The Rocha River is a receptor to receive wastewater from household,hospital and industry,from where contaminants are transported in the river,affecting biodiversity and the ecosystem of the area.In this paper we estim...The Rocha River is a receptor to receive wastewater from household,hospital and industry,from where contaminants are transported in the river,affecting biodiversity and the ecosystem of the area.In this paper we estimated the maximum transport of total chromium and chloride anion by applying the analytical model of Ogata&Banks(1961),and the results obtained are grouped into three zones:Contaminated,transition,and uncontaminated.The analytical model was applied with 13 samples collected from the river piezometers installed near Rocha,where they are arranged in two lines,i.e.RH-1 to RH-6 as the first line and RH-9 to RH-12 as the second line.The total chromium concentrations range from 0.16 mg/L(RH-1)and 0.11 mg/L(RH-9)at the closest points to Rocha River,to 0.13 mg/L(RH-7)and 0.03 mg/L(RH-12)at the most remote points to the river.The advance of the pollutants does not exceed 50 meters with respect to the axis of the Rocha River.展开更多
Metal debris from metal-on-metal (MoM) total hip arthroplasties (THA) has been suspected to cause periprosthetic heterotopic ossifications (HO). We determined the influence of disseminated cobalt, chromium and molybde...Metal debris from metal-on-metal (MoM) total hip arthroplasties (THA) has been suspected to cause periprosthetic heterotopic ossifications (HO). We determined the influence of disseminated cobalt, chromium and molybdenum on the development of HO. Native blood samples from patients with 86 high-carbon and 16 low-carbon Co28Cr6Mo articulations were analysed by high-resolution inductively coupled plasma mass-spectrometry (HR ICP-MS). The results revealed that high-carbon metal-on-metal articulations showed lower metal blood levels (Co 1.03 to 1.60 μg/l, Cr 0.77 to 0.88 μg/l, Mo 0.45 to 0.56 μg/l) whereas low-carbon articulations achieved higher metal blood levels (Co 2.59 to 6.85 μg/l, Cr 1.25 to 3.55 μg/l, Mo 0.45 to 0.64 μg/l), but no correlation between metal ion blood level or carbon content and the development of HO could be found in these MoM articulations. Hence, metal debris from MoM articulation does not stimulate heterotopic bone formation despite other well-known local reactions.展开更多
Background: Diabetes mellitus is a common disease and it is a major cause of morbidity;several studies indicate that diabetes is a likely under reported cause of death. Chromium’s is important trace element to contro...Background: Diabetes mellitus is a common disease and it is a major cause of morbidity;several studies indicate that diabetes is a likely under reported cause of death. Chromium’s is important trace element to control diabetes mellitus and metabolism of carbohydrate, lipid and protein. Objective: The purpose of this study was to understand the relationship between serum chromium, with HbA1c, Total cholesterol and Triglycerides among type 2 diabetes patients among diabetic patients. Methodology: This is cross-sectional study done in Jabber Abu Ezz Centre for treatment and care of diabetics in Khartoum—Sudan. Four hundred subjects were enrolled in this study;one hundred subjects were normal healthy as control group, and three hundred subjects diabetic patient type 2 as test group;demographic and biochemical data were collected;serum chromium, Glycosylated Haemoglobin (HbA1c), Total cholesterol Triglycerides, were determined by using NYCOCARD READER II, spectrophotometer (Biosystem 310) and spectrophotometer 210-VGP. Result: In this study there is significant parameters level means of FBS HbA1c, Total Cholesterol, Triglycerides and Chromium of the test groups when compared with healthy control groups subjects (P = 0.001, 0.018, 0.01, 0.011, 0.004), respectively. Significant negative correlation is between FBS, HbA1c, Total Cholesterol, Triglycerides and Chromium (r = ?0.555, P value = 0.003), (r = ?0.668, P value = 0.002), (r = ?0.335, P value = 0.004) and (r = ?0.774, P value = 0.002) respectively. Conclusion: There was significant correlation between serum Chromium level with fasting blood sugaer, Glycosylated Haemoglobin (HbA1c), Total cholesterol and Triglycerides among type 2 diabetes patients.展开更多
