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Artykuły w czasopismach na temat „Tannin”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Makkar, H. P. S., M. Blümmel, and K. Becker. "Formation of complexes between polyvinyl pyrrolidones or polyethylene glycols and tannins, and their implication in gas production and true digestibility in in vitro techniques." British Journal of Nutrition 73, no. 6 (1995): 897–913. http://dx.doi.org/10.1079/bjn19950095.

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Various tannin-complexing agentsw have been used to study the potential adverse effects of tannis on rumen metabolism. Using a method based on turbidity formation, the binding of various tannin-complexing agents (polyvinyl polypyrrolidone (PVPP), polyethylene glycol (PEG) of molecular weights 2000 to 35000, and polyvinyl pyrrolidone (PVP) of molecular weight 10000, 40000 and 360000) to tannins (tannic acid, purified tannins from quebracho (Aspidosperma quebracho) and leaves of trees and shrubs (Acioa barteri, Dichostachys cinerea, Guiera senegalensis, Piliostigma reticulatum)) was investigated

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2

Yan, Q., and A. Bennick. "Identification of histatins as tannin-binding proteins in human saliva." Biochemical Journal 311, no. 1 (1995): 341–47. http://dx.doi.org/10.1042/bj3110341.

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Tannins have a number of detrimental biological effects and these include interference with normal growth and metabolism if they are present in the feed of various animals. Proline-rich proteins (PRPs) in saliva have been shown to provide protection against tannin, but little is known about the mechanism of protection and interaction of other salivary proteins with tannin. To identify tannin-binding human salivary proteins, parotid and submandibular/sublingual saliva samples were adsorbed with tannin. PRPs, and in particular a group of low-M(r) proteins, were readily precipitated by tannin. Th

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3

Mwangi, Sharif Zuberi, Valerian Cosmas Silayo, and Davis Naboth Chaula. "The Impact of Cashew Nut (Anacardium occidentale) Testa Tannin Feeding Ratio on the Chemical and Mechanical Characteristics of Leather Tanned from Cowhide, Goatskin and Sheepskin." International Research Journal of Pure and Applied Chemistry 25, no. 4 (2024): 65–75. http://dx.doi.org/10.9734/irjpac/2024/v25i4867.

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In recent years, there has been a growing interest in exploring natural alternatives to synthetic tannins, driven by concerns over sustainability and environmental impact. Natural tannins offer several advantages, including biodegradability, renewability, and lower environmental impact compared to synthetic chemicals. Among the natural tannins under investigation, cashew nut testa tannin has emerged as a promising candidate due to its abundance, renewability, and potential benefits in leather tanning applications. This research investigated the impact of varying feeding ratios of cashew nut te

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4

Frank Mayer. "Tannins: Natural plant-derived polyhydroxy phenolic compounds with potential for biotechnological and biomedical applications." World Journal of Biological and Pharmaceutical Research 2, no. 1 (2022): 001–4. http://dx.doi.org/10.53346/wjbpr.2022.2.1.0127.

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The difference between Tannin and Tannic Acid is that the term Tannin is used to name the group of organic compounds whereas Tannic acid is a type of tannin. Members of the group of Tannins - all of them polyhydroxyphenolic compounds – are present in leaves and other nutrient-rich parts of a huge number of Angiosperm plants. In nature, Tannins play a significant role in the protection of the plants against herbivores. Tannins inactivate enzymes in the digestive tract of the herbivores, with respective consequences: the herbivores may die of starvation. A well-known example for a technological

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5

Mutiar, Sri, and Anwar Kasim. "Potential and Application of Vegetable Tanning Materials from Industrial Forest Plantation in Indonesia." Journal of Fibers and Polymer Composites 2, no. 1 (2023): 29–45. http://dx.doi.org/10.55043/jfpc.v2i1.62.

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Vegetable tanning materials are sourced from plants that contain tannin compounds. Tannins are obtained through the extraction method from the roots, stems, bark, or fruit of the original plant. There are several forest management companies in Indonesia that produce wood from plant species Acacia auriculiformis and Acacia mangium. Both species are known as Acacia. Acacia is an important source of tannin for material tanner vegetables. This wood is produced as a raw material for the pulp and paper industry. However, the bark contains tannin and has not been used optimally. Therefore, the study'

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6

Odenyo, A. A., and P. O. Osuji. "Tannin-tolerant ruminal bacteria from East African ruminants." Canadian Journal of Microbiology 44, no. 9 (1998): 905–9. http://dx.doi.org/10.1139/w98-073.

