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Volume 28, Issue 2
Displaying 51-58 of 58 articles from this issue
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TAKASHI ABIKO, IKUKO ONODERA, HIROSHI SEKINO, HIROKI HIGUCHI1980 Volume 28 Issue 2 Pages 667-669
Published: February 25, 1980
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThree peptide fragments of STF, H-Ser-Gln-Gly-Gly-Ser-Asn-OH, H-Lys-Ser-Gln-Gly-Gly-Ser-Asn-OH and H-Ala-Lys-Ser-Gln-Gly-Gly-Ser-Asn-OH, were synthesized by the solution method and their biological activities were investigated. The minimum fragment of STF able to show antagonistic action towards the E-rosette formation inhibition activity of MMS appears to be H-Lys-Ser-Gln-Gly-Gly-Ser-Asn-OH.View full abstractDownload PDF (471K) -
JUICHIRO SHIBASAKI, RYOJI KONISHI, KEIJI YAMADA1980 Volume 28 Issue 2 Pages 669-672
Published: February 25, 1980
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSA fluorometric procedure has been developed for the determination of acetaminophen and its conjugates, not only in blood plasma and serum, but also in whole blood. This method, in principle, is based on a method reported previously for the determination of acetaminophen in preparations, in which the drug is oxidized with potassium ferricyanide to give a fluorescent substance. The present method has the advantage of being able to determine the drug without hydrolysis to p-aminophenol, in contrast to many of the published methods. The detection limit is about 4μg/ml of acetaminophen in whole blood, which is comparable to that of spectrophotometric assays reported previously.View full abstractDownload PDF (548K) -
YOSHIAKI KISO, KAZUKO UKAWA, SHIZUO NAKAMURA, KAORU ITO, TADASHI AKITA1980 Volume 28 Issue 2 Pages 673-676
Published: February 25, 1980
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSA thioanisole-trifluoroacetic acid (TFA) system was found to deprotect Tyr (Bzl) quantitatively at 25°within 3 hr by a push-pull mechanism without O-to-C rearrangements. This new deblocking system did not completely deprotect Ser (Bzl) and Thr (Bzl), but deprotected Lys (Z) quantitatively.View full abstractDownload PDF (477K) -
YOSHIO SASAKI, HITOSHI TAKAI, TOSHIO TSUJIMOTO1980 Volume 28 Issue 2 Pages 677-678
Published: February 25, 1980
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESS^<13>C substituent chemical shift (S.C.S.) of the aromatic ipso- and aliphatic α- positions can be expressed by the linear combination of the substituent constants σi, σπ and the standard entropy difference ΔS°. [numerical formula] ΔS°+ and ΔS°- denote the standard entropy difference of the electron donating and electron attracting substituent groups.View full abstractDownload PDF (328K) -
MASAYOSHI ITO, AKIKO KODAMA, KIYOSHI TSUKIDA1980 Volume 28 Issue 2 Pages 679-681
Published: February 25, 1980
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSThe title compound (3) which involves a new conjugated system, has been synthesised in a geometrically pure form the indanone (4).View full abstractDownload PDF (427K) -
HIDEJI ITOKAWA, KINZO WATANABE, SUSUMU MIHASHI, YOICHI IITAKA1980 Volume 28 Issue 2 Pages 681-682
Published: February 25, 1980
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSA new sesquiterpene, 3α, 4α-oxidoagarofuran (2) was isolated besides 4-hydroxydihydroagarofuran (1), α-agarofuran (3) and β-eudesmol (4) from the rhizomes of Alpinia japonica. Biogenetically, it is interesting that β-eduesmol is isolated from same plant together with agarofurans, which possess 10-epimeric eudesmane carbon skeleton.View full abstractDownload PDF (335K) -
HIROTERU SAYO, MIKIO HOSOKAWA1980 Volume 28 Issue 2 Pages 683-685
Published: February 25, 1980
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSCumene hydroperoxide-supported N-demethylation of aminopyrine catalyzed by catalase has been investigated. The transient free radical of aminopyrine was detected by electron spin resonance at room temperature. When cumene hydroperoxide was previously added to the catalase solution, the rate of the reaction and the concentration of the radical were very low. On the other hand, cumene hydroperoxide did not inhibit the catalase-catalyzed decomposition of hydrogen peroxide. On the contrary, sodium azide significantly inhibited the latter reaction and only slightly inhibited the former reaction. Methanol was not oxidized in the catalase-cumene hydroperoxide system. These results suggest that the active site of catalase for the cumene hydroperoxide-supported N-demethylation of aminopyrine is different from that for the decomposition of hydrogen peroxide.View full abstractDownload PDF (431K) -
GEN-ICHIRO NONAKA, MISAKO HARADA, ITSUO NISHIOKA1980 Volume 28 Issue 2 Pages 685-687
Published: February 25, 1980
Released on J-STAGE: March 31, 2008
JOURNAL FREE ACCESSA new ellagitannin, eugeniin was isolated from cloves, the dried flower buds of Eugenia caryophyllata THUNB., and the structure was determined to be 1, 2, 3-trigalloyl 4, 6-hexahydroxydiphenoyl β-D-glucopyranose.View full abstractDownload PDF (355K)