高氟铝暨铝引起性发育前人和动物高钙及高骨矿性骨软化

对铝氟联合中毒27例2－11岁儿童和100日龄雄鸡实验3个月进行了动态观察。结果表明，骨软化伴 骨硬化的病人有22例，占81％；随着年龄增长，骨硬化渐渐突出；患儿全血钙、磷升高，血清Ca^2 正常范围偏高，血清P^5 下降。铝氟联合作用实验鸡性发育前、后全血钙一直较高，全血磷与血清Ca^2 、P^5 及其相关关系出现由高到低到高的交错变化；单独铝作用全血钙一直较高，碱到性成熟期下降，血清Ca^2 、P^5 一直较低。在性发育完成阶段，高铝可使类骨质矿化过度延迟，小幅度减少骨钙、磷含量，但骨部矿物元素和骨矿含量及骨密度不一定降低，甚至可小幅度升高，又有同软化；铝氟联合作用时类骨质矿化延迟时间仍过长，骨矿沉积率已高于对照，存在明显分离。氟可提高矿物元素含量，使骨矿化与骨硬化在骨组织不同层面茯结合成年病人的情况，认为铝氟联合 作用骨损害的表现与骨代谢速度及细胞生物化学和物理化学骨形成方式偏转的变化密切相关。     

Supramolecular Assembly of Triangulo Pd(II) Diimine Complexes Containing Triply‐Bridging Sulfide Ligands

We report here a substituent effect of diimines on the solid‐state assembly of interesting triangulo Pd(II) complexes, [(Pd(d‐t‐bpy))₃(μJ₃‐S)₂][NO₃]₂ 1 ·[NO₃]₂ and [(Pd(bpy))₃(μ₃‐S)₂][ClO₄]₂ 2 ·[ClO₄]₂ (d‐t‐bpy = 4,4′‐di‐tert‐butyl‐2,2′‐bipyridine, bpy = 2,2′‐bipyridine). 2 ·[ClO₄]₂ shows the intermolecular π···π interactions leading to the formation of one‐dimensional frameworks, whereas 1 ·[NO₃]₂ only shows the discrete structure in the solid state, featuring an interesting herring‐bone arrangement. The variation in structural motifs from 1 ·[NO₃]₂ to 2 ·[ClO₄]₂ is expected to be dominated by the substituent's steric hindrance for the diimine ligand. Thus, the crystal‐engineering approach has proved successful in the solid‐state packing due to a substituent's modification of the diimine ligand.     

去卵巢大鼠骨基质明胶修复骨缺损骨痂的矿物质元素分析

应用等离子体发射光谱仪测定了去卵巢水平下骨基质明胶修复大鼠颅骨骨缺损新生骨痂的矿物质元素含量。将28只雌性SD大鼠随机分为2组。去卵巢组切除双侧卵巢，伪手术对照组保留卵巢。术后4周在颅骨上制备骨缺损并同期植入骨基质明胶。8周后，测定新生骨痂的矿物质元素含量。结果显示，去卵巢大鼠新生骨痂的S、Ca、P、Zn、Fe和Cu含量较伪手术组显著降低。实验表明雌激素水平影响骨基质明胶修复骨缺损骨痂的矿物质元素含量。     

白血病骨髓移植患者口腔黏膜病与微量元素锌的关系

为研究白血病骨髓移植患者全血微量元素锌与口腔黏膜病的关系，用原子吸收光谱法检测了正常对照组与白血病骨髓移患者预处理前及移植后骨髓空虚期全血微量元素锌的含量，并观察了白血病骨髓移植患者空黏膜病变情况。结果表明，正常对照组全血锌浓度与白血病骨髓移植患者预处理前全血锌浓度比较，差异无显著性（P＞0．05），而预处理前全血锌浓度与骨髓空虚期全血锌浓度有显著性差异（P＜0．01），白血病缓解后（预处理前）血锌接受正常水平，无口腔溃疡发生，而白血病骨髓移植患者处理后骨髓空虚期全血锌含量显著降低，并出现不同程度的口腔黏膜病变，说明预处理影响微量元素锌的代谢，微量元素锌的减少与白血病骨髓移植患者移植患者口腔黏膜病的发生有关。     

A theory of the adaptive growth of biological materials

Summary In this paper, a new theory of the adaptive growth of biological materials is presented. The theory is derived from the basic laws of continuum mechanics. The material is described as a classical mixture of solid material and fluid. It will be shown that several well-known models of the adaptive growth are embedded in this more general theory. In addition, it is clarified on which material assumptions these models are based. Finally, a solution procedure for the new theory is developed, and several examples are given. Received 31 March 1999; accepted for publication 1 June 1999     

急/慢性粒细胞白血病患者骨髓血细胞的FTIR研究

研究了急性粒细胞白血病（AML）和慢性粒细胞白血病（CML）患者的骨髓淋巴细胞、粒细胞和红细胞的傅立叶红外光谱（FTIR）。结果发现：（1）这三种细胞FTIR存在着差异性。（2）AML与CML之间淋巴细胞和粒细胞的谱图差异性不明显，但红细胞的谱图却存在可识别的差异性。与CML红细胞相比，AML红细胞酰胺Ⅰ带较宽，AML红外细胞蛋白质二级结构中α-螺旋结构的含量较低；1540cm^-1与1084cm^-1吸收峰面积的比值较低，范围较窄，该结果提示，AML和CML骨髓血红细胞中核红细胞的数量分布不同，同时提示骨髓红细胞的成熟可能与白血病细胞的增殖有关。     

复合结构组织工程化人工骨的金属支架结构设计研究?

支架结构设计是组织工程化人工骨设计的重要内容之一,本文对金属与陶瓷材料构成的复合结构人工骨中金属支架的设计进行了研究。通过对髋关节置换后假体与股骨之间力的传递规律进行数值模拟研究,采用分截面分析、网格密度逐渐减小的设计方法,对复合结构人工骨中的金属支架结构进行了设计。通过对6种不同网格密度金属支架的受力情况进行对比分析,设计出了力学特性符合股骨受力规律的金属支架结构。     

去卵巢大鼠骨元素代谢紊乱机制研究

测定了去卵巢大鼠骨元素含量和血清相关激素和细胞因子含量,分析了去卵巢大鼠骨元素代谢紊乱的机制。将健康4月龄SD大鼠18只随机分成3组：正常对照组,假去卵巢大鼠组和去卵巢大鼠组。结果表明,去卵巢大鼠骨Ca、Mg、S、Mn、Zn等含量显著降低,P含量显著升高,血清E2、P、CT、GH等含量显著降低,IL-6、FSH、LH等含量显著升高。提示去卵巢大鼠骨元素代谢紊乱是雌激素水平下降与其他因素共同作用的结果。     

Effects of time delays in a mathematical bone model

In this paper we propose a mathematical model of bone remodeling with time delays of both osteoclast-derived paracrine signaling of tumor and tumor-derived paracrine signaling of osteoclast. The effects of time delays on the growth of tumor cells and bone system are studied in multiple myeloma-induced bone disease. In the case of small osteoclast-derived paracrine signaling, it is found that the growth of tumor cells slows down, the oscillation period of the ratio of osteoclasts to osteoblasts is extended with increasing time delay, and there is a competition between the delay and osteoclast-derived paracrine signaling. In the case of large tumor-derived paracrine signaling, the tumor-derived paracrine signaling can induce a more significant decline in tumor growth for long time delay, and thus slowing down the progression of bone disease. There is an optimal coupling between the tumor-derived paracrine signaling of osteoclasts and time delay during the progressions of bone diseases, which suppresses the tumor growth and the regression of bone disease.