Results 21 to 30 of about 4,631,256 (302)

A spontaneously formed plasmonic-MoTe2 hybrid platform for ultrasensitive Raman enhancement

open access: yesCell Reports Physical Science, 2021
Summary: Development of highly sensitive, stable, and repeatable surface-enhanced Raman scattering (SERS) substrates is crucial for analytical detection, which is a challenge for traditional metallic structures.
Li Tao   +12 more
doaj   +1 more source

Surface area or diameter – which factor really determines the antibacterial activity of silver nanoparticles grown on TiO₂ coatings? [PDF]

open access: yes, 2014
Titanium dioxide coatings were prepared on Si wafers using the sol–gel method. Four different types of coatings with silver nanoparticles (AgNPs) were synthesized.
Felczak, A.   +6 more
core   +1 more source

SPERMICIDAL ACTIVITY OF SURFACE-ACTIVE AGENTS [PDF]

open access: yesReproduction, 1962
The spermicidal activities against human spermatozoa of a range of non-ionic, anionic and cationic surface-active agents have been determined with the method of Baker, Ransom & Tynen (1937). Although it has been concluded that surface-tension-lowering properties do not directly influence spermicidal power, the surfacetension/concentration curves of a ...
C, HARVEY, R E, STUCKEY
openaire   +2 more sources

Physicochemical studies of novel sugar fatty acid esters based on (R)-3-hydroxylated acids derived from bacterial polyhydroxyalkanoates and their potential environmental impact

open access: yesFrontiers in Bioengineering and Biotechnology, 2023
Sugar fatty acids esters are popular compounds widely used in both the nutritional, cosmetic and pharmaceutical industries due to their amphiphilic structure and consequent ability to reduce the surface tension of solutions.
Wojciech Snoch   +4 more
doaj   +1 more source

Surface active properties and biological activity of novel nonionic surfactants containing pyrimidines and related nitrogen heterocyclic ring systems

open access: yesGrasas y Aceites, 2008
A series of annelated pyrimidine derivatives has been synthesized via different heterocyclization reactions of suitably functionalized 6-(4-octadecyloxyphenyl)-4-oxo-2- thioxo-1,2,3,4-tetrahydropyrimidine-5-carbonitrile (4) with different electrophiles ...
R. El-Sayed
doaj   +1 more source

Comprehensive methodological approach to determine the toxicological characteristics of the highly dispersed rock samples [PDF]

open access: yesНанотехнологии в строительстве, 2017
A schematic diagram of the integrated approach for assessing the toxicological properties of rocks, taking into account their physicochemical properties, was proposed.
Ayzenshtadt Arkady Mikhailovich   +2 more
doaj   +1 more source

Environment-mediated structure, surface redox activity and reactivity of ceria nanoparticles [PDF]

open access: yes, 2013
Nanomaterials, with potential application as bio-medicinal agents, exploit the chemical properties of a solid, with the ability to be transported (like a molecule) to a variety of bodily compartments.
Asati   +40 more
core   +1 more source

Mechanics of active surfaces [PDF]

open access: yesPhysical Review E, 2017
We derive a fully covariant theory of the mechanics of active surfaces. This theory provides a framework for the study of active biological or chemical processes at surfaces, such as the cell cortex, the mechanics of epithelial tissues, or reconstituted active systems on surfaces.
Salbreux, G., Jülicher, F.
openaire   +4 more sources

Simulation of Radioactive Contamination of the Area by Random Additions

open access: yesСовременные информационные технологии и IT-образование, 2019
To date, nuclear energy occupies a significant place in the fuel and energy balance of the world. Despite the significant improvement in the state of nuclear and radiation safety at radiation facilities in recent years, it is impossible to completely ...
Ekaterina Moiseeva   +2 more
doaj   +1 more source

The onset of solar cycle 24: What global acoustic modes are telling us

open access: yes, 2009
We study the response of the low-degree, solar p-mode frequencies to the unusually extended minimum of solar surface activity since 2007. A total of 4768 days of observations collected by the space-based, Sun-as-a-star helioseismic GOLF instrument are ...
Beer   +22 more
core   +1 more source

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