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Journal articles on the topic 'Condensed tannins'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Mahdi Haroun, Inas Osman Khojali, and Manal Mohammed Ahmed. "Analyzing vegetable tannins: Incorporating ultraviolet spectroscopy and hide powder techniques." World Journal of Advanced Engineering Technology and Sciences 9, no. 1 (2023): 089–95. http://dx.doi.org/10.30574/wjaets.2023.9.1.0146.

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The ultraviolet technique, known for its speed and cleanliness, proved to be highly advantageous in this study. It requires no reagents or pretreatment of the samples, making it a convenient method for analyzing different commercial vegetable tannins. By employing ultraviolet spectroscopy and Hide Powder techniques, valuable insights into the primary absorption bands were obtained, providing information about the chemical composition and structure of the extracts. In addition, specific absorptivity was determined, and the total polyphenols and tannin content of each extract were quantified usi

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2

Sasongko, Wahidin Teguh, Lies Mira Yusiati, Zaenal Bachruddin, and Mugiono (Mugiono). "Optimalisasi Pengikatan Tanin Daun Nangka dengan Protein Bovine Serum Albumin (Optimalisation Binding of Jackfruit Leaves Tannin with Bovine Serum Albumin Protein)." Buletin Peternakan 34, no. 3 (2012): 154. http://dx.doi.org/10.21059/buletinpeternak.v34i3.84.

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<p>Tannins are high molecular weight polyphenol compounds with ability to bind proteins. Based on the structure,<br />albumin are simple globular molecule protein. Optimalisation binding of jackfruit leave tannins to bovine serum (BSA)<br />albumin was done in two stages. The first stage was to determine levels of tannins and condensed tannins in jackfruit leaves grown in mediterranean soil types. Second research was optimalisation binding of jackfruit leaf tannins with<br />bovine serum albumin. In the second stage there was the determination of protein-percipitable ph

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Madritch, Michael D., Lisa M. Jordan, and Richard L. Lindroth. "Interactive effects of condensed tannin and cellulose additions on soil respiration." Canadian Journal of Forest Research 37, no. 10 (2007): 2063–67. http://dx.doi.org/10.1139/x07-047.

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Plant polyphenolics are receiving increased attention for their influences on belowground processes. Tannins are of particular interest because of their predominance in natural systems, their wide variation in both quality and quantity, and their protein-binding abilities. Current theory holds that simple phenolics increase microbial activity by acting as carbon substrates, while larger tannins decrease microbial activity by binding with organic nitrogen such as proteins. Here, we present results from a simple microcosm experiment that demonstrates that the influence of condensed tannins on so

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Van Cleef, Flávia, and Jose Dubeux. "Condensed Tannins in Forage Legumes." EDIS 2020, no. 1 (2020): 4. http://dx.doi.org/10.32473/edis-ag440-2019.

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       The use of tannin-containing forages has received attention from researchers around the globe because of potential benefits of condensed tannins to livestock health and nutrition as well as possibilities to reduce methane emission. This new 4-page publication of the UF/IFAS Agronomy Department targets two audiences: Extension faculty who need information on potential benefits and negative effects of condensed tannins to livestock production, and producers who intend to feed tannin-containing forages in their operation. Written by Flavia van Clee

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González-Coloma, Azucena, Charles S. Wisdom, and Philip W. Rundel. "Effect of Different Condensed Tannins on Trichoplusia ni Performance." Zeitschrift für Naturforschung C 48, no. 9-10 (1993): 722–26. http://dx.doi.org/10.1515/znc-1993-9-1007.

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Abstract To examine the assumption that condensed tannins exhibit uniform activity against herbivores, tannins extracted from four plant species with different in vitro protein binding abilities were fed to larvae of Trichoplusia ni in artificial diets. Larvae were measured for survivorship, growth and food consumption at three tannin concentrations (0.001%, 0.01% and 0.05% w. wt.). Larval performance was negatively affected by the tannins tested in a dose-response fashion, giving the different plant-derived tannins different activity thresholds. We did not find any significant correlation bet

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McAllister, T. A., H. D. Bae, L. J. Yanke, K. J. Cheng, and A. Muir. "Effect of condensed tannins from birdsfoot trefoil on endoglucanase activity and the digestion of cellulose filter paper by ruminal fungi." Canadian Journal of Microbiology 40, no. 4 (1994): 298–305. http://dx.doi.org/10.1139/m94-048.

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The ruminal fungi Neocallimastix frontalis RE1, Neocallimastix patriciarum 27, Piromyces communis 22, and Orpinomyces joyonii 19-2 were examined for their ability to digest filter paper in the presence of condensed tannins from birdsfoot trefoil (Lotus corniculatus L.). For all four fungi, inhibition of endoglucanases was evident at 100 μg condensed tannins∙mL−1 with nearly complete inhibition at 300 μg condensed tannins∙mL−1. At 100 and 200 μg condensed tannins∙mL−1, the endoglucanase activity of N. frontalis RE1 was greater (P < 0.01) than that of the other three fungal species. Exposure

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Smith, Alexandra H., James A. Imlay, and Roderick I. Mackie. "Increasing the Oxidative Stress Response Allows Escherichia coli To Overcome Inhibitory Effects of Condensed Tannins." Applied and Environmental Microbiology 69, no. 6 (2003): 3406–11. http://dx.doi.org/10.1128/aem.69.6.3406-3411.2003.