To evaluate the metal chromium (Cr) contamination of soil at a chromium-containing slag site by ferrochromium production, the contaminated sites, under slag heap, in the vicinity of slag heap and arable soils near the...To evaluate the metal chromium (Cr) contamination of soil at a chromium-containing slag site by ferrochromium production, the contaminated sites, under slag heap, in the vicinity of slag heap and arable soils near the outlet of sewer channel, and unpolluted site 5 km away from one ferroalloy plant in Hunan Province, China, were selected. The concentrations of total Cr and water soluble Cr in bulk soil samples and profile depth samples were determined. The results show that the soils in the vicinity of slag heap have the highest total Cr content followed by the soils under the slag heap and near the outlet of sewer channel of the factory. The mean concentrations of total Cr in the top soils at above three contaminated locations exceed the critical level of Secondary Environmental Quality Standard for Soil in China by 3.5, 5.4 and 1.8 times. In most Cr polluted soils, total Cr has a relative accumulation in soil depth of 40-60 cm, but this trend is not found in unpolluted soils. The average concentrations of water soluble Cr (Ⅵ) in top soils under slag heap and in the vicinity of slag heap are 176.9 times and 52.7 times higher than that in the uncontaminated soils, respectively. However, water soluble Cr (Ⅵ) contents in soils near sewer channel are all low and the values are close to that in the uncontaminated soils. Although water soluble Cr (Ⅵ) content in soil profiles decreases with soil depths, it in soils under slag heap maintains a high level even at a depth of 100-150 cm. The results imply that the transportation of Cr (Ⅵ) can result in a potential risk of groundwater system in this area.展开更多
The environmental risk of chromium pollution is pronounced in soils adjacent to chromate industry. It is important to investigate the functioning of soil microorganisms in ecosystems exposed to long-term contamination...The environmental risk of chromium pollution is pronounced in soils adjacent to chromate industry. It is important to investigate the functioning of soil microorganisms in ecosystems exposed to long-term contamination by chromium. 45 soil samples obtained from different places of the slag heap in a steel alloy factory were analyzed for chromium contamination level and its effect on soil microorganisms and enzyme activities. The results show that the average concentrations of total Cr in the soil under the slag heap, adjacent to the slag heap and outside the factory exceed the threshold of Secondary Environmental Quality Standard for Soil in China by 354%, 540% and 184%, respectively, and are 15, 21 and 9 times higher than the local background value, respectively. Elevated chromium loadings result in changes in the activity of the soil microbe, as indicated by the negative correlations between soil microbial population and chromium contents. Dehydrogenase activity is greatly depressed by chromium in the soil. The results imply that dehydrogenase activity can be used as an indicator for the chromium pollution level in the area of the steel alloy factory.展开更多
目的:制备三价铬离子螯合物单克隆抗体(Cr^(3+)-EDTA m Ab),研制胶体金免疫层析试纸条(Cr-Strip)。方法:用异硫氰酯法合成Cr^(3+)-i EDTA-BSA,UV和ICP-AES进行鉴定;细胞融合技术筛选Cr^(3+)-EDTA m Ab细胞株,体内诱生腹水法制备Cr^(3+)-...目的:制备三价铬离子螯合物单克隆抗体(Cr^(3+)-EDTA m Ab),研制胶体金免疫层析试纸条(Cr-Strip)。方法:用异硫氰酯法合成Cr^(3+)-i EDTA-BSA,UV和ICP-AES进行鉴定;细胞融合技术筛选Cr^(3+)-EDTA m Ab细胞株,体内诱生腹水法制备Cr^(3+)-EDTA m Ab,并对其特性进行分析;应用Cr^(3+)-EDTA m Ab研制Cr-Strip,并测定其性能。结果:筛选出3株杂交瘤,最好的是2A11G5,Ka为2.69×109L/mol,对Cr^(3+)-EDTA的IC50为9.84μg/L,与其他重金属离子无交叉反应;Cr-Strip的检测时间为10 min,检测限为5μg/L,其检测结果与ICP-AES符合率为100%。结论:制备出了高质量的Cr^(3+)-EDTA m Ab,研制出更为灵敏的Cr-Strip。展开更多
基金This study was funded by the Canadian International Development Agency(CIDA),through the University San Simón(UMSS)–Bolivia and the University of Calgary-Canada.
