Subjects: Geosciences >> Atmospheric Sciences submitted time 2023-02-27 Cooperative journals: 《干旱区地理》
Abstract： Solar radiation is the primary energy source of the earth’s system and is closely related to human life. By selecting the monthly sunshine hour data of 50 meteorological observation stations in the Qinghai Plateau of China from 1961 to 2020, the spatiotemporal variation characteristics of sunshine hours in the Qinghai Plateau as a whole, different latitudes, and different altitudes were analyzed. The results are as follows: (1) The annual sunshine hours in the Qinghai Plateau exhibit a significant downward trend from 1961 to 2020, and a sudden decrease occurred in 2004. From the perspective of spatial distribution, the annual sunshine hours in other regions showed a significant decreasing trend except that the sunshine hours in some southern stations is flat or slightly increased. And the decreasing trend is most significant in Qaidam area and eastern agricultural area. (2) The decreasing trend of sunshine hours in high-latitude areas is significantly greater than that in low-latitude areas of the Qinghai Plateau. The variation trend of sunshine hours at different latitudes in spring is small. In summer and winter, the decreasing trend of sunshine hours at relatively high latitudes is significantly greater than that at low latitudes, and in autumn, the decreasing trend of sunshine hours at low and high latitudes is significantly greater than that at middle latitudes. (3) The decreasing trend of annual sunshine hours in relatively low-altitude areas of the Qinghai Plateau is significantly greater than that in relatively high-altitude areas. The change trend of sunshine hours at different altitudes in spring is small, flat, or slightly reduced. The decreasing trend of sunshine hours at relatively low altitudes is significantly greater than that at higher altitudes in summer and winter. The sunshine hours at different altitudes in autumn exhibit a decreasing trend, but there is a significant difference in the decreasing trend.
Subjects: Medicine, Pharmacy >> Preclinical Medicine submitted time 2018-01-25 Cooperative journals: 《南方医科大学学报》
Abstract： Objective To study the effect of rutin on body weight and obesity-induced reproductive impairment in male mice. Methods Twenty-four male mice were randomized equally into normal control group, high-fat diet group (HFD group), and HFD+rutininterventiongroup(HRUgroup).After28daysoftreatments,thetestesandepididymisofthemicewerecollected for detection of total cholesterol (TC) and triglycerides (TG) levels and for pathological examinations with HE staining. The expressions of related genes was detected with real-time PCR, and Western blotting was used to detect the expression of Ucp1 protein in the samples. Results After 28 days of treatments, the mean body weight was lower in mice with rutin intervention than in those in HFD group. The mice in HFD group showed significantly higher TG levels in the testis and epididymis and higher TC levels in the epididymis than those in the control and HRU groups. In HFD group, the testis and the epididymis displayed loosened structures with abnormalcell structure, and the number ofmature spermatozoa in the lumen was decreased and the mobility of the sperms was reduced; all these changes were significantly alleviated in HRU group. The expression levels of Ucp1 mRNA and protein increased (P<0.05) and the expressions of Mcp1 and TNF-α decreased significantly in the mice after rutin treatment (P<0.05). Conclusion Rutin can effectively inhibit rapid increase of body weight and protect against obesity-inducedreproductiveimpairmentinobesemice.
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