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ABSTRACT Tannins are plant-derived polyphenols with antimicrobial effects. The mechanism of tannin toxicity towards Escherichia coli was determined by using an extract from Acacia mearnsii (Black wattle) as a source of condensed tannins (proanthocyanidins). E. coli growth was inhibited by tannins only when tannins were exposed to oxygen. Tannins auto-oxidize, and substantial hydrogen peroxide was generated when they were added to aerobic media. The addition of exogenous catalase permitted growth in tannin medium. E. coli mutants that lacked HPI, the major catalase, were especially sensitive to

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8

Susetyarini, Eko, Tutut Indria Permana, Supiana Dian Nurtjahyani, and Endrik Nurrohman. "HISTOLOGY OF NEW ZEALAND MALE RABBIT LIVER AFTER TREATMENT WITH SEVERAL TYPES OF BELUNTAS LEAF TANNIN EXTRACT." International Journal of Advanced Research 13, no. 02 (2025): 726–34. https://doi.org/10.21474/ijar01/20428.

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This study examined New zealand rabbits organ damage and liver histology after administering beluntas leaf tannin extract. The type of research is experimental research. The research was conducted at the Chemical Engineering Laboratory of the Malang State Polytechnic, the KesimmaMedica Laboratory of Malang, the Integrated Laboratory, and the Biology Laboratory of the University of Muhammadiyah Malang. The research design used a Completely Randomized Design (CRD) with four treatments and four replications. Treatment of hydrolyzed, condensed beluntas leaf tannin extract, pure tannin, and the con

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Kronberg, Scott L. "180 Using condensed tannins in plant materials more effectively with livestock." Journal of Animal Science 98, Supplement_2 (2020): 21. http://dx.doi.org/10.1093/jas/skz397.046.

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Abstract A large variety of plant species contain condensed tannins and a few of these have been developed as improved varieties for grazing or for feeding as long-stem, chopped or pelleted hay or as silage. Extracts of tannin-containing plant materials (e.g. quebracho tannin) and tannin-containing by-products of plant materials (e.g. grape marc) have also been fed to livestock. Interactions between livestock and condensed tannins and associated phenolic compounds are complicated and we have much to learn to understand and manage them better. Although many studies have been done on tannin-live

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Anttila, Anna-Kaisa, Anna Maria Pirttilä, Hely Häggman, et al. "Condensed conifer tannins as antifungal agents in liquid culture." Holzforschung 67, no. 7 (2013): 825–32. http://dx.doi.org/10.1515/hf-2012-0154.

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Abstract In the last decades, many wood preservatives have been prohibited for their ecotoxicity. The present article is focusing on the conifer-derived condensed tannins as environment-friendly options for the substitution of artificial wood preservatives. Eight different tannin fractions were extracted from spruce cones, spruce barks, and pine cones. The parameters of tannin extraction, such as the methods of purification and concentration of active components in the extracts, have been investigated. The cone and bark extracts were tested for the growth inhibition of eight brown-rot fungi, t

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Hagerman, Ann E., and Charles T. Robbins. "Specificity of tannin-binding salivary proteins relative to diet selection by mammals." Canadian Journal of Zoology 71, no. 3 (1993): 628–33. http://dx.doi.org/10.1139/z93-085.

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The tannin-binding specificity of salivary proteins in several mammals was investigated as a possible explanation for observed food habits. Moose (Alces alces) and beaver (Castor canadensis) produce salivary proteins that only bind the linear condensed tannins common in their preferred foods, such as willow, aspen, or birch. The mule deer (Odocoileus hemionus), which has a more generalized diet, produces salivary proteins that bind linear and branched-chain condensed tannins and gallotannins, but not an ellagitannin. The omnivorous black bear (Ursus americanus) produces salivary proteins that

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Lei, Lingyuan, Jing Zeng, Quanwei Liu, et al. "Effects of Soil Fauna on the Home-Field Advantage of Litter Total Phenol and Condensed Tannin Decomposition." Forests 15, no. 2 (2024): 389. http://dx.doi.org/10.3390/f15020389.

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Soil fauna play a vital role in contributing to the home-field advantage (HFA: litter decomposes faster in its natural habitat than elsewhere) during litter decomposition. Whether the presence of soil fauna affects the HFA of the decomposition of total phenols and condensed tannins, which are important components of litter, has rarely been investigated. In this study, litterbags with different mesh sizes were transplanted reciprocally, 0.04 mm (basically excluding soil fauna) and 3 mm (basically allowing all soil fauna to enter), in Lindera megaphylla and Cryptomeria fortunei forests. The resu

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McAvoy, Richard J., Bernard B. Bible, and Michael R. Evans. "Localized Accumulation of Condensed Tannins Associated with Poinsettia Bract Necrosis." Journal of the American Society for Horticultural Science 123, no. 5 (1998): 916–20. http://dx.doi.org/10.21273/jashs.123.5.916.

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The early onset of bract necrosis in poinsettia (Euphorbia pulcherrima Willd. ex. Klotzch) is characterized by small dark-stained spots that precede the development of enlarged necrotic lesions. Electron micrographs of adaxial epidermal and subepidermal tissues with early symptoms of necrosis revealed large, electron-dense deposits in cell vacuoles. These spherical bodies resembled condensed tannins observed in the epidermal tissues of peach and apple fruit. Chemical analysis of bract tissues confirmed the presence of condensed tannins. Furthermore, there were higher concentrations of condense

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Brunetto, Andrei L. R., Ana Luiza F. dos Santos, Isadora Zago, et al. "Intake of Condensed Tannins (Acacia mearnsii) by Lambs in Confinement and Its Impact on Growth Performance, Rumen Environment, and Meat." Fermentation 10, no. 12 (2024): 630. https://doi.org/10.3390/fermentation10120630.

