http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
Yamagishi, Mitsuyoshi,Kaneda, Hidehiro,Ishihara, Daisuke,Oyabu, Shinki,Onaka, Takashi,Shimonishi, Takashi,Suzuki, Toyoaki,Minh, Young Chol IOP Publishing 2013 ASTROPHYSICAL JOURNAL LETTERS - Vol.773 No.2
<P>With AKARI, we obtain the spatially resolved near-infrared (NIR) (2.5-5.0 mu m) spectra for the nearby starburst galaxy M 82. These spectra clearly show absorption features due to interstellar ices. Based on the spectra, we created the column density maps of H2O and CO2 ices. As a result, we find that the spatial distribution of H2O ice is significantly different from that of CO2 ice; H2O ice is widely distributed, while CO2 ice is concentrated near the galactic center. Our result reveals for the first time variations in CO2/H2O ice abundance ratio on a galactic scale, suggesting that an ice-forming interstellar environment changes within a galaxy. We discuss the cause of the spatial variations in the ice abundance ratio, utilizing spectral information on the hydrogen recombination Br alpha and Br beta lines and the polycyclic aromatic hydrocarbon 3.3 mu m emission appearing in the AKARI NIR spectra.</P>
Development of new products derived from research on functional constituents in plants
Takashi Yamagishi 한국작물학회 2007 한국작물학회 학술발표대회 논문집 Vol.2007 No.11
New food material "Rosa rugosa petal" with strong anti-oxidant activity We have recognized that administration of the flower of R. rugosa reduced the odor of mouse's feces. Thus, we supposed that it must be effective for human, and the effect was proved by the experiments of volunteer. Moreover, it was proved to be effective for aging odor of human. The effects must be due to anti-oxidative activities of R. rugosa. Ear wax was collected from volunteer, 50 year old or more, and the ether extract of the wax was analyzed by GC-MS for detection of 2-nonenal. 2-Nonenal was detected in the ear wax of few volunteers, but the administration of 2 capsules containing 100mg of R. rugosa per day reduced the 2-nonenal under detection limit. These results were patented in Japan(JP No.4008369), and a new company, Harunire bio laboratory Co., was established in Kitami Institute of Technology in 2003 for development of new products. The active constituents in R. rugosa supposed to be polyphenols, hydrolysable tannnins, such as rugosin A, tellimagrandin, and the contents of these polyphenols exceed more than 20% in dry flower of R. rugosa. The flower of R. rugosa was also shown to inhibit many enzymes, such as α-amylase and α-glucosidase, and prevent intestinal disorder. Various physiological activities are evaluated using isolated polyphenols now. Product development of new functional foods from onion (Sun Onion) The amount of onion production in the Abashiri-Kitami area is about 30% of Japan. Thus, the research for development of functional foods using onion was started for the increment of onion consumption. The following new results were obtained (JP No.3697524). The flavonoids in the juice and the squeezing residue resulted in process of onion juice manufacture were analyzed, and large amount of quercetin and its glycosides were shown to remained in the squeezing residue. The amounts of flavonoids in the residue are 5-10 times of those in the juice. Moreover, the squeezing residue contains insoluble dietary fibers, and it must be expected to improve of intestinal disorders. The irradiation of light (2500lux) on onion in artificial weather machine increased the amount of quercetin eight times. Thus, the new food material using the squeezing residue after the irradiation of sunlight, stronger than artificial light was developed. The amount of flavonoid (total quercetin) was shown to exceed 800mg/100g, and the amount of the pectin was about 10g/100g, these contents were extremely higher than those without irradiation. Moreover, α-glucosidase inhibitor was isolated from onion irradiated by sunlight, and the activity of irradiated onion was shown to be twice of that of without irradiation. Breeding of new onion rich in functional constituents We analyzed flavonoids by HPLC in 15 kinds of onions cultivated in Hokkaido Kitami Agricultural Experiment Station, and 15 kinds onions cultivated in Sapporo Agricultural Experiment Station. Total flavonoids contents of edible part of these onions were 24~293mg/100g, and those in outer peel were 265~5,613mg/100g. The onion breed with high flavonoids contents was discovered. The cultivation characteristic and the processing characteristic are now under investigation. In a human clinical trial, the R. rugosa petal was proven to decreased neutral fat (triglycerides). The R. rugosa petal must to be commercialized as the functional food and cosmetic product. In the case of sunlight onion, applications for vegetable juice and function food are under investigation.
