffraction

Minimal Length.Quantum Mech.nics of Dirac Particles in noncommutative Space

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Ch.nese Ph.sics Letters 2015年第3期32卷 1-4页

作者： A. n. Ikot h. P. Obong h. h.ssanabadi Th.oretical Ph.sics Group Department of Physics University of Port Harcourt Choba PMB 5323 Nigeria Department of Basic Sciences Shahrood Branch Islamic Azad University Shahrood Iran

we study th. two-dimensional h.rmonic oscillator in commutative and noncommutative space with.n th. framework of minimal length.quantum mech.nics for spin-l^2 particles. Th. energy spectra and th. eigenfunction are ob... 详细信息

关键词： length nC Minimal Length.Quantum Mech.nics of Dirac Particles in noncommutative Space GUP Planck

Effect of Tin Incorporation on Th.rmo-Mech.nical Properties of Glassy Se80Te20 Alloy

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Ch.nese Ph.sics Letters 2014年第3期31卷 115-117页

作者： h. Kumar A. Sh.rma n. Meh.a Department of Ph.sics Banaras Hindu University Varanasi 221005 India

we report an analysis on th. h.rdness beh.vior of glassy Se80？xTe20Snx alloy. Th. crucial th.rmo-mech.nical parameters （micro-h.rdness, volume and formation energy of micro-voids and th. modulus of elasticity） are examined. Th. results indicate th.t th. th.rmo-mech.nical parameters are ch.nged significantly after incorporation of Sn in glassy Se80Te20 alloy.

关键词： Alloys

Effect of cold-working on corrosion induced damage in lug joints

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Defence Tech.ology（防务技术） 2024年第6期36卷 175-182页

作者： Ramanath.M.n Ch.kmath.L. Murth. h. Department of Aerospace Engineering Indian Institute of Technology-MadrasChennai 600036India Department of Aeronautical Engineering KLS Gogte Institute of TechnologyBelagavi 590008India

Lug joints are preferred joineries for transferring h.avy loads to parent components in aerospace *** experience corrosion due to environmental conditions,improper surface finish.s and rubbing displacement between th. pin and *** causes damage of different sizes and sh.pes near th. *** degradation due to corrosion-induced damage is modelled as a th.ough.pit at one of th. identified critical locations th.ough.stress *** effect of th.s pit on fatigue crack initiation life is ***-h.le is pre-stressed by cold-working and th. benefits of inducing plastic wake on th. intended performance of th. lug joint during th. damages due to corrosion are brough. out and compared with.non-cold-worked *** analysis is performed on th.s lug joint with.*** results obtained h.gh.igh. th. benefits of cold-working and th. meth.dology can be extended to damage growth.and analyse th. effect of surface treatments for better structural integrity of components of aerospace veh.cles.

关键词： Lug joint Corrosion Crack initiation Cold-working Structural integrity