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Journal articles on the topic 'Tanin de mimosa'

Author: Grafiati

Published: 17 June 2022

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1

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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2

Jannah, Nabila Tsarwatul, Tri Winarni Agustini, and Apri Dwi Anggo. "Penerapan Ekstrak Putri Malu (Mimosa pudica L.) sebagai Penghambat Melanosis pada Udang selama Penyimpanan Dingin." Jurnal Pascapanen dan Bioteknologi Kelautan dan Perikanan 13, no. 2 (December 30, 2018): 131. http://dx.doi.org/10.15578/jpbkp.v13i2.485.

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Salah satu masalah pada mutu udang selama penanganan adalah munculnya melanosis. Melanosis merupakan bercak hitam yang timbul akibat aktivitas enzim PPO (polifenoloksidase). Tanaman putri malu (Mimosa pudica L.) memiliki senyawa bioaktif yang dapat berfungsi sebagai antioksidan seperti flavonoid, fenol dan tanin. Penelitian ini bertujuan untuk mengetahui efektivitas dan konsentrasi terbaik ekstrak tanaman putri malu (Mimosa pudica L.) dalam proses enzimatis (melanosis) pada udang selama penyimpanan dingin. Konsentrasi yang digunakan adalah 0%, 3%, 5% dan 7% dengan penyimpanan selama 10 hari dan pengujian dilakukan setiap 2 hari (hari ke 0, 2, 4, 6, 8 dan 10). Paramater pengujian yang diamati adalah uji melanosis secara visual, TBA, TVBN, sensori dan pH. Rancangan percobaan yang digunakan adalah RAL. Hasil penelitian menunjukkan ekstrak tanaman putri malu memberikan pengaruh nyata dalam mempertahankan mutu udang dari terjadinya reaksi melanosis hingga hari ke-6. Konsentrasi terbaik adalah konsentrasi 7% yang dapat mempertahankan mutu udang hingga hari ke-6 karena konsentrasi 7% memiliki nilai hasil uji melanosis, TBA, TVBN, dan pH yang terendah serta nilai sensori tertinggi.

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3

Kasmudjiastuti, Emiliana, Sri Sutyasmi, and Titik Purwati Widowati. "Pemanfaatan tanin dari kulit kayu tingi (Ceriops tagal) sebagai bahan penyamak nabati: pengaruh penambahan alum dan mimosa." Majalah Kulit, Karet, dan Plastik 31, no. 1 (June 26, 2015): 45. http://dx.doi.org/10.20543/mkkp.v31i1.175.

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4

Karunita Ika Astuti, Fitriyanti, and Nur Huda. "UJI AKTIVITAS ANTIDIARE EKSTRAK ETANOL 96% HERBA PUTRI MALU (Mimosa pudica L.) TERHADAP MENCIT JANTAN YANG DIINDUKSI Oleum ricini." Borneo Journal of Pharmascientech 4, no. 1 (April 1, 2020): 42–50. http://dx.doi.org/10.51817/bjp.v4i1.276.

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Herba Putri Malu (Mimosa pudica L.) merupakan salah satu tumbuhan yang digunakan di masyarakat sebagai antidiare.Tujuan penelitian ini adalah untuk mengetahui kandungan senyawa dan aktivitas antidiare ekstrak etanol 96% Herba Putri Malu yang dibuat dengan metode maserasi. Hewan uji dibagi menjadi 5 kelompok yang masing-masing terdiri dari 5 ekor mencit, dimana kelompok negatif diberikan Na-CMC 0,5%, kelompok positif berupa Loperamide HCL 0,0052 mg/20gBB mencit dan ekstrak etanol Herba Putri Malu dengan dosis terbagi (100, 200, dan 400 mg/kgBB). Setelah 30 menit pemberian ekstrak hewan uji diberikan induksi Oleum ricinip.o. Pengamatan dilakukan selama 4 jam dengan mengamati frekuensi diare dan bobot feses. Pada skrining fitokimia mengandung senyawa alkaloid, flavonoid, tanin, saponin, dan steroid. Data dianalisis menggunakan analisis Man Whitney menunjukkan bahwa ekstrak etanol Herba Putri Malu dengan dosis 400 mg/kgBB merupakan dosis yang efektif sebagai antidiare yang dapat menurunkan frekuensi diare (P>0,585), dan menurunkan bobot feses (P>0,754).

