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...

‏‎the hypothesis is that recent and frequent exposure to lexical items leads to a more fluent production of speech in terms of rate of speech. to test the hypothesis,a one-way anova experimental design was carried out. 24 sednior students of efl participated in a one-way interview test. data analyses revealed that those who were exposed frequently to the lexical items over a week prior to inter...

Background & Aims: Uncertainty is a state in which the knowledge of a person or persons is limited and full knowledge of the state or result that has been achieved or is not possible. Macroeconomic uncertainties create an uncertain environment for investors and make it impossible for investors to make decisions about future investments more efficiently and with more confidence, and they may suf...

Present paper seeks by empirical measurement to study concepts of youth’s available capitals (economic, social, and cultural capitals) and occupational identity, relationship of these concepts and their constituents with the youth’s occupational identity. In this research, Marsia theory is used in order to provide a theoretical framework for measuring the concept of occupational identity. For m...

supervisors play an undeniable role in training teachers, before starting their professional experience by preparing them, at the initial years of their teaching by checking their work within the proper framework, and later on during their teaching by assessing their progress. but surprisingly, exploring their attributes, professional demands, and qualifications has remained a neglected theme i...

in this thesis, structural, electronical, and optical properties of inverse pervskite(ca3pbo) in cubic phase have been investigated.the calculation have been done based on density functional theory and according to generalized gradiant approximate (gga) as correlating potential. in order to calculate the configurations, implementing in the wien2k code have been used from 2013 version. first of ...