Characterization of pectinase activity for enology from yeasts occurring in Argentine Bonarda grape

Characterization of pectinase activity for enology from yeasts occurring in Argentine Bonarda grape

Pectinolytic enzymes are greatly important in winemaking due to their ability to degrade pectic polymers from grape, contributing to enhance process efficiency and wine quality. This study aimed to analyze the occurrence of pectinolytic yeasts during spontaneous fermentation of Argentine Bonarda grape, to select yeasts that produce extracellular pectinases and to characterize their pectinolytic...

Yeasts Occurring on Grapes and in Grape Products in California.

Pectinase Activity of some Micromycetes Isolated from Agricultural Soils

Pectinases have multiple nature and various forms which are necessary for the hydrolysis of pectin in several conventional industrial and natural processes. In this investigation fourteen fungal strains which isolated from agricultural soils ,were screened for pectinase activity. Pectinase activity were measured in vitro by assaying released reducing sugar from pectin as sole carbon source. Asp...

Yeasts Occurring on Dates.

Dates sometimes undergo a yeast fermentation even though they appear to be sufficiently low in moisture and high in sugar content to inhibit the development of most spoilage organisms. In the packing of dates the procedures followed, as outlined by Sievers and Barger (1930) do not involve the use of preservatives or of sufficient heat to prevent yeast growth. In fact, yeast spoilage has been ob...

Production kinetics and characterization of pectinase enzyme from Aspergillus niger

Food grade pectinases from Aspergillus niger are predominantly used as processing aids in industries. In the present investigation, efforts towards standardization for pilot scale production of pectinase enzyme from A. niger were made. The crude enzyme was studied for its kinetics to optimize substrate concentration and processing parameters on the basis of polygalacturonic activity. Km (Michae...