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161.
Yukio Tanabe 《General Relativity and Gravitation》1979,10(2):125-128
New solutions of the Einstein-Maxwell equations are presented. The solutions describe the gravitational fields of a massless charge. 相似文献
162.
Fujiwara Y Yoshizaki M Matsushita S Yahara S Yae E Ikeda T Ono M Nohara T 《Chemical & pharmaceutical bulletin》2005,53(5):584-585
A new pregnane glycoside has been isolated from the overripe fruits of Cherry tomato (Mini tomato), Lycopersicon esculentum var. cerasiforme (DUNAL) ALEF. The structure was determined to be 3-O-beta-lycotetraosyl 3beta-hydroxy-5alpha-pregn-16-en-20-one on the basis of spectroscopic analysis. The seasonal variation of the tomato saponin is discussed. 相似文献
163.
164.
Yukio Kōmura 《Archiv der Mathematik》1964,15(1):335-337
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167.
Tadahiro Minamikawa Seido Ogura Tetsuo Sakka Yukio Ogata Matae Iwasaki 《国际化学动力学杂志》1994,26(5):561-569
Photolysis of CClF2CH2Cl was studied by 147 nm vacuum ultraviolet irradiation. In the presence of NO; CF2CH2, CF2CHCl, and CClF2CN were produced. These products represent three different reaction paths; the molecular dechlorination, molecular dehydrochlorination, and chlorine radical elimination reactions. The reactant pressure and the addition gas (He or NO) pressure effects upon the product yield were studied. © 1994 John Wiley & Sons, Inc. 相似文献
168.
Attempts to characterize nucleic acid-silver interactions raise questions about how the free nucleic acid bases interact with silver ions in dilute aqueous solution. Studies of ultraviolet and infrared dichroism lead to the conclusion that with silver(I) ions in dilute solution adenine forms linear polymers, whereas 1-methyladenine forms dimers. The composition and structure of the complexes are further discussed against the background of the spectroscopic results. 相似文献
169.
Yujing Sun Guangpeng Ma Xingqian Ye Yukio Kakuda Ruifeng Meng 《Ultrasonics sonochemistry》2010,17(4):654-661
The effects of factors and kinetics of all-trans-β-carotene degradation under ultrasound treatment in a model system were investigated. The compounds of degradation were also tentatively identified by HPLC-DAD, Raman and FT-IR spectroscopy. The type of solvents and temperature were important factors in determining the degradation reaction. Liquid height, ultrasonic intensity and duty cycle of ultrasound exposure only affected the rate of degradation but did not change the nature of degradation. Degradation rate of β-carotene in dichloromethane was the highest. Degradation rate of β-carotene decreased with increasing of temperature. Degradation kinetics of all-trans-β-carotene under ultrasound fitted first-order reaction at ?5 to 15 °C, and fitted second-order reaction at 25 °C. Degradation products included isomers: 15-cis-β-carotene, di-cis-β-carotene and other compounds with function group of C–O. 相似文献
170.