Results 21 to 30 of about 75,094 (189)

Effect and mechanism of organic depressant on the hydrophobicity of chalcopyrite and pyrite under weakly alkaline environment

open access: yesJournal of Materials Research and Technology, 2021
In a chalcopyrite and pyrite flotation system, the effect and mechanism of organic depressant sodium dimethyl dithiocarbamate on the hydrophobicity of chalcopyrite and pyrite were studied.
Xu Bai, Jian Liu, Shuming Wen, Yilin Lin
doaj   +1 more source

Effect of benzotriazole on the existing pits of copper tube in fire sprinkler system

open access: yesHeliyon, 2023
In this paper, two leaking tubes were investigated among copper tubes injected with 200 and 400 ppm benzotriazole after 8 years of usage. The electrochemical tests were conducted in simulated pit-out and pit-in environments (i.e., regions outside and ...
Eun-Ha Park, Sang-Jin Ko, Jung-Gu Kim
doaj   +1 more source

Spatiotemporal lipid profiling during early embryo development of Xenopus laevis using dynamic ToF-SIMS imaging

open access: yesJournal of Lipid Research, 2014
Time-of-flight secondary ion mass spectrometry (ToF-SIMS) imaging has been used for the direct analysis of single intact Xenopus laevis embryo surfaces, locating multiple lipids during fertilization and the early embryo development stages with ...
Hua Tian   +6 more
doaj   +1 more source

Discrimination of prostate cancer cells and non-malignant cells using secondary ion mass spectrometry [PDF]

open access: yes, 2008
This communication utilises Time-of-Flight Secondary Ion Mass Spectrometry (ToF-SIMS) combined with multivariate analysis to obtain spectra from the surfaces of three closely related cell lines allowing their discrimination based upon mass spectral ...
Baker, Matthew James   +5 more
core   +1 more source

Machine-learning-enhanced time-of-flight mass spectrometry analysis

open access: yesPatterns, 2021
Summary: Mass spectrometry is a widespread approach used to work out what the constituents of a material are. Atoms and molecules are removed from the material and collected, and subsequently, a critical step is to infer their correct identities based on
Ye Wei   +10 more
doaj   +1 more source

Time-of-Flight Secondary Ion Mass Spectrometry [PDF]

open access: yesMicroscopy Today, 2011
The properties of many modern products are not only governed by their surface morphology and structure but also by their surface chemistry. For example, in some cases a contamination of less than a monolayer of molecules can be responsible for the failure of a coating with all its consequences (aesthetics, protection, life time, and so on). Other areas
openaire   +1 more source

Surface enhancement of oxygen exchange and diffusion in the ionic conductor La2Mo2O9 [PDF]

open access: yes, 2010
Isotopic surface oxygen exchange and its subsequent diffusion have been measured using secondary ion mass spectrometry in the fast ionic conductor La2Mo2O9.
Chater, R. J.   +4 more
core   +1 more source

Gas-Phase Lubrication of ta-C by Glycerol and Hydrogen Peroxide. Experimental and Computer Modeling [PDF]

open access: yes, 2010
Tetrahedrally coordinated hydrogen-free amorphous diamond-like carbon coating (denoted as ta-C) presents ultralow friction under boundary lubrication conditions at 80 °C in presence of OH-containing molecules.
De Barros Bouchet, Maria-Isabel   +6 more
core   +1 more source

COSIMA data analysis using multivariate techniques [PDF]

open access: yesGeoscientific Instrumentation, Methods and Data Systems, 2015
We describe how to use multivariate analysis of complex TOF-SIMS (time-of-flight secondary ion mass spectrometry) spectra by introducing the method of random projections.
J. Silén   +6 more
doaj   +1 more source

Ultrafast carrier dynamics on Si surfaces studied by femtosecond time-resolved two-photon photoelectron spectroscopy [PDF]

open access: yes, 2010
Secondary Ion Mass spectrometry (SIMS) has been generally used in the field of material sciences. In recent years, it has also been applied for molecular imaging of biological samples.
Aoki, T   +7 more
core   +1 more source

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