The drinking water of Nouakchott,the capital of Mauritania,comes from the Senegal River.The current water treatment is done with aluminum sulfate.In order to monitor the aluminum content,from September 2015 to August ...The drinking water of Nouakchott,the capital of Mauritania,comes from the Senegal River.The current water treatment is done with aluminum sulfate.In order to monitor the aluminum content,from September 2015 to August 2016,three samples were taken monthly for each water source:pretreated water(from Beni Naji treatment station),treated water(from PK17 treatment station)and the water tower.The analysis results of the aluminum content of the treated water(full treatment)and pretreated water(first treatment)showed that the aluminum content of all samples was between 0.03 mg/L and 0.09 mg/L,with an average value of 0.07 mg/L.The World Health Organization stipulates that the normal content of aluminum between 0.1 mg/L and 0.2 mg/l.In the course of the study,the changes of aluminum content in samples from different places were observed.This change can be explained by coagulation-flocculation of aluminum sulfate.The aluminum content of the samples met the World Health Organization standards for drinking water.展开更多
The advent of technology in the world has led to enormous, varying economic and social changes. Those changes have influenced the climate balance, which leads to global temperature rise, hence oceanic expansion and me...The advent of technology in the world has led to enormous, varying economic and social changes. Those changes have influenced the climate balance, which leads to global temperature rise, hence oceanic expansion and melting glaciers. These various phenomena caused the variation in the mean sea level. Thus, in this study we have evaluated that variation from the instrumental recordings of the tide gauges available in the region, which led us to choose the tide gauges of Dakar (Senegal), Nouakchott (Mauritania) and Palmeira (Cape Verde). The analysis of the tidal series began with the test of presence or absence of significant trends in the series using the Man-Kendall method followed by the decomposition of these series using the SSA, ARIMA and SLT techniques, which would result in the trend, seasonality and residues. The results of this analysis show a variation of 1.52 mm/year, 4.51 mm/year and 20.08 mm/year respectively for the Dakar, Palmeira and Nouakchott tide gauges.展开更多
Thyroid heterotopia is an abnormal localization of normal thyroid tissue coexisting with a normal organ and of normal localization. It is distinguished from ectopic thyroid and thyroid cancer metastasis. Lingual or su...Thyroid heterotopia is an abnormal localization of normal thyroid tissue coexisting with a normal organ and of normal localization. It is distinguished from ectopic thyroid and thyroid cancer metastasis. Lingual or sublingual thyroid is defined as the presence of thyroid tissue in the midline at the base of the tongue anywhere between the circumvallate papillae and the epiglottis. The prevalence of lingual thyroid is 1 in 100,000, and it is more common in women, with a female to male ratio ranging from 3:1 to 7:1. Embryologically, the thyroid originates at the foramen cecum, which is located at the junction of the anterior two thirds with the posterior one-third of the tongue, report a case of a goiter on a heterotopic basilingual thyroid tissue causing dysphagia in a 58-year-old woman operated in the ENT department of the CHN in Nouakchott, Mauritania, the thyroid origin of the mass was confirmed by histology.展开更多
文摘The drinking water of Nouakchott,the capital of Mauritania,comes from the Senegal River.The current water treatment is done with aluminum sulfate.In order to monitor the aluminum content,from September 2015 to August 2016,three samples were taken monthly for each water source:pretreated water(from Beni Naji treatment station),treated water(from PK17 treatment station)and the water tower.The analysis results of the aluminum content of the treated water(full treatment)and pretreated water(first treatment)showed that the aluminum content of all samples was between 0.03 mg/L and 0.09 mg/L,with an average value of 0.07 mg/L.The World Health Organization stipulates that the normal content of aluminum between 0.1 mg/L and 0.2 mg/l.In the course of the study,the changes of aluminum content in samples from different places were observed.This change can be explained by coagulation-flocculation of aluminum sulfate.The aluminum content of the samples met the World Health Organization standards for drinking water.
文摘The advent of technology in the world has led to enormous, varying economic and social changes. Those changes have influenced the climate balance, which leads to global temperature rise, hence oceanic expansion and melting glaciers. These various phenomena caused the variation in the mean sea level. Thus, in this study we have evaluated that variation from the instrumental recordings of the tide gauges available in the region, which led us to choose the tide gauges of Dakar (Senegal), Nouakchott (Mauritania) and Palmeira (Cape Verde). The analysis of the tidal series began with the test of presence or absence of significant trends in the series using the Man-Kendall method followed by the decomposition of these series using the SSA, ARIMA and SLT techniques, which would result in the trend, seasonality and residues. The results of this analysis show a variation of 1.52 mm/year, 4.51 mm/year and 20.08 mm/year respectively for the Dakar, Palmeira and Nouakchott tide gauges.
文摘Thyroid heterotopia is an abnormal localization of normal thyroid tissue coexisting with a normal organ and of normal localization. It is distinguished from ectopic thyroid and thyroid cancer metastasis. Lingual or sublingual thyroid is defined as the presence of thyroid tissue in the midline at the base of the tongue anywhere between the circumvallate papillae and the epiglottis. The prevalence of lingual thyroid is 1 in 100,000, and it is more common in women, with a female to male ratio ranging from 3:1 to 7:1. Embryologically, the thyroid originates at the foramen cecum, which is located at the junction of the anterior two thirds with the posterior one-third of the tongue, report a case of a goiter on a heterotopic basilingual thyroid tissue causing dysphagia in a 58-year-old woman operated in the ENT department of the CHN in Nouakchott, Mauritania, the thyroid origin of the mass was confirmed by histology.
