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Artículos de revistas sobre el tema "Rheolog Ionic strength"

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1

Kopplin, Georg, Anders Lervik, Kurt I. Draget, and Finn L. Aachmann. "Alginate gels crosslinked with chitosan oligomers – a systematic investigation into alginate block structure and chitosan oligomer interaction." RSC Advances 11, no. 23 (2021): 13780–98. http://dx.doi.org/10.1039/d1ra01003d.

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Three alginates with different block structures, poly-M, poly-G, and poly-MG, were investigated upon ionic crosslinking with chitosan oligomers, using circular dichroism, rheology, and simulations, revealing a unique high gel strength poly-MG chitosan gelling system.
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2

Tan, Beng H., Kam C. Tam, Yee C. Lam, and Chee B. Tan. "Microstructure and Rheology of Stimuli-Responsive Nanocolloidal SystemsEffect of Ionic Strength." Langmuir 20, no. 26 (2004): 11380–86. http://dx.doi.org/10.1021/la0481290.

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3

Lin, Yuan, Huaitao Qin, Jin Guo, and Jiawang Chen. "Rheology of bentonite dispersions: Role of ionic strength and solid content." Applied Clay Science 214 (November 2021): 106275. http://dx.doi.org/10.1016/j.clay.2021.106275.

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4

MOHAMMADI, ALIASGHAR, and REGHAN J. HILL. "Dynamics of uncharged colloidal inclusions in polyelectrolyte hydrogels." Journal of Fluid Mechanics 669 (January 14, 2011): 298–327. http://dx.doi.org/10.1017/s0022112010005045.

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We calculate the dynamics of an uncharged colloidal sphere embedded in a quenched polyelectrolyte hydrogel to (i) an oscillatory (optical and magnetic) force, as adopted in classical micro-rheology, and (ii) an oscillatory electric field, as adopted in electrical micro-rheology and electro-acoustics. The hydrogel is modelled as a linearly elastic porous medium with the charge fixed to the skeleton and saturated with a Newtonian electrolyte; and the colloidal inclusion is modelled as a rigid, impenetrable sphere. The dynamic micro-rheological susceptibility, defined as the ratio of the particle
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5

Weijers, M., L. M. C. Sagis, C. Veerman, B. Sperber, and E. van der Linden. "Rheology and structure of ovalbumin gels at low pH and low ionic strength." Food Hydrocolloids 16, no. 3 (2002): 269–76. http://dx.doi.org/10.1016/s0268-005x(01)00097-2.

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6

Choppe, Emilie, Fanny Puaud, Taco Nicolai, and Lazhar Benyahia. "Rheology of xanthan solutions as a function of temperature, concentration and ionic strength." Carbohydrate Polymers 82, no. 4 (2010): 1228–35. http://dx.doi.org/10.1016/j.carbpol.2010.06.056.

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7

Shafiei-Sabet, S., W. Y. Hamad, and S. G. Hatzikiriakos. "Ionic strength effects on the microstructure and shear rheology of cellulose nanocrystal suspensions." Cellulose 21, no. 5 (2014): 3347–59. http://dx.doi.org/10.1007/s10570-014-0407-z.

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8

Liu, Jun, Youn Young Shim, and Martin J. T. Reaney. "Ionic strength and hydrogen bonding effects on whey protein isolate–flaxseed gum coacervate rheology." Food Science & Nutrition 8, no. 4 (2020): 2102–11. http://dx.doi.org/10.1002/fsn3.1504.

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9

Bhosale, Prasad S., and John C. Berg. "Poly(acrylic acid) as a rheology modifier for dense alumina dispersions in high ionic strength environments." Colloids and Surfaces A: Physicochemical and Engineering Aspects 362, no. 1-3 (2010): 71–76. http://dx.doi.org/10.1016/j.colsurfa.2010.03.043.

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10

Sovilj, Verica, Petar Dokic, and Lidija Petrovic. "Rheologycal properties of sodium carboxymethylcellulose in the presence of electrolyte and mixed micelle of surfactants." Acta Periodica Technologica, no. 34 (2003): 71–82. http://dx.doi.org/10.2298/apt0334071s.

