Mutants with overexpression of α-acetolactate synthase (ALS), α-acetolactate decarboxylase, and acetoin reductase (AR), either individually or in combination, were constructed to improve 2,3-butanediol (2,3-BD) production in Klebsiella pneumoniae. The recombinant strains were characterized in terms of the enzyme activity, 2,3-BD yield, and expression levels. The recombinant K.
View Article and Find Full Text PDFZhonghua Yu Fang Yi Xue Za Zhi
February 2013
Objective: To develop the national neglect norms for urban primary school students in China.
Methods: According to multi-stage stratified cluster sampling principle, 24 cities of 13 provinces (municipalities) in China were selected during December 1 to 31, 2008. A total of 1491 students in grade 1 - 3 and 2236 students in grade 4 - 6 were selected.
Zhonghua Liu Xing Bing Xue Za Zhi
February 2012
Objective: To investigate and analyze the situation of urban and rural neglected children aged 3 - 6, in China, so as to provide basis for the analysis and comparison on relevant risk factors.
Methods: 1163 urban children aged 3 - 6 (with 49.6% males and 4.
Zhonghua Yu Fang Yi Xue Za Zhi
January 2012
Objective: To explore the status of child neglect among urban areas children and adolescents aged 3 - 17 years in China.
Methods: Using multi-stage stratified cluster sampling method, 8001 children and adolescents were recruited from 30 cities of 14 provinces in December 2008. The investigation was carried based on The 3 - 6 years old children Neglect Norms of city in China and The 6 - 17 years old children Neglect Norms of city in China.
Zhonghua Yu Fang Yi Xue Za Zhi
January 2012
Objective: To explore the status of child neglect among rural areas children aged 0 - 6 years in China.
Methods: A total of 7411 rural children aged 0 - 6 years old who were composed of two age groups (3315 children aged 0 - 2 years old and 4096 children aged 3 - 6 years old) were multistage stratified randomly sampled from 84 villages which were representative of 10 provinces of China, in accordance with sex and age in November 2010. To identify the child neglect based on the Neglect Norms for Children Aged 0 to 2 and 3 to 6 Years Old in Rural Areas of China, SPSS 13.