陈孟诗；王岩；黄京月
Introduction The silk fibers of silkworm have extraordinary mechanical properties. People commonly recognize that the ?- sheet structure in it mainly contributes that. So the formation of silk fiber from fibroin gel should be studied. Fibroin is primarily synthesized in the posterior division of silk gland of fifth - instar silkworm larva and from the posterior part to the anterior part of silk gland, the concentration of solution increases as well as a conformational transition, ? - helix to ? - sheet transition, occurs simultaneously. But little is known about the detailed process of the conformational transition under the influence of the concentration of fibroin gel. The present work studies the conformational transition of fibroin solution when it is diluted.
作者：Bo HUO；Xuan ZHU；Yong ZHAI 刊期： 2003年第z1期
Introduction Because of the complexity and sophistication of the in vivo environment, to systematically study the behavior of cellular response to mechanical forces has mainly relied on the use of in vitro preparations. The parallel plate flow chamber is the most common used for applying fluid shear stress to cultured cells. Most studies used parallel plate flow chambers under steady flow, and only a limited number of in vitro studies concerned with the influence of pulsatile flow. Several kinds of flow chamber were developed which can provide pulsatile flow to cells ( Helmilinger et al , 1991; Ruel et al. , 1995 ;Tacobes et al. , 1998).
作者：Yubo FAN；Wentao JIANG；Yuanwen ZOU；Ling BAI；Jinlin SONG；Ming ZHANG；Zonglai JIANG；Junkai CHEN 刊期： 2003年第z1期
Introduction It is well known that the deformation of an adherent leukocyte plays a critical role in response to external mechanical forces, but it remains to be elucidated that if it's nucleus deforms with cell deformation. Studies using parallel flow chambers, radial flow assays show that the stiffness of leukocyte increases when cells are allowed to spread or after adaptation to flow,both conditions being associated with a remodeling of the cytoskeleton ( Dong and Lei, 2000). However, most of these models are based on the hypothesis that the leukocyte is a solid sphere.
作者：Xiaoheng LIU；Xiong WANG；Hua HUANG 刊期： 2003年第z1期
一体化假肢是以高分子聚合物为材料,从接受腔到假腿一体成型的新型下肢假肢;而传统型假肢的假腿往往是一根金属杆,接受腔和金属杆之间用金属连接件连接.很明显,一体化假肢比传统型假肢更经济、美观、轻便,具有较大的研究价值,但目前一体化假肢还只是一个概念,尚未批量应用于临床.近,一些学者和机构开始致力于一体化假肢的研发,但尚未涉及对一体化假肢的应力分析.由于一体化假肢与传统型假肢在结构上的差异,因此对一体化假肢进行应力分析具有重要的意义.有限元方法已广泛应用于假肢领域,故本研究采用有限元方法对一体化假肢进行应力分析.
作者：刘展；樊瑜波；张明 刊期： 2003年第z1期
骨结构形态与力学环境相适应称为骨的功能适应性,它们的关系就是通常所说的受力与生长的关系.松质骨是骨重要的组成部分,是由不同板、杆状的骨小梁构成的网架结构.松质骨功能适应性的研究不仅是骨科临床发展的重要基础,而且有广泛的科学研究前景和重要的临床价值和健康意义.
作者：张春秋；朱兴华 刊期： 2003年第z1期
Mechano - chemical coupling is a common phenomenon that exists in various biological processes at different physiological levels. Bone tissue remodeling strongly depends on the local mechanical load. Leukocytes are sheared to form the transient aggregates with platelets or other leukocytes in the circulation. Flow pattern affects the signal transduction pathways in endothelial cells. Receptor/ligand interactions are important to cell adhesion since they supply the physical linkages among cells. How external forces influence the biological function has little been known, and nowadays attract more and more attentions. Here the forced dissociation of selectin/ligand binding is used to test mechano - chemical coupling at molecular level.
