Search Results:　 1-20 of 46

1

Scavenging Effects of Metal Complexes of Water-Soluble Thiacalix[4]arenetetrasulfonate on Superoxide Anion Radicals

Odo Junichi , Kimura Ayumi , Matsu-ura Atsushi , Ohnishi Yuki , Saeki Yoshiro , Yoshida Akiko , Hayashi Ken-ichiro , Inoguchi Masahiko , Ueki Takahiko

… The IC50 values of Fe3+- and Mn3+-TCAS[4] for O2－ scavenging activity were estimated to be 5.3 and 7.8 μM, respectively, and were almost the same as those of tannin acid, catechin and their derivatives, which are known as very effective scavengers of O2－. … Each activity of Me-TCAS[4] (Me=Fe3+, Mn3+, Mn2+, Cu2+, and Zn2+) was higher than that of the corresponding metal ion, indicating that H2-TCAS[4] has the ability to raise the activity of the metal ion itself by forming a complex. …

Chemical and Pharmaceutical Bulletin 58(12), 1576-1581, 2010

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2

Chemical Studies on Plant Polyphenols and Formation of Black Tea Polyphenols [in Japanese]

TANAKA Takashi

… Four tea catechins of fresh tea leaves are enzymatically oxidized in tea fermentation process of black tea manufacture to give a complex mixture of the oxidation products. … The oxidation was initiated by enzymatic dehydrogenation of catechins, and subsequent intermolecular quinone-phenol coupling reactions followed by cascade-type degradation of the unstable products resulted in the formation of complex black tea polyphenols. …

Journal of the Pharmaceutical Society of Japan 128(8), 1119-1131, 2008-08-01

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3

Cowaniin, a C-Glucosidic Ellagitannin Dimer Linked through Catechin from Cowania mexicana

ITO Hideyuki , MIYAKE Masateru , NISHITANI Eisei , MIYASHITA Kyoko , YOSHIMURA Morio , YOSHIDA Takashi , TAKASAKI Midori , KONOSHIMA Takao , KOZUKA Mutsuo , HATANO Tsutomu

… A new complex tannin, cowaniin (1) was isolated from the leaves and stems of Cowania mexicana (Rosaceae), and its structure was characterized as novel C-glucosidic tannin dimer linked through (+)-catechin on the basis of spectral and chemical evidence. …

Chemical & pharmaceutical bulletin 55(3), 492-494, 2007-03-01

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4

Evaluation of Compatibility of Risperidone with Soft Drinks and Interactions of Risperidone with Tea Tannin using Isothermal Titration Microcalorimetry [in Japanese]

Aki Hatsumi , Ohta Masaaki , Fukusumi Kanji , Okamoto Yasuhiro

… Compatibility between risperidone and soft drinks was examined by means of isothermal titration microcalorimetry, and the interaction of risperidone with tea tannin-(-)-epigallocatechin, (-)-epicatechin, theaflavin and their gallates-was investigated thermodynamically. … Risperidone exothermically bound to tea tannin monomers with a binding affinity of 10^3-10^4M^<-1> … in aqueous solution to form an insoluble complex at a 1:1 molar ratio. …

Japanese journal of pharmaceutical health care and sciences 32(3), 190-198, 2006-03-10

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5

Deceptive Halo Formation by Tannase-Defective Bacteria on Tannin-Treated Plate Media

NISHITANI YOSUKE , OSAWA RO

… Some bacterial strains that did not have tannase activity formed vague halos around their colonies on tannin-treated media. … These halos were due to alkaline dissociation of the tannin-protein complex of the media during bacterial growth. …

Microbes and environments 20(2), 117-119, 2005-06-00

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6

Mechanism of Hexavalent Chromium Adsorption by Persimmon Tannin Gel

NAKAJIMA A. , Baba Yoshinari

… http://www.elsevier.com/wps/find/journaldescription.cws_home/309/descriptionMechanism of chromium adsorption by the persimmon tannin (PT) gel was examined. … Through the treatment of a Cr(VI) solution with the PT gel, chromium should be recovered as a Cr(IV)-tannin complex at pH 3 or a Cr(III) solution at pH 1 or lower pH region. …

