|
|
|
| Registros recuperados: 98 | |
|
| |
|
|
| Morales Cabrera, Mercedes. |
| En este estudio se evaluó la actividad antimicrobiana de los extractos etanólicos, metanólicos y acuosos (frío y caliente) de cálices deshidratados de Hibiscus sabdariffa L. de cinco genotipos, sobre S. typhimurium (ATCC14028) y S. cholleraesuis (ATCC10708), se empleó el método difusión en agar. Se determinó la concentración mínima inhibitoria (CMI) y la concentración mínima bactericida (CMB) por dilución. Se analizó la influencia del pH en la actividad antimicrobiana. Así mismo se realizó la caracterización fenólica de los extractos etanólicos. El efecto antimicrobiano fue variable; los extractos de la variedad Alma blanca (cálices verdes), presentaron el mayor efecto antimicrobiano (diámetros de inhibición de12.5 a 19.5 mm) sobre ambos serotipos de... |
|
Palavras-chave: CMI; CMB; PH; Salmonella; Compuestos fenólicos; HPLC; MIC; MCB; Phenolic compounds; Fitopatología; Maestría. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/568 |
| |
|
|
| Morales Cabrera, Mercedes. |
| En este estudio se evaluó la actividad antimicrobiana de los extractos etanólicos, metanólicos y acuosos (frío y caliente) de cálices deshidratados de Hibiscus sabdariffa L. de cinco genotipos, sobre S. typhimurium (ATCC14028) y S. cholleraesuis (ATCC10708), se empleó el método difusión en agar. Se determinó la concentración mínima inhibitoria (CMI) y la concentración mínima bactericida (CMB) por dilución. Se analizó la influencia del pH en la actividad antimicrobiana. Así mismo se realizó la caracterización fenólica de los extractos etanólicos. El efecto antimicrobiano fue variable; los extractos de la variedad Alma blanca (cálices verdes), presentaron el mayor efecto antimicrobiano (diámetros de inhibición de12.5 a 19.5 mm) sobre ambos serotipos de... |
|
Palavras-chave: CMI; CMB; PH; Salmonella; Compuestos fenólicos; HPLC; MIC; MCB; Phenolic compounds; Fitopatología; Maestría. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/568 |
| |
|
| |
|
| |
|
| |
|
|
| ALENCAR,DANIEL B. DE; SILVA,SUZETE R. DA; PIRES-CAVALCANTE,KELMA M.S.; LIMA,REBECA L. DE; PEREIRA JÚNIOR,FRANCISCO N.; SOUSA,MÁRCIA B. DE; VIANA,FRANCISCO A.; NAGANO,CELSO S.; NASCIMENTO,KYRIA S. DO; CAVADA,BENILDO S.; SAMPAIO,ALEXANDRE H.; SAKER-SAMPAIO,SILVANA. |
| Natural antioxidants found in marine macroalgae are bioactive compounds known to play an important role in the prevention of diseases associated with aging cells protecting them against the oxidative damage. The purpose of this study was to evaluate the antioxidant and cytotoxic activity of ethanolic extracts of two species of red seaweeds, Amansia multifida and Meristiella echinocarpa. In vitro antioxidant activity was determined by DPPH radical scavenging assay, ferric-reducing antioxidant power (FRAP) assay, ferrous ion chelating (FIC) assay, β-carotene bleaching (BCB) assay and total phenolic content (TPC) quantification. Cytotoxicity was evaluated with the brine shrimp Artemia sp. lethality test. The TPC values observed in the present study indicated... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidant; Bioactive compounds; Cytotoxic; Phenolic compounds; Rhodophyta. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000100251 |
| |
|
| |
|
| |
|
|
| Mello,Fernanda Robert de; Bernardo,Claudia; Dias,Caroline Odebrecht; Gonzaga,Luciano; Amante,Edna Regina; Fett,Roseane; Candido,Lys Mary Bileski. |
