the purpose of this research was to investigate the attitude of vegetable growers towards sources of soil pollution in ray county. the study consisted of all vegetable growers (n=700) in ray county, located in tehran province, from which 70 vegetable growers were selected through random sampling technique. a planned questionnaire was used as the main instrument to collect data. the content vali...

the purpose of this article is to test whether the stock price index of the tehran stock exchange is located in the efficeent set of portfolios or not. in this paper the mehtod introduced by elton, gruber and padberg was used to determine the efficiency of the tse stock price index. the results showed that the tse index is not located in the efficient set.

organizational citizenship behavior is defined as completely voluntary behaviors which staffs conducted them beyond their vocation and task expectations and organizational justice is served as how to deal with staff so that they can feel fair action including understanding of justice in payments and equality in organizational procedures and intra-personal behaviors in organization. the principl...

Purpose: This paper aims to investigate the contextual conditions of creativity based on Oldham Model among the librarians of public libraries of Fars province. Design/methodology/approach: The research uses a survey method. The study population was librarians of public libraries in Fars province. The data collection instrument was questionnaire. For data analysis, univariate T test and covaria...

Background and Aims: Bovine viral diarrhea virus (BVDV) is considered as worldwide and economically significant infection. The aim of this study was to estimate prevalence of persistent bovine viral diarrhea infection (PI) in industrial dairies of Tehran and Alborz province, Iran. Materials and Methods: In this cross-sectional study, 102371 blood samples were collected from bovine of industria...

The aim of this study was to investigate the relationship between mental health and quality of work life and job burnout of elementary school teachers at Education Organization of Tehran Province. The research methodology is “applied” in terms of objective while its research method was “descriptive” which is categorized in the field correlation research in terms of data collection. The subject ...

Nineteen species of mostly epiphytic lichens from the forests of Nowshahr and Royan located in Mazandaran province (N Iran) are reported. Three species, Ochrolechia pallescens, Phaeophyscia confusa and Usnea longissima, are newly reported for lichenized mycota of Iran and seven species are new to the province. Additionally, a short history of lichenological exploration in the Hyrcanian forest i...