Nadia Hidar

Cadi Ayyad University | UCAM · Department of Chemistry

The Moroccan picholine tree’s leaves contain phenolic compounds that benefit human health. However, the amount and type of these compounds can vary based on factors such as the extraction method and conditions. This study aimed to improve phenolic compounds’ extraction while minimising harmful chemicals’ use. It has been found that using ethanol as...

Stevia is known as a valuable spice plant. Freeze drying and gamma irradiation processing have been valuably used for microbial decontamination. In this study, the influence of freeze drying and gamma irradiation at the doses of 0.5, 1 and 2 kGy on the extraction yield, total polyphenol content, DPPH radical scavenging activity, and antimicrobial a...

As a result of the growing demand for low-calorie sweeteners, interest in stevia plant has increased. Two methods are applied for the preservation of stevia leaves: freeze drying and gamma irradiation at 1 kGy. Because most studies have focused on sorption characteristics of plants, the present work aims to evaluate the effect of these two technolo...

The need for construction sand needs to increase due to the increase in population. The use of dunes and coastal sand disfigures shorelines and the consequences are alarming. It is therefore necessary to consider replacing these resources with other more ecological ones. Hence, it is the purpose of this article. In this paper, we study the correct...

The need for construction sand needs to increase due to the increase in population. The use of dunes and coastal sand disfigures shorelines and the consequences are alarming. It is therefore necessary to consider replacing these resources with other more ecological ones. Hence the purpose of this article. In this paper, we study the correct formula...

Green construction, also called sustainable construction or green construction, offers various possibilities in order to reduce the ecological impact of buildings. The use of factory waste in construction is a means of recovering this waste and also a method of protecting the environment, more precisely against the harmful effects on flora and faun...

Background and Aim: The leaves of Jujube Zizyphus lotus are widely used as medicine for their health benefits, particularly in China, America and the Middle East. To determine the benefits of Jujube leaves, the leaves were analysed to distinguish certain chemical compounds, examine their antioxidant activity and study their structural morphology....

Because of the repeated passage of trains, anomalies are created inside the rails in the form of cracks of different shapes and position. These are due essentially to the wheel – rail contact. They present a hazard causing at the final stage rail failure, train derailment and accidents. Detecting track anomalies has become a major issue for the ent...

Argania spinosa L. Skeels is an emblematic tree in Morocco, known worldwide for its medicinal and nutritional value. Its fruits contain kernels used to prepare an edible oil, the leaves are used to feed livestock, and its wood is used as fuel. If the oil acquires high importance, the other components of the fruit of the argan are undervalued. Our o...

Rebaudioside A is one of the major sweet components found in stevia. The great importance of rebaudioside A in the sweeteners market requires that its physicochemical and microbiological qualities are studied. Therefore, this work aimed to evaluate the microbiological and physical-chemical parameters of commercial rebaudioside A. Its moisture and a...

The effect of freeze-drying and gamma irradiation at 0.5, 1, and 2 kGy on the physicochemical composition (moisture, fat, ash, mineral, and chlorophyll contents), microstructure, total phenolic content, and antioxidant capacity of stevia leaves was investigated in the present study. The results obtained indicated that freeze-drying and gamma irradi...

Absract Morocco has started promoting the use of biomass to replace fractions of industrial materials. One of the main constituents of biomass is polysaccharides. Cellulose is the main constituent of the cell wall of the plant, representing about 50% of the biomass. The cactus is one of the plants rich in cellulose and polysaccharides, this plant i...

Stevia is a natural non-caloric substitute to conventional sugar. The objective of this study was to investigate the effect of solar convective drying on kinetics and quality attributes of stevia leaves grown in Morocco. The evaluated drying temperatures were 50, 60, 70 and 80 °C with an air flow of 300 and 150 m³/h. Effective moisture diffusivity...

Stevia rebaudiana is a natural non-caloric substitute to conventional sugar. Moisture adsorption isotherms of stevia powder, a sweet plant, were investigated at three different temperatures (30, 40 and 50 °C) using a gravimetric technique. The sorption isotherms were found to be typical type II sigmoid with the sorption capacity decreasing with inc...

This study presents the convectional drying process of two types of Moroccan sweet cherry, namely, Burlat and Van. 40 g of cherries were taken, pitted, cut in two halves, and were dried using a partially indirect solar convective dryer, which has an area of 2.5 m². The thin-layer drying of sweet cherry were carried out in July 2017 at three air tem...

The purpose of our study is to verify the usefulness of gamma irradiation treatment at low doses (0.25, 0.5 and 1 kGy) combined to vacuum packaging on commercial teas of Thymus satureioides deliberately contaminated with Escherichia coli. The efficiency and the influence of the process on contamination level and the shelf life of the product were s...

The cellulosic waste is the most abundant material in the earth. It is considered as a renewable polymer of wood cell walls and plant cells. It is used in different fields mainly as sustainable potential precursors and it is useful for the preparing activated carbon. The purpose of this study is the valorisation and production of activated carbon f...

Water contained in foods allows the proliferation of microorganisms and the development of chemical reactions that deteriorate the product. This experimental study is focused on the influence of drying parameters on water loss of fresh rosemary leaves. It presents the experimental study results of the drying kinetics. The drying kinetics of rosemar...

Textile industry is among the highly polluting industries in water effluent. It consumes large quantities of water and chemicals compounds. These releases can have varying characteristics regarding their volumes and pollutants concentrations. Therefore, adverse effects can be observed as consequence on environment and biodiversity. According to the...

The solar drying for preservation of food products is the most attractive and promising application. It leads to reduce the water activity in the product and thereby prolongs its shelf life by decreasing the microbial contamination. Thymus satureioides, a medicinal and aromatic plant, was conserved using a nondestructive innovative preservation pro...

In this paper, we studied and compared water sorption isotherms of irradiated and non-irradiated (controlled) rosemary leaves at three temperatures: 30, 40 and 50 °C, using the standard static gravimetric method. This method consists on the use of different salts solutions, over a range of water activity from 0.05 to 0.9.The sorption isotherms of a...