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2. Chitinimonas taiwanensis gen. nov., sp. nov., a Novel Chitinolytic Bacterium Isolated from a Freshwater Pond for Shrimp Culture.

Author

Shu-Chen Chang, Jih-Terng Wang, Peter Vandamme, Jie-Horng Hwang, Poh-Shing Chang, and Wen-Ming Chen

Subjects
GRAM-negative bacteria, MACROBRACHIUM rosenbergii, SHRIMP fisheries, SHRIMPS, BACTERIA, CLADISTIC analysis
Abstract

A bacterial strain, designated cfT was isolated from surface water of a freshwater pond for shrimp (Macrobrachium rosenbergii) culture at Ping-Tung (Southern Taiwan). Cells of this organism were Gram-negative, slightly curved rods which were motile by means of a single polar flagellum. Strain cfT utilized chitin as the exclusive carbon, nitrogen, and energy source for growth, both under aerobic and anaerobic conditions. Optimum conditions for growth were between 25 and 37 °C, 0 and 1% NaCl and pH 6 to 8. Strain cfT secreted two chitinolytic enzymes with approximate molecular weight 52 and 64 kDa, which hydrolyzed chitin to produce chitotriose as major product. Sequence comparison of an almost complete 16S rDNA gene showed less than 92% sequence similarity with known bacterial species. Phylogenetic analysis based on the neighbour-joining and other methods indicated that the organism formed a distinct lineage within the β-subclass of Proteobacteria. The predominant cellular fatty acids of strain cfT were hexadecanoic acid (about 29%), octadecenoic acid (about 12%) and summed feature 3 (16:1 ω7c or 15 iso 2-OH or both [about 49%]). Its DNA base ratio was 62.8 mol% G+C. We propose to classify strain cfT (= CCRC 17210T = LMG 22011T) as Chitinimonas taiwanensis gen. nov., sp. nov. [ABSTRACT FROM AUTHOR]

Published
2004
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4. Assessment of various display devices on a virtual reality-based hand rehabilitation system

Author

Huang, Wei-Shin, Shing, Chang-Yih, Fung, Chin-Ping, Chuang, Tien-Yow, Jeng, Ming-Chang, and Doong, Ji-Liang

Abstract

The purpose of the present study is to assess the effect of an auxiliary lateral image and display devices on manipulation performance in a virtual reality-based hand rehabilitation system. The system consists of a personal computer, a tracker, a data glove, and a display device. For this study, a projector, a monitor, and a head-mounted display were respectively used as the display devices to present three-dimensional virtual environments. Twelve volunteers were recruited to take a pick-and-place procedure at different levels of difficulty. Task time and collision frequency were the parameters used to evaluate the manipulation performance. It was found that the presence of an auxiliary lateral image was a significant factor only for the performance of the projector group and the monitor group. In addition, no statistically significant difference was found in the comparison between the projector group and the monitor group.

Published
2004

5. The study of auditory and haptic signals in a virtual reality-based hand rehabilitation system

Author

Shing, Chang-Yih, Fung, Chin-Ping, Chuang, Tien-Yow, Penn, I-Wen, and Doong, Ji-Liang

Abstract

The purpose of the present study is to assess the influence of auditory and haptic signals on the manipulation performance in a virtual reality-based hand rehabilitation system. A personal computer, a tracker, and a data glove were included in this system. Three-dimensional virtual environments were developed. Forty volunteers were recruited to participate in a pick-and-place procedure, with three levels of difficulty and four feedback modes. Task time and collision frequency were the parameters used to evaluate their manipulation performance. It can be concluded that the haptics is a significant signal for improving a subject's performance at the high difficulty level.

Published
2003

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