Soil enzyme activities are sensitive indicators of soil quality. However, their spatial hetero-geneity and the influencing factors are not well known. In this study, geostatistics, Kriging method, one-way ANOVA and correlation analyses were used to examine the spatial variability and influencing factors of activities of six soil hydrolases: β-1,4-glucosidase (βG), β-1,4-xylosidase (βX), cellobiohydrolase (CBH), β-1,4-N-acetylglucosaminidase (NAG), leucine amino peptidase (LAP), and acid phosphatase (AP) in 0-10 cm soil layers in a karst catchment in Guizhou Pro-vince, China.
View Article and Find Full Text PDFBackground: MicroRNAs (miRNAs) are small non-coding RNAs that bind messenger RNAs and promote their degradation or repress their translation. There is increasing evidence of miRNAs playing an important role in alcohol related disorders. However, the role of miRNAs as mediators of the genetic effect on alcohol phenotypes is not fully understood.
View Article and Find Full Text PDFPlateau zokor (Myospalax baileyi) is one of the major rodent species at the alpine meadow in Three Rivers Headwater Region. They eat plant roots, excavate many tunnels and deposit soil on the surface, which result in many exposed mounds to cover the aboveground part of plants. Here, taking plateau zokor mound density in a plot as their disturbance degree, we selected seven plots with different plateau zokor mound densities and one control plot which was not disturbed by plateau zokor to explore the effects of M.
View Article and Find Full Text PDFPurpose: Tumor-associated microRNAs have been detected in cancer, though whether plasma microRNA-155 (miR-155) could be a potential biomarker for laryngeal squamous cell carcinoma (LSCC) prognosis is unclear. We aimed to determine how miR-155 can be used to predict the clinical characteristics of patients with LSCC and correctly diagnose them.
Materials And Methods: We collected tissue samples and peripheral blood samples before and after treatment from 280 LSCC cases and 560 controls.
Fen Zi Xi Bao Sheng Wu Xue Bao
August 2007
The paraffin sectioning, histochemistry and phytochemistry methods were applied in the study of the localization and the content changes of saponins and flavonoids in the vegetative organs in Bupleurum Chinense DC. The results showed that the saponins distributed in vascular cambium and secondary phloem of the root; In the stem, they distributed mainly in epiderm,collenchyma and the epithelial cells of the secretory canals which lied in cortex and pith; In the leaf, they distributed in the epiderm and spongy and palisade. However, flavonoids distributed in epiderm, collenchyma, cortex, pith path and myelin shealth cells of the stem; In the leaf, they were located mainly in the epiderm and the collenchyma.
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