Insight into the influence of the polymerization time of polydopamine nanoparticles on their size, surface properties and nanomedical applications

2021 ◽  
Author(s):  
Rania Djermane ◽  
Celia Nieto ◽  
Julio C Vargas ◽  
Milena A. Vega ◽  
Eva Martin del Valle
Keyword(s):  
Surface Properties ◽  
Polymerization Time ◽  
Insight Into

In the last decade, novel strategies to synthesize polydopamine nanoparticles (PDA NPs) are continuously arousing due to the great applications that this synthetic melanin analog has in the nanotechnological field....

Insight into surface properties of O2 plasma activated Au/TiO2 prepared by DPU in CO oxidation

2019 ◽  
Vol 337 ◽  
pp. 110-116
Author(s):  
Shuo Zhang ◽  
Wenxia Zhao ◽  
Ailing Ren ◽  
Bin Guo ◽  
Ying Dong ◽  
...  
Keyword(s):  
Co Oxidation ◽  
Surface Properties ◽  
Insight Into ◽  
O2 Plasma

Characterisation of V-type asteroids using phase-curves

2020 ◽  
Author(s):  
Dagmara Oszkiewicz ◽  
Keyword(s):  
Particle Size ◽  
Surface Properties ◽  
Absolute Magnitude ◽  
Phase Curve ◽  
Main Belt ◽  
Substantial Evidence ◽  
High Quality ◽  
Formation And Evolution ◽  
Phase Functions ◽  
Insight Into

<p>Characterisation of the V-type asteroid population may help to comprehend the planetesimal formation and evolution. Asteroid phase-curves are known to relate to surface properties such as asteroid taxonomy, surface roughness, particle size distribution, albedo and many others, providing insight into surface properties of the V-types.<br /><br />Gil-Hutton et al. (2017) showed that the basaltic asteroids display two distinct polarimetric behaviors, which they attributed to the regolith particle size. Considering that phase-curve parameters relate to surface and regolith properties, they may verify those distinct behaviors.<br /><br />We observed about 20 asteroids during around 250 nights (over 500 fragmental lightcurves) to obtain high quality phase curves. We fitted the standard H,G; H,G1,G2, and H, G12 phase functions, limiting them to physical solutions only. This greatly extends the sample of well determined phase-curves for the underrepresented V-types. For asteroids with data from multiple oppositions we used a simultaneous fit assuming the same slope parameters in all apparitions and different absolute magnitude values. From these data we also derived the G12* parameter to be used in single parameter phase functions recommended for fitting low quality photometry. We do not find substantial evidence for any clustering into distinct phase curve parameters groups as suggested by Gil-Hutton et al. 2017. Only one asteroid (2763 Jeans) shows an exceptionally high G2 value.<br /><br />Further work should be conducted to determine slope parameters of more V-types to further verify the division of V-type asteroids into two distinct groups. Obtaining phase curves of non-Vestoids (such as those in the mid and outer Main Belt) may also help clarify if the division into distinct V-type groups is due to particle size or mineralogical differences.</p>

Plantigrade settlement of the musselMytilus coruscusin response to natural biofilms on different surfaces

2014 ◽  
Vol 94 (8) ◽  
pp. 1639-1649 ◽  
Author(s):  
Jin-Long Yang ◽  
Xuan Zhou ◽  
Yi-Feng Li ◽  
Xing-Pan Guo ◽  
Xiao Liang ◽  
...  
Keyword(s):  
Surface Properties ◽  
Gel Electrophoresis ◽  
Denaturing Gradient Gel Electrophoresis ◽  
Dry Weight ◽  
High Variability ◽  
Short Term ◽  
Gradient Gel Electrophoresis ◽  
Diatom Density ◽  
Insight Into ◽  
Natural Biofilms

