17 research outputs found
Les phosphates apatitiques et le ciment portland
Dans le présent travail, sera évoquée
l'incorporation des phosphates marocains bruts et ceux ayant servi Ă
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 SO and solid suspended particles or airborne particulate matter (APM)