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A new approach to microbial production of gallic acid BJM
Bajpai,Bhakti; Patil,Shridhar.
In a new approach to microbial gallic acid production by Aspergillus fischeri MTCC 150, 40gL-1 of tannic acid was added in two installments during the bioconversion phase of the process (25gL-1 and 15gL-1 at 32 and 44h respectively). The optimum parameters for the bioconversion phase were found to be temperature: 35ºC, pH: slightly acidic (3.3-3.5), aeration: nil and agitation: 250 rpm. A maximum of 71.4% conversion was obtained after 71h fermentation with 83.3% product recovery. The yield was 7.35 g of gallic acid per g of biomass accumulated and the fermenter productivity was 0.56 g of gallic acid produced per liter of medium per hour.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Tannase; Gallic acid; Tannic acid; Aspergillus fischeri.
Ano: 2008 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822008000400021
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Altered indirect hemagglutination method for easy serotyping of Haemophilus parasuis Arq. Bras. Med. Vet. Zootec.
Lorenson,M.S.; Miani,M.; Guizzo,J.A.; Barasoul,B.; Martínez-Martínez,S.; Rodríguez-Ferri,E.F.; Gutiérrez-Martín,C.B.; Kreutz,L.C.; Frandoloso,R..
ABSTRACT Glässer's disease is an emergent bacterial disease that affects swine husbandries worldwide causing important economic losses. The aetiological agent, Haemophilus parasuis, is currently divided in fifteen serovars but an increasing number of non-typeable serovars have been reported. Indirect hemagglutination (IHA) is indicated as a serotyping method for H. parasuis. In the present study, we describe an additional step that aims to work around a possible obstacle in the original protocol that may compromise the outcome of this assay. We observed that the choice of anticoagulant for blood collection influences and/or impairs spontaneous adsorption of H. parasuis antigens on sheep red blood cells (SRBCs). However, regardless of the anticoagulant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Haemophilus parasuis; Diagnosis; Tannic acid; Serotyping; Indirect hemagglutination.
Ano: 2017 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0102-09352017000100015
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Assessment of flatulence causing agents in Chickpea (Cicer arietinum L.) and their possible removal Ciênc. Tecnol. Aliment.
MAHMOOD,Talat; HAMEED,Tabasum; HASNAIN,Sabahat; ALI,Sartaj; QAYYUM,Abdul; MEHMOOD,Ayaz; LIAQUAT,Muhammad; KHAN,Sami Ullah; SAEED,Muhammad; KHAN,Ayub.
Abstract Flatulence and fullness of stomach is one of the most common problem associated with chickpea primary due to presence of some oligosaccharides and phenols. In this investigation Desi and Kabuli varieties were compared for these oligosaccharides and phenolic compounds. Furthermore, the effect of different processing and cooking methods such as soaking, cooking and germination in the reduction of these antiphysiological factors were are also studies. Maximum tannic acid (0.90 ± 0.20%) was observed in Parbat and C-44 while minimum (0.60 ± 0.04%) in Karak-2. Stachyose contents ranged between 1.10 ± 0.05 (Karak-3) to 1.42 ± 0.02% (Parbat) while raffinose was 0.63 ± 0.05(Karak-3) to 0.81 ± 0.02% (Dasht). The highest tannic acid content was reduced up to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Chickpea; Anti-nutritional factors; Tannic acid; Stachyose; Raffinose.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612018000100120
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Body lipid deposition in Nile tilapia fed on rations containing tannin. Repositório Alice
AIURA, F.S.; CARVALHO, M.R.B. de.
The aim of this work was to evaluate the effect of tannin sources and levels in rations, on the productive performance and body lipid deposition of Nile tilapias (Oreochromis niloticus) during the finishing phase. Three hundred and forty-two fishes were distributed in 18 tanks. Rations were prepared using corn, sorghum varieties, with low and high tannin content, and tannic acid at 0.08, 0.34, and 0.60%. Weight gain, apparent feed conversion and protein efficiency rate were not influenced by the treatments. The highest body lipid deposition was observed for the tannic acid treatment (14.39%), while the diet containing sorghum with high tannin content yielded leaner body (12.01%) than that of sorghum with low tannin content (13.31%). Diets containing...
