Статті в журналах: "Mimosa tannin"

1

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% with a tanning strength of 2.82. Both coffee arabica pulp and mimosa exceeded the 1.5 tanning strength recommended for tanning agents. It was concluded that coffee arabica pulp sufficient tanning strength to be used as a tanning material.

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Ibrahim, Shehu Lurwanu, and Abubeker Hassen. "Characterization, Density and In Vitro Controlled Release Properties of Mimosa (Acacia mearnsii) Tannin Encapsulated in Palm and Sunflower Oils." Animals 11, no. 10 (October 9, 2021): 2919. http://dx.doi.org/10.3390/ani11102919.

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Tannin has gained wider acceptance as a dietary supplement in contemporary animal nutrition investigations because of its potential to reduce enteric methane emission. However, a major drawback to dietary tannin intake is the bitter taste and instability in the gastrointestinal tract (GIT). The utilization of fats as coating materials will ensure appropriate masking of the tannin’s aversive taste and its delivery to the target site. The aims of this study were to encapsulate mimosa tannin with palm oil or sunflower oil, and to assess the microcapsules in terms of encapsulation efficiency, morphology, density, and in vitro release of tannin in media simulating the rumen (pH 5.6), abomasum (pH 2.9) and small intestine (pH 7.4). The microencapsulation of mimosa tannin in palm or sunflower oils was accomplished using a double emulsion technique. The results revealed that encapsulated mimosa tannins in palm oil (EMTP) and sunflower oil (EMTS) had high yields (59% vs. 58%) and encapsulation efficiencies (70% vs. 68%), respectively. Compared to unencapsulated mimosa tannin (UMT), the morphology showed that the encapsulated tannins were smaller in size and spherical in shape. The UMT had (p < 0.01) higher particle density (1.44 g/cm3) compared to 1.22 g/cm3 and 1.21 g/cm3 for the EMTS and EMTP, respectively. The proportion of tannins released by the UMT after 24 h in the rumen (94%), abomasum (92%) and small intestine (96%) simulated buffers, reduced (p < 0.01) to 24%, 21% and 19% for the EMTS and 18%, 20% and 16% for the EMTP in similar media and timeframe. The release kinetics for the encapsulated tannins was slow and steady, thus, best fitted by the Higuchi model while the UMT dissolved quickly, hence, only fitted to a First order model. Sequential tannin release also indicated that the EMTS and EMTP were stable across the GIT. It was concluded that the microencapsulation of mimosa tannin in palm or sunflower oils stabilized tannins release in the GIT simulated buffers with the potential to modify rumen fermentation. Further studies should be conducted on the palm and sunflower oils microcapsules’ lipid stability, fatty acid transfer rate in the GIT and antioxidant properties of the encapsulated tannins.

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Jouali, Abdelhadi, Anas Salhi, Abdelkahhar Aguedach, El Kbir Lhadi, Mohammed El Krati, and Soufiane Tahiri. "Photo-catalytic degradation of polyphenolic tannins in continuous-flow reactor using titanium dioxide immobilized on a cellulosic material." Water Science and Technology 82, no. 7 (September 2, 2020): 1454–66. http://dx.doi.org/10.2166/wst.2020.420.

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Abstract Tannins are recalcitrant polyphenolic molecules that resist microbial attack. Their main environmental damage is due to their low biodegradability. This work aims to investigate the photo-catalytic degradation of two commercial tannin extracts, chestnut (hydrolysable tannin) and mimosa (condensed tannin). The experiments were carried out under UV-light irradiation in a continuous-flow reactor using titanium dioxide (TiO2) immobilized on cellulosic fibers. It was highlighted that photo-catalytic degradation is unfavourable in acidic medium and when the pH is too high (pH above 12); it reaches its maximum efficiency at pH 7.5 (99 and 97% for chestnut and mimosa, respectively). Nearly complete degradation of tannins requires an irradiation period of 6 h. The process efficiency is inversely affected by the concentration of tannins essentially above 75 mg/L for chestnut and 60 mg/L for mimosa. Above 240 mL/min, any increase in feed flow negatively affects the performance of the process. Furthermore, a significant decrease of treatment efficiency was seen when increasing the concentration of ethanol and salts in the medium. Obtained results suggest that UV-light irradiation in a continuous-flow photo-reactor using immobilized TiO2 may be considered as an adequate process for the treatment of water containing recalcitrant tannin molecules.

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Ibrahim, Shehu Lurwanu, and Abubeker Hassen. "Effects of Graded Levels of Mimosa (Acacia mearnsii) Tannin Purified with Organic Solvents on Gas, Methane, and In Vitro Organic Matter Digestibility of Eragrostis curvula Hay." Animals 12, no. 5 (February 23, 2022): 562. http://dx.doi.org/10.3390/ani12050562.

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The higher contribution of methane (CH4) to global anthropogenic potential is a cause of concern to livestock producers. Mimosa tannin gained recent acceptance as an additive for enteric CH4 mitigation. However, rumen fermentation and digestibility are compromised when large quantities of tannins are supplemented due to the presence of hydrolysable tannin and other non-tannin molecules in mimosa extract, which are toxic to animals. Purification could eliminate the toxins, and thus, reduce the CH4 yield without negative effects on rumen microbial activities and organic matter degradation. The Soxhlet extraction method was used to purify the tannin using organic solvents (ethyl acetate and pentanol). The unpurified, ethyl acetate purified, and pentanol purified tannins at the dosages of 10, 20, 30, and 40 g/kg DM of substrate (Eragrostis curvula hay) were evaluated for gas, CH4, and in vitro organic matter digestibility (IVOMD) in comparison with substrate alone. Gas kinetics were tested using a simple exponential model with lag. The results showed that compared with control, gas, CH4, IVOMD, CH4/gas, CH4/IVOMD, gas/IVOMD, asymptotic gas volume (v), and rate of gas production (k) decreased (p < 0.01) linearly with the increase in the inclusion levels of all tannin extracts. Also, ethyl acetate purified and pentanol purified tannin extracts reduced gas and CH4 at lower dosage (30 g/kg DM) compared to unpurified tannin extract at a higher level (40 g/kg). Pentanol purified tannin was more effective at lower dosage (20 g/kg DM) in terms of CH4/gas and CH4/IVOMD. It was concluded that the purification of mimosa tannin with ethyl acetate and pentanol reduced potential gas production and CH4 without much reduction in substrate digestibility when up to 30 g/kg DM of feed was used. Lower inclusion levels of ethyl acetate and pentanol purified extracts could give a similar result with a higher dosage of unpurified tannin.

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5

Deschamps, A. M. "Évaluation de la dégradation de deux types de tanin condensé par des bactéries isolées d'écorces en décomposition." Canadian Journal of Microbiology 31, no. 5 (May 1, 1985): 499–502. http://dx.doi.org/10.1139/m85-092.

