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Advantages and disadvantages of living with one‘s parents 与父母一起生活的好坏

Advantages and disadvantages of living with one‘s parents 与父母一起生活的好坏

Advantages and disadvantages of living with one?s parents

Recently, the issue of whether children should live with his her parents after getting married have been in the limelight and has aroused wide concern in the public. Just as the saying goes “So many people, so many minds.” ,thus different people come up with various attitudes.

As a matter of fact, every coin has two sides. To illustrate this question, there are also drawbacks as well as merits. To begin with, people living with their parents. And of course, this kind of way can be regarded as a reward to their parents. More importantly, in many old people?s mind, it may be more appropriate to keep company with them rather than to spend so much money in buying some unnecessary things. Only in this way can the parents become happier. However, there are also some disadvantages living with a husband?s parents may lead to another tough problem. Consequently, his mother and wife may become unhappy. For another, many couples have their own life and jobs, and as a result, they will have little time to tackle every thing of their parents.

Weighing up these two aspects, I?m in favor of living with the parents .Just because how long our parents will live after we get married, we have the duty to give almost what ever we can to reward them. It …s our Chinese traditional merits.

脐带干细胞综述

脐带间充质干细胞的研究进展 间充质干细胞(mesenchymal stem cells,MSC S )是来源于发育早期中胚层 的一类多能干细胞[1-5],MSC S 由于它的自我更新和多项分化潜能,而具有巨大的 治疗价值 ,日益受到关注。MSC S 有以下特点:(1)多向分化潜能,在适当的诱导条件下可分化为肌细胞[2]、成骨细胞[3、4]、脂肪细胞、神经细胞[9]、肝细胞[6]、心肌细胞[10]和表皮细胞[11, 12];(2)通过分泌可溶性因子和转分化促进创面愈合;(3) 免疫调控功能,骨髓源(bone marrow )MSC S 表达MHC-I类分子,不表达MHC-II 类分子,不表达CD80、CD86、CD40等协同刺激分子,体外抑制混合淋巴细胞反应,体内诱导免疫耐受[11, 15],在预防和治疗移植物抗宿主病、诱导器官移植免疫耐受等领域有较好的应用前景;(4)连续传代培养和冷冻保存后仍具有多向分化潜能,可作为理想的种子细胞用于组织工程和细胞替代治疗。1974年Friedenstein [16] 首先证明了骨髓中存在MSC S ,以后的研究证明MSC S 不仅存在于骨髓中,也存在 于其他一些组织与器官的间质中:如外周血[17],脐血[5],松质骨[1, 18],脂肪组织[1],滑膜[18]和脐带。在所有这些来源中,脐血(umbilical cord blood)和脐带(umbilical cord)是MSC S 最理想的来源,因为它们可以通过非侵入性手段容易获 得,并且病毒污染的风险低,还可冷冻保存后行自体移植。然而,脐血MSC的培养成功率不高[19, 23-24],Shetty 的研究认为只有6%,而脐带MSC的培养成功率可 达100%[25]。另外从脐血中分离MSC S ,就浪费了其中的造血干/祖细胞(hematopoietic stem cells/hematopoietic progenitor cells,HSCs/HPCs) [26, 27],因此,脐带MSC S (umbilical cord mesenchymal stem cells, UC-MSC S )就成 为重要来源。 一.概述 人脐带约40 g, 它的长度约60–65 cm, 足月脐带的平均直径约1.5 cm[28, 29]。脐带被覆着鳞状上皮,叫脐带上皮,是单层或复层结构,这层上皮由羊膜延续过来[30, 31]。脐带的内部是两根动脉和一根静脉,血管之间是粘液样的结缔组织,叫做沃顿胶质,充当血管外膜的功能。脐带中无毛细血管和淋巴系统。沃顿胶质的网状系统是糖蛋白微纤维和胶原纤维。沃顿胶质中最多的葡萄糖胺聚糖是透明质酸,它是包绕在成纤维样细胞和胶原纤维周围的并维持脐带形状的水合凝胶,使脐带免受挤压。沃顿胶质的基质细胞是成纤维样细胞[32],这种中间丝蛋白表达于间充质来源的细胞如成纤维细胞的,而不表达于平滑肌细胞。共表达波形蛋白和索蛋白提示这些细胞本质上肌纤维母细胞。 脐带基质细胞也是一种具有多能干细胞特点的细胞,具有多项分化潜能,其 形态和生物学特点与骨髓源性MSC S 相似[5, 20, 21, 38, 46],但脐带MSC S 更原始,是介 于成体干细胞和胚胎干细胞之间的一种干细胞,表达Oct-4, Sox-2和Nanog等多

the-disadvantages-and-advantages-of-advertisement

With the development of material prosperity, advertisements have become more and more important in our daily life. Advertisements give latest information about products. Generally speaking, advertisements can be divided into two types on the basis of its purpose: public relation ads and commercial ads. Public relation ads tries to advocate reputation for a social group, whose purpose is to leave a favorable impression upon the potential audience. A public relation advertisement is often sponsored by or for a charitable institution, civic group, or religious or political organization. The primary goal of public relation advertisements is to arouse people to pay attention to social organization, so as to get the support and favor, and create a favorable environment for its. protecting environment, help others and so on .Also, some public service advertisements are really good and benefit for our “home”. They can make us think deeply and tell the duty of us. On the other hand, ads cause many problems, because of company’s false propaganda(虚假宣传). In order to make more money, many factories don’t concern the