| Pitaya peel can be used as a raw material for betalains extraction. The aim of this research was to quantify phenolic compounds, antioxidant activity and betalains on pitaya peel. Furthermore, evaluate the betalains stability against various pH conditions and exposure time of heating. The results showed that pitaya peel contains phenolic compounds and presented antioxidant activity. Moreover it showed high concentration of betalains (101.04mg equivalent to betanin. 100g-1) which were stable over a wide pH range (3.2 - 7.0) and were resistant to heating (100oC) up to 10 minutes at pH range from 3.7 to 5.5. Therefore, pitaya peel is a promising source of betalains which can be applied as a natural colorant for food. |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Betalains; Antioxidant activity; Colorant; Phenolic compounds. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000200323 |
| |
|
|
| Cola-Miranda,Maira; Barbastefano,Victor; Hiruma-Lima,Clélia Akiko; Calvo,Tamara Regina; Vilegas,Wagner; Brito,Alba Regina Monteiro Souza. |
| The genus Indigofera (Fabaceae) is used in folk medicine to treat gastrointestinal pain. In this study, we investigated the antiulcerogenic properties of Indigofera truxillensis Kunth. Oral administration of MeOH extract did not produce any signals of acute toxicity. The antiulcerogenic activity was assessed in different models of acute gastric ulcers (100% ethanol, piroxicam 30 mg.kg-1, hypothermic restraint stress and pylorus ligature) in mice and rats. The animals were treated with the drugs lanzoprazole (30 mg.kg-1) or cimetidine (100 mg.kg-1) as positive controls depending on the performed model. In another experiment with ethanol-induced ulcers in rats, N-ethylmaleimide (NEM), a sulfhydryl group blocker, was also used. The MeOH extract, at doses of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antiulcerogenic activity; Fabaceae; Indigofera truxillensis Kunth; Medicinal plant; Phenolic compounds. |
| Ano: 2006 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032006000300004 |
| |
|
|
| Chulaluck Charunuch; Plerncha Tangkanakul; Saovaluk Runggaeng. |
| Owing to creation of Thai rice snack with health benefits for higher potential in commercial scale, mulberry leaf was applied in the production of extruded snack product. Mulberry leaf in dried powder was mixed with rice, corn, soy, sugar, oil, vitamins and minerals to investigate the operating conditions with twin-screw extruder at varying mulberry content (5, 7.5 and 10%), screw speed (300 and 350 rpm) and feed moisture (13, 15 and 17%) in the 3 × 2 × 3 factorial experiment. The extrudates were examined of functional properties (antioxidant activity and phenolic compounds) and some physical characteristics (expansion ratio, bulk density, texture measurement and organoleptic test). The results had shown that at higher mulberry content (10%), the product... |
| Tipo: PhysicalObject |
Palavras-chave: Mulberry; Extruded snack; Antioxidant activity; Phenolic compounds; หม่อน; ฤทธิ์ต้านอนุมูลอิสระ; สารฟีโนลิก; เอ็กซ์ทรูดเดอร์; ผลิตภัณฑ์ขนมขบเคี้ยว; ผลิตภัณฑ์แปรรูปจากข้าว; คุณภาพทางประสาทสัมผัส. |
| Ano: 2006 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5256 |
| |
|
|
| Chulaluck Charunuch; Plernchai Tangkanakul; Saovaluk Runggaeng; Vayooh Sonted. |
| Owing to creation of Thai rice snack with health benefits for higher potential in commercial scale, mulberry leaf was applied in the production of extruded snack product. Mulberry leaf in dried powder was mixed with rice, corn, soy, sugar, oil, vitamins and minerals to investigate the operating conditions with twin-screw extruder at varying mulberry content (5, 7.5 and 10%), screw speed (300 and 350 rpm) and feed moisture (13, 15 and 17%) in the 3 × 2 × 3 factorial experiment. The extrudates were examined of functional properties (antioxidant activity and phenolic compounds) and some physical characteristics (expansion ratio, bulk density, texture measurement and organoleptic test). The results had shown that at higher mulberry content (10%), the product... |
