scholarly journals In situ SERS detection of dissolved nitrate on hydrated gold substrates

2021 ◽  
Author(s):  
Timo Küster ◽  
Geoffrey D. Bothun
Keyword(s):  
Statistical Analysis ◽  
Spectral Processing ◽  
Nitrate Ion ◽  
Gold Substrates ◽  
Sers Detection ◽  
Nanostructured Gold

SERS spectral processing and statistical analysis enable the ultrasensitive in situ detection of nitrate ion on nanostructured gold.

scholarly journals Statistical Analysis of the Main Ionospheric Trough Using Swarm in Situ Measurements

2020 ◽  
Vol 125 (3) ◽  
Author(s):  
Ercha Aa ◽  
Shasha Zou ◽  
Philip J. Erickson ◽  
Shun‐Rong Zhang ◽  
Siqing Liu
Keyword(s):  
Statistical Analysis ◽  
In Situ Measurements ◽  
Main Ionospheric Trough

The measurement of groundwater temperature in shallow piezometers and standpipes

2005 ◽  
Vol 42 (5) ◽  
pp. 1377-1390 ◽  
Author(s):  
Matthew D Alexander ◽  
Kerry TB MacQuarrie
Keyword(s):  
Finite Element ◽  
Statistical Analysis ◽  
Transport Model ◽  
Shallow Groundwater ◽  
Subsurface Temperature ◽  
Groundwater Temperature ◽  
Monitoring Well ◽  
Laboratory Results ◽  
The Impact

Accurate measurements of in situ groundwater temperature are important in many groundwater investigations. Temperature is often measured in the subsurface using an access tube in the form of a piezometer or monitoring well. The impact of standpipe materials on the conduction of heat into the subsurface has not previously been examined. This paper reports on the results of a laboratory experiment and a field experiment designed to determine if different standpipe materials or monitoring instrument configurations preferentially conduct heat into the shallow sub surface. Simulations with a numerical model were also conducted for comparison to the laboratory results. Statistical analysis of the laboratory results demonstrates that common standpipe materials, such as steel and polyvinylchloride (PVC), do not affect temperature in the subsurface. Simulations with a finite element flow and heat transport model also confirm that the presence of access tube materials does not affect shallow groundwater temperature measurements. Field results show that different instrument configurations, such as piezometers and water and air filled and sealed well points, do not affect subsurface temperature measurements.Key words: groundwater temperature, temperature measurement, conduction, piezometers, piezometer standpipes, thermal modelling.

Interplanetary dust observations with the Solar Orbiter RPW instrument: a first year of data.

2021 ◽  
Author(s):  
Arnaud Zaslavsky ◽  
Ingrid Mann ◽  
Stuart Bale ◽  
Andrzej Czechowski ◽  
Karine Issautier ◽  
...  
Keyword(s):  
Statistical Analysis ◽  
Interstellar Dust ◽  
Plasma Waves ◽  
Interplanetary Dust ◽  
First Year ◽  
Voltage Waveform ◽  
Dust Density ◽  
Spacecraft Trajectory ◽  
Impact Data

<p>Impacts of dust grains on spacecraft are known to produce typical impulsive signals in the voltage waveform recorded at the terminals of electric antennas. Such signals are, as could be expected, routinely detected by the radio and plasma waves (RPW) instrument aboard Solar Orbiter, therefore providing in-situ measurements of the interplanetary dust density along the spacecraft trajectory.<br><br>We present a statistical analysis of the first year and half of dust impact data recorded by Solar Orbiter RPW between 1 AU and 0.5 AU. We discuss the results in terms of constraints that can be put on beta-meteoroids and interstellar dust fluxes, and compare them to results obtained by STEREO at 1 AU and more recently by Parker Solar Probe at 0.5 AU.</p>

Photochromic dithienylethenes characterized by in situ irradiation NMR-spectroscopy and electrochemically induced responsiveness on gold substrates

2019 ◽  
Vol 7 (45) ◽  
pp. 14088-14097
Author(s):  
Jonas von Irmer ◽  
Florian Frieß ◽  
Dominik Herold ◽  
Jonas Kind ◽  
Christina M. Thiele ◽  
...  
Keyword(s):  
Cyclic Voltammetry ◽  
Nmr Spectroscopy ◽  
Self Assembled Monolayers ◽  
Gold Surfaces ◽  
Gold Substrates ◽  
Assembled Monolayers ◽  
Self Assembled

The photochromic and electrochemical switching capabilities of two dithienylethenes with different substitutions and their self-assembled monolayers on gold surfaces are characterized by in situ NMR-spectroscopy and cyclic voltammetry.

scholarly journals AlpsNMR: an R package for signal processing of fully untargeted NMR-based metabolomics

2020 ◽  
Vol 36 (9) ◽  
pp. 2943-2945 ◽  
Author(s):  
Francisco Madrid-Gambin ◽  
Sergio Oller-Moreno ◽  
Luis Fernandez ◽  
Simona Bartova ◽  
Maria Pilar Giner ◽  
...  
Keyword(s):  
Signal Processing ◽  
Statistical Analysis ◽  
Processing System ◽  
R Package ◽  
Supplementary Information ◽  
Test Case ◽  
Previous Knowledge ◽  
Spectral Processing ◽  
Computational Tools ◽  
User Friendly

Abstract Summary Nuclear magnetic resonance (NMR)-based metabolomics is widely used to obtain metabolic fingerprints of biological systems. While targeted workflows require previous knowledge of metabolites, prior to statistical analysis, untargeted approaches remain a challenge. Computational tools dealing with fully untargeted NMR-based metabolomics are still scarce or not user-friendly. Therefore, we developed AlpsNMR (Automated spectraL Processing System for NMR), an R package that provides automated and efficient signal processing for untargeted NMR metabolomics. AlpsNMR includes spectra loading, metadata handling, automated outlier detection, spectra alignment and peak-picking, integration and normalization. The resulting output can be used for further statistical analysis. AlpsNMR proved effective in detecting metabolite changes in a test case. The tool allows less experienced users to easily implement this workflow from spectra to a ready-to-use dataset in their routines. Availability and implementation The AlpsNMR R package and tutorial is freely available to download from http://github.com/sipss/AlpsNMR under the MIT license. Supplementary information Supplementary data are available at Bioinformatics online.

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