[Comparative Study of Clinical Manifestations and Sleep Structure in Children with Obstructive Sleep Apnea-hypopnea Syndrome with Different BMI].

Objective: To compare and analyze the clinical manifestations and sleep structure of children with obstructive sleep apnea-hypopneasyndrome (OSAHS) with different body mass index (BMI).

Methods: 452 children who were diagnosed with OSAHS between December 2016 and February 2021 by the Department of Respiratory Medicine, Children's Hospital of Soochow University were included in the study. All of them did polysomnography (PSG).

[Effects of topographic factors on leaf traits of apricot in the Loess Plateau, Northwest China].

As important topographic factors, slope aspect and gradient affect plant growth and leaf functional traits by regulating the combination of water and heat. Exploring the response of leaf functional traits to topographic factors is helpful for understanding plant adaptation strategies. We investigated the effects of sunny slope (including half sunny slope) and shady slope (including half shady slope) and three slope gradient (15°-20°, 21°-25°, and 26°-30°) on the leaf functional traits of apricot (Prunus armeniaca L.

Elevational variations of leaf stochiometry in Leontopodium leontopodioides on the Qinghai-Tibetan Plateau, China.

Topography has major impacts on the trade-off of plant survival strategies. Exploring the differential pattern of leaf ecological stoichiometry along the elevation gradient contributes to a better understanding of plant's response to environmental changes and its ecological adaptability. We investigated leaf C, N, and P concentrations and stoichiometric ratios of Leontopodium leontopodioides at three elevations, including from 4400 m to 4700 m, from 4701 m to 5000 m, and from 5001 m to 5300 m, on the northeastern margin of the Qinghai-Tibetan Plateau in China.

[Effects of grassland management on soil nutrients and their spatial distribution on the Qinghai-Tibetan Plateau, China].

After grasslands were contracted to individual households on the Qinghai-Tibetan Pla-teau, two grassland management patterns were formed, i.e., the single-household management pattern (SMP) and the multi-household management pattern (MMP).