| Tipo: Image |
Palavras-chave: Extruded Thai rice snack; Mulberry leaf; Antioxidant agent; Supplement; Functional properties; Physical characteristics; Phenolic compounds; อาหารขบเคี้ยว; ใบหม่อน; สารต้านอนุมูลอิสระ; สารเสริม; คุณสมบัติทางกายภาพ; คุณสมบัติทางเคมี. |
| Ano: 2012 |
URL: http://anchan.lib.ku.ac.th/agnet/handle/001/5136 |
| |
|
| |
|
|
| Tanniou, A.; Vandanjon, L.; Incera, M.; Serrano Leon, Esteban; Husa, V.; Le Grand, Jacqueline; Nicolas, Jean-louis; Poupart, N.; Kervarec, N.; Engelen, A.; Walsh, R.; Guerard, F.; Bourgougnon, N.; Stiger-pouvreau, Valerie. |
| Sargassum muticum, an invasive brown macroalga presently distributed along European Atlantic coasts from southern Portugal to the south coast of Norway, was studied on a large geographical scale for its production of phenolic compounds with potential industrial applications and their chemical and biological activities. S. muticum can produce high biomass in Europe, which could be exploited to supply such compounds. S. muticum was collected in Portugal, Spain, France, Ireland and Norway (three sites/country) to examine the effect of the latitudinal cline and related environmental factors. Assays focused particularly on polyphenols and their activities. Crude acetone–water extracts were purified using solid phase extraction (SPE) and antioxidant and... |
| Tipo: Text |
Palavras-chave: Antioxidant activities; Antibacterial activities; Latitudinal gradient; Phenolic compounds; Solid phase extraction; Sargassum muticum. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00171/28221/32175.pdf |
| |
|
|
| Moreira-Araújo,Regilda Saraiva dos Reis; Barros,Nara Vanessa dos Anjos; Porto,Rayssa Gabriela Costa Lima; Brandão,Amanda de Castro Amorim Serpa; Lima,Alessandro de; Fett,Roseane. |
| Abstract The aim of this study was to determine the content of bioactive compounds and antioxidant activity present in three fruit species from the Brazilian Cerrado: carnauba (Copernicia prunifera (Mill.) H.E. Moore), murici (Byrsonima crassifolia L. Rich)and oiti (Licania tomentosa (Benth) Fritsch). Among analyzed fruits, oiti showed the highest total phenolic content (1236.42 ± 34.06 mg GAE 100 g-1) followed by murici (468.90 ± 27.30 mg GAE 100 g-1) and carnauba (314.44 ± 9.50 mg GAE 100 g-1). Regarding the antioxidant activity, murici showed 4350.31 ± 1.85 µmol TEAC.100 g-1 and oiti showed 14721.69 ± 0.85 µmol TEAC.100 g-1. In addition, high content of anthocyanins was verified in carnauba (9.35 ± 0.00 mg-cy-3-glu.100 g-1), as well as carotenoids... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Antioxidants; Anthocyanins; Carotenoids; Phenolic compounds; Cerrado. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-29452019000300901 |
| |
|
|
| MONTENEGRO,GLORIA; PORTALUPPI,MARIANA C; SALAS,FRANCISCO A; DÍAZ,MARÍA F. |
| An ethanol extract prepared from the gametophyte Chilean native moss Sphagnum magellanicum was dried out, weighed and dissolved in distilled water. This extract was then assayed for its antibacterial activity against the G(-) bacteria Azotobacter vinelandii, Erwinia carotovora subsp. carotovora, Enterobacter aerogenes, Escherichia coli, Pseudomonas aeruginosa, Salmonella typhi, Vibrio cholerae, and the G(+) bacteria Staphylococcus aureus subsp. aureus, and Streptococcus type b. The growth of the cultures of E. carotovora subsp. carotovora, and V. cholerae was inhibited at a concentration of 581mg/ml of extract, while the cultures of E. coli, S. typhi and Streptococcus type b were inhibited at a concentration of 1.16 mg/mL of extract. The concentration of... |
