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...

abstract recent studies suggest that prelistening activities play an important role in the development of listening comprehension (e.g. long 1990;chiang and dunkel 1992; schmidt-rinehart 1994; jensen and hansen 1995; robinson et al., 1995; buck, 1995; foster and skehan,1996; teng 1996; robinson, 2001; chang and read 2006). in line with previous studies and to shed light on a new aspect of sche...

Observation of ethical principles by health care organizations managers can direct and control human resources. Moreover, organizational commitment is a type of emotional and fanatical dependence on the values and goals of an organization that can help preparing an appropriate background for employee development. Therefore, this research is aimed to determine the relationship between management...

abstract nowadays, industries cannot play a crucial role in national and international competitions. the tourism industry is no exception. tourism industry development as the most important economic sector and income generation is one of the key challenges of economic development in the world. therefore, countries were successful that take advantage of the capabilities of tourism sector using ...

Background:The duty of physicians in new world is to promote health, prevent diseases and deliver primary health care. Hence there is need for physicians who are able and skilled according to the needs of society. The goal of this study is to determine the needs of general physicians working in rural health centers of Esfahan province in five health domains. Methods: In this descriptive-surv...

Introduction: The development and implementation of effective safety educational program for minimizing hazards in a farm, is the most important activity that can be done to improve safety level there. This program, however, requires to needs assessment process. So, the present study was designed to analyze of the educational needs of farmers in the field of agricultural occupational health. M...

in this thesis, we exploit a simple and suitable method for immobilization of copper(ii) complex of 4?-phenyl-terpyridine on activated multi-walled carbon nanotubes [amwcnts-o-cu(ii)-phtpy]. this nanostructure was characterized by various physico-chemical techniques. to ensure the efficiency and fidelity of copper species, the implementation of three-component strategies in click-chemistry all...