نتایج جستجو برای: barium zirconate
تعداد نتایج: 9206 فیلتر نتایج به سال:
Barium (Ba) with CAS number 513-77-9 and atomic number 56 is a soft silvery metallic alkaline earth metal. It has a high chemical reactivity and is never found in nature as a free element. It is highly toxic upon acute and chronic exposures (Bhoelan et al., 2014). Barium has been tested for its toxicity in different studies (Llugany et al., 2000; Langdon, 1994; Akinfieva and Gerasimova, 1984). ...
OBJECTIVES/HYPOTHESIS This study tested the hypotheses that swallowing apnea duration (SAD) will increase given barium versus water, chemesthetic stimuli (i.e., water < ethanol, acid, and carbonation) mixed with barium, age (older > younger), and genetic taste differences (supertasters > nontasters). STUDY DESIGN Prospective group design. SETTING University Medical Center. METHODS Eighty ...
Barium ions enter chromaffin cells via voltage-sensitive calcium channels, although the intracellular site of barium action is distinct from that of calcium. The entry of barium primarily through voltage-sensitive channels was indicated by experiments showing inhibition of 133Ba2+ uptake by blockers of voltage-dependent calcium channels. In addition, 133Ba2+ uptake was stimulated by 50 mM KCl b...
Barium sulphate has been used as a gastrointestinal (GI) contrast agent for over 100 years. Since the first report of single contrast barium radiography in 1910, barium techniques have evolved in parallel with technical developments such as fluoroscopic image intensification. Double contrast techniques were first described in the 1920s but did not become mainstream until the 1960s and 1970s whe...
nowadays various methods are presented for synthesis of barium strontium titanate (bst) nanopowders with different morphology and properties. each of these (bst)s has got individual characterization that makes it suitable for a special application. every method has a special quality, causes it to have preference over the other methods. low processing temperature is a desired point which most of...
Nanoparticles of barium carbonate/oxalate have been synthesized in situ from barium nitrate and ammonium carbonate/oxalate by reverse micelle method. These particles were characterized using transmission electron microscope (TEM), fourier transform infrared (FTIR) and x-ray diffraction (XRD). The results indicate that rod-like barium carbonate (BaCO3) and spherical barium oxalate (BaC2O4) nanop...
abstract appendiceal intussusception is a very rare cause of abdominal colic in childhood. this paper reports a reducible appendiceal intussusception in the barium enema in a girl and reviews articles in pubmed.
In the present study, the phase transition of clinoptilolite, 16(Na, K)6[Al6Si30O72]. 20H2O, to barium zeolites, has been investigated in the alkaline hydrothermal conditions, at the presence of the barium bearing solutions, and the high temperature. Firstly, the primary sample collected from Aftar area, west of Semnan. Secondly, powdered and examined without purification. Clinoptilolite, as a ...
Piezoelectric principles are widely used to harvest energy in the process of vibrating piezoelectric mass. Different design configurations were studied in the research papers listed. A novel dynamic method of Lead Zirconate Titanate Sensor (PZT) to obtain d33 suitable for the MEMS applications is designed, simulated and analysed results were compared with the fabricated sensor. The Lead Zircona...
Health risk for well drinking water is a worldwide problem. Our recent studies showed increased toxicity by exposure to barium alone (≤700 µg/L) and coexposure to barium (137 µg/L) and arsenic (225 µg/L). The present edition of WHO health-based guidelines for drinking water revised in 2011 has maintained the values of arsenic (10 µg/L) and barium (700 µg/L), but not elements such as manganese, ...
نمودار تعداد نتایج جستجو در هر سال
با کلیک روی نمودار نتایج را به سال انتشار فیلتر کنید