简介：AcomputerscientistatWashingtonUniversityinSt.Louishasdevelopedawaytocoaxcellstodonaturalthingsunderunnaturalcircumstances,whichcouldbeusefulforstemcellresearch,genetherapyandbiofuelproduction.MichaelBrent,theHenryEdwinSeverProfessorofEngineeringintheSchoolofEngineering&

简介：在这研究，数字图象关联(DIC)被采用评估牛的蹄角的机械性质。用特定的过程，张力的标本地区包括了4脚底和5从前面的爪和一头成熟黑安格斯奶牛的后面的蹄被切除。在抽取以后，标本被调节与任何一个0%的相对潮湿内容获得角(干燥)或100%(湿)然后使遭到了到单轴的紧张到失败。所有“干燥”、“湿”的蹄角的平均有弹性的模量(E)是2870瑵漠?潦吗？

简介：INTRODUCTIONPolyhydroxybutyrate(PHB)andit'scopolymerPHBVachievedbythebiosyntheticpathway,hasattractedmuchattentionasanalternationbiodegradablematerials.Theyhavetheexcellentbiocompatibilityandproperdegradationperiodsbyoptimizationofpertinentmolecularweightandcopolymercompositions.