[Objective] The research aimed to study the tissue culture technology and callus induction by radiation mutation of A. membranaceus Bge. [ Method ] With the different parts of Astragalus membranaceus Bge. var. monghol...[Objective] The research aimed to study the tissue culture technology and callus induction by radiation mutation of A. membranaceus Bge. [ Method ] With the different parts of Astragalus membranaceus Bge. var. mongholicus （ Bge. ） Hsiao aseptic seedling as explants （ leaves, cotyledons, hypocotyls） induced callus, and cotyledon and hypocotyls taken by the method of radiation mutation were studied. [ Result]The results showed that the three explants had relatively high callus induced rate in the medium which respectively made up of MS ＋6-BA 2.0 mg/L ＋ NAA2.0 mg/L, LS ＋6-BA2.0 mg/L ＋NAA0.1 mg/L, MS ＋ 6-BA2.0 rng/L ＋ NAA2.0 rag/L; the optimum mutation time of hypocotyls and cotyledons was 15 minutes; the growth of the callus induced from hypocotyls would be better as the mutation time increased, but when it reached a certain time the growth would be weaken, the induction rate also would be reduced. [ Conclusion] This study will provide the scientific reference in tissue culture and mutation breeding of A. membranaceus Bge.展开更多
The objectives of this study were to assess the prevalence of students＇ fruit and vegetable intake and its associated factors among adolescents in Mongolia. Data for this analysis were from the 2010 Mongolia Global S...The objectives of this study were to assess the prevalence of students＇ fruit and vegetable intake and its associated factors among adolescents in Mongolia. Data for this analysis were from the 2010 Mongolia Global School-Based Health Survey （GSHS）. The GSHS administered a self-report questionnaire to a nationally representative sample （N = 5,328） of 7th-llth grade school children. Chi-square analyses and multivariate logistic regressions were performed to determine the prevalence and to predict the fruit and vegetable intake from associated factors. Only 7.0% of students met WHO＇s recommendation of eating fruits and vegetables S or more times per day. There was a significant association between gender and fruit and vegetable intake （P = .016）. There was a significant relationship between living condition and fruit and vegetable intake （P =.029）. Students who lived in apartment were more likely to have adequate fruit and vegetable intake than those who lived in ger in the khashaa. To be effective, educational interventions should be implemented as early as possible.展开更多
文摘[Objective] The research aimed to study the tissue culture technology and callus induction by radiation mutation of A. membranaceus Bge. [ Method ] With the different parts of Astragalus membranaceus Bge. var. mongholicus （ Bge. ） Hsiao aseptic seedling as explants （ leaves, cotyledons, hypocotyls） induced callus, and cotyledon and hypocotyls taken by the method of radiation mutation were studied. [ Result]The results showed that the three explants had relatively high callus induced rate in the medium which respectively made up of MS ＋6-BA 2.0 mg/L ＋ NAA2.0 mg/L, LS ＋6-BA2.0 mg/L ＋NAA0.1 mg/L, MS ＋ 6-BA2.0 rng/L ＋ NAA2.0 rag/L; the optimum mutation time of hypocotyls and cotyledons was 15 minutes; the growth of the callus induced from hypocotyls would be better as the mutation time increased, but when it reached a certain time the growth would be weaken, the induction rate also would be reduced. [ Conclusion] This study will provide the scientific reference in tissue culture and mutation breeding of A. membranaceus Bge.
文摘The objectives of this study were to assess the prevalence of students＇ fruit and vegetable intake and its associated factors among adolescents in Mongolia. Data for this analysis were from the 2010 Mongolia Global School-Based Health Survey （GSHS）. The GSHS administered a self-report questionnaire to a nationally representative sample （N = 5,328） of 7th-llth grade school children. Chi-square analyses and multivariate logistic regressions were performed to determine the prevalence and to predict the fruit and vegetable intake from associated factors. Only 7.0% of students met WHO＇s recommendation of eating fruits and vegetables S or more times per day. There was a significant association between gender and fruit and vegetable intake （P = .016）. There was a significant relationship between living condition and fruit and vegetable intake （P =.029）. Students who lived in apartment were more likely to have adequate fruit and vegetable intake than those who lived in ger in the khashaa. To be effective, educational interventions should be implemented as early as possible.
