• Journal of the Korean Applied Science and Technology
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• v.9 no.2
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• pp.175-179
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• 1992

In order to investigate the effect of tannic acid and ${\alpha}$-tocopherol on methyl linoleate autoxidation and on inhibition activity of lipoxygenase in phospholipid, the rate of formation of methyl linoleate hydroperoxide was measured by HPLC. The reaction mixture contained methyl linoleate 70mM, radical initiator AMVN 0.7mM, tannic acid and ${\alpha}$-tocopherol 0.7mM, each, in a mixture of hexane/isopropanol(1 : 1, v/v). Under this reaction condition, tannic acid was good enough antioxidant. The tannic acid and ${\alpha}$-tocopherol for the inhibition activivity of lipoxygenase were measured at the reaction conditions: phospholipid $1{\mu}M$. tannic acid and ${\alpha}$-tocopherol were reacted as an inhibitor of lipoxygenase in phospholipid, especialy in phosphatidy lcholine.

• Fashion & Textile Research Journal
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• v.5 no.4
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• pp.389-394
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• 2003

Dyeing properties of silk fabric with leaf Mustard was investigated the relation with pH variation, mordants, mordant method. K/S value shows the following sequence: pH 3>pH 5>pH 7>pH 9. K/S value shows high in post mordant conditions. Silk fabric shows the green, blue tone according to mordants(Al, Cu, Fe mordants). The tannic acid treatment silk fabric shows higher than the nontannic acid treatment silk fabric in K/S value. Lighting fastness of tannic acid treatment silk fabric shows better than that of nontannic acid treatment in Cu, Fe mordants. Water fastness of tannic acid treatment silk fabric was wholly improved. Tannic acid treatment improved dyeing properties of silk fabric with leaf Mustard.

• Korean journal of applied entomology
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• v.48 no.4
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• pp.519-526
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• 2009

Bacillus thuringiensis subsp. kurstaki KB100 isolated from the domestic soil have the most effective activity against the beet armyworm, Spodoptera exigua larva. The tannic acid as protease inhibitor might be increased the efficacy of sublethal concentrations of B. thuringiensis. The tannic acid was identified as a protease inhibitor that could increased the efficacy of sublethal concentrations of B. thuringiensis. Mixture of B. thuringiensis and tannic acid was investigated the mortality of S. exigua larva in the laboratory and field. When B. thuringiensis treated to 2nd larva of S. exigua, mortality was shown 54.4%. However, mixtures of B. thuringiensis with 4 and 40 mM tannic acid were increased mortalities to 2nd larva of S. exigua as 64.0 and 95.5%, respectively. Also, synergy effect of mixture of B. thuringiensis and 40 mM tannic acid was increased the mortality of S. exigua 3rd larva to 93.3%, even though 60.0% mortality with only B. thuringiensis treatment. On the other hand, the mortality of mixture with B. thuringiensis and 80 mM tannic acid was 53.3% lower than B. thuringiensis single treatment. In the welsh onion field, the accumulated mortalities of 3 times replicated with mixture of B. thuringiensis and 40 mM tannic acid were 83.9, 89.4 and 66.8% compare with 61.8, 80.4 and 47.3% as only B. thuringiensis treatment, respectively.

• Textile Coloration and Finishing
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• v.6 no.2
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• pp.1-9
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• 1994

In order to study the effect of mordanting on silk fabrics treated with tannin, those fabrics were treated with Al, Cu, Cr, Fe, Sn by pre and post mordanting. It was studied about color change, weighting effect, dgree of photodegradation by pre and post mordanting. The results are as fallows ; 1. On the addition of mordants into mimosa and tannic acid solution, &{\lambda}_{max}& of the former was slightly blue-shifted, on the other hand, &{\lambda}_{max}& of the latter was obviously Red-shifted. 2. In case of Cu, Cr, Pre mordanting, weighting effect were appeared. Weighting effect of silk fabrics treated with Tannic acid increased higher than mimosa by mordanting. 3. In color change, Silk fabrics treated with Mimosa and Tannic acid generally changed to red direction and fabrics treated with tannic acid changed to yellow direction by pre and post mordanting. 4. In the photodegradation, the degree of photodegradation on mordanted fabrics increased. Its degree was slack in Cu, Cr, Post mordanting. On the other hand, Al, Fe, Sn were greate. Silk fabrics treated with Mimosa and Tannic acid got inhibiting effect on photodegradation.

• Textile Coloration and Finishing
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• v.7 no.3
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• pp.60-67
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• 1995

This study was made to investigate the effect of silk fabrics treated with mimosa and tannic acid-weighting effect, surface color according to temprature, treatment time, concentration, pH. The results were as follows ; 1. The wavelength of maximum absorption of mimosa and tannic acid solution appeared at 278.5nm and 275.0nm, respectively. By the irradiation, spectra at wavelength of maximum absorption of mimosa solution disappeared, but those of tannic acid solution decreased after 48hr irradiation. 2. The tannin weighting increased with the increase of concentration, treatment temperature at 8$0^{\circ}C$, acidic condition. In case of tannic acid, it was higher than mimosa. 3. Surface color of silk fabric with mimosa changed from 2.8YR to 5.8YR acc-ording to the increase o( tannin concentration but in case of tannic acid itchanged from 4.2Y to 3.9Y. It was more changed acidic or alkaline conditionthan origine solution.