作者：Mian Long 刊期： 2003年第z1期
为探讨压力在血管重建中的作用,观察了不同静压力条件下,体外培养动脉中层平滑肌细胞的形态学变化、增殖与凋亡及其相关蛋白的变化趋向.本文选用成年雄性金华猪颈总动脉4～7cm,在不同静压力(160mmHg、100mmHg)下培养1、4、7天(控制血管内流体流量≤6ml/h)后,4%多聚甲醛固定,以新鲜血管为对照组,血管常规石蜡切片后,应用HE染色、免疫组织化学、TUNEL、Hoechst33258荧光染色、透射电镜等方法进行观察.
作者：张峰；张炎；刘波；刘艳春；姜宗来 刊期： 2003年第z1期
Introduction The coupling between the endothelium and blood flow is an important biomedical problem and has drawn extensive research. Endothelial cells (ECs) are known to adapt their shapes and functions in response to applied shear flow.Shear Stress being regarded as a primary triggering signal for cellular remodeling, it is important to understand the interaction mechanism between applied shear flow and endothelial cells.
作者：Xiaoheng LIU；Xiong WANG；Huaiqing CHEN 刊期： 2003年第z1期
TNF-α是一种多功能的细胞因子,具有杀伤或抑制肿瘤细胞,提高中性粒细胞吞噬能力等多种重要的生物学功能;同时也发现各种原因引发的感染性休克、炎症、自身免疫性疾病均表现为TNF-α表达水平过高.大量的研究结果表明,TNF-α参与诸如脓毒症、感染、自身免疫疾病、移植物排斥、移植物抗宿主病等多种人类疾病.随着TNF晶体结构的获得,目前已着手设计治疗策略以抑制或抵消TNF-α的活性.其中,国内外正在寻找中和TNF-α的抗体作为抑制TNF-α活性的手段.
作者：李宝霞；叶志义；龙勉 刊期： 2003年第z1期
An important goal of cardiac revascularization is to improve the left ventricular ejection fraction ( LVEF), which is an important long - term prognostic clinical indicator for patients with coronary artery disease. Prediction of cardiac function improvement after revascularization would be very helpful for patients with severe left ventricular dysfunction who are at high surgical risk. Our objective is to develop a quantitative method to estimate post -revascularization LVEF prior to revascularization.
作者：Haichao HAN；Stamatios LERAKIS 刊期： 2003年第z1期
本文的目的是利用定量的骨功能适应性模型建立一种描述骨质疏松的力学模型.目前国内外,尤其是国外,对于骨质疏松的研究很多,但大都集中在药物对骨质疏松的治疗,通常以骨质疏松结构的生化指标为研究对象,对骨质疏松进行的实验研究较多,建立定量模型的基础性理论研究还未见报道.
作者：宫赫；朱兴华 刊期： 2003年第z1期
Understanding of the biomechanics of human foot and ankle complex can help in designing a better foot support. Experimental approaches are limited to interfacial pressure measurement between the foot and supporting surface and gross motion tracking of major foot joints. The measurement of internal stress/strain and individual bony movement of the foot and ankle,which is essential in enhancing knowledge on the biomechanics of the foot, is still sparse due to experimental difficulties. Computer simulation provides an efficient alternative to acquire those important clinical parameters.
作者：Ming ZHANG；Jason Tak - Man CHEUNG；Yubo FAN 刊期： 2003年第z1期
Through the analysis of waveforms at different positions along the aorta of a dog, we described the reverse gradient of blood pressure during the slow ejection period in the aorta. We also explored some principles of the reverse gradient.
作者：Xiannong CHEN；Fugang WANG 刊期： 2003年第z1期
口腔种植体在植入过程中可产生机械损伤,从而在种植体界面形成由骨基质和血凝块组成的环状坏死区域(本文称为修复区).在标准的二阶段种植法中,种植体首先埋藏于颌骨内三到六个月(愈合阶段),然后通过第二次手术连接义齿或上部结构,开始承担功能载荷(功能阶段).因此,种植体在愈合期间并不直接承受载荷,修复区只间接经历由于颌骨在功能载荷作用下的变型所引起的应力.本文的目的在于建立一个关于种植体界面愈合的生物力学模型,并用有限元方法数值模拟种植体界面在愈合阶段和功能阶段的塑建改建过程.
