Neglecting the self-force, self-energy and radiative effects, we follow the spirit of Wald＇s gedanken experiment and further discuss whether an extremal Kerr-Newman-AdS （KNA） black hole can turn into a naked singul...Neglecting the self-force, self-energy and radiative effects, we follow the spirit of Wald＇s gedanken experiment and further discuss whether an extremal Kerr-Newman-AdS （KNA） black hole can turn into a naked singularity when it captures charged and spinning massive particles. It is found that feeding a test particle into an extremal KNA black hole could lead to a violation of cosmic censorship for the black hole.展开更多
Eastern Black Sea Region in northeastern part of Turkey has the highest precipitation total in the country, approaching 2500 mm per a year. It is therefore an important region as it frequently encounters with flash fl...Eastern Black Sea Region in northeastern part of Turkey has the highest precipitation total in the country, approaching 2500 mm per a year. It is therefore an important region as it frequently encounters with flash floods due to heavy rains. For future planning of water resources, environment and urbanization, it is important to know the expected behavior of hydrometeorological processes, mainly precipitation and flow. Due to these facts, in this study, homogeneity of long-term annual precipitation and streamflow series of the Eastern Black Sea Region, Turkey is checked using double mass curve method and trends are determined by means of the Mann-Kendall test. The data network consists of 38 precipitation gauging stations and 40 flow gauging stations across the Eastern Black Sea Region. It is found that 27 precipitation stations out of 38 are homogeneous and no trend is available. Out of the remaining stations, nine are found non-homogeneous and four with trend. For annual flow data, it is found that 22 stations out of 40 are homogeneous and no trend is available. The remaining 18 stations are found non-homogeneous, among which 5 stations have trend at the same time.展开更多
[Objective]The paper was to analyze whether Asiatic black bear( Ursus thibetanus) had different blood group systems. [Method]Whole blood samples were collected from 40 Asiatic black bears in Fujian Province,China. Tub...[Objective]The paper was to analyze whether Asiatic black bear( Ursus thibetanus) had different blood group systems. [Method]Whole blood samples were collected from 40 Asiatic black bears in Fujian Province,China. Tube method was used to detect antibodies in plasma,and antibody isotype was determined with 2-mercaptoethanol. Plasma was further analyzed by mass spectrometry. [Result] The plasma from four black bears had antibodies,possibly Ig M isoform,which could agglutinate RBCs from 30 bears. Blood samples from 10 bears were tested by human blood typing reagents. The results showed that four black bears had blood type like human type O,while six bears had like human type B. Mass spectrometry results demonstrated that plasma protein had extensive homology to serum albumin-like isoform 1 found in giant panda( Ailuropoda melanoleuca). [Conclusion]Asiatic black bear might have at least one blood group system with two blood types. If the sick bear needs blood transfusion,a cross-matching test is necessary. Moreover,giant panda might receive blood from Asiatic black bear in case of emergency.展开更多
基金Supported by the National Natural Science Foundation of China under Grant Nos 11275099,11435006 and 11405130
文摘Neglecting the self-force, self-energy and radiative effects, we follow the spirit of Wald＇s gedanken experiment and further discuss whether an extremal Kerr-Newman-AdS （KNA） black hole can turn into a naked singularity when it captures charged and spinning massive particles. It is found that feeding a test particle into an extremal KNA black hole could lead to a violation of cosmic censorship for the black hole.
文摘Eastern Black Sea Region in northeastern part of Turkey has the highest precipitation total in the country, approaching 2500 mm per a year. It is therefore an important region as it frequently encounters with flash floods due to heavy rains. For future planning of water resources, environment and urbanization, it is important to know the expected behavior of hydrometeorological processes, mainly precipitation and flow. Due to these facts, in this study, homogeneity of long-term annual precipitation and streamflow series of the Eastern Black Sea Region, Turkey is checked using double mass curve method and trends are determined by means of the Mann-Kendall test. The data network consists of 38 precipitation gauging stations and 40 flow gauging stations across the Eastern Black Sea Region. It is found that 27 precipitation stations out of 38 are homogeneous and no trend is available. Out of the remaining stations, nine are found non-homogeneous and four with trend. For annual flow data, it is found that 22 stations out of 40 are homogeneous and no trend is available. The remaining 18 stations are found non-homogeneous, among which 5 stations have trend at the same time.
基金Supported by Hong Kong Ocean Park Conservation Foundation(GP01-1617)Special Fund of Health Industry Research(201002005)
文摘[Objective]The paper was to analyze whether Asiatic black bear( Ursus thibetanus) had different blood group systems. [Method]Whole blood samples were collected from 40 Asiatic black bears in Fujian Province,China. Tube method was used to detect antibodies in plasma,and antibody isotype was determined with 2-mercaptoethanol. Plasma was further analyzed by mass spectrometry. [Result] The plasma from four black bears had antibodies,possibly Ig M isoform,which could agglutinate RBCs from 30 bears. Blood samples from 10 bears were tested by human blood typing reagents. The results showed that four black bears had blood type like human type O,while six bears had like human type B. Mass spectrometry results demonstrated that plasma protein had extensive homology to serum albumin-like isoform 1 found in giant panda( Ailuropoda melanoleuca). [Conclusion]Asiatic black bear might have at least one blood group system with two blood types. If the sick bear needs blood transfusion,a cross-matching test is necessary. Moreover,giant panda might receive blood from Asiatic black bear in case of emergency.
