• Title, Summary, Keyword: tannins

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Pharmacognostical Study on Euphorbia ebracteolata(II) -On the chemical study of the tannins and related compounds- (Euphorbia ebracteolata에 대한 생약학적 연구(II) -Tannin 및 관련화합물에 관한 화학적 연구-)

  • Ahan, Beung-Tae;Lee, Sang-Cheol;Park, Woong-Yang;Lee, Seung-Ho;Ro, Jai-Seup;Lee, Kyong-Soon;Ryu, Eung-Kul
    • Korean Journal of Pharmacognosy
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    • v.23 no.4
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    • pp.211-217
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    • 1992
  • Seven hydrolysable tannins and two related compounds have been isolated from the acetone-water(4 : 1) soluble portion of the aerial parts of Euphorbia ebracteolata(Euphorbiaceae). Seven hydrolysable tannins have been determined as 3-O-galloyl-shikimic acid, 1, 3, 4, 6-tetra-O- and $1,\;2,\;3,\;4,\;6-penta-O-galloyl-{\beta}-D-glucose$, corilagin, tercatain, punicafolin and geraniin and two related compounds determinedasgallicacidandellagicacidonthebasisof spectral data and physico-chemical evidence.

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Characteristics of Proline-rich Salivary Proteins Induced in Rat Parotid Glands by Tannins in Bean Hull

  • Kim, Hee-Seon
    • Nutritional Sciences
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    • v.2 no.2
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    • pp.65-70
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    • 1999
  • Feeding rats a diet containing bean-hull causes hypertropy in their parotid glands due to the high tannin content. The amount of feedintake of rats led bean-hull was higher than that of rats fed a standard diet. However, the increase in body weight of rats fed bean-hull was lower than that of rats fed a standard diet, which resulted in significantly low feed efficiency of the bean-hull containing diet. Within one week, parotid glands significantly enlarged and a series of proline-rich proteins (PRPs) were produced, which were similar to those induced by feeding high-tannin sorghum with flight differences in molecular weights. Even though the direct comparison between PRPs produced by the bean-hull containing diet and those induced by the high sorghum diet is not appropriate due to laboratory inconsistences, several new PRPs were produced by high tannin diets in both experiments. Differences in molecular weights of PRPs induced in two different tannin sources must be funker investigated to be fully characterized. These morphological and biochemical changes have now been demonstrated to occur in response to the ingestion of tannins, presumably to diminish the anti-nutritional effects of tannins.

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Cytotoxic Effects of Hydrolysable Tannins from Some Euphorbia Plants on the Human Tumor Cell Lines (유포르비아속 식물로부터 단리한 가수분해형 탄닌의 인체고형암 세포에 대한 세포독성효과)

  • Lee, Seung-Ho;Park, Ji-Soo;Kim, So-Young;Chung, See-Ryun;Choi, Sang-Un
    • YAKHAK HOEJI
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    • v.41 no.4
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    • pp.524-529
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    • 1997
  • Seventy three hydrolysable tannins and related compounds were isolated from seven Euphorbia plants. Among them, 28 compounds including nine gallotannins, eleven ellagitannins and eight related compounds were selected according to the structural similarity. Cytotoxicity of them on the human tumor cell lines including A-549, SK-OV-3, SK-MEL-2, XF-498 and HCT-15 were evaluated by the SRB method in vitro. 3,4,6-Tri-O-galloyl-D-glucose was shown to exhibit most potent cytotoxic effect($4.4{\mu}g/ml).

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Effect of tannins and cellulase on growth performance, nutrients digestibility, blood profiles, intestinal morphology and carcass characteristics in Hu sheep

