[Simulated nitrogen deposition reduces potential nitrous oxide emissions in a natural forest soil].

The reactive nitrogen deposition in subtropical region of China has been increasing annually, which affects biogeochemical processes in forest soils. In this study, three treatments were established, including control (no N addition, CK), low nitrogen deposition (40 kg·hm·a, LN), and high nitrogen deposition (80 kg·hm·a, HN) to study the response of denitrifying functional genes and potential NO emissions to simulated nitrogen deposition in the soils of a natural forest. Results showed that HN significantly decreased soil potential NO emission, while 8-year nitrogen deposition did not affect the abundances of , , Ⅰ and Ⅱ.

[Responses of soil ammonia-oxidizing microorganisms to simulated nitrogen deposition in a natural forest].

Subtropical region of China is one of the global hotspots receiving nitrogen deposition. Nitrogen deposition could affect the abundance and community structure of ammonia oxidizers including ammonia-oxidizing bacteria (AOB), ammonia-oxidizing archaea (AOA) and complete ammonia oxidizer (comammox ), with consequences on soil nutrient cycling that are driven by microorganisms. There is limited understanding for the newly discovered comammox in the subtropical forest soils.

[Long-term effects of imbalanced fertilization with lime and gypsum additions on denitrifying functional genes of an Ultisol at Yingtan, Jiangxi, China].

The abundance of denitrifying functional genes plays a key role in driving the soil nitrous oxide (NO) emission potential. Nitrite reductase genes ( and ) and nitrous oxide reductase genes ( and ) are the dominant denitrifying funtional genes. In this study, real-time quantitative PCR was conducted to evaluate the effects of 32-year imbalanced fertilization and lime and gypsum additions on the abundances of , , and genes in an Ultisol at Yingtan, Jiangxi Province.

Occupational Health Risk Assessment of Benzene, Toluene, and Xylene in Shanghai.

Objective: This study was designed to conduct a retrospective and systematic occupational health risk assessment (OHRA) of enterprises that used benzene, toluene, and xylene (BTX) in Shanghai, China.

Methods: All data for the study were obtained from 1,705 occupational health examination and evaluation reports from 2013 to 2017, and a semiquantitative model following Chinese OHRA guidelines (GBZ/T 298-2017) was applied for the assessment.

Results: The selected enterprises using BTX were mainly involved in manufacturing of products.

[Responses of denitrifying functional gene abundance to long-term fertilization regimes in an upland Ultisol].

Fertilization affects soil nitrogen cycling and nitrous oxide (NO) emissions, which are mainly driven by microbes. A 32-year field experiment was conducted to investigate the effects of chemical fertilizers and their combination with organic materials on the abundance of denitrifying functional genes (, , I and II) in Ultisol. The treatments comprised no fertilizer (CK), chemical fertilizer, chemical fertilizer+peanut straw, chemical fertilizer+rice straw, chemical fertilizer+radish and chemical fertilizer+pig manure.

In vitro and in vivo evaluation of the developed PLGA/HAp/Zein scaffolds for bone-cartilage interface regeneration.

Objective: To investigate the effect of electronspun PLGA/HAp/Zein scaffolds on the repair of cartilage defects.

Methods: The PLGA/HAp/Zein composite scaffolds were fabricated by electrospinning method. The physiochemical properties and biocompatibility of the scaffolds were separately characterized by scanning electron microscope (SEM), transmission electron microscope (TEM), and fourier transform infrared spectroscopy (FTIR), human umbilical cord mesenchymal stem cells (hUC-MSCs) culture and animal experiments.

[Effect of hypervolemic hemodilution on C-reactive protein level in patients receiving spinal surgery].

Objective: To investigate the changes in high-sensitivity C-reactive protein (hs-CRP) levels following acute hypervolemic hemodilution (AHH) in patients undergoing spinal surgery and assess the safety of AHH in terms of postoperative infection.

Methods: Forty patients undergoing spinal operation were randomly assigned into observation group and control group (n=20). Each patient was infused 4 ml/kg/h lactated Ringers solution for maintenance of the total blood volume, and in the observation group, the patients received additional infusion of 4% gelofusine solution at the rate of 20 ml/kg/h 30 min before the operation.

Long-term clinical observation of the immunogenicity of inactivated hepatitis A vaccine in children.

110 children who were given the complete course of the inactivated hepatitis A vaccine (Havrix) were followed up 10 years later. Age-matched healthy children who were not inoculated served as controls. One month after two primary injections, all children were positive for serum antibody.