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5

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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<p>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). <em>Mimosa pudica</em> 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 <em>Mimosa pudica</em> 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 <em>Mimosa pudica </em>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 <em>Mimosa pudica</em> tannin gel showed that the remaining Cr heavy metal was 0.7098 ppm. It was already below the threshold which was 1 ppm.</p><p> </p><p><strong>Keywords:</strong> biosorption, condensation polymerization, extraction, <em>Mimosa pudica</em>, tannin gel</p>

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6

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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7

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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8

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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9

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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10

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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11

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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12

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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13

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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14

Guimarães-Beelen, P. M., T. T. Berchielli, R. Buddington, and R. Beelen. "Efeito dos taninos condensados de forrageiras nativas do semi-árido nordestino sobre o crescimento e atividade celulolítica de Ruminococcus flavefaciens FD1." Arquivo Brasileiro de Medicina Veterinária e Zootecnia 58, no. 5 (October 2006): 910–17. http://dx.doi.org/10.1590/s0102-09352006000500029.

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Avaliaram-se o crescimento da população, a atividade in vitro da enzima 1,4-<FONT FACE=Symbol>b-</FONT>endoglucanase e a taxa de digestão de celulose em culturas de Ruminococcus flavefaciens FD1 na presença de 50, 100, 200 e 400µg/ml de taninos purificado das leguminosas Mimosa hostilis (Jurema Preta), Mimosa caesalpinifolia (Sabiá) e Bauhinia cheilantha (Mororó). O crescimento bacteriano, a atividade da endoglucanase e a digestão de celulose foram fortemente inibidos pela presença dos taninos condensados purificados das três espécies, entretanto, a intensidade da inibição foi variável em função da espécie da leguminosa e da concentração de tanino.

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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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16

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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17

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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18

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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19

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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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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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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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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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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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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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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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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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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34

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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35

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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36

Pereira Filho, José Morais, Ednéia de Lucena Vieira, Aderbal Marcos de Azevedo Silva, Marcílio Fontes Cezar, and Francisco Uchoa Amorim. "Efeito do tratamento com hidróxido de sódio sobre a fração fibrosa, digestibilidade e tanino do feno de jurema-preta (Mimosa tenuiflora. Wild)." Revista Brasileira de Zootecnia 32, no. 1 (February 2003): 70–76. http://dx.doi.org/10.1590/s1516-35982003000100009.

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O experimento foi conduzido com o objetivo de avaliar o efeito do tratamento com hidróxido de sódio (NaOH) na fração fibrosa, no teor de tanino e na digestibilidade in vitro da matéria seca do feno de jurema-preta. As folhas foram colhidas manualmente e desidratadas à sombra. O tratamento químico consistiu na pulverização do feno com solução de 0; 2; 4; 6 e 8% de NaOH, na proporção de 1 litro da solução para 1 kg de feno. Amostras do feno foram submetidas à determinação da matéria seca (MS), proteína bruta (PB), fibra em detergente neutro (FDN), fibra em detergente ácido (FDA), tanino e digestibilidade in vitro da matéria seca (DIVMS), que se constituíram nas variáveis analisadas. O delineamento foi o inteiramente casualizado, com cinco tratamentos e quatro repetições. O tratamento com NaOH proporcionou efeito linear decrescente nos teores de MS, hemicelulose e tanino, enquanto, para FDN e FDA, ocorreu efeito quadrático. A PB não foi afetada e a DIVMS melhorou com o aumento da concentração de NaOH. A estimativa da DIVMS pelo teor de tanino, apesar de significativa, carece de mais estudos.

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37

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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38

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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39

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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40

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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41

Paes, Juarez Benigno, Itaragil Venâncio Marinho, Renivaldo Araújo de Lima, Carlos Roberto de Lima, and Tatiane Kelly Barbosa de Azevedo. "Viabilidade técnica dos taninos de quatro espécies florestais de ocorrência no semi-árido brasileiro no curtimento de peles." Ciência Florestal 16, no. 4 (December 30, 2006): 453. http://dx.doi.org/10.5902/198050981927.