Tipo: Artigo em periódico indexado (ALICE) Palavras-chave: Oreochromis niloticus; Tannic acid; Body fat; Sorghum; Ácido tânico; Gordura corporal; Sorgo.
Ano: 2007 URL: http://www.alice.cnptia.embrapa.br/handle/doc/120714
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Body lipid deposition in Nile tilapia fed on rations containing tannin PAB
Aiura,Felipe Shindy; Carvalho,Maria Regina Barbieri de.
The aim of this work was to evaluate the effect of tannin sources and levels in rations, on the productive performance and body lipid deposition of Nile tilapias (Oreochromis niloticus) during the finishing phase. Three hundred and forty-two fishes were distributed in 18 tanks. Rations were prepared using corn, sorghum varieties, with low and high tannin content, and tannic acid at 0.08, 0.34, and 0.60%. Weight gain, apparent feed conversion and protein efficiency rate were not influenced by the treatments. The highest body lipid deposition was observed for the tannic acid treatment (14.39%), while the diet containing sorghum with high tannin content yielded leaner body (12.01%) than that of sorghum with low tannin content (13.31%). Diets containing...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Oreochromis niloticus; Tannic acid; Body fat; Sorghum.
Ano: 2007 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2007000100007
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Characterization of a multi-tolerant tannin acyl hydrolase II from Aspergillus carbonarius produced under solid-state fermentation Electron. J. Biotechnol.
Valera,Larissa Serrani; Jorge,João Atílio; Guimarães,Luis Henrique Souza.
Background Tannases are enzymes with biotechnological potential produced mainly by microorganisms as filamentous fungi. In this context, the production and characterization of a multi-tolerant tannase from Aspergillus carbonarius is described. Results The filamentous fungus A. carbonarius produced high levels of tannase when cultivated under solid-state fermentation using green tea leaves as substrate/carbon source and tap water at a 1:1 ratio as the moisture agent for 72 h at 30°C. Two tannase activity peaks were obtained during the purification step using DEAE-Cellulose. The second peak (peak II) was purified 11-fold with 14% recovery from a Sepharose CL-6B chromatographic column. The tannase from peak II (tannase II) was characterized as a heterodimeric...
Tipo: Journal article Palavras-chave: Aspergillus; Microbial enzymes; Solid-state fermentation; Tannase; Tannic acid.
Ano: 2015 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582015000600013
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Characterization of a thermostable extracellular tannase produced under submerged fermentation by Aspergillus ochraceus Electron. J. Biotechnol.
Gonçalves,Heloísa Bressan; Riul,Alana Jacomini; Quiapim,Andréa Carla; Jorge,João Atílio; Guimarães,Luis Henrique Souza.
Background: Tannases are enzymes that may be used in different industrial sectors as, for example, food and pharmaceutical. They are obtained mainly from microorganisms, as filamentous fungi. However, the diversity of fungi stays poorly explored for tannase production. In this article, Aspergillus ochraceus is presented as a new source of tannase with interesting features for biotechnological applications. Results: Extracellular tannase production was induced when the fungus was cultured in Khanna medium with tannic acid as carbon source. The extracellular tannase was purified 9-fold with 2% recovery and a single band corresponding to 85 kDa was observed in SDS-PAGE. The native apparent molecular mass was estimated as 112 kDa. Optima of temperature and pH...
Tipo: Journal article Palavras-chave: Aspergillus ochraceus; Gallic acid; Tannase; Tannic acid; Tannin acyl hydrolase.
Ano: 2012 URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000500004
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Cross-linked coacervates of cashew gum and gelatin in the encapsulation of pequi oil Ciência Rural
Alexandre,Joana de Barros; Barroso,Tiago Linhares Cruz Tabosa; Oliveira,Marília de Albuquerque; Mendes,Francisco Rogênio da Silva; Costa,José Maria Correia da; Moreira,Renato de Azevedo; Furtado,Roselayne Ferro.
