A short review is given for the determination of gross alpha activity ill urine;detailed information is collected including urine mineralization,separation of alpha emitters and source preparation.
In order to assess public effective dose due to gross alpha and beta in water, 43 tap water samples were collected from different areas in the District of Abidjan. Using the low background Gas-less Automatic Alpha/Bet...In order to assess public effective dose due to gross alpha and beta in water, 43 tap water samples were collected from different areas in the District of Abidjan. Using the low background Gas-less Automatic Alpha/Beta counting system (Canberra iMatic<sup>TM</sup>) for analysis, the gross alpha and beta concentrations found varied from 0.001 ± 0.002 to 0.063 ± 0.050 Bq/l with an average of 0.013 ± 0.012 Bq/l and from 0.067 ± 0.080 to 0.320 ± 0.120 Bq/l with an average of 0.174 ± 0.076 Bq/l, respectively in samples. The public effective dose assessment showed values of dose to ingestion of alpha and beta emitter radionuclides lower than the recommended value of dose for drinking water 0.1 mSv/y, except in 30% of the samples. These results show the need for additional studies to be conducted in order to clarify the hazardousness of these water samples. However, this study still remains important because it has provided necessary data for future tap water quality monitoring studies in the District of Abidjan.展开更多
Drinking good quality water is essential for better health. It is therefore essential to assess the radiological quality of all water consumed in the District of Abidjan in order to prevent related hazards. Thus, the ...Drinking good quality water is essential for better health. It is therefore essential to assess the radiological quality of all water consumed in the District of Abidjan in order to prevent related hazards. Thus, the objective of this study was to assess the risk of cancer due to the ingestion of alpha and beta emitting radionuclides in the different types of water consumed in the region. A total of 63 water samples with 43 tap water samples, 5 bottled mineral water and 15 sachet water samples was collected and taken to GAEC laboratory for analysis. The low background Gas-less Automatic Alpha/Beta counting system (Canberra iMatic<sup>TM</sup>) was used to determine alpha and beta activity concentrations. Activity concentrations of both gross alpha and gross beta obtained in water sample were respectively lower than the WHO recommended limits of 0.1 Bq/l and 1 Bq/l. Also, the annual effective dose and total equivalent effective dose found in mineral bottled water samples were higher than in other types of water. The assessment of radiological lifetime risk has shown values of cancer risk due to ingestion alpha and beta emitters lower than recommended limit. These results indicate that there is no health hazard associated to consumption of water in the District of Abidjan.展开更多
The gross alpha (α) and beta (β) activities and trace heavy elemental concentrations have been determined in Single Super Phosphate (SSP) and Nitrogen Phosphorous Potassium (NPK) fertilizers samples used for agricul...The gross alpha (α) and beta (β) activities and trace heavy elemental concentrations have been determined in Single Super Phosphate (SSP) and Nitrogen Phosphorous Potassium (NPK) fertilizers samples used for agricultural purposes in Nigeria. Cultivated farm soil samples from two regions (north and south) in the country and samples of phosphate rocks were also analyzed for gross α and β radioactivity and elemental concentrations. The beta activity concentration in the NPK (15-15-15) fertilizers was found to vary from 2410.0 ± 80.0 Bq·kg–1 to 4560 ± 140.0 Bq·kg–1, between 1340.0 ± 70.0 Bq·kg–1 and 1440.0 ± 70.0 Bq·kg–1 in the Single Super phosphate fertilizers while in the farm soil it ranged between 360.0 ± 40.0 Bq·kg–1 to 570.0 ± 50.0 for the north samples and 200.0 ± 50.0 to 230.0 ± 20 Bq·kg–1 for the south samples. The alpha activities in the NPK fertilizers was found to vary from 20.0 ± 10.0 to 90.0 ± 20.0 Bq·kg–1, in the SSP it varied from 60.0 ± 20.0 to 100.0 ± 20.0 Bq·kg–1 while in the soil samples it varied from 8.0 ± 6.0 to 40.0 ± 10.0展开更多
目的:观察石菖蒲配合针刺疗法对脑瘫患儿的康复治疗作用。方法:石菖蒲联合针刺治疗组(52例),治疗组采用内服煎汤提取液和头针、体针,对照组(52例)单纯用针刺治疗,观察评估患儿的发育商(developmental quotient,DQ),头颅CT检测,采用粗大...目的:观察石菖蒲配合针刺疗法对脑瘫患儿的康复治疗作用。方法:石菖蒲联合针刺治疗组(52例),治疗组采用内服煎汤提取液和头针、体针,对照组(52例)单纯用针刺治疗,观察评估患儿的发育商(developmental quotient,DQ),头颅CT检测,采用粗大运动功能测试量表(gross motor function measure,GMFM)评分,采用酶联免疫吸附法测定肿瘤坏死因子-α(TNF-α)的含量。结果:治疗后,治疗组脑血液动力学指标显著改善(P<0.05)。治疗组CT结果显示恢复率较显著增高(P<0.05)。治疗组治疗后DQ显著提高(P<0.05),治疗组GMFM评估总分显著提高(P<0.05)。联合治疗组血清TNF-α水平显著降低(P<0.05)。结论:石菖蒲发挥其通关复苏、益智健脑的功效,能够加强针刺治疗的效果,通过降低炎症反应和肿瘤坏死因子-α(TNF-α)的表达,减缓脑瘫带来的脑损伤,改善肌张力和肌力,对脑瘫患儿起到较好的康复治疗作用。展开更多
文摘A short review is given for the determination of gross alpha activity ill urine;detailed information is collected including urine mineralization,separation of alpha emitters and source preparation.