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This study determined whether adding condensed tannins to the diet of confined lamb improves performance, metabolism, health, and meat composition and quality. We used 24 Lacaune lambs with an average initial weight of 24.5 ± 0.24 kg. The animals were divided into 12 pens with two animals each. In the treatment group, a black wattle extract was added to the lamb concentrate (2.5 g/kg dry matter), while the control group received only the basal diet (without extract). Black wattle contained 98.6 g/kg of condensed tannin. There was no difference between the performance variables, which included

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Susanto, I., M. Rahmadani, R. T. Pangesti, K. G. Wiryawan, E. B. Laconi, and A. Jayanegara. "Effects of various plant-based condensed tannin on rumen microbiome population: A meta-analysis." IOP Conference Series: Earth and Environmental Science 1341, no. 1 (2024): 012061. http://dx.doi.org/10.1088/1755-1315/1341/1/012061.

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Abstract Tannins are bioactive compounds found in plants and are very prospective for use in reducing methane gas production by ruminants. The effect of extracts of tannin compounds on methane gas parameters effectively reduces methane production. However, the population dynamics of the rumen microbiome showed varying results depending on tannin levels, types of tannins, and sources of tannins used. This study analyzed the effect of extracts of condensed tannin (CT) compounds from various plants on rumen microbiome populations using a meta-analysis approach. A total of 9 articles comprising 27

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Smith, Alexandra H., and Roderick I. Mackie. "Effect of Condensed Tannins on Bacterial Diversity and Metabolic Activity in the Rat Gastrointestinal Tract." Applied and Environmental Microbiology 70, no. 2 (2004): 1104–15. http://dx.doi.org/10.1128/aem.70.2.1104-1115.2004.

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ABSTRACT The effect of dietary condensed tannins (proanthocyanidins) on rat fecal bacterial populations was ascertained in order to determine whether the proportion on tannin-resistant bacteria increased and if there was a change in the predominant bacterial populations. After 3 weeks of tannin diets the proportion of tannin-resistant bacteria increased significantly (P < 0.05) from 0.3% ± 5.5% to 25.3% ± 8.3% with a 0.7% tannin diet and to 47.2% ± 5.1% with a 2% tannin diet. The proportion of tannin-resistant bacteria returned to preexposure levels in the absence of dietary tannins. A shif

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Lees, Garry L., Neil H. Suttill, Katharine M. Wall, and Thomas H. Beveridge. "Localization of condensed tannins in apple fruit peel, pulp, and seeds." Canadian Journal of Botany 73, no. 12 (1995): 1897–904. http://dx.doi.org/10.1139/b95-202.

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Seven varieties of post-harvest apple (Malus domestica Borkh.) fruit, i.e., Spartan, McIntosh, Newtown, Royal Gala, Jonagold, Red Delicious, and Golden Delicious, were examined for the presence and location of condensed tannins in the peel, pulp, and seeds. Statistically significant differences in the condensed tannin content were found between varieties and sources, and in different tissues within a variety. Red Delicious had the greatest amount of condensed tannin in the peel and pulp, whereas Golden Delicious had the least. The amount in the seed was low and variable. Light and electron mic

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VAILLANCOURT, R., A. E. SLINKARD, and R. D. REICHERT. "THE INHERITANCE OF CONDENSED TANNIN CONCENTRATION IN LENTIL." Canadian Journal of Plant Science 66, no. 2 (1986): 241–46. http://dx.doi.org/10.4141/cjps86-038.

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In lentil (Lens culinaris Medik.) condensed tannins are responsible for seed coat darkening during storage and the associated reduction in crop quality. The vanillin-HCl method was used to measure tannin concentration. Tannins were present only in the seed coat. Tannin concentration in the seed coat of 87 lines from the USDA World Lentil Collection ranged from 35 to 93 g kg−1 and averaged 63.3 g kg−1. The zero-tannin trait of PI 345635 lentil was controlled by a single recessive gene (tan tan) that had pleiotropic effects on plant pigmentation and seed coat thickness. Heritability of tannin co

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Hernández, Mario Cruz, Juan Carlos Contreras Esquivel, Faustino Lara, Raúl Rodríguez, and Cristóbal N. Aguilar. "Isolation and Evaluation of Tannin-degrading Fungal Strains from the Mexican Desert." Zeitschrift für Naturforschung C 60, no. 11-12 (2005): 844–48. http://dx.doi.org/10.1515/znc-2005-11-1205.

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Eleven fungal strains (4 Penicillium commune, 2 Aspergillus niger, 2 Aspergillus rugulosa, Aspergillus terricola, Aspergillus ornatus and Aspergillus fumigatus) were isolated, characterized morphologically and by their capacity to degrade tannins. Aspergillus niger Aa-20 was used as control strain. Several concentrations of hydrolysable tannin (tannic acid) were used as sole carbon source. All strains were able to degrade hydrolysable tannins. Aspergillus niger GH1 and PSH showed the highest tannin-degrading capacity (67 and 70%, respectively). Also, the fungal capacity to degrade condensed ta

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Picariello, Luigi, Alessandra Rinaldi, Martino Forino, Francesco Errichiello, Luigi Moio, and Angelita Gambuti. "Effect of Different Enological Tannins on Oxygen Consumption, Phenolic Compounds, Color and Astringency Evolution of Aglianico Wine." Molecules 25, no. 20 (2020): 4607. http://dx.doi.org/10.3390/molecules25204607.

