Les phosphates apatitiques et le ciment portland

Dans le présent travail, sera évoquée l'incorporation des phosphates marocains bruts et ceux ayant servi à la décoloration des eaux usées de textile (résidus), dans la fabrication du ciment. Les essais physico-chimiques ont montré une parfaite concordance avec les ciments normalisés. Néanmoins, une réactivité plus faible des apatites brutes par rapport à celle des résidus d'apatites a été notée. Ces résultats renforcent la valorisation des résidus d'apatite dans le ciment

Canine leishmaniasis due to

A seroprevalence study of canine leishmaniasis was carried out in five provinces in northern Morocco: Taounate, Al Hoceima, Zouagha Moulay Yacoub, Chefchaouen and Ouezzane. 55 localities have been concerned and a total of 1,013 dogs were screened, which represents almost 100% of the canine census. Of the screened dogs: 87 showed antibody titer ≥ 100 when tested by IFAT (seroprevalence of 8.6 %) and were distributed in 83 asymptomatics (without clinical symptoms) and four symptomatics (with one or several symptoms of leishmaniasis) with important variations according to the locality. Relative frequency of asymptomatic dogs was observed (8.2 %), and the seroprevalence increased in middle altitude (500 m < altitude < 1,000 m) and high altitude (≥ 1,000 m). Parasites isolated from dogs were identified as L.infantum MON- 1 by isoenzyme profile and Rsal digestion

Air pollution assessment of Salé's city (Morocco)

Four sites were selected in Sale's city in Morocco in order to contribute in air pollution level assessment and determination of its effects on public health. The sites were selected so that they are close to the most important industrialized areas, they have a very high demographic density and they cover a heavy traffic. Two approaches of air sampling and subsequent analysis methods of elements in atmospheric aerosols have been performed. The first is a classical approach, which consists in sampling total airborne materials with a High Volume Sampler and analysing the samples using Atomic Absorption Spectroscopy (AAS). The second is having its interest for studies relating effects of particles on human health. It consists in employing a Dichotomous Sampler to collect inhalable particles and the X-ray Fluorescence (XRF) for elemental analysis. With such system, it was possible to collect separately respirable and inhalable aerosols. The ED-XRF analysis method used is appropriate for monitoring airborne polluants in living and working areas with advantage of simple preparation, nondestructive nature, rapidity and suitable limits of detection. Using this method, it was possible to identify and quantify S, Ca, CI, Fe, Cu, and Pb. With Atomic Absorption Spectroscopy Analysis Method, we quantified Cd. This study have been completed by measuring NO$_x$ SO$_2$ and solid suspended particles or airborne particulate matter (APM)