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Three strains of tannin-tolerant rumen bacteria were isolated from enrichment cultures of rumen microflora of sheep, goat, and antelope and established in medium containing high concentrations of crude tannin extract or tannic acid. These three strains (EAT2, ES3, and EG19), characterized as Selenomonas species, were curved rods, obligately anaerobic, Gram negative, highly motile, and grew in media containing 50 g of tannin extract/L and 50-70 g of tannic acid/L. Strain EAT2 was able to hydrolyze gallic acid, while strains ES3 and EG19 hydrolyzed tannic acid but not gallic acid. All isolates w

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7

Mutuku, Maxwell, Jackson Ombui, and Arthur Onyuka. "Assessment of Coffee Pulp as a Potential Source of Tannins for Leather Processing." Textile & Leather Review 5 (March 17, 2022): 132–46. http://dx.doi.org/10.31881/tlr.2021.31.

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The leather industry is experiencing environmental challenges due to pollution associated with chromium tanning. Vegetable tanning is considered as an ecofriendly alternative method. Previous research studies have established that coffee contains 1-10% of tannins. In this study coffee arabica pulp was determined for its tannin content and tanning strength for potential use as a source of tanning material. The hide powder method was used and the tannin content of coffee arabica pulp determined as 5.04% with the tanning strength of 2.26 compared to mimosa which had a tannin content of 63.56% wit

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8

Earl, Julia E., Joseph F. Aubert, Emma O. Michael, and Daniel J. Edwards. "Effects of Soil, Light, and Temperature on Freshwater Tannin Concentrations." Hydrobiology 4, no. 1 (2025): 2. https://doi.org/10.3390/hydrobiology4010002.

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Tannins are plant secondary compounds that leach into soil and water. Tannin concentrations can be higher in lentic freshwater than in other aquatic ecosystems, which can result in toxicity to freshwater organisms. While the amount of plant material and the plant tissue concentrations affect aqueous tannin concentrations, little is known about which environmental conditions alter the removal and breakdown of tannins in freshwater, altering the exposure of freshwater organisms. We investigated the effects of soil, light, and temperature on aqueous tannin concentrations. Tannins degraded faster

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9

Nyaga, Mwenda, Paul Tanui, and Samuel Njenga. "Evaluation of Tamarindus indica L. Seed Tannins." Textile & Leather Review 6 (August 18, 2023): 373–86. http://dx.doi.org/10.31881/tlr.2023.081.

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Tannins are water-soluble polyphenols mostly found in vascular plants and are important raw materials in many industries like leather, pharmaceuticals, and food and beverages. Tannins protect the plant and help its growth. In this study, Tamarindus indica L. seeds were extracted for the determination of tannin content and the tanning strength by the hide powder method. Earlier studies showed that Tamarindus indica L. seeds varied in the amount of tannins present. Mimosa was used as a control. The tanning strength was 1.73 for the tamarind seed extract and 2.06 for mimosa. The tannin content wa

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10

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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11

Lamy, E., E. S. Baptista, A. V. Coelho, and F. Capela e. Silva. "Morphological alterations in salivary glands of mice (Mus musculus) submitted to tannin enriched diets: comparison with sialotrophic effects of sympathetic agonists stimulation." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 62, no. 4 (2010): 837–44. http://dx.doi.org/10.1590/s0102-09352010000400012.

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In order to study the effects of tannins at histomorphological level, mice were either fed with three structurally different types of tannins (tannic acid, chestnut, and quebracho) or treated with isoproterenol, during 10 days. Acini of parotid and submandibular glands increased significantly, being the increase higher for parotid compared to submandibular glands, and higher in the quebracho compared with the other tannin groups. Sublingual acinar size also increased after tannin consumption, by opposition to isoproterenol-treated animals. The results present evidences that the effects produce

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12

Kusumo, Galuh Gondo, M. A. Hanny Ferry Fernanda, and Heppy Asroriyah. "Identifikasi Senyawa Tanin Pada Daun Kemuning (Murraya panicullata L. Jack) Dengan Berbagai Jenis Pelarut Pengekstraksi." Journal of Pharmacy and Science 2, no. 1 (2017): 29–32. http://dx.doi.org/10.53342/pharmasci.v2i1.63.

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ABSTRAKKemuning (Murraya paniculata L. Jack) adalah salah satu kekayaan alam yang memiliki banyak manfaat bagi kehidupan manusia. Tanin merupakan salah satu metabolit sekunder dari kemuning yang dapat digunakan sebagai anti diare dan pelangsing. Ekstrak kemuning didapatkan dari maserasi menggunakan tiga pelarut berbeda, yaitu metanol, etanol dan etil asetat. Tannin kemudian dipisahan dari ekstrak dengan menggunakan kromatografi lapis tipis (KLT) dengan berbagai jenis pelarut. Hasil nalisis menunjukkan bahwa pelarut terbaik untuk mengekstraksi tanin adalah metanol dengan perolehan 23,6989 g (31

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13

Altun, Nurver, Emel Topçu, Leyla Kılcı, Şengül Alpay Karaoğlu, and Özlem Faiz. "Determination of tannin activity and Paenibacillus alvei (Cheshire & Cheyne) Ash et al. (Bacillii: Paenibacillaceae) on the biocontrol of tannin-tolerant Agelastica alni L., 1758 (Coleoptera: Chrysomelidae) larvae." Turkish Journal of Entomology 49, no. 2 (2025): 213–27. https://doi.org/10.16970/entoted.1661578.