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Background: In the wine industry, in addition to condensed tannins of grape origin, other commercial tannins are commonly used. However, the influence of oxygen uptake related to different tannin additions during the post fermentative phase in wine has not been completely investigated. In this study, we evaluated the influence of four different commercial tannins (namely, condensed tannins, gallotannins, ellagitannins and tea tannins) during four saturation cycles. Method: Wine samples were added with four different tannin classes (30 g/hL) as to have 5 different experimental samples: control,

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Haryatmi, Dwi, and Indah Tri Susilowati. "DETERMINING THE TANNIN CONTENT IN PISANG AMBON (Musa × paradisiaca L.) WITH THE POTENTIAL AS ANTHELMINTIC." Jurnal Kimia Riset 7, no. 2 (2022): 118–24. http://dx.doi.org/10.20473/jkr.v7i2.28859.

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Tannins result from plants' secondary metabolism, closely associated with plant defense mechanisms against insects. Condensed tannins can disrupt the life cycle of parasitic nematodes starting from eggs, adult worms, and larvae. Currently, the antiparasitic properties of condensed tannins are being investigated as an alternative for controlling parasites. The people use the young Pisang Ambon (Musa × parasidiaca L.) as an anthelmintic. People generally use this part of the banana peel. Based on this, a study was conducted to determine the tannin content in the peel and fruit of Pisang Ambon (M

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Mahdi Haroun. "Assessment of tannins extracts of Acacia nilotica ssp Adansonii pods and Azadirachta indica bark on leather processing." World Journal of Advanced Research and Reviews 16, no. 3 (2022): 187–92. http://dx.doi.org/10.30574/wjarr.2022.16.3.1218.

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Despite the fact, world leather industries are built on chromium tannage system, there is a growing interest of metal free tannages (chrome). This is primarily owing to the rising demand for chromium free tanning in the leather industry. The goal of this research paper was to evaluate the influences of vegetable tannins materials on the retannage of leather, by using Acacia nilotica ssp Adansonia pods (hydrolysable tannins) and Azadirachta indica bark (condensed tannins), and estimating the absorption and physico-mechanical properties of leather. The results indicated that this system of free

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Longland, A. C., M. K. Theodorou, S. J. Listerl, P. Morris, and M. Gill. "The Ability of Polyethylene Glycol to Enhance the Digestion of Tropical Forage Legumes of Varying Tannin Content." Proceedings of the British Society of Animal Production (1972) 1994 (March 1994): 76. http://dx.doi.org/10.1017/s0308229600026234.

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Condensed tannins have been implicated in reducing the nutritive value of potentially important feedstuffs, largely through reducing protein and fibre digestion. Tannins can mediate their effects directly by binding to the protein or fibre fraction rendering them resistant to digestion, or indirectly by binding with digestive enzymes, preventing their catalytic action. These adverse effects of tannins, however, can be mitigated by the use of agents such as polyethylene glycol (PEG) which form complexes with condensed tannins rendering them less effective as protein and fibre-binding agents. In

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Yang, Tao, Mengqi Dong, Juqing Cui, Lu Gan, and Shuguang Han. "Exploring the formaldehyde reactivity of tannins with different molecular weight distributions: bayberry tannins and larch tannins." Holzforschung 74, no. 7 (2020): 673–82. http://dx.doi.org/10.1515/hf-2019-0050.

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AbstractIn recent years, tannin degradation has been used to obtain tannin materials with an optimal molecular weight distribution (MWD) for synthesizing tannin-formaldehyde (TF) resin with high performance, but the optimal MWD of tannins is still unknown. The excellent formaldehyde reactivity of tannins is the basis for the synthesis of high-performance TF resin. Based on the formaldehyde reactivity of tannins, bayberry tannins and larch tannins were used to explore the optimal MWD of tannins for TF resin synthesis. Progressive solvent precipitation (PSP) was used to obtain tannin fractions w

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McAvoy, R. J., B. B. Bible, and M. R. Evans. "Early Onset of Poinsettia Bract Necrosis is Associated with Condensed Tannin Accumulation." HortScience 33, no. 3 (1998): 486a—486. http://dx.doi.org/10.21273/hortsci.33.3.486a.

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The early onset of bract necrosis in poinsettia (Euphorbia pulcherrima Willd. ex. Klotzch) is characterized by small dark-stained spots that precede the development of enlarged necrotic lesions. Electron micrographs of adaxial epidermal and subepidermal tissues with early symptoms of necrosis revealed large, electron dense deposits in cell vacuoles. These spherical bodies resembled condensed tannins observed in the epidermal tissues of peach and apple fruit. Chemical analysis of bract tissues showed higher condensed tannin concentrations in bract samples with 2 mm diameter lesions than in samp

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Mahdi, Haroun. "Assessment of tannins extracts of Acacia nilotica ssp Adansonii pods and Azadirachta indica bark on leather processing." World Journal of Advanced Research and Reviews 16, no. 3 (2022): 187–92. https://doi.org/10.5281/zenodo.7894643.

