ANALYSIS AND RESEARCH ON THE KEY FACTORS OF SPORTS IN MAINTAINING HUMAN HEALTH

ABSTRACT Introduction The research on the promotion of physical fitness of the human body by exercise has also attracted widespread attention in sports and rehabilitation medicine. Object This article uses ultrasound to study the bone density health of the human body, thereby establishing the relationship between sports and bone density health. We hope to use the research results of this article to improve people’s awareness of sports health. Method We used ultrasound to test the bone mineral density of two groups of students (exercise group and non-exercise group) to explore the relationship between different sports items and the students’ bone mineral density. Results There is a significant difference in bone density between the two groups of students. There is no gender difference in bone density. Conclusion Students need to strengthen physical exercise in the growth and development stage to improve bone density. Level of evidence II; Therapeutic studies - investigation of treatment results.</div

Additional file 1 of Spatial pattern and driving factors of biomass carbon density for natural and planted coniferous forests in mountainous terrain, eastern Loess Plateau of China

Additional file 1: Annex 1. More information on multi-group SEM. Annex 2. The priori (a) and good-fitting (b) structure equation models showing the factors that have direct and indirect effects on biomass carbon density of coniferous forests in Shanxi, China. Annex 3 The priori (a) and good-fitting (b) structure equation models showing the factors that have direct and indirect effects on biomass carbon density of coniferous forests in Shanxi, China. Annex 4 Biomass carbon storage (BCS) of individual age groups of natural, planted and all coniferous forests in the study region. Annex 5 Direct, indirect and total effects of stand age (AGE), stand coverage (COV), elevation (ELE), latitude (LAT) and annual mean precipitation (PRCP) on biomass carbon density (BCD) for natural and planted coniferous forests and for all coniferous forests. Annex 6 Multi-group comparison of path coefficients between forest types. A non-significant value, highlighted in bold, indicates that the path contribution to the model is equal between forest types. Annex 7 Direct, indirect and total effects of stand age (AGE), stand coverage (COV), latitude (LAT), annual mean temperature (TEMP) and annual mean precipitation (PRCP) on biomass carbon density (BCD) for natural and planted coniferous forests and for all coniferous forests

Adsorption behaviour and mechanism of polycyclic aromatic hydrocarbons onto typical microplastics in a soil solution

Microplastics (MPs) have a tremendous potential to sorb hydrophobic organic contaminants in the soil environment. The effects of MPs in the soil systems, however, remain largely unexplored. The objective of this study was to investigate the impact of polyethylene and polystyrene MPs on the transport of the benzo[a]anthracene (BaA) and benzo[a]pyrene (BaP) in soil matrices. In this study, we investigated the sorption process of BaA and BaP in batch sorption experiments in a laboratory and systematically evaluated the particle sizes of MPs (0.8, 50, 200, and 500 μm) and the environmental factors, such as pH, ionic strength, and humic acid (HA) concentration on adsorption behaviour. The results showed that the adsorption of PAHs onto MPs reached equilibrium within 24 h. The adsorption kinetics of PAHs onto MPs were fitted well with the pseudo-first-order kinetic model. The adsorption isotherm modelling showed a better fit of the adsorption results to the Freundlich model. The thermodynamic research indicated the adsorption of BaA and BaP as spontaneous and endothermic processes. Additionally, the adsorption capacity of BaA and BaP reached the highest when polyethylene and polystyrene MPs with a particle size of 0.8 μm and 50 μm, respectively. The sorption of BaA and BaP on PE and PS MPs was significantly influenced by pH and the peaking at pH 5.0 and 7.0, respectively. Furthermore, the adsorption mechanisms of the BaA and BaP on MPs were dominated by electrostatic interaction, π–π interactions, and hydrophobic interaction.</p

Occurrence and Relationship of Organophosphorus Insecticides and Their Degradation Products in the Atmosphere in Western Canada Agricultural Regions

