Research on the Current Situation and Improvement Strategies of Science and Technology Ethics Management of Innovation Subjects Based on the Investigation of 11 Provinces (Autonomous Region, Cities) in China / 中国医学伦理学

The healthy development of science and technology (Sci. & Tech) innovation is inseparable from Sci. & Tech ethics. The innovation subject is the driving force of Sci. & Tech innovation. The improvement of Sci. & Tech ethical management ability is conducive to improving the China’s Sci. & Tech ethics governance system. Therefore, this paper deeply analyzed the current status of Sci. & Tech ethics management of the 76 innovation subjects from five aspects, and found that the construction of Sci. & Tech ethics management of Chinese innovation subjects has achieved initial results, but there was still room for further improvement. Based on the problems existing in the Sci. & Tech ethics management of innovation subjects, this paper proposed six strategic suggestions that strengthening the construction and research of artificial intelligence ethics management systems, establishing and improving ethics committees and management systems, actively implementing the registration of Sci. & Tech ethics management information, regularly organizing and participating in various forms of Sci. & Tech ethics training, attaching importance to the reserve and cultivation of composite Sci. & Tech ethics management talents, and cooperating to establish a Sci. & Tech ethics case library, with a view to enhancing the Sci. & Tech ethics management ability of Chinese innovation subjects to adapt to the needs of the healthy development of Sci. & Tech in China.

Epidemiological investigation of birth information and physique status in 9 to 15-year-old children from Chengdu City of Sichuan Province / 中国当代儿科杂志

<p><b>OBJECTIVE</b>As the intrauterine environment can affect childhood growth and development, this study aims to understand the relationship between birth gestational age, birth weight and physique development in 9 to 15-year-old children by a cross sectional investigation in Chengdu City, Sichuan Province.</p><p><b>METHODS</b>A total of 7194 9 to 15-year-old school children were classified according to birth gestational age and birth weight: small for gestational age (SGA), appropriate for gestational age (AGA) and large for gestational age (LGA). Their heights and weights were measured. Parents completed a questionnaire.</p><p><b>RESULTS</b>The prevalence of SGA was 6.23% (448 cases), and 5.13% of children in the SGA group did not undergo "catch-up growth" (lower than -2 SD). The mean height in these children at various stages was significantly lower than in the AGA group (P<0.05). The prevalence of LGA was 18.06% (1299 cases). A total of 179 children (13.78%) were found to be overweight and 57 children (4.39%) were found to be obese in the LGA group. The mean weight in the LGA group at various stages was significantly higher than in the AGA group (P<0.05).</p><p><b>CONCLUSIONS</b>Height and weight development in children born SGA and LGA are different from normal children. More attention should be given to aspects of height and weight development in these school children.</p>

Optimization of induction and purification of HIV-1 Gag protein in Escherichia coli expression system / 生物工程学报

To investigate the effects of induction temperature on the expression product and the impact of urea concentration on the purification, HIV-1 Gag inclusion bodies from E. coli induced at 30 degrees C (IB30) and 37 degrees C (IB37) were dissolved with urea of different concentrations. The solubility and yield of refolding were compared. IB30 were dissolved with 2 mol/L and 8 mol/L urea, and then purified with chromatography. IB30 were found easier to be solubilized in low concentration of urea and easier to be refolded than IB37. Furthermore, compared to the IB30 dissolved in 8 mol/L urea, Gag protein solubilized in 2 mol/L urea was purified to higher purity with gel filtration (GF) and ion exchange (IEX) chromatography. Gag inclusion body induced at lower temperature may contain more protein with native-like or reversibly-denatured structures, and solubilization in the presence of low concentrations of urea can help to retain these structures. This study has provided new insights into the purification of proteins from inclusion bodies.