巻号一覧
9 巻 (1995)
- 4 号 p. 304-
- 2 号 p. 77-
- 1 号 p. 3-
9 巻, 2 号
選択された号の論文の3件中1～3を表示しています
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Monika Fejtek, Michel Delorme, Richard Wassersug1995 年 9 巻 2 号 p. 77-81
発行日: 1995年
公開日: 2006/02/01
ジャーナル フリーAs part of an ongoing survey of the behavioral responses of vertebrates to abrupt changes in gravity, we report here on the reactions of bats (Carollia perspicillata) exposed to altered gravity during parabolic aircraft flight. In microgravity, mammals typically behave as if they were upside-down and exhibit repetitive righting reflexes, which often lead to long axis rolling. Since bats, however, normally rest upside-down, we hypothesized that they would not roll in microgravity. Only one of three specimens attempted to fly during microgravity. None rolled or performed any righting maneuvers. During periods of microgravity the bats partially extended their forearms but kept their wings folded and parallel to the body. Between parabolas and occasionally during microgravity the bats groomed themselves. Both the extended limbs and autogrooming may be stress responses to the novel stimulus of altered gravity. This is the first behavioral record of Chiroptera in microgravity.抄録全体を表示PDF形式でダウンロード (1246K) -
Kohtaro Kawashima, Akira Yamaguchi, Toshimasa Shinki, Sumihare Noji, S ...1995 年 9 巻 2 号 p. 82-94
発行日: 1995年
公開日: 2006/02/01
ジャーナル フリーSeven days' space flight of fertilized chicken eggs pre- incubated for 7 and 10 days on earth caused no differences in the morphology of osteoblasts, osteoclasts, and osteocytes of humerus and tibia from those of control embryos. Bone-resorbing and -forming activities of the femur were not different between control and flight groups. As a consequence, calcium and phosphorus contents of the femora between control and flight groups were not changed. Alkaline phosphatase activity of 3 different regions (resting cartilage, growth cartilage, and cortical bone) of tibia showed no significant difference between control and flight groups. No significant difference of gene expressions of hepatocyte growth factor and receptors of fibroblast growth factor was observed in perichondrium, trabecula, and skeletal muscles and tendons of hind limbs between control and flight groups. Unlike the results of previous space flight experiments in which young growing mammals were used, these morphological and biochemical results indicate that microgravity has little effect on bone metabolism of the chick embryo.抄録全体を表示PDF形式でダウンロード (5319K) -
柴籐 洋二1995 年 9 巻 2 号 p. 95-105
発行日: 1995年
公開日: 2006/02/01
ジャーナル フリーThe development program of the H-II rocket has been initiated in 1985. The H-II rocket is a new expendable launch vehicle to meet a demand of space activities in the 1990's. With the successful development if the N rocket family,, Japan has established the technology for launching satellite into Geostationary Earth Orbit (GEO). The National Space Development Agency of Japan(NASDA) has made a major effort to obtain a heavier launch vehicle, capable of meeting the increasing needs of GEO mission. Following the II 1 rocket capable of carrying a 550 kilogram satellite into GEO and ready for a first launch in August 1986, a new launch vehicle called the H-II rocket is being planned to carry a 2 ton satellite into GEO and to be most cost effective per payload ton into GEO. This launch vehicle is of 100 percent domestic design and Japan will be able to have an independent and competitive capability in the field of space transportation systems. First launch of the H-II rocket was performed successfully in February 1994. After that, second and third H-II rocket were launched in august 1994 and march 1995.抄録全体を表示PDF形式でダウンロード (5911K)
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