malic acid/potatis

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L-malic acid biosensor for field-based evaluation of apple, potato and tomato horticultural produce.

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A screen-printed three-electrode amperometric biosensor incorporating malic enzyme for the measurement of L-malic acid in apple, potato and tomato horticultural samples has been developed. The working electrode contained 0.38 mU of immobilised enzyme and was fabricated using rhodinised carbon to

Biodegradation of potato slops from a rural distillery by thermophilic aerobic bacteria.

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A study has been made of thermophilic aerobic biodegradation of the liquid fraction of potato slops (distillation residue) from a rural distillery. The COD of this fraction ranged from 49 to 104 g O2/l, the main contributions to the COD coming from organic acids, reducing substances, and glycerol.

Structure and Physicochemical Properties of Malate Starches from Corn, Potato, and Wrinkled Pea Starches.

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In this study, corn, potato, and wrinkled pea starches were esterified with malic acid under high temperatures for different lengths of time. The degree of substitution (DS), granule morphology, crystal structure, gelatinization properties, and the digestibility of the malate starch were

A survey of metabolic changes in potato leaves by NMR-based metabolic profiling in relation to resistance to late blight disease under field conditions.

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Non-targeted nuclear magnetic resonance (NMR)-based metabolic profiling was applied to potato leaves to survey metabolic changes associated with late blight resistance under field conditions. Potato plants were grown in an experimental field, and the compound leaves with no visible symptoms were

The effect of antibrowning agents on inhibition of potato browning, volatile organic compound profile, and microbial inhibition.

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Burbank and Norkotah potato slices were dipped into 3% sodium acid sulfate (SAS), citric acid (CA), sodium erythorbate (SE), malic acid (MA), sodium acid pyrophosphate (SAPP), or a combination of SAS-CA-SE. Browning by polyphenol oxidase (PPO) obtained from potato extract with 0.04 to 0.016 g/mL of

Unidirectional inhibition and activation of "malic' enzyme of Solanum tuberosum by meso-tartrate.

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A kinetic study of "malic' enzyme (EC 1.1.1.40) from potato suggests that the mechanism is Ordered Bi Ter with NADP+ binding before malate, and NADPH binding before pyruvate and HCO3-. The analysis is complicated by the non-linearity that occurs in some of the plots. meso-Tartrate is shown to

Production of poly(β-l-malic acid) by Aureobasidium pullulans HA-4D under solid-state fermentation.

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Poly(β-l-malic acid) (PMA) production by Aureobasidium pullulans HA-4D was carried out through solid-state fermentation (SSF) using agro-industrial residues. Maximum PMA production (75.4mg/g substrate) was obtained from a mixed substrate of sweet potato residue and wheat bran (1:1, w/w) supplemented

Development and validation of a liquid chromatographic method to quantify sucrose, glucose, and fructose in tubers of Solanum tuberosum Group Phureja.

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A High Performance Liquid Chromatography (HPLC) method was developed and validated to quantify sucrose (non-reducing sugar), glucose, and fructose (reducing sugars) in raw tubers of Solanum tuberosum Group Phureja. Chromatographic analysis was performed using an AMINEX HPX 87H column, at 18 °C,

Isolation and characterization of a β-propeller gene containing phosphobacterium Bacillus subtilis strain KPS-11 for growth promotion of potato (Solanum tuberosum L.).

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Phosphate-solubilizing and phytate-mineralizing bacteria collectively termed as phosphobacteria provide a sustainable approach for managing P-deficiency in agricultural soils by supplying inexpensive phosphate to plants. A phosphobacterium Bacillus subtilis strain KPS-11 (Genbank accession no.

Organic acid bioavailability from banana and sweet potato using an in vitro digestion and Caco-2 cell model.

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BACKGROUND Organic acids from plant food have been shown to play an important role in the prevention of chronic diseases (osteoporosis, obesity), inherent to western diets, but little is known about their bioavailability in the small intestine, information that needs to be determined in order to

Purification and characterization of hydroxycinnamoyl D-glucose. Quinate hydroxycinnamoyl transferase in the root of sweet potato, Ipomoea batatas Lam.

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We have previously proposed a chlorogenic acid biosynthetic pathway which involves a transesterification reaction between hydroxycinnamoyl D-glucose and D-quinic acid. The proposed pathway was based on tracer experimental results (Kojima, M., and Uritani, I. (1972) Plant Cell Physiol. 13, 311-319).

[Isolation of atmospheric-nitrogen-fixing spirilla from the waters of the Paraná delta and other rivers].

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Seventeen strains of Spirillum-like organisms (2) were isolated from the Parana Delta and other rivers (Table 1), using the following medium: 0.5% malic acid; 0.4% KOH; 0.5% K2HPO4; 0.005% yeast extract; pH was adjusted to 7 with KOH and 0.15% agar. The organisms produced a white, dense and

Effect of Acids and Sorbate Combinations on the Growth of Four Osmophilic Yeasts.

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The effects of hydrochloric, citric, lactic, phosphoric and malic acids in combination with potassium sorbate on the growth of Saccharomyces bailii , Saccharomyces acidifaciens ( Saccharomyces bailii var. osmophilus ), Saccharomyces rouxii and Saccharomyces bisporus were evaluated. Double strength

Production of hydroxycinnamoyl-shikimates and chlorogenic acid in Escherichia coli: production of hydroxycinnamic acid conjugates.

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BACKGROUND Hydroxycinnamates (HCs) are mainly produced in plants. Caffeic acid (CA), p-coumaric acid (PA), ferulic acid (FA) and sinapic acid (SA) are members of the HC family. The consumption of HC by human might prevent cardiovascular disease and some types of cancer. The solubility of HCs is

Influence of the cultivar on the organic acid and sugar composition of potatoes.

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BACKGROUND Citric, malic, tartaric, oxalic, ascorbic, aconitic and fumaric acids, and sucrose, fructose and glucose, were determined in ten potato cultivars (Azucena negra, Bonita, Bonita negra, Borralla, Colorada de baga, Mora, Negra, Palmera lagarteada, Peluca blanca and Terrenta) from the Canary

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