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Os taninos vegetais são encontrados em várias espécies florestais. Atualmente, os curtidores da Região Nordeste têm no angico-vermelho (Anadenanthera colubrina var. cebil), sua única fonte de taninos. Este estudo teve como objetivos avaliar o potencial tanífero e a capacidade curtente dos taninos, por meios das características físico-mecânicas das peles curtidas, de quatro espécies florestais de ocorrência no Semi-Árido brasileiro, visando a possibilitar a diversificação de espécies a serem utilizadas nos curtumes da região. Os taninos foram obtidos de angico (Anadenanthera colubrina var. cebil), cajueiro (Anacardium occidentale), jurema-preta (Mimosa tenuiflora) e de jurema-vermelha (Mimosa arenosa). Peles de caprinos foram curtidas com os taninos extraídos dessas espécies e comparadas a peles curtidas com tanino comercial de acácia negra ("Seta Natur"). Amostras de peles curtidas foram submetidas a testes de resistência à tração, ao alongamento e ao rasgamento progressivo. Verificaram-se bons resultados das peles curtidas com os taninos obtidos de jurema-preta e jurema-vermelha. Pela abundância no Semi-Árido brasileiro, a jurema-preta e a jurema-vermelha apresentam potencial de exploração para obtenção de taninos, havendo a necessidade pesquisas que indiquem as melhores formas de aplicação dos taninos obtidos.

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42

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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43

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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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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45

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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46

Udkhiyati, Mustafidah, and Laili Rachmawati. "Comparison the Effect of Using Different Fatliqour to the Formation of Chromium (VI) in Leather Production." Materials Science Forum 948 (March 2019): 217–20. http://dx.doi.org/10.4028/www.scientific.net/msf.948.217.

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Restrictions and control on the use of fatliquor especially the sulphited oil during leather production is required due to its effect on chromium change valence (from Cr(III) to Cr(VI)). Utilization of the other oil sources such as vegetable or mineral oil is worthed to be a substitute material. The aim of this study is to quantify the potential release of Cr(III) and Cr(VI) from different fatliquors and find the alternative fatliquor. The results showed that the use of 10% mineral oil and sulphited oil affected the Cr total and formation Cr(VI) in the leather, while using 6% condensed tannin (Mimosa) as an antioxidant is effective to reduce the Cr total and Cr(VI) contents in the leather.

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47

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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48

Selmi, Taher, Angela Sanchez-Sanchez, Philippe Gadonneix, Jacek Jagiello, Mongi Seffen, Habib Sammouda, Alain Celzard, and Vanessa Fierro. "Tetracycline removal with activated carbons produced by hydrothermal carbonisation of Agave americana fibres and mimosa tannin." Industrial Crops and Products 115 (May 2018): 146–57. http://dx.doi.org/10.1016/j.indcrop.2018.02.005.

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Herbst, Marcelo H., and Ney V. Vugman. "EPR Spectroscopy Investigation of Cu2+Ions Adsorbed in Tannin-Formaldehyde Resins of Mimosa (Acacia mearnsii) Bark Extracts." Journal of Spectroscopy 2015 (2015): 1–5. http://dx.doi.org/10.1155/2015/978270.

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The chemical environment of Cu2+ions adsorbed in tannin-formaldehyde resins ofAcacia mearnsiibark extracts, prepared from polybutene, is investigated by EPR spectroscopy at 300 K. The spectrum is simulated considering two isolated axial Cu(II) species (Species 1:A∥=16.50(5) mT,A⊥=1.20(10) mT,g∥=2.28(1), andg⊥=2.08(1); Species 2:A∥=15.00(5) mT,A⊥=1.50(10) mT,g∥=2.32(1), andg⊥=2.05(2)), superposed to a broad line (giso=2.14(1); linewidth = 30.0(5) mT) assigned to Cu(II) aggregates. Measurements at 77 K did not improve spectral resolution. Heating at 413 K changes the hyperfine parameters of Species 2 (A∥=14.20(5) mT,A⊥=1.20(10) mT,g∥=2.33(1), andg⊥=2.07(2)) and slightly modifies the parameters of the broad line (giso=2.11(2); linewidth = 40.00(50) mT) but does not change Species 1, assigned to Cu(II) species immobilized into resin pores in cathecolate-type coordination sites. Species 2 is assigned to Cu(II) species immobilized at the outer resin surface. Upon extended heating, a reversible formation of semiquinone-type paramagnetic radicals (giso=2.0037(1)) is observed, assigned to the partial collapse of the resin polymeric network.

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Nicolas, V., Z. Marie, A. Mija, A. Celzard, and V. Fierro. "Estimation of the reaction kinetic parameters of a mimosa tannin-based thermoset resin with a simulation approach." Industrial Crops and Products 161 (March 2021): 113228. http://dx.doi.org/10.1016/j.indcrop.2020.113228.

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