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Despite the fact, world leather industries are built on chromium tannage system, there is a growing interest of metal free tannages (chrome). This is primarily owing to the rising demand for chromium free tanning in the leather industry. The goal of this research paper was to evaluate the influences of vegetable tannins materials on the retannage of leather, by using <em>Acacia nilotica </em>ssp <em>Adansonia</em> pods (hydrolysable tannins) and <em>Azadirachta indica</em> bark (condensed tannins), and estimating the absorption and physico-mechanical properties of

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Hashida, Koh, Seiji Ohara, and Rei Makino. "Improvement of formaldehyde-scavenging ability of condensed tannins by ammonia treatment." Holzforschung 60, no. 2 (2006): 178–83. http://dx.doi.org/10.1515/hf.2006.029.

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Abstract Condensed tannins have formaldehyde gas-scavenging ability. Tannins consisting of phloroglucinol-type A-rings, such as prodelphinidin and procyanidin, had higher formaldehyde-scavenging ability than those consisting of resorcinol-type A-rings, such as prorobietinidin and profisetinidin. This ability was markedly improved by ammonia treatment. The increase in formaldehyde-scavenging ability was especially notable in the case of condensed tannins with a high ratio of pyrogallol-type B-rings, such as prorobietinidin and prodelphinidin. To clarify the factors affecting improvement of the

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Eckardt, Jonas, Lorenzo Moro, Elena Colusso, Primož Šket, Samuele Giovando, and Gianluca Tondi. "Comparing Hydrolysable and Condensed Tannins for Tannin Protein-Based Foams." Polymers 17, no. 2 (2025): 153. https://doi.org/10.3390/polym17020153.

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Tannin-based foams have gained attention as a potential bio-based alternative to conventional synthetic foams. Traditionally, namely condensed tannins (CT) have been used, leaving the potential of hydrolysable tannins (HT) largely unexplored. This study compared the performance of chestnut (HT) and quebracho (CT) in tannin–protein-based foams at different tannin ratios. Using soy protein isolate (SPI) and hexamine under acidic conditions, a series of tannin foams were produced through a mechanical foaming method and analyzed for cell structure, compression strength, thermal conductivity, and c

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Helsper, J. P. F. G., A. Van Norel, K. Burger-Meyer, and J. M. Hoogendijk. "Effect of the absence of condensed tannins in faba beans (Vicia faba) on resistance to foot rot, Ascochyta blight and chocolate spot." Journal of Agricultural Science 123, no. 3 (1994): 349–55. http://dx.doi.org/10.1017/s0021859600070350.

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SUMMARYThe effect of breeding for the absence of condensed tannins in the testa ofVicia fabaL. on resistance to foot rot, Ascochyta blight and chocolate spot diseases was investigated in 1988–92 at Wageningen, The Netherlands. For this purpose the disease development in tannin-free and tannin-containing partners of six near-isogenic pairs was compared after exposure to causative pathogens. Except for one near-isogenic pair, in which both partner lines showed a relatively high resistance, the tannin-free lines were more susceptible to foot rot than the tannin-containing partners of the same pai

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Azevedo, Tatiane Kelly Barbosa de, Débora Baiocchi Princivalli Campos, Diná Garcia de Souza, et al. "Relationship Between Age and Condensed Tannin Content in the Bark of Two Forest Species Grown in Northeast Brazil." Revista de Gestão Social e Ambiental 18, no. 11 (2024): e09693. http://dx.doi.org/10.24857/rgsa.v18n11-073.

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Objective: This research aimed to evaluate the influence of tree age on the condensed tannins content in the bark of two forest species. Theoretical Framework: Tannins are phenolic compounds present in various parts of plants and have consolidated applications in the market. This way, silvicultural studies of different species with the potential to produce are relevant. Method: Barks of Azadirachta indica at 5, 6, and 7 years and Mimosa caesalpiniaefolia at 6, 7, and 9 years were collected from an experimental plantation located in a forest area in Rio Grande do Norte, Brazil. The barks were t

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Kato, Camila Gabriel, Geferson de Almeida Gonçalves, Rosely Aparecida Peralta та ін. "Inhibition of α-Amylases by Condensed and Hydrolysable Tannins: Focus on Kinetics and Hypoglycemic Actions". Enzyme Research 2017 (14 травня 2017): 1–12. http://dx.doi.org/10.1155/2017/5724902.

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The aim of the present study was to compare the in vitro inhibitory effects on the salivary and pancreatic α-amylases and the in vivo hypoglycemic actions of the hydrolysable tannin from Chinese natural gall and the condensed tannin from Acacia mearnsii. The human salivary α-amylase was more strongly inhibited by the hydrolysable than by the condensed tannin, with the concentrations for 50% inhibition (IC50) being 47.0 and 285.4 μM, respectively. The inhibitory capacities of both tannins on the pancreatic α-amylase were also different, with IC50 values being 141.1 μM for the hydrolysable tanni

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Ferreira, D., E. V. Brandt, J. Coetzee, and E. Malan. "ChemInform Abstract: Condensed Tannins." ChemInform 30, no. 41 (2010): no. http://dx.doi.org/10.1002/chin.199941293.

