X-ray analysis of different starch granules

Singh, V. S.; Urs, Raksha; Somashekarappa, H.; Ali, S. Zakiuddin; Somashekar, R.

doi:10.1007/bf02744840

Cited by 7 publications

(8 citation statements)

References 20 publications

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“…Briefly from XRD spectra, starches can be classified as A, B, and C types. 42 A-type starch has strong diffraction peaks at about 15 and 23°and an unresolved doublet at around 17 and 18°. B-type starch gives characteristic peak at 5.6°and a strong diffraction peak at 17.7°along with a few less intense peaks at 15, 20, 22, and 24°.…”

Section: Resultsmentioning

confidence: 99%

“…As inferred from Figure c, there is no significant change in the diffractograms of the two samples; however, the results suggest only a decrease in peak intensity after cross-linking the potato starch. Briefly from XRD spectra, starches can be classified as A, B, and C types . A-type starch has strong diffraction peaks at about 15 and 23° and an unresolved doublet at around 17 and 18°.…”

Section: Results and Discussionmentioning

confidence: 99%

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Enhanced and Selective Adsorption of Zn(II), Pb(II), Cd(II), and Hg(II) Ions by a Dumbbell- and Flower-Shaped Potato Starch Phosphate Polymer: A Combined Experimental and DFT Calculation Study

et al. 2020

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Microwave−ultrasound-assisted facile synthesis of a dumbbell-and flowershaped potato starch phosphate (PSP) polymer, hereafter PSP, was carried out by crosslinking the hydroxyl groups of native potato starch (NPS) using phosphoryl chloride as a cross-linking agent. Structural and morphological analysis manifested the successful formation of the dumbbell-and flower-shaped PSP biosorbent with enhanced specific surface area and thermal stability. Viscoelastic behavior of NPS and PSP suggested increased rigidity in PSP, which helped the material to store more deformation energy in an elastic manner. The synthesized PSP biosorbent material was successfully tested for efficient and quick uptake of Zn(II), Pb(II), Cd(II), and Hg(II) ions from aqueous medium under competitive and noncompetitive batch conditions with q m values of 130.54, 106.25, 91.84, and 51.38 mg g −1 , respectively. The adsorption selectivity was in consonance with Pearson's hard and soft acids and bases (HSAB) theory in addition to their order of hydrated radius. Adsorption of Zn(II), Pb(II), Cd(II), and Hg(II) followed a second-order kinetics and the adsorption data fitted well with the Langmuir isotherm model. Quantum computations using density functional theory (DFT) further supported the experimental adsorption selectivity, Zn(II) > Pb(II) > Cd(II) > Hg(II), in terms of metal−oxygen binding energy measurements. What was more intriguing about PSP was its reusability over multiple adsorption cycles by treating the metal(II)-complexed PSP with 0.1 M HCl without any appreciable loss of its adsorption capacity.

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Section: Resultsmentioning

confidence: 99%

Section: Results and Discussionmentioning

confidence: 99%

Enhanced and Selective Adsorption of Zn(II), Pb(II), Cd(II), and Hg(II) Ions by a Dumbbell- and Flower-Shaped Potato Starch Phosphate Polymer: A Combined Experimental and DFT Calculation Study

et al. 2020

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“…[45] Crystalline natures of starches play a dominant role in determining swelling and enzymic behavior of starches. [46] The level of crystallinity and morphology significantly affects the properties of polymers. Polymers with high crystallinity have a higher glass transition temperature and have usually superior properties.…”

