Results: 9

Development of a new protocol for freeze-drying preservation of Pseudoalteromonas nigrifaciens and its protective effect on other marine bacteria

Background: Freeze-drying is known as one of the best methods to preserve bacterial strains. Protectant is the key factor affecting the survival rate of freeze-dried strains. In addition, salinity, bacterial suspension concentration, drying time, and other factors can also affect the survival rate of str...

Desenvolvimento e avaliação de nova preparação de anfotericina B e/ou cetoconazol em dispersão de bixina, pullulan e trealose

Muitos pacientes acometidos por infecções fúngicas sucumbem devido a não eficácia dos antibióticos ou por toxicidade dos mesmos. Anfotericina B é um dos antifúngicos mais eficientes do mercado apesar de sua alta toxicidade, tem estrutura poliênica e é um composto insolúvel em água, sendo nece...

The secreted acid trehalase encoded by the CgATH1 gene is involved in Candida glabrata virulence

Mem. Inst. Oswaldo Cruz; 115 (), 2020
BACKGROUND Candida glabrata yeast is the second cause of candidiasis worldwide. Differs from other yeasts since assimilates only glucose and trehalose (a characteristic used in rapid identification tests for this pathogen) by secreting into the medium a highly active acid trehalase encoded by the CgATH1 ...

Adaptive evolution and selection of stress-resistant Saccharomyces cerevisiae for very high-gravity bioethanol fermentation

Background: In industrial yeasts, selection and breeding for resistance to multiple stresses is a focus of current research. The objective of this study was to investigate the tolerance to multiple stresses of Saccharomyces cerevisiae obtained through an adaptive laboratory evolution strategy involving a...

Effect of the bioprotectant agent trehalose on corneal epithelial healing after corneal cross-linking for keratoconus

Arq. bras. oftalmol; 81 (6), 2018
ABSTRACT Purpose: This study aimed to compare the effectiveness of eye drops containing a combination of sodium hyaluronate and trehalose and sodium hyaluronate for the treatment of corneal cross-linking and epithelial healing. Methods: This study included 46 eyes of 23 keratoconus patients who underwe...

First report of the production of a potent biosurfactant with α, β-trehalose by Fusarium fujikuroi under optimized conditions of submerged fermentation

Braz. j. microbiol; 49 (supl.1), 2018
Abstract Biosurfactants have many advantages over synthetic surfactants but have higher production costs. Identifying microorganisms with high production capacities for these molecules and optimizing their growth conditions can reduce cost. The present work aimed to isolate and identify a fungus with hig...

Criopreservación de células estromales derivadas del tejido adiposo: comparación de diferentes medios de criopreservación

Rev. chil. cir; 68 (4), 2016
Objetivo Obtener células estromales derivadas del tejido adiposo, medir y comparar las tasas de viabilidad antes e inmediatamente después un ciclo de criopreservación con diferentes combinaciones de criopreservantes de manera de obtener el mejor medio de criopreservación. Material y método Medición...

Sugars in ferns and lycophytes growing on rocky outcrops from southeastern brazilian coast

Biosci. j. (Online); 30 (6), 2014
The extreme conditions in rocky outcrops allow the occurrence of desiccation tolerant species. One strategy of these plants to withstand water shortage is the accumulation of sugars. In this paper, we report sugar levels and profile of three ferns and one lycophyte naturally hydrated growing on rocky out...

Curso internacional de entrenamiento de post-grado en Bioquínmica y toxicología de insectos

Resume los contenidos de un cursos teórico-práctico dictado en la ciudad de Buenos Aires, sobre diversos aspectos de la bioquímica y toxicología de insectos: mecanismos hormonales, hormonas juveniles y ecdisona; metabolismo de lípidos y transporte de ecdisona en el Triatoma infestans; acción de ins...