Water Res. 38(12), 2859-2864, 2004-07-00

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7

Naturaly Occurring Nanomolecules, Tannins : Their Structures and Functions [in Japanese]

YOSHIDA Takashi , HATANO Tsutomu , ITO Hideyuki

… Among them are polyphenols classified as tannins which have large molecular weights ranging from 500 to 4000, and strong affinity to proteins, alkaloids and heavy metals to form complex molecules (precipitates). … Formation of insoluble and soluble complex between tannins and proteins are also described. …

Journal of Synthetic Organic Chemistry, Japan 62(5), 500-507, 2004-05-01

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8

Preparation and Functional Evaluation of Anthocyanin-soybean protein Complex [in Japanese]

HUANG Su Mei , TANAKA Norie , ISHIMARU Kanji

… The maximum concentration of anthocyanin (0.23% dry weight as cyanidin equivalent) was observed in the complex prepared from black soybean. … The largest radical-scavenging activity was observed in the complex prepared from the extract from red leaves of Sapium sebiferum. … The highest radical-scavenging activity was presumed to be originated from tannin constituents (geraniin and chebulagic acid) as well as anthocyanin. …

NIPPON SHOKUHIN KAGAKU KOGAKU KAISHI 51(1), 18-22, 2004-01-15

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9

Effects of Human Saliva on the Formation of Calcium Phosphate Precipitates in the Presence of Glycyrrhiza and Tannic Acid

Hidaka Saburo

Japanese journal of oral biology 45(2), 64-68, 2003-04-20

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10

Termite resistance and wood-penetrability of chemically modified tannin and tannin-copper complexes as wood preservatives

YAMAGUCHI Haruhiko , YOSHINO Kyoko , KIDO Akiko

Journal of Wood Science 48(4), 331-337, 2002-08-25

References (6) Cited by (1)
11

Electron Spin Resonance Study on the Vanadium Adsorption by Persimmon Tannin Gel

NAKAJIMA A.

… http://www.elsevier.com/wps/find/journaldescription.cws_home/525438/descriptionThe persimmon tannin gel can adsorb vanadium highly effectively from aqueoussolutions containing VOCl2 and NH4VO3, respectively. …

Talanta 57(3), 537-544, 2002-05-24

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12

Inhibitory Effects of Ellagi- and Gallotannins on Rat Intestinal α-Glucosidase Complexes

TODA Miou , KAWABATA Jun , KASAI Takanori

… After separation of maltase-glucoamylase and sucrase-isomaltase complexes from the crude mixture of the rat α-glucosidases, the inhibitory activities of the galloylglucose derivatives against each complex were examined. … The inhibitory influence on the maltase-glucoamylase complex was more potent than on the sucrase-isomaltase complex. …

Bioscience, biotechnology, and biochemistry 65(3), 542-547, 2001-03-23

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13

Effects of pH and Light on the Storage Stability of the Purple Pigment, Hordeumin, from Uncooked Barley Bran Fermented Broth

DEGUCHI Tomoaki , SHOHARA Shuji , OHBA Riichiro , UEDA Seinosuke

… We considered that the storage stability of hordeumin is higher than standard anthocyanidins because hordeumin is a complex with anthocyanin, tannin, and protein. …

Bioscience, biotechnology, and biochemistry 64(10), 2236-2239, 2000-10-23

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14

Inhibitory Effects of Tannins on the NADH Dehydrogenase Activity of Bovine Heart Mitochondrial Complex I

KONISHI Kiyoshi , TANAKA Takashi

… Animal mitochondrial complex I is an NDH-1 type enzyme. … We have now examined detailed inhibitory effects of three tannins (pentagalloylglucose, sanguiin H-11,and oolonghomobisflavan A) on NDH-1 using bovine heart mitochondrial complex I and a subcomplex flavoprotein (containing 3 subunits) derived from complex I. … NADH-ubiquinone-1 oxidoreductase activity of complex I was inhibited by the three tannins, among which sanguiin H-11 was the most potent inhibitor. …

