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Sueyoshi, Mitsuhiro,Furue, Toshihiko,Sato, Akihiro,Yokoyama, Kenichi,Yamadera, Yoshimi,Fujiwara, Kiyoshi,Matsuda, Katsuhiko 한국부식방식학회 2002 Corrosion Science and Technology Vol.31 No.5
Aluminum brass tubing which is highly cost-effective and has a high heat transfer property has been widely used for seawater cooled condenser in Japan. However, the tubing suffers from erosion and corrosion on the inner surface in spite of ferric-ion injection and cathodic protection. Ammonia also attacks the outer surface after long years of service. Periodic replacement with new tubing has been performed. Titanium tubing which has high corrosion resistance, has been used in new condensers and for the air removal zone of the condenser. However, its service has been restricted due to higher cost and lower elastic modulus. As a countermeasure, we have developed a high performance ferritic stainless steel tubing called "Super Stainless: FS1O" which has excellent corrosion resistance and is highly cost-effective. First, the tubings were used experimentally in our Buzen thermal power station, Unit 2 condenser in 1993, and various investigations have been performed on the extracted tubing and tube sheet every year. Ammonia attack on the outer surface, corrosion and erosion on the inner surface, crevice corrosion between the tube and the tube-sheet. Hz absorption and degradation of properties was not observed. Based on these results, 1,006 pieces of FS1O were installed in Buzen thermal power station, Unit I condenser in 1996. The tubing has been used in seawater without any corrosion problems.
Matsumoto, Daisaku,Takagi, Mitsuhiro,Hasunuma, Hiroshi,Fushimi, Yasuo,Ohtani, Masayuki,Sato, Tadashi,Okamoto, Koji,Shahada, Francis,Tanaka, Tetsuya,Deguchi, Eisaburo Asian Australasian Association of Animal Productio 2009 Animal Bioscience Vol.22 No.12
Two field studies were conducted to determine the efficacy of difructose anhydride III (DFA III) as a supplement in colostrum replacer (CR) for improving the general health status (judged on the basis of incidence of enteritis, bronchitis, and pneumonia) of group-housed suckling Japanese Black calves. In a preliminary study, CR supplemented with DFA III (6 g) was orally administered within 24 h of calving to eight individually reared calves fed colostrum (DFA III group) (Exp. 1). Subsequently, CR supplemented with DFA III (6 g) was orally administered twice within 2 and 12 h of calving to four calves (DFA III group) that were not fed colostrum (Exp. 2). In both experiments, the health status of the calves was assessed during the preweaning period. In Exp. 2, hematological and blood-chemistry parameters were analyzed 24 h after the second administration of CR and at 1 wk and 1 month after calving. The results were compared between the DFA III and control groups (without DFA III supplementation; Exp. 1: n = 10, Exp. 2: n = 4). In Exp. 1, the number of calves requiring medications for the treatment of enteritis, bronchitis, and pneumonia during the preweaning period was significantly (p<0.05) lower in the DFA III group than in the control group. In Exp. 2, supplementation of DFA III did not influence the gain in body weight of calves during the pre-weaning period. Calves in the DFA III group tended to require medications for a shorter duration than those in the control group (DFA III: 10.3 d/calf, control: 21.3 d/calf; p = 0.07). Significant differences (p<0.05) in the level of mean corpuscular hemoglobin, total protein, total cholesterol, and immunoglobulin (Ig)G were observed between the DFA III and control groups. These differences probably reflect the health and nutritional status of the calves. Additionally, the serum iron and lactoferrin concentrations at 24 h and 1 wk after calving, respectively, differed significantly between the 2 groups. These concentrations might reflect the incidence of infections after calving. The present study revealed that the administration of DFA III as a CR supplement may prevent diseases in group-housed calves during the pre-weaning period.