脊髓型颈椎病的发病机制及治疗的研究进展

在中老年人群中脊髓型颈椎病是造成脊髓功能障碍的主要原因,其发病机制复杂,主要有静态和动态因素、缺血、内皮细胞损伤和血脊髓屏障的破坏、炎症及细胞凋亡等学说,每一种学说并不能够完美的解释脊髓型颈椎病的发病机制,仍需进一步实验研究探索其机制。对于进行性发展的脊髓型颈椎病多采用手术治疗,手术方式主要有前路、后路及前后路联合手术,如何选择手术方案仍是临床医生关注的焦点,本文就该病的发病机制及手术治疗的相关进展作一综述。     

子宫内膜异位症的发病机理和治疗进展

本文系统地阐述了子宫内膜异位症的病因、发病机理和治疗方法,对各种治疗方法的优点和缺点进行了分析比较,并对子宫内膜异位症的治疗前景进行了讨论和小结。     

非洲猪瘟病毒的分子生物学研究进展

非洲猪瘟是一类动物传染病,致死率高达100%,在我国虽未发现该病,但一旦发生会给畜牧养殖业带来巨大经济损失。文中概述了非洲猪瘟病毒的分类、形态、基因组特征、主要结构蛋白,以及分子生物学诊断技术的研究进展。为进一步研究该病毒的复制机理、毒力、致病机理及疫苗的开发提供参考依据。     

线粒体的生理生化功能概述

线粒体是细胞内重要的细胞器,参与细胞内三羧酸循环、脂肪酸代谢、氧化磷酸化等多项重要的生理和生化过程。就线粒体的结构、功能、研究概况等进行阐述,阐明研究线粒体的意义。     

脊髓型颈椎病的手术治疗及进展

脊髓型颈椎病(CSM)是骨科的常见病与多发病,由于该病症状严重,且呈进行性加重,如诊断明确,应积极采取手术治疗.近年来该病的治疗技术有了很大的发展,手术方式多种多样,如何选择适当的手术方案一直为众多学者所关注,本文就该病的手术治疗及进展作一综述.     

On invariant property in population statistics

Concept of aging is developed to yield a relationship between life spans and the velocity of aging. The mathematical analysis shows that the mean extent of the advancement of aging throughout one’s life is conserved, or equivalently, the product of the mean life span, T, and the mean rate of aging, , is constant, . The result is in harmony with our experiences: it accounts for the unlimited replicability of tumor cells, and predicts the prolonged life spans of hibernating hamsters according to the equation, (T_χ=0 is a constant and χ denotes the total fraction of hibernation periods), in accordance with the Lyman and co-workers experiment. Comparing the present result and the empirical relationship between life spans of various mammals and basal metabolic rates, it is suggested that the mean rate of aging is intimately connected with the mean basal metabolic rate. With the help of this information, we inquire the reason of the difference in mean life spans between women and men, the result showing that the relative mean life span of women to men is T_women/T_men ≅ 1.08 for various nations, which is close to the corresponding relative value of the basal metabolic rate. The present analysis suggests, however, that this relationship between life spans and basal metabolic rates must be treated with caution.