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Moccia, Federica, Alessandra Piscitelli, Samuele Giovando, et al. "Hydrolyzable vs. Condensed Wood Tannins for Bio-based Antioxidant Coatings: Superior Properties of Quebracho Tannins." Antioxidants 9, no. 9 (2020): 804. http://dx.doi.org/10.3390/antiox9090804.

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Tannins have always been the subject of great interest for their countless properties, first of all their ability to produce functional coatings on a variety of materials. We report herein a comparative evaluation of the antioxidant properties of wood tannin-based coated substrates. In particular, nylon membrane filters were functionalized with chestnut (hydrolyzable) or quebracho (condensed) tannins by dip coating under different conditions. The efficiency of functionalization was evaluated by the 2,2-diphenyl-1-picrylhydrazyl (DPPH) and ferric reducing/antioxidant power (FRAP) assays, which

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Mayworm, Marco A. S., Carolina A. Lima, Augusto C. B. Tomba, Caroline C. Fernandes-Silva, Maria L. F. Salatino, and Antonio Salatino. "Does Propolis Contain Tannins?" Evidence-Based Complementary and Alternative Medicine 2014 (2014): 1–4. http://dx.doi.org/10.1155/2014/613647.

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Although polyphenols have been reported as common constituents of propolis, tannins have rarely been mentioned as its constituents. Propolis samples from seven localities in Brazil were analyzed for detection of proanthocyanidins (condensed tannins) and determination of the tannin content. Positive reaction for proanthocyanidins was observed for all samples tested. The contents of tannins varied in the range 0.6–4.1%. A high degree of correlation was noted between total phenols and tannin content. Red and green propolis contained high contents of tannins, while in brown propolis the content wa

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Aquino, Faustino Ruiz, Rossy Feria Reyes, José Guadalupe Rutiaga Quiñones, Wenceslao Santiago García, Mario Ernesto Suárez Mota, and Héctor Hugo Esquivel Reyes. "DEVELOPMENT AND VALIDATION OF AN ANALYTICAL METHOD FOR CONDENSED TANNIN EXTRACTS OBTAINED FROM THE BARK OF FOUR TREE SPECIES USING HPLC." WOOD RESEARCH 66(2): 2021 66, no. 2 (2021): 171–82. http://dx.doi.org/10.37763/wr.1336-4561/66.2.171182.

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Herein, we evaluated the content of condensed tannins present in the bark of four tree species that are Quercus laurina Humb. & Bonpl., Quercus crassifolia Humb. & Bonpl., Arbutus xalapensis Kunth, and Prunus serotina Ehrn. An analytical method using high-performance liquid chromatography (HPLC) for condensed tannin extracts was developed and validated. Also, the aqueous extracts were analyzed by Fourier transform infrared spectroscopy (FTIR). Based on the Stiasny number, A. xalapensis, and Q. laurina represent an important source of condensed tannins, which may be subject to exploitat

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Adu, Risna Erni Yati, Marselina Theresia Djue Tea, and Yunita Bouk. "Ekstraksi Tanin dari Limbah Kulit Biji Asam dan Penggunaannya Sebagai Biomordan pada Pewarnaan Tenun Timor Secara Alami." Jurnal Riset Kimia 13, no. 2 (2022): 178–87. http://dx.doi.org/10.25077/jrk.v13i2.509.

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Tannins from tamarind seed husk were extracted and applied as a biomordant for natural dyeing process of Timor woven fabrics. Tannins were extracted using hot distilled water, qualitatively and quantitatively analyzed and applied as a color binder to the woven fabrics. The color characteristics of woven fabrics with tannins were compared to the woven fabrics that mordanted with Al2(SO4)3 and FeSO4 at the concentration of 15%. Tamarind seed husk tannins are in the form of a brownish red powder. Qualitative and quantitative tests showed that tamarind seed coat contained condensed tannins with a

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Jansman, A. J. M., H. Enting, M. W. A. Verstegen, and J. Huisman. "Effect of condensed tannins in hulls of faba beans (Vicia fabaL.) on the activities of trypsin (EC2.4.21.4) and chymotrypsin (EC2.4.21.1) in digesta collected from the small intestine of pigs." British Journal of Nutrition 71, no. 4 (1994): 627–41. http://dx.doi.org/10.1079/bjn19940168.

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The effects of condensed tannins in hulls of faba beans (Vicia fabaL.) on the activities of trypsin (EC3.4.21.4) and chymotrypsin (EC3.4.21.1) in digesta obtained from the small intestine of pigs were studied. Using four castrated male pigs (mean body weight 83 kg) fitted with both a simple T-cannuIa in the duodenum and a post-valvular T-cannula at the terminal ileum, two experimental diets were tested in a Latin square design. The low-tannin diet (LT) contained 200 g faba bean hulls (cv. Blandine)/kg with a low content of condensed tannins (< 0.1 % catechin equivalents). The high-tannin di

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Miller, Perry R., and Nancy J. Ehlke. "Inheritance of condensed tannins in birdsfoot trefoil." Canadian Journal of Plant Science 77, no. 4 (1997): 587–93. http://dx.doi.org/10.4141/p96-081.

