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Mechanisms oftoothdamageand Paranthropus dietary reconstruction

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Biosurface and Biotribology 2018年第3期4卷 73-78页

作者： Paul Joseph Constantino Oscar Borrero-Lopez Brian r.Lawn Department of Biology Saint Michael's CollegeColchesterVT 05439USA Departamento de Ingenieria Mecanica Energetica y de los MaterialesUniversidad de Extremadura06006 BadajozSpain Materials Measurement Laboratory National Institute of Standards and TechnologyGaithersburg MD 20899USA

According to the current fossil record,the extinct hominin genus Paranthropus and the genus Homo both first appeared~2.7 million years *** this similarity in geological age,Paranthropus evolved enormous postcanine teeth with very thick enamel while Homo evolved smaller *** from contact mechanics mode ls derived from mu ltiple scales of tooth damage(microwear,macrowear,and fracture)are reviewed to examine this evolutionary divergence and the role that diet may have played in *** scale of investigation reveals different kinds of evide nce that can be combined into a more complete picture of hominin diet and feeding beh *** owear reveals information about recent feeding events,while macrowear and fr acture record longer-term *** synthesis of all three levels of evidence exposes significant dietary diversity,not only between these two hominin genera but within them as *** Paranthropus,the eastern and southern African species(*** and ***,respectively)were morphologically similar but appear to have been functionally *** *** apparently used its teeth to consume large quantities of low qua lity vegetation,*** had a more varied diet that included harder objects,possibly items such as seeds,nuts,or underground storage organs.

关键词： quantities similarity damage

Influence of mixed organosilane coatings with variable rGD surface densities on the adhesion and proliferation of human osteosarcoma Saos-2 cells to magnesium alloy AZ31

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Bioactive Materials 2017年第1期2卷 35-43页

作者： Xiaoxi Yang Afrah Al Hegy Eric r.Gauthier Joy Gray-Munro Dept.of Chemistry and Biochemistry Laurentian UniversitySudburyOntarioP3E 2C6Canada

In the last decade,the use of magnesium and its alloys as biodegradable implant materials has become increasingly ***,surface modification of these materials to control the degradation rate in the early stages of healing and improve their biocompatibility is crucial to the successful implementation of magnesium alloy implants in *** adhesion and proliferation at the implant surface is a vital factor for successful integration of a biomaterial within the *** accomplish this task by binding to ligands such as the arginine-glycine-aspartic acid peptide sequence(rGD)commonly found on adhesive proteins present in the extracellular *** this paper,we report a biomimetic surface modification strategy involving deposition of a mixed organosilane layer on Mg AZ31 followed by covalent immobilization of rGD peptides through a heterobifunctional cross-linker *** results indicate that with optimized deposition conditions uniform organosilane coatings were successfully deposited on the Mg AZ31 ***,we have demonstrated that the surface density of immobilized rGD can be varied by depositing organosilane layers from solutions containing two different organosilanes in specified *** in cell adhesion and cell proliferation were observed on the surface modified substrates.

关键词： Magnesium alloys Biodegradable Biomimetic rGD peptide Surface modification Cell adhesion Organosilane

Observer design for a class of linear time-varying systems

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Observer design for a class of linear time-varying systems

Investigation on Electron Beam Welded Copper to AISI 316 Stainless Steel Joints

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作者： L.T.Li G.r.Duan Center for Control Theory and Guidance Technology Harbin Institute of Technology

ISBN: (纸本)9781538629185

The problem of observer design for a class of linear time-varying system is researched in this paper. An augmented linear time-varying system is proposed to extent the application of the previous results. Moreover, using the observable block companion form of the augmented linear time-varying system, this paper presents an algorithm of observer design. Compared with other observer design approaches, the prominent feature of the algorithm is that of simplifying the computational ***, simulations are designed in linear time-varying system and results are presented to demonstrate validity of the proposed algorithm.