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Forty-eight bacterial strains isolated from decaying bark were cultivated in a mineral medium with added quebracho and mimosa tannin extracts as carbon sources. The degradation of the two condensed tannins by each bacterial strain was compared by means of two dosage methods permitting estimations of the astringent capacity losses and the attack of the flavane-3-ols groups. For an even incubation period, tannin from mimosa was more strongly degraded than that from quebracho, and depolymerization was much more important than the attack of monomeric structures. These results confirmed the aptitude of those bacteria to degrade condensed tannins, and thus practical utilisation can be foreseen for such strains.[Translated by the journal]

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MIN, BYENG R., WILLIAM E. PINCHAK, ROBIN C. ANDERSON, and TODD R. CALLAWAY. "Effect of Tannins on the In Vitro Growth of Escherichia coli O157:H7 and In Vivo Growth of Generic Escherichia coli Excreted from Steers." Journal of Food Protection 70, no. 3 (March 1, 2007): 543–50. http://dx.doi.org/10.4315/0362-028x-70.3.543.

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The effect of commercially available chestnut and mimosa tannins in vitro (experiment 1) or in vivo (experiment 2) on the growth or recovery of Escherichia coli O157:H7 or generic fecal E. coli was evaluated. In experiment 1, the mean growth rate of E. coli O157:H7, determined via the measurement of optical density at 600 nm during anaerobic culture in tryptic soy broth at 37°C, was reduced (P < 0.05) with as little as 400 μg of either tannin extract per ml of culture fluid. The addition of 200, 400, 600, 800, and 1,200 μg of tannins per ml significantly (P < 0.01) reduced the specific bacterial growth rate when compared with the nontannin control. The specific growth rate decreased with increasing dose levels up to 800 μg of tannins per ml. Bacterial growth inhibition effects in chestnut tannins were less pronounced than in mimosa tannins. Chestnut tannin extract addition ranged from 0 to 1,200 μg/ml, and a linear effect (P < 0.05) was observed in cultures incubated for 6 h against the recovery of viable cells, determined via the plating of each strain onto MacConkey agar, of E. coli O157:H7 strains 933 and 86-24, but not against strain 6058. Similar tests with mimosa tannin extract showed a linear effect (P < 0.05) against the recovery of E. coli O157:H7 strain 933 only. The bactericidal effect observed in cultures incubated for 24 h with the tannin preparations was similar, although it was less than that observed from cultures incubated for 6 h. When chestnut tannins (15 g of tannins per day) were infused intraruminally to steers fed a Bermuda grass hay diet in experiment 2, fecal E. coli shedding was lower on days 3 (P < 0.03), 12 (P = 0.08), and 15 (P < 0.001) when compared with animals that were fed a similar diet without tannin supplementation. It was concluded that dietary levels and sources of tannins potentially reduce the shedding of E. coli from the gastrointestinal tract.

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BHATTA, R., O. ENISHI, Y. YABUMOTO, I. NONAKA, N. TAKUSARI, K. HIGUCHI, K. TAJIMA, A. TAKENAKA, and M. KURIHARA. "Methane reduction and energy partitioning in goats fed two concentrations of tannin from Mimosa spp." Journal of Agricultural Science 151, no. 1 (April 12, 2012): 119–28. http://dx.doi.org/10.1017/s0021859612000299.

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SUMMARYDietary manipulation is one promising approach to reducing methane (CH4) emissions from forage-fed ruminants. Studies were conducted to evaluate the effects of feeding two concentrations of tannins from Mimosa spp. on rumen fermentation, methanogenesis and energy partitioning in goats. Adult male goats were used in three trials where three diets with increasing concentrations of tannins (control, low-tannin and high-tannin) were fed in a switch-over design. The control diet consisted of 0·65 timothy hay, 0·20 crushed maize and 0·15 soybean meal; low- and high-tannin diets contained 0·975 and 0·950 of the control diet, respectively, mixed with 0·025 and 0·050 of a commercial compound containing tannins with mean crude protein (CP) of 147 g/kg dry matter (DM) and gross energy (GE) 19 MJ/kg DM, respectively. Total contents (DM basis) of tannins (hydrolysable and condensed) in the control, low- and high-tannin diets were 0, 2·8 and 5·6 g/kg DM, respectively. The tannin source contained 37 and 76 g/kg DM of condensed and hydrolysable tannins, respectively (DM basis). The DM (664 g/d) and GE intakes (19·0 MJ/d) were similar among diet groups. Digestibilities of all dietary components in the high-tannin diet were lower (P < 0·05) than low-tannin and control diets. The faecal energy (MJ/d) output was lowest in the control diet (3·49) and increased (P < 0·05) in tannin-fed goats (3·80; 4·87) resulting in a corresponding decrease in digestible energy (DE). Methane emission, expressed both on absolute and per unit of feed intake basis, decreased (P < 0·05) with increasing concentration of tannins in the diet. For example, CH4 energy excretion was 0·98, 0·87 and 0·76 MJ/d for goats on control, low- and high-tannin diets, respectively, whereas their corresponding values for CH4 conversion ratio were 0·079, 0·069 and 0·060 of GE intake. These results suggest that natural tannins, even at a low concentration (2·8 g/kg DM of the diet), reduce CH4 emissions, and tree leaves containing appreciable amounts of tannins may potentially be exploited as natural feed additives in ruminants.

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8

Ramadhan, Yanuar Bekti, Aida Nur Sabrina, and Endang Kwartiningsih. "Biosorption of Chromium from Textile Wastewater Using Mimosa pudica Tannin Gel." Equilibrium Journal of Chemical Engineering 5, no. 1 (August 9, 2021): 51. http://dx.doi.org/10.20961/equilibrium.v5i1.54012.

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The heavy metal content is very dangerous because it can pollute the environment. One of the heavy metals waste commonly found in the textile industry is chromium (Cr). Mimosa pudica is a weed plant and its availability is very abundant. However, it also contains tannin which can be developed into tannin gel biosorbent to adsorption heavy metal content in the wastewater. The purpose of this research is to study Mimosa pudica tannin as a Cr biosorbent from textile wastewater. There are two steps to synthesis tannin gel biosorbent. They are the tannin extraction and the condensation polymerization process. Tannin is easily soluble in water so the condensation polymerization process is needed to make it insoluble in water. The extraction of Mimosa pudica tannin was done using water solvent. The condensation polymerization process was done by the reaction of tannin extract and formaldehyde. The Cr content of textile industry wastewater in the Pasar Kliwon, Surakarta was 4 ppm. The results of the biosorption of Cr heavy metal using Mimosa pudica tannin gel showed that the remaining Cr heavy metal was 0.7098 ppm. It was already below the threshold which was 1 ppm. Keywords: biosorption, condensation polymerization, extraction, Mimosa pudica, tannin gel

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Souza, Diná Garcia de, Débora Baiocchi Princivalli Campos, João Gilberto Mesa Ucella Filho, João Paulo Silva Gomes, and Tatiane Kelly Barbosa Azêvedo. "QUANTIFICAÇÃO DE TANINOS PRESENTES NA CASCA DA Mimosa caealpiniifolia Benth. E SUA UTILIZAÇÃO NO TRATAMENTO DE EFLUENTES." Nativa 7, no. 6 (November 11, 2019): 789. http://dx.doi.org/10.31413/nativa.v7i6.8631.