文摘The Rocha River is a receptor to receive wastewater from household,hospital and industry,from where contaminants are transported in the river,affecting biodiversity and the ecosystem of the area.In this paper we estimated the maximum transport of total chromium and chloride anion by applying the analytical model of Ogata&Banks(1961),and the results obtained are grouped into three zones:Contaminated,transition,and uncontaminated.The analytical model was applied with 13 samples collected from the river piezometers installed near Rocha,where they are arranged in two lines,i.e.RH-1 to RH-6 as the first line and RH-9 to RH-12 as the second line.The total chromium concentrations range from 0.16 mg/L(RH-1)and 0.11 mg/L(RH-9)at the closest points to Rocha River,to 0.13 mg/L(RH-7)and 0.03 mg/L(RH-12)at the most remote points to the river.The advance of the pollutants does not exceed 50 meters with respect to the axis of the Rocha River.
文摘Metal debris from metal-on-metal (MoM) total hip arthroplasties (THA) has been suspected to cause periprosthetic heterotopic ossifications (HO). We determined the influence of disseminated cobalt, chromium and molybdenum on the development of HO. Native blood samples from patients with 86 high-carbon and 16 low-carbon Co28Cr6Mo articulations were analysed by high-resolution inductively coupled plasma mass-spectrometry (HR ICP-MS). The results revealed that high-carbon metal-on-metal articulations showed lower metal blood levels (Co 1.03 to 1.60 μg/l, Cr 0.77 to 0.88 μg/l, Mo 0.45 to 0.56 μg/l) whereas low-carbon articulations achieved higher metal blood levels (Co 2.59 to 6.85 μg/l, Cr 1.25 to 3.55 μg/l, Mo 0.45 to 0.64 μg/l), but no correlation between metal ion blood level or carbon content and the development of HO could be found in these MoM articulations. Hence, metal debris from MoM articulation does not stimulate heterotopic bone formation despite other well-known local reactions.
文摘Background: Diabetes mellitus is a common disease and it is a major cause of morbidity;several studies indicate that diabetes is a likely under reported cause of death. Chromium’s is important trace element to control diabetes mellitus and metabolism of carbohydrate, lipid and protein. Objective: The purpose of this study was to understand the relationship between serum chromium, with HbA1c, Total cholesterol and Triglycerides among type 2 diabetes patients among diabetic patients. Methodology: This is cross-sectional study done in Jabber Abu Ezz Centre for treatment and care of diabetics in Khartoum—Sudan. Four hundred subjects were enrolled in this study;one hundred subjects were normal healthy as control group, and three hundred subjects diabetic patient type 2 as test group;demographic and biochemical data were collected;serum chromium, Glycosylated Haemoglobin (HbA1c), Total cholesterol Triglycerides, were determined by using NYCOCARD READER II, spectrophotometer (Biosystem 310) and spectrophotometer 210-VGP. Result: In this study there is significant parameters level means of FBS HbA1c, Total Cholesterol, Triglycerides and Chromium of the test groups when compared with healthy control groups subjects (P = 0.001, 0.018, 0.01, 0.011, 0.004), respectively. Significant negative correlation is between FBS, HbA1c, Total Cholesterol, Triglycerides and Chromium (r = ?0.555, P value = 0.003), (r = ?0.668, P value = 0.002), (r = ?0.335, P value = 0.004) and (r = ?0.774, P value = 0.002) respectively. Conclusion: There was significant correlation between serum Chromium level with fasting blood sugaer, Glycosylated Haemoglobin (HbA1c), Total cholesterol and Triglycerides among type 2 diabetes patients.
