Extracts of twelve medicinal polyherbal preparations in powder form sold at retail shops were tested for mutagenicity using Ames in vitro test. Five of the polyherbal preparations were found to be mutagenic (p ≤ 0.05...Extracts of twelve medicinal polyherbal preparations in powder form sold at retail shops were tested for mutagenicity using Ames in vitro test. Five of the polyherbal preparations were found to be mutagenic (p ≤ 0.05) at 250 μg/ml. Two mutagenic preparations comprised of traditionally used medicinal plants with no mutagenicity property being reported. However, one polyherbal preparation which contained one mutagenic plant was found not mutagenic. Under the conditions of this study, it can be concluded that some polyherbal preparations were potentially mutagenic and mutagenicity of polyherbal preparation cannot always be deduced from the mutagenicity status of each individual plant components of the polyherbal preparations.展开更多
Wastewater of hospitals contains materials that would be a threat to alive. These water needs to be checked by a biological purification before leaving to nature. Hospital wastewater has differences than domestic wast...Wastewater of hospitals contains materials that would be a threat to alive. These water needs to be checked by a biological purification before leaving to nature. Hospital wastewater has differences than domestic waste because of especially blood, body waste, drugs, chemicals, medical device waste and radioactive materials. We aimed to determine genotoxic effects of total pollution in hospital wastewater on alive by Salmonella microsome test method. In this study, we decided on three hospitals which weren’t checked as biological purification of waste. The samples were taken for six 1-week periods between March 2009 and June 2009. Mutagenite studies of samples taken from hospitals were made with ,Salmonella typhimurium TA 98 and TA 100. Wastewater samples were evaporated. 27 different test materials were prepared using DMSO, ethanol and acetone solvents, two different MGA plaques were used for each test material. Each experiment was made for 3 times with known results of mutagens and we made it ready for “Ames” test method. We had genotoxicity 50% in Istanbul University Medical Faculty Hospital, 56% in Haseki Hospital and 61% in Vak?f Gureba Hospital. According to three hospitals result there are 9 positives, 9 negatives in DMSO;9 positives, 9 negatives in ethanol;12 positives, 6 negatives in acetone. These values are totally 56%. Our results give important information about mutagenic effect of total pollution in hospital wastewater. It is first time researched in Turkey that effect on DNA of pollution is from hospital wastewaters. In prospective studies, it is necessary to use this system as a method to monitor mutagenic genotoxic pollution in hospital wastewaters. These kinds of studies present applicability and importance of our method because of placing in the literature. Method constitutes a new approach to check mutagenite of pollution in hospital wastewater.展开更多
D 类放大器指 PWM状态的开关型放大器,由于其末级功率输出级工作于开关状态,因而效率比 C 类放大器高。目前集成化 D 类放大器效率高达80～90%,155W 输出功率的 D 类放大集成电路外形尺寸仅40mm×17mm×7mm。本文介绍日本东芝...D 类放大器指 PWM状态的开关型放大器,由于其末级功率输出级工作于开关状态,因而效率比 C 类放大器高。目前集成化 D 类放大器效率高达80～90%,155W 输出功率的 D 类放大集成电路外形尺寸仅40mm×17mm×7mm。本文介绍日本东芝公司生产的 TA2022-100集成电路。展开更多
走在通达的公路上,是否想过那些幕后的筑路与养护设备?作为徐工最新款筑路与养护拍档XS395型单钢轮振动压路机和XLY100TA型路面养护车一定会让你觉得眼前一亮。徐工单钢轮振动压路机的生产由来已久,在经历过早期电控系统可靠性的质疑后...走在通达的公路上,是否想过那些幕后的筑路与养护设备?作为徐工最新款筑路与养护拍档XS395型单钢轮振动压路机和XLY100TA型路面养护车一定会让你觉得眼前一亮。徐工单钢轮振动压路机的生产由来已久,在经历过早期电控系统可靠性的质疑后,如今已成为国产品牌压路机的标杆。在bauma China 2014展会上,徐工推出一款39t新型超大吨位全液压单钢轮振动压路机XS395。这款有着"全球之最"美誉的压路机产品,在巨头云集的展会上独树一帜,展开更多
文摘Extracts of twelve medicinal polyherbal preparations in powder form sold at retail shops were tested for mutagenicity using Ames in vitro test. Five of the polyherbal preparations were found to be mutagenic (p ≤ 0.05) at 250 μg/ml. Two mutagenic preparations comprised of traditionally used medicinal plants with no mutagenicity property being reported. However, one polyherbal preparation which contained one mutagenic plant was found not mutagenic. Under the conditions of this study, it can be concluded that some polyherbal preparations were potentially mutagenic and mutagenicity of polyherbal preparation cannot always be deduced from the mutagenicity status of each individual plant components of the polyherbal preparations.
文摘Wastewater of hospitals contains materials that would be a threat to alive. These water needs to be checked by a biological purification before leaving to nature. Hospital wastewater has differences than domestic waste because of especially blood, body waste, drugs, chemicals, medical device waste and radioactive materials. We aimed to determine genotoxic effects of total pollution in hospital wastewater on alive by Salmonella microsome test method. In this study, we decided on three hospitals which weren’t checked as biological purification of waste. The samples were taken for six 1-week periods between March 2009 and June 2009. Mutagenite studies of samples taken from hospitals were made with ,Salmonella typhimurium TA 98 and TA 100. Wastewater samples were evaporated. 27 different test materials were prepared using DMSO, ethanol and acetone solvents, two different MGA plaques were used for each test material. Each experiment was made for 3 times with known results of mutagens and we made it ready for “Ames” test method. We had genotoxicity 50% in Istanbul University Medical Faculty Hospital, 56% in Haseki Hospital and 61% in Vak?f Gureba Hospital. According to three hospitals result there are 9 positives, 9 negatives in DMSO;9 positives, 9 negatives in ethanol;12 positives, 6 negatives in acetone. These values are totally 56%. Our results give important information about mutagenic effect of total pollution in hospital wastewater. It is first time researched in Turkey that effect on DNA of pollution is from hospital wastewaters. In prospective studies, it is necessary to use this system as a method to monitor mutagenic genotoxic pollution in hospital wastewaters. These kinds of studies present applicability and importance of our method because of placing in the literature. Method constitutes a new approach to check mutagenite of pollution in hospital wastewater.
文摘走在通达的公路上,是否想过那些幕后的筑路与养护设备?作为徐工最新款筑路与养护拍档XS395型单钢轮振动压路机和XLY100TA型路面养护车一定会让你觉得眼前一亮。徐工单钢轮振动压路机的生产由来已久,在经历过早期电控系统可靠性的质疑后,如今已成为国产品牌压路机的标杆。在bauma China 2014展会上,徐工推出一款39t新型超大吨位全液压单钢轮振动压路机XS395。这款有着"全球之最"美誉的压路机产品,在巨头云集的展会上独树一帜,