  • Zhao, M.D.;Di, L.F.;Tang, Z.Y.;Jiang, W.;Li, C.Y.
    • Asian-Australasian Journal of Animal Sciences
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    • v.32 no.10
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    • pp.1540-1547
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    • 2019
  • Objective: This study was conducted to evaluate the effects of tannins and cellulase on growth performance, nutrient digestibility, blood profiles, intestinal morphology, and carcass characteristics in Hu sheep. Methods: A total of 48 three-month-old meat Hu sheep ($25.05{\pm}0.9kg$) were blocked based on body weight, and randomly allotted to 4 treatments with 3 replicates of 4 sheep each. The experiment lasted for 80 d, and dietary treatments were as follows: i) CON, control diet; ii) TAN, CON+0.1% tannins; iii) CEL, CON+0.1% cellulase; iv) TAN+CEL, CON+0.1% tannins and 0.1% cellulase. Results: Compared with CON, CEL, and TAN+CEL had greater (p<0.05) final body weight (FBW) and average daily gain but lower (p<0.05) feed conversion ratio, while FBW of TAN+CEL was lower (p<0.05) than that of CEL. The apparent total tract digestibility (ATTD) of dry matter in TAN, CEL, and TAN+CEL groups were higher (p<0.05) than that in CON. CEL and TAN+CEL groups had greater (p<0.05) ATTD of crude fiber compared with TAN and CON, while TAN group had lower (p<0.05) ATTD of crude protein than other treatments. TAN, CEL, and TAN+CEL groups increased (p<0.05) serum globulin and alkaline phosphatase but decreased (p<0.05) albumin/globulin. Serum total protein was greatest for TAN+CEL, intermediate for TAN and CEL and least for CON (p<0.05). TAN+CEL group increased (p<0.05) dressing percentage compared with CON, while the backfat thickness of CEL was lower (p<0.05) than that of CON. The villus height of jejunum and ileum in CEL and TAN+CEL groups were greater (p<0.05) than that in CON, and the crypt depth and villus height: crypt depth of jejunum were increased (p<0.05) in TAN, CEL, and TAN+CEL groups. Conclusion: The addition of tannins and cellulase together promoted nutrient digestion, liver protein synthesis and intestinal development and thus improved growth performance and carcass characteristics.

Inhibitory Effects of Hydrolysable Tannins on Tyrosinase Activities in B16 Mouse Melanoma Cells

  • Cho, Soo-Min;Kwon, Young-Min;Lee, Jae-Hee;Lee, Min-Won
    • Natural Product Sciences
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    • v.8 no.4
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    • pp.183-185
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    • 2002
  • To investigate skin whitening natural substances, the effects on melanogenesis by measuring the tyrosinase activity and the melanin contents of three hydrolysable tannins, $1,2,6-tri-O-galloyl-{\beta}-D-glucose$ (1), 2,3-(S)-HHDP-D-glucose (2) and pedunculagin (3) in B16 melanoma cells were examined. $1,2,6-Tri-O-galloyl-{\beta}-D-glucose$ (1), 2,3-(S)-HHDP-D-glucose (2) and pedunculagin (3) inhibited tyrosinase activity in B16 melanoma cells in a dose-dependent manner.

목재산업 작업장의 부유분진에 관한 연구

  • 이내우;이병선
    • Proceedings of the Korean Institute of Industrial Safety Conference
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    • pp.89-92
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    • 1998
  • Tannins are complex polyphenolic substances present in plants. They may be classified as either hydrolysable or condensed tannins, and extracts of the latter type have displayed carcinogenic properties in animal studies (Hausen, 1981). The International Agency for Research on Cancer has determined that exposure to airborne wood dust, especially hardwood dust during furniture manufacture, is a cause of sino-nasal cancer, notably nasal adenocarcinoma. (omitted)

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Tannins from the Leaves of Rubus Coreanum (복분자 딸기 잎의 탄닌)

  • Kim, Min-Son;Pang, Keun-Cheol;Lee, Min-Won
    • YAKHAK HOEJI
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    • v.40 no.6
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    • pp.666-669
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    • 1996
  • Four hydrolyzable tannins were isolated from the leaves of Rubus coreanum. The structures of these compounds were elucidated as methyl gallate(1), 1(${\beta}$)-O-galloyl pedun culagin(2), sanguiin H-2(3) and sanguiin H-6(4) on the basis of physicochemical and spectroscopic evidences. These compounds were found from this plant for the first time.

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In vitro Nutrient Digestibility, Gas Production and Tannin Metabolites of Acacia nilotica Pods in Goats

  • Barman, K.;Rai, S.N.
    • Asian-Australasian Journal of Animal Sciences
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    • v.21 no.1
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    • pp.59-65
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    • 2008
  • Six total mixed rations (TMR) containing 0, 4, 6, 8, 10, 12% tannin (TMR I-VI), using Accacia nilotica pods as a source of tannin, were used to study the effect of Acacia tannin on in vitro nutrient digestibility and gas production in goats. This study also investigated the degraded products of Acacia nilotica tannin in goat rumen liquor. Degraded products of tannins were identified using high performance liquid chromatography (HPLC) at different hours of incubation. In vitro digestibility of dry matter (IVDMD) and organic matter (IVOMD) were similar in TMR II, and I, but declined (p<0.05) thereafter to a stable pattern until the concentration of tannin was raised to 10%. In vitro crude protein digestibility (IVCPD) decreased (p<0.05) with increased levels of tannins in the total mixed rations. Crude protein digestibility was much more affected than digestibility of dry matter and organic matter. In vitro gas production (IVGP) was also reduced (p<0.05) with increased levels of tannins in the TMR during the first 24 h of incubation and tended to increase (p>0.05) during 24-48 h of incubation. Gallic acid, phloroglucinol, resorcinol and catechin were identified at different hours of incubation. Phloroglucinol and catechin were the major end products of tannin degradation while gallate and resorcinol were produced in traces. It is inferred that in vitro nutrient digestibility was reduced by metabolites of Acacia nilotica tannins and ruminal microbes of goat were capable of withstanding up to 4% tannin of Acacia nilotica pods in the TMR without affecting in vitro nutrient digestibility.

