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| 1 | Evaluation of mercury methylation in fresh and pre dried sediments using ^(203)Hg radioisotope显示文摘Mercury methylation rates in fresh and pre dried river sediments were determined in sediment water systems spiked with 203 HgCl 2 at a level of 0.75—0.95 ppm as Hg. At the end of the incubation period (21—38 days), methylmercury production in the fresh sediments was in the order of 3.0% to 13.75%, whereas in the pre dried sediments the methylation was much lower, at 0.6% to 3.9%. The highest methylation levels were generally recorded in the uppermost, 1 cm layer of the sediment column. Total mercury concentration in water in equilibrium with the 203 Hg spiked fresh sediments was in the range of 44.7 to 634 ng/L, whereas in equilibrium with the pre dried sediments the concentration was in the range of 19.5 to 34.5 ng/L. The proportion of methylmercury to total mercury in the water varied from 9.4% to 66.6% over the fresh sediments, and from 7.1% to 10.8% over the pre dried sediments. In the system consisting of water, sediment and sediment inverterbrates the concentrations of methylmercury were 8.61 to 15.69 ng/g in the sediment, 0.011 ng/ml in the water, and 9.22 to 40.69 ng/g in the inverterbrates. Methylmercury bioaccumualtion factors (BAFs) were in the order of 274 to 8087 relative to the water, and 0.25 to 7.31 relative to the sediment. These results provide further evidence for the tendency of methylmercury to accumulate in high concentrations in aquatic organisms, even at very low total mercury concentration in water. | J.R.Ikingura 1, H.Akagi 2, J.R.D.Guimaraes 3 (1. University of Dar es Salaam, P.O.Box 35052, Dar es Salaam, Tanzania 2. Nat. Inst. for Minamata Disease, 4058 Hama, Minamata, 867 Kumamoto, Japan 3. Lab. de Radioisotopos, Universidade Federal Do Rio | 2000 | Journal of Environmental Sciences2000，12，S1： | 2 |
| 2 | Telehealth improves diabe-tes self management in an underserved community : diabetes talecare显示文摘 | Davis RM Hitch AD Salaam MM | 2010 | Diabetes Care2010，33，8： | 1 |
| 3 | Tdehealth improves diabetes selfmanagement in an underserved community: diabetes tale care 显示文摘 | Davis RM Hitch AD Salaam MM | 2010 | Diabetes Care2010，33，8： | 1 |
| 4 | TeleHealth Im- proves Diabetes Self- management in an Underserved Com- munity: diabetes TeleCare 显示文摘 | Davis RM Hitch AD Salaam MM | 2010 | Diabetes Care2010，33，8： | 1 |
| 5 | In vitro degradation behavior of biodegradable 4-star micelles 显示文摘 | Salaam La T E Derrick D B Bray T L | 2006 | Polymer2006，47，1： | 1 |
| 6 | Untreated Trichotillomania and Trichophagia: Surgical Emergency in a Teenage Girl显示文摘 | Karriem Salaam Joel Carr Harsh Grewal Ellen Sholevar David Baron | 2005 | Psychosomatics2005，，4： | 1 |
| 7 | TeleHealth im-proves diabetes self-management in an underserved com-munity: diabetes TeleCare 显示文摘 | Davis RM Hitch AD Salaam MM | 2010 | Diabetes Care2010，33，8： | 1 |
| 8 | In vitro degradation behavior of biodegradable 4-star micelles 显示文摘 | La Tisha E Salaam Derrick Dean Terry L Bray | 2006 | Polymer2006，47，： | 1 |
| 9 | Power quality detection and classification using wavelet-multiresolution signal decomposition显示文摘 | Gaouda A M Salaam M M A Sultan M R | 1999 | IEEE Trans on Power Delivery1999，14，4： | 1 |
| 10 | In vitro degradation behavior of biodegradable 4-star mieelles 显示文摘 | Salaam L T E Dean D Bray T L | 2006 | Polymer2006，47，1： | 1 |
| 11 | Tele Heath im-proves diabetes self- management in an underserved com- munity : diabetes tele care 显示文摘 | Davis RM Hitch AD Salaam MM | 2010 | Diabetes Care2010，33，8： | 1 |
| 12 | Two-stage versus onestage is there really a controversy显示文摘 | Gather DA Salama H Salaam MA | 2001 | J Periodontol2001，72，： | 1 |
| 13 | Telehealth improves dia-betes selfmanagement in an underserved community:diabe-tes tele care显示文摘 | Davis RM Hitch AD Salaam MM | | 0，，08： | 1 |
| 14 | Teleheahh improves diabetes self- management in an underserved community:diabetes tele care显示文摘 | Davis RM Hitch AD Salaam MM | 2010 | Dia- betes Care2010，33，8： | 1 |
| 15 | Thermal decomposition of KCl O4 catalyzed by Mn O2–Cu O mixed oxides systems显示文摘 | EL–AWAD A M SAID A A ABD EL–SALAAM M M | 1988 | Thermochim Acta1988，126，： | 1 |
| 16 | In vitro degradation behavior of biodegradable 4-star micelles显示文摘 | Salaam L E Dean D Bray T L | 2006 | Polymer2006，47，： | 1 |
| 17 | In vitro degradation behavior of biodegradable 4-star micelles 显示文摘 | LaTisha E Salaam Derrick Dean Terry L Bray | 2006 | Polymer2006，47，1： | 1 |
| 18 | Tele Health improves diabetes self- management in an underserved community: diabetes tele care 显示文摘 | Davis RM Hitch AD Salaam MM | 2010 | Diabetes Care2010，33，8： | 1 |
| 19 | TeleHealth improves diabetes self-management in an underserved community:diabetes TeleCare显示文摘 | Davis RM Hitch AD Salaam MM | | 0，，08： | 1 |
| 20 | Abdominal pregnancy as a cause of hemoperitoneum 显示文摘 | Shaft SM Malla MA Salaam PA | 2009 | J Emerg Trauma Shock2009，2，3： | 1 |
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