Tannin
Mostrando 13-24 de 148 artigos, teses e dissertações.
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13. Síntesis y caracterización de “tanatos” de lantano como inhibidores de la corrosión
ABSTRACT Tannins are polyphenols synthesized by plants. They are found in Quebracho (Schinopsis Balansae) wood, Tara (Caesalpinia spinosa) fruits, etc. They have been incorporated in the coating industry as "antifouling" agents and as corrosion inhibitors in acidic solutions. Moreover, lanthanum solutions have a great inhibitory effect over SAE 1010 steel co
Matéria (Rio J.). Publicado em: 19/07/2018
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14. Selective Adsorption of AuIII from Aqueous Solution Using 2,5-Dimercapto-1,3,4-thiadiazole Modified Persimmon Tannin
A one-pot synthesized persimmon tannin (PT)-based novel biosorbent modified with 2,5-dimercapto-1,3,4-thiadiazole (DMTD) was prepared for the selective adsorption of AuIII from aqueous mixtures. The synthesized biosorbent was designated as DMTD-PT and characterized using elemental analysis, zeta potential, Fourier transform infrared (FTIR) spectroscopy and X
J. Braz. Chem. Soc.. Publicado em: 2018-07
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15. Measurement of Tannic Substances in Forest Species
ABSTRACT This study aimed to quantify the tannic content of the barks and fruit of angico-vermelho, jurema-preta and acacia-negra using skin powder as detanizador agent. Materials from these species were ground and classified, with 12.5g of air dried particles subjected to extraction using a steam jacket type extractor to obtain 1000 ml of solution, using a
Floresta Ambient.. Publicado em: 14/06/2018
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16. Phytochemistry and antimicrobial activity of Campomanesia adamantium
ABSTRACT Campomanesia adamantium (Cambess.) O. Berg., Myrtaceae, is a plant popularly used for its anti-inflammatory, anti-diarrhoeal and urinary antiseptic activities. The aims of this study were to obtain the crude ethanolic extract and the hexane, dichloromethane, ethyl acetate, aqueous and concentrated aqueous tannin fractions from C. adamantium leaves,
Rev. bras. farmacogn.. Publicado em: 2018-06
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17. Alpha amylase and Alpha glucosidase inhibitory effects of aqueous stem extract of Salacia oblonga and its GC-MS analysis
ABSTRACT Our present investigation deals with the phytochemical screening, estimation of total flavonoids, terpenoids and tannin contents to evaluate the anti-diabetic activities of Salacia oblonga stem followed by GC-MS analysis. It explores the natural compounds and the potential α-amylase and α-glucosidase inhibitory actions of stem extracts. The aqueou
Braz. J. Pharm. Sci.. Publicado em: 14/05/2018
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18. Tannic extract potential as natural wood preservative of Acacia mearnsii
ABSTRACT High toxicity of the preservatives most frequently used in wood treatment and the resulting risks of handling pose a threat to small producers and to the environment. In an attempt to mitigate these problems, the present study was conducted with the objective of evaluating the preservative effect of tannic extract on biodeterioration of Acacia mearn
An. Acad. Bras. Ciênc.. Publicado em: 07/12/2017
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19. Effect of Endophytic Fungal Associations on the Chemical Profile of in vitroVochysia divergens Seedlings
Vochysia divergens (Vochysiaceae) is considered an invasive species in the wetlands of the Brazilian Pantanal, which hinders the cultivation of agricultural species. In this study, we evaluated the chemical profile by HPLC-DAD (high-performance liquid chromatography-diode array detector) of leaves extracts from V. divergens seedlings inoculated with endophyt
J. Braz. Chem. Soc.. Publicado em: 2017-12
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20. Evaluation of Medicinal Values of Gymnopetalum chinense (Lour.) Merr., a Lesser Known Cucurbit from Eastern Ghats of India
ABSTRACT >The in vitro antimicrobial activity of Gymnopetulum chinense (Cucurbitaceae), a lesser known climber of Eastern Ghats and recently recorded species from Odisha, India was studied against five selected human pathogenic bacteria (Streptococcus mutans, S. pyogenes, Vibrio cholerae, Shigella flexneri and Salmonella typhi), by agar well diffusion (AWD),
Braz. arch. biol. technol.. Publicado em: 05/10/2017
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21. Using Magnetized (Fe3O4 / Biochar Nanocomposites) and Activated Biochar as Adsorbents to Remove Two Neuro-Active Pesticides from Waters
This work describes the removal of pesticides from water using activated and magnetized biochars produced from exhausted husk, and dry tannin from barks of black wattle (Acacia mearnsii De Wild.). These materials were characterized using chemical, spectroscopic, thermal, solid structure and surface area techniques. The activated and magnetized biochars were
J. Braz. Chem. Soc.. Publicado em: 2017-10
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22. Potential nutritional and antioxidant activity of various solvent extracts from leaves and stem bark of Anisophyllea laurina R. Br ex Sabine used in folk medicine
ABSTRACT Anisophyllea laurina is a plant that has been used in folk medicine to treat malaria, dysentery, diabetes, toothache and various skin diseases. Leaves extract had protein content of 9.68% and a high calcium content of 25084.317 mg/100 g while stem bark extract was found to contain greater amounts of calcium (8560.96 mg/100 g), potassium (7649.47 mg/
Braz. J. Pharm. Sci.. Publicado em: 27/07/2017
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23. Screening of traditional South African leafy vegetables for specific anti-nutritional factors before and after processing
Abstract This study investigated the effect of processing on anti-nutritional factors of thirteen traditional leafy vegetables collected in Kwa Zulu-Natal, South Africa. The aim was to determine whether processing reduced anti-nutrient levels of leafy vegetables. The vegetables were boiled in a plant-to-distilled water ratio of 1:4 (w/v) at 97 °C for a time
Food Sci. Technol. Publicado em: 01/06/2017
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24. Antiproliferative activity in tumor cell lines, antioxidant capacity and total phenolic, flavonoid and tannin contents of Myrciaria floribunda
ABSTRACT Myrciaria floribunda (H. West ex Willd.) O. Berg, Myrtaceae, is a native plant species of the Atlantic Rain Forest, from north to south of Brazil. The lyophilized ethyl acetate extract from the leaves of M. floribunda was investigated for its antiproliferative activity in tumor cell lines, antioxidant capacity and its total phenolic, flavonoid and t
An. Acad. Bras. Ciênc.. Publicado em: 02/05/2017