Gold nanoparticles (AuNPs) of various shapes (including spheres, stars and flowers), with similar dimensions, were synthesized evaluated for their antibacterial effects toward Staphylococcus aureus, a bacterium responsible numerous life-threatening infections worldwide. Optical growth curve measurements Gompertz modeling showed significant AuNP shape- concentration-dependent decreases in bacterial increases lag time. To evaluate prospective use vivo systems, the cytotoxicity same AuNPs was...

A new surface modification followed by calculation of Hansen solubility parameters to predict dispersability cellulose nanocrystals in LDPE is presented.

Nanostructured calcium phosphate (CaP) has been histologically and biomechanically proven to enhance osseointegration of implants; however, conventional techniques were not sufficiently sensitive capture its biological effects fully. Here, we compared the removal torque (RTQ) evaluation gene expression in tissues around nanostructured CaP-coated implants, using real-time RT-PCR, with those uncoated a rabbit model. At 2 wks, RTQ values significantly higher, alkaline phosphatase (ALP) was...

Abstract: Implant-associated infections are undesirable complications that might arise after implant surgery. If the infection is not prevented, it can lead to tremendous cost, trauma, and even life threatening conditions for patient. Development of an coating loaded with antimicrobial substances would be effective way improve success rate implants. In this study, in vitro efficacy mesoporous titania thin films used as a novel release was evaluated. Mesoporous pore diameters 4, 6, 7 nm were...

It has been demonstrated that the pharmaceutical molecule, Ibuprofen, can be loaded into mesoporous silica using liquid (near-critical) carbon dioxide as solvent, and resulting material had a high Ibuprofen content (300 mg Ibuprofen/g SiO2). A enrichment times) of in pores was observed comparison to concentration solution. When similar experiments were performed CO2 (l) mixed with minor amounts (5 mol-%) other organic cosolvents (cyclohexane, acetone or methanol), significantly lower loading...

The foaming properties of typical chemithermo-mechanical (CTMP) and kraft pulp paper making formulations in the presence a series surfactants were investigated using lab-scale set u ...

A model molecule, ibuprofen, was loaded in the pores of mesoporous silica by adsorption from nonpolar solvents (liquid carbon dioxide and cyclohexane) a polar solvent (methanol). It sufficient with very low concentration ibuprofen to achieve maximum loading particles. When using liquid dioxide, particles were filled completely at lower than similar experiments performed cyclohexane. methanol used, amount never achieved. Furthermore, x-ray scattering showed that all into an amorphous state....

Vortex dynamics is studied in coupled multilayer structures, containing N 24-\AA{}-thick ${\mathrm{DyBa}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ layers, each separated from the next by 96 \AA{} of (${\mathrm{Y}}_{1\mathrm{\ensuremath{-}}\mathit{x}}$${\mathrm{Pr}}_{\mathit{x}}$)${\mathrm{Ba}}_{2}$${\mathrm{Cu}}_{3}$${\mathrm{O}}_{7}$ (x=0.4, 0.55). When magnetic field parallel to c axis, we find that activation energy U for flux motion increases linearly with number superconducting layers...

This article focuses on the properties of paper samples made using foam-laid technology. The effects of three surfactants, namely sodium dodecyl sulphate (SDS), alkyl ether (SAES), ...

Optical tweezers were used to study the interaction and attachment of human bone cells various types medical implant materials. Ideally, should facilitate cell promote migration progenitor in order decrease healing time. It is therefore interest, a controlled manner, be able monitor adhesion process. Results from such studies would help foresee clinical outcome integrating implants. The interactions between two primary culture models, gingival fibroblasts forming osteoblast cells, three...

Abstract An interpenetrating polymer network (IPN) combining a hydrophobic (polydimethylsiloxane, PDMS) and hydrophilic (polyvinylpyrrolidone, PVP) was synthesized in different solvents via two‐step preparation method. The solvent used during polymerization of the IPN showed significant impact on properties PVP/PDMS‐IPN. choice affecting both wettability transparency PVP/PDMS‐IPNs turned all this study, but transition from to PVP/PDMS‐IPN occurred at lower PVP concentration if with similar...

We report on the observation of a change in field dependence critical current density ${J}_{c}$ ${\mathrm{DyBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}/({\mathrm{Y}}_{0.45}{\mathrm{Pr}}_{0.55}){\mathrm{Ba}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7}$ superlattices at characteristic magnetic ${H}_{s}^{*}$. This shows up as an abrupt transition when analyzing current-voltage ( $I\ensuremath{-}V$) characteristics framework vortex glass and collective flux creep theories. behavior can be traced back to...

In a recent paper, Sakata et al. [Phys. Rev. B 83, 220512(R) (2011)] report on superconductivity at 29 K in Ca under high pressure. Here, I argue that their method to define the onset of superconducting transition temperature from resistivity measurements is misleading and correct value for based data shown paper should be 21 K. The discrepancy between these two temperatures explained by fluctuations occurring above temperature.

An in silico method has been developed that permits the binary differentiation between pure liquids causing serious eye damage or irritation, and with no need for such classification, according to UN GHS system. The is based on finding Hansen Solubility Parameters (HSP) of a liquid are collectively important predictors irritation. Thus, by applying two-tier approach which silico-predicted pKa values (firstly) trained model solely HSP data (secondly) were used, we have developed, validated,...

Aquatic environments are typically not homogenous, but characterized by changing substrate concentration gradients and nutrient patches. This heterogeneity in availability creates a multitude of niches allowing bacteria with different utilization strategies to hypothetically coexist even when competing for the same substrate. To study impact heterogeneous distribution organic substrates on bacterioplankton, bioreactors freshwater bacterial communities were fed artificial medium acetate...

The vortex dynamics of a ${\mathrm{Tl}}_{2}{\mathrm{Ba}}_{2}{\mathrm{CaCu}}_{2}{\mathrm{O}}_{8+\mathrm{\ensuremath{\delta}}}$ thin film has been measured by electrical resistivity and $I\ensuremath{-}V$ characteristics. temperature ${T}^{*}(B)$ defined from vortex-glass analysis the in liquid state using Vogel-Fulcher relation is shown to be consistent with vortex-glass-like scaling characteristics high dissipation regime. Below ${T}^{*},$ there however significant range which flux creep...