Simian immunodeficiency virus (SIV) is a species of retrovirus that cause persistent infections in at least 45 species of non-human primates.

给定一个预层，我们总可以构造一个层，即预层的层化 (sheafification). 令 S\stackrel {p} {\rightarrow}X 是满的连续映射，并且具有一个连续的横截 (section) X\stackrel {s_0} …

Simian immunodeficiency viruses (SIV) are members of the Lentivirus genus of Retroviruses that infect nonhuman primates such as monkeys, chimpanzees, and gorillas. For the most part, …

他先在一种允许有奇点的Stein复流形上引入了十分重要的coherence sheaf的概念(它可以看成是纤维丛的某种模拟)，凝聚层的上同调群具有十分良好的性质。 接着塞尔又看出层论也可以用在 …

定义2'层(Sheaf) 设 X,\mathcal F 是拓扑空间, \pi:\mathcal F\rightarrow X 满足. 1) \pi 是满射. 2) \pi 是局部同胚，即任何一点( X 的点或 \mathcal F 的点),均存在它的一个开邻域和它的像点(或某 …

Simian immunodeficiency viruses (SIVs) are primate lentiviruses that infect no fewer than 36 different nonhuman primate species in sub-Saharan Africa (4, 9, 62).

Simian immunodeficiency viruses (SIV) are a group of genetically related viruses belonging to the lentivirus subgroup of retroviruses. The natural hosts of SIV include many species of African …

2010年8月24日 · Sequencing the capsid region of “escaped” viruses showed novel mutations in the amino acid sequence of macaque-adapted, TRIM5-resistant SIV that are not present in …

2024年8月3日 · Explore the structure, transmission, and evolution of Simian Immunodeficiency Virus and its impact on host immune response and current research. Originating in primate …

2014年3月19日 · Here, we review current knowledge about the genetic diversity, molecular epidemiology, prevalence, and pathogenicity of simian immunodeficiency viruses (SIVs). SIVs …