This paper presents the atmospheric occurrence and seasonal variations of the most frequently detected organophosphorus insecticides (OPs) and their OP oxon degradation products at Bratt’s Lake, Saskatchewan in the Canadian Prairies (April 2003 to March 2004, January−December, 2005) and at Abbotsford in the Lower Frazer Valley (LFV) of British Columbia from May 2004 to December, 2005. During 2005 there were 10 OPs, 8 OP oxons, and 6 other OP degradation products measured. The most frequently detected OPs were chlorpyrifos, malathion, and diazinon. At Bratt’s Lake the highest atmospheric concentrations were observed for chlorpyrifos, with maximum concentrations observed during July and August in 2003 showing much higher concentrations than those from 2005. This was related to its usage for grasshopper control in the province. At Abbotsford, diazinon and malathion were observed in much higher atmospheric concentrations than chlorpyrifos. Concentrations reached maximum in spring for diazinon and summer for malathion. This study is the first reported study of seasonal variations of OP oxons with their parent OP. Chlorpyrifos oxon concentrations during July were generally low, indicating strong local source contributions. The chlorpyrifos oxon/chlorpyrifos ratio and diazinon oxon/diazinon ratio showed a strong seasonal variation with increasing ratio from spring to summer which was attributed to increasing sunlight hours. Malathion oxon/mathion at both sites was similar and relatively constant throughout the year. The oxon/thion ratio represents a good indicator of age of source or contributions from local versus regional atmospheric sources

Electrogenerated Chemiluminescence Biosensor Based on Functionalized Two-Dimensional Metal–Organic Frameworks for Bacterial Detection and Antimicrobial Susceptibility Assays

The emergence of antibiotic resistance has prompted the development of rapid antimicrobial susceptibility testing (AST) technologies to guide antibiotic prescription. A novel electrochemiluminescence (ECL) biosensor developed can quantitatively measure the binding between the lectin and lipopolysaccharide (LPS) on Gram-negative bacteria for bacterial determination and to characterize the antimicrobial activities of β-lactam and non-β-lactam antibiotics to normal and antibiotic-resistant bacteria. The biosensor utilizes ruthenium complex tagged concanavalin A (Ru-Con A) coated on NH2-MIL-53­(Al) interface for LPS binding measurements. The decreased ECL signal obtained was directly proportional to increasing Escherichia coli (E. coli) BL21 concentrations. The sensitivity displayed logarithmic dependence in the range of (50–5.0) × 104 cells/mL, with a detection limit of 16 cells/mL. The minimum inhibitory concentration (MIC) values of antibiotics for normal E. coli BL21 were 0.02–0.2, 2–4, 0.002–0.02, and 0.2–1 mg/L for levofloxacin hydrochloride (LVX), tetracycline (TCY), imipenem (IPM), and cefpirome (CPO), respectively. The increased MIC values (8–16 and 4 mg/L for IMP and CPO, respectively) in New Delhi metallo-β-lactamase-1 expressing E. coli BL21 (NDM-1-E. coli BL21) indicated greater resistance to β-lactams in NDM-1-E. coli BL21 compared with normal E. coli BL21. Therefore, the changed ECL signal because of binding between LPS with the lectin has a relation with the type of antibiotic and bacterial strains, making the ECL biosensor promote clinical practicability and facilitate antibiotic stewardship

The identified compounds of root exudates from <i>S. alfredii</i>.

The identified compounds of root exudates from S. alfredii.</p

Sample scores for the first (PC1) and second (PC2) principal components from the principal component analysis for identified root exudates from <i>S. alfredii</i>.

Sample scores for the first (PC1) and second (PC2) principal components from the principal component analysis for identified root exudates from S. alfredii.</p

Repeatability of the data.

<p>Repeatability of the data.</p

Changes in dry weights, Cd concentrations and Cd accumulation in various tissues of <i>S. alfredii</i> with exposure to supplying Cd levels for 4 days.

<p>Changes in dry weights, Cd concentrations and Cd accumulation in various tissues of <i>S. alfredii</i> with exposure to supplying Cd levels for 4 days.</p

Data_Sheet_1_A Novel Full-Length Transcriptome Resource for Sea Cucumber Apostichopus japonicus Using Pacbio SMRT Sequencing.docx

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