生物学的

Objective: To study osteogenic capability of rabbit bone marrow stromal cells and biological characteristical identification in vitro in order to explore the appropriate methods of osteoblast culture in vitro and to select an idea source of seed cells for bone tissue engineer.

目的：研究兔骨髓基质细胞在体外培养条件下的成骨能力及生物学特性，探讨简便易行的成骨细胞体外培养方法，为组织工程选择理想的种子细胞来源。方法：取新西兰白兔骨髓液经离心后得骨髓单个核细胞，以1× 106／ml的细胞浓度进行培养，经传代培养，选择条件培养液培养(1640完全培养液中加入地塞米松10-8Smol／l，β-甘油磷酸钠10mmol／l，VitC 50μg／ml)作为骨髓基质细胞增殖和成骨的调节因子，通过倒置显微镜、HE染色、扫描电镜、碱磷酸酶(alkaline phosphatase，ALP)测定、Ⅰ型胶原免疫组化染色和四环素荧光钙染色等手段对获得的细胞进行生物学特性研究。

We thus arrive at the serious biological paradox flippantly termed the RRR retractable roller skates.

这样， 的严肃的生物学悖论：子呢这样，我们便得出了一个被戏称为 RRR 的严肃的生物学悖论：大自然未能产生出有可伸缩的滑轮这样溜冰鞋的老鼠。

Biodiversity is one of the front areas of current biological research. The mechanisms of the formation, spatial distribution pattern, conservation and utilization of biodiversity have been an important area of biological and environmental research. In this study, through analyses of data about plant diversity, animal diversity, geographic factors, climatic factors, and energy factors by use of GIS software, statistic software and ecology software, the mainland of China was divided into 241 small districts of 2° by 2°. The environmental factors in each district were analyzed and isopleth maps of environmental elements were depicted.

生物多样性是当今生物学研究的热点问题之一，生物多样性的形成机制和分布格局以及保护利用问题一直是生物学和环境科学所研究的重要内容，本文由此出发，以中国陆地为研究区域，通过植物多样性数据、动物多样性数据、地理因子、气候因子、能量因子等资料，利用MAPGIS、MAPINFO等GIS软件，SPSS、DPS等统计学软件以及CANOCO等生态学软件，将中国陆地划分为241个小区，分析了各区内的环境特点，统计了各区内生物多样性的数量，并绘出环境因子等值线图，中国陆地种子植物科、属、种，裸子植物种、蕨类植物种、兽类、鸟类、爬行类、两栖类种数的等值线分布图，对中国陆地植物、动物多样性现状、分布格局及与环境因子的关系进行了研究。

Based on the Markov chain, the transitive law of the plastid in the splitting process of the cell in biology was first studied and then the pure composition probability of the cell was discussed in detail, including the deletion plastids and the transformation between the different states of the cell.

以随机过程为研究工具研究了生物学中质体随细胞分裂而传递的规律，通过数学建模对含突变质体的杂合细胞的纯合概率和细胞的不同状态之间的转移在生物学意义上进行了详细的讨论。

Third, with the fuse of Supervention, this paper will develop further by the integration of biology and physics, the unification of Physics and Biology in new scientific paradigm. As we all know, scientific theories in each stage of the history are the most perfect knowledge on nature, but with the rapid development of science and technology, it will inevitably face the challenges of the new theory and absorb the reasonable elements in new theory.

三、附随发生问题引发的学科问题，本文将附随发生问题作为导火线，进一步从生物学与物理学的融合、物理学与生物学在新科学范式下的统一展开，得出每一历史阶段的科学理论都是当时知识体系对自然界最完满的解释，科技发展日新月异，它必然会面对新理论的挑战且吸收新理论当中合理的成份。

Oh, I mean the real interpretative biology, from the ground up, from the laboratory the test-tube the vitalized inorganic right on up to the widest aesthetic sociological generalizations.

我指的是如实地诠释着生命的生物学，从基础开始，从实验室、试管和获得 s sbb ww 了生命的无机物开始直到美学和社会学的广泛8 tt t8结论的生物学。

The Exobiology Branch conducts research in Exobiology seeking to increase our knowledge of the origin, evolution, and distribution of life in the universe, such as chemical evolution occur in the primitive bodies of the solar system, evidence regarding the early interplay between biological and environmental evolution, and molecular fossils about early microbial evolution so on.

外太空生物学分部致力于研究外太空生物学，探索宇宙生命的起源，演化和分布，例如太阳系最初生命的化学演化，有关早期生物和环境的演化相互影响的证据，以及有关早期微生物进化的分子化石等。

Our group is interested in plant secondary metabolism and cotton biology. Current research projects include characterization of transcription factors and small RNAs involved in controlling cotton fiber and Arabidopsis development; investigation of terpenoid biosynthesis, particularly in Artemisia annua; and genetic engineering of cotton fiber development, plant resistance to insects, and artemisinin production.

利用遗传学、发育生物学、生物化学和分子生物学等手段克隆和鉴定参与叶形态建成的重要基因，解析它们之间的互作关系，了解叶形态建成的基因调控网络，认识叶形态建成的分子调控机理，为创制具有理想叶片形态的作物遗传改良品种提供理论基础和技术支撑。

The journal publishes original research on the evaluation and characterization of teratogens, carcinogens, or mutagens; reports describing the development of novel experimental techniques for toxicological assessment, or the application of current methods in molecular and cellular biology (including in vitro studies, organ and cell culture, and the use of transgenic animals); as well as critical reviews focused on topics of significant interest to specialists in teratology, cancer biology, and mutation research.

杂志刊有关载致畸剂，致癌物质和诱变剂的评估和特征方面的原始研究；描述毒物评定的实验新技术，或当前方法在分子和细胞生物学（包括体外研究，器官和细胞培养，和转基因动物）中应用的报告；以及对畸形学，癌生物学，和突变研究中生物学家非常感兴趣课题的评论。

ND-1 scFv was labeled with 〓Tc by MTD.〓Tc-ND-1 scFv was injected into mice bearing the CCL-187 xenograft for biodistribution study, radioactivity in blood, tumor and normal tissue was determinated at various time periods following injection by a gamma scintillation counter, and the ratios of radioactivity between tumor tissue and normal tissue were evaluated. Radioactively- labled scFv displayed rapid localization in tumors. Accumulation was found in tumors in high concentrations 1 hour after injection, and scfv uptake in tumor was 2.6 times higher than in blood. The T/NT for blood, liver, spleen , hear, lung and kidney were 2.61, 1.85 1.94, 1.75, 0.83 and 0.22 respectively.

将ND-1scFv与同位素〓Tc偶联制备〓Tc-ND-1scFv，注入荷瘤裸鼠体内，观察了偶联物的体内生物学分布，结果显示，〓Tc-ND-1scFv在荷瘤裸鼠体内的生物学分布带有明显的肿瘤积聚趋向，注射1小时后即可选择性地积聚于肿瘤组织，其放射性明显高于大多数正常组织，除肾脏和肺外T/NT值均大于1.2，而完整的ND-1完成同样的积聚则需要20-24小时。

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。