作者：荣起国；J.Lenz；K.Schweizerhof；H.J.Schindler 刊期： 2003年第z1期
微载体悬浮培养是贴壁细胞的一种常见培养方式,在大多数传统的生物反应器中一般都有搅拌装置,这样会带来较高的剪切力并且极易导致湍流,容易使待培养的细胞受到损伤.
作者：鞠智好；刘天庆；崔占峰；马学虎 刊期： 2003年第z1期
骨髓间质干细胞(BMc)是一种多能前体细胞,可分化为心肌细胞、神经细胞、软骨细胞及骨细胞等.心肌细胞及神经细胞的显著特点是其离子通道的多样性,骨髓间质干细胞如何分化为这些细胞以及分化过程中骨髓间质干细胞有哪些变化,可以通过研究其离子通道的表达获得相应的信息.虽然骨髓间质干细胞的研究已经有很多成果,但关于其离子通道行为仍然未见报道,本文对此做了初步研究.
作者：张建保；M Bratbach；BK Fleischmann 刊期： 2003年第z1期
切应力可调节细胞的增殖和凋亡,从而影响血管的重建.研究低切应力对完整血管平滑肌细胞原癌基因蛋白c-Fos和c-Myc表达的影响,可以初步探讨切应力引起血管平滑肌细胞增殖和调亡的机制.本文应用血管体外应力培养系统,将一段完整的猪颈总动脉在体外进行培养,控制定常流和血管腔内压力100mmHg,在中(20dyn/cm2)、低(5dyn/cm2)切应力条件下体外培养1、6、24h,采用免疫组化和计算机图象分析方法观察血管壁平滑肌细胞c-Fos和c-Myc表达的情况.
作者：刘艳春；刘波；张峰；张炎；姜宗来 刊期： 2003年第z1期
人工心瓣的疲劳寿命,与患者的生命紧密相关.体外加速试验可以大大缩短研究周期,因而受到重视.以往的试验表明,体外模拟实验与体内寿命有相关性,它们表现在这几方面:(1)在体外疲劳试验中发生故障的人工心瓣组件在体内也会发生故障;(2)在体外模拟疲劳试验中构件磨损和疲劳的部位也是临床常见的部位;(3)在体外疲劳试验中寿命较高的人工心瓣,在体内寿命也长.
作者：席葆树；Ned H.C.Hwang；吴嘉 刊期： 2003年第z1期
骨是一种结缔组织,它既像钢一样坚硬,又像铝一样轻,是典型的层状梯度功能材料.骨的组分结构完全是由其功能决定的近于完美的一种构造.股骨其空心管型层状结构能适应各种不同姿态的人体负荷功能要求.人工假体植入后改变了股骨干的应力分布,不可避免地产生应力遮挡.运用非均质材料弯曲和扭转理论定量分析了单足站立相及坐位起立时股骨干在假体植入前、后的应力分布情况.比较了钴铬钼合金、钛合金、碳纤维聚砜(CRF/PSF)复合材料假体在股骨干峡部横截面的应力分布情况.由于股骨-假体界面两边材料性能不同,产生的较大应力差异可导致界面松动、剥离和损坏.不同假体的弹性模量不同,产生应力遮挡的程度不同.复合材料假体植入后界面两边应力差异小,应力遮挡率低.羟磷灰石表面涂层假体能缓和界面层的应力差异.
作者：唐六丁；赵为民 刊期： 2003年第z1期
应力与生长的关系,一直是广大生物力学工作者所关心的课题,不同的功能治疗和各种训练都可以使肌肉的收缩特性发生变化,本研究设计了对大鼠后肢骨骼肌的收缩特性进行测试的装置,利用该装置对一月龄大鼠后肢两组骨骼肌在电刺激下的收缩特性进行了测试,为研究大鼠骨骼肌在长期不同应力刺激水平及不同功能治疗等因素对其收缩特性改变打下基础.
作者：陈孟诗；王岩；黄京月 刊期： 2003年第z1期
医用生物力学杂志
主管:中华人民共和国教育部
主办：上海交通大学
