AJET_Vol 01 N 01

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    Identification, purification and quantification of Toxins “Ochratoxin A” in Algerian grape juice
    (University of El-Oued, 2019-12-28) Mazrou ., Soraya; Messaoudi, Mohammed; Begaa ., Samir; Akretche, Djamal Eddine
    This study aimed to investigation the mycotoxin of Ochratoxin A (OTA) which can contaminate grape in mediterranean basin. Its toxicity was subject of many animal studies and carcinogenic characters are well established today. So the European Committee has fixed the maximum in grape 2μg/L. Most methods used for mycologic identification is based mainly on the morphological characters. It was identified after its purification by the technique of culture monospore on the culture medias Potatoes Agar and Czapek Yeast extract Agar. The detection and quantification of this mycotoxin by uses combined techniques: immunoafinity for the purification and the HPLC coupled with the fluorometric detector. This chromatographic system allowed us to estimate the contamination of Ochratoxin in the grape which is lower than 30 ng/L. The concentration of conidia at Aspergillus section Nigri was estimated at 3×106conidia/mL. The value obtained is less than 30 ng / L and is lower than that fixed by the EC. So, we confirm that our sample does not present serious risks to the human health. We have also confirmed fungus belonging to A. Niger specie, which normally does not produce OTA.
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    An overview on desiccant assisted evaporative cooling in hot and humid climates
    (University of El-Oued, 2019-12-28) Jani Dilip, Batukray
    In last few decades due to global warming the temperature of the earth increases continuously day by day responsible for the increased energy demand for cooling the building space. Vapor compression based conventionally used traditional air conditioners consume tremendous energy for cooling the building. So, it is time to search for cooling system which maintains necessary thermal comfort at optimum energy use. Desiccant assisted evaporative cooling system having greater potential for use of renewable solar energy as well as effectiveness in terms of maintaining comfort in hot and humid climate. In the present paper, solid desiccant based evaporative cooling systems are reviewed and it is shown that desiccant assisted evaporative cooling perform better and displayed comparatively lower energy consumption as compared to the traditional air conditioning systems.
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    Study of corrosion inhibition of Aluminum in nitric acid solution using Anisaldehyde (4-methoxy benzaldehyde) as inhibitor
    (University of El-Oued, 2019-12-28) Husaini*, Husaini; Usmana, , Bishir; Ibrahima, , Muhammad Bashir
    The inhibitive action of Anisaldehyde (4–methoxy benzaldehyde) on corrosion of Aluminum in nitric acid solution was studied through weight loss method. Fourier Transform Infrared Spectroscopic Analysis (FTIR) was used to characterize the inhibitor and the corrosion product. The effect of different inhibitor concentrations was studied at 308, 313 and 318 K. The present study showed that the percentage of inhibition efficiency (% I.E.) is enhanced with increase of inhibitor concentration and decrease with rising in temperature. Maximum I.E. of Anisaldehyde was found 86.32 % at 308 K and 0.1M inhibitor concentration in 1.4M HNO3 solution. The inhibitive action of the inhibitor is discussed in view of adsorption of Anisaldehyde molecule on the metal surface. It was found that the adsorption of the inhibitor on the metal surface follows Langmuir adsorption isotherm. Activation parameters governing the adsorption process were evaluated and discussed in detai
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    Broken rotor bars fault detection in induction motors using FFT: simulation and experimentally study
    (University of El-Oued, 2019-12-28) Kechida, Ridha; Menacerb, Menacerb; Cherifa, Hakima
    This paper presents the fault detection of broken rotor bars based on the analysis technique, such as the fast Fourier transform (FFT), which utilize the steady-state spectral components of the stator quantities is considered. This technique has been given expected results, the accuracy of this technique depends on the loading conditions and constant speed of the motor. This method shows good theoretical and experimental results
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    Effect of rice straw ash on soil properties and yield of cucumber
    (University of El-Oued, 2019-12-28) Muazu Dantala, Zakari; Babangida, Ibrahim; Nasid, Nuraddeen Mukhtar; Jafar Shanonoa, Nura; Muntaqqa, Ibrahim; Tijjani, Usman; Abubakar, Ahmad
    Many farmers in Nigeria are paying close attention to using Rice Straw Ash (RSA) as a soil fertility enhancement additive. The short and long-term effects of applying this ash to the soil quality were not adequately investigated, however. This research was conducted at the Departmental Farm of Agricultural and Environmental Engineering, Bayero University, Kano to access the impact of RSA on the soil’s physiochemical properties and on cucumber yield. Twelve (12) experimental plots were treated with different amounts of RSA (0 Kg, 1 Kg, 2 Kg and 3 Kg) to assess the intensity effect of the treatment on both soil physiochemicals and crop yield. For each experimental plot, soil properties (moisture content, porosity, bulk density, electrical conductivity, organic matter, pH and sodium concentration, nitrogen, phosphorus, potassium, calcium and magnesium) were measured and analyzed before and after the experiment. The results showed that the application of ash increased moisture content, bulk density, porosity, electrical conductivity, organic matter and sodium concentration while reducing the pH, nitrogen, phosphorus, potassium, calcium and magnesium levels. The mean yield in 0 Kg RSA (21,84tons / ha) was found to be the highest. There was a drop in the yield (13.08-14.14tons / ha) of crop in the plots treated with RSA. The research concluded that continued use of RSA could lead to a reduction in crop yield as the EC level was found to be rising. It is on this basis that farmers are advised to avoid the use of RSA as an additive for soil fertility enhancement and other means should therefore be used.