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Este estudo teve por objetivo analisar as concentrações de taninos existentes na casca das árvores da Mimosa caealpiniifolia Benth., e seu potencial para tratamentos de efluentes. As cascas foram retiradas de cinco árvores de uma área experimental localizada na Universidade Federal do Rio Grande do Norte, Campus Macaíba. Estas foram secas e moídas para redução de sua granulometria. Em seguida foram realizados a extração dos taninos e determinação do teor de sólidos totais (TST), teor de taninos condensados (TTC) e índice de Stiasny (I). Para caracterização do efluente foi analisado o índice de turbidez/NTU, pH inicial e cor aparente. O valor médio encontrado para TST, I e TTC foram, respectivamente, 11,30, 71,43 e 6,56%. O índice de turbidez/NTU e pH, encontrados foram 1,77 e 5, respectivamente. Os taninos sem modificações químicas têm pouca eficiência na remoção de turbidez, no entanto, foi comprovado que o tanino possui aptidão a coagular.Palavras-chave: coagulante; floculação; substâncias tânicas; Caatinga. QUANTIFICATION OF TANNINS PRESENT IN THE BARK OF Mimosa caealpiniifolia Benth. AND ITS USE IN EFFLUENT TREATMENT ABSTRACT: This study aimed to analyze the concentrations of tannins in the bark of Mimosa caealpiniifolia Benth. trees, and their potential for effluent treatment. The bark was removed from five trees in an experimental area located at the Federal University of Rio Grande do Norte, Campus Macaíba. They were dried and ground to reduce their granulometry. Next, tannin extraction and determination of total solids content (TST), condensed tannin content (TTC) and Stiasny index (I) were performed. To characterize the effluent, the turbidity index/NTU, initial pH and apparent color were analyzed. The mean value found for TST, I and TTC were, respectively, 11.30, 71.43 and 6.56%. The turbidity/NTU and pH index found were 1.77 and 5, respectively. The tannin without chemical modifications has little efficiency in removing turbidity, however, it has been proven that the tannin has ability to coagulate.Keywords: coagulant; flocculation; tannic substances; Caatinga.

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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 (December 1, 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 small at low tannin concentrations, while it became more pronounced at concentrations above half the MIC. Moreover, for the first time, it was observed that lag time extensions follow a strict exponential relationship with increasing tannin concentrations. This feature is very likely a direct consequence of the tannin complexation of certain essential ions from the growth medium, making them unavailable to E. coli for its growth.

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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 (December 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 composition of purified tannins by a high-performance liquid chromatograph with delphinidin, cyanidin and pelargonidin as standards. Concentration and astringency of purified condensed tannins, as well as their monomeric composition varied between species, and in some cases among phenological cycles. The values observed were always above the limits considered beneficial for ruminal digestion (i.e. 5%). Jurema Preta presented the highest values (30.98% TT and 22% astringency at full growth stage), and Mororó the lowest (10.38% TT and 14% astringency during fructification). Jurema Preta presented a mean relationship prodelfinidin (PD): procyanidin (PC) of 97:3, which did not vary during the phenological cycle, showing the high astringent capacity of these tannins. Sabiá presented a relationship of 90:20 during full growth and flowering stages, decreasing to 40:50 at fructification. In Mororó the PD:PC relationship was more equilibrated, around 40:50 during full growth and flowering stages, decreasing to 35:60 During fructification. Propelargonidin was not detected or was present at low concentration in the three species.

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Tahir, P. Md, O. C. Musgrave, and Z. Ashaari. "Determination of Polyphenolic Content of Bark Extracts for Wood Adhesives." Holzforschung 56, no. 3 (April 29, 2002): 267–72. http://dx.doi.org/10.1515/hf.2002.044.

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Summary The phenolic content of condensed tannins varies considerably, depending on the method of determination. Even though the Stiasny precipitation number has been commonly used to estimate the amount of reactive tannin towards formaldehyde, particularly in adhesive applications, this estimation alone is not sufficient. In this study two methods of determining the amount of reactive tannin towards formaldehyde were examined. These were (1) the reactivity towards formaldehyde or the Stiasny precipitation number, and (2) the formaldehyde uptake. Five different types of tannin were examined from Rhizophora mucronata, P. radiata, mimosa, quebracho and chestnut. The study indicates that the phenolic content in tannin can be better estimated by determining both the Stiasny number and the amount of formaldehyde uptake. High correlation (r2 = 0.905) was detected between the two methods. The study also revealed that hot water extracts of R. mucronata contain relatively small amounts of reactive polyphenols and are less reactive than sulfite extracts. The consumption of formaldehyde by this type of tannin was only 0.294 molecules per flavanoid unit. Similar to R. mucronata, the sulfite extracts of P. radiata contain relatively high amounts of reactive polyphenols and reacted with substantially higher amounts of formaldehyde per flavanoid unit, comparable to mimosa and quebracho tannins. Nonetheless, the reactivity towards formaldehyde (gel time) of the latter tannins is muchlower, despite their higher polyphenolic content. Of the two methods used to estimate the polyphenolic content of bark extracts, the Stiasny number had a relatively higher correlation (r2 = 0.518) with gel time than formaldehyde uptake (r2 = 0.345) did. The behaviour of these tannins in relation to their reactivity and chemical structures is discussed.

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Calegari, Leandro, Pedro Jorge Goes Lopes, Elisabeth De Oliveira, Darci Alberto Gatto, and Diego Martins Stangerlin. "Quantificação de taninos nas cascas de jurema-preta e acácia-negra." Pesquisa Florestal Brasileira 36, no. 85 (March 31, 2016): 61. http://dx.doi.org/10.4336/2016.pfb.36.85.986.

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Em função de sua complexidade química, há diversas metodologias de quantificação dos taninos vegetais. Neste sentido, o presente estudo teve como objetivo quantificar as substâncias tânicas e não-tânicas presentes nas cascas de jurema-preta (Mimosa tenuiflora) e de acácia-negra (Acacia mearnsii) por dois métodos distintos. A partir das partículas de casca de ambas as espécies, foram geradas soluções analíticas utilizando um extrator do tipo camisa de vapor, sendo a solução analisada pelos métodos de Stiasny e do pó de pele (não cromado). Para ambas as espécies, os teores de tânicos foram superiores quando analisados pelo método de pó de pele, atingindo 47,8 e 24,1% para A. mearnsii e M. tenuiflora, respectivamente. Pelo método de Stiasny, o teor de taninos condensados foi de 39,0% para A. mearnsii e 15,5% para M. tenuiflora. Apesar dos melhores resultados obtidos para a A. mearnsii, a casca de M. tenuiflora também apresentou grande potencialidade em função da considerável quantidade de tânicos e da disponibilidade da espécie no bioma Caatinga. Tannins quantification in barks of Mimosa tenuiflora and Acacia mearnsiiDue to its chemical complexity, there are several methodologies for vegetable tannins quantification. Thus, this work aims at quantifying both tannin and non-tannin substances present in the barks of Mimosa tenuiflora and Acacia mearnsii by two different methods. From bark particles of both species, analytical solutions were produced by using a steam-jacketed extractor. The solution was analyzed by Stiasny and hide-powder (no chromed) methods. For both species, tannin levels were superior when analyzed by hide-powder method, reaching 47.8% and 24.1% for A. mearnsii and M. tenuiflora, respectively. By Stiasny method, the tannins levels considered were 39.0% for A. mearnsii, and 15.5% for M. tenuiflora. Despite the best results presented by A. mearnsii, the bark of M. tenuiflora also showed great potential due to its considerable amount of tannin and the availability of the species at Caatinga biome.Index terms: Gravimetric method; Stiasny; ALCA extractor

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Abdullah, Ummi Hani, A. Pizzi, K. Rode, L. Delmotte, X. Zhou, and H. R. Mansouri. "Mimosa tannin resins for impregnated paper overlays." European Journal of Wood and Wood Products 71, no. 2 (December 6, 2012): 153–62. http://dx.doi.org/10.1007/s00107-012-0652-5.

