27
views
0
recommends
+1 Recommend
1 collections
    0
    shares
      • Record: found
      • Abstract: found
      • Article: found
      Is Open Access

      Evaluación de residuos de cáscaras de papa como sustrato para la producción de amilasas a partir de Bacillus amyloliquefaciens A16 Translated title: Evaluation of potato peel wastes to produce amylases from Bacillus amyloliquefaciens A16

      research-article

      Read this article at

      Bookmark
          There is no author summary for this article yet. Authors can add summaries to their articles on ScienceOpen to make them more accessible to a non-specialist audience.

          Abstract

          Resumen Los residuos agroindustriales de bajo costo, fácil acceso y contenido considerable de almidón pueden aprovecharse como sustratos para la producción de amilasas. En el presente estudio se evaluó la producción de amilasas con la cepa Bacillus amyloliquefaciens (aislamiento A16) en medios de cultivo ajustados a diferentes pH y preparados a partir de cáscaras de papa con 1,30 % de partes por volumen (p/v) de almidón. Los medios fueron incubados durante 36 horas a 37 °C y se tomaron muestras cada 12 horas para cuantificar mediante espectrofotometría el almidón residual revelándolo con solución de Lugol para obtener extractos enzimáticos crudos en los que se determinó la actividad amilolítica. La actividad de las amilasas producidas en sustratos preparados con cáscaras de papa se compararon con las actividades amilolíticas producidas en caldo de almidón al 1 %, sustrato que sirvió de control positivo. La mayor actividad de las amilasas producidas en medios con cáscaras de papa fue de 44,2 U/mL a las 36 horas de fermentación a un pH de 5,0, en tanto que la actividad enzimática en caldo de almidón al 1 % fue de 64,8 U/mL.

          Translated abstract

          Abstract Agroindustrial wastes can be suitable as substrates for amylases production given their low cost, availability, and significant concentration of starch. In the present study, we evaluated the production of amylases from the Bacillus amyloliquefaciens A16 strain in culture media adjusted to different pH and prepared from potato peels with 1.30 % w/v of starch. The media were incubated for 36 hours at 37°C and samples were taken every 12 h to quantify by spectrophotometry the residual starch using Lugol's solution for revelation to obtain crude enzyme extracts whose amylolytic activity was determined. The amylase activity produced in substrates prepared from potato peels were compared with that produced in 1 % starch broth used as a positive control. The highest amylase activity in potato peels media was 44.2 U /mL after 36 h of fermentation at 5.0 pH while the enzyme activity in 1% starch broth was 64.8 U/mL.

          Related collections

          Most cited references31

          • Record: found
          • Abstract: found
          • Article: found
          Is Open Access

          Potential and utilization of thermophiles and thermostable enzymes in biorefining

          In today's world, there is an increasing trend towards the use of renewable, cheap and readily available biomass in the production of a wide variety of fine and bulk chemicals in different biorefineries. Biorefineries utilize the activities of microbial cells and their enzymes to convert biomass into target products. Many of these processes require enzymes which are operationally stable at high temperature thus allowing e.g. easy mixing, better substrate solubility, high mass transfer rate, and lowered risk of contamination. Thermophiles have often been proposed as sources of industrially relevant thermostable enzymes. Here we discuss existing and potential applications of thermophiles and thermostable enzymes with focus on conversion of carbohydrate containing raw materials. Their importance in biorefineries is explained using examples of lignocellulose and starch conversions to desired products. Strategies that enhance thermostablity of enzymes both in vivo and in vitro are also assessed. Moreover, this review deals with efforts made on developing vectors for expressing recombinant enzymes in thermophilic hosts.
            Bookmark
            • Record: found
            • Abstract: not found
            • Article: not found
            Is Open Access

            Understanding Starch Structure: Recent Progress

              Bookmark
              • Record: found
              • Abstract: found
              • Article: not found

              Starch Structure Influences Its Digestibility: A Review.

              Twenty-five years ago, it was found that a significant fraction of the starch present in foods is not digested in the small intestine and continues to the large intestine, where it is fermented by the microbiota; this fraction was named resistant starch (RS). It was also reported that there is a fraction of starch that is slowly digested, sustaining a release of glucose in the small intestine. Later, health benefits were found to be associated with the consumption of this fraction, called slowly digestible starch (SDS). The authors declare both fractions to be "nutraceutical starch." An overview of the structure of both fractions (RS and SDS), as well as their nutraceutical characteristics, is presented with the objective of suggesting methods and processes that will increase both fractions in starchy foods and prevent diseases that are associated with the consumption of glycemic carbohydrates.
                Bookmark

                Author and article information

                Journal
                racefn
                Revista de la Academia Colombiana de Ciencias Exactas, Físicas y Naturales
                Rev. acad. colomb. cienc. exact. fis. nat.
                Academia Colombiana de Ciencias Exactas, Físicas y Naturales (Bogotá, Distrito Capital, Colombia )
                0370-3908
                September 2020
                : 44
                : 172
                : 794-804
                Affiliations
                [1] Bogotá Arauca orgnameUniversidad Nacional de Colombia orgdiv1Centro de Gestión Industrial Colombia
                Article
                S0370-39082020000300794 S0370-3908(20)04417200794
                10.18257/raccefyn.1122
                0d388b41-1434-46f7-a02b-3915b745f57e

                This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

                History
                : 09 December 2019
                : 17 February 2020
                Page count
                Figures: 0, Tables: 0, Equations: 0, References: 31, Pages: 11
                Product

                SciELO Colombia

                Categories
                Ciencias químicas

                Agroindustrial wastes,Enzyme activity,Amylolytic activity,Bacillus amyloliquefaciens,Starch,Potato peels,Actividad enzimática,Actividad amilolítica,Almidón,Residuos agroindustriales,Cáscaras de papa

                Comments

                Comment on this article