STUDY OF CO2/H2O ICE ABUNDANCE RATIOS IN NEARBY GALAXIES WITH THE AKARI NEAR-INFRARED SPECTROSCOPY
MITSUYOSHI YAMAGISHI,HIDEHIRO KANEDA,SHINKI OYABU,DAISUKE ISHIHARA,TAKASHI ONAKA,TAKASHI SHIMONISHI,Toyoaki Suzuki 한국천문학회 2017 天文學論叢 Vol.32 No.1
We study $\mathrm{CO_2/H_2O}$ ice abundance ratios in nearby galaxies using $AKARI$ near-infrared slit spectroscopy. Past studies of the ices intensively examined $\mathrm{CO_2/H_2O}$ ratios mainly in our Galaxy, and found that there were considerable variations in the $\mathrm{CO_2/H_2O}$ ratios from object to object. The cause of the variations is, however, still under debate. As a result of the analysis of our sample that includes 1031 regions in 158 galaxies, the $\mathrm{CO_2/H_2O}$ ratios are in a range of 0.05--0.30. In the dataset, we find that the $\mathrm{CO_2/H_2O}$ ratios positively correlate with the Br$\alpha$/PAH 3.3 $\mu$m ratios which reflect the massive star formation activity. Furthermore, we find that the $\mathrm{CO_2/H_2O}$ ratios positively correlate with the specific star formation rates of the galaxies where the ices are detected, that reflect the evolutionary stage of a galaxy. These results suggest that the $\mathrm{CO_2/H_2O}$ ratios are enhanced in active star-forming regions and young galaxies.
Kohtaroh Shutoh,Takashi Yamanouchi,Syou Kato,Hiroki Yamagishi,Yusuke Ueno,Shiori Hiramatsu,Jun Nishihiro,Takashi shiga 국립중앙과학관 2019 Journal of Asia-Pacific Biodiversity Vol.12 No.3
A small semiartificial pond, revealing high species richness with respect to the aquatic macrophytes, was studied in the Aomori Prefecture, Japan. The pond had been completely formed ca. 10 years previously after excavation into a wet bog. To identify and evaluate its aquatic macrophyte flora during 2017–2018, we listed the species of aquatic vascular plants and charophytes in the pond and compared this list with those from the natural Japanese lakes using a database of aquatic flora in Japan. Two species were identified by molecular analyses because they lacked any reproductive organs, which were necessary for identifying the species level. We found a total of 57 taxa of aquatic macrophytes including 15 Red List species in Japan or Aomori Prefecture. Comparing the flora list with those from the 66 natural Japanese lakes surveyed since 2001, the pond was ranked fourth in the order of diversity (based on species richness) and rarity (based on numbers of Red List species). Therefore, the pond is an important aquatic environment in terms of aquatic macrophyte conservation in Japan. Interestingly, for a pond with such high species diversity, it is relatively small (0.14 km2), semiartificial, and relatively recently formed.
ICE ABSORPTION FEATURES IN NIR SPECTRA OF GALACTIC OBJECTS
TAMAMI I. MORI,TAKASHI ONAKA,ITSUKI SAKON,RYOU OHSAWA,HIDEHIRO KANEDA,MITSUYOSHI YAMAGISHI,YOKO OKADA,MASAHIRO TANAKA,TAKASHI SHIMONISHI 한국천문학회 2017 天文學論叢 Vol.32 No.1
We present results of AKARI/IRC near-infrared (NIR) slit-spectroscopy (2.5--5.0\,$\mu$m, $R \sim 100$) of Galactic sources,focusing on ice absorption features. We investigate the abundance of H$_2$O and CO$_2$ ices and other ice species (CO and XCN ices)along lines of sight towards Galactic \ion{H}{ii} regions, massive YSOs, and infrared diffuse sources. Even among those different kinds of astronomical objects,the abundance ratio of CO$_2$ to H$_2$O ices does not vary significantly,suggesting that the pathway to CO$_2$ ice formation driven by UV irradiation is not effectiveat least among the present targets.
DEVELOPMENT OF NEW STITCHING INTERFEROMETRY FOR THE SPICA TELESCOPE
Asa Yamanaka,HIDEHIRO KANEDA,MITSUYOSHI YAMAGISHI,TORU KONDO,Takuma Kokusho,Kotomi Tanaka,Misaki Hanaoka,TAKAO NAKAGAWA,Mitsunobu Kawada,Naoki Isobe,Toshiaki Arai,TAKASHI ONAKA 한국천문학회 2017 天文學論叢 Vol.32 No.1
The telescope to be onboard SPICA (Space Infrared Telescope for Cosmology and Astrophysics) has an aperture diameter of 2.5 m and its imaging performance is to be diffraction-limited at a wavelength of 20 μm at the operating temperature of < 8 K. Because manufacturing precise autocollimating flat mirrors (ACFs) with sizes comparable to the SPICA telescope is not technically feasible, we plan to use sub-aperture stitching interferometry through ACFs for optical testing of the telescope. We have verified the applicability of the sub-aperture stitching technique to the SPICA telescope by performing stitching experiments in a vacuum at a room temperature, using the 800-mm telescope and a 300-mm ACF. We have also developed a new method to reduce uncertainties possibly caused by cryogenic and gravitational deformations of ACFs.