Jul 17

病毒大战:千年病毒变异 摧毁人体免疫系统疾病

作者: 如果爱 iflove.com 人文传奇

病毒大战:现代的生活方式给病菌家族带来了空前的繁荣。在不远的将来,人类肯定还要面对一场更大规模的病毒大战。但人类对病毒并非束手无策。经过不懈努力,人类在这个领域已经取得了显著成绩。那么,人类该如何防范病毒呢,怎样才能有效预防疾病呢,如何在病毒变异之前将其通盘扼杀呢?《病毒大战:千年病毒变异 摧毁人体免疫系统疾病》,如果爱www.iflove.com隆重推出,精彩不容错过,敬请关注!Coming up next, Virus Attacks: Old Virus Mutations and Fitness for Survival. Here we shall pay attention to it now.

病毒入侵人体免疫系统

病毒入侵人体免疫系统

中文解说词:病毒大战:千年病毒变异 摧毁人体免疫系统疾病
English Title: Virus Attacks: Old Virus Mutations and Fitness for Survival
撰稿:陈家伟 字数:1295字

关键词:传奇纪录片下载,纪录片,蠕虫病毒,电脑病毒,病菌,免疫系统疾病,艾滋病症状,细菌,疾病查询,猪流感,甲型H1N1流感病毒
翻译说明:细胞免疫大战——免疫细胞大战甲型H1N1猪流感病毒。本文为中英文对照,上文为中文,下文为英语翻译。如果出现中英语翻译不对称现象,恳请读者和观众在后面留言评论中指出,感激ing:)
Keywords: documentary, documentary-download, virus, Computer Virus, germ, immune system, AIDS, Bacteria, Disease, Disease Prevention, swine flu, h1n1 swine flu

亲爱的宝贝,在社会进步的同时,您是否注意到,现代的生活方式带来了病菌家族的空前繁荣?人类在消灭了天花、霍乱、伤寒和肺结核后,艾滋病又横行于世。那些看不见、摸不着的小东西可以毫不费力地摧毁人体的免疫系统疾病,夺走宝贵的生命。在今天的如果爱www.iflove.com电视纪录片中,我们将带领大家走到显微镜下,观察这些病毒是如何向人类发起攻击的。

H1N1 VIRUS MUTATIONS AND FITNESS FOR SURVIVAL

Thesis Paper: H1N1 viruses exploit all known mechanisms of genetic variation to ensure their survival. Distinctive features of H1N1 virus replication include high mutation rates, high yields, and short replication times. As a consequence, H1N1 viruses replicate as complex and dynamic mutant swarms, called viral quasispecies. Mutation rates at defined genomic sites are affected by the nucleotide sequence context on the template molecule as well as by environmental factors. In vitro hypermutation reactions offer a means to explore the functional sequence space of nucleic acids and proteins.

The evolution of a viral quasispecies is extremely dependent on the population size of the virus that is involved in the infections. Repeated bottleneck events lead to average fitness losses, with viruses that harbor unusual, deleterious mutations. In contrast, large population passages result in rapid fitness gains, much larger than those so far scored for cellular organisms. Fitness gains in one environment often lead to fitness losses in an alternative environment. An important challenge in H1N1 virus evolution research is the assignment of phenotypic traits to specific mutations. Different constellations of mutations may be associated with a similar biological behavior.

In addition, recent evidence suggests the existence of critical thresholds for the expression of phenotypic traits. Epidemiological as well as functional and structural studies suggest that H1N1 viruses can tolerate restricted types and numbers of mutations during any specific time point during their evolution. Viruses occupy only a tiny portion of their potential sequence space. Such limited tolerance to mutations may open new avenues for combating viral infections.

病毒大战:人体免疫系统大战蠕虫病毒。起初,人类的疾病不会流行,是大城市的兴起使其成为可能。随着人口的不断增长和聚集,病毒迅速蔓延。它们的传播途径各有不同,就连军队和医院也成了被利用的场所。而且,旧的病毒刚刚被疫苗和抗生素消灭,新的病毒又出现了。有人预言说,在不远的将来,人类肯定要面对一场更大规模的病毒大战。这场病毒大战将不止是电脑病毒的变异,而是蠕虫病毒的大规模蠢蠢欲动。怎么样,害怕了吧?

更加令人头痛的是,病毒具有变异能力。但人类对病毒并非束手无策。经过不懈努力,人类在这个领域已经取得了显著成绩。那么,人类该如何防范病毒呢,怎样才能有效预防疾病呢,如何在病毒变异之前将其通盘扼杀呢?好,现在就让我们打开如果爱www.iflove.com,一起到电影纪录片中寻找答案吧!

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