Consulta: creatorFacets:"Serna-Cock,Liliana"
Registros recuperados: 7
Data/hora: 16/06/2024 19:08:15

Effects of fermentation substrates and conservation methods on the viability and antimicrobial activity of Weissella confusa and its metabolites
Provedor de dados: 69
Autores: Serna-Cock,Liliana; Enríquez-Valencia,Cruz E; Jiménez-Obando,Eliana M; Campos-Gaona,Rómulo.
Lactic acid bacteria produce metabolites with antagonistic activity against other bacteria. However, growth conditions and conservation methods may reduce the viability and antimicrobial activity of lactic acid bacteria. This study evaluated the effects of fermentation substrate, lyophilization (freeze-drying) and refrigeration on the viability and antimicrobial activity of Weissella confusa strain and its metabolites against pathogens responsible for bovine mastitis. W. confusa strain was grown in MRS broth and milk supplemented with yeast extract and glucose (MYEG). The collected fractions were preserved by lyophilization or under refrigeration at 4ºC. Every seven days, the viability of W. confusa strain and the stability of its metabolites were...
Tipo: Journal article
Palavras-chave: Conservation; Inhibition; Lactic acid bacteria; Lyophilization.
Ano: 2012
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582012000300006

Guava Psidium guajava seed flour and dry Aspergillus niger mycelium as nitrogen sources for the production of biomass and antimicrobial compounds produced by Weissella confusa
Provedor de dados: 69
Autores: Serna-Cock,Liliana; Mera-Ayala,José Daniel; Angulo-López,Jorge Eduardo.
Background: The fermentation substrate efficiency of glucose supplemented with guava seed flour (GGSF) or glucose supplemented with dry Aspergillus niger mycelium (GANM) was evaluated during the production of biomass and antimicrobial compounds by the lactic acid bacteria Weissella confusa. Results: The fermentation substrate efficiency was measured by comparing the biomass formation, substrate consumption, substrate conversion, antimicrobial activity and product yield. The antimicrobial activity was measured against a commercial Staphylococcus aureus strain. The results were compared against fermentations performed in a commercial substrate (CS), the MRS (Man-Rogosa-Sharpe) substrate. The fermentations were performed discontinuously for 4 hrs at 100 rpm...
Tipo: Journal article
Palavras-chave: Agroindustrial residue; Bacteriocin; Biomass; Inhibition.
Ano: 2013
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0717-34582013000600017

Natural fibers for hydrogels production and their applications in agriculture
Provedor de dados: 109
Autores: Serna-Cock,Liliana; Guancha-Chalapud,Marcelo Alexander.
Abstract This paper presents a review on hydrogels applied to agriculture emphasizing on the use of natural fibers. The objectives were to examine, trends in research addressed to identify natural fibers used in hydrogels development and methods for modifying natural fibers, understand factors which determine the water retention capacity of a hydrogel. Consequently, this paper shows some methodologies used to evaluate the hydrogels efficiency and to collect in tables, relevant information in relation to methods of natural fibers modification and hydrogel synthesis. It was found that previous research focused on hydrogels development processed with biodegradable polymers such as starch, chitosan and modified natural fibers, cross-linked with potassium...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Hydrogels; Methods of modifying fiber; Nanofibers; Superabsorbent; Water retention capacity.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000400495

Actividad antimicrobiana y cinética de fermentación de Weissella confusa contra Xanthomonas albilineans
Provedor de dados: 109
Autores: Serna-Cock,Liliana; Camargo-Guarnizo,Andrés Felipe; Rengifo-Guerrero,Carlos Andrés.
Se evaluó la actividad antimicrobiana de Weissella confusa, una bacteria ácido láctica, contra Xanthomonas albilineans, microrganismo productor de la escaldadura de la hoja en la caña de azúcar. Se midió la cinética de fermentación de la bacteria ácido láctica en sustrato comercial (MRS) y en residuos agrícolas de cosecha de caña de azúcar (RAC) provenientes de semilleros con 7 meses de edad. Se realizaron fermentaciones sumergidas a 32 °C, cada hora hasta 4 horas, a pH 6 y 100 r.p.m. de agitación. Cada hora se midieron la producción de biomasa, el consumo de sustrato y actividad antimicrobiana. Weissella confusa presentó actividad antimicrobiana contra la bacteria fitopatógena X. albilineans en ambos sustratos, los halos de inhibición presentaron...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bacterias ácido lácticas; Caña de azúcar; Escaldadura de la hoja; Residuos de cosecha.
Ano: 2013
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122013000200002