Evaluation of Forest Tree Leaves of Semi-hilly Arid Region as Livestock Feed

  • Bakshi, M.P.S.;Wadhwa, M.
    • Asian-Australasian Journal of Animal Sciences
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    • v.17 no.6
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    • pp.777-783
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    • 2004
  • Samples of 13 species of forest tree leaves fed to livestock in the semi-hilly arid zone of Punjab State in India were collected at 30 d interval for 12 months, in order to assess their nutritional worth for livestock. The ground samples were pooled for 4 different seasons viz. dry hot, hot humid, fall and winter. The chemical composition irrespective of the season revealed that CP content varied between 8.9 (Carrisa) to 22.0% (Leucaena). Globulin was the major protein fraction in most of the leaves. The lowest concentration of cell wall constituents was observed in Morus alba and Grewea. The leaves in general became fiberous and lignified during winter and fall as compared to summer season. The leaves of Grewea, Morus alba, Leucaena, Carrisa and Acacia were rich in Ca, P and most of the trace elements. The total phenolics ranged between 1.88% (Azardirachta) to 15.82% (Acacia). The leaves of Acacia had the highest concentration of hydrolysable tannins (14.6%) whereas that of Carrisa had that of condensed tannins (5.9%). The condensed tannins (more than 3%) were negatively correlated to the digestibility of dry matter (DM), neutral detergent fiber (NDF) and crude protein (CP). The digestion kinetic parameters for DM, NDF and CP revealed that leaves of Morus alba, Zizyphus and Ehretia had highest insoluble but potentially degradable fraction. The minimum rumen fill values also revealed that leaves of Grewea, Azardirachta, Morus, Ehretia and Leucaena had great potential for voluntary DM intake. The leaves of Ougeinia, Malha, Dodenia and Carrisa had significantly higher rumen fill value indicating poor potential for voluntary DM intake. Season did not have any significant impact on digestion kinetic parameters except that most of the leaves had low potentially degradable fraction, which was degraded at slow rate during winter. It was concluded that the leaves of Morus, Ehretia, Grewea and Leucaena had great potential as livestock feed, while feeding of Ougeinia, Malha and Dodonea leaves should be avoided.

Evaluation of in vitro ruminal fermentation of ensiled fruit byproducts and their potential for feed use

  • Mousa, Shimaa A;Malik, Pradeep K.;Kolte, Atul P.;Bhatta, Raghavendra;Kasuga, Shigemitsu;Uyeno, Yutaka
    • Asian-Australasian Journal of Animal Sciences
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    • v.32 no.1
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    • pp.103-109
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    • 2019
  • Objective: Ensiling of tannin-rich fruit byproducts (FB) involves quantitative and qualitative changes in the tannins, which would consequently change the rumen fermentation characteristics. This study aimed to evaluate whether ensiled FBs are effective in mitigating methane emission from ruminants by conducting in vitro assessments. Methods: Fruit byproducts (grape pomace, wild grape pomace, and persimmon skin) were collected and subjected to four-week ensiling by Lactobacillus buchneri inoculant. A defined feed component with or without FB samples (both fresh and ensiled material) were subjected to in vitro anaerobic culturing using rumen fluid sampled from beef cattle, and the fermentation parameters and microbial populations were monitored. Results: Reduced methane production and a proportional change in total volatile fatty acids (especially enhanced propionate proportion) was noted in bottles containing the FBs compared with that in the control (without FB). In addition, we found lower gene copy number of archaeal 16S rRNA and considerably higher levels of one of the major fibrolytic bacteria (Fibrobacter succinogenes) in the bottles containing FBs than in the control, particularly, when it was included in a forage-based feed. However, in the following cultivation experiment, we observed that FBs failed to exhibit a significant difference in methane production with or without polyethylene glycol, implying that tannins in the FBs may not be responsible for the mitigation of methane generation. Conclusion: The results of the in vitro cultivation experiments indicated that not only the composition but also ensiling of FBs affected rumen fermentation patterns and the degree of methane generation. This is primarily because of the compositional changes in the fibrous fraction during ensiling as well as the presence of readily fermented substrates, whereas tannins in these FBs seemed to have little effect on the ruminal fermentation kinetics.