关键词： augmented linear time-varying systems observability block companion form observer design

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厦门大学学报（自然科学版） 2002年第S1期41卷 90-91页

作者： El-Hebeary M r Megahed H Elziady N Faculty of Engineering Cairo UniversityFaculty of Engineering Cairo UniversityFaculty of Engineering Cairo University Giza EgyptGiza EgyptGiza Egypt

Joints of copper and stainless steels are used in a er ospace applications. Production of these joints by fusion welding faces many dif ficulties. This may be due to the differences in their physical, metallurgical a nd mechanical properties. Electron Beam Welding (EBW) process has been found to be especially well suited in this area. Selection of the appropriate welding par ameters needs thorough investigations. These parameters include: preheat tempera ture (℃), welding current (I w), focusing current (I F), welding spee d (V), height between the gun and workpiece surface (H), scan width (S w) and shift distance (S). The present work aims firstly, setting the pr oper welding conditions to get sound joint between commercially pure copper (C10 200) and AISI 316 stainless steel plates 8 mm thickness. Secondly, investigate t he effect of Electron Beam (EB) shift, single-sided and double-sided welds on the mechanical, metallurgical and chemical properties of the weld bead. Due to t he high difference in thermal conductivity between copper and stainless steel, E lectron Beam (EB) was shifted towards copper with different values. These values were ranged from 0.3 to 0.9 mm in welding without preheating of copper plate an d from 0.1 to 0.4 mm with preheating. Number of joints were welded using variabl e EBW parameters in view to obtain the sound weld bead. These parameters are as follows: gradual reduction I w=51 to 49 mA, I F=845 mA, V=8 mm/sec , H=130 mm, S w=500 μm and S=0.4 mm. The investigation has shown t hat, the copper (C10200) plate must be preheated to get sound welded joint with AISI 316 stainless steel using the EBW process. The tensile fracture in all wel ded samples occurred in copper plate away from the weld bead. This reflects that the weld bead tensile strength is greater than the copper strength. The EB shif t has slight effect on hardness distribution through weld bead. The hardness val ue (H v) reduces in gradual manner from stainless steel hardness to

关键词： AISI Investigation on Electron Beam Welded Copper to AISI 316 Stainless Steel Joints

Galectin-3 possible involvement in antipsychotic-induced metabolic changes of schizophrenia:A minireview

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World Journal of Diabetes 2021年第10期12卷 1731-1739页

作者： Milica M Borovcanin Katarina Vesic Milena Jovanovic Natasa r Mijailovic Department of Psychiatry University of KragujevacFaculty of Medical SciencesKragujevac 34000SumadijaSerbia Department of Neurology University of KragujevacFaculty of Medical SciencesKragujevac 34000SumadijaSerbia PhD Studies University of KragujevacFaculty of Medical SciencesKragujevac 34000SumadijaSerbia Clinic for Nephrology and Dialysis University Clinical Center KragujevacKragujevac 34000SumadijaSerbia Department of Pharmacy University of KragujevacFaculty of Medical SciencesKragujevac 34000SumadijaSerbia

recently,specific immunometabolic profiles have been postulated in patients with schizophrenia,even before full-blown disease and independent of antipsychotic *** profiling studies offer a promising potential for elucidating the cellular and molecular pathways that may be involved in the onset and progression of schizophrenia symptoms,and co-occurrent metabolic *** view of all this,we were intrigued to explore galectin-3(Gal-3)as a glycan,and in our previous study,we measured its elevated levels in remission of *** finding may be a consequence of antipsychotic treatment and may have an impact on the onset of inflammation,the development of obesity,and the presumed cognitive changes in *** the animal study,it was shown that downregulation of Gal-3 was beneficial in insulin regulation of obesity and cognitive *** involving plasma exchange are discussed in this review,particularly in the context of Gal-3 elimination.

