Results 31 to 40 of about 30,742,917 (357)

An Investigation Into the Electrical Activity of Tender, Resting Paraspinal Muscles Using Surface Electromyography: A Pilot Study [PDF]

open access: yes, 2002
Abnormal resting paraspinal muscle activity has been claimed to be responsible for changes in spinal tissue texture which are detectible by manual palpation.
Fryer, Gary, Hubbard, A, Ball, Kevin
core   +1 more source

A predictive surface profile model for turning based on spectral analysis [PDF]

open access: yes, 2013
This article presents a predictive approach of surface topography based on the FFT analysis of surface profiles. From a set of experimental machining tests, the parameters investigated are: feed per revolution, insert nose radius, depth of cut and ...
COSTES, Jean-Philippe
core   +1 more source

Green Glucamine-Based Trisiloxane Surfactant: Surface Activity, Aggregate Behavior, and Superspreading on Hydrophobic Surfaces

open access: yesACS Sustainable Chemistry and Engineering, 2019
A novel green glucamine-based trisiloxane surfactant (HAG) composed of a glucamine headgroup and trisiloxane tail was prepared by a completely “green” synthesis. Its chemical constitution, functional groups, and surroundings were characterized by Fourier
Jinxing Li   +4 more
semanticscholar   +1 more source

Effect of Size, Shape and Surface Functionalization on the Antibacterial Activity of Silver Nanoparticles

open access: yesJournal of Functional Biomaterials, 2023
Silver nanoparticles (AgNPs) are the most investigated antibacterial agents against multidrug resistant (MDR) pathogens. They can lead to cellular death by means of different mechanisms, damaging several cell compartments, from the external membrane, to ...
Arianna Menichetti   +3 more
semanticscholar   +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

The Role of Electrostatic Repulsion on Increasing Surface Activity of Anionic Surfactants in the Presence of Hydrophilic Silica Nanoparticles

open access: yesScientific Reports, 2018
Hydrophilic silica nanoparticles alone are not surface active. They, however, develop a strong electrostatic interaction with ionic surfactants and consequently affect their surface behavior.
H. Vatanparast   +4 more
semanticscholar   +1 more source

Preparation and surface activity study of amino acid surfactants

open access: yesComptes rendus. Chimie, 2019
Quaternary ammonium cationic surfactants are widely applied in many different fields, such as textile, cosmetic, and petrochemical industries. However, little research has been done on the effects of anion on cationic surfactants.
Gang Chen   +7 more
semanticscholar   +1 more source

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

Soybean-Oil-Based CO2-Switchable Surfactants with Multiple Heads

open access: yesMolecules, 2021
Oligomeric surfactants display the novel properties of low surface activity, low critical micellar concentration and enhanced viscosity, but no CO2 switchable oligomeric surfactants have been developed so far. The introduction of CO2 can convert tertiary
Huiyu Huang   +3 more
doaj   +1 more source

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