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Tannins are among the most abundant secondary metabolites synthesized by plants. Agelastica alni L., 1758 (Coleoptera: Chrysomelidae) is a critical forest pest. This study investigated the effect of Paenibacillus alvei (Cheshire &amp; Cheyne) Ash et al. (Bacillii: Paenibacillaceae) and tannins against A. alni larvae. The larvae were collected from the Çayeli district of Rize province in 2022. In the feeding experiments, artificial diets containing 1.25%, 2.5% and 5% tannins were prepared. 100 and 200 µl of P. alvei were applied to the infected groups. Nutritional indices, pupal masses, phe

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14

Santos, José Danrley Cavalcante dos, Edilson Paes Saraiva, Severino Gonzaga Neto, et al. "Feeding Behavior of Lactating Dairy Cattle Fed Sorghum-Based Diets and Increasing Levels of Tannic Acid." Agriculture 11, no. 2 (2021): 172. http://dx.doi.org/10.3390/agriculture11020172.

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Tannins have been used to trigger positive effects on ruminal metabolism and increase ruminant production efficiency, since they increase the supply of dietary protein in the small intestine. Increasing levels of tannic acid in a sorghum-based diet on the feeding behavior of five Holstein/Zebu crossbred lactating dairy cows was evaluated. They were subjected to a 5 × 5 Latin square experimental design, with fivelevels of tannin as dry matter (DM) in the diet (0.46, 1.30, 2.60, 3.90, and 5.20%). The levels of the tannic acid added were established based on the quantity of condensed tannin in hi

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15

Donald Mudenda Chisowa. "Comparative evaluation of the effect of boiling and autoclaving of legume grains on tannin concentration." Magna Scientia Advanced Biology and Pharmacy 7, no. 1 (2022): 009–17. http://dx.doi.org/10.30574/msabp.2022.7.1.0080.

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The study was designed to evaluate the effect of boiling and microwave treatment methods on reducing the concentration of tannins in Soy bean (Sb), Cowpea (Cp) and Pigeon pea (Pg) legume grains (LGs). The raw samples of LGs were roasted in a microwave oven for 3 and 6 minutes at 120 Three (3) LG seeds weighing 30 gms were boiled for 30 and 60 minutes in water at 100 oC. Meals of Raw, boiled and microwaved Sb, Pp and Cp LGs were subjected to proximate analysis for levels of tannins using the Folin-Ciocalteu assay technique. Absorbance for each sample as indicator of tannin concentration was rea

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16

Alum, Benedict Nnachi. "Tannins and Leather: Chemistry, Tanning Processes, and Environmental Impacts." NEWPORT INTERNATIONAL JOURNAL OF SCIENTIFIC AND EXPERIMENTAL SCIENCES 5, no. 3 (2024): 33–37. http://dx.doi.org/10.59298/nijses/2024/10.5.333337.

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Tannins are plant-derived polyphenolic compounds that stabilise collagen fibres and give the finished product qualities like strength, flexibility, and water resistance. Leather manufacturers frequently use tannins for this reason. This article covers the intricacy of tannin molecules, their applications in the leather production sector, and their roles in collagen cross-linking, water repellency, and the mechanical properties of leather. It also discusses the more traditional tanning techniques, such as chromium and vegetable tanning, emphasising their differences and potential environmental

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17

Petchidurai, Ganeshan, Kitherian Sahayaraj, Laila A. Al-Shuraym, Bader Z. Albogami, and Samy M. Sayed. "Insecticidal Activity of Tannins from Selected Brown Macroalgae against the Cotton Leafhopper Amrasca devastans." Plants 12, no. 18 (2023): 3188. http://dx.doi.org/10.3390/plants12183188.

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Seaweeds, also known as marine macroalgae, are renewable biological resources that are found worldwide and possess a wide variety of secondary metabolites, including tannins. Drifted brown seaweed (DBSW) is particularly rich in tannins and is regarded as biological trash. The cotton leaf hopper Amrasca devastans (Distant) has caused both quantitative and qualitative losses in cotton production. Drifted brown seaweeds (DBSWs) were used in this study to extract, qualitatively profile, and quantify the levels of total tannins, condensed tannins, hydrolyzable tannins, and phlorotannins in the seaw

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18

Ozkan, Cigdem Kilicarislan. "Tanning with Pomegranate Peel Tannin." Journal of the American Leather Chemists Association 118, no. 7 (2023): 301–6. http://dx.doi.org/10.34314/jalca.v118i7.7860.

