Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

English (EN)·Polski (PL)·Yкраїнський (UK)
Przejdź do strony domowej biblioteki Centralna Biblioteka Wojskowa Link otwiera się w nowym oknie Logo biblioteki Prolib Integro - strona głównaCentralna Biblioteka Wojskowa

Wyszukujesz frazę "tannic acid" wg kryterium: Temat

  Lista filtrów
Wyrównaj
    Wyświetlanie 1-12 z 12
    Tytuł:
    Characterization of chitosan, collagen, hyaluronic acid blends crosslinked by tannic acid addition
    Autorzy:
    Sionkowska, A.
    Kaczmarek, B.
    Kołodziejczak, A.
    Markiewicz, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/285687.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    biopolymers
    biomaterials
    tannic acid
    Źródło:
    Engineering of Biomaterials; 2016, 19, 138; 43
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Morphological studies of tissues stabilized by glutaraldehyde and tannic acid
    Autorzy:
    Turek, B.
    Marcinkowski, A.
    Cwalina, B.
    Nożyński, J.
    Dzierżewicz, Z.
    Powiązania:
    https://bibliotekanauki.pl/articles/286147.pdf
    Data publikacji:
    2009
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    glutaraldehyde
    tannic acid
    porcine pericardium
    microstructure
    nanostructure
    Opis:
    Despite the disadvantages of glutaraldehyde (GA)-stabilization of tissues, it is the method most often used for xenogeneic tissues preparation. Nowadays, partial elimination of drawbacks of this method is achieved by using GA in the mixture with other crosslinking reagents, which completes the stabilization effects and acts synergistically. The aim of this work was to determine microstructure and nanostructure of porcine pericardium stabilized by GA and tannic acid (TA). The microstructure was examined by optical microscopy and the nanostructure by atomic force microscopy (AFM). Different results on the level of micro- and nanostructure were observed. No essential changes in the tissue morphology after crosslinking with GA and TA were observed under optical microscope, but significant morphological differences were revealed in AFM studies.
    Źródło:
    Engineering of Biomaterials; 2009, 12, no. 89-91; 32-34
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Characterisation of chitosan after cross-linking by tannic acid
    Autorzy:
    Sionkowska, Alina
    Kaczmarek, Beata
    Lewandowska, Katarzyna
    Powiązania:
    https://bibliotekanauki.pl/articles/1035183.pdf
    Data publikacji:
    2014
    Wydawca:
    Sieć Badawcza Łukasiewicz - Polskie Towarzystwo Chitynowe
    Tematy:
    chitosan
    cross-linking
    mechanical properties
    tannic acid
    Opis:
    Chitosan is widely applied in biomedical and cosmetic fields. For this reason, there is a need to modify this biopolymer to achieve new properties of chitosan-based materials. The properties of chitosan can be modified by several cross-linking methods. In this work, we used the chemical cross-linking of chitosan with tannic acid, after which cross-linked chitosan was shaped into a 3D structure by the lyophilisation process. For the material obtained, FTIR-ATR analysis was performed to characterise the structure of cross-linked chitosan. Moreover, mechanical properties and swelling properties were measured for chitosan before and after cross-linking. The results show that several properties of chitosan can be changed after cross-linking by tannic acid. The positions of bands in the FTIR spectra of chitosan were shifted after cross-linking. Mechanical properties were altered for cross-linked chitosan. However, the highest compressive modulus was observed for pure chitosan. The lowest compressive modulus was observed for chitosan cross-linked with 20 wt% of tannic acid. Swelling behaviour also depends on the cross-linking of chitosan. It decreases for chitosan after cross-linking by tannic acid. Overall, the properties of cross-linked chitosan depend on the amount of tannic acid used for modification. This method of cross-linking can be useful for obtaining materials with specific properties.
    Źródło:
    Progress on Chemistry and Application of Chitin and its Derivatives; 2014, 19; 135-138
    1896-5644
    Pojawia się w:
    Progress on Chemistry and Application of Chitin and its Derivatives
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Improvement of tannase production under submerged fermentation by Aspergillus niger FBT1 isolated from a mangrove forest
    Autorzy:
    George, D.S.