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Neither the inheritance of condensed tannins (CT) in tannin-positive birdsfoot trefoil (Lotus corniculatus L.), nor the quantitative genetic analysis of CT concentration in a forage legume have been previously reported. The objective of this study was to determine the inheritance of CT concentration in tannin-positive birdsfoot trefoil. High-, medium-, and low-tannin parents were selected from NC-83 birdsfoot trefoil germplasm and intercrossed in two independent six-parent diallel sets to generate progenies for quantitative genetic analyses. Maturity, herbage yield, leaf fraction (LF) and CT c

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Sallam, Ibrahim E., Amr Abdelwareth, Heba Attia, et al. "Effect of Gut Microbiota Biotransformation on Dietary Tannins and Human Health Implications." Microorganisms 9, no. 5 (2021): 965. http://dx.doi.org/10.3390/microorganisms9050965.

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Tannins represent a heterogeneous group of high-molecular-weight polyphenols that are ubiquitous among plant families, especially in cereals, as well as in many fruits and vegetables. Hydrolysable and condensed tannins, in addition to phlorotannins from marine algae, are the main classes of these bioactive compounds. Despite their low bioavailability, tannins have many beneficial pharmacological effects, such as anti-inflammatory, antioxidant, antidiabetic, anticancer, and cardioprotective effects. Microbiota-mediated hydrolysis of tannins produces highly bioaccessible metabolites, which have

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Guimarães-Beelen, Patrícia Mendes, Telma Teresinha Berchielli, Roger Beelen, João Araújo Filho, and Simone Gisele de Oliveira. "Characterization of condensed tannins from native legumes of the Brazilian northeastern semi-arid." Scientia Agricola 63, no. 6 (2006): 522–28. http://dx.doi.org/10.1590/s0103-90162006000600002.

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Despite the possible influence of tannins on the nutritional value of the forages from Caatinga vegetation, there are few studies that evaluated their tannin concentration. This study was conducted to characterize condensed tannins present in the legumes species Mimosa hostilis (Jurema Preta), Mimosa caesalpinifolia (Sabiá) and Bauhinia cheilantha (Mororó), at three stages of their phenological cycle. The concentration of soluble tannin (ST), bound tannin (BT) and total tannin (TT) were determined using the butanol-HCL method; astringency was by the radial diffusion method, and the monomeric c

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Anjos, Bruna Ferreira dos, Tatiane Kelly Barbosa de Azevêdo, Elaine Cristina Alves da Silva, et al. "Assessment of chemically modified vegetable tannins as coagulants for water treatment." Ambiente e Agua - An Interdisciplinary Journal of Applied Science 19 (July 2, 2024): 1–12. http://dx.doi.org/10.4136/ambi-agua.2985.

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This research assessed the efficiency of chemically modified tannins as coagulants for water treatment. Tannins from Anacardium occidentale (cashew tree) and Mimosa caesalpiniifolia (‘sabiá’) barks and seedless fruits of Anadenanthera colubrina (‘angico’) and Pityrocarpa moniliformis (‘angico de bezerro’) were evaluated after cationization to remove turbidity from water. After extraction, the total solids content (TSC), Stiasny index (SI), and total condensed tannins content (TCC) of the tannins extracts were determined. Extracted tannins were converted into powders and cationized. Then, the c

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Agrippina, Fidela Devina, Maya Ismayati, Sri Hidayati, and Bima Putra Pratama. "Utilization of Tannins with Various Polymers for Green-Based Active Packaging: A Review." Jurnal Sylva Lestari 12, no. 3 (2024): 648–83. http://dx.doi.org/10.23960/jsl.v12i3.893.

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Tannin is a major polyphenolic secondary metabolite widely distributed in the forestry sector and can be added to polymer matrices to manufacture bioactive films for food packaging. Tannins have functional properties as antioxidants, antibacterial, and anti-inflammatories. Tannins are classified into two types, namely condensed tannins and hydrolyzable tannins. Tannins have been used primarily in food, wood, leather, pharmaceutical, and other industries. In the food industry, tannins are used to develop food packaging, preservation, and the function of the food industry. Tannin molecules have

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Chuzaemi, Siti, and Iftitah Nuzulia Qur’any. "Ruminal profile of completed feed as influenced by myristic and tannins addition." E3S Web of Conferences 335 (2022): 00028. http://dx.doi.org/10.1051/e3sconf/202233500028.

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The study aimed to determine the effect of adding tannin and myristic acid in complete feed on nutrient content and the Profile of volatile fatty acids (VFA) in vitro. The materials used for this research were corn straw, condensed tannins, myristic acid, coffee waste, rice bran, tapioca byproduct, soybean meal, copra meal, and palm kernel meal. The method was used in this experiment was laboratory experiment with four treatments and three replications. The treatment consisted of T1 complete feed (40% corn straw + 60% concentrate (be based DM)), T2 (complete feed + condensed tannins 3%/kg DM a

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Huang, Minshen, Lihua Zhang, Shudong Wei, Qi Zeng, Haichao Zhou, and Yiming Lin. "Seasonal Variation of Tannin and Nutrient in Aegiceras corniculatum Leaves in Zhangjiang Mangrove Ecosystem." Open Chemical Engineering Journal 9, no. 1 (2015): 143–48. http://dx.doi.org/10.2174/1874123101509010143.