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By-products of pomegranate juice enterprises are evaluated as a “green” raw material for many industries. In this study, pomegranate peels which are well known with high polyphenolic content were evaluated as a potential source of tanning agent for leather industry. For this purpose, firstly pomegranate peels were extracted in Koch extractor at 70°C for 8 hours. In order to determine the tanning ability, 30% of ground pomegranate peel powder (containing 7.2% of active tannin matter) was used in the tanning process and pomegranate peel tanned leather was evaluated in terms of increases in thick

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Khan, Shahid Rehman, Shahzad Maqsood Khan, and Rafi Ullah Khan. "Eco-Friendly Valorization and Utilization of Plant Waste as a Source of Tannin for Leather Tanning." Sustainability 15, no. 5 (2023): 3884. http://dx.doi.org/10.3390/su15053884.

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In the present study, bark, which is the waste part of a tree, was utilized as a source of tannin for leather tanning after its value addition. The barks of Acacia nilotica L. and Eucalyptus globulus, which are abundantly available in Pakistan, were selected in this study. Different extraction techniques including mechanical, soxhlet, reflux and ultrasonic extraction were used for the extraction of tannin from the selected barks. The medium of extraction included aqueous as well as different solvent mixtures in different ratios. The solvent mixtures used in this study were methanol-water and a

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20

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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21

Souza, Carla Giselly de, Severino Gonzaga Neto, Lara Toledo Henriques, Gherman Garcia Leal Araújo, Luciana Thie Seki Dias, and Ana Jaqueline Cavalcante Muniz. "Performance and blood parameters of Holstein/Zebu crossbred heifers fed with two tannins sources." Research, Society and Development 9, no. 2 (2020): e128922150. http://dx.doi.org/10.33448/rsd-v9i2.2150.

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The present research objective was to evaluate the performance and blood parameters of lactating cows fed with a diet of two tannin sources, based on sorghum (condensed tannin) with increasing concentrations of tannic acid (hydrolyzable tannin’s). Increasing levels of tannic acid in a sorghum-based diet for five Holstein/Zebu crossbred lactating cows were subject to a 5 × 5 Latin square experimental design. To assess the effect on cow intake, digestibility, milk production, and blood parameters. All cows received 9.87 kg/DM of corn silage as roughage and 6.38 kg of concentrate consisting of 2.

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Suhaimi, Muhammad Syafiq, Fayyadhah Asyiqin Zailani, Nur Farah Syuhada Mohd Zaki, Farizan Aris, Mohd Taufiq Mat Jalil, and Nurul Aili Zakaria. "Isolation and Identification of Tannin-Degrading Bacteria From Goat Feces, Ruminal Fluid, and Rumen Gut." Malaysian Applied Biology 53, no. 3 (2024): 23–37. http://dx.doi.org/10.55230/mabjournal.v53i3.2999.

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Tannins are toxic polyphenols present in various plants, contributing to microbial attacks and plant protection due to their astringence and bitter taste. However, high tannin inclusion in poultry diets will result in dyspepsia, hampering nutrient absorption and digestion. Interestingly, several bacteria occupying the rumen and gastrointestinal tract (GIT) of animals may tolerate tannins and degrade them by wielding tannase enzymes. The study aims to isolate and characterize potential tannin-degrading bacteria (TDB) from several ruminant specimens. The TDBs were isolated based on their tannin

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Arcuri, Pedro Braga, Michael Larry Thonney, Peter Schofield, and Alice Nelson Pell. "Polyethylene glycol and polyvinylpirrolidone effect on bacterial rRNA extraction and hybridization from cells exposed to tannins." Pesquisa Agropecuária Brasileira 38, no. 9 (2003): 1073–81. http://dx.doi.org/10.1590/s0100-204x2003000900008.

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In order to detect fluctuations in ruminal microbial populations due to forage tannins using 16S ribosomal RNA (rRNA) probes, recovery of intact rRNA is required. The objective of this work was to evaluate the effect of polyethylene glycol (PEG) and polyvinylpirrolidone (PVP) on extraction of bacterial rRNA, in the presence of tannins from tropical legume forages and other sources, that hybridize with oligonucleotide probes. Ruminococcus albus 8 cells were exposed to 8 g/L tannic acid or 1 g/L condensed tannins extracted from Acacia angustissima, banana (Musa sp.) skin, Desmodium ovalifolium,

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Makkar, H. P. S., and K. Becker. "Adaptation of cattle to tannins: rôle of proline-rich proteins in oak-fed cattle." Animal Science 67, no. 2 (1998): 277–81. http://dx.doi.org/10.1017/s1357729800010031.

