[Effects of long-term fertilization on soil microbial abundance in farmland of the Loess Plateau, China].

Based on a long-term experiment in the Changwu Agro-ecological Experimental Station, the real-time PCR analysis was used to examine the soil microbial abundance and to reveal the effects on soil microbial community under different long-term fertilization systems. The results showed that compared to the CK (barren field), the population of bacteria increased by 21% and archaea by 32% in treatment with inorganic fertilizer application. The abundance of bacteria in the treatment of chemical fertilizer combined with organic fertilizer increased by 37% and archaea by 36%.

[Expression of vitronectin in placental basal plate and its relationship with the pathogenesis of severe preeclampsia].

Objective: To investigate the expression of vitronectin (VN) in placental basal plate and its relationship with the pathogenesis of severe preeclampsia.

Methods: From March 2010 to December 2011, 17 patients with early-onset severe preeclampsia who delivered in the Second Hospital of Jilin University were recruited as the early-onset severe preeclampsia group; and 16 women were recruited as the late-onset severe preeclampsia group. Meanwhile, 15 healthy pregnant women who delivered before 34 weeks were defined as the early control group (termination of pregnancy was carried out because of fetal heart malformations), and 15 healthy pregnant women delivered after 34 weeks were defined as the late control group.

[Epidemiological and clinical analysis of Mycoplasma pneumoniae infection in children with acute respiratory tract infection].

Objective: To summarize the epidemiology and clinical characteristics of Mycoplasma pneumoniae (MP) infection in children with acute respiratory tract infection (ARI) in Guangzhou.

Methods: MP was detected using an indirect immunofluorescent method in 2084 children with ARI. The relations between MP infection rate and the gender, age, season, site of infection and wheezing diseases were analyzed.