Biological & pharmaceutical bulletin 22(3), 240-243, 1999-03-15

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15

Tannins of Stachyurus Species. III. Stachyuranins A, B and C, Three New Complex Tannins from Stachyurus praecox Leaves

HAN Li , HATANO Tsutomu , OKUDA Takuo , YOSHIDA Takashi

… Three new complex tannins, stachyuranins A (1), B (2) and C (3), were isolated from the leaves of Stachyurus praecox (Stachyuraceae), and their structures, each consisting of a catechin or gallocatechin residue and a monomeric hydrolyzable tannin moiety, were assigned. … Structures 1 and 2 lack a C-C linkage between glucose C-1 and the aroyl group at glucose O-2,suggesting that they may be biogenetic precursors of complex tannins with the C-C linkage. …

Chemical & pharmaceutical bulletin 43(12), 2109-2114, 1995-12-15

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16

CAMELLIATANNIN D, A NEW INHIBITOR OF BONE RESORPTION, FROM CAMELLIA JAPONICA

HATANO Tsutomu , HAN Li , TANIGUCHI Shoko , OKUDA Takuo , KISO Yoshinobu , TANAKA Takaharu , YOSHIDA Takashi

… Camelliatannin D (1), a new complex tannin which inhibits Ca release from mouse calvaria, was isolated from the leaves and fruits of Camellia japonica L. … This tannin is the first example of complex tannin composed of a dimeric hydrolyzable tannin and a flavan-3-ol. …

Chemical & pharmaceutical bulletin 43(11), 2033-2035, 1995-11-15

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17

An Investigation of Gram-Negative Tannin-Protein Complex Degrading Bacteria in Fecal Flora of Various Mammals

NEMOTO Ken , OSAWA Ro , HIROTA Katsuhiko , ONO Tsuneko , MIYAKE Yoichiro

… 食性 (草食, 肉食, 雑食) の異なる15種の哺乳動物の糞便から Tannin-Protein Complex Degrading Bacteria (T-PCDB) の分離を試みたところ, 初めてコアラ以外の動物からグラム陰性T-PCDBが分離された. …

The journal of veterinary medical science 57(5), 921-926, 1995-10-15

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18

Tannins and Related Polyphenols of Theaceous Plants. VIII. Camelliatannins C and E, New Complex Tannins from Camellia japonica Leaves

HATANO Tsutomu , HAN Li , TANIGUCHI Shoko , SHINGU Tetsuro , OKUDA Takuo , YOSHIDA Takashi

… They were found to be complex tannins of a new type, lacking C-C bond between glucose C-1 and the aroyl (hyxahydroxydiphenoyl) group at glucose O-2. …

Chemical & pharmaceutical bulletin 43(10), 1629-1633, 1995-10-15

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19

Biochemical and Antigenical Characterization of Tannin-Protein Complex Degrading Enterobacteria Isolated from Koalas, Phascolarctos cinereus

NAKAI Yutaka , NIIMI Masashi , KANAI Tomonori , OSAWA Ro , INAMOTO Tamio , ANDO Tasuke , OGIMOTO Keiji

コアラPhascolarctos cinereusから分離されたタンニン・タンパク質複合体分解機能を有する腸内細菌(T-PCDE)について生化学的性状および抗原性状の解析を行った. T-PCDEは生化学的性状および抗原性状のいずれにおいても比較に用いた12種のEntero-bacteriaceaeの標準株とは明らかに異なるプロファイルを示した.

The journal of veterinary medical science 57(3), 559-561, 1995-06-15

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20

Tannins of Theaceous Plants. V. Camelliatannins F, G and H, Three New Tannins from Camellia japonica L.

HAN Li , HATANO Tsutomu , YOSHIDA Takashi , OKUDA Takuo

… Two new complex tannins, camelliatannins F (3) and G (4), were isolated from the leaves of Camellia japonica L. … A new dimeric hydrolyzable tannin, named camelliatannin H (5), was isolated from the fruits of this plant. …

Chemical & pharmaceutical bulletin 42(7), 1399-1409, 1994-07-15

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