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One of the most significant aspects of polymer-surfactant interaction, from the practical point of view, is that of rheology control and viscosity enhancement. In the oppositely charged polyelectrolyte-surfactant system strong ionic interaction often leads to precipitation of the formed complex yielding serious problems. In this paper the interaction between anionic polyelectrolyte - sodium carboxymethylcellulose (NaCMC) and cationic surfactant - cethyltrimethylammonium bromide (CTMAB) has been investigated by rheological measurements. Addition of electrolyte NaBr and nonionic surfactant - Twe
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11

Chai, Changhoon, Jooyoung Lee та Qingrong Huang. "The effect of ionic strength on the rheology of pH-induced bovine serum albumin/κ-carrageenan coacervates". LWT - Food Science and Technology 59, № 1 (2014): 356–60. http://dx.doi.org/10.1016/j.lwt.2014.05.024.

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12

Chang, S. H., M. H. Ryan, and R. K. Gupta. "The effect of pH, ionic strength, and temperature on the rheology and stability of aqueous clay suspensions." Rheologica Acta 32, no. 3 (1993): 263–69. http://dx.doi.org/10.1007/bf00434190.

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13

Ulaganathan, V., I. Retzlaff, J. Y. Won та ін. "β-Lactoglobulin adsorption layers at the water/air surface: 2. Dilational rheology: Effect of pH and ionic strength". Colloids and Surfaces A: Physicochemical and Engineering Aspects 521 (травень 2017): 167–76. http://dx.doi.org/10.1016/j.colsurfa.2016.08.064.

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14

He, Jin-Song, Norihiro Azuma, and Hongwei Yang. "Effects of pH and ionic strength on the rheology and microstructure of a pressure-induced whey protein gel." International Dairy Journal 20, no. 2 (2010): 89–95. http://dx.doi.org/10.1016/j.idairyj.2009.08.006.

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15

Fneich, Fatima, Julien Ville, Bastien Seantier, and Thierry Aubry. "Structure and rheology of aqueous suspensions and hydrogels of cellulose nanofibrils: Effect of volume fraction and ionic strength." Carbohydrate Polymers 211 (May 2019): 315–21. http://dx.doi.org/10.1016/j.carbpol.2019.01.099.

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16

Illner, Sabine, Olga Sahmel, Stefan Siewert, Thomas Eickner, and Niels Grabow. "Rheological analysis of hybrid hydrogels during polymerization processes." Current Directions in Biomedical Engineering 3, no. 2 (2017): 699–702. http://dx.doi.org/10.1515/cdbme-2017-0148.

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AbstractDevelopment of new implant coatings with temperature-controlled drug release to treat infections after device implantation can be triggered by highly elastic hydrogels with adequate stability and adhesive strength in the swollen state. By using an ionic liquid (IL [ViPrIm]+[Br]−) as additive to N-isopropylacrylamide (NIPAAm) unique effects on volumetric changes and mechanical properties as well as thermoresponsive drug release of the obtained hybrid hydrogels were observed. In this context, rheological measurements allow the monitoring of gelation processes as well as chemical, mechani
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17

Meijerink, Marc, Frank van Mastrigt, Linda E. Franken, Marc C. A. Stuart, Francesco Picchioni, and Patrizio Raffa. "Triblock copolymers of styrene and sodium methacrylate as smart materials: synthesis and rheological characterization." Pure and Applied Chemistry 89, no. 11 (2017): 1641–58. http://dx.doi.org/10.1515/pac-2016-1021.

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AbstractWell-defined amphiphilic triblock poly(sodium methacrylate)-polystyrene-poly(sodium methacrylate) (PMAA-b-PS-b-PMAA) copolymers characterized by a different length of either the hydrophilic or the hydrophobic block have been synthesized by ATRP. In solution the micelle-like aggregates consist of a collapsed PS core surrounded by stretched charged PMAA chains. The micelles are kinetically ‘frozen’ and as a consequence the triblock copolymers do not show a significant surface activity. The hydrophilic block length has a major influence on the rheology, the shortest PMAA blocks yielding t
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18

Yan, Hui, Antti Nykanen, Janne Ruokolainen, David Farrar, and Aline F. Miller. "Protein Fibrillar Hydrogels for three-Dimensional Tissue Engineering." Research Letters in Nanotechnology 2009 (2009): 1–4. http://dx.doi.org/10.1155/2009/614301.

