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Immuno-Scanning Electron Microscopy Reveals That Urease Is Associated with the Microvesicles on the Surface of Helicobacter pylori

✍ Scribed by Hyun Jin Hai; Yong Sik Kim; Hoon Jai Chun; Hwang Rae Chun; Chang Won Baeck; Yu Sang Kyun; Yoon Tae Jeen; Sang Hoon Lee; Ka Hyung Han; Chang Hyun Park; Chang Sub Uhm; Hong Sik Lee; Soon Ho Um; Sang Woo Lee; Jai Hyun Choi; Chang Duck Kim; Ho Sang Ryu

Book ID: 118525825
Publisher: Elsevier Science
Year: 2005
Tongue: English
Weight: 58 KB
Volume: 61
Category: Article
ISSN: 1097-6779
DOI: 10.1016/s0016-5107(05)00957-0

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Oxygen interaction of CdS-based gas sens

Oxygen interaction of CdS-based gas sensors with different stoichiometric compositions was studied by X-ray photoelectron spectroscopy (XPS) and thermal-desorption mass spectroscopy observations combined with conductivity measurements. Three different types of film with different atomic ratios of Cd/S were used in the study of oxygen chemisorption in a low-temperature range between 300 and 570 K. Spray pyrolysis was used for the deposition of the films on glass substrates; XPS and energy dispersive spectroscopy of X-ray together with atomic force microscopy and scanning electron microscopy were used for the characterization of the composition and structure of the films. It was possible to distinguish different temperature ranges for the thermal desorption of the different adsorbed oxygen species. A comparison of the data from XPS and mass-spectroscopy observations with conductance measurements allows to conclude that metallic surface atoms are responsible for different interactions of oxygen species with CdS surfaces.

📂 Article 📅 1995 🏛 Elsevier Science 🌐 English ⚖ 379 KB