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Calegari, Leandro, Pedro Jorge Goes Lopes, Gregório Mateus Santana, Diego Martins Stangerlin, Elisabeth De Oliveira, and Darci Alberto Gatto. "EFICIÊNCIA DE EXTRATO TÂNICO COMBINADO OU NÃO COM ÁCIDO BÓRICO NA PROTEÇÃO DA MADEIRA DE Ceiba pentandra CONTRA CUPIM XILÓFAGO." FLORESTA 44, no. 1 (January 8, 2014): 43. http://dx.doi.org/10.5380/rf.v44i1.28798.

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Dentre os métodos que vêm sendo testados para minimizar a lixiviação de compostos de boro na madeira, destaca-se sua combinação com taninos vegetais. Aos taninos vegetais é atribuída a durabilidade natural da madeira de algumas espécies, indicando sua potencialidade como preservativo natural. Neste estudo, avaliou-se o rendimento de taninos condensados provenientes da casca de Mimosa tenuiflora em extração realizada com água destilada, comparando-o ao da extração envolvendo a inclusão de sulfito de sódio, assim como a eficiência de extratos tânicos sulfitados, combinados ou não com ácido bórico, na melhoria da resistência da madeira de Ceiba pentandra ao térmita xilófago Nasutitermes corniger, por meio de ensaio de preferência alimentar. Extrato tânico obtido com a inclusão de sulfito de sódio à água teve melhor rendimento em taninos condensados. De maneira geral, a impregnação da madeira com o extrato tânico sulfitado proporcionou o mesmo comportamento quando comparada à aplicação do ácido bórico, sendo os melhores resultados verificados quando ambos foram utilizados conjuntamente. No entanto, depois de aplicado na madeira, o extrato tânico foi lixiviado e não favoreceu a redução da lixiviação do ácido bórico. Apesar da potencialidade do uso do extrato tânico ao cupim xilófago, estudos adicionais fazem-se necessários.Palavras-chave: Biodeterioração da madeira; térmitas xilófagos; Nasutitermes corniger. AbstractTannic extract efficiency combined or not with boric acid on protection of Ceiba pentandra wood against xylophagous termite. Among the methods tested to reduce the leaching of boron compounds in wood, it can be highlighted their combination with vegetable tannins. It is attributed the natural durability of some species of wood to vegetable tannins, pointing to their potentiality as natural wood preservatives. This research evaluated the efficiency of condensed tannins from bark of Mimosa tenuiflora extract with distilled water, compared to another extract added of sodium sulfite. It also evaluated the efficiency of sulfited tannin extracts, combined or not with boric acid in order to improve the resistance of Ceiba pentandra against the xylophagous termite Nasutitermes corniger by feeding test. Tannic extract obtained by adding sodium sulfite to distilled water revealed better yield compared to condensed tannin extraction. In general, impregnation of wood with tannin extract presented the same behavior as compared to application of boric acid, with best results observed when both them were simultaneously used. However, after applied to wood, tannin extracted was leachable and it did not favor the boric acid leaching. Despite the potential use of tannic extract against the xylophagous termite, additional studies are required for a best evaluation.Keywords: Wood biodeterioration; xilophogous termites; Nasutitermes corniger.

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Abdullah, U. H., A. Pizzi, and X. Zhou. "High pressure paper laminates from mimosa tannin resin." International Wood Products Journal 5, no. 4 (October 30, 2014): 224–27. http://dx.doi.org/10.1179/2042645314y.0000000082.

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Rhazi, Naima, Mina Oumam, Abdessadek Sesbou, Hassan Hannache, and Fatima Charrier-El Bouhtoury. "Physico-mechanical properties of plywood bonded with ecological adhesives from Acacia mollissima tannins and lignosulfonates." European Physical Journal Applied Physics 78, no. 3 (June 2017): 34813. http://dx.doi.org/10.1051/epjap/2017170067.

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The objective of this research was to develop ecological adhesives for bonding plywood panels using lignosulfonates, a common waste product of the wood pulp industry, and natural tannin extracted from Moroccan bark of Acacia mollissima using different process. Natural tannin and lignin were used in wood adhesives formulation to substitute resins based on phenol and formaldehyde. To achieve this, the lignosulfonates were glyoxalated to enhance their reactivity and the used tannins obtained by three different extraction methods were compared with commercial mimosa tannin. The proportion of Acacia mollissima tannins and lignosulfonates, the pressing time, the pressing temperature, and the pressure used were studied to improve mechanical properties, and bonding quality of plywood panel. The properties of plywood panels produced with these adhesives were tested in accordance with normative tests. Thus, the tensile strength, and the shear strength were measured. The results showed that the performance of the plywood panels made using biobased tannin adhesives was influenced by physical conditions such as pressure, press temperature as well as by chemical conditions, such as the tannin-lignin ratio. It exhibited excellent mechanical properties comparable to commercially available phenol-formaldehyde plywood adhesives. This study showed that biobased adhesives formulations presented good and higher mechanical performance and no formaldehyde emission.

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Štumpf, Sara, Gregor Hostnik, Mateja Primožič, Maja Leitgeb, Juha-Pekka Salminen, and Urban Bren. "The Effect of Growth Medium Strength on Minimum Inhibitory Concentrations of Tannins and Tannin Extracts against E. coli." Molecules 25, no. 12 (June 26, 2020): 2947. http://dx.doi.org/10.3390/molecules25122947.

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In this study the effect of growth medium strength on the minimum inhibitory concentration (MIC) of different tannins and tannin extracts against Escherichia coli was systematically investigated for the first time. Three pure compounds (vescalagin, castalagin and gallic acid) and five extracts (chestnut, quebracho, mimosa, Colistizer and tannic acid) were studied. Broth microdilution was assayed and bacteria were grown using different growth medium strengths varying from half to double the concentration recommended by the producer. MICs were determined using the iodonitrotetrazolium chloride (INT) dye or turbidity measurements. It was observed that MIC values depend on the growth medium strength. With an increase in the growth medium concentration MIC values rose roughly linearly for all samples, while their relative order remained unchanged, indicating that a direct interaction of tannins with growth medium nutrients represents the likely source of their antimicrobial activity. Understanding the effect of growth medium strength can finally yield a plausible explanation for the observed variation in MIC values reported in the scientific literature as well as provide help in planning proper applications of tannins in the livestock production.

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Vejayan, J., A. Jamunaa, I. Halijah, and S. Ambu. "Adverse Effects of Tannin Contained in Mimosa pudica Root Extract." Journal of Applied Sciences 16, no. 10 (September 15, 2016): 477–83. http://dx.doi.org/10.3923/jas.2016.477.483.

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Peña, C., K. de la Caba, A. Retegi, C. Ocando, J. Labidi, J. M. Echeverria, and I. Mondragon. "Mimosa and chestnut tannin extracts reacted with hexamine in solution." Journal of Thermal Analysis and Calorimetry 96, no. 2 (February 4, 2009): 515–21. http://dx.doi.org/10.1007/s10973-007-8352-9.

