[Correlation between ecological factors and effective component content, flower, and leaf traits of Epimedium pubescens].

No systematic research has been reported on the correlation between different ecological factors and the effective component content, flower, and leaf traits of Epimedium pubescens. In this study, 21 kinds of E. pubescens in different regions were investigated, and the content of two effective components of icariin(I) and Epimedin C(C), as well as six leaf traits and 12 flower traits were determined. The correlation between 11 ecological factors and the above traits in different regions for five consecutive years was explored. The results showed that no significant correlation was observed between the ecological factors and the total content of two effective components(I+C) of E. pubescens. Latitude and temperature(including annual average temperature, annual average minimum temperature, and soil temperature of each soil layer) were significantly positively and negatively correlated with the ratio of the content of the two effective components(C/I)(P<0.01), respectively. There was a significant correlation between ecological factors and flower traits, and the annual average soil temperature of each soil layer, annual average temperature, and annual average minimum temperature were significantly correlated with most flower traits in multiple years(P<0.01). However, a weak correlation between ecological factors and leaf traits was detected. A significant positive correlation of the annual average soil temperature of each soil layer and annual average humidity(P<0.01) with the width of nutrient leaf in only a few years was detected. Therefore, it was concluded that the total content of effective components of E. pubescens was determined by genetics, with a slight influence of ecological factors. The annual average temperature, annual average minimum temperature, and soil temperature of each soil layer were the ecological factors that had the most significant impact on flower traits, which showed significant differences in different regions, and similar results were not found in leaf traits. Overall, this study systematically conducted a correlation analysis between ecological factors and the effective components, as well as flower and leaf traits, providing guidance for the quality improvement, introduction, and domestication of E. pubescens.

[The prevalence of orthodontic treatment need in Urumqi Han's adolescent].

OBJECTIVE: To assess the severity of malocclusion and the need for orthodontic treatment in Urumqi Hans' adolescent. METHODS: 562 children aged from 11-19 years old were chosen randomly and were investigated. The severity of malocclusion and the need for orthodontic treatment were assessed using the Malocclusion Severity Index (MSI, Hill PA 1992). RESULTS: The MSI scores for this population were 21.91 +/- 17.09 in male and 22.28 +/- 17.26 in female, respectively, there were no significant differences between sexes (P > 0.05). According to the classifications of MSI scores, the rates of the need for orthodontic treatment were 54.55% in male and 55.40% in female. CONCLUSIONS: (1) The rates of orthodontic treatment need in Urumqi Hans' adolescent were highly frequent. (2) The MSI is a simple precise valid index for assessing the orthodontic Treatment Need. It is suggested to be used widely.