生物学论文的英文摘要

生物学论文的英文摘要

Abstract: Flammulina velutipes polysaccharides have many health benefits for human being, making it a magnificent value for development. Flammulina velutipe offcuts are low-cost and can be extracted with polysaccharide and activated carbon. This experiment in primary studies extracting polysaccharide and a process of preparation of activated carbon from flammulina velutipe cutoffs by using hot water. Through single-factor and SAS optimization design, an optimal condition of having polysaccharide is obtained: an extraction temperature of 100 ℃, a pH of 5.9, a solid-liquid ratio of 1:15 and a leaching period of 3.47 h. The polysaccharide extraction yield acquired is 42.65 mg/g which has 3.8 times increase in comparison to the last optimization; With single factor optimization, the optimum condition of using microwave carbonization to prepare activated carbon is achieved: 50% phosphoric in activation for 8 hours, medium baking and carbonization for 5 min. the achieved activated carbon has a capacity of adsorbing methylene in 81.22 mg/g, with an adsorption rate of 95.33%. This study provides theoretical basis and technical supports for Flammulina velutipe cutoff resource development.

Keywords: Flammulina velutipe cutoffs, Flammulina velutipe polysaccharide, activated carbon, extraction

求一篇关于细胞生物学的英文论文

?filename=SWJS200405001144&dbname=CPFD2004【论文摘要】 肿瘤是危害人类的恶性疾病,人们对此高做了大量研究工作,然对其认识未产生质的飞跃,越来越多证据显示肿瘤发生与干细胞发育异常有密切的关系。本文从干细胞理论概述了干细胞与肿瘤发生的关系及干细胞工程在肿瘤治疗中的应用前景。 【英文论文摘要】 Tumor is one of deadly diseases to mankind. Up to now, it is known little about its mechanism. Stem cell biology has come of age. More and more evidences show the close relationship between tumor genesis and abnormal development of stem cell. This shot view intends to give a general overview on relationship between tumor and stem cells, and prosperity for tumor recovery. 建议你用教育网来下载，是免费的，不然就要收费~~~（是中国知网哦~~） 答案补充 你用教育网上，就可以免费下载了。就是在高校的网络下载

求助生物学论文摘要的英文翻译~~谢谢！拜托高手帮我翻译一下

Objective: To β △ thyroid hormone receptor gene in rats in the distribution of different characteristics, and is familiar with using PT-PCR analysis of the results. Method: TR β △ gene were expressed in a variety of organizations, including the liver, brain, skeletal muscle, heart, kidneys express the most. From various organizations in the mRNA, to extract the mRNA as a template retroviral cDNA synthesis of the first chain. And the template for PCR amplification TR β △ double-stranded cDNA. According to the purpose of gene transcription design of the two primers. Using fluorescence quantitative PCR method of quantitative analysis. Results: The Organization of extracting RNA, OD260/OD280 are between 1.7-2.0 between, OD260/230 range between 1.5-1.9. Identification of agarose gel electrophoresis of PCR results showed that in the expected around about 160 bp PCR products with a purpose. TR βΔ PCR product of the identification of agarose gel electrophoresis results showed that the PCR amplification of DNA molecular size to 176 bp for the purpose of the zone. Manager gene and gene quantitative determination of its amplification curve and no dissolution of miscellaneous peak, while the corresponding peak melting song Tm value and amplified products similar to the theory of Tm. Conclusion: The results showed that TR β △ gene expression at the mRNA level of a certain spatial distribution of characteristics: the liver, brain, spleen, kidney tissue in both the gene expression, the expression and spleen was significantly higher than that of other organizations.