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AbstractSaliva and faecal samples were collected from hill cattle (no. = 10) given tannin-rich oak (Quercus incana) leaves in the north-west Himalayan region of India. Amino acid composition of the saliva samples after thawing to remove precipitated proteins by centrifugation, and dialysis (molecular weight cut off: 3500) to remove small moieties revealed 6·4 (s.d. 0·6) % proline, 15·6 (s.d. 0·6) % glutamine plus glutamate and 9·2 (s.d. 1·0) % glycine on molar basis. For Holstein Friesian cattle (no. = 4) which had no history of consumption of tannin-containing foods, these values were 6·5 (s.

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Gloria Susan, Cherian, and Raja Madhan. "Bacterial Degradation of Bacteriostatic Polyphenols, Tannins." Journal of Natural Products and Resources 7, no. 2 (2021): 272–75. http://dx.doi.org/10.30799/jnpr.100.21070201.

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Tannin degradation by bacteria has not been studied much as tannins are commonly known to be bacteriostatic due to enzyme inhibition, substrate deprivation, and the enzyme activity on the bacterial cell wall. However, about a handful of bacteria have been found to tolerate certain concentrations of tannin. This study focuses on isolating and identifying bacteria from decaying portions of tree bark for tannase production and effective catalysis of ester bond hydrolysis in tannins. Different concentrations of commercial tannic acid were used as the sole carbon source on mineral salt medium (MSM)

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Dikatoru, Ravendha, Elok Widayanti, and Retno Ikayanti. "Analysis of Caffeine, Tannin and Total Phenol Content of Tea Leaves from Sirah Kencong Blitar Plantation." Indonesian Journal of Chemical Research 12, no. 2 (2024): 129–35. http://dx.doi.org/10.30598/ijcr.2024.12-rav.

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Caffeine, tannins, and total phenol are chemical components of tea leaves that are beneficial for the body. Caffeine is a psychoactive substance, tannin is anti-diarrhea, and phenol compounds are antioxidants that prevent free radicals. The purpose of this research was to analyze the levels of caffeine, tannin, and total phenol of tea leaves at Sirah Kencong Blitar Plantation. Determination of the caffeine level was carried out in tea leaves powder using UV-Vis Spectrophotometry method at 273.5 nm wavelength with caffeine as a standard. The determination of tannin and total phenol levels was c

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Štumpf, Sara, Gregor Hostnik, Mateja Primožič, Maja Leitgeb, and Urban Bren. "Generation Times of E. coli Prolong with Increasing Tannin Concentration while the Lag Phase Extends Exponentially." Plants 9, no. 12 (2020): 1680. http://dx.doi.org/10.3390/plants9121680.

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The current study examines the effect of tannins and tannin extracts on the lag phase duration, growth rate, and generation time of Escherichia coli. Effects of castalagin, vescalagin, gallic acid, Colistizer, tannic acid as well as chestnut, mimosa, and quebracho extracts were determined on E. coli’s growth phases using the broth microdilution method and obtained by turbidimetric measurements. E. coli responds to the stress caused by the investigated antimicrobial agents with reduced growth rates, longer generation times, and extended lag phases. Prolongation of the lag phase was relatively s

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Bobrov, Anatoly, Vasiliy D. Kravchenko, and Günter C. Müller. "Tannin-degrading bacteria with cellulase activity isolated from the cecum of the Qinghai-Tibet plateau zokor (Myospalax baileyi)." Israel Journal of Ecology and Evolution 61, no. 1 (2015): 21–27. http://dx.doi.org/10.1080/15659801.2015.1016863.

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Tannins, which are polyphenols present in various plants, have anti-nutritional activity; however, their negative effects are mitigated by the presence of tannin-degrading microorganisms in the gastrointestinal tract of animals. This has never been investigated in the plateau zokor (Myospalax baileyi) – the predominant small herbivore in the alpine meadow ecosystem of Qinghai Province, China – which consumes tannin-rich herbaceous plants. Tannase activity in the feces of the plateau zokor increased from June to August corresponding to the increase in hydrolyzable tannin concentrations in plant

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Słota, Patryk, Joanna Harasym, and Irena Jacukowicz-Sobala. "Supercritical Fluid Extraction—A Sustainable and Selective Alternative for Tannin Recovery from Biomass Resources." Applied Sciences 15, no. 11 (2025): 5914. https://doi.org/10.3390/app15115914.

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Tannins are structurally diverse polyphenols prized for their antioxidant and protein-binding properties, making them valuable in leather tanning, adhesives, coatings, and water treatment. This article compares research on conventional versus supercritical fluid extraction (SFE), which is recognized as an eco-friendly and efficient technique. While SFE using supercritical CO2 is already widely studied and commercially implemented for various botanical compounds, its application to tannin extraction remains in an earlier stage of development, with limited industrial solutions currently availabl

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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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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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Frutos, P., G. Hervás, F. J. Giráldez, and A. R. Mantecón. "An in vitro study on the ability of polyethylene glycol to inhibit the effect of quebracho tannins and tannic acid on rumen fermentation in sheep, goats, cows, and deer." Australian Journal of Agricultural Research 55, no. 11 (2004): 1125. http://dx.doi.org/10.1071/ar04058.