Section: Crystallinity Of Oat Starchmentioning

confidence: 99%

Isolation and Physico‐chemical Characterization of Triticum Decocum Starch

2021

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Ethiopian oat (Triticum decocum) starch has been isolated and examined for its chemical composition and physicochemical properties. The proximate composition of the starch on a dry weight basis is found to be 0.23% ash, 0.26% protein, 1.54% fat, and 56.31% starch. The total amylose content is 28.4% with 20.11% apparent amylose and 29.19% lipid complexed amylose. SEM showed oval, spherical shaped granules. The particle size distributions of the starch showed monomodal normal particle size distribution with the average volumetric particle diameters being about 23.03 µm, and specific surface area 0.7186 m2 g−1. XRD showed a pattern that is typical of A‐type with a distinctive maximum peak at around 17° 2θ. At all relative humidities, its water sorption properties resemble that of maize starch. It has unique swelling power and solubility in water at different temperatures. Viscosity curves of 10% of starch paste showed a peak viscosity of 1926cP. Its cold paste viscosity and hot paste viscosity are 4236 and 1720 cP, respectively. The breakdown and set back viscosities of Ethiopian oat starch are 206 and 2647cP, respectively. The FTIR showed the characteristic features of prominent starch peaks. Physicochemical characteristics of the oat starch have shown that it has similar properties with maize starch which could make it fit for use in food and pharmaceutical industries, especially in the area where oat is produced as endogenous crop like in Ethiopia.

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“…Joshi and Purnima [18] studied the mechanical properties and morphology of glass fiber, CaSiO 3 -reinforced PP hybrid composite, the results showed that the tensile, flexural, and impact properties of the composite were higher than those of the unfilled PP. Singh and his colleagues [19] evaluated the mechanical properties of polypropylene filled with CaSiO 3 and silicon rubber, and found that the notched impact strength, and flexural strength were enhanced, but the unnotched impact strength, tensile strength and flexural modulus were reduced.…”

Section: Introductionmentioning

confidence: 99%

Impact and flexural properties of PP/CaSiO₃ composites

Liang

2016

Polymer Composites

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The effects of filler surface treatment and content on the impact fracture toughness and flexural properties of polypropylene (PP) composites filled with wollastonite (CaSiO 3 ) were investigated. The results showed that the introduction of the filler could toughen and reinforce the PP; the influences of the filler surface treatment on the toughness and strength were significant; the values of the Izod V-notched impact strength and the Charpy V-notched impact strength of the composites increased with increasing the filler weight fractions; the values of flexural modulus increased with increasing the filler weight fractions; the flexural strength increased when the filler weight fraction was lower than 10% and then varied slightly. This toughening effect should be attributed to the stress concentration because of strip shape of the filler and to block the development of the notched cracks in the matrix, improving the notched sensitivity to the impact fracture of the PP composites. This study should be helpful to understand the mechanisms of CaSiO 3 reinforcing and toughening PP resin. POLYM. COMPOS., 00:000-000, 2016.

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X-ray analysis of different starch granules

Cited by 7 publications

References 20 publications

Enhanced and Selective Adsorption of Zn(II), Pb(II), Cd(II), and Hg(II) Ions by a Dumbbell- and Flower-Shaped Potato Starch Phosphate Polymer: A Combined Experimental and DFT Calculation Study

Enhanced and Selective Adsorption of Zn(II), Pb(II), Cd(II), and Hg(II) Ions by a Dumbbell- and Flower-Shaped Potato Starch Phosphate Polymer: A Combined Experimental and DFT Calculation Study

Isolation and Physico‐chemical Characterization of Triticum Decocum Starch

Impact and flexural properties of PP/CaSiO₃ composites

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X-ray analysis of different starch granules

Cited by 7 publications

References 20 publications

Enhanced and Selective Adsorption of Zn(II), Pb(II), Cd(II), and Hg(II) Ions by a Dumbbell- and Flower-Shaped Potato Starch Phosphate Polymer: A Combined Experimental and DFT Calculation Study

Enhanced and Selective Adsorption of Zn(II), Pb(II), Cd(II), and Hg(II) Ions by a Dumbbell- and Flower-Shaped Potato Starch Phosphate Polymer: A Combined Experimental and DFT Calculation Study

Isolation and Physico‐chemical Characterization of Triticum Decocum Starch

Impact and flexural properties of PP/CaSiO3 composites

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Product

Resources

About

Impact and flexural properties of PP/CaSiO₃ composites