    Ong, C.-B.
    Powiązania:
    https://bibliotekanauki.pl/articles/81128.pdf
    Data publikacji:
    2013
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    tannase
    tannic acid
    submerged fermentation
    Aspergillus niger
    mangrove forest
    Opis:
    Aspergillus niger FBT1, a local extracellular strain for tannase production, was isolated from soil collected from Matang Mangrove Forest Reserve in Perak, Malaysia. This fungus strain was cultivated in an Erlenmeyer flask under a submerged fermentation system. Medium compositions play a very important role in enhancing enzyme production during fermentation. The production of tannase by A. niger FBT1 increased significantly (95%) when the medium compositions and various process parameters were optimized. Incubation for 72 hours (30EC, pH 7) in medium complemented with sodium nitrate was found optimal. Additional supplementation with tannic acid (2% w/v) as the sole carbon source strongly increased the yield of the enzyme.
    Źródło:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology; 2013, 94, 4
    0860-7796
    Pojawia się w:
    BioTechnologia. Journal of Biotechnology Computational Biology and Bionanotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tannic acid as a hydrophobicity modifier for galena in the presence of metal ions
    Autorzy:
    Guler, T.
    Polat, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/109716.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    tannic acid
    galena
    hydrophobicity
    dithiophosphinate
    standard formation potential
    conditioning time
    Opis:
    This study was performed to determine the effect of tannic acid (TA) on hydrophobicity of galena using Taguchi’s design of experimental methodology. Roles of metal ions, dithiophosphinate (DTPI) concentration, and conditioning time on TA-galena interaction were tested by contact angle measurements. Results were evaluated by analysis of variance (ANOVA) test. DTPI was found to be the most effective parameter on the hydrophobicity followed by TA and nobility of metal ions. Effect of conditioning time was statistically insignificant. Electrochemical activity of metal ions became effective on TA-galena interaction: more active metals exhibit synergic effect with TA on the hydrophilicity of galena whereas more noble metals reduced the adverse impact of TA. Taguchi’s design revealed that interactions between experimental variables were not statistically significant.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2017, 53, 1; 5-16
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The behaviour of tannic acid adsorption on fluorite surface: isotherm, kinetic and thermodynamic studies
    Autorzy:
    Tangarfa, Mariam
    Semlali Aouragh Hassan, Naoul
    Powiązania:
    https://bibliotekanauki.pl/articles/2146850.pdf
    Data publikacji:
    2022
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    fluorite
    tannic acid
    adsorption
    kinetic
    modelling
    isotherm
    thermodynamics
    reactional parameters
    Opis:
    Fluorite is an important mineral to produce hydrofluoric acid. As fluorite resources contain calcite as a gangue mineral, the separation between these two calcium containing minerals is difficult. Tannic acid is the most commonly used reagent as a depressant to separate fluorite from calcite by flotation. To enhance this separation, it is so primordial to understand tannic acid physicochemical reactivity via these minerals. Therefore, the aim of this work is to investigate the mechanism of tannic acid adsorption on the fluorite surface by experimental study using isotherm, kinetic and thermodynamic. Adsorption isotherm modelling results showed that the adsorption process is well described by Sips model. On the other hand, the kinetic and thermodynamic require firstly the adsorption study as a function of three main reactional parameters including initial tannic acid concentration, solution pH and temperature. This study showed that acidic pH as well as initial tannic acid concentration increase and temperature decrease promote the studied adsorption. These finding were then exploited to determine the adsorption mechanism by pseudo n order kinetic model adjustment to experimental kinetic data using nonlinear regression method. Obtained high correlation coefficient and low mean absolute error at 95 % confidence level showed good agreement of experimental kinetic data with the tested model. These results revealed that the mechanism of tannic acid adsorption onto fluorite was attributed to a chemical reaction. In addition, the thermodynamic study showed that the studied adsorption process was exothermic.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2022, 58, 1; 77--87
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Preparation and characterization of calcite for tannic acid adsorption: Optimization by response surface methodology coupled by Box-Cox transformation procedure
    Autorzy:
    Tangarfa, Mariam
    Hassani, Naoul Semlali Aouragh
    Alaoui, Abdallah
    Powiązania:
    https://bibliotekanauki.pl/articles/1447160.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
    Tematy:
    calcite
