Candida shehatae gene xyl1 and Pichia stipitis gene xyl2,encoding xylose reductase(XR)and xylitol dehydrogenase(XD)respectively,were amplified by PCR.The genes xyl1 and xyl2 were placed under the control of promoter G...Candida shehatae gene xyl1 and Pichia stipitis gene xyl2,encoding xylose reductase(XR)and xylitol dehydrogenase(XD)respectively,were amplified by PCR.The genes xyl1 and xyl2 were placed under the control of promoter GAL in vector pYES2 to construct the recombinant expression vector pYES2-P12.Subsequently the vector pYES2-P12 was transformed into S.cerevisiae YS58 by LiAc to produce the recombinant yeast YS58-12.The alcoholic ferment indicated that the recombinant yeast YS58-12 could convert xylose to ethanol with the xylose consumption rate of 81.3%.展开更多
[目的]筛选出品质较好的荷叶山楂酸奶配方.[方法]在酸奶中加入荷叶汁和山楂汁,开发兼具荷叶山楂保健功能的酸奶,通过单因素和正交试验确定酸奶的最优配方.[结果]试验得出荷叶山楂酸奶最佳配方为荷叶汁添加量70 m L/L,山楂汁添加量60 m L...[目的]筛选出品质较好的荷叶山楂酸奶配方.[方法]在酸奶中加入荷叶汁和山楂汁,开发兼具荷叶山楂保健功能的酸奶,通过单因素和正交试验确定酸奶的最优配方.[结果]试验得出荷叶山楂酸奶最佳配方为荷叶汁添加量70 m L/L,山楂汁添加量60 m L/L,接种量4%,木糖醇添加量100 g/L,此时的酸奶感官品质最佳.[结论]经测定,酸奶的各项理化指标和微生物指标符合国家标准,可为保健酸奶的开发提供新思路.展开更多
Stable output increaseThe rapid development of the iron andsteel industry in China has promoteddramatic growth in the output of cokein recent years.But with the impact ofmacro economic controls and environ-mental prot...Stable output increaseThe rapid development of the iron andsteel industry in China has promoteddramatic growth in the output of cokein recent years.But with the impact ofmacro economic controls and environ-mental protection,the 2006 output ofcoke was 281 million tons,an increaseof 20.6% over 2005-growth had sloweddown.Hebei province,Inner Mongolia,展开更多
On July 11th,UOP LLC,a Honeywell (NYSE:HON) company,an-nounced that PetroChina Sichuan Petrochemical Co.,Ltd.,a subsidiary of PetroChina Company Limited,has selected UOP to supply technology,basic engineering services...On July 11th,UOP LLC,a Honeywell (NYSE:HON) company,an-nounced that PetroChina Sichuan Petrochemical Co.,Ltd.,a subsidiary of PetroChina Company Limited,has selected UOP to supply technology,basic engineering services and equipment for a new inte-grated refining and petrochemicals complex to be installed at its展开更多
基金supported by the National High Technology Research and Development Program of China (Nos.2002AA514010,2001AA514024).
文摘Candida shehatae gene xyl1 and Pichia stipitis gene xyl2,encoding xylose reductase(XR)and xylitol dehydrogenase(XD)respectively,were amplified by PCR.The genes xyl1 and xyl2 were placed under the control of promoter GAL in vector pYES2 to construct the recombinant expression vector pYES2-P12.Subsequently the vector pYES2-P12 was transformed into S.cerevisiae YS58 by LiAc to produce the recombinant yeast YS58-12.The alcoholic ferment indicated that the recombinant yeast YS58-12 could convert xylose to ethanol with the xylose consumption rate of 81.3%.
文摘[目的]筛选出品质较好的荷叶山楂酸奶配方.[方法]在酸奶中加入荷叶汁和山楂汁,开发兼具荷叶山楂保健功能的酸奶,通过单因素和正交试验确定酸奶的最优配方.[结果]试验得出荷叶山楂酸奶最佳配方为荷叶汁添加量70 m L/L,山楂汁添加量60 m L/L,接种量4%,木糖醇添加量100 g/L,此时的酸奶感官品质最佳.[结论]经测定,酸奶的各项理化指标和微生物指标符合国家标准,可为保健酸奶的开发提供新思路.
文摘Stable output increaseThe rapid development of the iron andsteel industry in China has promoteddramatic growth in the output of cokein recent years.But with the impact ofmacro economic controls and environ-mental protection,the 2006 output ofcoke was 281 million tons,an increaseof 20.6% over 2005-growth had sloweddown.Hebei province,Inner Mongolia,
文摘On July 11th,UOP LLC,a Honeywell (NYSE:HON) company,an-nounced that PetroChina Sichuan Petrochemical Co.,Ltd.,a subsidiary of PetroChina Company Limited,has selected UOP to supply technology,basic engineering services and equipment for a new inte-grated refining and petrochemicals complex to be installed at its
