Collagen of squid （Ommastrephes bartrami） skin was examined in the present study. Histology showed that collagen fiber in the skin was partially cross-linked with muscle fiber. Acid-solubilized collagen （ASC） and ...Collagen of squid （Ommastrephes bartrami） skin was examined in the present study. Histology showed that collagen fiber in the skin was partially cross-linked with muscle fiber. Acid-solubilized collagen （ASC） and pepsin-solubilized collagen （PSC） were extracted from the skin and characterized. The results of amino acid composition and electrophoretic patterns revealed that ASC and PSC were both type 1 collagen, containing α1 and α2 chains. FTIR （fourier transform infrared spectroscopy） investigations confirmed the existence of helical arrangements in PSC of squid skin. The denaturation temperature （Td） and shrinkage temperature （T5） of PSC were 29.4℃ and 52.8℃, respectively.展开更多
In February 2006,a large amount of unknown floating microorganisms appeared in the Hailang River(HR) in the City of Hailin,Heilongjiang Province,China.The microorganisms caused the river water fouling and threatened t...In February 2006,a large amount of unknown floating microorganisms appeared in the Hailang River(HR) in the City of Hailin,Heilongjiang Province,China.The microorganisms caused the river water fouling and threatened the clean water supply of the city.To identify the unknown floating organisms,morphological and histological inspection,PCR,cloning and sequence analysis were conducted.The results revealed that the unknown floating organisms in the river were a novel species that likely belonged to oomycetes in Saprolegniales.The organisms were named Saprolegnia sp.HL0602.展开更多
In general, every system is in one of the three states： normal, abnormal, or failure state. When the system is diagnosed as abnormal state, it needs predictive maintenance, lfthe system fails, an identical new one wi...In general, every system is in one of the three states： normal, abnormal, or failure state. When the system is diagnosed as abnormal state, it needs predictive maintenance, lfthe system fails, an identical new one will replace it. The predictive maintenance cannot make the system ＂as good as new＂. Under these assumptions, the reliability index and the inspection-replacement policy of a system were studied. The explicit expression of the reliability index and the average income rate （i.e., the long-run average income per unit time） are derived by using probability analysis and vector Markov process method. The criterion of feasibility for the optimal inspection-replacement policy under the maximum average income rate is obtained. The numerical example shows the optimal inspection-replacement policy can raise the average income rate when the optimal inspection-replacement policy is feasible.展开更多
基金supported by the High Technology Research and Development Programme of China (No. 2006AA09Z438)the National Natural Science Foundation of China (No.30871943).
文摘Collagen of squid （Ommastrephes bartrami） skin was examined in the present study. Histology showed that collagen fiber in the skin was partially cross-linked with muscle fiber. Acid-solubilized collagen （ASC） and pepsin-solubilized collagen （PSC） were extracted from the skin and characterized. The results of amino acid composition and electrophoretic patterns revealed that ASC and PSC were both type 1 collagen, containing α1 and α2 chains. FTIR （fourier transform infrared spectroscopy） investigations confirmed the existence of helical arrangements in PSC of squid skin. The denaturation temperature （Td） and shrinkage temperature （T5） of PSC were 29.4℃ and 52.8℃, respectively.
基金Supported by Infectious Diseases Special Project,Minister of Health of China(2008ZX10004-001)
文摘In February 2006,a large amount of unknown floating microorganisms appeared in the Hailang River(HR) in the City of Hailin,Heilongjiang Province,China.The microorganisms caused the river water fouling and threatened the clean water supply of the city.To identify the unknown floating organisms,morphological and histological inspection,PCR,cloning and sequence analysis were conducted.The results revealed that the unknown floating organisms in the river were a novel species that likely belonged to oomycetes in Saprolegniales.The organisms were named Saprolegnia sp.HL0602.
基金Project supported by the National Hi-Tech Research and Develop-ment Program (863) of China (No. 2005AA505101-506)theNational Natural Science Foundation of China (No. 50477030)
文摘In general, every system is in one of the three states： normal, abnormal, or failure state. When the system is diagnosed as abnormal state, it needs predictive maintenance, lfthe system fails, an identical new one will replace it. The predictive maintenance cannot make the system ＂as good as new＂. Under these assumptions, the reliability index and the inspection-replacement policy of a system were studied. The explicit expression of the reliability index and the average income rate （i.e., the long-run average income per unit time） are derived by using probability analysis and vector Markov process method. The criterion of feasibility for the optimal inspection-replacement policy under the maximum average income rate is obtained. The numerical example shows the optimal inspection-replacement policy can raise the average income rate when the optimal inspection-replacement policy is feasible.
