Hyoscyamus reticulatus is an important medicinal plant belonging to Solanaceae family. This herb has antispasmodic, antichlorogenic and analgesic characteristics due to tropane alkaloids such as hyoscyamine and scopolamine. Mechanical vibration is one of abiotic stresses which could affect on growth and development of plant cells. In this research, effect of high-frequency mechanical vibration ...

abstract this study evaluates the iranian pre-university english textbook in terms of needs, objectives, content, and methodology. the study was designed on the qualitative- quantitative survey basis using interviews and questionnaires, a researcher-made textbook evaluation checklist and a needs analysis questionnaire. the textbook evaluation questionnaire was used in this study to elicit the ...