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Formation Characteristics of Propane Hydrate Using Fiber Layer
HIROYUKI KUMANO,Tatsunori Asaoka,Kento Sugaya,Yuta Mochizuki,Masashi Okada 대한설비공학회 2015 International Journal of Air-Conditioning and Refr Vol.23 No.4
Formation characteristics of propane hydrate using fiber layer were investigated experimentally. Water and propane gas contact in the fiber layer, and the propane gas hydrate can be formed continuously. In the experiment, pressure, temperature, the quantity of water and porosity of the fiber layer were varied as the experimental parameters, and the formation ratio and the formation rate were measured. As a result, it was found that the high formation ratio can be obtained by using the fiber layer. Therefore, it can be said that this method is useful to reduce energy consumption and to simplify the apparatus, since it does not need circulation system. Moreover, it was found that the formation rate increases with the subcooling and the quantity of water, and it is slightly affected by the porosity of the fiber layer
Fujie,Koichi,Okada,Mitumasa,Kawashima,Hiroyuki,Okazaki,Minoru 嶺南大學校 環境問題硏究所 1995 環境硏究 Vol.15 No.1
A hollow fiber microfiltration (HMF) membrane featured an unique air-backwashing and a high filtrate flux under a low pressure and a low cross flow rate was successfully incorporated with the aerobic submerged biofilters for the advanced treatment of domestic wastewater. HMF system A in which the wastewater filtrated directly by the HMF membrane was treated by the aerobic submerged biofilter and HMF system B in which the moving bed aerobic biofilter (MBF) was followed by the HMF were proposed and were investigated in terms of the filtrate fluxe, the organic removal, the power consumption and the running cost based on the experimental results. The running cost was comparable with the conventional activated sludge process, whereas the effluent quality was superior than that.
( Yoshiyasu Kono ),( Hiroyuki Okada ),( Ryuta Takenaka ),( Ko Miura ),( Hiromitsu Kanzaki ),( Keisuke Hori ),( Masahide Kita ),( Takao Tsuzuki ),( Seiji Kawano ),( Yoshiro Kawahara ),( Kazuhide Yamamo 대한소화기기능성질환·운동학회 2016 Gut and Liver Vol.10 No.1
Background/Aims: The interaction between nonsteroidal anti-inflammatory drugs (NSAIDs) and Helicobacter pylori remains controversial. We retrospectively investigated whether H. pylori infection exacerbates severe gastric mucosal injury among chronic NSAID users. Methods: From January 2010 to December 2013, a total of 245 long-term NSAID (including low-dose aspirin) users who had undergone an esophagogastroduodenoscopy and had been evaluated for H. pylori infection were enrolled at Okayama University Hospital and Tsuyama Chuo Hospital. The degree of gastric mucosal injury was assessed according to the modified Lanza score (MLS). Severe gastric mucosal injury was defined as an MLS ≥4. Univariate and multivariate logistic regression analyses were performed. Results: In the univariate analysis, age ≥75 years (odds ratio [OR], 2.4; 95% confidence interval [CI], 1.3 to 4.2), H. pylori-positivity (OR, 2.0; 95% CI, 1.2 to 3.5), and the concomitant use of proton pump inhibitors (PPIs) (OR, 0.48; 95% CI, 0.26 to 0.86) were significantly associated with severe gastric mucosal injury. The multivariate analysis was adjusted by age and sex and demonstrated that H. pylori-positivity (OR, 1.8; 95% CI, 1.0 to 3.3) and the concomitant use of PPIs (OR, 0.53; 95% CI, 0.28 to 0.99) significantly contributed to severe gastric mucosal injury. Conclusions: H. pylori infection exacerbates severe gastric mucosal injury among chronic NSAID users. (Gut Liver 2016;10:69-75)