نتایج جستجو برای: electron contamination
تعداد نتایج: 359689 فیلتر نتایج به سال:
Saliva contamination of etched enamel before sealant application is the most common reason for failure fissure sealants, thus affecting effect caries prevention. This study aimed to evaluate shear bond strength (SBS) and microleakage resin-based on saliva-contaminated after rinsing, re-etching, applying universal adhesive. Fifty human third molars were sectioned into 2 parts embedded in acrylic...
We outline a systematic experimental and theoretical study on the influence of ruthenium contamination oxygen reduction activity (ORR) Pt/C catalyst at potentials relevant to polymer electrolyte fuel cell cathode. A commercial was contaminated by different amounts ruthenium, equivalent 0.15–4 monolayers. The resulting ruthenium-contaminated powders were characterized energy–dispersive x–ray spe...
Food contamination by Listeria monocytogenes remains a major concern for some food processing chains, particularly for ready-to-eat foods, including processed foods. Bacterial adhesion on both biotic and abiotic surfaces is a source of contamination by pathogens that have become more tolerant or even persistent in food processing environments, including in the presence of adverse conditions suc...
OBJECTIVES Osteoblasts are the most important cells in the osseointegration process. Despite years of study on dental Implants, limited studies have discussed the effect of saliva on the adhesion process of osteoblasts to implant surfaces. The aim of this in vitro study was to evaluate the effect of saliva on morphology and differentiation of osteoblasts attached to implant surfaces. MATERIAL...
Preliminary results of the analyses of five carbonaceous materials (particle size of approximately 50 μm) from the Hayabusa spacecraft sample catcher, including their texture, chemistry, and chemical/isotopic compositions, are summarized. The carbonaceous particles underwent sequential analysis using a series of microanalytical instruments located at several research institutes and universities...
This study involves the measurement of photoneutron contamination emitted from a Siemens Primus medical linear accelerator by using BD-PND bubble detectors. Various bubble detectors were arranged around the linac head with the interval of I m and at the same height as the isocenter to measure the dose equivalent distribution in the treatment room. The measurements were performed for 15 MV X-ray...
ZnO nanosheets are a relatively new form of nanostructure and have demonstrated potential as gas-sensing devices and dye sensitised solar cells. For integration into other devices, and when used as gas sensors, the nanosheets are often heated. Here we study the effect of vacuum annealing on the electrical transport properties of ZnO nanosheets in order to understand the role of heating in devic...
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