| Tipo: Journal article |
Palavras-chave: Sphagnum magellanicum; Phenolic compounds; Antibacterial activity; MIC. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0716-97602009000200012 |
| |
|
|
| Matos,Amanda Veruska Silva de; Watanabe,Pedro Henrique; Freitas,Ednardo Rodrigues; Santos,Kassia Moreira; Araújo,Lina Raquel Santos; Nepomuceno,Rafael Carlos; Vieira,Alini Mari; Vieira,Eloisa Helena Mendes. |
| Abstract: The objective of this work was to evaluate the effects of the dietary inclusion of calcium anacardate on the performance, diarrhea incidence, blood parameters, intestinal morphometry, and pH of gastrointestinal contents in piglets from 21 to 42 days of age. Sixty weaned Topigs piglets, with initial weight of 6.049±0.311 kg, were distributed in the following treatments: diet with or without antibiotic growth promoter (zinc bacitracin) and diets supplemented with increasing levels of calcium anacardate (0.4, 0.8, and 1.2%), with six replicates and two animals per experimental unit. No differences in performance (21 to 42 days of age), blood parameters, and villus height:crypt depth ratio were found between piglets fed diets containing calcium... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Anacardic acid; Intestinal morphometry; Organic acids; Phenolic compounds; Post-weaning; Zinc bacitracin. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2017001201253 |
| |
|
|
| López López, Daniela. |
| La vainilla (Vanilla planifolia Jacks) es un recurso fitogenético originario de México, el fruto llamado vaina, tiene que ser beneficiado para ser consumido. En este trabajo se evaluó la calidad microbiológica de la vainilla por la presencia de enterobacterias, coliformes totales, mohos y levaduras, así como la cantidad de compuestos fenólicos por técnicas de HPLC (ácido 4-hidroxibenzóico, 4-hidroxibenzaldehído, ácido vainillínico y vainillina) durante el proceso de beneficio artesanal a fin de establecer puntos críticos de control. Se tomaron catorce muestras en diversas etapas del proceso desde la recepción, matado, ciclos de secado al sol alternados con sudor, oreado, depósito provisional y revisiones fitosanitarias, hasta vainilla beneficiada. Los... |
|
Palavras-chave: Vainillina; Calidad microbiológica; Compuestos fenólicos; Curado; Vainillin; Microbiological quality; Phenolic compounds; Cured; Fisiología Vegetal; Maestría. |
| Ano: 2013 |
URL: http://hdl.handle.net/10521/2048 |
| |
|
|
| Martínez Martínez, Talina Olivia. |
| La calidad sanitaria en los productos hortofrutícolas debe considerarse una prioridad en la producción de alimentos. Actualmente en México, existe una gran preocupación por las asociaciones de productores y gobierno federal para adoptar sistemas de producción que reduzcan riesgos de contaminación (SRRC). Para la implementación de estos sistemas, es necesario cumplir con una serie de requisitos, entre ellos se encuentra la validación de procesos. Un método inmediato para efectuar este requerimiento, es la evaluación de la calidad sanitaria desde el punto de vista microbiológico y toxicológico, lo que hace necesario determinar un plan de muestreo y las técnicas apropiadas para la detección y cuantificación de patógenos indicadores. Con este propósito, en... |
|
Palavras-chave: Salmonella; Escherichia coli; Pesticides; Phenolic compounds; Survival; Sample size; Entomología y Acarología; Doctorado. |
| Ano: 2011 |
URL: http://hdl.handle.net/10521/590 |
| |
| Registros recuperados: 98 | |
|
|
|