• Proceedings of the Korean Society of Applied Pharmacology
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• 1995.04a
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• pp.99-99
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• 1995

In vivo 실험결과, FVA가 감염된 BALB/c mice 에게 AZT를 18일간 경구투여시 (100mg/kg/day) 대조군에 비해 비장의 비대를 82% 억제하였으며, 이들에게 FVA를 재감염시킨 후 18일 뒤에도 비장의 비대가 63% 억제되었다. 그러나 혈액중 빈혈의 지표는 정상으로 회복하지 못하였다. 한편, tannic acid 는 (500mg/kg/day) 비장 비대를 55% 억제하였으며, 빈혈지표도 정상으로 회복되었다. 그러나, FVA를 재감염시킨 경우에는 비장의 비대가 억제되지 않았다. 반면에, tannic acid 와 AZT 를 병용투여시 비장의 비대를 98% 억제하여 상승효과를 초래하였으며, 빈혈지표도 정상으로 회복되어 독성을 감소시켰다. 또한 이들에게 FVA를 재감염시킨 경우에도 비장의 비대가 63% 억제되었다. 한편, In vitro 실험결과 AZT 의 경우 $IC_{50}$/이 0,01$\mu$M인 반면에 tannic acid의 경우에는 5 $\mu$M로서 약 1/500 의 효력을 나타내었다. 이상의 결과는 tannic acid 는 AZT 와는 다른 기전에 의해 FVA 의 감염에 의한 비장비대 및 빈혈을 억제하는 것으로 고려된다.

• Fashion & Textile Research Journal
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• v.12 no.4
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• pp.523-530
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• 2010

The purpose of this research was to raise K/S value by mercerization and tannic acid treatment in cotton fabrics. K/S value was 2.84-3.56 in mercerized none-mordant fabrics and it is 5.12-5.36 in tannic acid treatment. As the result, it showed higher in processed cotton fabrics than in unprocessed ones. Processed cotton fabrics had high K/S value in pH 3, pre-mordant. Antibacterial activity showed 99.9% in tannic acid and Cu mordanted fabrics. Deodorization and UV-cut effect were showed a higher effect in dyed fabrics than in undyed ones.

• Food Science and Biotechnology
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• v.17 no.2
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• pp.362-366
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• 2008

Anti-lipogenic effects of tannic acid on 3T3-L1 adipocytes as well as on rats fed high fat diet (HFD) were investigated. Tannic acid stimulated lipolysis through suppression of the leptin secretion and an increase of glycerol release in a dose dependent manner in 3T3-L1 adipocytes. For animal study, the rats were fed either HFD or HFD supplemented with 1%(w/w) tannic acid (HFDT) for 12 weeks, respectively. Body weight gain, liver weight, and visceral fat mass in rats fed HFDT were significantly decreased compared to those of rats fed HFD. The lipid profiles of HFDT group were significantly decreased compared with HFD group in the serum and liver, whereas fecal total cholesterol excretion was increased in HFDT group. These results suggest that anti-lipogenic effect of tannic acid in 3T3-L1 adipocytes and in rats fed HFD may be due to the stimulation of lipolysis and the reduction of lipid levels.

• Journal of Adhesion and Interface
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• v.20 no.2
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• pp.71-75
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• 2019

Tannic acid is one of the most commonly found polyphenols in the vegetable field. Initially, research on tannins concentrated on physiological functions such as antioxidants. Recently, however, tannic acid has attracted much interest as a molecular glue as it has been found to interact virtually all bio-macromolecules such as proteins and DNA. The various properties of tannic acid are expected to control the wettability of the surface, contribute to energy storage and generation, and show potential as a medical agent. Here, tannic acid will be discussed about the interaction of with bio-macromolecules as a molecular glue, surface modification, and utilization of itself as biomaterials.

• Food Science and Biotechnology
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• v.17 no.6
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• pp.1322-1326
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• 2008

Tannase catalyzes the hydrolysis of gallic acid esters and hydrolysable tannins. Twenty-two Lactobacillus strains with tannase activity were isolated from 7 types of kimchi. A polymerase chain reaction-based assay targeting the recA gene assigned all isolates to either Lactobacillus plantarum or Lactobacillus pentosus. The tannase activities of isolates measured in whole cells and cell-free extracts varied even within each species. The activities of the isolates varied with the assay method, but both methods indicated that isolate LT7 (identified as L. pentosus) showed the highest activity. The results of thin layer chromatography and high performance liquid chromatography, respectively, showed that tannic acid and gallic acid degraded to pyrogallol in resting L. pentosus LT7 cells. Therefore, the putative biochemical pathway for the degradation of tannic acid by L. pentosus implies that tannic acid is hydrolyzed to gallic acid and glucose, with the formed gallic acid being decarboxylated to pyrogallol. This study revealed the possible production of pyrogallol from tannic acid by the resting cell reaction with L. pentosus LT7.