Soil water-retention characteristics at measurement scales are generally different from those at application scales, and there is scale disparity between them and soil physical properties. The relationships between tw...Soil water-retention characteristics at measurement scales are generally different from those at application scales, and there is scale disparity between them and soil physical properties. The relationships between two water-retention parameters, the scaling parameter related to the inverse of the air-entry pressure （avG, cm- 1） and the curve shape factor related to soil pore-size distribution （n） of the van Genuchten water-retention equation, and soil texture （sand, silt, and clay contents） were examined at multiple scales. One hundred twenty-eight undisturbed soil samples were collected from a 640-m transect located in Fuxin, China. Soil water-retention curves were measured and the van Genuchten parameters were obtained by curve fitting. The relationships between the two parameters and soil texture at the observed scale and at multiple scales were evaluated using Pearson correlation and joint multifractal analyses, respectively. The results of Pearson correlation analysis showed that the parameter c^vG was significantly correlated with sand, silt, and clay contents at the observed scale. Joint multifractal analyses, however, indicated that the parameter ~vG was not correlated with silt and sand contents at multiple scales. The parameter n was positively correlated with clay content at multiple scales. Sand content was significantly correlated with the parameter n at the observed scale but not at multiple scales. Clay contents were strongly correlated to both water-retention parameters because clay content was relatively low in the soil studied, indicating that water retention was dominated by clay content in the field of this study at all scales. These suggested that multiple-scale analyses were necessary to fully grasp the spatial variability of soil water-retention characteristics.展开更多
Objective： To observe the therapeutic effect and mechanism of modified Banxia Houpu decoction on globus hystericus. Methods： The 95 patients with globus hystericus were randomly divided into a treatment group of 46 ...Objective： To observe the therapeutic effect and mechanism of modified Banxia Houpu decoction on globus hystericus. Methods： The 95 patients with globus hystericus were randomly divided into a treatment group of 46 cases treated with modified Banxia Houpu decoction and a control group of 49 cases treated with Manyanshuning （Granula for Clearing the Throat）. In addition, a normal group of 24 healthy people was set up. SCL-90 scale was adopted to observe the therapeutic effect, evaluate the psychological state of patients and build a database on combination of four diagnoses. Results： The effect of the modified Banxia Houpo decoction was better than that of the control group in relieving depression, anxiety and improving the psychological state （P〈0.05 or P〈0.01）. Conclusion： Modified Banxia Houpu decoction has definite therapeutic effect on globus hystericus. Its mechanism may be related to its function in relieving depression and anxiety and regulating the osvchological state.展开更多
基金Supported by the National Key Technology R&D Program in the 11th Five-Year Plan of China (Nos.2008BADA4B03 and 2009BADB3B07)
文摘Soil water-retention characteristics at measurement scales are generally different from those at application scales, and there is scale disparity between them and soil physical properties. The relationships between two water-retention parameters, the scaling parameter related to the inverse of the air-entry pressure （avG, cm- 1） and the curve shape factor related to soil pore-size distribution （n） of the van Genuchten water-retention equation, and soil texture （sand, silt, and clay contents） were examined at multiple scales. One hundred twenty-eight undisturbed soil samples were collected from a 640-m transect located in Fuxin, China. Soil water-retention curves were measured and the van Genuchten parameters were obtained by curve fitting. The relationships between the two parameters and soil texture at the observed scale and at multiple scales were evaluated using Pearson correlation and joint multifractal analyses, respectively. The results of Pearson correlation analysis showed that the parameter c^vG was significantly correlated with sand, silt, and clay contents at the observed scale. Joint multifractal analyses, however, indicated that the parameter ~vG was not correlated with silt and sand contents at multiple scales. The parameter n was positively correlated with clay content at multiple scales. Sand content was significantly correlated with the parameter n at the observed scale but not at multiple scales. Clay contents were strongly correlated to both water-retention parameters because clay content was relatively low in the soil studied, indicating that water retention was dominated by clay content in the field of this study at all scales. These suggested that multiple-scale analyses were necessary to fully grasp the spatial variability of soil water-retention characteristics.
基金supported by a grant from High-tech Project of Science & Technology Department of Jiangsu Province (No 30772839, No30873302)
文摘Objective： To observe the therapeutic effect and mechanism of modified Banxia Houpu decoction on globus hystericus. Methods： The 95 patients with globus hystericus were randomly divided into a treatment group of 46 cases treated with modified Banxia Houpu decoction and a control group of 49 cases treated with Manyanshuning （Granula for Clearing the Throat）. In addition, a normal group of 24 healthy people was set up. SCL-90 scale was adopted to observe the therapeutic effect, evaluate the psychological state of patients and build a database on combination of four diagnoses. Results： The effect of the modified Banxia Houpo decoction was better than that of the control group in relieving depression, anxiety and improving the psychological state （P〈0.05 or P〈0.01）. Conclusion： Modified Banxia Houpu decoction has definite therapeutic effect on globus hystericus. Its mechanism may be related to its function in relieving depression and anxiety and regulating the osvchological state.
