background: immunological factors are important in pregnancy loss because of the interaction between mother and fetus. t-regulatory cells as the component of humeral immune response play important role in the fetu-maternal interface. one of the regulatory mechanisms for these cells is mediated by antigen independent co-stimulatory signals and interaction of cytotoxic t-lymphocyte antigen 4 (b7/...

background: it has been proposed that oxidative stress plays an important role in male infertility. the aims of this study were to compare seminal plasma levels of 15-f2t-isoprostane (8-iso-pgf2?), malondialdehyde (mda), and total (sum of free and bound) homocysteine (thcy) in normozoospermic vs. asthenozoospermic men, and to examine the relationships between thcy and lipid peroxidation product...

in this study the impact of freezing rate and degree of pre-fermentation on sangak frozen dough and its bread was assessed. the pre-fermentation was between zero and 120 min and the corresponding secondly fermentation was between 120 and 0 min, respectively, to obtain total fermentation time of 120 min. the pre-fermentation dough was formed in flat shape and frozen under -20, -25 and -30 °c. it...

detopping in some plants reduces vegetative growth and increases transporting of photosynthate materials to specific sinks such as seeds. to study the effects of detopping removal and plant density on yield and yield components of faba bean (vicia faba l.), an experiment was carried out as a factorial arrangement based on a randomized complete block design with three replications at farm resear...

abstract statistical methods are one of the useful tools for climatic elements and their behaviors analysis, as well as, modeling and predicting them subtly. in this paper the behavior of time series of annual temperature of zanjan during 1956-2005 have been studied. so, based on autocorrelation, correlation coefficient, and spearman and mann - kendall ways, the data trend was determined. the a...

objective(s) 7-prenyloxycoumarins including 7-isopentenyloxycoumarin, auraptene and umbelliprenin, and herniarin have been widely recognized as bioactive coumarins. this paper presents the ways to synthesis these compounds. materials and methods 7-prenyloxycoumarins were synthesized by reaction between 7-hydroxycoumarin (' m) and relevant prenyl bromides (1.5 m) in acetone at room temperat...

polyacrylonitril (pan)-supported chitosan (cs) nanocomposite membranes were prepared by cross-linking the cs with 3-aminopropyl-triethoxysilane (apteos) via sol-gel method. pervaporative performances of the cs-sio2/pan membrane for dehydration of aqueous alcohol solutions were investigated. from sem cross-sectional images of the membrane, the spongy pores and the finger-like pores were found in...

1. introduction isfahan oil refinery (isfahan, iran) is responsible for the production of huge amounts of oil waste. as the released organic compounds are highly toxic, carcinogenic, and mutagenic, they can potentially contaminate the soil and groundwater resources of the adjacent area. this is particularly important in isfahan where arid/semi-arid climate has limited the access to adequate sur...