    tannic acid
    adsorption parameters
    optimization
    Response Surface Methodology
    Box-Cox transformation
    Opis:
    Calcite depression is the most effective physicochemical process to valorize fluorine mineral. This process is achieved by adsorption of tannic acid, as the commonly used reagent, onto calcite. Adsorption investigation is very important in mineral processing. The present work focuses on optimization of physicochemical parameters of tannic acid adsorption onto calcite. Experimental study is carried out by a response surface methodology based on Box-Behnken design. Obtained results are exploited to develop a statistical model. Analysis of variance and residuals are performed to check the significance of tested models. Among these models, Cox-Box model predicts very well the obtained experimental data. This model shows that initial tannic acid concentration and solution pH as well as their interactions are the most significant parameters. Optimal conditions are achieved using the obtained statistical model. The present investigation is an important preliminary step to better understand calcite flotation behavior using tannic acid as a depressant.
    Źródło:
    Physicochemical Problems of Mineral Processing; 2021, 57, 3; 36-45
    1643-1049
    2084-4735
    Pojawia się w:
    Physicochemical Problems of Mineral Processing
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Eco-Friendly Soaking Process Using Tannic Acid as an Alternative Bactericide
    Autorzy:
    Zengin, A. C. A.
    Çolak, S. M.
    Zengin, G.
    Kiliç, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/204698.pdf
    Data publikacji:
    2014
    Wydawca:
    Polska Akademia Nauk. Czytelnia Czasopism PAN
    Tematy:
    bactericidal
    leather industry
    soaking
    tannic acid
    środek bakteriobójczy
    przemysł skórzany
    moczenie
    tanina
    Opis:
    Eco-friendly leather processes based on the usage of natural products have become a potentially attractive issue for leather industry during the last few decades. Synthetic protective chemicals like bactericides used in most soaking process are known as hazardous substances and cause tannery effluents with high concentrations of Chemical Oxygen Demand (COD). In the present study, the effect of tannic acid on microorganisms, skin, wool and effluent were investigated in order to demonstrate the applicability of tannic acid in soaking process instead of commonly used bactericides. The bacterial load (cfu/ml), COD and Nitrogen Content (N) of the soaking effluents and Total Kjeldahl Nitrogen (TKN) content of skins and wools were investigated. Application of 0.5 and 1 wt% tannic acid concentrations was more effective than commercial bactericide, while comparable results were achieved by 0.1 and 0.3 wt% tannic acid. The application of tannic acid for soaking process resulted in lower COD and N values of effluents. The results show that tannic acid has the potential to be an alternative, eco-friendly bactericide for leather industry by reducing the pollution of leather soaking process.
    Źródło:
    Archives of Environmental Protection; 2014, 40, 1; 3-12
    2083-4772
    2083-4810
    Pojawia się w:
    Archives of Environmental Protection
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    The properties of fish skin collagen films after cross-linking with tannic acid
    Autorzy:
    Sionkowska, Alina
    Lewandowska, Katarzyna
    Szulc, Marta
    Brudzyńska, Patrycja
    Kulka, Karolina
    Piwowarski, Łukasz
    Powiązania:
    https://bibliotekanauki.pl/articles/27324038.pdf
    Data publikacji:
    2023
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    collagen
    biomaterials
    medicine
    wound dressing
    cross-linking
    tannic acid
    kolagen
    biomateriały
    medycyna
    Opis:
    Over the last three decades, an increasing interest in the preparation of new materials for wound healing has been observed. Collagen is a widely used biomaterial, and especially fish skin collagen is more and more popular among scientists. This study aimed to obtain thin films from native fish skin collagen and collagen cross-linked with tannic acid. Infrared spectroscopy, mechanical test, topographic imaging, and swelling test were used to characterize the features of the mentioned films. Statistical evaluation of the results was conducted with the Q-Dixon test. Infrared spectroscopy analysis showed that in the IR spectra of examined biomaterials, there are slight shifts in band positions after tannic acid cross-linking. The mechanical properties of the cross-linked material were different from those of the native collagen film. The Young’s modulus was higher for cross-linked collagen, whereas the elongation at break was lower than for pure collagen. The swelling of the collagen films increased after cross-linking with tannic acid. Swelling tests indicated that collagen cross-linked with tannic acid absorbs more water than before cross-linking. The properties of collagen films were significantly improved after tannic acid cross-linking. All alterations can be a result of collagen cross-linking by tannic acid, probably by forming hydrogen bonds between collagen and tannic acid.
