Plateforme d'Enseignement à Distance de l'Université Oran 1 Ahmed Ben Bella

Chapitre 4: Etude des circuits monophasés en régime sinusoïdal. (Partie 1)

Suite du chapitre 3: Analyse des circuits électriques par les principaux théorèmes.

• Méthode des tensions de nœuds.
• Exercices d'application.

Exploring natural and uncharrted ecosystems can yield novel biocontrol agent with potentiel benefits in both pharmaceuticals and agriculture. Micoorganisms, being economically sustainable and biologically valuable, are a valuable source for the production of biocontrol compounds. The objective of this study is to assess the bioactive capabilities, specifically the antimicrobial and antioxidant properties, of Streptomyces sp.T002, wich were isolated for the first time, from the Tifrit forest in western Algeria.

This study involved collecting 42 oil samples from Tifrit forest located in Western Algeria to evaluate their potential for producing bioactive substances. The T002 isolate, wich demonstrate the highest level of bioactivity, was identified using various techniques such as morphological, physiological, biochemical, and molecular characterization. The bioactivy of the metabolites produced by this isolate was then assessed through in vitro evaluation. Finally, the crude extract was analyzed using liquid chromatography and mass spectrometry (LC-MS)

The potent antimicrobial activity and significant antioxidant scavenging proprieties of the ethyl acetate extract of T002were evident. The HPLC-MS analysis identified Blanchaquinone, a major compound in the extract, wich may be responsible for its antimicrobial and antioxidant proprieties. The taxonomic position of T002 was determinates to be similar to Stresptomyces galilaus through the analysis of its 16SrRNA sequence.

The strain T002 seems to hold great potential for producing new molecules that could be useful in the field of medicine.

Principaux théorèmes: Millman, Thévenin, Norton

Suite Chapitre 3
Analyse des circuits électriques par les principaux théorèmes

Chapitre 3
Analyse des circuits électriques par les principaux théorèmes

Fiche de TD 1.

Lois de Kirchhoff

Chapitre 2: 

Lois de Kirchhoff en courant continue

Chapitre 1: Notions de base sur les circuits électriques

Surgical management of unresectable perihilar cholangiocarcinoma is no longer relevant, often these patients benefit from less invasive endoscopic or radiological management, but in the event of failure of these techniques, and in selected patients, cholangiojejunostomy in segment 3 can be an effective option.We describe the case of a 48‐year‐old patient presenting an unresectable perihilar cholangiocarcinoma, palliative endoscopic management failed twice, and an open segment 3 intrahepatic cholangio‐jejunostomy was performed, the patient was discharged on the 7th day, has a complete resolution of jaundice at 1 month and is alive at 6 months without any readmission.