Youssef SALAMA | Faculté Polydisciplinair Khouribga (original) (raw)

Papers by Youssef SALAMA

Global journal of ecology, Mar 2, 2024

Several chemical substances are released into the environment, and many of them accumulate in the... more Several chemical substances are released into the environment, and many of them accumulate in the silt or sludge constituting sediments, at the bottom of rivers and lakes as well as in estuaries and seabeds. The ecological and health damage caused by the contamination of sediments by these chemical substances can have serious consequences on ecosystems by reducing the diversity of communities, particularly invertebrates, with indirect consequences on fi sh populations, loss of edibility of fi sh or shellfi sh, recreational uses affected or impossible, ecological risk assessment can be used prospectively or retrospectively. The general outline of the evaluation includes three stages: the formulation of the problem, which aims to develop an analysis plan and defi ne the means to be implemented to characterize the risk, the analysis itself, where we collect the data necessary for the assessment of effects and exposure, and risk characterization, where the risk(s) and, as far as possible, the associated uncertainties are estimated. The application of this approach to dredged materials is proposed in the form of two successive stages: the fi rst consists of a simplifi ed risk analysis, from which we can decide to initiate a second stage of detailed evaluation. The review evaluates the ecological risk associated with the disposal of dredged materials in freshwater environments. It examines the impact of dredged materials on biodiversity and ecosystem health, focusing on assessing the extent of ecological damage, identifying infl uential factors, and proposing mitigation strategies.

Journal of civil engineering and environmental sciences, Mar 2, 2024

In Morocco, like in many developing countries, the management of solid waste, especially househol... more In Morocco, like in many developing countries, the management of solid waste, especially household solid waste, is a major concern. It is estimated that each person generates an average of 0.67 kilograms of urban waste per day, while in rural areas, this fi gure is 0.3 kilograms per day. The collection of urban solid waste is regular and almost daily, reaching approximately 5.5 million metric tons per year. The management of household waste is a major concern for all urban communities. The city of Khouribga, like many other Moroccan cities, faces various environmental challenges such as air pollution, waste management, and preservation of natural resources. In order to address these issues, it is essential to gather accurate and comprehensive information to develop effective and sustainable strategies. In this context, efforts are being made to optimize and improve the collection of household solid waste in the urban municipality of Khouribga. This study has revealed the existence of technical and social constraints that hinder the smooth operation of the current solid waste collection in this city. Therefore, the mobilization of the municipality, service providers, and the population is necessary to overcome these challenges.

Annals of environmental science and toxicology, Mar 2, 2024

Over the last 30 years, the study of biomarkers has experienced signifi cant growth. Biomarkers s... more Over the last 30 years, the study of biomarkers has experienced signifi cant growth. Biomarkers serve as essential tools in monitoring toxicology and risk assessment of environmental pollutants by providing early and specifi c endpoints. This expansion in the fi eld has enabled researchers to better understand the impact of various environmental pollutants on living organisms and ecosystems. By utilizing biomarkers, scientists can assess the potential risks posed by these pollutants and develop effective strategies for environmental protection and preservation. This article briefl y reviews some of the aspects in an attempt to give an overall view of the fi eld. Some of the new developments, particularly in relation to biomarkers of exposure and response, are mentioned.

Journal of Civil Engineering and Environmental Sciences, 2024

Global Journal of Ecology, 2024

Annals of Environmental Science and Toxicology, 2024

Journal of Materials and Environmental Science, 2024

Honey has a rich history as a healing agent and a beloved food. It is produced by honey bees from... more Honey has a rich history as a healing agent and a beloved food. It is produced by honey bees from the nectar and secretions of plants, serving as their primary food source. Additionally, honey is utilized to nourish bees during the winter season. Throughout the ages, the consumption of honey has served dual purposes - as a delectable sustenance and as a natural remedy. Esteemed by healers of diverse ancient civilizations, this golden nectar has long been recommended as a treatment for a myriad of maladies. Dating back to antiquity, honey has been revered for its remarkable ability to expedite the mending of wounds, a virtue repeatedly substantiated through compelling evidence. Honey, with its illustrious past as a potent remedy and a cherished culinary delight, holds a place of great significance. Crafted meticulously by diligent honey bees, this golden elixir emerges from the nectar and secretions of plants, acting as their vital sustenance. Moreover, honey is employed to nourish bees during the winter season. Across the centuries, the consumption of honey has served two-fold objectives - as a delightful sustenance and as an organic remedy. Revered by healers hailing from various ancient civilizations, this precious liquid gold has been hailed as a cure for a wide range of ailments. Tracing its roots in ancient times, honey has been highly regarded for its extraordinary power to accelerate the healing of wounds, a virtue consistently supported by compelling evidence.

Blood Cancer Journal, 2022

Patients with large granular lymphocytic leukemia (LGLL) frequently present with neutropenia. Whe... more Patients with large granular lymphocytic leukemia (LGLL) frequently present with neutropenia. When present, anemia is usually accompanied by neutropenia and/or thrombocytopenia and isolated anemia is uncommon. We evaluated a cohort of 244 LGLL patients spanning 15 years and herein report the clinicopathologic features of 34 (14%) with isolated anemia. The patients with isolated anemia showed a significantly male predominance (p = 0.001), a lower level of hemoglobulin (p < 0.0001) and higher MCV (p = 0.017) and were less likely to have rheumatoid arthritis (p = 0.023) compared to the remaining 210 patients. Of the 34 LGLL patients with isolated anemia, 13 (38%) presented with pure red cell aplasia (PRCA), markedly decreased reticulocyte count and erythroid precursors, and more transfusion-dependence when compared to non-PRCA patients. There was no other significant clinicopathologic difference between PRCA and non-PRCA patients. 32 patients were followed for a median duration of 5...

