The relationship between physical exercise and school adaptation of junior students: A chain mediating model.

Objective: This study explores the relationship between physical exercise and school adaptation of junior middle school students and constructs a chain intermediary model through the intermediary role of psychological resilience and sports learning motivation.

Methods: Using the stratified cluster sampling method, 930 junior middle school students in Anhui Province were measured in group psychology by using the physical exercise rating scale, adolescent psychological resilience scale, physical learning motivation scale and school adaptation scale. The statistical software SPSS 23.

[Alleviative effects of nitric oxide on the biological damage of spirulina platensis induced by enhanced ultraviolet-B].

Continuing depletion of the stratospheric ozone layer by atmospheric pollutants, in particular chlorofluorocarbons (CFCs), has resulted in an increasing incidence of solar UV-B (280-320 nm) at the Earth's surface. Enhanced UV-B radiation has been considered as important global environmental problem and results in important effects to mankind and the entire global ecosystem. Nitric oxide (NO) is not only a toxic molecule, one of reactive nitrogen species (RNS), but also an important redox-active signaling molecule.

Association of interleukin-1B (IL-1B) gene polymorphisms with risk of gastric cancer in Chinese population.

The incidence of gastric cancer (GC) in China is among the highest in the world. In present work, 154 patients with GC and 166 healthy controls in population of north-western China were investigated to evaluate the genetic associations of IL-1B gene single nucleotide polymorphisms (SNP) and variable number tandem repeat (VNTR) polymorphisms of IL-1RN gene with increased risk of GC. The frequency of IL-1B+3954C/T was significantly higher in GC cases group (25.

[Effect of enhanced UV-B radiation on competition among several plant species].

The effect of enhanced UV-B radiation (280-315 nm, approximating a 15% ozone layer reduction) on competitive interaction between spring wheat (Triticum aestivum) and wild oat (Avena fatua) was examined in the field. The density-dependent mortality of both wheat and wild oat did not exhibit a significant difference between control and UV-B treatments. A relatively high degree of competitive stress enhanced the effect of UV-B stress on biomass reduction.

[Effects of the enhanced UV-B radiation on the body cell mitosis of the wheat].

The chromosomal mutation and mitosis of the wheat (Triticum aestivum, cv. 93-4736) were observed under the condition of the enhanced ultraviolet-B radiation. The results showed that the number of cells in mitosis of the UV-B treatments was 68.

The damage repair role of He-Ne laser on plants exposed to different intensities of ultraviolet-B radiation.

Light-grown broad bean (Vicia faba L.) seedlings were subjected to different intensities of UV-B radiation (0, 0.05, 0.