关键词： Galectin-3 Schizophrenia Metabolic syndrome Insulin resistance Cognition Antipsychotics

Insight into Neuroethical Considerations of the Newly Emerging Technologies and Techniques of the Global Brain Initiatives

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Neuroscience Bulletin 2023年第4期39卷 685-689页

作者： Christopher r.Wood Yongmei Xi Wei-Jun Yang Hao Wang MOE Laboratory of Biosystem Homeostasis and Protection College of Life SciencesZhejiang UniversityHangzhou310058China Institute of Genetics Zhejiang Provincial Key Laboratory of Genetic and Developmental DisordersZhejiang University School of MedicineHangzhou310058China Department of Neurobiology and Department of Neurosurgery of Second Affiliated Hospital Key Laboratory for Biomedical Engineering of Education MinistryZhejiang University School of MedicineHangzhou310058China NHC and CAMS Key Laboratory of Medical Neurobiology Key Laboratory of Precise Treatment and Clinical Translational Research of Neurological DiseasesMOE Frontier Science Centre for Brain Research and Brain Machine IntegrationSchool of Brain Science and Brain MedicineZhejiang UniversityHangzhou310058China

Introduction At the rock face of neurobiology stand seven global brain *** them,much of the global funding for neuroscience and neurotechnology(over 9 billion USD)is being channeled,and the rapid development of new techniques and technologies is the *** ethicists have questioned the sufficiency of the pre-existing ethical and legal frameworks to provide adequate oversight for such rapidly-emerging neurotechnologies and their often-unique applications and implications.

关键词： legal ethical funding

Stock market and macroeconomic variables:new evidence from India

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Financial Innovation 2019年第1期5卷 503-519页

作者： r.Gopinathan S.raja Sethu Durai School of economics shri mata vaishno devi universitykatrajammu&kashmir 182320india school of economics university of hyderabadhyderabadtelangana 500046india

Understanding the relationship between macroeconomic variables and the stock market is important because macroeconomic variables have a systematic effect on stock market *** study uses monthly data from India for the period from April 1994 to July 2018 to examine the long-run relationship between the stock market and macroeconomic *** empirical findings suggest that standard cointegration tests fail to identify any relationship among these ***,a transformation that extracts the actual functional relationship between these variables using the alternating conditional expectations algorithm of(J Am Stat Assoc 80:580–598,1985)identifies strong evidence of cointegration and indicates nonlinearity in the long-run ***,the continuous partial wavelet coherency model identifies strong coherency at a lower frequency for the transformed variables,establishing the fact that the long-run relationship between stock prices and macroeconomic variables in India is nonlinear and *** evidence has far-reaching implications for understanding the dynamic relationships between the stock market and macroeconomic variables.

关键词： Stock prices Nonlinear cointegration Alternating conditional expectations Continuous wavelet transformation

Effect of financial constraints on the growth of family and nonfamily firms in Turkey

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Financial Innovation 2020年第1期6卷 489-514页

作者： Bahadır Ergün Ömer Tuğsal Doruk Department of International Trade and Finance Adana Alparslan TürkeşScience and Technology UniversityAdanaTurkey Department of Business Administration Adana Alparslan TürkeşScience and Technology UniversityAdanaTurkey

This study examined whether family-owned firms have advantages for accessing external financial sources for *** in developing countries with imperfect markets,firms can face difficulties accessing external financing sources;however,family-owned firms might have some advantages in this regard over nonfamily *** previous studies,this study considered that,in the Turkish context,nonfamily firms are financially constrained while family firms are *** examine this hypothesis,we used the generalized method of moments(GMM)approach to analyze panel data from 2006 to *** findings showed that financing constraints were a significant obstacle to growth for nonfamily-owned manufacturing firms while the effect was not present for family firms since they are controlled by large,well-established family *** results elucidate the relationship between corporate ownership and growth among Turkish firms,especially those with strong links to large family-owned *** results also revealed that reputation and network may facilitate easier access to external financing sources,especially when considering the“Big Six”family ties of firms.

关键词： Financing constraints Firm growth Turkish manufacturing sector GMM

Manipulation of Animal Production by Biotechnology

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Journal of Northeast Agricultural University(English Edition) 1997年第2期4卷 137-159页

作者： Shan Anshan (Northeast Agricultural University, Harbin 150030, P r China)

Basal level of Animal Production is maintained with regulation of endocrine to concert genetic potential and environmental conditions. This balance can be moved to dramatical imporvements in rate and efficiency of production as well as composition of the products by biotechnological methods. In this paper, several novel achievements in the last decade are briefly reviewed for refference to further research and application of biotedchnology in animal production.

关键词： biotechnology animal production manipulation