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脐带血造血干细胞库管理办法(试行)

脐带血造血干细胞库管理办法(试行) 第一章总则 第一条为合理利用我国脐带血造血干细胞资源,促进脐带血造血干细胞移植高新技术的发展,确保脐带血 造血干细胞应用的安全性和有效性,特制定本管理办法。 第二条脐带血造血干细胞库是指以人体造血干细胞移植为目的,具有采集、处理、保存和提供造血干细胞 的能力,并具有相当研究实力的特殊血站。 任何单位和个人不得以营利为目的进行脐带血采供活动。 第三条本办法所指脐带血为与孕妇和新生儿血容量和血循环无关的,由新生儿脐带扎断后的远端所采集的 胎盘血。 第四条对脐带血造血干细胞库实行全国统一规划,统一布局,统一标准,统一规范和统一管理制度。 第二章设置审批 第五条国务院卫生行政部门根据我国人口分布、卫生资源、临床造血干细胞移植需要等实际情况,制订我 国脐带血造血干细胞库设置的总体布局和发展规划。 第六条脐带血造血干细胞库的设置必须经国务院卫生行政部门批准。 第七条国务院卫生行政部门成立由有关方面专家组成的脐带血造血干细胞库专家委员会(以下简称专家委

员会),负责对脐带血造血干细胞库设置的申请、验收和考评提出论证意见。专家委员会负责制订脐带血 造血干细胞库建设、操作、运行等技术标准。 第八条脐带血造血干细胞库设置的申请者除符合国家规划和布局要求,具备设置一般血站基本条件之外, 还需具备下列条件: (一)具有基本的血液学研究基础和造血干细胞研究能力; (二)具有符合储存不低于1 万份脐带血的高清洁度的空间和冷冻设备的设计规划; (三)具有血细胞生物学、HLA 配型、相关病原体检测、遗传学和冷冻生物学、专供脐带血处理等符合GMP、 GLP 标准的实验室、资料保存室; (四)具有流式细胞仪、程控冷冻仪、PCR 仪和细胞冷冻及相关检测及计算机网络管理等仪器设备; (五)具有独立开展实验血液学、免疫学、造血细胞培养、检测、HLA 配型、病原体检测、冷冻生物学、 管理、质量控制和监测、仪器操作、资料保管和共享等方面的技术、管理和服务人员; (六)具有安全可靠的脐带血来源保证; (七)具备多渠道筹集建设资金运转经费的能力。 第九条设置脐带血造血干细胞库应向所在地省级卫生行政部门提交设置可行性研究报告,内容包括:

Advantages(优点) and disadvantages (缺点)of private cars

Advantages(优点) and disadvantages(缺点)of private cars(私人汽车). With the fantastic(奇异的,稀奇古怪的,空想的)spur(刺激) both in industry(工业,产业) and in economy in China, the number of people who own private cars is on the rise. Some people have bought cars of their own, and others are planning to buy cars. But there have been two quite different views on this phenomenon(现象). Some claim(主张) that there are many advantages brought about by cars. First, the automobile(汽车) industry provides jobs for countless(无数的) workers and strong support for other industries. Second, if conditions permit, owning a car can make us work more efficiently(有效率的). Finally, life will become more convenient(方便的,便利的). A car allows one to move freely and with a car there is no need to wait for the bus in the cold or under the burning sun. However, others strongly object to(反对) the increase in developing private cars. They hold that automobiles will give rise to a series of(一连串的)problems. In the first place, as more and more cars are produced and run in the street, a large volume (大量) of poisonous gas(有毒气体) will be given off, polluting(污染) the atmosphere(大气) and causing actual(实际的\真实的\现行的\目前的)harm(伤害\损害) to the health of people. Next, private cars contribute to(捐献) traffic congestion(拥塞\充血) so greatly that the advantages gained in comfort and freedom are often cancelled(抵偿) out by the frustration(挫折)caused by traffic jams(交通阻塞). The last problem is the increasing number of car accidents that have killed and will kill a lot of people in a friction(摩擦) of a second. In my opinion, although automobiles have been playing a vital(至关重要的) part in the daily activities(日常生活) of our society, they also bring us numerous(众多的\无数的) troubles such as more serious environmental pollution(环境污染), more traffic accidents and more energy consumption(能量消耗). They drink up huge amounts of(大量的)fuel(燃料) and throw out huge amounts of pollutants(污染物质). Traffic accidents kill thousands and thousands of people each year and cripple(n.瘸子、v.削弱) more. Jams(短裤睡衣、宽短裤)waste our precious time. Therefore I am against developing private cars. Some people claim(主张) that the disadvantages of the car are more than the advantages. Do you agree or disagree?

水准仪及其测量方法

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