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Caldas, Ana Carolina, José Pereira Filho, Daniel Menezes, Iara Cavalcante, Joyce Fernandes, Juliana Oliveira, Ronaldo Oliveira, Jose Fabio Moura, and Leilson Bezerra. "Tannins from Mimosa tenuiflora in the diet improves nutrient utilisation, animal performance, carcass traits and commercial cuts of lambs." Animal Production Science 61, no. 13 (2021): 1373. http://dx.doi.org/10.1071/an20468.

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Context Tannins are polyphenolic compounds found in legumes, trees and forage shrubs, such as Mimosa tenuiflora, and form hydrogen bonds with proteins. Aims The objective of the present study was to determine the optimal dietary concentration of natural tannins from M. tenuiflora for enhancing intake, digestibility, nitrogen (N) and tannin physiological balance, performance, carcass traits and commercial cuts of lambs. Methods Forty-eight uncastrated Santa Ines lambs were distributed between two experiments, each with four diets containing natural tannins (1.21 (control), 9.29, 17.4 and 25.4 g/kg dry matter (DM) total) from M. tenuiflora hay. Key results With increasing level of inclusion of natural tannins from M. tenuiflora hay in the diet, there were quadratic increases (P ≤ 0.05; up to 17.4 g/kg DM inclusion) in the daily nutrient intake, N faecal excretion, N urinary excretion, performance, carcass traits and rib and loin commercial cut weights of lambs. However, intake, faecal excretion, physiological balance of tannins and carcass leg circumference increased (P ≤ 0.05) linearly with an increasing inclusion of tannins from M. tenuiflora hay. Furthermore, there were linear decreases (P ≤ 0.05) in the digestibility of DM, crude protein, neutral detergent fibre corrected for ash and protein, acid detergent fibre, non-fibrous carbohydrate and total digestible nutrients and decreases in faecal excretion of total phenolic compounds and feeding efficiency in lambs with increasing dietary concentration of tannins. Conclusions It is recommended that M. tenuiflora hay replace Brachiaria decumbens hay at 250 g/kg of dietary roughage, corresponding to 17.4 g/kg DM of tannins, in the diet of Santa Ines finishing lambs because the resulting increased bioavailability of tannins improves nutrient intake, N retention, average daily gain, carcass weight and the weights of the most profitable cuts (leg, loin and rib). Implications The use of M. tenuiflora legume (which is common in the Caatinga biome) as hay roughage in the lamb diet increases tannin bioavailability and the efficiency of protein use, consequently improving performance and contributing to the economic viability of sheep production in the region.

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Turkmenler, Harun, Mahmut Ozacar, and I. Ayhan Sengil. "Biosorption of lead onto mimosa tannin resin: equilibrium and kinetic studies." International Journal of Environment and Pollution 34, no. 1/2/3/4 (2008): 57. http://dx.doi.org/10.1504/ijep.2008.020782.

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Şengil, İ. Ayhan, and Mahmut Özacar. "Biosorption of Cu(II) from aqueous solutions by mimosa tannin gel." Journal of Hazardous Materials 157, no. 2-3 (September 2008): 277–85. http://dx.doi.org/10.1016/j.jhazmat.2007.12.115.

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Ndazi, B., J. V. Tesha, S. Karlsson, and E. T. N. Bisanda. "Production of rice husks composites with Acacia mimosa tannin-based resin." Journal of Materials Science 41, no. 21 (November 2006): 6978–83. http://dx.doi.org/10.1007/s10853-006-0220-7.

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Proença, Carla Sofia, Bruno Serrano, Jorge Correia, and Maria Eduarda Machado Araújo. "Evaluation of Tannins as Potential Green Corrosion Inhibitors of Aluminium Alloy Used in Aeronautical Industry." Metals 12, no. 3 (March 16, 2022): 508. http://dx.doi.org/10.3390/met12030508.

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In this work some organic natural products were studied, namely tannic acid, gallic acid, mimosa tannin and chestnut tannin, as potential green corrosion inhibitors of the aluminium alloy AA2024-T3. The anodizing treatment was performed in a solution of the referred organic compounds in diluted sulfuric acid. The electrochemical impedance spectroscopy and the potentiodynamic polarization were performed to assess sealing quality and corrosion protection granted by the anodic films. To understand the green inhibitors; interaction with the metal surface, FTIR spectra of anodizing and anodizing and sealed samples of AA2023-T3 were recorded, and the shifts in the position of the major bands confirmed that the green inhibitor interacts with the metal surface. Images of the morphology of the coatings were provided by Scanning Electron Microscopy. From the results obtained through the various techniques that were used to carry out this study it is possible to conclude that the formed anodic films can be a good contribution for the prevention of corrosion in the aluminium alloy AA2024-T3.

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Moubarik, Amine, Hamid Reza Mansouri, Antonio Pizzi, Fatima Charrier, Ahmed Allal, and Bertrand Charrier. "Corn flour-mimosa tannin-based adhesives without formaldehyde for interior particleboard production." Wood Science and Technology 47, no. 4 (January 9, 2013): 675–83. http://dx.doi.org/10.1007/s00226-012-0525-4.

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Sauget, A., A. Nicollin, and A. Pizzi. "Fabrication and mechanical analysis of mimosa tannin and commercial flax fibers biocomposites." Journal of Adhesion Science and Technology 27, no. 20 (October 2013): 2204–18. http://dx.doi.org/10.1080/01694243.2013.767151.

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Martinez, S. "Inhibitory mechanism of mimosa tannin using molecular modeling and substitutional adsorption isotherms." Materials Chemistry and Physics 77, no. 1 (January 2003): 97–102. http://dx.doi.org/10.1016/s0254-0584(01)00569-7.

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Moubarik, Amine, Antonio Pizzi, Ahmed Allal, Fatima Charrier, Abdelouahed Khoukh, and Bertrand Charrier. "Cornstarch-mimosa tannin-urea formaldehyde resins as adhesives in the particleboard production." Starch - Stärke 62, no. 3-4 (April 2010): 131–38. http://dx.doi.org/10.1002/star.200900228.

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Cesprini, Emanuele, Primož Šket, Valerio Causin, Michela Zanetti, and Gianluca Tondi. "Development of Quebracho (Schinopsis balansae) Tannin-Based Thermoset Resins." Polymers 13, no. 24 (December 16, 2021): 4412. http://dx.doi.org/10.3390/polym13244412.

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One of the major challenges currently in the field of material science is finding natural alternatives to the high-performing plastics developed in the last century. Consumers trust synthetic products for their excellent properties, but they are becoming aware of their impact on the planet. One of the most attractive precursors for natural polymers is tannin extracts and in particular condensed tannins. Quebracho (Schinopsis balansae) extract is one of the few industrially available flavonoids and can be exploited as a building block for thermoset resins due to its phenol-like reactivity. The aim of this study was to systematically investigate different hardeners and evaluate the water resistance, thermal behavior, and chemical structure of the quebracho tannin-based polymers in order to understand their suitability as adhesives. It was observed that around 80% of the extract is resistant to leaching when 5% of formaldehyde or hexamine or 10% of glyoxal or furfural are added. Additionally, furfuryl alcohol guarantees high leaching resistance, but only at higher proportions (20%). The quebracho-based formulations showed specific thermal behavior during hardening and higher degradation resistance than the extract. Finally, these polymers undergo similar chemistry to those of mimosa, with exclusive reactivity of the A-ring of the flavonoid.

