let r be a commutative ring with non-zero identity and m be a unital r-module. then the concept of quasi-secondary submodules of m is introduced and some results concerning this class of submodules is obtained

background: genomic dna was isolated from parabronema skrjabini . rrna region was amplified and sequenced. methods : the rna secondary structure was predicted using mfold software (http://mfold.rit.albany.edu). the secondary structure with bulge, hairpins, helices, interior, external and multi loops was predicted for 5.8srdna of our sequence of p. skrjabini and a sequence of p. skrjabini and tw...

Deficiences imunitaire acquises Les , deficits nnmumtaires pathologiques af­ systeme des phagocytes, l'immunite a mechation_ cellulare :t la synthese des im­ Illfnoglobulmes so1t separement, soit con­Jom temen t. La manifestation .clinique de ces deficits est la ,frequence _des mfections bacterielles, vir­ales et mycotiques.  Le triteJent s deficits immunitaire a part la therap1e antnnfectieu...

this article emphasizes the findings of a survey conducted to find out the views of students on the environmental education (ee) in iranian secondary school (ss) curriculum. a total of six hundred students from forty secondary schools, randomly selected ss from five zones in tehran city responded to the questionnaire. two research questions were asked while two hypotheses were tested in this st...