ABSTRACT: Pequi oil is rich in bioactive compounds which can be encapsulated to increase protection against extrinsic environmental factors. A delayed degradation of pequi oil may occur by using microencapsulation technology, in addition to masking unpleasant flavors and aromas. Complex coacervation is a technique based on the electrostatic interaction between two oppositely charged biopolymers which form a matrix complexed around an agent of interest. However, cross-linking the particles is often necessary in order to make them more rigid. The objective of this research was to produce and characterize pequi oil microparticles in a cashew gum (CG) and gelatin (GE) matrix cross-linked with tannic acid. Cross-linked pequi oil microparticles were produced by...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Microencapsulation; Complex coacervation; Cross-linking; Tannic acid; Encapsulation efficiency.
Ano: 2019 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019001200753
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Degradation of lignosulfonic and tannic acids by ligninolytic soil fungi cultivated under icroaerobic conditions BABT
Silva,Isis Serrano; Menezes,Cristiano Ragagnin de; Franciscon,Elisangela; Santos,Eder da Costa dos; Durrant,Lucia Regina.
Soil fungi were evaluated regarding their ability to degrade lignin-related compounds by producing the ligninolytic enzymes. Lignosulfonic and tannic acids were used as sole carbon sources during 30 days under microaerobic and very-low-oxygen conditions. The fungi produced lignin-peroxidase, manganese-peroxidase and laccase . Expressive degradations was observed by C18 reversed-phase HPLC, indicating the biodegradation potential of these fungi, showing more advantages than obligate anaerobes to decontaminate the environment when present naturally.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Lignosulfonic acid; Tannic acid; Ligninolytic enzymes; Microaerobic conditions; Soil fungi.
Ano: 2010 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132010000300026
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Evaluation of embryotoxic and embryostatic effects of the aqueous extract of Rhizophora mangle and tannic acid on eggs and larvae of Aedes aegypti Anais da ABC (AABC)
RODRIGUES NETO,AGEU A.; GOMES JÚNIOR,PLÍNIO P.; SILVA,MAURICIO C.; LIMA,CLÁUDIA S.A.; YARA,RICARDO; GUIMARÃES,EMÍLIA B.; SANTANA,EDUARDA S. DE; SILVA,LUZIA A. DA; LIRA,EDUARDO J.R.V. DE; VIEIRA,JEYMESSON R.C..
ABSTRACT Rhizophora mangle is an abundant plant in mangroves and tannic acid is a polyphenol produced by the secondary metabolism of plants. The aim of the study was to evaluate the embryotoxic and embriostatic effects of the aqueous extract of R. mangle and synthetic tannic acid on eggs and larvae of Aedes aegypti. A. aegypti eggs were exposed in duplicate at concentrations of 250, 500, 750 and 1000 µg/mL of extract and tannic acid for a period of 14 days. Mineral water was used as a negative control. The eggs were observed and counted in a stereomicroscope (1.2x). In all extract concentrations there was stimulation in hatching in relation to the control, but only in concentration of 750 mg/mL it was statistically significant. In tannic acid (250µg/ml)...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aedes aegypti; Embryostatic; Embryotoxic; Rhizophora mangle; Tannic acid.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000502141
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Silver and gold nanoparticles from tannic acid: synthesis, characterization and evaluation of antileishmanial and cytotoxic activities Anais da ABC (AABC)
LOPES,LOURDES C.S.; BRITO,LUCAS M.; BEZERRA,THAYLLAN T.; GOMES,KLEYTON N.; CARVALHO,FERNANDO A. DE A.; CHAVES,MARIANA HELENA; CANTANHÊDE,WELTER.
Abstract Gold (Au0) and silver (Ag0) nanoparticles were synthesized using tannic acid (TA) as both reducing and stabilizer. Nanoparticles formation, stability, and interaction with TA were compared to citrate-coated nanoparticles and monitored by UV-Vis, zeta potential, and transmission electron microscopy. TA coating resulted in a red-shift and broadening of bands compared to citrate-coated nanoparticles (NPs-Cit). AgNPs-TA and AuNPs-TA are negatively charged with mean surface charge of -29.4 mV and -29.6 mV, respectively. TEM images showed polydispersety of AuNPs-TA (6-42 nm) and aggregation of AgNPs-TA (12-71 nm). In vitro assays of Leishmania amazonensis promastigotes showed an increment of antileishmanial activity for AgNPs-TA in relation to...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Green synthesis; Leishmaniasis; Metallic nanoparticles; Tannic acid.
Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000602679
Registros recuperados: 11
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