The influence of increased precipitation and nitrogen deposition on the litter decomposition and soil microbial community structure in a semiarid grassland.

Litter decomposition is a major method in which nutrients are recycled, especially carbon and nitrogen elements, in terrestrial ecosystems. However, how the responses of litter quality and soil microbial communities to global changes alter litter decomposition remains unclear. A 4-year field manipulative experiment based on the litterbag method was conducted in a typical temperate semiarid grassland in China to explore how increased precipitation and nitrogen deposition affect decomposition processes via litter quality and soil microbial communities.

Association between hypokalemia and small bowel capsule endoscopy completion rates in patients in South China: A prospective single-center study.

Background/aims: Approximately 20-30% of small bowel capsule endoscopies (SBCEs) do not reach the cecum at the completion of the examination. We aimed to determine whether hypokalemia influences the completion rate and small bowel transit time (SBTT) of SBCE.

Patients And Methods: From January to December 2017, 112 patients (18-75 years old) who underwent SBCE were assessed consecutively for enrolment in our study.

[Effects of Different Substrates and Particle Sizes on Wastewater Purification].

Choosing suitable substrate is key to improving the efficiency of wetland decontamination. However, little is known about the effect of particle size. In order to study the effect of substrate type and size on COD, TN, and TP removal from sewage, 1-2, 2-4, and 4-8 mm zeolite, 2-4, 4-8, and 8-16 mm gravel, and 2-4, 3-5, and 6-8 mm anthracite were selected for establishment of the constructed system of experimental media with three replications.

[Effects of Short-term Exogenous Nitrogen and Carbon Input on Soil Respiration Under Changing Precipitation Pattern].

The responses of soil respiration to exogenous carbon (C) and nitrogen (N) inputs under changing precipitation patterns were explored via in-situ field experiments. In 2014, a typical temperate grassland on the Xilin River of Inner Mongolia was taken as the research site, and soil respiration was measured in the following treatments:addition of water alone (CK), addition of water + N fertilizer[CN, 2.5 g·(m·a)], addition of water + labile C[CG, 24 g·(m·a)], and addition of water + N fertilizer+ labile C[CNG, 2.

Efficacy of two different dosages of levofloxacin in curing Helicobacter pylori infection: A Prospective, Single-Center, randomized clinical trial.

Bismuth + proton pump inhibitor (PPI) + amoxicillin + levofloxacin is one of the bismuth quadruple therapy regimens widely used for the eradication of H. pylori infection. The recommended dosage of levofloxacin is 500 mg once daily or 200 mg twice daily to eradicate H.

[Comparative clinical observation of the short-term bone fusion effect of composite biosynthetic bone and ilium auto-grafting].

Objective: To evaluate the short-term bone fusion after implantation of composite biosynthetic bone made of coralline hydroxyapatite composite (CHC) as a substitute for autologous bone grafting.

Methods: A clinical sequential trial was designed and the biosynthetic bone and the patient's ilium were respectively used in the treatment of femoral nonunions and interbody fusion. X-ray examinations were performed 10 weeks after the operations and the bone fusion was graded according to Lane-Sandhu's method.