relationships between soil factors and vegetation types in playa of damghan was investigated. six vegetationtypes including artemisia.sieberi, arundo. sp, artemisia.sieberi-peganum.harmala, alhagi.cammelerom,artemisia.sieberi-petropyron.sp, tamarix.passerinoides-halocnemum strobilaceum. one bare land was recognized inthe study area and the research was conducted within mentioned types. canopy p...

heavy metal contamination around the national iranian lead and zinc company (nilz) in zanjan province was evaluated in this paper. collected data were used to appraise the degree of soil contamination and also the source of pollution in the study area based on geoaccumulation index (igeo), and enrichment factor (ef). the levels of fe, zn, cd and pb in the samples exceed those reported in litera...

numbers of persian leopards have considerably decreased in recent years and for this reason it has been categorized as endangered in the iucn classification. habitat destruction is believed to be the main cause of the species population decline. hence, attempts to preserve the remaining habitats of this kind of animal effectively are deemed essential in reversing its downgrading trend. to hit t...

conclusions four major dietary patterns were identified in the present studied population that can be used to provide tangible dietary advice for the elderly. results four major dietary patterns were identified in the studied population: 1) healthy pattern, characterized by a higher intake of vegetables, tomato and tomato sauce, vegetable oil, olive, and fruits; 2) unhealthy pattern, characteri...

conclusions the 11 item hausa-mspss index is valid for the assessment of perceived social support among stroke survivors in nigeria. results based on expert panel, clinicians’ review and patients’ feedback, the 12 item hausa-mspss had sufficient face, content and criterion validity. in reliability analysis, the cronbach’s alpha was 0.781. in test-retest reliability analysis, the minimum kappa v...

Objective: The purpose of this study was to identify factors influencing student’s achievement motivation. Statistical population of this research consisted of Agriculture Ms.c students in Tehran university (N=712). Methods: A random sampling method was used to collect data From 175 students applying Cochran's formula. The main tool to collect data was a researcher made questionnaire. Content v...

The aim of the current study was twofold: (1) to validate the internal structure of the general English (GE) section of the university entrance examination for Ph.D applicants into the English programs at state universities in Iran (Ph.D. UEE), and (2) to examine the factor structure invariance of the Ph.D. UEE across two proficiency levels. Structural equation modeling (SEM) was used to analyz...