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Abstract. Batch cultures of rumen microorganisms, using rumen fluids from 4 ruminant species, sheep, goats, cows, and deer, were used to study the ability of polyethylene-glycol (PEG 6000) to inhibit the effect of 2 types of tannins, quebracho (QUE, a condensed tannin) and tannic acid (TA, a hydrolysable tannin) on several in vitro rumen fermentation characteristics. Both QUE and TA were able to impair ruminal fermentation (they reduced gas production, extent of degradation, ammonia-N, and volatile fatty acid concentrations, etc.; P < 0.05), with differences depending on the inoculum donor.

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Kurnianto, Afrizal Syifa, Anjasmara Wahyu Wicaksana, Muhammad Prima Putra, Ragil Yuliatmo, and Mohammad Zainal Abidin. "Unveiling the Potential of Secang (Caesalpinia sappan L.) as a Novel Tanning Agent: A Promising Alternative for the Leather Industry." Textile & Leather Review 7 (February 16, 2024): 222–34. http://dx.doi.org/10.31881/tlr.2023.194.

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The exploration of vegetable tanning's natural resources is fascinating as an alternative to basic chromium sulfate for its natural abundance and considerable environmental impact. In this work, an attempt has been made to extract vegetable tannin from Caesalpinia sappan L. bark using water as a solvent with different levels of temperatures and incubation times. The highest yield efficiency was observed at 80 °C for 4 hours. The presence of tannin content and polyphenolic compounds were screened by the phytochemical analysis using Iron (III) chloride (FeCl3), sodium hydroxide (NaOH), and ensur

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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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Mwangi, Sharif Zuberi, Valerian Cosmas Silayo, and Davis Naboth Chaula. "Optimization of Tannin’s Extraction from Cashew (Anacardium occidentale L.) Nut Testa for Use in Leather Tanning." Asian Journal of Applied Chemistry Research 15, no. 2 (2024): 7–16. http://dx.doi.org/10.9734/ajacr/2024/v15i2283.

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Extensive researches have been conducted over the years, focusing on the use of vegetable tannins to reduce pollution caused by mineral tanning. Vegetable tannins have been utilized commercially, but they remain costly and are not easily accessible. The purpose of this study was to optimize the tannin’s extraction from cashew (Anacardium occidentale L.) nut testa using water in order to determine their suitability in leather tanning. Samples of cashew nut testa were collected randomly from cashew nut processors in Mtwara region, Southern Tanzania. They were shade-dried and ground into powder.

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Subagyo, Yusuf, Mas Yedi Sumaryadi, Merryafinola Ifani, Hermawan Setyo Widodo, and Rizak Tiara Yusan. "The Comparison of Tannin Fractions in Calliandra calothyrsus Leaves Utilizing Butanol-HCl4 and Protein-Precipitation Methods." Molekul 19, no. 2 (2024): 209. http://dx.doi.org/10.20884/1.jm.2024.19.2.8636.

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ABSTRACT. Butanol-HCl4 (Bu-HCl4) and Protein-Precipitation (P-P) are methods that proposed to determine the content of free tannins, protein-bound tannins, and fiber-bound tannins. This study aims to determine the feasibility of tannin measurements by both methods and validation of Analytical Methods (VMA) evaluates specific parameters like accuracy, precision, specificity, and linearity through lab testing. The material used was twenty C. calothyrsus leaves which collected randomly from different trees. The samples were measured by both methods in triplicates for qantification and validation.

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Mulyani, Elly, Herlina Herlina, and Kurnia Suci. "Penetapan Kadar Tanin Ekstrak Daun Pagoda (Clerodendrum Paniculantum) Dengan Metode Spektrofotometri Visible Dan Titrasi Permanganometri." Lumbung Farmasi: Jurnal Ilmu Kefarmasian 3, no. 1 (2022): 7. http://dx.doi.org/10.31764/lf.v3i1.7034.

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ABSTRAKIndonesia merupakan negara yang memiliki beraneka ragam tanaman obat yang salah satunya adalah tanaman pagoda (Clerodenrum paniculantum). Daun Pagoda (Clerodenrum paniculantum) mengandung senyawa flavanoid, terpenoid, tanin, alkaloid, sterol dan glikosida. Uji identifikasi tanin dari ekstrak daun pagoda penelitian (Hafiz dkk, 2016) dan (Fitriana, 2018) menjelaskan bahwa daun pagoda positif mengandung senyawa tanin yang belum diketahui kadarnya. Oleh karena itu, peneliti melakukan penetapan kadar tanin pada daun pagoda(Clerodenrum paniculantum). Daun pagoda yang telah dikeringkan di estr

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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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Ethiraj, Sumathi, and Janarthanam Balasundaram. "Phytochemical and Biological Activity of Cucurbita Seed Extract." JOURNAL OF ADVANCES IN BIOTECHNOLOGY 6, no. 1 (2016): 813–21. http://dx.doi.org/10.24297/jbt.v6i1.4821.

