نتایج جستجو برای: jajarm deposite
تعداد نتایج: 86 فیلتر نتایج به سال:
Modelling and optimization of digestion efficiency of bauxite in Bayer process: Iran Alumina company
In the present work, we investigated and optimized the digestion efficiency, A/S (Al2O3/SiO2 in red mud), and N/S (Na2O/SiO2 in red mud) of mixed bauxite in Iran Alumina Company using the Bayer process. Digestion experiments were carried out in an induction rotary autoclave on a mix of Jajarm, Yazd, Tash, and Shirin Cheshmeh baux...
The Jajarm bauxite deposit is a part of the Irano-Hymalayan karst bauxite belt which is located about 175 km southwest of Bojnourd. This deposit has been developed as a stratiform horizon along the contact of Triassic dolomites and the Jurassic shales and sandstones. The basal contact zone of the bauxite horizon is mainly undulatory, and bauxite fills cavities in the footwall dolomite, whereas ...
the study was performed for assess the environmental factors affecting weed species diversity and composition of wheat (triticum aestivum l.) fields in jajarm, north-khorasan of iran, in 2009. the crop management (herbicide, amount of nitrogen applied and preceding crop type) and edaphic factors (ph, texture and content of phosphorus) of 16 fields were collected. shannon’s diversity index, spec...
Introduction: The aim of this study was to determine the mediator role of anxiety and depression in relationship between attachment styles and job satisfaction among teachers. Methods: The method of the present study was correlation. Statistical population in this research, included all of 210 teachers of Jajarm schools in 2015. Then according to Kerjcie and Morganʼ sampling table, 136 teach...
Introduction: Cognitive abilities are necessary for successful learning. Children with different cognitive ability levels may have diverse performances. The current study aimed at investigating the cognitive profile in children and its relationship with Academic Performance. Methods: The population of the current cross sectional study consisted of all students in Jajarm City, Iran. The subject...
Objectives: Behavior rating scales have been developed to increase ecological validity in the measurement of executive functions. As the teachers have a lot of contact with the students in the school environment, behavioral rating scale teacher’s form can provide useful information. The purpose of this study was to investigate the reliability and validity of the behavioral rating inventor...
Upper Jurassic carbonate successions have excellent exposure in Binalud Mountains, west of Bojnurd, northeast and southwest Jajarm area with thickness of about 500m. Chert nodules are present in various shapes such as spherical, elliptical, elongated, discoid and irregular. Silicifications in these deposits are mostly replacement for the carbonate minerals. The presence of carbonate residues in...
wind regime and sand grain size are two of the factors that determine the morphology and dynamics of sand dunes in desert areas. regarding the importance of wind effects on sand dunes especially in iran, in this study, khartooran erg was analyzed to determine wind direction and to detect sand source sites. khartooran erg is located on eastern north of iran and lies in khorasan razavi and semnan...
Wind regime and sand grain size are two of the factors that determine the morphology and dynamics of sand dunes in desert areas. Regarding the importance of wind effects on sand dunes especially in Iran, in this study, Khartooran Erg was analyzed to determine wind direction and to detect sand source sites. Khartooran Erg is located on eastern north of Iran and lies in Khorasan Razavi and Semnan...
معاملات تجاری بر اساس اصول حیاتی و مفید اعتبار و سرعت استوار گردیده اند. از این رو قانونگذاران تمام توان خود را برای تقویت هر چه بیشتر این اصول بکار گرفته اند.یکی از راهکارهای مهم و اقدامات انجام گرفته در این زمینه وضع مقررات مربوط به ورشکستگی است،که حجم زیادی از قانون تجارت و لایحه به این مقررات اختصاص یافته است.این مقررات در قانون تجارت عمدتا در راستای اجرای اصل تساوی بستانکاران وضع شده اما د...
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