[Estimation of Cropland Nitrogen Runoff Loss Loads in the Yangtze River Basin Based on the Machine Learning Approaches].

A quantitative understanding of cropland nitrogen (N) runoff loss is critical for developing efficient N pollution control strategies. Using correlation analysis, a structural equation model, variance decomposition, and machine learning methods, this study identified the primary influencing factors of total N (TN) runoff loss from uplands (=570) and paddy (=434) fields in the Yangtze River Basin (YRB) and then developed a machine learning-based prediction model to quantify cropland N runoff loss load. The results indicated that runoff depth, soil N content, and fertilizer addition rate were the major influencing factors of TN runoff loss from uplands, whereas TN runoff loss rate from paddy fields was mainly regulated by runoff depth and fertilizer addition rate.

BaCuInSe: A Wide-Bandgap Copper Indium Selenide Reveals Strong Luminescence and Third-Harmonic Generation.

A new copper indium selenide, BaCuInSe, was synthesized by the KBr flux reaction at 800 °C. The compound crystallizes with orthorhombic , = 46.1700(12) Å, = 4.

[Estimation of Nitrous Oxide Emission from River System Based on Water Discharge and Dissolved Nitrous Oxide Concentration].

Due to increasing active nitrogen pollution loads, river systems have become an important source of nitrous oxide (NO) in many areas. Due to the lack of monitoring data in many studies as well as the difficulty in estimating intermediate parameters and expressing temporal-spatial variability in current methods, a high level of uncertainty remains in the estimates of riverine NO emission quantity. Based on the monthly monitoring efforts conducted for 10 sampling sites across the Yonganxi River system in Zhejiang Province from June 2016 to July 2019, the temporal and spatial dynamics of riverine NO dissolved concentrations (NO), NO fluxes, and their influencing factors were addressed.

[Case-control study on single locking plate and locking plate with suture anchors for the treatment of unstable distal clavicle fractures].

Objective: To compare therapeutic effects of single locking plates and locking plates with suture anchors in treating type Neer IIb distal clavicle fractures.

Methods: From January 2013 to January 2015, 40 distal clavicle fractures patients with Neer IIb were treated by retrospectively analyzed and divided into single locking plates (control group) and locking plates with suture anchors(observation group) according to methods of operation. There were 20 patients in control group treated by single locking plates, including 16 males and 4 females aged from 26 to 64 years old with an average of(40.

Experimental infections of mosquitoes with severe fever with thrombocytopenia syndrome virus.

Background: Severe fever with thrombocytopenia syndrome (SFTS) is a newly identified emerging infectious disease, which is caused by a novel bunyavirus (termed SFTSV) in Asia. Although mosquitoes have not been identified as the primary vectors, as revealed by epidemiological surveys, their role in transmitting this SFTSV as a suspicious vector has not been validated.

Findings: In this study, we conducted experimental infections of mosquitoes with SFTSV to examine the role of mosquitoes in the transmission of the virus.

Relationship between Iodine Content in Household Iodized Salt and Thyroid Volume Distribution in Children.

Objective: To assess the effect of different levels of salt iodine content on thyroid volume (ThV) distribution using data from the 1999, 2011, and 2014 Chinese national iodine deficiency disorder (IDD) surveys.

Methods: Probability proportion to size (PPS) sampling method was used to obtain a representative national sample of 34,547, 38,932, and 47,188 Chinese children aged 8-10 years in 1999, 2011, and 2014 Chinese national IDD surveys, respectively. The iodine content in household iodized salt and urinary iodine concentration were measured and thyroid ultrasound examination was performed.

Multienzymatic cascade synthesis of fucosyloligosaccharide via a two-step fermentation strategy in Escherichia coli.

Objectives: To achieve multienzymatic cascade synthesis of fucosyl oligosaccharide from D-mannose by two-step fermentation pathway in Escherichia coli.

Results: E. coli BL21(DE3) harboring pET-22b(+) vectors with six genes, i.

[Relaxation laryngoplasty in the management of mutational falsetto].

Objective: To observe the result of relaxation laryngoplasty in the management of mutational falsetto.

Methods: The thyroplasty type 3 was applied and improved (the saturation was improved in the traditional operation, which the thyroid cartilage stick was cut off and overlapped without saturation in improved group 1, while the thyroid cartilage stick was not cut off and overlapped inward without saturation in improved group 2) in 30 adult patients who failed in voice modification. Preoperative and postoperative fundamental frequency (F0), normalised noise energy (NNE) and reading essay were compared.

[The study of tissue-engineering bone for repair of segmental bone defects].

Objective: To investigate the effect of tissue-engineering bone on repair of segmental bone defects.

Methods: Segmental bone defect of 21mm was created at sheep left metatarsus, which was then implanted with tissue-engineering bone (the experimental group) and pure porous beta-TCP (the control group) respectively. The bone defect in the blank group was left without treatment.