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...

Background and purpose: Adherence to the principles of professional ethics in medical groups, in addition to influence patient satisfaction, plays a key role in improving and restoring their health. The aim of this study was to evaluate professional ethics from the perspective of recipients and service providers in hospitals affiliated with Mazandaran University of Medical Sciences. Materials ...

Development and assessment of measurement tools are important stages in the research processes regarding social, educational, and medical sciences, which mainly focus on the measurement of characteristics, qualitative variables, and abstract variables. Validity and reliability are two important components of researcher-made tools. The quality of assessment and confirming of validity and reliabi...

abstract the present study was conducted to investigate the effect of using model essays on the development of writing proficiency of iranian pre-intermediate efl learners. to fulfill the purpose of the study, 55 pre- intermediate learners of parsa language institute were chosen by means of administering proficiency test. based on the results of the pretest, two matched groups, one as the expe...

     Entrepreneurship as the capacity of exploring and exploitation of profitable opportunities is the center of gravity of the work and development in the present era. This study sought to answer the question of why, when, and how some people recognize and exploit opportunities, while others do not have this ability. Accordingly, this survey study was conducted to study the effects of emotiona...