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The Influence of Selected Osmotic Dehydration and Pretreatment Parameters on Dry Matter and Polyphenol Content in Highbush Blueberry (Vaccinium corymbosum L.) Fruits

27-11-2012 | Anna Kucner, Robert Klewicki, Michał Sójka, Food and Bioprocess Technology, 2012

The paper presents an assessment of the influence of selected highbush blueberry pretreatment methods and parameters on the process of osmotic dehydration conducted in 65 °Brix sucrose solution for 5 to 240 min at 30–70 °C. The pretreatment methods used included: fruit immersion in boiling water ...

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Effect of agglomeration of silver nanoparticle on nanotoxicity depression

27-11-2012 | Eunjoo Bae, Byung-Cheun Lee, Younghun Kim, Kyunghee Choi, Jongheop Yi, Korean Journal of Chemical Engineering, 2012

Silver nanoparticles (AgNPs) are used commercially in a variety of applications, including textiles, cosmetics, spray cleaning agents, and metal products. AgNP itself, however, is classified as an environmental hazard by Environmental Protection Agency (EPA, USA) Nanotechnology White Paper, due ...

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Photo-responsive microgels composed of polymeric β-cyclodextrin and Tween 20-coumarin conjugate

27-11-2012 | Jing Dai, Seung Ree Seo, Jin-Chul Kim, Korean Journal of Chemical Engineering, 2012

Photo-responsive microgels were prepared by taking advantage of the interaction between Tween 20-coumarin conjugate (TCC) and polymeric β-cyclodextrin (PβCD). TCC was prepared by covalently attaching coumarin to the hydroxyl group of the head (PEO segment) of Tween 20. The molar ratio of coumarin ...

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Effect of Additives on the Cloud Point of the Octylphenol Ethoxylate (30EO) Nonionic Surfactant

27-11-2012 | Sarah A. N. Rocha, Cibele R. Costa, Joil J. Celino, Leonardo S. G. Teixeira, Journal of Surfactants and Detergents, 2012

The effect of different additives on the cloud point (CP) of an octylphenol ethoxylate (OPEO30) aqueous solution was investigated. The CP of OPEO30 is higher than 100 °C due to its approximately 30 oxyethylene units per molecule, which limits its use in cloud point extraction (CPE) procedures at ...

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Synthesis and rheological properties of hydrophobically modified poly(vinyl alcohol)

27-11-2012 | Qiaoman Hu, Guangsu Huang, Jing Zheng, Heng Su, Chao Guo, Journal of Polymer Research, 2012

A novel series of water-soluble hydrophobically modified poly(vinyl alcohol) (HMPVA) with various hydrophobe contents was prepared by grafting poly(vinyl alcohol) (PVA) using 1-dodecanol and toluene-2,4-diisocyanate as hydrophobic monomer and coupling agent, respectively. The chemical structure ...

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Structure of materials based on bismuth chalcogenides and obtained by torsional severe plastic deformation

26-11-2012 | D. I. Bogomolov, V. T. Bublik, O. B. Sokolov, N. Yu. Tabachkova, Metal Science and Heat Treatment, 2012

The structure of bulk specimens of powders of Bi2Te2.7Se0.3 solid solution after severe torsional plastic deformation at a pressure of 250 MPa and a temperature of 380°C is studied. The microstructure of the specimens is determined by the methods of x-ray diffractometry and scanning and ...

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Surfactants for CNTs dispersion in zirconia-based ceramic matrix by sol–gel method

26-11-2012 | V. O. Almeida, N. M. Balzaretti, T. M. H. Costa, G. B. Machado, M. R. Gallas, Journal of Sol-Gel Science and Technology, 2012

Zirconium oxide is a ceramic material widely studied due to its mechanical and electrical properties that can be improved with the use of carbon nanotubes (CNTs) as reinforcement. The synthesis of CNT/zirconia composites by sol–gel method is still very scarce, due to the hydrophobic nature of the ...

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Studies on thermo-acoustic parameters in the dilute solutions of poly(ethyleneglycol)

26-11-2012 | F. M. Sannaningannavar, B. S. Navati, N. H. Ayachit, Polymer Bulletin, 2012

Ultrasonic velocities and densities have been measured for the dilute solutions of poly(ethylene glycol) of average molecular mass 400 g mol−1 in benzene at different temperatures between 299 and 328 K. The experimental data have been used to compute the thermo-acoustical parameters namely ...

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Nanosized micelles self-assembled from amphiphilic poly(citric acid)–poly(ε-caprolactone)–poly(citric acid) copolymers

26-11-2012 | Homa Gheybi, Ali Akbar Entezami, Polymer Bulletin, 2012

In this study, novel ABA-type amphiphilic copolymers consisting of poly(citric acid) (PCA) (A) as hydrophilic segment and poly(ε-caprolactone) (PCL) (B) as hydrophobic block were prepared by an approach in the following two steps: (1) ring-opening polymerization (ROP) of ε-caprolactone with ...

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Effects of the Electrostatic Repulsion Between Nanoparticles on Colorimetric Sensing: An Investigation of Determination of Hg2+ with Silver Nanoparticles

26-11-2012 | Hongliang Tan, Baoxia Liu, Yang Chen, Plasmonics, 2012

The electrostatic repulsion between metal nanoparticles has an important effect on the colorimetric assays based on the aggregation of nanoparticles. In this work, an Hg2+ colorimetric sensor based on silver nanoparticles (AgNPs) was used as a model system to study the effects of electrostatic ...

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