Samir Medjekal

ORCID: 0000-0002-9019-4579
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Research Areas
  • Ruminant Nutrition and Digestive Physiology
  • Nuts composition and effects
  • Reproductive Physiology in Livestock
  • Enzyme Production and Characterization
  • Botany and Plant Ecology Studies
  • Mycorrhizal Fungi and Plant Interactions
  • Agroforestry and silvopastoral systems
  • Plant-Microbe Interactions and Immunity
  • Entomopathogenic Microorganisms in Pest Control
  • Plant Micronutrient Interactions and Effects
  • Psidium guajava Extracts and Applications
  • Probiotics and Fermented Foods
  • Potato Plant Research
  • Rabbits: Nutrition, Reproduction, Health
  • Studies on Chitinases and Chitosanases
  • Insect Pest Control Strategies
  • Natural product bioactivities and synthesis
  • Date Palm Research Studies
  • Dengue and Mosquito Control Research
  • Polysaccharides Composition and Applications
  • Edible Oils Quality and Analysis
  • Phytase and its Applications
  • African Botany and Ecology Studies
  • Agriculture and Biological Studies
  • Cassava research and cyanide

Université de M'Sila
2016-2024

University Frères Mentouri Constantine 1
2015-2016

Centaurea parviflora (C. parviflora), belonging to the family Asteraceae, is an Algerian medicinal plant used in folk medicine treat different diseases related hyperglycemic and inflammatory disorders, as well food. The present study aimed assess total phenolic content, vitro antioxidant antimicrobial activity phytochemical profile of extracts C. parviflora. extraction compounds from aerial parts was conducted using solvents increasing polarity starting methanol, resulting crude extract...

10.3390/molecules28052263 article EN cc-by Molecules 2023-02-28

Effects of three selected medicinal plants on fermentation patterns and to evaluate their potential as antimethanogenic additives in ruminant feeds were studied. Nigella sativa, Rosmarinus officinalis Zingiber officinale, which added the substrate a dry powder, ruminal fermentation, fibre digestion methane production, studied vitro batch cultures mixed rumen microorganisms. Serum bottles containing 500 mg (a mixture alfalfa hay, 400 grass hay 100 barley grain per gram), 50 plant tested ml...

10.1016/j.egypro.2017.07.089 article EN Energy Procedia 2017-07-01

The objective of the study was to determine in vitro rumen fermentation end-products 10 browse species. Serum bottles containing 500 mg substrate, ml sheep fluid and 40 buffered medium were incubated for 24 h. After incubation, pH, methane volatile fatty acid (VFA) productions recorded. There differences among feedstuffs (p < .05) pH VFA production. Astragalus gombo resulted highest Stipa tenacissima lowest Gas production Medicago sativa S. tenacissima. Methane (ml/g DM incubated) varied...

10.1080/09712119.2016.1257432 article EN cc-by Journal of Applied Animal Research 2016-11-18

Fusarium wilt of date palm (Phoenix dactylifera L.) caused by oxysporum f.sp. Albedinis is one the most destructive diseases in North Africa spicily Algeria and Morocco. The objectives this work were isolation, identification biocontrol efficacies testing rhizospheric actinobacteria medicinal plant Astragalus gombo against fusarium disease palm. Five Streptomyces spp. Isolates bi02, bi21, bi24, bi26 bi28 showed largest zone inhibition demonstrating a potent effect F. broad spectrum...

10.25081/jsa.2017.v1.46 article EN cc-by Journal of Scientific Agriculture 2017-06-12

This research highlights the efficiency of a bioinsecticide based on Streptomyces griseoflavus PAL114 in controlling black bean aphids and its effect fava beans. Three actinobacterial strains were tested vitro for their aphicidal activity. The strain was then formulated talc powder again. Formulation processes performed with four spore suspension densities (102, 104, 106 108 ml−1) at rate 25 ml per 100 g powder. Furthermore, vivo plants studied pot experiments using two application methods:...

