Multiple Bowen′s disease in chronic arsenicosis

Singha, Joydeep

doi:10.4103/2230-8598.133143

Cited by 3 publications

(3 citation statements)

References 7 publications

(5 reference statements)

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“…Also the flexibility was much higher than results in the previously reported literatures. 26,27 Especially, the elongation at break of the blends U7F3 was several times much more than the reported results.…”

Section: Mechanical Propertiescontrasting

confidence: 55%

Effect of urea and formamide plasticizers on starch/PVA bioblend sheets

Yan

Tian

Zhang

2015

J of Applied Polymer Sci

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The starch/polyvinyl alcohol (PVA) bioblend sheets containing urea and formamide as plasticizers were prepared through melt processing in presence of water. The experiments indicated that urea and formamide plasticizers could form strong hydrogen bonds with starch/PVA molecules. Urea exhibited better plasticizing effect than formamide. Urea also could greatly destroy the crystal structures of PVA component in the blends, leading to the decreased crystallinity of the blends. Formamide was a good solvent for urea and could prevent urea separating from the blends, resulting in the improved stability of plasticizing systems. The blends exhibited good flexibility. Therefore, the incorporation of both urea and formamide into starch/PVA blends could exhibit synergistic effects to ensure the blends with both good plasticizing effect and the stability of the plasticizing systems. © 2015 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2015, 132, 42311.

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Section: Mechanical Propertiescontrasting

confidence: 55%

Effect of urea and formamide plasticizers on starch/PVA bioblend sheets

Yan

Tian

Zhang

2015

J of Applied Polymer Sci

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“…Calculations were made of the free energy (ΔG ), enthalpy (ΔH ) and entropy (ΔS ) of the systems, using Eqs. (8)(9)(10): Chitosan cross-linked with glutaraldehyde 113.00 Pb 2þ [54] GLA-cross-linked metal-complexed chitosan 105.26 Pb 2þ [55] Chitosan/cotton fibers 101.53 Pb 2þ [56] Wheat bran 79.40 Pb 2þ [57] Chitosan/clay beads 72.31 Cd 2þ [58] Chitosan-alginate beads 60.27 Pb 2þ [59] Fly ash porous pellet 45.54 Pb 2þ [60] Wheat straw 41.84 Ni 2þ [61] Seed husk of Calophyllum inophyllum 34.51 Pb 2þ [62] Chitosan/glutaraldehyde 32.90 Cd 2þ [63] Hazelnut shell 28.18 Pb 2þ [64] Hyacinth roots 24.94 Pb 2þ [65] De-oiled allspice husk 20.79 Pb 2þ [66] Coal fly ash 18.98 Cd 2þ [67] Tea factory waste 18.42 Ni 2þ [68] Al-impregnated fly ash 15.75 Ni 2þ [69] Chitosan/cotton fibers (via Schiff base bond) 15.74 Cd 2þ [56] Wheat bran 12.00 Ni 2þ [70] Chitosan/cotton fibers (via Schiff base bond) 7.63 Ni 2þ [56] Results of the present study are marked in bold. where ΔG o (kJ/mol) is the change in the free energy of the system, ΔH o (kJ/mol) is the change in the free enthalpy of the system, ΔS o (kJ mol À1 K À1 ) is the change in the free entropy of the system, R (8.314 J mol À1 K À1 ) is the gas constant, K c is the reaction equilibrium constant, and T (K) is the temperature.The changes in enthalpy and entropy were calculated based on the plot of lnK c vs. 1/T, using its slope (À ΔH o R ) and y-axis intercept…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

Adhesive Stalks of Diatom Didymosphenia geminata as a Novel Biological Adsorbent for Hazardous Metals Removal

Wysokowski

Bartczak

Żółtowska-Aksamitowska

et al. 2017

CLEAN Soil Air Water

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The application of biomass derived from the nuisance fresh‐water diatom species Didymosphenia geminata toward the adsorption and removal of heavy‐metal ions from water is reported. The cell‐free polysaccharide‐based stalks of these diatoms are used as adsorbents to remove harmful metal ions: Pb(II), Ni(II), and Cd(II). Detailed analyses of the adsorption kinetics using both pseudo‐first‐order model and pseudo‐second‐order models are performed. The results show a strong correspondence to a pseudo‐second‐order kinetic model. The Langmuir and Freundlich models are used to describe the adsorption isotherms. The correlation coefficients (r2) of the Langmuir model are equal to 0.994 (Pb2+), 0.995 (Cd2+), and 0.995 (Ni2+), and the r2 for the Freundlich model are equal to 0.991 (Pb2+), 0.991 (Cd2+), and 0.987 (Ni2+). The experimental data for all metal ions strongly support the Langmuir isotherm model. It is shown that stalks of D. geminata exhibit exceptional sorption capacity (qm) for Pb(II) ions of 175.48 mg g−1. Additionally, a high sorption capacity for Cd(II) (145.86 mg g−1), and Ni(II) (130.27 mg g−1) is observed. The thermodynamic aspects of the adsorption process of selected metal ions are also discussed. Preliminary tests investigating applications of D. geminata stalks for sewage purification from galvanic industry and battery and accumulator production were performed. These comprehensive studies show that D. geminata can be robustly applied for the removal of harmful metal ions from wastewater.

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“…13,14 However, the hydrophilic nature of starch is susceptible to moisture uptake, which results in inadequate performance, in particular, with respect to the water-vapor permeability and tensile strength. 15,16 To improve the mechanical properties of starch-based films, various blending and compositing techniques have been developed [17][18][19] ; these include mixing with lipids/oil, [20][21][22] blending with protein/gelatin, 8,[23][24][25][26] reinforcing with mineral filler 27 and cellulous fibers, 11,12,28 and self-reinforcing techniques. 9 More recently, reinforcement with polysaccharide-based crystals, such as cellulose and starch crystals, in particular, nanoscale crystals, has attracted great attention.…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterization of starch‐based composite films reinforced by corn and wheat hulls

Ali

Liu

et al. 2017

J of Applied Polymer Sci

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Biodegradable films, with starch as a matrix, were developed and reinforced with wheat and corn hulls. The effect of the particle size of the filler on the microstructure and mechanical and barrier properties of starch‐based films was investigated. We observed that the addition of hulls enhanced the modulus, tensile strength, and impact strength of the starch matrix at the expense of its elongation. The water‐vapor transmission rate results show that corn starch was more efficient in reducing the water‐vapor permeability than wheat hulls. Scanning electron microscopy observations indicated that the compatibility of both fillers with the matrix was quite good; this was expected because all of the components used in this study were hydrophilic and exhibited polar behavior. Optical microscopy and X‐ray diffraction observations indicated that the processing conditions did not affect the crystalline and geometric structures of the hulls. Because all of the components used in this study were from food resources, the films could also be used for edible packaging. © 2017 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2017, 134, 45159.

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Multiple Bowen′s disease in chronic arsenicosis

Cited by 3 publications

References 7 publications

Effect of urea and formamide plasticizers on starch/PVA bioblend sheets

Effect of urea and formamide plasticizers on starch/PVA bioblend sheets

Adhesive Stalks of Diatom Didymosphenia geminata as a Novel Biological Adsorbent for Hazardous Metals Removal

Preparation and characterization of starch‐based composite films reinforced by corn and wheat hulls

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