Results 21 to 30 of about 253,971 (308)

Application of terahertz spectroscopy to the characterization of biological samples using birefringence silicon grating [PDF]

open access: yes, 2012
We present a device and method for performing vector transmission spectroscopy on biological specimens at terahertz (THz) frequencies. The device consists of artificial dielectric birefringence obtained from silicon microfluidic grating structures. The
Saha, S.C.   +3 more
core   +1 more source

Three-dimensional Analyses of Geological Materials on Nanoscale by Electron Tomography

open access: yes, 2022
Electron tomography (ET), an electron-microscopy-based technique that provides three-dimensional (3D) structural information from a tilt series of two-dimensional (2D) projections, has promoted the in-depth investigation of biological molecules in ...
Wu, Xiao   +10 more
core   +1 more source

Evaluating preservation methods for identifying Anopheles gambiae s.s. and Anopheles arabiensis complex mosquitoes species using near infra-red spectroscopy. [PDF]

open access: yes, 2015
BACKGROUND: Near-infrared spectroscopy (NIRS) has been successfully used on fresh and RNAlater-preserved members of the Anopheles gambiae complex to identify sibling species and age.
Marta Ferreira Maia   +17 more
core   +1 more source

Transmission versus reflectance spectroscopy for quantitation [PDF]

open access: yesJournal of Biomedical Optics, 2018
The objective of this work was to compare the accuracy of analyte concentration estimation when using transmission versus diffuse reflectance spectroscopy of a scattering medium. Monte Carlo ray tracing of light through the medium was used in conjunction with pure component absorption spectra and Beer-Lambert absorption along each ray's pathlength to ...
openaire   +2 more sources

Narrow band transmission spectroscopy

open access: yes, 2021
Lecture on detection of exoplanet atmospheres from narrowband single transition line spectroscopy.
Casasayas Barris, N., Seidel, J.
openaire   +3 more sources

Constraining Exoplanet Mass from Transmission Spectroscopy [PDF]

open access: yesScience, 2013
Weighing Up Exoplanets The mass of a planet is important to know, but it is difficult to determine for an exoplanet. If a transmission spectrum of an exoplanet is available, de Wit and Seager (p. 1473 ) show that it is possible to determine its mass based on the properties of its ...
de Wit, Julien, Seager, Sara
openaire   +4 more sources

High-resolution Transmission Spectroscopy of the Terrestrial Exoplanet GJ 486b

open access: yesThe Astronomical Journal, 2023
Terrestrial exoplanets orbiting M-dwarf stars are promising targets for transmission spectroscopy with existing or near-future instrumentation. The atmospheric composition of such rocky planets remains an open question, especially given the high X-ray ...
Andrew Ridden-Harper   +13 more
doaj   +1 more source

Recent advancements of EC-QCL based mid-IR transmission spectroscopy of proteins and application to analysis of bovine milk [PDF]

open access: yes, 2018
Background:High emission powers of external cavity-quantum cascade laser (EC-QCL) light sources allow to employ significantly larger path lengths for infrared (IR) transmission measurements compared to conventional Fourier-transform infrared (FTIR ...
Andreas Schwaighofer   +8 more
core   +1 more source

Real-Time Cell Gap Estimation in LC-Filled Devices Using Lightweight Neural Networks for Edge Deployment

open access: yesNanomaterials
Accurate determination of the liquid crystal (LC) cell gap after filling is essential for ensuring device performance in LC-based optical applications. However, the introduction of birefringent materials significantly distorts the transmission spectrum ...
Chi-Yen Huang   +7 more
doaj   +1 more source

Online Detection of Dry Matter in Potatoes Based on Visible Near-Infrared Transmission Spectroscopy Combined with 1D-CNN

open access: yesAgriculture
More efficient resource utilization and increased crop utilization rate are needed to address the growing demand for food. The efficient quality testing of key agricultural products such as potatoes, especially the rapid testing of key nutritional ...
Yalin Guo   +7 more
doaj   +1 more source

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