in this work, a novel and fast method for direct analysis of volatile compounds (davc) of medicinal plants has been developed by holding a filament from different parts of a plant in the gc injection port. the extraction and analysis of volatile components of a small amount of plant were carried out in one-step without any sample preparation. after optimization of temperature, extraction time a...

As valuable historical documents, works of art can dramatically contribute to historical research. History of carpet-weaving is vague in some periods and should be clarified by the help of the surviving documents and manuscripts. Ibn Hessam's Khavaran-nameh contains illustrations depicting carpets. The present paper seeks to analyze and extract information from the carpet illustrations in Khava...

in the present study, the effect of e-64 at different concentrations (0.5, 1, 5 and 10 µm) added to (1) the ivm medium on oocyte nuclear maturation and developmental competence of ovine oocytes, and (2) to the ivc medium on embryonic development of ovine embryos were investigated.

Introduction: The Transparency is a basic principle in Iranian architecture that has reached prosperity during the time. Isfahan is an important city in architecture because it has been as the political capital in the two important periods. So many valuable buildings have been built in these periods that the houses are more important between them.   Literature review: The architecture was m...

the speech act of disagreement has been one of the speech acts that has received the least attention in the field of pragmatics. this study investigates the ways power relations, social distance, formality of the context, gender, and language proficiency (for efl learners) influence disagreement and politeness strategies. the participants of the study were 200 male and female native persian s...

Culture and human life has always been influenced by natural and human factors. Bow and arrow as a weapon, has always had a major role in this process. This tool is not only intended for hunting, which is one of the ways human subsistence economy, But also as a means of defense and military an important role in the political system of societies. Prices in archery, beyond history, which goes bac...

abstract this study aimed at investigating the impact of etymology strategy instruction on the development of vocabulary of iranian intermediate efl learners. etymology, knowledge of origin of words, roots, and affixes, has proved to be a controversial issue and a question of long debate with regard to its impact on the process of vocabulary learning. this study employed etymology strategy in ...

abstract this paper discusses several commonly used models for strategic marketing¹ including market environmental analysis methods (i.e. swot and pest analysis) and strategic marketing tools and techniques (i.e. boston matrix and shell directional policy matrix)and shows how these models may help a firm to achieve its strategic goals. at first, the main reason for doing this research is de...