Untersuchungen an Kartoffelpülpe als Ballaststoffquelle. Die Zusammensetzung der Kartoffelpülpe nach Einwirkung von Pektinasen und Cellulasen sowie enzymatischem Stärkeabbau

Dongowski, G.; Stoof, Gisela

doi:10.1002/star.19930450610

Cited by 6 publications

References 11 publications

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Methods for the preparation of cell walls from potatoes

et al. 2002

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A group of new methods is described for preparing cell walls from potatoes and processed potato products. Starting from raw domestic potatoes, starch is degraded enzymatically after a very brief 100°C gelatinisation step conducted after homogenisation to minimise the time required for heat transfer. Protein is removed by detergent and phenol extraction. This procedure (method 1) gave cell wall preparations containing <5% starch, with minimal degradation of wall polysaccharides. It did not, however, remove starch ef®ciently from industrial potatoes in which the starch content is much higher. A different procedure, method 2, was used in this case. In method 2 a 20 min starch gelatinisation step was used but the temperature was restricted to 70°C and the pH to 4.0, with the aim of protecting pectins from depolymerisation. Method 2 and method 1A, which is a hybrid procedure involving the starch gelatinisation step from method 2 and other steps from method 1, gave low-starch cell walls from industrial as well as domestic potatoes. These methods are suitable for a range of potato types and potato products and are either more ef®cient or more convenient than previous procedures for cell wall isolation.

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Methods for the preparation of cell walls from potatoes

et al. 2002

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Lactic Acid Fermentation of Potato Pulp by the Fungus Rhizopus oryzae

Oda

Saito

Yamauchi

et al. 2002

Current Microbiology

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Thirty-eight strains of the fungus Rhizopus oryzae were grown on potato pulp, an agricultural by-product of the starch industry. Either lactic acid or fumaric acid and ethanol were formed, and the ratio differed among the strains tested. The highest amount of L(+)-lactic acid (10 mg/g fresh matter) was observed in the pulp fermented for six days by Rhizopus oryzae IFO 4707. The IFO 4707 strain rapidly reduced the hardness and pH of potato pulp within one day followed by the gradual synthesis of lactic acid. A composition analysis showed that the enzymes secreted from the fungal cells hydrolyzed starch efficiently with partial degradation of the cell wall. Rhizopus oryzae may be used as an inoculant for ensiling potato pulp and other agricultural by-products containing starch.

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Enzymatic conversions of starch

Tomasik

Horton

2012

Advances in Carbohydrate Chemistry and Biochemistry

117

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This article surveys methods for the enzymatic conversion of starch, involving hydrolases and nonhydrolyzing enzymes, as well as the role of microorganisms producing such enzymes. The sources of the most common enzymes are listed. These starch conversions are also presented in relation to their applications in the food, pharmaceutical, pulp, textile, and other branches of industry. Some sections are devoted to the fermentation of starch to ethanol and other products, and to the production of cyclodextrins, along with the properties of these products. Light is also shed on the enzymes involved in the digestion of starch in human and animal organisms. Enzymatic processes acting on starch are useful in structural studies of the substrates and in understanding the characteristics of digesting enzymes. One section presents the application of enzymes to these problems. The information that is included covers the period from the early 19th century up to 2009.

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Untersuchungen an Kartoffelpülpe als Ballaststoffquelle. Die Zusammensetzung der Kartoffelpülpe nach Einwirkung von Pektinasen und Cellulasen sowie enzymatischem Stärkeabbau

Abstract: starchktarke 45 (1993) Nr. 6. S. 234-238

Cited by 6 publications

References 11 publications

Methods for the preparation of cell walls from potatoes

Methods for the preparation of cell walls from potatoes

Lactic Acid Fermentation of Potato Pulp by the Fungus Rhizopus oryzae

Enzymatic conversions of starch

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