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Esposito, Leandro, Emiliano Manuel Ciannamea, Ignacio Solaberrieta, Juan Carlos Piter, Roxana Alejandra Ruseckaite, and Pablo Marcelo Stefani. "Tannin-modified soybean protein concentrate for wood adhesive." Journal of Applied Research in Technology & Engineering 3, no. 1 (January 31, 2022): 1–7. http://dx.doi.org/10.4995/jarte.2022.15962.

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Soybean protein concentrate (SPC) modified with condensed mimosa tannin (CT) were employed as eco-friendly and formaldehyde-free adhesives for glued-wood joints. Eucalyptus grandis wood boards free of knots and cracks were used as substrate. Thermogravimetric analysis (TGA) showed that tannin provided higher thermal stability to the adhesive, which allowed expanding the temperature range for hot pressing. Apparent viscosity and dynamic angle contact were measured to evaluate the influence of tannin content on rheological behaviour and the wettability process. A classic shear-thinning behaviour was observed for all adhesives. Apparent viscosity and equilibrium contact angle reached a maximum value for low CT content. This effect was attributed to the existence of associative interactions between CT and SPC. Bonding quality parameters (wood failure percentage and shear strength) of the glued-wood joints were measured according to EN 302-1:2004 standard. 1 % CT w/w on SPC adhesive showed the best performance for dry conditions. These adhesives were suitable for glued-wood joints for indoor environments.

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Chen, Xinyi, Xuedong Xi, Antonio Pizzi, Emmanuel Fredon, Xiaojian Zhou, Jinxing Li, Christine Gerardin, and Guanben Du. "Preparation and Characterization of Condensed Tannin Non-Isocyanate Polyurethane (NIPU) Rigid Foams by Ambient Temperature Blowing." Polymers 12, no. 4 (March 30, 2020): 750. http://dx.doi.org/10.3390/polym12040750.

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Ambient temperature self-blowing mimosa tannin-based non-isocyanate polyurethane (NIPU) rigid foam was produced, based on a formulation of tannin-based non-isocyanate polyurethane (NIPU) resin. A citric acid and glutaraldehyde mixture served as a blowing agent used to provide foaming energy and cross-link the tannin-derived products to synthesize the NIPU foams. Series of tannin-based NIPU foams containing a different amount of citric acid and glutaraldehyde were prepared. The reaction mechanism of tannin-based NIPU foams were investigated by Fourier Trasform InfraRed (FT-IR), Matrix Assisted Laser Desorption Ionization (MALDI-TOF) mass spectrometry, and 13C Nuclear Magnetic Resonance (13C NMR). The results indicated that urethane linkages were formed. The Tannin-based NIPU foams morphology including physical and mechanical properties were characterized by mechanical compression, by scanning electron microscopy (SEM), and thermogravimetric analysis (TGA). All the foams prepared showed a similar open-cell morphology. Nevertheless, the number of cell-wall pores decreased with increasing additions of glutaraldehyde, while bigger foam cells were obtained with increasing additions of citric acid. The compressive mechanical properties improved with the higher level of crosslinking at the higher amount of glutaraldehyde. Moreover, the TGA results showed that the tannin-based NIPU foams prepared had similar thermal stability, although one of them (T-Fs-7) presented the highest char production and residual matter, approaching 18.7% at 790 °C.

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Salawu, M. B., T. Acamovic, T. Hvelplund, and M. R. Weisbjerg. "Effects of tannins, formaldehyde and formic acid on total tract disappearance of DM, nitrogen and amino acids in grass silage." Proceedings of the British Society of Animal Science 1998 (1998): 153. http://dx.doi.org/10.1017/s0308229600033663.

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A major problem with grass is that during ensilage the proteins are degraded and nitrogen lost as non protein nitrogen. In the animal a disadvantage of grass silage is that the proteinaceous nitrogen is readily degraded in the rumen to ammonia. There is considerable evidence in the literature indicating that ruminal undegradable protein is a desirable component of some feeds (AFRC, 1993). This is valuable since proteins that by-pass the rumen may be digested in the intestine and the resultant amino acids absorbed. Tannins have been identified by other workers as suitable for the protection of protein in the rumen. However, there is some dubiety regarding the subsequent efficient release of protein in the intestine (McNabb et al., 1993). The effect of quebracho or mimosa tannins or formaldehyde or a combination of tannin/formate or formaldehyde/formate on silage total tract disappearance of dry matter (DM), nitrogen and total amino acids (TAA) was examined in this study.

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Salawu, M. B., T. Acamovic, T. Hvelplund, and M. R. Weisbjerg. "Effects of tannins, formaldehyde and formic acid on total tract disappearance of DM, nitrogen and amino acids in grass silage." Proceedings of the British Society of Animal Science 1998 (1998): 153. http://dx.doi.org/10.1017/s1752756200598056.

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A major problem with grass is that during ensilage the proteins are degraded and nitrogen lost as non protein nitrogen. In the animal a disadvantage of grass silage is that the proteinaceous nitrogen is readily degraded in the rumen to ammonia. There is considerable evidence in the literature indicating that ruminal undegradable protein is a desirable component of some feeds (AFRC, 1993). This is valuable since proteins that by-pass the rumen may be digested in the intestine and the resultant amino acids absorbed. Tannins have been identified by other workers as suitable for the protection of protein in the rumen. However, there is some dubiety regarding the subsequent efficient release of protein in the intestine (McNabb et al., 1993). The effect of quebracho or mimosa tannins or formaldehyde or a combination of tannin/formate or formaldehyde/formate on silage total tract disappearance of dry matter (DM), nitrogen and total amino acids (TAA) was examined in this study.

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Ghahri, Saman, Xinyi Chen, Antonio Pizzi, Reza Hajihassani, and Antonios N. Papadopoulos. "Natural Tannins as New Cross-Linking Materials for Soy-Based Adhesives." Polymers 13, no. 4 (February 16, 2021): 595. http://dx.doi.org/10.3390/polym13040595.

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Human health problems and formaldehyde emission from wood-based composites are some of the major drawbacks of the traditional synthetic adhesives such as urea formaldehyde resins. There have been many attempts to decrease formaldehyde emission and replace urea formaldehyde resins with bio-based adhesives for wood-based composites. Because of some weakness in soy-based adhesive, chemicals have been used as modifiers. Modified soy-based adhesives without any formaldehyde have been successfully used to prepare wood panels. To achieve this, different synthetic cross-linking chemicals such as phenol formaldehyde resins and polyamidoamine-epichlorohydrin were used. However, in reality, what we need are totally green adhesives that use natural materials. In our previous research work, the use of tannins in combination with soy-based adhesives to make wood composites was investigated. Thus, in this research work, the feasibility of using three types of natural tannins (quebracho, mimosa and chestnut tannins) as cross-linking materials for soy adhesive was studied. The chemical bond formation and adhesion behaviors of tannin-modified soy adhesives were also investigated by Matrix-Assisted Laser Desorption/Ionization Time-of-Flight Mass Spectrometry (MALDI-ToF-MS) and thermo-mechanical analysis (TMA). The results showed that at ambient temperature, both ionic and covalent bonds formed between tannin constituents and amino acids; however, at higher temperature, covalent bonds are largely predominate. Based on the results obtained from the thermo-mechanical analysis, the modulus of elasticity (MOE) of soy adhesive is increased by adding tannins to its formulation. In addition, the chemical bond formation was proved by MALDI-ToF-MS.

