Results 41 to 50 of about 29,331,473 (379)

The localization of the alkaloids in Coptis chinensis rhizome by time-of-flight secondary ion mass spectrometry

open access: yesFrontiers in Plant Science, 2022
BackgroundUnderstanding the spatial distribution of active compounds can effectively evaluate the quality of decoction pieces of traditional Chinese medicine (TCM).
Fan He   +12 more
doaj   +1 more source

Tandem GCIB-ToF-SIMS and GCIB-XPS analyses of the 2-mercaptobenzothiazole on brass

open access: yesnpj Materials Degradation, 2023
Surface analysis of 2-mercaptobenzothiazole (MBTH) adsorbed on brass from 3 wt.% NaCl solution was performed by means of X-ray photoelectron spectroscopy and tandem (MS/MS) time-of-flight secondary ion mass spectrometry (ToF-SIMS).
Matjaž Finšgar
doaj   +1 more source

Controlling orientation, conformation, and biorecognition of proteins on silane monolayers, conjugate polymers, and thermo-responsive polymer brushes: investigations using TOF-SIMS and principal component analysis

open access: yesColloid and Polymer Science, 2020
Control over orientation and conformation of surface-immobilized proteins, determining their biological activity, plays a critical role in biointerface engineering.
K. Gajos, K. Awsiuk, A. Budkowski
semanticscholar   +1 more source

Investigation of Kelvin probe force microscopy efficiency for the detection of hydrogen ingress by cathodic charging in an aluminium alloy [PDF]

open access: yes, 2013
Detecting and locating absorbed hydrogen in aluminium alloys is necessary for evaluating the contribution of hydrogen embrittlement to the degradation of the mechanical properties for corroded or cathodically hydrogen-charged samples.
Alexis, Joël   +5 more
core   +2 more sources

50nm-scale localization of single unmodified, isotopically enriched, proteins in cells. [PDF]

open access: yesPLoS ONE, 2013
Imaging single proteins within cells is challenging if the possibility of artefacts due to tagging or to recognition by antibodies is to be avoided. It is generally believed that the biological properties of proteins remain unaltered when (14)N isotopes ...
Anthony Delaune   +8 more
doaj   +1 more source

Multivariate analysis of 3D ToF-SIMS images: method validation and application to cultured neuronal networks.

open access: yesIn Analysis, 2016
Advanced data analysis tools are crucial for the application of ToF-SIMS analysis to biological samples. Here, we demonstrate that by using a training set approach principal components analysis (PCA) can be performed on large 3D ToF-SIMS images of ...
S. V. Nuffel   +4 more
semanticscholar   +1 more source

Composition depth profile analysis of electrodeposited alloys and metal multilayers: the reverse approach [PDF]

open access: yes, 2011
The reverse depth profile analysis is a recently developed method for the study of a deposit composition profile in the near-substrate zone. The sample preparation technique enables one to separate the deposit and a thin cover layer from its substrate ...
Bartók, András   +5 more
core   +1 more source

Spiralling Inverse Method (SIM): A new inverse method to estimate ocean mixing

open access: yes, 2023
Ocean mixing affects the uptake, transport and storage of tracers such as heat and carbon in the ocean, subsequently impacting the climate and its future changes. Ocean mixing is caused by many different physical processes that take place on a large range of spatiotemporal scales.
Kusters, N.   +2 more
openaire   +2 more sources

Time after time – circadian clocks through the lens of oscillator theory

open access: yesFEBS Letters, EarlyView.
Oscillator theory bridges physics and circadian biology. Damped oscillators require external drivers, while limit cycles emerge from delayed feedback and nonlinearities. Coupling enables tissue‐level coherence, and entrainment aligns internal clocks with environmental cues.
Marta del Olmo   +2 more
wiley   +1 more source

Large Molecular Cluster Formation from Liquid Materials and Its Application to ToF-SIMS

open access: yesQuantum Beam Science, 2021
Since molecular cluster ion beams are expected to have various chemical effects, they are promising candidates for improving the secondary ion yield of Tof-SIMS.
Kousuke Moritani   +4 more
doaj   +1 more source

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