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  • 1
    Electronic Resource
    Electronic Resource
    Polaprezinc Attenuates Helicobacter pylori-Associated Gastritis in Mongolian Gerbils (2002)
    Oxford, UK : Blackwell Science Ltd
    Helicobacter 7 (2002), S. 0 
    Details
    ISSN: 1523-5378
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Medicine
    Notes: Background. The ammonia-monochloramine system plays an important role in Helicobacter pylori-associated gastric mucosal injury. Polaprezinc, a new antiulcer agent, has a scavenging action against monochloramine. The aim of the experiment was to investigate the inhibitory effects of polaprezinc on the H. pylori-induced gastritis in Mongolian gerbils.Materials and Methods. Mongolian gerbils fasting for 24 hours were orally given culture broth containing 2–4 × 108 colony-forming units of H. pylori ATCC 43054 per milliliter. From 4 hours after inoculation until the end of the experiment, gerbils were given chow pellets with or without 0.02% polaprezinc. All gerbils were killed 12 weeks later. The grades of H. pylori density and histologic features of gastritis were evaluated in accordance with the Updated Sydney System. The scavenging effect of polaprezinc on monochloramine was investigated spectrophotometrically.Results. Polaprezinc had little or no influence on the H. pylori density in both pyloric and fundic mucosae. However, it significantly attenuated the development of polymorphonuclear neutrophil activity, mononuclear infiltration, and surface epithelial erosion in both pyloric and fundic mucosae compared with those of the control group. H. pylori inoculation significantly increased the heights of both pyloric and fundic mucosae (mainly due to the increased height of foveolar hyperplasia), but polaprezinc inhibited the increase of mucosal thickness in both pyloric and fundic mucasae. No intestinal metaplasia was detected in this study. Spectrophotometric examination revealed that polaprezinc scavenged monochloramine.Conclusions. Polaprezinc inhibited the development of H. pylori-induced gastritis through its scavenging action against monochloramine.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1046/j.1523-5378.2002.00114.x
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  • 2
    Electronic Resource
    Electronic Resource
    Reaction heat effects on initial linear shrinkage and deformation in stereolithography (1999)
    Bingley : Emerald
    Rapid prototyping journal 5 (1999), S. 120-128 
    Details
    ISSN: 1355-2546
    Source: Emerald Fulltext Archive Database 1994-2005
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: In the industrial use of stereolithography, precision is always a problem. The basic phenomenon of solidification shrinkage has not been sufficiently investigated. This study aims at clarifying the initial linear shrinkage of cured resin in a minute volume. Experimental equipment has been developed which measures the time history of the single strand in situ in a stereolithography machine. An analysis model of the time history of a minute volume linear shrinkage was shown using the measured shrinkage of a cured line segment. The relation between the time history of the linear shrinkage and temperature was measured and the shrinkage in the minute volume after irradiation was found to result due to temperature variation. Deformation and linear shrinkage were measured with two scanning orders to control the thermal distribution in layer forming. The effects of thermal distribution were also observed in one layer forming.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1108/13552549910278946
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  • 3
    Electronic Resource
    Electronic Resource
    More effective endoscopic resection with a two-channel colonoscope for carcinoid tumors of the rectum (1996)
    Springer
    Diseases of the colon & rectum 39 (1996), S. 1438-1439 
    Details
    ISSN: 1530-0358
    Keywords: Carcinoid tumor ; Rectum ; Two-channel colonoscope ; Colonoscopic resection ; Surgical technique
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract PURPOSE: Complete resection of small carcinoid tumors of the rectum is difficult with conventional polypectomy, because these tumors are most often located in the submucosal layer of the rectal wall. To completely remove these tumors, we used a two-channel videocolonoscope with which both a grasping forceps and a polypectomy snare could be used simultaneously. We evaluated its clinical usefulness in comparison with one-channel colonoscopic polypectomy. METHODS: At Osaka Medical Center for Cancer and Cardiovascular Diseases, seven carcinoid tumors in seven patients were removed with a one-channel videocolonoscope from 1985 to 1992. In 1993 and 1994, ten tumors in nine patients were removed with a two-channel colonoscope. RESULTS: The rate of complete removal of carcinoid tumors with a two-channel videocolonoscope (9 of 10 tumors, 90 percent) was significantly higher (P〈0.05) than with a one-channel videocolonoscope (2 of 7 tumors, 29 percent). No complications occurred during or after endoscopic resection with a two-channel colonoscope. CONCLUSIONS: Endoscopic resection with a two-channel colonoscope is a useful and safe method for resection of small carcinoid tumors of the rectum.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02054536
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