    Źródło:
    Engineering of Biomaterials; 2023, 26, 168; 9--14
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Otrzymywanie oraz charakterystyka skafoldów sieciowanych kwasem taninowym na bazie chitozanu, kolagenu oraz kwasu hialuronowego
    Preparation and characterization of tannic acid cross-linked scaffolds made of chitosan, collagen and hyaluronic acid
    Autorzy:
    Kaczmarek, B.
    Sionkowska, A.
    Markiewicz, E.
    Kołodziejczak, A.
    Powiązania:
    https://bibliotekanauki.pl/articles/285464.pdf
    Data publikacji:
    2016
    Wydawca:
    Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
    Tematy:
    kolagen
    chitozan
    kwas hialuronowy
    sieciowanie
    kwas taninowy
    collagen
    chitosan
    hyaluronic acid
    cross-linking
    tannic acid
    Opis:
    Biopolimery są szeroko stosowane w dziedzinie biomateriałów. Są biokompatybilne, biodegradowalne oraz nietoksyczne dla ludzkiego organizmu. Celem niniejszych badań eksperymentalnych było otrzymanie kompozytów na bazie kolagenu, chitozanu oraz kwasu hialuronowego modyfikowanych poprzez dodatek kwasu taninowego. Biopolimery zostały wymieszane poprzez sporządzenie 1% roztworów każdego z nich, przy czym kolagen oraz chitosan były wymieszane w stosunku wagowym 50/50 oraz do tej mieszaniny zastosowano 1, 2 i 5 (w/w%) dodatek kwasu hialuronowego. Do mieszaniny dodano następnie 2, 5, 10 oraz 20 (w/w%) kwasu taninowego oraz otrzymano skafoldy metodą suszenia sublimacyjnego. Próbki zarówno z dodatkiem kwasu taninowego jak i bez niego zostały scharakteryzowane poprzez pomiar ich właściwości mechanicznych, analizę spektroskopii w podczerwieni (IR-ATR) oraz obrazowanie przy użyciu skaningowego mikroskopu elektronowego (SEM). Ponadto wyznaczono porowatość oraz gęstość każdego ze skafoldów. Wszystkie otrzymane próbki były porowate i nie zaobserwowano znaczących różnic w strukturze na zdjęciach SEM. Na widmach IR-ATR charakterystyczne piki polimerów takie jak: amidowe I, II, III oraz A były przesunięte po dodatku taniny w wyniku pojawienia się wiązań wodorowych oraz oddziaływań elektrostatycznych. Wyniki pokazują, że kwas taninowy może być wykorzystany jako czynnik sieciujący stosowany w celu modyfikacji właściwości biomateriałów.
