There has been carried out a comparative research, which allow us to determine the quantities and the central points of accumulation ofPb, Cu, Zn and Cd in the vegetative and reproductive organs of the four sorghum va...There has been carried out a comparative research, which allow us to determine the quantities and the central points of accumulation ofPb, Cu, Zn and Cd in the vegetative and reproductive organs of the four sorghum varieties （technical sorghtan, sugar sorghum, sudan grass and grain sorghnm）, as well as to ascertain the possibilities for their growth in soils contaminated with heavy metals and their application for phytoremediation purposes. The experimental plots were situated at different distances （0.1 and 15.0 kin） from the source of pollution-the Non-Ferrous Metal Works near Plovdiv, Bulgaria. On reaching commercial ripeness, the crops were gathered and the concentrations of Pb, Cu, Zn and Cd in their different parts-roots, stems, leaves and gains-were determined through dry mineralization. To determine the heavy metal content in the samples, ICP was used. A clearly distinguished trend exists which describes the accumulation of heavy metals within the vegetative and reproductive organs of the studied crops. Sudan grass and technical sorghum accumulated larger heavy metal quantities compared to sugar sorghum and grain sorghum, as the majority of the heavy metals was retained by the roots and a very small amount was translocated to epigeous parts. The depots for accumulation were in the following order： roots 〉 leaves 〉 stems 〉 grains. The studied crops can be related to metal-tolerant crops and can be cultivated on softs which are of low, medium or high contamination with lead, zinc and cadmium, as they do not exhibit a tendency of accumulating these elements in grains at levels above the maximum permissible concentrations for fodder. The selective accumulation of Pb, Cu, Zn and Cd in the roots and the possibility to remove the root-remains makes technical sorghum, sugar sorghum and Sudan grass extremely suitable for phytoremediation purposes. The possible use of grains for animal food guarantees the economic expedience upon the selection of these crops.展开更多
Objective: To investigate the effect of Zao Huang Mixture (藻黄合剂ZHM) on expressions of growth factor-β1 (TGF-β1) and collagen IV (Col IV) in human glomerular mesangial cells (GMC) cultured in high-glucose environ...Objective: To investigate the effect of Zao Huang Mixture (藻黄合剂ZHM) on expressions of growth factor-β1 (TGF-β1) and collagen IV (Col IV) in human glomerular mesangial cells (GMC) cultured in high-glucose environment. Methods: After primary culture of GMC, in vitro culture was carried out in normal group, high glucose group and high glucose medium with ZHM of different concentrations, and the expressions of TGF-β1 and Col IV in the GMC group and in ZHM group were detected at 24 and 48 h respectively. Results: Compared with the normal group, expressions of TGF-β1 and Col IV significantly increased at 24 h, 48 h in the high glucose group (all P<0.01); Compared with the high glucose group, the expressions of TGF-β1 and Col IV in all the ZHM groups significantly decreased at 24 h, 48 h (P<0.05 or P<0.01). Conclusion: ZHM may modulate the process of diabetic nephropathy by changing the expression of TGF-β1 and Col IV in glomerular mesangial cells.展开更多
文摘There has been carried out a comparative research, which allow us to determine the quantities and the central points of accumulation ofPb, Cu, Zn and Cd in the vegetative and reproductive organs of the four sorghum varieties （technical sorghtan, sugar sorghum, sudan grass and grain sorghnm）, as well as to ascertain the possibilities for their growth in soils contaminated with heavy metals and their application for phytoremediation purposes. The experimental plots were situated at different distances （0.1 and 15.0 kin） from the source of pollution-the Non-Ferrous Metal Works near Plovdiv, Bulgaria. On reaching commercial ripeness, the crops were gathered and the concentrations of Pb, Cu, Zn and Cd in their different parts-roots, stems, leaves and gains-were determined through dry mineralization. To determine the heavy metal content in the samples, ICP was used. A clearly distinguished trend exists which describes the accumulation of heavy metals within the vegetative and reproductive organs of the studied crops. Sudan grass and technical sorghum accumulated larger heavy metal quantities compared to sugar sorghum and grain sorghum, as the majority of the heavy metals was retained by the roots and a very small amount was translocated to epigeous parts. The depots for accumulation were in the following order： roots 〉 leaves 〉 stems 〉 grains. The studied crops can be related to metal-tolerant crops and can be cultivated on softs which are of low, medium or high contamination with lead, zinc and cadmium, as they do not exhibit a tendency of accumulating these elements in grains at levels above the maximum permissible concentrations for fodder. The selective accumulation of Pb, Cu, Zn and Cd in the roots and the possibility to remove the root-remains makes technical sorghum, sugar sorghum and Sudan grass extremely suitable for phytoremediation purposes. The possible use of grains for animal food guarantees the economic expedience upon the selection of these crops.
文摘Objective: To investigate the effect of Zao Huang Mixture (藻黄合剂ZHM) on expressions of growth factor-β1 (TGF-β1) and collagen IV (Col IV) in human glomerular mesangial cells (GMC) cultured in high-glucose environment. Methods: After primary culture of GMC, in vitro culture was carried out in normal group, high glucose group and high glucose medium with ZHM of different concentrations, and the expressions of TGF-β1 and Col IV in the GMC group and in ZHM group were detected at 24 and 48 h respectively. Results: Compared with the normal group, expressions of TGF-β1 and Col IV significantly increased at 24 h, 48 h in the high glucose group (all P<0.01); Compared with the high glucose group, the expressions of TGF-β1 and Col IV in all the ZHM groups significantly decreased at 24 h, 48 h (P<0.05 or P<0.01). Conclusion: ZHM may modulate the process of diabetic nephropathy by changing the expression of TGF-β1 and Col IV in glomerular mesangial cells.
