promotion of exclusive breastfeeding: teaching good positioning and support from fathers and families     sakkaki m [1] *, khairkhah m [2]     received: 23 aug, 2012 accepted: 21 nov, 2012     abstract   background & aims : breastfeeding has many advantages for both mothers and infants. several factors have negative effect on the duration of breastfeeding, one of them being mode of delivery. ca...

Biochar improves soil physical, biochemical, and microbial properties, leading to the amelioration of fertility, which, in turn, results better growth yield crop plants. The current study aimed evaluate whether using different levels biochar can enhance characteristics plant attributes. Accordingly, an experimental was conducted 2022 a randomized complete block design with four replications (n ...

Introduction: Despite the high prevalence of social anxiety disorder and necessity conducting etiological studies, existing measures lack robust factor structure due to methodological flaws, leading doubtful results. Aim: The present study is aimed investigate structure, reliability, convergent validity Iranian version Social Phobia Inventory (I-SPIN). Method: This a cross-sectional, psychometr...

The effects of nitrogen and phosphorus levels on the physiological traits, yield, seed yield rapeseed (Brassica napus L.), were studied in a farm research project Zanjan University. Three (0, 100, 200 kg/ha) three 75, 150 considered. results showed that an increase level caused leaf chlorophyll content so application kg/ha increased leaves until mid-grain filling stage. Nitrogen lowered stomata...

the purpose of this study was to investigate relationship between rate of internet use and the type of its use with academic performance of the students in islamic azad university of zanjan. to reach this goal, in addition to theoretical studies and investigating research literature, data were collected by a researcher-made questionnaire. experts approved the validity of the questionnaire and t...