Efecto de la aplicación de 1-Metilciclopropeno por inmersión sobre las características físicas, químicas y fisiológicas de pitahaya amarilla (Selenicereus megalanthus How) mínimamente procesada
Provedor de dados: 109
Autores: Serna-Cock,Liliana; Segura-Rojas,Diego Fernando; Ayala-Aponte,Alfredo.
La pitahaya amarilla (Selenicereus megalanthus How) es una fruta exótica con gran potencial comercial. No obstante, sólo ha sido aprovechada comercialmente como fruta entera, sin procedimientos que le den valor agregado y mayor tiempo de vida de anaquel. En este trabajo se evaluó la aplicación de 200 mg%lt de 1-MCP (Metylciclopropene) en pitahaya amarilla mínimamente procesada (rodajas con cáscara y sin cáscara), empacada al vacío y almacenada bajo refrigeración, sobre la intensidad respiratoria y parámetros de calidad como sólidos solubles, acidez total titulable, pérdida de peso, azúcares totales, firmeza y color. La aplicación de 1-MCP aumentó la producción de CO2, lo cual se manifestó en mayores contenidos de sólidos solubles y azúcares totales, pero...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Color; Firmeza; Fruta tropical; Sólidos soluble; Tasa respiratoria; Vitamina C.
Ano: 2011
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122011000300003

Effect of plantain ( Musa paradisiaca L. cv. Dominico Harton) peel flour as binder in frankfurter-type sausage
Provedor de dados: 109
Autores: Rosero-Chasoy,Gilver; Serna-Cock,Liliana.
Abstract Agroindustrial residues such as plantain (Musa paradisiaca L. cv. Dominico Harton) peel have functional properties, which made them suitable for use as a food ingredient. The aim of this research was to evaluate plantain peel flour (PPF) as a binder in the production of frankfurter- type sausage. Five formulations were prepared in which wheat flour (WF) was replaced by PPF as follows: 25%, 50%, 70% and 100%, respectively. Once the sausages are obtained, water retention capacity (WRC), emulsifying stability (ES), and pH, were evaluated. When comparing treatments with the control sample, it was found that replacing up to 50% of WF by PPF, significantly increased WRC by 7.5%. When replacing 25%, Es, there were no statistically significant changes...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Agroindustrial residues; Meat emulsion; Physicochemical properties.
Ano: 2017
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122017000300305

Infusão intramamária de Weissella confusa afeta a contagem de células somáticas e a contagem diferencial de leucócitos no leite
Provedor de dados: 65
Autores: Enríquez-Valencia,Cruz Elena; Serna-Cock,Liliana; Campos-Gaona,Rómulo.
A utilização de bactérias do ácido láctico (LAB) como uma alternativa ao uso de antimicrobianos tem sido proposta para o controle da mastite bovina. No entanto, antes dessas aplicações, o efeito in vivo das LAB sobre a glândula deve ser cuidadosamente avaliado. O objetivo deste estudo foi determinar se a infusão intramamária de Weissella confusa e seus metabólitos em vacas afeta a contagem de células somáticas (CCS) e a contagem diferencial de leucócitos no leite. Vinte e quatro tetos de seis vacas Hartón del Valle foram selecionados para a pesquisa. Uma alíquota de 5mL de uma solução aquosa de células de W. confusa (W) (concentração 109u.f.c. mL-1), 5mL de células de W. confusa com seus metabólitos (W + W10b) ou 5mL de metabólitos (W10b) foi aplicada ao...
Tipo: Info:eu-repo/semantics/article
Palavras-chave: Bactérias lácticas; Leucócitos; Mastite.
Ano: 2015
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782015000500835