基于1993—2024年松辽流域225个国家常规气象站的逐日降水数据和来自NOAA(National Oceanic and Atmospheric Administration)不同分辨的CMAP(CPC Merged Analysis of Precipitation)和CPC(CPC Global Unified Gauge-Based Analysis of ...基于1993—2024年松辽流域225个国家常规气象站的逐日降水数据和来自NOAA(National Oceanic and Atmospheric Administration)不同分辨的CMAP(CPC Merged Analysis of Precipitation)和CPC(CPC Global Unified Gauge-Based Analysis of Daily Precipitation)资料,探讨了NOAA两套降水资料对松辽流域夏季降水的适用性。结果表明:(1)CMAP和CPC均能够较合理地反映松辽流域6—8月降水量的空间分布特征,但CPC更能刻画出松辽流域降水细节上的分布特征;(2)泰勒图上CPC相比于CMAP与观测数据的相关系数更大,其标准差与观测数据的标准差更接近;(3)评估指标在不同省份的统计以及逐月空间分布均表明,总体上,CPC格点资料相比于CMAP在松辽流域夏季降水模式误差订正业务应用中的适用性更好。展开更多
The 20th Central Committee of the Communist Party of China(CPC)convened its fourth plenary session in Beijing from October 20 to 23.Participants at the session deliberated over and adopted the Recommendations of the C...The 20th Central Committee of the Communist Party of China(CPC)convened its fourth plenary session in Beijing from October 20 to 23.Participants at the session deliberated over and adopted the Recommendations of the CPC Central Committee for Formulating the 15th Five-Year Plan for Economic and Social Development,according to a communique of the session released on October 23.The Political Bureau of the CPC Central Committee presided over the meeting.展开更多
Arthrospira platensis is an economically important cyanobacterium; and it has been used widely in food and pharmaceutical industries. The phycocyanin(PC) from A. platensis is extremely valuable in medicine and molecul...Arthrospira platensis is an economically important cyanobacterium; and it has been used widely in food and pharmaceutical industries. The phycocyanin(PC) from A. platensis is extremely valuable in medicine and molecular biology due to its antioxidation and anti-tumoring activity and applicability as fluorescence protein tag. In present study, two recombinant plasmids, one contained the phycocyanobilin(PCB)-producing genes(hox1 and pcyA) while the other contained the phycobiliprotein gene(cpcB) and the lyase gene(either cpcS/U or cpcT), were constructed and synchronically transferred into E. coli in order to test the the activities of relevant lyases for catalysing PCB addition to CpcB during synthesizing fluorescent PC holo-β-subunit(β-PC) of A. platensis. As was evidenced by the fluorescence emitted at a peak specific for PC, CpcB was successfully synthesized in E. coli, to which co-expressed PCBs attached though at a relatively low efficiency. The results showed that the attachment of PCBs to CpcB were carried out mainly by co-expressed CpcS/U but CpcB also showed some autocatalytic activity. Currently, no CpcT activity was detected in this E. coli expression system. Further studies will be conducted to improve the efficiency of fluorescent PC synthesis in E. coli.展开更多
文摘基于1993—2024年松辽流域225个国家常规气象站的逐日降水数据和来自NOAA(National Oceanic and Atmospheric Administration)不同分辨的CMAP(CPC Merged Analysis of Precipitation)和CPC(CPC Global Unified Gauge-Based Analysis of Daily Precipitation)资料,探讨了NOAA两套降水资料对松辽流域夏季降水的适用性。结果表明:(1)CMAP和CPC均能够较合理地反映松辽流域6—8月降水量的空间分布特征,但CPC更能刻画出松辽流域降水细节上的分布特征;(2)泰勒图上CPC相比于CMAP与观测数据的相关系数更大,其标准差与观测数据的标准差更接近;(3)评估指标在不同省份的统计以及逐月空间分布均表明,总体上,CPC格点资料相比于CMAP在松辽流域夏季降水模式误差订正业务应用中的适用性更好。
文摘The 20th Central Committee of the Communist Party of China(CPC)convened its fourth plenary session in Beijing from October 20 to 23.Participants at the session deliberated over and adopted the Recommendations of the CPC Central Committee for Formulating the 15th Five-Year Plan for Economic and Social Development,according to a communique of the session released on October 23.The Political Bureau of the CPC Central Committee presided over the meeting.
基金supported by the National Science and Technology Major Project of China (2008ZX08001-004)
文摘Arthrospira platensis is an economically important cyanobacterium; and it has been used widely in food and pharmaceutical industries. The phycocyanin(PC) from A. platensis is extremely valuable in medicine and molecular biology due to its antioxidation and anti-tumoring activity and applicability as fluorescence protein tag. In present study, two recombinant plasmids, one contained the phycocyanobilin(PCB)-producing genes(hox1 and pcyA) while the other contained the phycobiliprotein gene(cpcB) and the lyase gene(either cpcS/U or cpcT), were constructed and synchronically transferred into E. coli in order to test the the activities of relevant lyases for catalysing PCB addition to CpcB during synthesizing fluorescent PC holo-β-subunit(β-PC) of A. platensis. As was evidenced by the fluorescence emitted at a peak specific for PC, CpcB was successfully synthesized in E. coli, to which co-expressed PCBs attached though at a relatively low efficiency. The results showed that the attachment of PCBs to CpcB were carried out mainly by co-expressed CpcS/U but CpcB also showed some autocatalytic activity. Currently, no CpcT activity was detected in this E. coli expression system. Further studies will be conducted to improve the efficiency of fluorescent PC synthesis in E. coli.