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The present study was performed to investigate the phytochemical screening, total phenol, tannin content, antioxidant and antibacterial activity from seed extracts of Cucurbita pepo and Cucurbita maxima (Tindivanam). The phytochemical analysis revealed the presence of active ingredients such as steroids, cardioglycosides, phenols, terpenoids, alkaloids and tannins in the seed extract of Cucurbita pepo followed by Cucurbita maxima. Gallic acid (GA), Tannic acid (TA) and Butylated Hydroxy Toluene (BHT) were taken as standard in case of total phenol, tannin and antioxidant activity respectively.

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Degen, A. A., T. Mishorr, H. P. S. Makkar, et al. "Effect of Acacia saligna with and without administration of polyethylene glycol on dietary intake in desert sheep." Animal Science 67, no. 3 (1998): 491–98. http://dx.doi.org/10.1017/s1357729800032914.

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AbstractThe study was designed to measure (i) dry-matter intake (DMT) of sheep when diets including different tannins were offered and (ii) the effect of administration of polyethylene glycol (PEG), a tannin-binding agent, on DMI of tannin-rich diets. Acacia saligna phyllodes, a potential food for sheep, quebracho powder or tannic acid were added to a concentrate diet that served as a control and were offered to 16 ewe lambs (34·6 (s.d. 3·3) kg) that is, four lambs per diet. A. saligna has high levels of tannins; quebracho is a complex mixture of phenolic compounds in which condensed tannins p

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Bhushan, Bharat, M, R. Bhar, A. Kannan, Harisha M, Umesh B. U, and Venkatesha M.M. "Effect of physical treatments on phenolics and tannins in Ficus roxburghii and Quercus leucotrichophora leaves." International Journal of Agricultural and Applied Sciences 4, no. 1 (2023): 28–32. http://dx.doi.org/10.52804/ijaas2023.415.

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Inadequate availability of straws and conventional concentrates is one of the major constraints for rearing large and small ruminants. Alternative or unconventional fodder resources play a supplementary role in meeting the demand of livestock owners; but these tree leaves contain some antinutritional factors. Tremal (Ficus roxburghii) and Oak (Quercus leucotrichophora) are among the traditional tree fodder sources available in the North Western Himalayan region. Their use a feed stuff for livestock is limited due to presence of tannis. So, the study was undertaken to assess the effect of diffe

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Bueno, I. C. S., S. L. S. Cabral Filho, E. F. Nozella, et al. "Bioassay for measuring tannin effects based on gas production technique. 2. Dosage of polyethylene glycol." Proceedings of the British Society of Animal Science 2005 (2005): 216. http://dx.doi.org/10.1017/s1752756200011273.

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Tannins are secondary compounds that can bind protein and other nutrients and reduce their availability to the animals. Polyethylene glycol (PEG) has a great affinity with tannins and when it is added to the feed it is bound to tannins and releases the protein and other nutrients. There is no information about the amount of PEG that is needed to obtain the maximum precipitation of tannin and the minimum tannin effect. Some assays are conduced using doses of PEG according to the tannin content, but the activity of tannins can vary and this imply that the tannin analysis has to be done prior. Th

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Costa, Antonio, Nazareth Fonseca, Sheyla Carvalho, et al. "Archaeometric investigations on naturally and thermally-aged iron-gall inks using different tannin sources." Open Chemistry 11, no. 11 (2013): 1729–39. http://dx.doi.org/10.2478/s11532-013-0303-7.

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AbstractThis paper investigates the behavior of paper strips containing iron-gall inks prepared with tannins from different sources, subjected to natural and thermally-induced aging. Results indicate that inks containing initial concentrations of ferrous sulphate ranging from 0.2 to 10.0 g are amenable to treatment with calcium phytate, and thata good correlation exists between the recovery of excess iron and the initial concentration. Infrared spectra showed an absorption band at 1,750 cm−1, typical of esther, solely in the samples prepared with a condensed tannin. The condensed nature of thi

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McSweeney, Christopher S., Brian Palmer, Rowan Bunch, and Denis O. Krause. "Isolation and Characterization of Proteolytic Ruminal Bacteria from Sheep and Goats Fed the Tannin-Containing Shrub Legume Calliandra calothyrsus." Applied and Environmental Microbiology 65, no. 7 (1999): 3075–83. http://dx.doi.org/10.1128/aem.65.7.3075-3083.1999.

