The paper presents the results of biometrical study of the seeds and cones of larch taxa from Northeast of China. Fourteen characters are considered and their analyses showed that the seeds and cones of the larch taxa...The paper presents the results of biometrical study of the seeds and cones of larch taxa from Northeast of China. Fourteen characters are considered and their analyses showed that the seeds and cones of the larch taxa were relative greatly variable. Cluster analysis and principal component analysis for all 6 larch taxa were made. The analysis results proved that the dominant larch population in Toudao Farm fell within the range of variation ofLarix olgensis. The key taxonomic characters are the length of seed wing, length of cone, length of seed, the length/width ratio of seed and number of scales.展开更多
Stepwise selection approach was adopted to obtain glyphosate-tolerant upland cotton mutant(R1098) from the embryogenic calli of Coker 312(Gossypium hirsutum L.).The calli were transferred to selection medium and multi...Stepwise selection approach was adopted to obtain glyphosate-tolerant upland cotton mutant(R1098) from the embryogenic calli of Coker 312(Gossypium hirsutum L.).The calli were transferred to selection medium and multi-step selection pressure process was carried out until the展开更多
CaN nanorods are successfully fabricated by adjusting the flow rate ratio of hydrogen （H2）/nitrogen （N2） and growth temperature of the selective area growth （SAG） method with metal organic chemical vapor deposit...CaN nanorods are successfully fabricated by adjusting the flow rate ratio of hydrogen （H2）/nitrogen （N2） and growth temperature of the selective area growth （SAG） method with metal organic chemical vapor deposition （MOCVD）. The SAG template is obtained by nanospherical-lens photolithography. It is found that increasing the flow rate of 1-12 will change the CaN crystal shape from pyramid to vertical rod, while increasing the growth temperature will reduce the diameters of GaN rods to nanometer scale. Finally the CaN nanorods with smooth lateral surface and relatively good quality are obtained under the condition that the H2：N2 ratio is 1：1 and the growth temperature is 1030℃. The good crystal quality and orientation of GaN nanorods are confirmed by high resolution transmission electron microscopy. The cathodoluminescence spectrum suggests that the crystal and optical quality is also improved with increasing the temperature.展开更多
In a study published recently in Nature,Sass,Ma,and colleagues describe the neurokinin 2 receptor(NK2R),a G protein-coupled receptor(GPCR),as a novel regulator of food intake as well as energy expenditure,and develop ...In a study published recently in Nature,Sass,Ma,and colleagues describe the neurokinin 2 receptor(NK2R),a G protein-coupled receptor(GPCR),as a novel regulator of food intake as well as energy expenditure,and develop and characterize selective agonists that effectively activate NK2R to promote weight loss.Most interestingly,the authors bridge the gap between rodents and primates,raising hopes for novel treatment options.1 Although obesity cases are continuously rising,thereby contributing to major health problems,long-term effective treatment options are still limited.However,it is well established that GPCRs and their pathways are involved in the regulation of different processes controlling appetite,food intake,or energy homeostasis.Thus,several receptors expressed in neurons governing food intake have been proposed to be promising targets for body weight reduction.However,currently the only GPCR agonists approved for obesity treatment are targeting incretin receptors(receptors for glucagon-like peptide-1(GLP1R),glucose-dependent insulinotropic peptide(GIP),glucagon(GCGR))(Fig.1).展开更多
文摘The paper presents the results of biometrical study of the seeds and cones of larch taxa from Northeast of China. Fourteen characters are considered and their analyses showed that the seeds and cones of the larch taxa were relative greatly variable. Cluster analysis and principal component analysis for all 6 larch taxa were made. The analysis results proved that the dominant larch population in Toudao Farm fell within the range of variation ofLarix olgensis. The key taxonomic characters are the length of seed wing, length of cone, length of seed, the length/width ratio of seed and number of scales.
文摘Stepwise selection approach was adopted to obtain glyphosate-tolerant upland cotton mutant(R1098) from the embryogenic calli of Coker 312(Gossypium hirsutum L.).The calli were transferred to selection medium and multi-step selection pressure process was carried out until the
基金Supported by the Key Program of the National Natural Science Foundation of China under Grant No 61334009the National High Technology Research and Development Program of China under Grant No 2014AA032604
文摘CaN nanorods are successfully fabricated by adjusting the flow rate ratio of hydrogen （H2）/nitrogen （N2） and growth temperature of the selective area growth （SAG） method with metal organic chemical vapor deposition （MOCVD）. The SAG template is obtained by nanospherical-lens photolithography. It is found that increasing the flow rate of 1-12 will change the CaN crystal shape from pyramid to vertical rod, while increasing the growth temperature will reduce the diameters of GaN rods to nanometer scale. Finally the CaN nanorods with smooth lateral surface and relatively good quality are obtained under the condition that the H2：N2 ratio is 1：1 and the growth temperature is 1030℃. The good crystal quality and orientation of GaN nanorods are confirmed by high resolution transmission electron microscopy. The cathodoluminescence spectrum suggests that the crystal and optical quality is also improved with increasing the temperature.
基金supported by the German Diabetes Association(DDG)(D.T.)the German Research Foundation(DFG)in CRC1423/2(project number 421152132,C04(S.P.)).
文摘In a study published recently in Nature,Sass,Ma,and colleagues describe the neurokinin 2 receptor(NK2R),a G protein-coupled receptor(GPCR),as a novel regulator of food intake as well as energy expenditure,and develop and characterize selective agonists that effectively activate NK2R to promote weight loss.Most interestingly,the authors bridge the gap between rodents and primates,raising hopes for novel treatment options.1 Although obesity cases are continuously rising,thereby contributing to major health problems,long-term effective treatment options are still limited.However,it is well established that GPCRs and their pathways are involved in the regulation of different processes controlling appetite,food intake,or energy homeostasis.Thus,several receptors expressed in neurons governing food intake have been proposed to be promising targets for body weight reduction.However,currently the only GPCR agonists approved for obesity treatment are targeting incretin receptors(receptors for glucagon-like peptide-1(GLP1R),glucose-dependent insulinotropic peptide(GIP),glucagon(GCGR))(Fig.1).
