Habitat pattern change of red-crowned cranes (Grus japonensis) in t he Liaohe Delta between 1988 and 1998 was analyzed with the help of Spatial Dive rsity Index based on remote sensing data and field investigation. Th...Habitat pattern change of red-crowned cranes (Grus japonensis) in t he Liaohe Delta between 1988 and 1998 was analyzed with the help of Spatial Dive rsity Index based on remote sensing data and field investigation. The result sho wed that the influence from human activities on the wetland habitat of red-crow ned cranes was prominent with the development of oil and agricultural exploitati on, and the habitat pattern of red-crowned cranes had been obviously changed by the human disturbance during the ten years. The areas with high Spatial Diversi ty values (SD≥0.65) and that with mid-high values (0.5≤SD< 0.65), which const ituted the main part of suitable habitat of red-crowned cranes,had reduced to 9142ha and 5576ha respectively, with the shrinking of natural land cover, such a s reed and Suaeda community. The habitat pattern became more fragmented, which w as caused by roads and wells during oil exploration. It was indicated that the s uitability and quality of habitat for red-crowned cranes in the Liaohe Delta we re degraded in the last decade. The results also showed that diversity index cou ld reflect the habitat suitability of red-crowned cranes quantitatively and des cribe the spatial pattern of the habitat explicitly. This study will provide a s cientific basis for habitat protection of red-crowned cranes and other rare spe cies in wetlands.展开更多
Objective: To study the effects of allogeneic blood transfusion on polarized Th cell in gastric carcinoma patients during perioperative time. Methods: Thirty patients undergoing gastric carcinectomy were randomly divi...Objective: To study the effects of allogeneic blood transfusion on polarized Th cell in gastric carcinoma patients during perioperative time. Methods: Thirty patients undergoing gastric carcinectomy were randomly divided into three groups with 10 patients in each group: group A received no allogeneic blood; group B received leukodepleted blood; group C received allogeneic whole blood during perioperative time. The polarized rates of Th cell were measured by flow cytometry. Results: The counts of Thl in group A decreased significantly on the 2nd postoperation, but returned to the baseline levels on the 5th postoperative day. The Thl counts and Th1/Th2 ratio decreased significantly in group B and group C after blood transfusion (P<0.05). The Th2 counts increased significantly in group B and C postoperative time. On the 10th postoperative day the Th1 ,Th2 cell counts and Th1/Th2 ratio returned to preoperative level in group B, but remained low in group C. As compared with that in group A, the Th1 cell counts, Th1/Th2 ratio reduced and Th2 cell counts increased markedly in group C than in group B(P<0.05). Conclusion: Perioperative blood transfusion contributes to the immunosuppression, which is more serious after whole blood transfusion than leukodepleted blood. In perioperative period component blood transfusion is superior to whole blood transfusion. The Th cells polarized to Th2 cells may be one of the causes of immunosuppression in patients received allogeneic blood transfusion.展开更多
The elite rice cultivar Yuejingsimiao 2 (YJ2) is characterized by a high level of grain quality and yield, and resistance against Magnaporthe oryzae. YJ2 showed 100% resistance to four fungal populations collected fro...The elite rice cultivar Yuejingsimiao 2 (YJ2) is characterized by a high level of grain quality and yield, and resistance against Magnaporthe oryzae. YJ2 showed 100% resistance to four fungal populations collected from Guangdong, Sichuan, Liaoning, and Heilongjiang Provinces, which is a higher frequency than that shown by the well-known resistance (R) gene donor cultivars such as Sanhuangzhan 2 and 28zhan. Segregation analysis for resistance with F 2 and F 4 populations indicated the resistance of YJ2 was controlled by multiple genes that are dominant or recessive. The putative R genes of YJ2 were roughly tagged by SSR markers, located on chromosomes 2, 6, 8, and 12, in a bulked-segregant analysis using genome-wide selected SSR markers with F 4 lines that segregated into 3 resistant (R):1 susceptible (S) or 1R:3S. The recessive R gene on chromosome 8 was further mapped to an interval 1.9 cM/152 kb in length by linkage analysis with genomic position-ready markers in the mapping population derived from an F 4 line that segregated into 1R:3S. Given that no major R gene was mapped to this interval, the novel R gene was designated as pi55(t). Out of 26 candidate genes predicted in the region based on the reference genomic sequence of the cultivar Nipponbare, two genes that encode a leucine-rich repeat-containing protein and heavy-metalassociated domain-containing protein, respectively, were suggested as the most likely candidates for pi55(t).展开更多
