AJP_Vol 01. N 02

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    Integration Of Prior Information In Kaplan Meier Estimator Using Bayesian Approach
    (جامعة الوادي - University of Eloued, 2020-12-31) Pempie, Pascal; Hamimes, Ahmed; Benamirouche, Rachid
    As part of this contribution, we will illustrate the effectiveness of the Bayesian approach in estimating durations; we suggest a new definition of the Kaplan Meier Bayesian estimator based on a stochastic approximation under an informative prior. For this reason, based on the lognormal distribution, we have unconjugated a priori distributions. This method of processing makes it possible to assume that the use of the a priori data with the various suggested methods is sensitive to the choices of the parameters added.
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    Ecodendrometric Parameters Of Some Medicinal Plants In Aleppo Pine Forests Of Northern Sétif (algeria)
    (جامعة الوادي - University of Eloued, 2020-12-31) rabihat, eadaad; Bounar, Rabah; Ghadbane, Mouloud; Chermat, Sabah; Rebbas, Khellaf
    The ecodendrological study, on 35 plots were sampled in the Alep pine formation of the Ain Hamda Tizi N’bechar forest at the rate of one plot per station and in each plot a Phytoecological floristic survey was carried out. Concerning the species of the floral procession of the pine forest, there are 19 medicinal species, belonging to 13 families and 20 genera. This medicinal potential must be protected and preserved; it is in this context that this study is based on the knowledge of the factors which influence the distribution and the distribution of these species within the framework of a good rational management in support of the local and sustainable development of the local population through valuation.
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    Microbial Soft Rot Of Cultivated Fruits And Vegetables
    (جامعة الوادي - University of Eloued, 2020-12-31) saliha, bourdi; Djellout, Nadine Chahrazade; Baika, Khadidja; Bamebarek, Hafsa; Benaissa, Asmaa
    The nutritional richness of fruits and vegetables makes them an ideal target for microorganisms, causing in particular soft rot. The microorganisms responsible for this pathology are generally found in the environment, and are endowed with a very important enzymological power, the main action of their pathogenicity. These enzymes, which allow the degradation of the plant cell wall, allow them to cross the protective wall of the plant, causing a liquefaction of tissues, whose environmental conditions as well as transport and storage conditions favour the development of these phytopathogens. A better understanding of spoilage microorganisms and the characteristics of spoilage should allow the development of new conservation and protection technologies and reduce the loss of vegetables due to spoilage. This review summarizes the main literature data on soft rot, and the diversity and mode of action of the main microbial causal agents.
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    Synthesis And Biological Activity Of 2-((3-cyano-4,6-distyrylpyridin-2-yl) Thio) Acetamide And Its Cyclized Form
    (جامعة الوادي - University of Eloued, 2020-12-31) Negmari, yousef; Shaban A. A, Abdel-raheem; Adel M., Kamal El-dean; Reda, Hassanien; Mohamed E. A., El-sayed .; Aly A., Abd-ella
    In this paper, 2-((3-Cyano-4,6-distyrylpyridin-2-yl)thio)acetamide (2) and its cyclized form, 3- amino-4,6-distyrylthieno[2,3-b]pyridine-2-carboxamide (3), were prepared and their structure characterizations were performed by the means of elemental and spectroscopic analyses. Their biological activity as insecticides against cowpea aphid Aphis craccivora Koch using acetamiprid insecticide as a reference was studied. The bioassay results for compounds (2) and (3) against nymphs of cowpea aphid showed that the LC50 values were 0.192 and 0.841 ppm, respectively, after 24 h of treatment but the LC50 values were 0.041 and 0.095 ppm, respectively, after 48 h of treatment. Furthermore, the bioassay results for compounds (2) and (3) showed that the LC50 values were 1.233 and 2.949 ppm, respectively, after 24 h of treatment and the LC50 values were 0.142 and 0.270 ppm, respectively, after 48 h of treatment against adults of cowpea aphid. Given these observations, it has been found that there is a remarkable relationship between the biological activity and the structure of the used compounds.
