Results 21 to 30 of about 1,058,705 (300)

UV/VIS-Spectroscopic Inline Measurement for the Detection of Fouling Processes during the Polymerization of N-Vinylpyrrolidone

Reactions, 2023
With the goal to better process the monitoring of occurring fouling, a backscatter probe was developed to perform in-line measurements in a half-shell reactor during the reaction of N-vinylpyrrolidone (NVP) to polyvinylpyrrolidone (PVP).
Erik Spoor, Stefan Welzel, Ulrich Nieken, Matthias Rädle   +3 more
doaj   +1 more source

Feasibility Study for a Chemical Process Particle Size Characterization System for Explosive Environments Using Low Laser Power

Micromachines, 2020
The industrial particle sensor market lacks simple, easy to use, low cost yet robust, safe and fast response solutions. Towards development of such a sensor, for in-line use in micro channels under continuous flow conditions, this work introduces static ...
Jesse Ross-Jones, Tobias Teumer, Susann Wunsch, Lukas Petri, Hermann Nirschl, Mathias J. Krause, Frank-Jürgen Methner, Matthias Rädle   +7 more
doaj   +1 more source

Thermal accommodation in nanoporous silica for vacuum insulation panels

International Journal of Thermofluids, 2020
The thermal accommodation coefficient is a measure for the quality of thermal energy exchange between gas molecules and a solid surface. It is an important parameter to describe heat flow in rarefied gases, for example, in aerospace or vacuum technology.
S. Sonnick, M. Meier, G. Ünsal-Peter, L. Erlbeck, H. Nirschl, M. Rädle   +5 more
doaj   +1 more source

Design and construction of electron impact ion source controller for Mass spectrometer system [PDF]

مجله علوم و فنون هسته‌ای, 2023
The resolution of a mass spectrometer is dependent directly on the strength of the output ion and its energy. The number of produced ions depends on the current and the energy of the electron beam.
H.R. Ansari, A. Zolfaghari, A.H. Feghhi
doaj   +1 more source

Influence of Refractive Index Differences on the Signal Strength for Raman-Spectroscopic Measurements of Double Emulsion Droplets

Applied Sciences, 2022
Double emulsions show great potential for encapsulating active substances and protecting them against external influences. However, they tend to become unstable during storage.
Thomas Hufnagel, Matthias Rädle, Heike P. Karbstein   +2 more
doaj   +1 more source

White Dwarf Rotation as a Function of Mass and a Dichotomy of Mode Linewidths: Kepler Observations of 27 Pulsating DA White Dwarfs Through K2 Campaign 8 [PDF]

, 2017
We present photometry and spectroscopy for 27 pulsating hydrogen-atmosphere white dwarfs (DAVs, a.k.a. ZZ Ceti stars) observed by the Kepler space telescope up to K2 Campaign 8, an extensive compilation of observations with unprecedented duration (>75 ...
Bell, Keaton J., Chote, P., Clemens, J. C., Dennihy, E., Dunlap, B. H., Fanale, S. M., Fuchs, J. T., Fusillo, Nicola Pietro Gentile, Gaensicke, B. T., Greiss, S., Hermes, J. J., Kawaler, Steven D., Marsh, T. R., Montgomery, M. H., Raddi, R., Redfield, S., Tremblay, P. -E., Winget, D. E.   +17 more
core   +2 more sources

High-Sensitivity Measurement of 3He-4He Isotopic Ratios for Ultracold Neutron Experiments [PDF]

, 2015
Research efforts ranging from studies of solid helium to searches for a neutron electric dipole moment require isotopically purified helium with a ratio of 3He to 4He at levels below that which can be measured using traditional mass spectroscopy ...
Abrams, N., Bauder, W., Deibel, C. M., Huber, M. G., Huffer, C. R., Huffman, P. R., Janssens, R., Jiang, C. L., Mumm, H. P., O'Shaughnessy, C. M., Pardo, R. C., Paul, M., Rehm, K. E., Schelhammer, K. W., Scott, R. H., Swank, C. M., Vondrasek, R., Yang, L.   +17 more
core   +3 more sources

The Mu-MASS (MuoniuM lAser SpectroScopy) experiment

, 2018
We present a new experiment, Mu-MASS, aiming for a 1000-fold improvement in the determination of the 1S-2S transition frequency of Muonium (M), the positive-muon/electron bound state.
Crivelli, P.
core   +1 more source

Baryon Spectroscopy and the Origin of Mass

, 2010
The proton mass arises from spontaneous breaking of chiral symmetry and the formation of constituent quarks. Their dynamics cannot be tested by proton tomography but only by studying excited baryons. However, the number of excited baryons is much smaller
Klempt, Eberhard
core   +1 more source

Controlling the effective mass of quantum well states in Pb/Si(111) by interface engineering [PDF]

, 2010
The in-plane effective mass of quantum well states in thin Pb films on a Bi reconstructed Si(111) surface is studied by angle-resolved photoemission spectroscopy.
Bartosz Slomski, Fabian Meier, G. Ertl, J. Hugo Dil, J. J. Yeh, Jürg Osterwalder   +5 more
core   +1 more source