化学工程

In time of realizing moderate unglue hemp, it developed a series of new products like low polymeric xylose, pectin, environmental fiberboard and organic manure that reaches delamination and multilevel use of hemp's combination and disassembly.

技术特点：1、项目基于大麻纤维和麻杆等化学组成和结构的差异，开发了环境友好的汽爆新技术，为实现大麻的清洁、高效全利用奠定了基础。2、建立的大麻清洁脱胶方法，既提高了麻皮纤维的制成率和分裂度，又不损伤纤维结构，显著提高了大麻的可纺性，是一种创新的大麻脱胶技术。3、提出了利用大麻杆无胶制备环保型纤维板的方法，解决了成本高和二次污染问题。4、该项目突破依靠单一技术或单一组分利用的技术路线，按照生态工程原理，建立了大麻产品深加工利用的技术体系和综合利用新工艺，在实现麻皮纤维适度脱胶的同时，开发了低聚木糖、果胶、环保型纤维板和有机肥料等系列新产品，达到了大麻组分的分层多级利用。

Lots of new production technologies to enhance the competitive power of products have worked out in China's companies such as technologies for producing vitamin C manufactured via two-step zymosis; synthesizing chemically vitamin E with the domestically produced key intermediates linalool, isophytol and trimethylphenol; preparing vitamin B2 gained by genetically engineered bacterium fermentation, and commercialized production of vitamin H, etc.

我国企业研究出许多维生素生产新工艺，提高了产品的竞争力，开发的新工艺有两步发酵法生产维生素C，化学合成维生素E的关键中间体芳樟醇、异植物醇和三甲基苯酚等原料国产化，基因工程菌发酵生产维生素B2，维生素H的工业合成等。

Chemical analysis and toxic tests were combined with benthic macro invertebrates community structure alternations. Based on tri-axial graphs together with relevant matrix of decision-making, the initial bio-responsive sediment quality criteria clearly indicated the situation of heavy metal pollution, and showed the dose-response relationships between heavy metal contamination and benthic biotics. Moreover, the SQC may provide some basic material for establishment of sediment quality standards and for follow-up remediation engineering in the area.

通过将化学分析、毒性鉴定和底栖群落结构变化三基元集成为一体的三轴图和相应的响应信息判断矩阵，基于现场生物响应的沉积物质量基准能较为清晰地指示乐安江流域表层沉积物中重金属污染的相对程度和分布模式，体现底栖生物对沉积物重金属污染的剂量-响应关系，为进一步制订该区域沉积质量管理标准、开展后续的污染治理与恢复工程提供技术保证和科学依据

Chemical analysisC and toxic testsT were combined with benthic macro invertebrates community structure alternationsB. Based on tri-axial graphs together with relevant matrix of decision-making, the initial bio-responsive sediment quality criteria clearly indicated the situation of heavy metal pollution, and showed the dose-response relationships between heavy metal contamination and benthic biotics. Moreover, the SQC may provide some basic material for establishment of sediment quality standardsSQS and for follow-up remediation engineering in the area.

通过将化学分析C、毒性鉴定T和底栖群落结构变化B三基元集成为一体的三轴图和相应的响应信息判断矩阵，基于现场生物响应的沉积物质量基准能较为清晰地指示乐安江流域表层沉积物中重金属污染的相对程度和分布模式，体现底栖生物对沉积物重金属污染的剂量-响应关系，为进一步制订该区域沉积质量管理标准 SQS、开展后续的污染治理与恢复工程提供技术保证和科学依据

By Percoll fluid and density gradient centrifugation,the MSC was obtained;after the cells filled the bottom of vessel,subcultured them,when they subculture in third generation ,redigested them,500 R/min centrifugate,alter the

经percoll液密度梯度离心法能获得纯度较高的人骨髓间充质干细胞，这种细胞在体外培养体系中保持旺盛的增殖能力；经轻度离心和化学限定培养基法可诱导骨髓间充质干细胞向成软骨方向分化，增殖旺盛，可传一代培养，是软骨组织工程理想的种子细胞。

Institute of Physical Chemistry,College of Chemistry and Molecular Engineering ,State Key Laboratory for Structural Chemistry of Unstable ＆ Stable Species,Pek ing University,Beijing 100871;Department of Biophysics,The School of Basic Medical Sciences,Peking University,Beijing 100083;Institute of Organic Chemis try,Chinese Academy of Sciences,Shanghai 200032

高峰；沙印林；邱阳；王跃丰；李银玲；来鲁华；吴厚铭北京大学物理化学研究所，化学与分子工程学院分子动态与稳态国家重点实验室，北京 100871；北京大学基础医学院，生物物理系，北京 100083；中国科学院上海有机化学研究所，上海 200032

Objective: To examine the property and proliferation ability of primary culturing MSC, investgate the effect of lightly centrifugation and chemical definition medium to induce MSC differentiate into chondroblast.

目的：了解骨髓基质干细胞原代培养的特性及增殖能力，探讨轻度离心和化学限定培养基法诱导骨髓基质干细胞向成软骨方向分化的作用；为软骨组织工程提供足量、合适的种子细胞。

MSC can be obtained by percoll fluid and density gradient centrifugation, this cells kept proliferation and differentiation ability in vitro; MSC can differentiate into chondroblast by lightly centrifugation and chemical definition medium, after one generation, the differential cells kept the phentype of chondroblast, they are a kind of ideal seed-cells for cartilage tissue engineering.

经percoll液密度梯度离心法能获得纯度较高的人骨髓间充质干细胞，这种细胞在体外培养体系中保持旺盛的增殖能力；经轻度离心和化学限定培养基法可诱导骨髓间充质干细胞向成软骨方向分化，增殖旺盛，可传一代培养，是软骨组织工程理想的种子细胞。

This investigation include two parts: lThe primary culture, chondroblast induction and evaluation of MSC. 2The chondroblast cultured with compound porous materials PDLLA and PDLLA/chitosan.

第一部分人骨髓基质干细胞的原代分离、体外培养、成软骨诱导及鉴定目的：了解骨髓基质干细胞原代培养的特性及增殖能力，探讨轻度离心和化学限定培养基法诱导骨髓基质干细胞向成软骨方向分化的作用；为软骨组织工程提供足量、合适的种子细胞。

The soybean-protein fiber was developed by Li-Guanqi who is the member of the HuaKang group that is united with chemistry bioengineering in Pu Yang, HeNan province. The producer stuff of the soybean-protein fiber primarily contains beans dregs, hydroxyl and cyanic acid high polymer. Its production principle: First, soaking beans dregs into water and purifying out soybean-protein from the solution.

大豆蛋白改性纤维是由河南省濮阳华康化学生物工程联合集团公司李官奇等研制并生产的一种新型纺织纤维，它的主要生产原料是豆粕、羟基和氰基高聚物，其生产原理是将豆粕水浸分离提纯出蛋白质，将蛋白质改变空间结构并在适当的条件下与羟基和氰基高聚物共聚接枝，通湿法纺丝生成。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。