    Biopolymers are widely used in biomaterials science. They are biocompatible, biodegradable and non-toxic for human body. The aim of the study was to obtain scaffolds made of chitosan, collagen and hyaluronic acid modified by addition of tannic acid. The biopolymers were mixed as 1% solution, where collagen and chitosan were mixed in 50/50 (w/w%) and 1, 2 and 5 (w/w%) of hyaluronic acid was added. 2, 5, 10 and 20 (w/w%) of tannic acid was added to the mixture and scaffolds were obtained by freeze drying method. Samples with the tannic acid as well as without it were characterized by the mechanical parameters measurement, infrared spectroscopy (IR-ATR) and scanning electron microscopy (SEM). Moreover the porosity and density of the scaffolds were determined. The addition of tannic acid improves the mechanical properties and porosity of the scaffolds. All the scaffolds were porous and no significant changes in the structure were observed at the SEM images. In the IR-ATR spectra characteristic peaks of polymers as amide I, II, III and A were shifted after addition of tannic acid due to the presence of new hydrogen bonds and electrostatic interactions. The results show that tannic acid can be used as a cross-linking agent to modify the properties of the scaffolds.
    Źródło:
    Engineering of Biomaterials; 2016, 19, 136; 21-27
    1429-7248
    Pojawia się w:
    Engineering of Biomaterials
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Effect of natural phenols on the catalytic activity of cytochrome P450 2E1
    Autorzy:
    Mikstacka, Renata
    Gnojkowski, Jerzy
    Baer-Dubowska, Wanda
    Powiązania:
    https://bibliotekanauki.pl/articles/1043696.pdf
    Data publikacji:
    2002
    Wydawca:
    Polskie Towarzystwo Biochemiczne
    Tematy:
    resveratrol
    tannic acid
    polyphenols
    inhibition kinetics
    mechanism-based inhibition
    CYP2E1
    protocatechuic acid
    Opis:
    The effect of protocatechuic acid, tannic acid and trans-resveratrol on the activity of p-nitrophenol hydroxylase (PNPH), an enzymatic marker of CYP2E1, was examined in liver microsomes from acetone induced mice. trans-Resveratrol was found to be the most potent inhibitor (IC50 = 18.5 ± 0.4 mM) of PNPH, while protocatechuic acid had no effect on the enzyme activity. Tannic acid with IC50 = 29.6 ± 3.3 mM showed mixed- and trans-resveratrol competitive inhibition kinetics (Ki = 1 mM and 2.1 mM, respectively). Moreover, trans-resveratrol produced a NADPH-dependent loss of PNPH activity, suggesting mechanism-based CYP2E1 inactivation. These results indicate that trans-resveratrol and tannic acid may modulate cytochrome P450 2E1 and influence the metabolic activation of xenobiotics mediated by this P450 isoform.
    Źródło:
    Acta Biochimica Polonica; 2002, 49, 4; 917-925
    0001-527X
    Pojawia się w:
    Acta Biochimica Polonica
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Tannic acid as a cost-effective substitute for saponin in soil remediation
    Autorzy:
    Gusiatin, Z. M.
    Bułkowska, K.
    Pokój, T.
    Powiązania:
    https://bibliotekanauki.pl/articles/363196.pdf
    Data publikacji:
    2014
    Wydawca:
    Uniwersytet Warmińsko-Mazurski w Olsztynie
    Tematy:
    RI index
    saponin
    soil washing
    tannic acid
    indeks RI
    saponina
    przemywanie gleby
    kwas taninowy
    Opis:
    The efficiency of soil washing with tannic acid (TA) and saponin (SAP) was compared. In the contaminated soil, Cu and Zn were more mobile than Pb. At 3% concentration, both biosurfactants removed similar amounts of Zn (48 and 54%, respectively), SAP removed somewhat more Cu (81%), and TA removed considerably more Pb (63%). SAP removed more Cu due to its higher number of carboxylic groups. TA dissolved the more stable forms of metals because of its higher acidity resulting from the content of phenolic groups. Based on the potential ecological Risk Index (RI), both biosurfactants reduced the risk posed by the contaminated soil from "considerable" (RI=364 ) to "low" (RI=118, on average). These results, and the fact that TA is more than three times less expensive than SAP, make TA an attractive substitute for SAP in soil washing.
    Źródło:
    Environmental Biotechnology; 2014, 10, 2; 66-72
    1734-4964
    Pojawia się w:
    Environmental Biotechnology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-12 z 12

      Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies