Influence of pH of the BSA solutions on velocity of the rising bubbles and stability of the thin liquid films and foams

Zawała, Jan; Todorov, R.; Olszewska, Anna; Exerowa, D.; Małysa, K.

doi:10.1007/s10450-010-9232-3

Cited by 26 publications

(15 citation statements)

References 38 publications

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“…The terminal velocities of the bubbles (u t ) rising in columns of L 9 = 2 and L 11 = 10 mm were 30.5 ± 0.1 cm/s and 34.3 ± 0.1 cm/s, respectively. The u t of the bubble calculated for the larger column remains in very close agreement with the experimentally determined value u t = 34.7 ± 0.2 cm/s . Similar trends can be observed for bubble shape deformation χ, presented in Figure .…”

Section: Resultssupporting

confidence: 87%

See 1 more Smart Citation

Energy balance in viscous liquid containing a bubble: Rise due to buoyancy

Zawała

2016

Can J Chem Eng

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The total energy balance of a system consisting of a bubble (radius 0.74 mm) freely rising in viscous liquid under the action of buoyancy was considered. Values of bubble acceleration, local and terminal velocities, and shape deformations calculated by numerically solving the Navier-Stokes equation are compared with experimentally determined values. Additionally, the energies of the system associated with bubble motion (kinetic, potential, and rate of viscous energy dissipation), obtained from simulations, are given. On the basis of energy balances obtained for the system, two independent relations describing the motion of a bubble (Lagrange and Joseph equations) were used to show that, for steady-state conditions, the constant (terminal) velocity of the bubble is a result of balance between buoyancy force and the drag originating from energy dissipation due to fluid viscosity. According to the calculations performed, the discrepancy between the expected and actual results of the Lagrange and Joseph equations for the system considered was $1 %. The estimated added mass coefficient was in close agreement with expected theoretical value for deformed spheres, and increased with decreasing tube radius.

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Section: Resultssupporting

confidence: 87%

“…The u t of the bubble calculated for the larger column remains in very close agreement with the experimentally determined value u t ¼ 34.7 AE 0.2 cm/s. [35] Similar trends can be observed for bubble shape deformation x, presented in Figure 8. For the column of L 9 ¼ 2 mm the average value of is 1.43, i.e.…”

Section: Determination Of Bubble Motion Parameterssupporting

confidence: 79%

Energy balance in viscous liquid containing a bubble: Rise due to buoyancy

Zawała

2016

Can J Chem Eng

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“…39 It has been reported that protein molecules show the highest surface activity and are generally adsorbed most readily to surfaces when their pH is close to the isoelectric point of the surface. 40 However, most of the FN was lost during rinsing as the high-molecular-weight macromolecule FN barely assembled into the nanotubes. This can explain why the highest concentration of bound protein after the rinsing step was constituted by histone ( Figure 9B).…”

Section: Early Cell Adhesion and Proliferation Abilitymentioning

confidence: 99%

Effects of hydrogenated TiO<sub>2</sub> nanotube arrays on protein adsorption and compatibility with osteoblast-like cells

Lu¹,

Wang²,

Wang³

et al. 2018

IJN

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BackgroundModified titanium (Ti) substrates with titanium dioxide (TiO2) nanotubes have broad usage as implant surface treatments and as drug delivery systems.MethodsTo improve drug-loading capacity and accelerate bone integration with titanium, in this study, we hydrogenated anodized titanium dioxide nanotubes (TNTs) by a thermal treatment. Three groups were examined, namely: hydrogenated TNTs (H2-TNTs, test), unmodified TNTs (air-TNTs, control), and Ti substrates (Ti, control).ResultsOur results showed that oxygen vacancies were present in all the nanotubes. The quantity of -OH groups greatly increased after hydrogenation. Furthermore, the protein adsorption and loading capacity of the H2-TNTs were considerably enhanced as compared with the properties of the air-TNTs (P<0.05). Additionally, time-of-flight secondary ion mass spectrometry (TOF-SIMS) was used to investigate the interactions of TNTs with proteins. During the protein-loading process, the H2-TNTs not only enabled rapid protein adsorption, but also decreased the rate of protein elution compared with that of the air-TNTs. We found that the H2-TNTs exhibited better biocompatibility than the air-TNT and Ti groups. Both cell adhesion activity and alkaline phosphatase activity were significantly improved toward MG-63 human osteoblast-like cells as compared with the control groups (P<0.05).ConclusionWe conclude that hydrogenated TNTs could greatly improve the loading capacity of bioactive molecules and MG-63 cell proliferation.

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“…These parameters are: film thinning times, critical concentration for black film formation, film stability in terms of probability for stable black foam film formation, film thickness and dependence of its change under applied external pressure, interactions with substances in the bulk, etc. They could be used to direction of optimization and improvement the production technologies as well as development of new generation of therapeutic surfactant preparations [16,17,18,19].…”

Section: Smart Systems and Formulations With Possible Medical Applicamentioning

confidence: 99%

Smart and green interfaces: From single bubbles/drops to industrial environmental and biomedical applications

Dutschk

Karapantsios

Liggieri

et al. 2014

Advances in Colloid and Interface Science

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Interfaces can be called Smart and Green (S&G) when tailored such that the required technologies can be implemented with high efficiency, adaptability and selectivity. At the same time they have also to be eco-friendly, i.e. products must be biodegradable, reusable or simply more durable. Bubble and drop interfaces are in many of these smart technologies the fundamental entities and help develop smart products of the everyday life.Significant improvements of these processes and products can be achieved by implementing and manipulating specific properties of these interfaces in a simple and smart way, in order to accomplish specific tasks. The severe environmental issues require in addition attributing ecofriendly features to these interfaces, by incorporating innovative , or, sometime, recycle materials and conceiving new production processes which minimize the use of natural resources and energy. Such concept can be extended to include important societal challenges related to support a sustainable development and a healthy population.The achievement of such ambitious targets requires the technology research to be supported by a robust development of theoretical and experimental tools, needed to understand in more details the behavior of complex interfaces. A wide but not exhaustive review of recent work concerned with green and smart interfaces is presented, addressing different scientific and technological fields. The presented approaches reveal a huge potential in relation to various technological fields, such as nanotechnologies, biotechnologies, medical diagnostics, new or improved materials.

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Influence of pH of the BSA solutions on velocity of the rising bubbles and stability of the thin liquid films and foams

Cited by 26 publications

References 38 publications

Energy balance in viscous liquid containing a bubble: Rise due to buoyancy

Energy balance in viscous liquid containing a bubble: Rise due to buoyancy

Effects of hydrogenated TiO<sub>2</sub> nanotube arrays on protein adsorption and compatibility with osteoblast-like cells

Smart and green interfaces: From single bubbles/drops to industrial environmental and biomedical applications

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