To study the genetic variation of different traits, 66 isolated lines from different Iranian safflower landraces of Isfahan, Azarbaijan, Khorasan, Kordestan, Central provinces along with 13 foreign genotypes and two local populations of Kooseh and Arak-2811 were evaluated in a simple lattice design with two replications. The experiment was conducted at the research farm, Isfahan University of ...

فرض کنیمr یک حلقه تعویض پذیر ویکدار موضعی باشدو(j(r رایکال جیکوبسن r و(z(r مجموعه مقسوم علیه های صفر حلقه r باشد.گوییم r یک حلقه z- موضعی است هرگاه j(r)^2=. .همچنین برای یک حلقه تعویض پذیر r فرض کنیم c یک عنصر ناصفر از (z( r باشد با این خاصیت که cz( r)=0 گوییم حلقه موضعی r یک حلقه c - موضعی است هرگاه و{0 و z(r)^2={cو z(r)^3=0, نیز xz( r)=0 نتیجه دهد که x عضو {c,0 } است. در این پایان نامه ساخ...

In order to study the melon genotypes to broomrape,  an experiment was conducted in a randomized complete block design with three replications at Barekat research field of Jovein  in Sabzevar, east of Iran. Seeds of 14 genotypes of melon (Melon, Magasi, Khatouni, Nishabour, Tabassi, Tallebi, Jim Abad, Eyvankay, Tashkendi, Mianeh, Mianeh atashbar, Atrak, Galia kayhan, Galia hybrid) were planted ...

since the 1960s the age effects on learning both first and second language have been explored by many linguists and applied linguists (e.g lennerberg, 1967; schachter, 1996; long, 1990) and the existence of critical period for language acquisition was found to be a common ground of all these studies. in spite of some common findings, some issues about the impacts of age on acquiring a second or...

the effect of learning strategies on the speaking ability of iranian students in the context of language institutes abstract language learning strategies are of the most important factors that help language learners to learn a foreign language and how they can deal with the four language skills specifically speaking skill effectively. acknowledging the great impact of learning strategies...

the skill of reading in english as a foreign language is an important and challenging one which is affected both by linguistic and extra linguistic factors. since vocabularies are part and parcel of every reading comprehension text, knowing enough vocabulary always facilitates this process. however, guessing strategy as one of the most important strategies has consistently ignored by language l...