Glycosmis longipetala F. J. Mou ＆ D. X. Zhang is described from Guangxi and Yunnan provinces in southwestern China. The new species is similar to G. cochinchinensis （Lour.） Pierre ex Engl. by its simple leaves, but...Glycosmis longipetala F. J. Mou ＆ D. X. Zhang is described from Guangxi and Yunnan provinces in southwestern China. The new species is similar to G. cochinchinensis （Lour.） Pierre ex Engl. by its simple leaves, but distinguishable in having long-elliptic or oblanceolate （vs. ovate） leaves, long-ovoid to ellipsoid （vs. ovoid） floral buds, ovaries with many tubercles （vs. smooth） and glabrous （vs. pubescent） stamens. The pollen grains of the new species are 23.9±3.09 （20.8-27.0）×22.0±1.80 （20.4-24.4）μm in size with reticulate exine ornamentation in equatorial area and foveolate in polar area. The chromosome number of the new species is 2n=72.展开更多
Mesozoic volcanic rocks in the eastern part of the North Dabi e Mountains are rich in Na (Na\-2O=\{4.03%\}, Na\-2O/K\-2O=\{1.31\}), Sr and Ba , and high in Sr/Y ratio but low in Nb, Y and H REE. They have experienced ...Mesozoic volcanic rocks in the eastern part of the North Dabi e Mountains are rich in Na (Na\-2O=\{4.03%\}, Na\-2O/K\-2O=\{1.31\}), Sr and Ba , and high in Sr/Y ratio but low in Nb, Y and H REE. They have experienced strong fractionation of REE \, and are similar to adakite in geochemical characteristics. The U-Pb dating of zircon from the volcanic rocks is Ma, belonging to Early Cretaceous. These rocks are similar to the volcanic rocks of North Huaiyang not only in age and rare-earth element and trace element geochemistry, but also in the formati on temperature and pressure of the minerals. The results indicated that the dela mination of mountain root and underplating of mafic-ultramafic magma had happen ed in the Dabie orogen before Early Cretaceous. Mesozoic magmatism was intense i n the North Dabie Mountains, including the intrusion of mafic-ultramafic magma, uplifting of gneiss dome, explosion of volcanic rocks and intrusion of granitic magma. The Mesozoic volcanic rocks in the eastern part of the North Dabie Mount ains may be one part of the Mesozoic volcano-intrusive complex belt of North Hu aiyang. The existence of Mesozoic volcanic remnant cap means the denudation of t he Dabie orogenic belt was not very strong since Early Cretaceous.展开更多
Cell proliferation is accompanied with changing levels of intracellular calmodulin (CaM) and its activation. Prior data from synchronized cell population could not actually stand for various CaM levels in different ph...Cell proliferation is accompanied with changing levels of intracellular calmodulin (CaM) and its activation. Prior data from synchronized cell population could not actually stand for various CaM levels in different phases of cell cycle. Here, based upon quantitative measurement of fluorescence in individual cells, a method was developed to investigate intracellular total CaM and Ca2+-activated CaM contents. Intensity of CaM immunoflurescence gave total CaM level, and Ca2+ -activated CaM was measured by fluorescence intensity of CaM antagonist trifluoperazine (TFP). In mouse erythroleuke-mia (MEL) cells, total CaM level increased from G1 through S to G2 M, reaching a maximum of 2-fold increase, then reduced to half amount after cell division. Meanwhile, Ca2+-activated CaM also in creased through the cell cycle (G1 , S, G2M). Increasing observed in G1 meant that the entry of cells from G1 into S phase may require CaM accumulation, and, equally or even more important, Ca2+-dependent activation of CaM. Ca2+- activated CaM decreased after cell divi-sion. The results suggested that CaM gene expression and Ca2+-modulated CaM activation act synergistically to accomplish the cell cycle progression.展开更多
基金supported by National Natural Science Foundation of China (30370107).
文摘Glycosmis longipetala F. J. Mou ＆ D. X. Zhang is described from Guangxi and Yunnan provinces in southwestern China. The new species is similar to G. cochinchinensis （Lour.） Pierre ex Engl. by its simple leaves, but distinguishable in having long-elliptic or oblanceolate （vs. ovate） leaves, long-ovoid to ellipsoid （vs. ovoid） floral buds, ovaries with many tubercles （vs. smooth） and glabrous （vs. pubescent） stamens. The pollen grains of the new species are 23.9±3.09 （20.8-27.0）×22.0±1.80 （20.4-24.4）μm in size with reticulate exine ornamentation in equatorial area and foveolate in polar area. The chromosome number of the new species is 2n=72.
基金theChineseAcademyofGeologicalSciences (No .I50C0 0 2 0 04)ChineseContinentalSienceDrill (No .2 0 0 0 4 0 90 )
文摘Mesozoic volcanic rocks in the eastern part of the North Dabi e Mountains are rich in Na (Na\-2O=\{4.03%\}, Na\-2O/K\-2O=\{1.31\}), Sr and Ba , and high in Sr/Y ratio but low in Nb, Y and H REE. They have experienced strong fractionation of REE \, and are similar to adakite in geochemical characteristics. The U-Pb dating of zircon from the volcanic rocks is Ma, belonging to Early Cretaceous. These rocks are similar to the volcanic rocks of North Huaiyang not only in age and rare-earth element and trace element geochemistry, but also in the formati on temperature and pressure of the minerals. The results indicated that the dela mination of mountain root and underplating of mafic-ultramafic magma had happen ed in the Dabie orogen before Early Cretaceous. Mesozoic magmatism was intense i n the North Dabie Mountains, including the intrusion of mafic-ultramafic magma, uplifting of gneiss dome, explosion of volcanic rocks and intrusion of granitic magma. The Mesozoic volcanic rocks in the eastern part of the North Dabie Mount ains may be one part of the Mesozoic volcano-intrusive complex belt of North Hu aiyang. The existence of Mesozoic volcanic remnant cap means the denudation of t he Dabie orogenic belt was not very strong since Early Cretaceous.
文摘Cell proliferation is accompanied with changing levels of intracellular calmodulin (CaM) and its activation. Prior data from synchronized cell population could not actually stand for various CaM levels in different phases of cell cycle. Here, based upon quantitative measurement of fluorescence in individual cells, a method was developed to investigate intracellular total CaM and Ca2+-activated CaM contents. Intensity of CaM immunoflurescence gave total CaM level, and Ca2+ -activated CaM was measured by fluorescence intensity of CaM antagonist trifluoperazine (TFP). In mouse erythroleuke-mia (MEL) cells, total CaM level increased from G1 through S to G2 M, reaching a maximum of 2-fold increase, then reduced to half amount after cell division. Meanwhile, Ca2+-activated CaM also in creased through the cell cycle (G1 , S, G2M). Increasing observed in G1 meant that the entry of cells from G1 into S phase may require CaM accumulation, and, equally or even more important, Ca2+-dependent activation of CaM. Ca2+- activated CaM decreased after cell divi-sion. The results suggested that CaM gene expression and Ca2+-modulated CaM activation act synergistically to accomplish the cell cycle progression.
