this study purported to compare and contrast the use of self-mention and evidentials as two mtadiscourse features in opinion columns of persian and english newspapers. the theoretical basis of this study is the idea that metadiscourse features vary across cultural boundaries. for this purpose, 150 persian and 150 english opinion columns were collected based on three factors of topic, audience a...

The aim of this study was to evaluate the accumulation of Lead, Copper, Cadmium and Mercury in the soft tissues of brown algae (Sargassum ilicifolium) and muscle of spiny lobster (Panulirus homarus) in a five different stations along the northern coasts of the Oman Sea during pre and post monsoon seasons. A number of 50 specimens of each sample were collected from stations of Jask port, Darak ...

the aim of the present study was to investigate the frequency and the type of discourse markers used in the argumentative and expository writings of iranian efl learners and the differences between these text features in the two essay genres. the study also aimed at examining the influence of the use of discourse markers on the participants’ writing quality. to this end the discourse markers us...

126 abstract: in this research we studied the effects of cyclic hydration and dehydration of cysts of artemia urmiana and artemia parthenogenetica on the hatching percentage, survival and growth. the experiment was carried out in 3 treatments (1-3 hydration/dehydration cycles) with 3 replicates for each treatment. later effects of cold preservation at -20°c during three time periods were ...

The present research was undertaken in order to measure the concentrations of heavy metals in tissues of the Scomberomorus commerson and Scomberomorus guttatus in Bushehr seaport. 20 samples of S. commerson and 20 samples of S. guttatus were cathed randomly from Bushehr seaport. After biometry of fish, the tissue samples were taken from muscles and liverand chemical digestion of the samples wer...

One of the major global concerns about the environment is the pollution of aquatic ecosystems by heavy metals. These elements contaminate aquatic environments and accumulate and concentrate at through bioaccumulation in the tissues of living organisms at higher levels of the food chain consumed by humans. The aim of this study was to investigate the concentrations of three heavy metals, lead, n...

the present study investigated construct equivalence of multiple choice (mc) and constructed response (cr) item types across stem and content equivalent mc and cr items (item type ‘a’), non-stem-equivalent but content equivalent mc and cr items (item type ‘b’), and non-stem and non-content equivalent mc and cr items (item type ‘c’). one hundred seventy english-major undergraduates completed mc ...

boron nitride semiconducting zigzag swcnt, $b_{cb}$$n_{cn}$$c_{1-cb-cn}$, as a potential candidate for making nanoelectronic devices was examined. in contrast to the previous dft calculations, wherein just one boron and nitrogen doping configuration have been considered, here for the average over all possible configurations, density of states (dos) was calculated in terms of boron and nitrogen ...

during the process of reading, sometimes learners use ineffective and inefficient strategies and some factors may influence their use of strategies. perhaps critical thinking is one of these factors. this study aims to identify those categories of reading strategies that are mostly used by iranian efl learners and to see if there is any significant relationship between the critical thinking abi...

Introduction: Since, rice is the main source of food for the majority of people in the world, including Iran, determine of concentration and distribution of heavy metals in rice plants is important. The aim of this study was to determine cadmium, chromium and zinc concentrations in rice produced of the Mobarakeh County. Material and Method: Sampling was conducted based on stratified random met...