[Air pollution by lead emitted from vehichles in the Dakar region]. / Etude de la pollution atmosphérique par le plomb émis par les véhicules dans la région de Dakar.

The use of super carburant involves a lot of lead particles by the vehicles. This type of pollution specially affects the urban populations and the environment. This phenomenon is emphasized in the big cities like Dakar where more than 60% of the national car park move. This study shows that the trees can be used as indicator of lead pollution level. Unfortunately, the estimation of the pollution level isn't always easy whereas numerous factors can play a role in the mechanism. In this study, we have shown that the atmospheric pollution of Dakar by the muffler gases is a real fact.

[Artificial depigmentation practice of the skin in women of Dakar and analytical study of the cosmetic products used]. / Pratique de la depigmentation artificielle de la peau chez les femmes a Dakar et etude analytique des produits dits cosmetiques utilises.

This survey which involved 6 salesman and 159 women, allowed us to carry out a study on the different cosmetic products used by women in Dakar to artificially bleach their skin. An analytical study has been conducted on those skin bleaching products through colorimetric identifications of hydroquinone, corticoids and mercurial derivates and the dosage of hydroquinone by High Performance Liquid Chromatography (HPLC). It was established that those products were essentially corticoids and hydroquinone based products and could induce serious dermatological troubles to users. This phenomenon, known in Wolof "xessal", and motivated by various factors, is facilitated by easy access to skin bleaching products available in the town market places. It affects an important part of the female population of all ages (educated, illiterate, married and single). In view of the importance of the phenomenon, emergency actions must be taken to eradicate it.

[ Dietary intake of fluorine through of tea prepared by the traditional method in Senegal]. / L'apport de fluor dans l'alimentation par le thé préparé selon la méthode traditionnelle au Sénégal.

The consumption of tea in Senegal is known and called "trois normaux". The use of Thea sinensis as drink many times per day with a lot of sugar, may cause some public health problems. In the aim to face that situation, we have analysed the fluor level in the available tea samples in the senegalese market in respect of the ways of the preparation. The fluor level has been analysed by ionometric specific electrode. The concentrations were from 3.8 to 6.1 mg/l in the infusion and from 11.1 mg/l in the decoction. These results showed that the tea plant contain a high concentration of fluoride. In addition, the level of fluoride may be higher, when the water drink itself is rich in fluoride.

[Drug prescription in Dakar and outskirts]. / La prescription médicale à Dakar et banlieue.

Drugs are very important to human life due to their human mission and to the essential role they play in modern society through their real social function. When used in certain conditions, drugs are expensive, ineffective and can even become dangerous and the source of poisoning with serious consequences. In order to minimize risks and accidents, special attention is paid to drugs from their conception to their elimination by the body, resulting inter alia in a severe control of their prescription. In Dakar, where are can find the greatest number of prescribers in Senegal, this control is rarely respected. This situation can be fraught with serious consequences for the health of populations.

[Surveillance of heavy metal pollution of mangrove oysters in Senegal]. / Surveillance de la pollution par les métaux lourds des huîtres de palétuviers du Sénégal.

Joal-Fadiouth, located in department of Mbour (region of Thies), 118 kilometers from Dakar, the capital of Senegal, is an area where one can find a large swamp with mangroves whose self-propagating roots serve as growth support for young oysters. The importance of those oysters, both on the domestic and foreign markets and the ever greater threat of pollution of our coasts led us to search for and measure out heavy metals. In fact, it is well know that the accumulation of those elements in the food chain can be at the origin of severe poisoning. It appears, in the light of the results obtained that the level of pollution by heavy metals in this part of the senegalese coast has not yet reached alarming limits.