10.1080/09583157.2024.2373477 article EN Biocontrol Science and Technology 2024-07-03

The main objective of the present study was to investigate a strategy bioconverte spineless cactus Opuntia Ficus-Indica (O. ficus indica) Cladodes, Medicago sativa L. (M. sativa) and barley straw (H. vulgare) based on their chemical composition, in vitro digestibility fermentation parameters. CP ranged from 51.41 156.09 g/kg DM, which especially high within M. low H. vulgare. O. indica had highest values free condensed tannins. most digestible plant sample that O.ficus indica. maximum gas...

10.1080/09064702.2023.2191603 article EN Acta Agriculturae Scandinavica Section A – Animal Science 2023-03-27

<title>Abstract</title> This research highlights the efficiency of a new bioinsecticide based on<italic>Streptomyces griseoflavus</italic>PAL114 for black bean aphid control and its effect on fava beans. Three actinobacterial strains were tested<italic>in vitro</italic>for their aphicidal activity. The PAL114 strain was then formulated in talc powder at two densities (≈ 10<sup>6</sup>and ≈ 10<sup>8</sup>spore ml<sup>− 1</sup>) tested again. Furthermore, applied to plant modes pot experiments...

10.21203/rs.3.rs-3713970/v1 preprint EN cc-by Research Square (Research Square) 2023-12-11

Date palm (Phoenix dactylifera L.) of Boussaâda has varietal diversity and a very important nutritional value in Algeria. Nevertheless, today the groves are threatened, not only climatically but also terms such as disappearance varieties, low production even discharges serving mainly to vegetative propagation which can be used source explants on vitro somatic embryogenesis technique. The aim this study is use culture techniques regenerate phoenicicultural orchards at oasis. Two types...

10.56027/joasd.spiss122022 article EN cc-by-sa JOURNAL OF OASIS AGRICULTURE AND SUSTAINABLE DEVELOPMENT 2022-06-16

New Algerian Gram-positive, rod-shaped, endospore-forming, salt-philic bacteria (DZ28 strain) that overproduce extracellular alkaline proteases have been isolated from salt lake deposits in Lake Oubeira, El Taref. Strain DZ28 was assigned as Halobacillus salinus on the basis of phenotypic properties and 16S rDNA gene sequencing (ripotyping). The maximum protease activity registered after 36 hours incubation optimized medium at 30 ° C 19,000 U / ml a shaking bottle culture 160 rpm. crude...

10.31015/jaefs.2023.1.10 article EN International Journal of Agriculture Environment and Food Sciences 2023-02-18

The main objective of the present study was to evaluate volatile fatty acids (VFAs) and methane (CH4) production cactus Opuntia Ficus-Indica (O. ficus indica) Cladodes, Medicago sativa L. (M. sativa) barley straw (H. vulgare) using chemical composition in vitro gas production. There were significant (p&lt;0.05) differences among studied samples all measured nutrients except dry matter (DM) value. O. indica showed particularly highest Ash content (284.07 g/kg DM). crude protein (CP) feedstuff...

10.71336/jabs.1076 article EN Journal of Applied Biological Sciences 2023-01-29

The nutritive value of some Algerian perennial plants species were examined on the premise their in vitro gas production, chemical composition and fermentation kinetics.The plant Aristida pungens, Artemesia herbaalba, vulgarus, Atriplex halimus, Genista saharae, Lygeum spartum, Retama retam, Stipa tenacissima.L oat hay as a standard.Importants variation have been registered (P <0.05) regarding all components species.The crude protein (CP) content ranged between 5.02 16.15 (% DM), highest CP...

10.36899/japs.2023.4.0693 article EN cc-by The Journal of Animal and Plant Sciences 2023-04-15

A total of 33 lactic acid bacteria (LAB) were isolated from 5 samples traditional dairy product (Jben) collected various livestock farms in Oued El Malha, Djelfa, the Ouled Naïl Range north-central Algeria. The taxonomic study strain B04 using a multiphase approach based on morphology, physiology, molecular (16S rRNA) and phylogenetic analyses allowed correlating this to Enterococcaceae. difference 16S rRNA gene sequence isolate toward most closely related genus Enterococcus was more than 6...

10.36547/nbc.904 article EN cc-by Nova Biotechnologica et Chimica 2022-07-15
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