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Protein self-assembly into highly ordered fibrillar aggregates has attracted increasing attention over recent years, due primarily to its association with disease states such as Alzheimer's. More recently, however, research has focused on understanding the generic behavior of protein self-assembly where fibrillation is typically induced under harsh conditions of low pH and/or high temperature. Moreover the inherent properties of these fibrils, including their nanoscale dimension, environmental responsiveness, and biological compatibility, are attracting substantial interest for exploiting thes
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19

Rühs, Patrick A., Nathalie Scheuble, Erich J. Windhab, Raffaele Mezzenga та Peter Fischer. "Simultaneous Control of pH and Ionic Strength during Interfacial Rheology of β-Lactoglobulin Fibrils Adsorbed at Liquid/Liquid Interfaces". Langmuir 28, № 34 (2012): 12536–43. http://dx.doi.org/10.1021/la3026705.

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20

Costa, Vera L. D., Ana P. Costa, and Rogério M. S. Simões. "Nanofibrillated cellulose rheology: Effects of morphology, ethanol/acetone addition, and high NaCl concentration." BioResources 14, no. 4 (2019): 7636–54. http://dx.doi.org/10.15376/biores.14.4.7636-7654.

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The effects of ethanol or acetone addition (2.5% to 40% w/w) and high ionic strength (50 mM to 1000 mM NaCl) on the rheology of carboxymethylated (NFC-carb) and 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) oxidized (NFC-TEMPO) nanofibrillated cellulose (NFC) suspensions were studied. Morphological characterization and centrifugation showed that NFC-TEMPO had a much finer overall morphology than NFC-carb. Rheological measurements were taken at 1.3 wt% using a stress-controlled rheometer equipped with cone and plate measurement tools with rough surfaces. The dynamic moduli were investigated thro
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21

Saxena, Amit, A. K. Pathak, and Keka Ojha. "Synergistic Effects of Ionic Characteristics of Surfactants on Aqueous Foam Stability, Gel Strength, and Rheology in the Presence of Neutral Polymer." Industrial & Engineering Chemistry Research 53, no. 49 (2014): 19184–91. http://dx.doi.org/10.1021/ie502598s.

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22

Terech, P., S. Dourdain, U. Maitra, and S. Bhat. "Structure and Rheology of Cationic Molecular Hydrogels of Quinuclidine Grafted Bile Salts. Influence of the Ionic Strength and Counter-Ion type." Journal of Physical Chemistry B 113, no. 14 (2009): 4619–30. http://dx.doi.org/10.1021/jp809336g.

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23

Raffa, Patrizio, Piter Brandenburg, Diego A. Z. Wever, Antonius A. Broekhuis, and Francesco Picchioni. "Polystyrene–Poly(sodium methacrylate) Amphiphilic Block Copolymers by ATRP: Effect of Structure, pH, and Ionic Strength on Rheology of Aqueous Solutions." Macromolecules 46, no. 17 (2013): 7106–11. http://dx.doi.org/10.1021/ma401453j.

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24

Xiong, Wenfei, Cong Ren, Mo Tian, Xuejun Yang, Jing Li, and Bin Li. "Complex coacervation of ovalbumin-carboxymethylcellulose assessed by isothermal titration calorimeter and rheology: Effect of ionic strength and charge density of polysaccharide." Food Hydrocolloids 73 (December 2017): 41–50. http://dx.doi.org/10.1016/j.foodhyd.2017.06.031.

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25

DiGuiseppi, David, Jodi Kraus, Siobhan E. Toal, Nicolas Alvarez, and Reinhard Schweitzer-Stenner. "Investigating the Formation of a Repulsive Hydrogel of a Cationic 16mer Peptide at Low Ionic Strength in Water by Vibrational Spectroscopy and Rheology." Journal of Physical Chemistry B 120, no. 38 (2016): 10079–90. http://dx.doi.org/10.1021/acs.jpcb.6b07673.

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26

Chirkov, Nikolay S., Richard A. Campbell, Alexander V. Michailov, Petr S. Vlasov, and Boris A. Noskov. "DNA Interaction with a Polyelectrolyte Monolayer at Solution—Air Interface." Polymers 13, no. 16 (2021): 2820. http://dx.doi.org/10.3390/polym13162820.

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The formation of ordered 2D nanostructures of double stranded DNA molecules at various interfaces attracts more and more focus in medical and engineering research, but the underlying intermolecular interactions still require elucidation. Recently, it has been revealed that mixtures of DNA with a series of hydrophobic cationic polyelectrolytes including poly(N,N-diallyl-N-hexyl-N-methylammonium) chloride (PDAHMAC) form a network of ribbonlike or threadlike aggregates at the solution—air interface. In the present work, we adopt a novel approach to confine the same polyelectrolyte at the solution
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27

Feng, Tingting, Xingwei Wang, Xuejiao Wang, Shuqin Xia, and Qingrong Huang. "Plant protein-based antioxidant Pickering emulsions and high internal phase Pickering emulsions against broad pH range and high ionic strength: Effects of interfacial rheology and microstructure." LWT 150 (October 2021): 111953. http://dx.doi.org/10.1016/j.lwt.2021.111953.

