abrin known as ribosome inactivating protein’s (rip) it is a high cytotoxic plant protein. high lethality and low cost and easy access to plant and seeds lead to this toxin used in crimes and terrorist acts. because obtaining purified toxins requires advanced laboratory equipment and complex procedures, so, it appears that the perpetrators of such crimes use crude extracts. as a result, remaini...

background: splicing by overlap extension (soe) pcr is used to create mutation in the coding sequence of an enzyme in order to study the role of specific residues in protein’s structure and function.objectives: we introduced a nested-soe-pcr (n –soe-pcr) in order to increase the specificity and generating mutations in a gene by soe-pcr.  materials and methods: genomic dna from bacillus thermoca...

bacterial vaginosis or non-specific vaginitis describes the disease caused by a change in the normal flora of the vagina, which leads to the elimination of lactobacilli, generating hydrogen peroxide and excess growth of bacteria, particularly anaerobic bacteria. this disease is the most prevalent infection of the female genital tract, and the rate of frequency of anaerobic bacteria, specificall...

The real-time polymerase chain reaction (RT-PCR), also called quantitative real-time polymerase chain reaction (QRT-PCR) or kinetic polymerase chain reaction (kPCR), is a technique used to simultaneously quantify and amplify a DNA molecule. It is used to determine whether a specific DNA sequence is present in the sample; and if it is present, the number of copies in the sample. It is the real-t...

Cet article décrit la réalisation et mise en oeuvre du thermocycleur d’une puce PCR (Polymerase Chain Reaction) par des étudiants ingénieurs de niveau M1/M2 à ESIEE Paris. Les réalisent salle blanche un prototype PCR. Ils mettent une électronique commande pour assurer les cycles chauffage/refroidissement nécessaire duplication brins d’ADN. Le procédé micro-fabrication puces inclut deux étapes p...