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Valenti, Bernardo, Luca Campidonico, Antonio Natalello, Massimiliano Lanza, Saheed A. Salami, Alessandro Priolo, Andrea Serra, Mariano Pauselli, and Giuseppe Luciano. "Fatty acid metabolism in lambs supplemented with different condensed and hydrolysable tannin extracts." PLOS ONE 16, no. 10 (October 6, 2021): e0258265. http://dx.doi.org/10.1371/journal.pone.0258265.

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Five groups of lambs (n = 9 each) were used to test the effect of plant extracts rich in hydrolysable (HT) or condensed tannin (CT) on animal performance, fatty acid composition of rumen content, liver and meat. The control group (CO) received a concentrate-based diet without tannins supplementation. The other groups received the same diet as the control lambs plus 4% chestnut (CH) and tara (TA) extracts as a source of HT and mimosa (MI) and gambier (GA) extracts as a source of CT. One-way ANOVA was used to assess the overall effect of dietary treatments, tannins supplementation (CO vs. CH+TA+MI+GA) and the effect of tannin type (HT vs. CT: CH+TA vs. MI+GA) on animal performance, rumen content, liver and intramuscular FA. Dietary CH negatively affected animal performance. The rumen content of the different groups showed similar levels of 18:3 c9c12c15, 18:2 c9c12, 18:2 c9t11, 18:1 t11 and 18:0, whereas 18:1 t10 was greater in CO. Also, 18:1 t10 tended to be lower in the rumen of HT than CT-fed lambs. These data were partially confirmed in liver and meat, where CO showed a greater percentage of individual trans 18:1 fatty acids in comparison with tannins-fed groups. Our findings challenge some accepted generalizations on the use of tannins in ruminant diets as they were ineffective to favour the accumulation of dietary PUFA or healthy fatty acids of biohydrogenation origin in the rumen content and lamb meat, but suggest a generalized influence on BH rather than on specific steps.

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Peña, C., M. Larrañaga, N. Gabilondo, A. Tejado, J. M. Echeverria, and I. Mondragon. "Synthesis and characterization of phenolic novolacs modified by chestnut and mimosa tannin extracts." Journal of Applied Polymer Science 100, no. 6 (2006): 4412–19. http://dx.doi.org/10.1002/app.22923.

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Özacar, Mahmut, Cengiz Soykan, and İ. Ayhan Şeng??l. "Studies on synthesis, characterization, and metal adsorption of mimosa and valonia tannin resins." Journal of Applied Polymer Science 102, no. 1 (2006): 786–97. http://dx.doi.org/10.1002/app.23944.

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Ambikabothy, Jamunaa, Halijah Ibrahim, Stephen Ambu, Srikumar Chakravarthi, Khalijah Awang, and Jaya Vejayan. "Efficacy evaluations of Mimosa pudica tannin isolate (MPT) for its anti-ophidian properties." Journal of Ethnopharmacology 137, no. 1 (September 2011): 257–62. http://dx.doi.org/10.1016/j.jep.2011.05.013.

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Oktay, Salise, Nilgün Kızılcan, and Başak Bengü. "Development of bio-based cornstarch - Mimosa tannin - sugar adhesive for interior particleboard production." Industrial Crops and Products 170 (October 2021): 113689. http://dx.doi.org/10.1016/j.indcrop.2021.113689.

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Moubarik, Amine, Antonio Pizzi, Fatima Charrier, Ahmed Allal, MiguelAngel Badia, Hamid Reza Mansouri, and Bertrand Charrier. "Mechanical characterization of industrial particleboard panels glued with cornstarch–mimosa tannin–urea formaldehyde resins." Journal of Adhesion Science and Technology 27, no. 4 (February 2013): 423–29. http://dx.doi.org/10.1080/01694243.2012.711739.

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Moubarik, Amine, Nicolas Causse, Thomas Poumadere, Ahmed Allal, Antonio Pizzi, Fatima Charrier, and Bertrand Charrier. "Shear Refinement of Formaldehyde-Free Corn Starch and Mimosa Tannin (Acacia mearnsii) Wood Adhesives." Journal of Adhesion Science and Technology 25, no. 14 (January 2011): 1701–13. http://dx.doi.org/10.1163/016942411x576176.

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Missio, André L., Bruna Tischer, Patricia S. B. dos Santos, Cristiane Codevilla, Cristiano R. de Menezes, Juliano S. Barin, Clovis R. Haselein, et al. "Analytical characterization of purified mimosa ( Acacia mearnsii ) industrial tannin extract: Single and sequential fractionation." Separation and Purification Technology 186 (October 2017): 218–25. http://dx.doi.org/10.1016/j.seppur.2017.06.010.

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Conde, Mireia, Felip Combalia, Grau Baquero, Lluis Ollé, and Anna Bacardit. "Exploring the feasibility of substituting mimosa tannin for pine bark powder. A LCA perspective." Cleaner Engineering and Technology 7 (April 2022): 100425. http://dx.doi.org/10.1016/j.clet.2022.100425.

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Kusmaryanti, Tika, Ratna Ibrahim, and Putut Har Riyadi. "PENGARUH PERBEDAAN BAHAN PENYAMAK TERHADAP KUALITAS KULIT IKAN PARI MONDOL (Himantura gerrardi) TERSAMAK The Effect of Different Tanning Materials towards Leather Quality of Tanned Mondol Stingray (Himantura gerrardi)." SAINTEK PERIKANAN : Indonesian Journal of Fisheries Science and Technology 11, no. 2 (February 25, 2016): 140. http://dx.doi.org/10.14710/ijfst.11.2.140-147.

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ABSTRAK Usaha penyamakan kulit ikan Pari umumnya dilakukan oleh usaha kecil menengah dan hanya menggunakan metode aldehid dengan bahan samak formalin, Selain itu juga belum diketahui kualitas kulit ikan Pari Mondol tersamak yang menggunakan bahan samak krom. Penelitian ini bertujuan untuk mengetahui pengaruh perbedaan penggunaan jenis bahan penyamak terhadap kualitas fisik dan kimiawi kulit ikan Pari Mondol tersamak. Materi penelitian berupa kulit ikan Pari Mondol (Himantura gerrardi) dan bahan samak. Penelitian dilakukan dengan metode eksperimental laboratoris. Rancangan percobaan yang digunakan adalah Rancangan Acak Kelompok dengan perlakuan bahan samak yang berbeda, yaitu formalin, krom, dan kombinasi. Masing-masing perlakuan diulang tiga kali. Variabel mutu yang diamati adalah kekuatan tarik, kemuluran, kekuatan sobek, ketebalan, suhu kerut, ketahanan bengkuk (bengkok), pH dan kadar air. Data dianalisis menggunakan ANOVA dan perbedaan diantara perlakuan diuji dengan Uji Tukey. Hasil penelitian menunjukkan bahwa perbedaan bahan penyamak menyebabkan pengaruh nyata terhadap nilai kekuatan tarik, kekuatan sobek dan ketebalan tetapi tidak memberikan pengaruh nyata terhadap nilai pH, kadar air dan ketahanan bengkuk. Produk yang terbaik yaitu kulit ikan Pari Mondol yang disamak dengan bahan samak kombinasi antara krom dan mimosa, yang sebagian persyaratan mutunya sudah memenuhi persyaratan mutu kulit ikan Pari tersamak menurut SNI 06-6121-1999. Kata kunci: Kualitas, kulit Ikan Pari, penyamak ABSTRACT Meanwhile the quality of Stingray tanned leather which using chrome tannin materials was not yet known. This research aims to determine the effect of different types used tannin materials towards physical and chemical quality of Stingray leather quality. The materials used in this research isStingray (Himantura gerrardi) skin and tannin materials. The study was conducted with laboratory experimental method. The experiments was designed according to the Randomized Block Design with different tanning materials (formalin, chrome, and chrome-combination). Each treatment was done with in triplicate. The quality variables that measured were tensile strength, elongation, tear strength, thickness, shrinkage temperature, bent resistance, pH and moisture content. Data were analyzed using Analysis of Variance. To find the difference between treatments, the data were tested with Honestly Significant Difference Test . The results showed that various of tannin materials gave significant effects to the values of tensile strength, tear strength and thickness however there was not any significant effect on bent resistance, moisture content and pH value. The best product were Stingray tanned leather with chrome-combination tannin material, which partially quality requirements has been comply with Stingray tanned leather quality requirements according to SNI. Keywords: Quality, stingray skin, tanning