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28

Theng, B. K. G., and N. Wells. "The flow characteristics of halloysite suspensions." Clay Minerals 30, no. 2 (1995): 99–106. http://dx.doi.org/10.1180/claymin.1995.030.2.02.

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AbstractThe rheology of aqueous suspensions of Na halloysites with different particle shape has been investigated using a Haake rotary viscometer. Three halloysites from New Zealand were used: Matauri Bay (MB), Te Akatea (TA) and Opotiki (Op) which are mainly composed of thick long tubules, short thin laths, and spherules, respectively. Suspensions of the materials subsequently prepared from the MB and TA samples show a pseudoplastic consistency under shear, characterized by a steep initial rise in shear stress as shear rate increases, followed by a linear increase in stress when a certain she
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29

NASIRUDDIN KHAN, M., and ANILA SARWAR. "DETERMINATION OF POINTS OF ZERO CHARGE OF NATURAL AND TREATED ADSORBENTS." Surface Review and Letters 14, no. 03 (2007): 461–69. http://dx.doi.org/10.1142/s0218625x07009517.

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Although particle size and its measurement are intuitively familiar to particle technologists, the concept of point of zero charge (pzc) is less widely understood and applied. This is unfortunate since it is at least as fundamentally important as particle size in determining the behavior of particulate materials, especially those with sizes in the colloidal range below a micrometer. pzc is related to the charge on the surface of the particle and strongly depends on the pH of the material; so it influences a wide range of properties of colloidal materials, such as their stability, interaction w
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30

Lee, Minhyeong, Jooyoung Im, Gye-Chun Cho, Hee Hwan Ryu, and Ilhan Chang. "Interfacial Shearing Behavior along Xanthan Gum Biopolymer-Treated Sand and Solid Interfaces and Its Meaning in Geotechnical Engineering Aspects." Applied Sciences 11, no. 1 (2020): 139. http://dx.doi.org/10.3390/app11010139.

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Recently, environment-friendly microbial biopolymer has been widely applied as a new construction material in geotechnical engineering practices including soil stabilization, slope protection, and ground injection. Biopolymer is known to exhibit substantial improvements in geotechnical properties, such as shear strength enhancement and hydraulic conductivity reduction, through the formation of direct ionic bonds with soil particles, especially clay particles. Moreover, the rheological characteristics (e.g., pseudoplasticity, shear-rate dependent thixotropy) of biopolymers render distinctive be
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31

Clancy, S. F., J. G. Fuller, T. Scheidt, and H. H. Paradies. "Dynamic Properties of Entangled Wormlike Micelles: Sodium Laurylethersulfate at High Ionic Strength-(II)." Zeitschrift für Physikalische Chemie 215, no. 7 (2001). http://dx.doi.org/10.1524/zpch.2001.215.7.905.

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We report on the viscous behaviour of long and flexible wormlike micelles at volume fractions between Ø = 0.05–0.14 comprised of sodium laurylethersulfate (SLES) in 0.15–0.5 M NaCl equivalent of SLES concentrations between 20–50 mM at temperatures ranging from 25 °C to 45 °C by means of static and dynamic light scattering and rheology, which is an extension of previous experiments on dilute/semi-dilute solutions of SLES micelles at much lower surfactant concentrations in the presence of low salt concentrations (Clancy and Paradies, Z. Phys. Chem.
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32

Biswas, Tuser T., Junchun Yu, and Vincent A. Nierstrasz. "Effects of ink characteristics and piezo-electric inkjetting parameters on lysozyme activity." Scientific Reports 9, no. 1 (2019). http://dx.doi.org/10.1038/s41598-019-54723-9.

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AbstractInkjet printing of enzymes can facilitate many novel applications where a small amount of materials need to be deposited in a precise and flexible manner. However, maintaining the satisfactory activity of inkjet printed enzyme is a challenging task due to the requirements of ink rheology and printhead parameters. Thus to find optimum inkjetting conditions we studied the effects of several ink formulation and jetting parameters on lysozyme activity using a piezoelectric printhead. Within linear activity range of protein concentrations ink containing 50 µg/mL lysozyme showed a satisfacto
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