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Characterization of potato leaf starch.

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The starch accumulation-degradation process as well as the structure of leaf starch are not completely understood. To study this, starch was isolated from potato leaves collected in the early morning and late afternoon in July and August, representing different starch accumulation rates. The starch

The effect of structural properties on rheological behaviour of starches in binary dimethyl sulfoxide-water solutions.

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This research study analysed the rheological properties of potato amylose and potato amylopectin in binary solutions of the following water and dimethyl sulfoxide concentrations: 90% DMSO (1), 80% DMSO (2) and 50% DMSO (3), with preparation methodology involving the dissolution at the temperature of

Molecular characteristics of amylose and starch in dimethyl sulfoxide.

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The aim of this work was the molecular characterization of starch polysaccharides to determine solution structure. Studies of amylose and potato starches of different origins were carried out by the static light scattering, dynamic light scattering, and HPSEC-MALLS methods. Molecular parameters such

Effects of different treatment methods on properties of potato starch-lauric acid complex and potato starch-based films.

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The effects of different treatment methods on the physicochemical properties of potato starch (PS) and PS-based films were studied. The complexing indices of PS-lauric acid (LA) complexes followed the order: pullulanase debranching (PD) > ultrasound treatment (UT) > dimethyl sulfoxide heating (DSH)

Development and evaluation of methods for starch dissolution using asymmetrical flow field-flow fractionation. Part II: Dissolution of amylose.

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In this paper, we investigate whether dissolution in water under autoclaving conditions (140 °C, 20 min) or in dimethyl sulfoxide, DMSO (100 °C, 1 h), is preferable for characterization of amylose. Two types of amylose, potato and maize, were dissolved either in water using an autoclave or in DMSO.

Evaluation of Microsporum canis in different methods of storage.

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The main objective of this investigation was to evaluate different methods of storage for Microsporum canis based on materials and equipment that are readily available in developing countries. We tested 32 strains of M. canis at - 20 degrees C in potato dextrose agar (PDA) in its plain condition, or

11beta-Hydroxylation of Cortexolone (Reichstein Compound S) to Hydrocortisone by Curvularia lunata Entrapped in Photo-Cross-Linked Resin Gels.

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Spores of Curvularia lunata were immobilized by entrapment with photo-cross-linkable resin prepolymers and incubated to form mycelium in potato dextrose broth containing cortexolone (Reichstein compound S) as an inducer of steroid 11beta-hydroxylase. In a buffer system containing 2.5% dimethyl

Antimutagenicity of sweetpotato (Ipomoea batatas) roots.

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Antimutagenicity of the water extracts prepared from the storage roots of four varieties of sweetpotato with different flesh colors was investigated using Salmonella typhimurium TA 98. The extract from the whole roots of the purple-colored Ayamurasaki variety effectively decreased the reverse

Cryopreservation at -20 and -70 °C of Pleurotus ostreatus on Grains.

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Alternative substrates for cryopreservation at -20 °C have been little explored for basidiomycetes and could bring new possibilities of lower cost cryopreservation. Nevertheless, freezing temperatures between -15 and -60 °C are very challenging because they frequently result in cryoinjuries. The

Preparation of starch and other carbon fractions from higher plant leaves for stable carbon isotope analysis.

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The measurement of the carbon isotope composition of starch and cellulose still relies on chemical isolation of these water-insoluble plant constituents and subsequent elemental analysis by isotope ratio mass spectrometry (EA/IRMS) of the purified fractions, while delta(13)C values of

Establishment of Residue Analysis of Propanil (Dichloropropionanilide), Linuron and Diphenamide in Agricultural Commodities.

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A method for simultaneous determination of residues of three herbicides containing nitrogen, propanil (3',4'-dichloropropionanilide), linuron and diphenamide, in agricultural commodites was established. The herbicides were extracted by acetone from samples, transferred into dichloromethane, then the

Optimization of large-ring cyclodextrin production from starch by amylomaltase from Corynebacterium glutamicum and effect of organic solvent on product size.

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OBJECTIVE To increase yield of starch conversion to large-ring cyclodextrins (LR-CDs) by amylomaltase from Corynebacterium glutamicum (CgAM). RESULTS In this work, LR-CDs produced from pea, tapioca, corn, potato, rice and glutinous-rice starch by the recombinant CgAM were analysed by

Surface partitioning studies of N-methylcarbamate-treated post-harvest crops using SFE-HPLC-postcolumn reaction-fluorescence.

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The partitioning characteristics of selected carbamate insecticides (carbaryl, aldicarb, bendiocarb and pirimicarb) on five fruit and vegetable types were investigated. Post-harvest samples were surface-saturated with a methanolic-aqueous mixed carbamate spiking solution for a number of time

A quantitative structure-antifungal activity relationship study of oxygenated aromatic essential oil compounds using data structuring and PLS regression analysis.

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Twenty two oxygenated aromatic essential oil compounds were chosen for the study of the antifungal activity against two wood-decaying fungi, the white-rot Trametes versicolor, which mainly metabolizes lignin, and the brown-rot Coniophoha puteana, which digests cellulose in plant cell walls. Minimal

Production of cercosporin toxin by the phytopathogenic Cercospora fungi is affected by diverse environmental signals.

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Cercosporin is a polyketide phytotoxin produced by many phytopathogenic Cercospora spp. We investigated environmental signals that have elaborate control of cercosporin production. Light is the most critical factor for cercosporin production. Cercospora nicotianae accumulated substantial quantities

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