文摘In order to assess public effective dose due to gross alpha and beta in water, 43 tap water samples were collected from different areas in the District of Abidjan. Using the low background Gas-less Automatic Alpha/Beta counting system (Canberra iMatic<sup>TM</sup>) for analysis, the gross alpha and beta concentrations found varied from 0.001 ± 0.002 to 0.063 ± 0.050 Bq/l with an average of 0.013 ± 0.012 Bq/l and from 0.067 ± 0.080 to 0.320 ± 0.120 Bq/l with an average of 0.174 ± 0.076 Bq/l, respectively in samples. The public effective dose assessment showed values of dose to ingestion of alpha and beta emitter radionuclides lower than the recommended value of dose for drinking water 0.1 mSv/y, except in 30% of the samples. These results show the need for additional studies to be conducted in order to clarify the hazardousness of these water samples. However, this study still remains important because it has provided necessary data for future tap water quality monitoring studies in the District of Abidjan.
文摘Drinking good quality water is essential for better health. It is therefore essential to assess the radiological quality of all water consumed in the District of Abidjan in order to prevent related hazards. Thus, the objective of this study was to assess the risk of cancer due to the ingestion of alpha and beta emitting radionuclides in the different types of water consumed in the region. A total of 63 water samples with 43 tap water samples, 5 bottled mineral water and 15 sachet water samples was collected and taken to GAEC laboratory for analysis. The low background Gas-less Automatic Alpha/Beta counting system (Canberra iMatic<sup>TM</sup>) was used to determine alpha and beta activity concentrations. Activity concentrations of both gross alpha and gross beta obtained in water sample were respectively lower than the WHO recommended limits of 0.1 Bq/l and 1 Bq/l. Also, the annual effective dose and total equivalent effective dose found in mineral bottled water samples were higher than in other types of water. The assessment of radiological lifetime risk has shown values of cancer risk due to ingestion alpha and beta emitters lower than recommended limit. These results indicate that there is no health hazard associated to consumption of water in the District of Abidjan.
文摘The gross alpha (α) and beta (β) activities and trace heavy elemental concentrations have been determined in Single Super Phosphate (SSP) and Nitrogen Phosphorous Potassium (NPK) fertilizers samples used for agricultural purposes in Nigeria. Cultivated farm soil samples from two regions (north and south) in the country and samples of phosphate rocks were also analyzed for gross α and β radioactivity and elemental concentrations. The beta activity concentration in the NPK (15-15-15) fertilizers was found to vary from 2410.0 ± 80.0 Bq·kg–1 to 4560 ± 140.0 Bq·kg–1, between 1340.0 ± 70.0 Bq·kg–1 and 1440.0 ± 70.0 Bq·kg–1 in the Single Super phosphate fertilizers while in the farm soil it ranged between 360.0 ± 40.0 Bq·kg–1 to 570.0 ± 50.0 for the north samples and 200.0 ± 50.0 to 230.0 ± 20 Bq·kg–1 for the south samples. The alpha activities in the NPK fertilizers was found to vary from 20.0 ± 10.0 to 90.0 ± 20.0 Bq·kg–1, in the SSP it varied from 60.0 ± 20.0 to 100.0 ± 20.0 Bq·kg–1 while in the soil samples it varied from 8.0 ± 6.0 to 40.0 ± 10.0
文摘目的:观察石菖蒲配合针刺疗法对脑瘫患儿的康复治疗作用。方法:石菖蒲联合针刺治疗组(52例),治疗组采用内服煎汤提取液和头针、体针,对照组(52例)单纯用针刺治疗,观察评估患儿的发育商(developmental quotient,DQ),头颅CT检测,采用粗大运动功能测试量表(gross motor function measure,GMFM)评分,采用酶联免疫吸附法测定肿瘤坏死因子-α(TNF-α)的含量。结果:治疗后,治疗组脑血液动力学指标显著改善(P<0.05)。治疗组CT结果显示恢复率较显著增高(P<0.05)。治疗组治疗后DQ显著提高(P<0.05),治疗组GMFM评估总分显著提高(P<0.05)。联合治疗组血清TNF-α水平显著降低(P<0.05)。结论:石菖蒲发挥其通关复苏、益智健脑的功效,能够加强针刺治疗的效果,通过降低炎症反应和肿瘤坏死因子-α(TNF-α)的表达,减缓脑瘫带来的脑损伤,改善肌张力和肌力,对脑瘫患儿起到较好的康复治疗作用。