文摘Habitat pattern change of red-crowned cranes (Grus japonensis) in t he Liaohe Delta between 1988 and 1998 was analyzed with the help of Spatial Dive rsity Index based on remote sensing data and field investigation. The result sho wed that the influence from human activities on the wetland habitat of red-crow ned cranes was prominent with the development of oil and agricultural exploitati on, and the habitat pattern of red-crowned cranes had been obviously changed by the human disturbance during the ten years. The areas with high Spatial Diversi ty values (SD≥0.65) and that with mid-high values (0.5≤SD< 0.65), which const ituted the main part of suitable habitat of red-crowned cranes,had reduced to 9142ha and 5576ha respectively, with the shrinking of natural land cover, such a s reed and Suaeda community. The habitat pattern became more fragmented, which w as caused by roads and wells during oil exploration. It was indicated that the s uitability and quality of habitat for red-crowned cranes in the Liaohe Delta we re degraded in the last decade. The results also showed that diversity index cou ld reflect the habitat suitability of red-crowned cranes quantitatively and des cribe the spatial pattern of the habitat explicitly. This study will provide a s cientific basis for habitat protection of red-crowned cranes and other rare spe cies in wetlands.
文摘Objective: To study the effects of allogeneic blood transfusion on polarized Th cell in gastric carcinoma patients during perioperative time. Methods: Thirty patients undergoing gastric carcinectomy were randomly divided into three groups with 10 patients in each group: group A received no allogeneic blood; group B received leukodepleted blood; group C received allogeneic whole blood during perioperative time. The polarized rates of Th cell were measured by flow cytometry. Results: The counts of Thl in group A decreased significantly on the 2nd postoperation, but returned to the baseline levels on the 5th postoperative day. The Thl counts and Th1/Th2 ratio decreased significantly in group B and group C after blood transfusion (P<0.05). The Th2 counts increased significantly in group B and C postoperative time. On the 10th postoperative day the Th1 ,Th2 cell counts and Th1/Th2 ratio returned to preoperative level in group B, but remained low in group C. As compared with that in group A, the Th1 cell counts, Th1/Th2 ratio reduced and Th2 cell counts increased markedly in group C than in group B(P<0.05). Conclusion: Perioperative blood transfusion contributes to the immunosuppression, which is more serious after whole blood transfusion than leukodepleted blood. In perioperative period component blood transfusion is superior to whole blood transfusion. The Th cells polarized to Th2 cells may be one of the causes of immunosuppression in patients received allogeneic blood transfusion.
基金supported by the National Natural Science Foundation of China (Grant No. U1131003)the National Transgenic Research Projects(Grant Nos. 2009ZX08009-023 and 2011ZX08001-002)+1 种基金the Guangdong Provincial Natural Science Foundation (Grant No. 10151064001000008)the President Science Foundation of Guangdong Academy of Agricultural Sciences (Grant No. 201101)
文摘The elite rice cultivar Yuejingsimiao 2 (YJ2) is characterized by a high level of grain quality and yield, and resistance against Magnaporthe oryzae. YJ2 showed 100% resistance to four fungal populations collected from Guangdong, Sichuan, Liaoning, and Heilongjiang Provinces, which is a higher frequency than that shown by the well-known resistance (R) gene donor cultivars such as Sanhuangzhan 2 and 28zhan. Segregation analysis for resistance with F 2 and F 4 populations indicated the resistance of YJ2 was controlled by multiple genes that are dominant or recessive. The putative R genes of YJ2 were roughly tagged by SSR markers, located on chromosomes 2, 6, 8, and 12, in a bulked-segregant analysis using genome-wide selected SSR markers with F 4 lines that segregated into 3 resistant (R):1 susceptible (S) or 1R:3S. The recessive R gene on chromosome 8 was further mapped to an interval 1.9 cM/152 kb in length by linkage analysis with genomic position-ready markers in the mapping population derived from an F 4 line that segregated into 1R:3S. Given that no major R gene was mapped to this interval, the novel R gene was designated as pi55(t). Out of 26 candidate genes predicted in the region based on the reference genomic sequence of the cultivar Nipponbare, two genes that encode a leucine-rich repeat-containing protein and heavy-metalassociated domain-containing protein, respectively, were suggested as the most likely candidates for pi55(t).