基金Project(k0802144-31) supported by the Program of Science and Technology of Changsha, ChinaProjects(2006AA062374, 2007AA021304) supported by the National Hi-tech Research and Development Program of China
文摘To evaluate the metal chromium (Cr) contamination of soil at a chromium-containing slag site by ferrochromium production, the contaminated sites, under slag heap, in the vicinity of slag heap and arable soils near the outlet of sewer channel, and unpolluted site 5 km away from one ferroalloy plant in Hunan Province, China, were selected. The concentrations of total Cr and water soluble Cr in bulk soil samples and profile depth samples were determined. The results show that the soils in the vicinity of slag heap have the highest total Cr content followed by the soils under the slag heap and near the outlet of sewer channel of the factory. The mean concentrations of total Cr in the top soils at above three contaminated locations exceed the critical level of Secondary Environmental Quality Standard for Soil in China by 3.5, 5.4 and 1.8 times. In most Cr polluted soils, total Cr has a relative accumulation in soil depth of 40-60 cm, but this trend is not found in unpolluted soils. The average concentrations of water soluble Cr (Ⅵ) in top soils under slag heap and in the vicinity of slag heap are 176.9 times and 52.7 times higher than that in the uncontaminated soils, respectively. However, water soluble Cr (Ⅵ) contents in soils near sewer channel are all low and the values are close to that in the uncontaminated soils. Although water soluble Cr (Ⅵ) content in soil profiles decreases with soil depths, it in soils under slag heap maintains a high level even at a depth of 100-150 cm. The results imply that the transportation of Cr (Ⅵ) can result in a potential risk of groundwater system in this area.
基金Project(K0802144-31) supported by the Program of Science and Technology of Changsha, ChinaProjects(2006AA06Z374, 2007AA021304) supported by the National Hi-tech Research and Development Program of China
文摘The environmental risk of chromium pollution is pronounced in soils adjacent to chromate industry. It is important to investigate the functioning of soil microorganisms in ecosystems exposed to long-term contamination by chromium. 45 soil samples obtained from different places of the slag heap in a steel alloy factory were analyzed for chromium contamination level and its effect on soil microorganisms and enzyme activities. The results show that the average concentrations of total Cr in the soil under the slag heap, adjacent to the slag heap and outside the factory exceed the threshold of Secondary Environmental Quality Standard for Soil in China by 354%, 540% and 184%, respectively, and are 15, 21 and 9 times higher than the local background value, respectively. Elevated chromium loadings result in changes in the activity of the soil microbe, as indicated by the negative correlations between soil microbial population and chromium contents. Dehydrogenase activity is greatly depressed by chromium in the soil. The results imply that dehydrogenase activity can be used as an indicator for the chromium pollution level in the area of the steel alloy factory.
文摘目的:制备三价铬离子螯合物单克隆抗体(Cr^(3+)-EDTA m Ab),研制胶体金免疫层析试纸条(Cr-Strip)。方法:用异硫氰酯法合成Cr^(3+)-i EDTA-BSA,UV和ICP-AES进行鉴定;细胞融合技术筛选Cr^(3+)-EDTA m Ab细胞株,体内诱生腹水法制备Cr^(3+)-EDTA m Ab,并对其特性进行分析;应用Cr^(3+)-EDTA m Ab研制Cr-Strip,并测定其性能。结果:筛选出3株杂交瘤,最好的是2A11G5,Ka为2.69×109L/mol,对Cr^(3+)-EDTA的IC50为9.84μg/L,与其他重金属离子无交叉反应;Cr-Strip的检测时间为10 min,检测限为5μg/L,其检测结果与ICP-AES符合率为100%。结论:制备出了高质量的Cr^(3+)-EDTA m Ab,研制出更为灵敏的Cr-Strip。