Surface properties affect the attachment of micro- and macroscopic marine organisms. The current study examined the settlement response of the musselMytilus coruscusplantigrades to natural biofilms formed on surfaces of different wettability. The percentages of plantigrade settlement were not influenced by the biofilms formed on variously wettable surfaces in the short term, but after 10 days, the plantigrade settlement rates decreased on biofilms formed on lower wettability surfaces. In general, lower wettability of the surfaces resulted in the decrease of the dry weight, bacterial and diatom density and the thickness of natural biofilms when compared to high wettability surfaces. In contrast, chlorophyll-aconcentration in biofilms was independent of the initial wettability of the surfaces. Comparative cluster analysis of bacterial denaturing gradient gel electrophoresis patterns revealed that high variability existed between the bacterial community on high wettability surfaces and that on low wettability surfaces. Thus, surface wettability affects the formation of natural biofilms, and this variation in biofilms developed on different wettability surfaces may explain the discrepancy in their corresponding inducing activities onM. coruscusplantigrade settlement. This finding provides new insight into interactions between mussel settlement, biofilm characteristics and surface properties.

New insight into surface properties of LB film of an amphiphilic terpolymer

2011 ◽  
Vol 22 (2) ◽  
pp. 241-244 ◽  
Author(s):  
Xiu Li Yue ◽  
Fang Ma ◽  
Zhi Fei Dai ◽  
Meng Liu ◽  
Lei Xing ◽  
...  
Keyword(s):  
Surface Properties ◽  
Lb Film ◽  
Insight Into

scholarly journals Effect of Water Adsorption on Cation-Surface Interaction Energy in the Na-Mordenite of 5.5 : 1 Si/Al Ratio

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Sekou Diaby
Keyword(s):  
Activation Energy ◽  
Surface Properties ◽  
Surface Potential ◽  
Water Adsorption ◽  
Adsorbed Water ◽  
Material Surface ◽  
Water Molecules ◽  
Zeolite Surface ◽  
Inner Surface ◽  
Insight Into

The mobility of the Na+cations localized at the inner surface of the studied mordenite zeolite depends on the material surface properties. In this work, we show that the activation energy,ΔEhop, relating to the Na+cation hopping displacement is associated to the surface potential and therefore can be used to get a better insight into the zeolite surface properties. Indeed, when molecules as water are adsorbed at the surface, they modify the surface potential energy and hence influence the value ofΔEhop. If the adsorbed molecules are polar they directly interact with the cations which become more mobile. The more theΔEhopvalue is, the less the amount of adsorbed water molecules is. Alterations of theΔEhopvalue with respect to the amount of adsorbed water molecules are interpreted using the Dubinin model which is based on simple adsorption principle.

scholarly journals A force field for tricalcium aluminate to characterize surface properties, initial hydration, and organically modified interfaces in atomic resolution

2014 ◽  
Vol 43 (27) ◽  
pp. 10602-10616 ◽  
Author(s):  
Ratan K. Mishra ◽  
Lucia Fernández-Carrasco ◽  
Robert J. Flatt ◽  
Hendrik Heinz
Keyword(s):  
Force Field ◽  
Surface Properties ◽  
Surface Forces ◽  
Atomic Resolution ◽  
Molecular Adsorption ◽  
Hydration Reaction ◽  
Tricalcium Aluminate ◽  
Organically Modified ◽  
Insight Into

A force field for tricalcium aluminate is presented, validated, and applied to generate insight into surface forces, the hydration reaction, and molecular adsorption that remains elusive from experiment.

Insight into the structural, chemical and surface properties of proteins for the efficient ultrasound assisted co-encapsulation and delivery of micronutrients

2021 ◽  
pp. 130236
Author(s):  
Haiyan Zhu ◽  
Srinivas Mettu ◽  
Md. Arifur Rahim ◽  
Francesca Cavalieri ◽  
Muthupandian Ashokkumar
Keyword(s):  
Surface Properties ◽  
Ultrasound Assisted ◽  
Insight Into
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