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    Biological Control By Plant Growth Promoting Rhizobacteria
    (جامعة الوادي - University of Eloued, 2020-12-31) ben arbia, radia; Bestami Merdia . Ben Malek, Rokaia; Fellan, Kheira; Benaissa, Asmaa
    Plant Growth Promoter Rhizobacteria (PGPR) is soil bacteria that can live on, in or around plant tissue and promote plant growth by many mechanisms that include a biological control of plant pathogens. Indeed, PGPRs have a protective effect through several modes of action such as antagonism, competition, production of hydrolytic enzymes and biofilm formation. Moreover, the use of PGPRs as biocontrol agents is very harmonious with the environment and therefore represents a good alternative to the use of chemicals in agriculture. This review is presented as a general bibliographical synthesis on the different aspects of PGPRs and their biocontrol potential.
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    Level And Health Risk Evaluation Of Heavy Metals And Microorganisms In Urban Soils Of Lagos, Southwest Nigeria
    (جامعة الوادي - University of Eloued, 2020-12-31) Moustafa, Boufadina; Tajudeen, O. Yahaya; Esther, O. Oladele; Benjamin, Chibs; Abdulmalik, Abdulazeez; Kelechi, Nnochiri; Akinola, O. Stephen; Hikmat, Ahmed; Angela, Daniel
    Heavy metal and microbial pollution of the environment are linked to the increasing prevalence of diseases worldwide. Accordingly, this study assessed the safety of urban soils in Lagos, Nigeria, with regard to the levels of lead (Pb), nickel (Ni), cadmium (Cd), copper (Cu), chromium (Cr), zinc (Zn), and microorganisms. Soil samples were collected from Iwaya, Makoko, and Ilaje areas of the city and subjected to atomic absorption spectroscopy (AAS) and microbiological examinations using standard protocols. The mean values obtained for the heavy metals and microorganisms were compared with the World Health Organization (WHO) permissible limits. The average daily oral ingestion (ADOI), average daily dermal ingestion (ADDI), and the hazard quotient (HQ) of the heavy metals were also calculated. The AAS indicated that the soils in the three areas contained non-permissible levels of the evaluated heavy metals, except Cu and Cd. The microbiological examinations also showed that the soils contained abnormal levels of heterotrophic bacteria (HB), hydrocarbon utilizing bacteria (HUB), heterotrophic fungi (HF), and hydrocarbon utilizing fungi (HUF). The ADOI of the heavy metals in the three areas were above the recommended levels, while ADDI were normal. Moreover, the HQ of oral ingestion of each heavy metal except Cr was greater than one, while the HQ of dermal ingestion of the heavy metals was less than one. These findings suggest that the soils could predispose the residents in the areas to diseases. Thus, there is a need for regular environmental sanitation and environmental pollution control in the areas, and personal hygiene.
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    Phytochemical Study, Nutritive Value, Antioxidant And Anti-inflammatory Activities Of Phenolic Extracts From Desert Plant Calligonum Comosum L'hér.
    (جامعة الوادي - University of Eloued, 2020-12-31) Saleha, Awadi; Chouikh, Atef; Chemsa, Ahmed Elkhalifa; Aounallah, Chahira; Aounallah, Imane; Alia, Fatma
    The aim of this study is to the estimation of the nutritive values, phytochemical study and the antioxidant and anti-inflammatory activities of ethyl acetate, tannins and crudes extracts from the aerial part of Calligonum comosum L’Hér. Which grow in South East of Algeria. According to the results obtained from the estimation of nutritive value, the plant is rich in proteins and lipids and very poor in carbohydrates. The results also showed a difference in the content of polyphenols and flavonoids. The crude extracts were high in polyphenols content in the ethanol extract 170.74±5.8 mg EAG/g Extract, and the best value of flavonoids in methanol extract 28.22±0.25 mg QE/g Extract. Chromatographic analysis by HPLC of methanolic extract has identified four phenolic compounds out of 38 peaks as: Gallic acid, Chlorogenic acid, Caffeic acid and Vanillic acid. The antioxidant activity was evaluated by three tests, the results of the DPPH• test, showed that methanol extract had the best scavenging than the other extracts (IC50: 2.09±0.02 μg/ml), But, in the hemolysis test, the values of the percentage of hemolysis were approximately the same at concentration 1 mg/ml between the extracts and standard used. In the reducing power test, its results showed that the tannins extract had the highest reducing power 79.17±5.22 μg/ml at Abs700nm=0.5. As for anti-inflammatory activity, the methanol and flavonoids phase ethyl acetate extracts showed the best inhibitory effect against protein denaturation compared to other extracts. The effects were estimated 3.14mg E Diclofenac/mg Extract.