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ABSTRACT Tannins in forages complex with protein and reduce the availability of nitrogen to ruminants. Ruminal bacteria that ferment protein or peptides in the presence of tannins may benefit digestion of these diets. Bacteria from the rumina of sheep and goats fed Calliandra calothyrsus (3.6% N and 6% condensed tannin) were isolated on proteinaceous agar medium overlaid with either condensed (calliandra tannin) or hydrolyzable (tannic acid) tannin. Fifteen genotypes were identified, based on 16S ribosomal DNA-restriction fragment length polymorphism analysis, and all were proteolytic and ferm

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Haroun, Mahdi. "COMPLEMENTARY ANALYTICAL TECHNIQUES PAPER, THIN-LAYER, HIDE-POWER, AND COMBINED METHODS FOR CHARACTERIZATIONOF TANNIN IN PLANTS." International Journal of Advanced Research 9, no. 10 (2021): 777–85. http://dx.doi.org/10.21474/ijar01/13610.

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The polyphenolic compoundsextract rich in gallo-catechol tannins submitted to complementary analytical techniqueswas evaluated. The whole plantspecies screened were of the condensed type except Acacia seyal var. fistuala, Acaciaseyal var. seyal, Casuarina equistifolia, and Pithecellobium dulcewere of mixedhydrolysable-condensed(gallo-catechol) type. The quantitative data indicated that 5 parts (bark) out of 12 species, when extracted, contained more than 10% tannins (oven-dry basis), the level of commercial interest. The catechin numbers indicated that all the studied species contained condens

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Khairunnisa, Amalia, Fadlilaturrahmah Fadlilaturrahmah, and Septiany Septiany. "Determination of SPF Value and Total Tannin in Ethyl Acetate Fraction of Peronema canescens Jack." Jurnal Pharmascience 10, no. 2 (2023): 378. http://dx.doi.org/10.20527/jps.v10i2.16484.

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Daun Sungkai (Peronema canescens Jack) mengandung metabolit sekunder antara lain tannin, alkaloid, terpenoid, steroid, dan flavonoid. P. canescens merupakan tanaman asli Kalimantan Selatan yang berpotensi sebagai perawatan kulit alami berdasarkarkan kandungan tannin yang memiliki aktivitas antioksidan sehingga dapat dikembangkan sebagai produk tabir surya. Penelitian ini bertujuan untuk menentukan nilai SPF dan tannin total fraksi etil asetat daun Sungkai (P. canescens) menggunakan spektrofotometri UV-Vis. Metode ekstraksi dilakukan dengan maserasi menggunakan etanol 96% dan penggunaan fraksi

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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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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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Datu, Fransiska N. S., Hasri Hasri, and Diana Eka Pratiwi. "Identifikasi dan Uji Kestabilan Tanin dari Daging Biji Pangi (Pangium edule Reinw.) sebagai Bahan Pewarna Alami." Chemica: Jurnal Ilmiah Kimia dan Pendidikan Kimia 22, no. 1 (2021): 29. http://dx.doi.org/10.35580/chemica.v22i1.21726.

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ABSTRAKPenelitian ini adalah penelitian eksplorasi untuk mengetahui jenis tanin, penetapan kadar tanin dan uji kestabilan tanin dari daging biji Pangi (Pangium edule Reinw.) dengan metode spektrofotometri menggunakan UV-VIS. Daging biji pangi diekstraksi dengan etanol 70%. Hasil uji kualitatif menggunakan pereaksi FeCl3 1%, Asam Asetat 10%, Pb Asetat 10%, HCl, Bromine, dan Tes Katekin, menunjukkan daging biji pangi termasuk jenis tanin terhidrolisis dengan kadar tanin rata-rata 15,54 % dan stabil pada suhu 80 – 100 ºC. Kata kunci : Pangium edule Reinw., Kadar Tanin, Spektrofotometri, UV-VIS AB

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Adegbusi, Halid Sheriff, Ismail Amin, Norhaizan Mohd Esa, and Zulfitri Azuan Mat Daud. "Application of Folin-Ciocalteau colorimetric method in the determination of total tannin in maize and soybean food products." International Food Research Journal 29, no. 5 (2022): 1110–19. http://dx.doi.org/10.47836/ifrj.29.5.13.

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Yellow maize (Zea mays L.) and soybean (Glycine max (L.) Merr.) are local raw materials used in the formulation of complementary foods in Nigeria. The presence of antinutritional factors such as tannins in them could disrupt the nutritional status in infants and young children, thus leading to malnutrition. However, data on the total tannin contents in maize, soybean, and their products remain limited. This could be due to the lack of a fast, accurate, and inexpensive analytical method for tannin determination. The present work thus evaluated the Folin-Ciocalteu (FC) assay for the accurate qua

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