there are many small kaolin deposits in iran , which are extracted and used in ceramic industry without any treatment. this investigation was aimed to study the ore and to find whether a fine material can be produced for paper usages. the ore was studied by xrd, dta, optical and scanning microscopy. physical properties, such as brightness were also examined. the main minerals , presented in sem...

كچ ي هد فده و هقباس : هاگشناد تلاسر و مسج تملاس ءاقترا و نيصصختم تيبرت اه يم هعماج ناور دشاب . تسد يارب يباـي تلاسر نيا هب و دمآراك ،ملاس ،قيلا يناصصختم دنناوتب ات ،دنشاب ملاس دياب دوخ نانكراك ،لااو هعماج هب تبسن لوئسم دنيامن تيبرت . نيا زا تيولوا زا نانآ يناور تملاس تيعضو يسررب ور يم يتاقيقحت ياه دشاب . نيـيعت فده اب حرط نيا نا نانمس يكشزپ مولع هاگشناد نانكراك يناور تملاس تيعضو ديدرگ ماج ....

The objective of the current research is carrying out the evaluation of the distribution, source, and environmental health risk of polycyclic aromatic hydrocarbons (PAHs) compounds in soil samples taken from the vicinity of Tehran-Semnan road, Iran. This road is a densely populated one in central northern part of Iran with a heavy load of vehicular traffics and several industrial complexes. Fou...

هديكچ فده و هقباس : راتسرپ هفرح ي م رد سرتسارپ لغاشم ردص رد ي ب لغاشم نا تشاده ي نامرد و ي لـماوع و دراد رارـق سرتسا از ي لغش ي ددعتم ي ناور تملاس ي لغاش ي ا ن ي م رارق رطخ ضرعم رد ار هفرح ن ي دهد . فدـه اـب رـضاح شهوژپ سررب ي ت أ ث ي نت لماوع ر ي گد ي ناور تملاس رب از ي نانمس رهش ناراتسرپ دش ارجا . شور و داوم اه : رامآ هعماج ي زا دوب ترابع لك ي ر ناراتسرپ ه مس ي ب ي ناتسرام اه ي رهش هك ...

BACKGROUND The aim was to study the gastro-intestinal helminths of stray dogs of Garmsar, Semnan Province, Central Iran, and its impacts on human health and animal production. METHODS During 2006, the alimentary tracts of 50 stray dogs at necropsy, selected from villages around Garmsar, were removed, and examined for helminth infections. Subsequently helminths were collected from the contents...

هدیکچ هقباس و فده : ناطرس زا بسانم تاعلاطا اب یم صاخ یئایفارغج هیحان رد فلتخم یاه همانرب ناوت ار یبط یاه یارب لابرغ و نامرد یرگ ) Screening ( هورگ دومن صخشم رطخرپ یاه . نآ زا هک اج گرم نازیم نانمس ناتسا تشادهب زکرم لااب ریم و ی زکرم رد یناقوف شراوگ هاگتسد ناطرس رثا رب ار ی ا هدرک شرازگ ناریا تس . یماـمت تـبث و یـسررب یارـب تفریذپ ماجنا یعماج قیقحت نانمس ناتسا یموب تیعمج نیب رد ناطرس دراوم ...

In this paper, we present an access method called branch index for query processing of the aggregation hierarchy as a tree in object-oriented databases. The algorithm of branch generation will be proposed to generate all branches for the tree aggregation of classes in the database. For each branch, the information of linking objects is stored so that class traversal methods can be eliminated. U...

large-scale climatic signals including ocean-atmosphere interactions, are the main factors influencing the earth’s climatic oscillations and are the most important indices in predicting of climate variables. in this research, precipitation in the next month was predicted by applying artificial neural network (ann), neuro-fuzzy network (nfn), and multiple linear regression (mlr) in semnan synopt...

The physiological and biochemical responses of three ecotypes of Artemisia absinthium L. from Iran were evaluated under salinity conditions. Salinity treatments were made by NaCl with EC of 0, 5, 10 and 15 dS/m.   Physiological and biochemical attributes were measured 30 days after the salt treatments imposed. Highest reduction in the shoot and root fresh weights was observed in the ecotypes of...