abstract in first part of this project, the use of a new and biguanid-like catalyst supported on silica as a recyclable catalyst provides a new route for the synthesis of a variety of arylalkylidene rhodanine derivatives through knoevenagle reaction in at present of solvent at room temperature. rhodanine derivatives and especially arylalkylidene rhodanines have proven to be attractive compound...

this exploratory study aimed to investigate a possible relationship between learners’ beliefs about language learning and one of their personality traits; that is,locus of control (loc). both variables, beliefs and locus of control, are assumed to influence the language learning process. the internal control index (ici) and the beliefs about language learning inventory (balli) were administered...

Using the Web has become ubiquitous and an indispensable part of scientists’ daily life. Although there are many studies dealing with the use of the Web, few studies have focused on how different user groups including scientists make use of visible and invisible parts of the Web for educational and research purposes. This article first introduces the visible and invisible parts of the Web, and ...

 Background and Aim: The lack of paying attention to overlap between two databases cause purchase of duplicate resources waste of funds. This study examined overlap of articles in the field of cardiovascular which was indexed in Scopus and Web of science databases during years 2001 to 2010.  Materials and Methods: In this study, at first, sub-headings in cardiovascular field from medical...