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CARCINOGENICITY OF BRACKEN FERN IN ACI/N RATS
Kodama, Yukio,Sakai, Takeo,Yoon, Chong Sam,Horiuch, Shigetomo,Naito, Katsushi,Natori, Shisaku,Lee, Won Chang 대한보건협회 1990 대한보건연구 Vol.16 No.1
As part of a study to evaluate the caroinogenicity of bracken fern, we have prepared a freeze-dried extract of bracken fern(FDE-BF), spray-dried extract bracken fern(SDE-BF), or have used unprocessed bracken fern(UP-BF) and have mixed each with rat food and have fed these 3 separate diets to separate groups of rats(6 animals per group) for 27 weeks. After 27 weeks, all of these rats then were given basic diet without bracken fern or its extract and sacrificed after the 52nd week and examined. In group FDE-BF and SDE-BF, body weight gain were inhibited, and one rat in each of these two groups developed transitional cell carcinoma of urinary bladder. In group UP-BF, most rats died during the experimental period, and a transitional cell carcinoma, an adenocarcinoma of small intestine, and an adenocarcinoma of large intestine were observed in one rat and an adenocarcinoma of small intestine in each of 3 other rats of this group. Thus, the incidence of carcinoma was found to be markedly lower in Groups FDE-BF and SDE-BF than in Group UP-BF, indicating that the carcinogenicity of the unprocessed bracken fern to be more greater.
BBISS(Broad Band Internet Service via Satellite)Ka-band Broadband Satellite Plan
Tatsukawa, Kenichi,Akinaga, Wakoto,Yamada, Kenichi,Hashimoto, Katsumasa,Okui, Tamio,Koishi, Yoichi,Horiuch, Yasuo 통신위성우주산업연구회 2004 Joint Conference on Satellite Communications Vol.2004 No.-
Broadband internet, by ADSL, fiber optic, and CATV circuit has become very popular. However this service can not be shared in the depopulated area, where Broadband service business is difficult to materialize. BBISS satellite has been planned to provide the Broadband service to these un-equipped areas. In order to do so, a wide Ka frequency band is utilized and moreover, multi-beam antenna is adopted to realize the improvement of the efficient frequency reuse and to succeed in earth station antenna miniaturization. As for the problematic matter in use of the Ka-band due to great rainfall attenuation will be solved by use of adaptive code modulation method and realize high availability, and high=speed information speed will be provided in case of fine weather by maintaining the necessary minimum margin. This paper introduces best effort service by BBISS with such features.