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Pereira, Tatiana Pires, Elisa Cristina Modesto, Delci de Deus Nepomuceno, Osniel Faria de Oliveira, Rafaela Scalise Xavier de Freitas, James Pierre Muir, José Carlos Batista Dubeux Junior, and João Carlos de Carvalho Almeida. "Characterization and biological activity of condensed tannins from tropical forage legumes." Pesquisa Agropecuária Brasileira 53, no. 9 (September 2018): 1070–77. http://dx.doi.org/10.1590/s0100-204x2018000900011.

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Abstract: The objective of this work was to characterize condensed tannins (CT) from six tropical forage legumes and to determine their biological activity. The monomers propelargonidin, prodelphinidin and procyanidin were analyzed, as well as extractable condensed tannin (ECT), protein-bound CT (PBCT) and fiber-bound CT (FBCT), molecular weight, degree of polymerization, polydispersity index, and biological activity by protein precipitate by phenols (PPP) of leaves of the legumes Cajanus cajan, Gliricidia sepium, Stylosanthes capitata x Stylosanthes macrocephala (stylo), Flemingia macrophylla, Cratylia argentea, and Mimosa caesalpiniifolia, and of the bark of this latter species. Differences were observed in the concentrations of ECT, PBCT, PPP, and total condensed tannin among species, but not in that of FBCT. The highest value of PBCT occurred in F. macrophylla. Total CT varied from nondetected concentration in C. argentea to the highest concentration in M. caesalpiniifolia leaves that contain the greatest levels of PPP. No differences were observed for polymerization degree in stylo, F. macrophylla, and M. caesalpiniifolia. Leaves of stylo, C. cajan, and G. sepium, all containing between 20 and 50 g kg-1 total CT, should be beneficial CT sources, if offered as sole feeds in ruminant diets. The ratio of prodelphinidin:procyanidin varies from 10:80 (stylo) to 65:35 (F. machrophylla), and propelargonidin is only determined in C. argentea.

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Biondi, Randazzo, Russo, Pino, Natalello, Hoorde, and Caggia. "Dietary Supplementation of Tannin-Extracts to Lambs: Effects on Meat Fatty Acids Composition and Stability and on Microbial Characteristics." Foods 8, no. 10 (October 10, 2019): 469. http://dx.doi.org/10.3390/foods8100469.

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Two extracts derived from plant material rich in hydrolysable (Tara, T; Caesalpinia spinosa) or condensed (Mimosa, M; Acacia mearnsii) tannins were added to lamb’s diet and their effects on meat quality and on microbial population were evaluated; a diet without tannins represented the Control (C). Meat pH, vitamin E, intramuscular fat content and muscle fatty acid composition were determined. Oxidative stability and microbiological analyses were performed on meat samples after 0, 4 and 7 days of refrigerated storage. Psychrotrophic bacteria were identified through MALDI-TOF MS analysis. Regarding meat fatty acids, Tara treatment decreased the percentage of monounsaturated fatty acids. The counts of all microbial groups were similar among dietary treatments at day 0, while a significant reduction of microbial loads was observed in T-group at day 7. Pseudomonas fluorescens group count was significantly affected by T extract supplementation. The MALDI-TOF MS identification revealed the dominance of Pseudomonas fragi species in all samples while Pseudomonas lundensis, Brochothrix thermosphacta and Candida famata were revealed only in control ones. In conclusions, the tannin extract supplementation is a promising dietary strategy to preserve lamb meat quality.

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Luzardo, Francisco H. M., Fermin G. Velasco, Ivea K. S. Correia, Patrícia M. S. Silva, and Luiz C. Salay. "Removal of lead ions from water using a resin of mimosa tannin and carbon nanotubes." Environmental Technology & Innovation 7 (April 2017): 219–28. http://dx.doi.org/10.1016/j.eti.2017.03.002.

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Oliveira, Lorena Mayana Beserra de, Claudia Maria Leal Bevilaqua, Iara Tersia Freitas Macedo, Selene Maia de Morais, Maria Vivina Barros Monteiro, Claudio Cabral Campello, Wesley Lyeverton Correia Ribeiro, and Emanuelle Karine Frota Batista. "Effect of six tropical tanniferous plant extracts on larval exsheathment of Haemonchus contortus." Revista Brasileira de Parasitologia Veterinária 20, no. 2 (June 2011): 155–60. http://dx.doi.org/10.1590/s1984-29612011000200011.

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Tanniferous plants represent a promising alternative for controlling gastrointestinal nematodes of small ruminants. This experiment evaluated the effects of extracts from the leaf and stem of Anadenanthera colubrina, Leucaena leucocephala and Mimosa tenuiflora on larval exsheathment of Haemonchus contortus in vitro and verified the role of tannins in this process. Third-stage larvae of H. contortus were incubated with extracts for 3 hours and were exposed to sodium hypochlorite solution. The extracts were tested at 300 µg.mL-1 and accompanied by controls: phosphate buffer solution (PBS) and polyvinyl polypyrrolidone (PVPP). The larval exsheathment was evaluated for 60 minutes, and the results were subjected to the Kruskal-Wallis test (p < 0.05). The six extracts blocked larval exsheathment. After PVPP addition, a tannin inhibitor, the exsheathment percentage was similar to the PBS (p > 0.05), except for L. leucocephala and M. tenuiflora leaf extracts. However, pre-incubation with PVPP of these two extracts significantly changed larval exsheathment when compared to the non-treated extracts (p < 0.05). These results suggest that A. colubrina, L. leucocephala and M. tenuiflora could be useful in gastrointestinal nematode control and that tannins are probably the main compounds involved in the observed effects. However, in vivo and toxicological studies should be conducted.

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Deaville, E. R., D. I. Givens, and I. Mueller-Harvey. "Chestnut and mimosa tannin silages: Effects in sheep differ for apparent digestibility, nitrogen utilisation and losses." Animal Feed Science and Technology 157, no. 3-4 (May 2010): 129–38. http://dx.doi.org/10.1016/j.anifeedsci.2010.02.007.

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