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Seasonal dynamics of total phenolics (TP), extractable condensed tannins (ECT), protein-bound condensed tannins (PBCT), fiber-bound condensed tannins (FBCT), total condensed tannins (TCT) and nitrogen contents in sun and shade leaves of Aegiceras corniculatum were studied in the Zhangjiang Estuary, Fujian Province, China. The contents of TP, ECT and TCT in the sun leaves were significantly higher than those in the shade leaves through the season. The N content in sun leaves was higher than that in shade leaves in the autumn, while it was lower in the summer, and there was no significant differ

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Rustiah, Waode, A. Fatmawati Muharram, Dewi Arisanti, and Alfian Alfian. "Identifikasi Senyawa Tanin Pada Ekstrak Sabut Buah Pinang (Areca catechu. L)." Lontara 2, no. 1 (2021): 35–41. http://dx.doi.org/10.53861/lontarariset.v2i1.187.

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Areca catechu (Areca catechu. L) contains many chemical components, namely, pectin, cellulose, hemicellulose, lignin, pectin oxalate and flavonoids. Tannins are very complex organic substances and consist of phenolic compounds. Tannins are obtained by extraction with water and ethanol solvents because tannins can dissolve with these solvents. This study aims to identify tannin compounds in areca nut using ethanol as a solvent. This research is a laboratory experiment with an extraction process using the maceration method. The areca nut is dried and mashed and then sifted. Then the powder was m

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Thitz, Paula, Lauri Mehtätalo, Panu Välimäki, et al. "Phytochemical Shift from Condensed Tannins to Flavonoids in Transgenic Betula pendula Decreases Consumption and Growth but Improves Growth Efficiency of Epirrita autumnata Larvae." Journal of Chemical Ecology 46, no. 2 (2019): 217–31. http://dx.doi.org/10.1007/s10886-019-01134-9.

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AbstractDespite active research, antiherbivore activity of specific plant phenolics remains largely unresolved. We constructed silver birch (Betula pendula) lines with modified phenolic metabolism to study the effects of foliar flavonoids and condensed tannins on consumption and growth of larvae of a generalist herbivore, the autumnal moth (Epirrita autumnata). We conducted a feeding experiment using birch lines in which expression of dihydroflavonol reductase (DFR), anthocyanidin synthase (ANS) or anthocyanidin reductase (ANR) had been decreased by RNA interference. Modification-specific effe

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Kadigi, Joseph H., Bashiri I. Muzzo, and Sebastian Schreiber. "Potential Benefits of Tannins on Ruminant Health, Production and Environmental Sustainability." European Journal of Nutrition & Food Safety 16, no. 10 (2024): 13–24. http://dx.doi.org/10.9734/ejnfs/2024/v16i101552.

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Tannins are naturally occurring polyphenolic compounds increasingly recognized for their potential benefits to ruminants. Tannins can be extracted from plants' roots, bark, leaves, and seed husks. Management of plant communities to produce a diverse array of secondary compounds, particularly tannins, is a promising strategy for holistically enhancing agroecosystems on rangelands and benefiting free grazing ruminant animals. Deterioration of rangelands constrains plant diversity, reducing tanniferous forage plants and limiting tannin availability to free-grazing ruminants. Ruminants supplemente

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García, Ramiro, Antonio Aguilera, Juan C. Contreras-Esquivel, Raúl Rodríguez, and Cristóbal N. Aguilar. "Extraction of Condensed Tannins from Mexican Plant Sources." Zeitschrift für Naturforschung C 63, no. 1-2 (2008): 17–20. http://dx.doi.org/10.1515/znc-2008-1-204.

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Contents of total polyphenols, condensed tannins and proanthocyanidins, and their stability to various pH values and temperatures were studied in Mexican blueberry, cuautecomate fruit, garambullo fruit, aubergine, coffee pulp and residues of black grapes. Several aqueous extracts, obtained through a one-pass-extraction process, were analyzed using liquid chromatography in order to quantify the condensed tannin (proanthocyanidin) content responsible for their antioxidant activity and colour. All tested samples included high proanthocyanidin contents demonstrating that these Mexican fruits and v

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Verly Lopes, Dercilio Junior, H. Michael Barnes, and Gabrielly dos Santos Bobadilha. "Influence of Heat Treatment and Tannin Impregnation on Boron Depletion and Wood Durability." Forests 11, no. 2 (2020): 201. http://dx.doi.org/10.3390/f11020201.

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Heat treatment (HT) of a mixture of tannins and inorganic boron compounds showed effective results against wood decay organisms. Boron compounds play a critical role in the preservation of wood against wood decay organisms. The use of tannins and HT represents a relatively new environmentally friendly approach to the wood preservation industry. The aim of this study was to investigate the effect of tannin impregnation and HT on boron depletion, and termite and fungi resistance. Southern yellow pine (SYP) and yellow-poplar (YP) cube samples were used for this study. A mixture of condensed tanni

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Mubarok, Mahdi, Elham Azadeh, Firmin Obounou Akong, Stéphane Dumarçay, Philippe Gérardin, and Christine Gérardin-Charbonnier. "Effect of Tannins Addition on Thermal Stability of Furfurylated Wood." Polymers 15, no. 9 (2023): 2044. http://dx.doi.org/10.3390/polym15092044.

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This article presents the effect of the addition of condensed tannins, used as a reticulation agent, on the polymerization of furfuryl alcohol during wood furfurylation, as well as the effect of these condensed tannins on the thermal stability of modified wood. Three kinds of dicarboxylic acids (adipic acid, succinic acid, and tartaric acid), as well as glyoxal, used as model of a wood reticulation agent, were used to catalyze the polymerization of furfuryl alcohol or tannin-furfuryl alcohol solutions. Impregnation of furfuryl alcohol or tannin-furfuryl alcohol solution into the wood, followed

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