sulfuric acid/بطاطس

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15 النتائج

Reversible thermal transition of soluble branched chains from slightly acid-treated potato starch.

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The reversible thermal transition of soluble branched starch chains prepared from slightly acid-treated potato starch granules (ATS) was investigated. Potato starch was immersed in 15% sulfuric acid to obtain ATS with a 1% hydrolysis rate. About half of the molecules of ATS, which spontaneously

High-performance thin-layer chromatographic determination of potato glycoalkaloids.

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A high-performance thin-layer chromatographic (HPTLC) method for the determination of the two main potato glycoalkaloids, alpha-chaconine and alpha-solanine, in different parts of the potato plant, is described. Samples were extracted with diluted aqueous acetic acid containing the ion-pairing

Sambutoxin, a new mycotoxin produced by toxic Fusarium isolates obtained from rotted potato tubers.

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Ninety-nine isolates of Fusarium species were obtained from rotted potato tubers from various parts of Korea. Of these isolates, 80 were identified as Fusarium oxysporum, F. solani, or F. sambucinum. The isolates of these species were grown on autoclaved wheat grains and examined for toxicity in a

Preparation and characterization of potato starch nanocrystal reinforced natural rubber nanocomposites.

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Potato starch nanocrystals were found to serve as an effective reinforcing agent for natural rubber (NR). Starch nanocrystals were obtained by the sulfuric acid hydrolysis of potato starch granules. After mixing the latex and the starch nanocrystals, the resulting aqueous suspension was cast into

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,

Biogas production from potato-juice, a by-product from potato-starch processing, in upflow anaerobic sludge blanket (UASB) and expanded granular sludge bed (EGSB) reactors.

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In this study, the utilization of potato-juice, the organic by-product from potato-starch processing, for biogas production was investigated in batch assay and in high rate anaerobic reactors. The maximum methane potential of the potato-juice determined by batch assay was 470 mL-CH(4)/gVS-added.

Regulatory effect of amino acids on the pasting behavior of potato starch is attributable to its binding to the starch chain.

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The binding of an amino acid, glycine (Gly), alanine (Ala), epsilon-aminocaproic acid (-AC), monosodium glutamate (GluNa), or lysine (Lys), to starch was examined by a biomolecular interaction analyzer (IAsys). A starch sample (ATS) hydrolyzed to an extent of 1% hydrolysis rate with 15% sulfuric

Molecular fractionation of starch by density-gradient ultracentrifugation.

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Amylose and amylopectin in corn and potato starches were fractionated by centrifugation at 124,000g for 3-72 h at 40 degrees C in a gradient media, Nycodenz, based on their sedimentation rate differences. The fractions were collected from a centrifuge tube, and then analyzed by the phenol-sulfuric

A quantitative analysis of total carbohydrate content from the salivary expectorants in young children.

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UNASSIGNED In this postfluoride era, the concentration of fermentable carbohydrate in saliva after food intake is important to determine the risk of developing dental caries. UNASSIGNED The aim of this study is to estimate the total carbohydrate content of salivary expectorants following consumption

First Report of Leaf Spot caused by Bipolaris oryzae on Switchgrass in Tennessee.

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Knowledge of pathogens in switchgrass, a potential biofuels crop, is limited. In December 2007, dark brown to black irregularly shaped foliar spots were observed on 'Alamo' switchgrass (Panicum virgatum L.) on the campus of the University of Tennessee. Symptomatic leaf samples were

First Report of Leaf Spot on Switchgrass Caused by Pithomyces chartarum in the United States.

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There are few reports on diseases of switchgrass. In November 2009, light brown to white bleached spots (1 to 2 × 3 to 4 μm) were observed on 'Alamo' switchgrass (Panicum virgatum L.) grown in a growth chamber in Knoxville, TN, from surface-disinfested seed produced in Colorado. Symptomatic leaf

Optimization of bioactive preservative coatings of starch nanocrystal and ultrasonic extract of sour lemon peel on chicken fillets.

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Starch nanocrystal (S-NC) was produced after sulfuric acid hydrolysis of potato starch granules and then characterized by laser diffraction particle size analyzer, scanning electron microscopy (SEM) and X-ray diffraction (XRD). Response surface methodology (RSM) was applied to optimize S-NC (2-10%)

Sulfate metabolism. I. Sulfate uptake and redistribution of acid rain sulfate by edible plants.

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Sulfur is the major component of polluted air in industrialized societies. Atmospheric sulfur is converted to sulfuric acid through a series of chemical reactions which can eventually reenter many ecosystems. When edible plants are grown in soils containing varying amounts of sulfate, the roots take

Production of cyclodextrin glycosyltransferase by immobilized Bacillus sp. on chitosan matrix.

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The whole-cell immobilization on chitosan matrix was evaluated. Bacillus sp., as producer of CGTase, was grown in solid-state and batch cultivation using three types of starches (cassava, potato and cornstarch). Biomass growth and substrate consumption were assessed by flow cytometry and modified

Bioleaching of heavy metals from a low-grade mining ore using Aspergillus niger.

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The main concern of this study is to develop a feasible and economical technique to microbially recover metals from oxide low-grade ores. Owing to the significant quantities of metals that are embodied in low-grade ores and mining residues, these are potential viable sources of metals. In addition,

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