SN Applied Sciences, 2021

The Moroccan marine environment is threatened by several types of pollution. Indeed, the littoral... more The Moroccan marine environment is threatened by several types of pollution. Indeed, the littoral zone knew an urban, industrial and agricultural development without precedent; moreover, coastal waters have served as discharges for almost all activities linked to this development. The aim of this study is to determine the biological, physicochemical and bacteriological quality of waters and bivalve shells in the Bouregreg estuary. Sampling was carried out at four stations (S1, S2, S3 and S4) located downstream to upstream of the estuary. Thus, we analysed the degree of contamination by total coliform, faecal coliform and faecal streptococci in the water and in the flesh of Mytilus galloprovincialis and Cardium edule and determined the physicochemical parameters of seawater samples, which included temperature, dissolved oxygen, electrical conductivity, pH, total hardness, biological oxygen demand for five days (BOD5), complete alkalimetric title, NO2−, NO3−, NH4+, Fe2+, K+, SO42−, HC...

The wastewater treatment and reuse plant of the city of Khouribga (WWTP) carry out a biological t... more The wastewater treatment and reuse plant of the city of Khouribga (WWTP) carry out a biological treatment of urban waste water in the city. The activated sludge treatment process is the process adopted at the Khouribga WWTP. This treatment is carried out at two aeration basins. Although the purifying performance of the WWTP and the reliability of this process are proven, several types of biological dysfunctions of the aeration basins can appear. The results of the biological treatment obtained showed that the elimination yield of the physicochemical parameters was 92; 98.4; 96.5 and 97.1 respectively for COD, BOD<sub>5</sub>, TSS and turbidity. Generally, the main dysfunction noted in the aeration basin of the WWTP is the proliferation of filamentous bacteria associated with poor settling. This swelling problem leads to poor settling of the mud following an increase in the volume occupied by it. Significant filamentary development severely limits the hydraulic capacity o...

African Journal of Biotechnology, 2016

Eighteen Erlenmeyer flask containing six different support media [pozzolan, polyvinyl chloride1 (... more Eighteen Erlenmeyer flask containing six different support media [pozzolan, polyvinyl chloride1 (PVC1), polyvinyl chloride2 (PVC2), foam, polyethylene terephthalate (PET) and polystyrene (PS)] were subject to identical volumetric organic loadings and hydraulic retention time in treating synthetic protein ± carbohydrate waste. The objective was to examine the influence of support media on performance of anaerobic denitrification and retention and their resulting impact on system performance and failure. According to the results relative to every control support media, it was noticed that the best support media were the ones in PVC1 and PVC2, with successive reduction rates of 68.33 and 61.93% for chemical oxygen demand (COD), and 55 and 49% for nitrate. On the other hand, in two submerged anaerobic biofilter reactor packed with the support media of PVC1 and PVC2, the reactor with PVC1 media exhibited 89.93% COD and 78.75% nitrate removal efficiency attributable to its higher producti...

All too often biology courses over-emphasize trivial and easy-to-test activities that ask student... more All too often biology courses over-emphasize trivial and easy-to-test activities that ask students only to recall, recognize, describe, or "compare and contrast" information that has been memorized. I have observed this weakness on the exams of major universities. Alfred Whitehead noted that "So far as the mere imparting of information is concerned, no university has had any justification for existence since the popularization of printing in the fifteenth century." This is no less true today with the availability of the Internet. The introductory course should incorporate a diversity of learning outcomes, and this diversity should be reflected both in classroom activities and in student assessment protocols. The proposal will also make a case for the urgent development of an online student-centered learning environment, including possible activities that would be included in the course. A combination of multiple teaching approaches is necessary for changing stude...

European Scientific Journal, 2016

This work is in the context of the management and recycling of solid urban waste. The evolution o... more This work is in the context of the management and recycling of solid urban waste. The evolution of the physicochemical and microbiological parameters during composting pilot scale household waste was studied. The maturity of the processes and the agronomic value of the finished product were examined. The results showed that the organic fraction of solid waste could be composted successfully in 60 days and revealing a vigorous microbial activity. The final compost has been satisfactory for its agricultural application. Phytotoxicity tests conducted on wheat and tomato crops, show that the incorporation of 25% culture support the compost allows a germination rate of up to 85% against 70% for the control for the variety of corn. In the case of tomatoes, we recorded a germination rate of about 67% against 58% for the control.

Le bassin versant du Bou Regreg est l’un des premiers réseaux hydrologiques du Maroc ; il a une s... more Le bassin versant du Bou Regreg est l’un des premiers réseaux hydrologiques du Maroc ; il a une superficie de l’ordre de 9700 km2 et est composé de quatre cours d’eau qui drainent respectivement les superficies 4000 km2 (Oued Bou Regreg), 3600 km2 (Oued Grou), 1900 km2 (Oued Krifla) et 150 km2 (Oued Akrech). En effet, dans ce travail, nous avons étudié la qualité physico-chimique et bactériologique des eaux collectées au niveau de six stations (S4, S6, S2, S5 et S1) du fleuve BouRegreg depuis le barrage de Sidi Mohammed Ben Abdallah jusqu'à l’estuaire. Les paramètres physicochimiques étudiés sont : la température, le pH, la conductivité électrique, la DBO5 et les métaux lourds (L’arsenic, cobalt, Plomb, Zinc, Cuivre, Nickel, Cadmium, Chrome). Pour les paramètres bactériologiques nous avons étudié la présence ou l’absence des coliformes et des streptocoques fécaux ainsi que les germes pathogènes (Salmonelles, Staphylococcus aureus et Pseudomonas aeruginosa). Les résultats obtenus...