生物-社会的

Description: This is the homepage of the Department of Biological Sciences of University of Pittsburgh.

网站描述：这是匹兹堡大学生物科学系的网页。

AIM: To study the architecture of human plaque biofilm.

目的：研究菌斑生物膜的结构。

Cytokines are small, soluble proteins with pleiotropic effects on a variety of cell types.

细胞因子是具有多种生物活性的可溶性小分子蛋白质。

Because of ovary and spermary not developing in babyhood, the estrogen in serum is mainly from adrenal, and the low level of estrogen persists until prepuberty.

雌激素是一类具有广泛生物活性的甾体激素，主要由卵巢分泌，睾丸及肾上腺也能分泌少量。

Objective To develop a rapid diagnostic method for prokaryotic organism infection.

目的 建立一种可以用于支原体、细菌等原核生物感染的快速诊断方法。

Chemical Composition More than 180 compounds have been identified in propolis, and many are biologically active.

蜂胶中含有超过180种化学成分，大多数是具有生物活性的成分。

Ecological basis and application of PFU protozoan community in bio-monitoring with relation to water quality ［J］.

PFU原生动物群落生物监测的生态学原理与应用［J］。

Excepting the conventional methods of surveying samples, such as simple random sampling, stratified sampling, cluster sampling, systematic sampling, liner regression sampling, ratio estimator, two-stage sampling, double sampling, rotate sampling, non-probability sampling, there is sequential sampling and mark-recapture, particularly mark-recapture was introduced in detail.

针对生物资源的调查，除了一般抽样方法如：简单随机抽样、分层抽样、整群抽样、系统抽样、双重抽样、二阶抽样、样本轮换、比率估计、线性回归抽样和不等概抽样，还有序贯抽样和标记-重捕获方法，这里特别详细介绍了标记-重捕获方法。

However, we can reconstitute the biosynthetic pathway by supplying the cells with catalytically active polypeptides.

但是，我们可以通过向细胞簇提供催化活性肽来重建生物合成的途径。

The first replicator was the gene – the basis of biological evolution.

第一复制因子是指基因——生物进化的基础。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。