Results 21 to 30 of about 22,003 (164)

In situ Chemical Profiling and Imaging of Cultured and Natural Cordyceps sinensis by TOF-SIMS

open access: yesFrontiers in Chemistry, 2022
Time-of-flight secondary ion mass spectrometry (TOF-SIMS) is a sensitive surface analytical technology, which can simultaneously acquire diverse chemical components and their precise locations on the surfaces of samples without any requirements for ...
Qian-Bao Liu   +9 more
doaj   +1 more source

Temperature control on high-resolution SIMS oxygen isotopic compositions in Porites coral skeletons

open access: yesSolid Earth Sciences, 2021
Oxygen isotope composition (δ18O) in Porites coral skeletons at the micrometer scale has been proposed to be uninfluenced by temperature in previous studies.
Jieqiong Zou   +10 more
doaj   +1 more source

Method for assessing the spatiotemporal resolution of structured illumination microscopy (SIM)

open access: yesBiomedical Optics Express, 2021
A method is proposed for assessing the temporal resolution of structured illumination microscopy (SIM), by tracking the amplitude of different spatial frequency components over time, and comparing them to a temporally-oscillating ground-truth. This method is used to gain insight into the performance limits of SIM, along with alternative reconstruction ...
Boualam, A, Rowlands, C
openaire   +5 more sources

Reducing the matrix effect in mass spectral imaging of biofilms using flow-cell culture

open access: yesFrontiers in Chemistry, 2023
The interactions between soil microorganisms and soil minerals play a crucial role in the formation and evolution of minerals and the stability of soil aggregates.
Yuchen Zhang   +6 more
doaj   +1 more source

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

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

Soil-structure interaction methods, SIM code. Volume III [PDF]

open access: yes, 1979
The Structure In Media (SIM) Code determines the response of a structure, embedded in soil/rock media, to a specified dynamic disturbance in the media. The structure is modeled as a series of lumped mass, elastic beams which may be interconnected with elastic springs. The disturbance in the free field is specified in terms of an accelerogram, the scale
Miller, C. A., Costantino, C. J.
openaire   +2 more sources

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

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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