نتایج جستجو برای: barium study

تعداد نتایج: 3974871  

Journal: :Internal Medicine 2015

In the present work, the synthesis of Barium hexaferrite (BaFe12O19) nanoparticles in thepresence of a large excess amount of OH− anions by the hydrothermal method in the presence and absence of surfactants such as Sodium dodecyl benzene sulfonate and Triton X-114 was reported. The optimized temperature in the absence of surfactant was determined (200 °C) and then Barium hexaferrite nanoparticl...

2002
Marta E. Torres James McManus Chih-An Huh

Material fluxes associated with fluid expulsion at cold seeps and their contribution to oceanographic budgets have not been accurately constrained. Here we present evidence that the barium released at cold seeps along the San Clemente Fault zone may significantly impact the geochemical budget of barium within the basin. Barium fluxes at seep localities on the fault scarp, measured with benthic ...

Herein, we present the case of a 45-year-old woman with pulsion and midesophageal diverticula, who had complaints of dysphagia and regurgitation. Diagnosis was confirmed by endoscopy and barium swallow. The patient underwent right posterolateral thoracotomy with excision of diverticula and repair of the muscular layer along the site of diverticula. Five days following the operation, barium swal...

Journal: :The Medical journal of Malaysia 2000
K Siti Mazliah M Z Norzila C T Deng A Zulfiqar B H Azizi

OBJECTIVES This was a cross sectional study conducted in the Paediatric Institute among infants and children with chronic respiratory symptoms with the following objectives: i) to determine the prevalence of gastro-oesophageal reflux in children with persistent respiratory symptoms, ii) to identify the clinical predictors of GOR (Gastro-oesophageal reflux) in children with persistent respirator...

Journal: :علوم و تکنولوژی پلیمر 0
یحیی همزه امیرحسن رهبری مرتضی انحصاری قنبر ابراهیمی

studies were carried out on the preparation and properties of the composites made from cellulose acetate butyrate and cellulose acetate propionate with various amounts of barium strontium titanate nano-particle. the nano-particles of barium strontium titanate (bst) with formulation of ba0.77sr0.23tio3 were made by sol-gel method and their purity and particle size were analyzed by x-ray diffract...

Journal: :journal of petroleum science and technology 0
badr salem ba geri king fahd university of petroleum and minerals mohamed a. mahmoud king fahd university of petroleum & minerals, reyad a. shawabkeh king fahd university of petroleum & minerals abdulazeez abdulraheem king fahd university of petroleum & minerals,

barium sulfate (barite) is one of the widely used weighting materials in the preparation of drilling fluid for deep oil and gas wells. barite is not soluble in the regular solvents; such as, hydrochloric acid (hcl) and other acids. therefore, in this study, we focused on evaluating the dissolution of the industrial barite particles in different chelating agents. chelating agents; such as, dieth...

Journal: :AJR. American journal of roentgenology 1998
S Glick J L Wagner C D Johnson

Journal: :Chemical Society reviews 2014
Nazanin Bassiri-Gharb Yaser Bastani Ashley Bernal

Chemical solution deposition (CSD) provides a low-cost, versatile approach for processing of thin and ultrathin ferroelectric films, as well as short and high aspect ratio ferroelectric nanostructures. This review discusses the state of the art in the processing of ferroelectric oxide thin films and nanostructures by CSD, with special emphasis on nucleation and growth phenomena. The effects of ...

2013
Wade D. Smith Jessica A. Miller Selina S. Heppell

Differences in the chemical composition of calcified skeletal structures (e.g. shells, otoliths) have proven useful for reconstructing the environmental history of many marine species. However, the extent to which ambient environmental conditions can be inferred from the elemental signatures within the vertebrae of elasmobranchs (sharks, skates, rays) has not been evaluated. To assess the relat...

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