Phosphorylated Starch
Mostrando 1-12 de 26 artigos, teses e dissertações.
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1. Preparation and Physicochemical, Structural and Morphological Characterization of Phosphorylated Starch
Phosphorylation of starch has resulted in appreciated material properties for applications in drug matrices. This study aimed to obtain and characterize samples of phosphorylated starch with sodium trimetaphosphate (STMP) and sodium tripolyphosphate (STPP). SEM micrographs allowed evidence that in relation to the starch in natura, the samples showed a loss o
Mat. Res.. Publicado em: 26/06/2017
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2. Elaboração e caracterização de blendas de amido fosforilado com quitosana e PVA
The aims of this study were to produce films from phosphorylated starch/chitosan/PVA blends and evaluate their physicochemical properties. The film properties were dependent on the starch percentage in the blend. The infrared spectra of the blends showed the appearance of bands at 1716 and 1733 cm-1 (stretching C = O of PVA acetate residues) and 1556 cm-1 (a
Quím. Nova. Publicado em: 2016-05
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3. Characterization of new sources of derivative starches as wall materials of essential oil by spray drying
Starch derivatives of taro (Colocasia esculenta L. Schott) and rice were characterized as wall materials of orange oil (d-limonene) by spray drying. Native starches were initially hydrolyzed with HCl and then esterified. Succinylated starches were modified using a conventional method in a slurry and were extruded; whereas, the phosphorylated starches were mo
Food Sci. Technol. Publicado em: 2013-12
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4. DESENVOLVIMENTO DE BLENDAS DE AMIDO DE INHAME CODIFICADO COM QUITOSANA E PVA / STARCH BLENDE DEVELOPMENT OF INHAME CODIFIED WITH QUITOSANA AND PVA
Os objetivos deste trabalho foram: modificar quimicamente o amido de inhame (Dioscorea esculenta L.) por oxidaÃÃo e fosforizaÃÃo, elaborar blendas com quitosana (CH) e poli (alcool vinilico) (PVA) e avaliar suas caracterÃsticas fÃsico-quÃmicas e funcionais. O amido oxidado (AOX) obtido com um alto grau de substituiÃÃo (GS= 1,86) promoveu grandes mod
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/10/2010
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5. Modificação química e física do amido de quirera de arroz para aproveitamento na indústria de alimentos
The study evaluated the efficiency of chemical (phosphorylation) and physical (extrusion) modifications of the starch of broken rice. Results demonstrated a reduction in the moisture content of extruded and phosphorylated broken rice and an increase in the ash content of phosphorylated broken rice. Both phosphorylation and extrusion increased cold water bind
Química Nova. Publicado em: 2008
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6. In Vitro Biosynthesis of Phosphorylated Starch in Intact Potato Amyloplasts1
Intact amyloplasts from potato (Solanum tuberosum L.) were used to study starch biosynthesis and phosphorylation. Assessed by the degree of intactness and by the level of cytosolic and vacuolar contamination, the best preparations were selected by searching for amyloplasts containing small starch grains. The isolated, small amyloplasts were 80% intact
American Society of Plant Physiologists.
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7. Protein Phosphorylation in Amyloplasts Regulates Starch Branching Enzyme Activity and Protein–Protein Interactions
Protein phosphorylation in amyloplasts and chloroplasts of Triticum aestivum (wheat) was investigated after the incubation of intact plastids with γ-32P-ATP. Among the soluble phosphoproteins detected in plastids, three forms of starch branching enzyme (SBE) were phosphorylated in amyloplasts (SBEI, SBEIIa, and SBEIIb), and both forms of SBE in chloroplasts
American Society of Plant Biologists.
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8. Phosphorylated α(1→4)Glucans as Substrate for Potato Starch-Branching Enzyme I1
The possible involvement of potato (Solanum tuberosum L.) starch-branching enzyme I (PSBE-I) in the in vivo synthesis of phosphorylated amylopectin was investigated in in vitro experiments with isolated PSBE-I using 33P-labeled phosphorylated and 3H end-labeled nonphosphorylated α(1→4)glucans as the substrates. From these radiolabeled substrates PSB
American Society of Plant Physiologists.
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9. Physiological Rates of Starch Breakdown in Isolated Intact Spinach Chloroplasts 1
Starch breakdown with rates above 10 μatom carbon per mg chlorophyll per hour has been monitored in spinach chloroplasts and compares favorably with the rates in whole leaves. Intact starch-loaded chloroplasts were prepared from protoplasts to avoid rupture during mechanical homogenization and rapid centrifugation. Particular attention was paid to the ident
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10. Identification of a Novel Enzyme Required for Starch Metabolism in Arabidopsis Leaves. The Phosphoglucan, Water Dikinase1[w]
The phosphorylation of amylopectin by the glucan, water dikinase (GWD; EC 2.7.9.4) is an essential step within starch metabolism. This is indicated by the starch excess phenotype of GWD-deficient plants, such as the sex1-3 mutant of Arabidopsis (Arabidopsis thaliana). To identify starch-related enzymes that rely on glucan-bound phosphate, we studied the bind
American Society of Plant Biologists.
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11. Starch Phosphorylation in Potato Tubers Proceeds Concurrently with de Novo Biosynthesis of Starch.
The in vivo phosphorylation of starch was studied in Solanum tuberosum cv Dianella and Posmo. Small starch granules contain 25% more ester-bound phosphate per glucose residue than large starch granules. The degree of phosphorylation was found to be almost constant during tuber development. Isolated tuber discs synthesize starch from externally supplied gluco
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12. Phosphorylation of Transitory Starch Is Increased during Degradation1[w]
The starch excess phenotype of Arabidopsis mutants defective in the starch phosphorylating enzyme glucan, water dikinase (EC 2.7.9.4) indicates that phosphorylation of starch is required for its degradation. However, the underlying mechanism has not yet been elucidated. In this study, two in vivo systems have been established that allow the analysis of phosp
American Society of Plant Biologists.