Results 21 to 30 of about 881,282 (301)

Metallicities of Classical Cepheids in the Inner Galactic Disk

open access: yesThe Astrophysical Journal, 2023
Metallicity gradients refer to the sloped radial profiles of the metallicities of gas and stars and are commonly seen in disk galaxies. A well-defined metallicity gradient of the Galactic disk is observed particularly well with classical Cepheids, which ...
Noriyuki Matsunaga   +16 more
doaj   +1 more source

Near-infrared spectroscopy after high-risk congenital heart surgery in the paediatric intensive care unit [PDF]

open access: yes, 2011
Objective: To establish whether the use of near-infrared spectroscopy is potentially beneficial in high-risk cardiac infants in United Kingdom paediatric intensive care units. Design: A prospective observational pilot study.
Hovarth   +5 more
core   +1 more source

Quantitative macromolecular patterns in phytoplankton communities resolved at the taxonomical level by single-cell Synchrotron FTIR-spectroscopy

open access: yesBMC Plant Biology, 2019
Background Technical limitations regarding bulk analysis of phytoplankton biomass limit our comprehension of carbon fluxes in natural populations and, therefore, of carbon, nutrients and energy cycling in aquatic ecosystems.
Andrea Fanesi   +4 more
doaj   +1 more source

Infrared Spectroscopy—Mid-infrared, Near-infrared, and Far-infrared/Terahertz Spectroscopy

open access: yesAnalytical Sciences, 2021
This article aims to overview infrared (IR) spectroscopy. Simultaneously, it outlines mid-infrared (MIR), near-infrared (NIR), and far-infrared (FIR) or terahertz (THz) spectroscopy separately, and compares them in terms of principles, characteristics, advantages, and applications.
openaire   +3 more sources

An investigation of the RWPE prostate derived family of cell lines using FTIR spectroscopy [PDF]

open access: yes, 2010
Interest in developing robust, quicker and easier diagnostic tests for cancer has lead to an increased use of Fourier transform infrared (FTIR) spectroscopy to meet that need.
Baker   +34 more
core   +3 more sources

Mid-infrared cross-comb spectroscopy

open access: yesNature Communications, 2023
The authors introduce and demonstrate cross-comb spectroscopy in the mid-infrared as a variant of dual-comb spectroscopy. It provides enhanced performance and allows mid-infrared spectral information to be obtained by near-infrared detection.
Mingchen Liu   +5 more
doaj   +1 more source

Selective Enhancement of Photoresponse with Ferroelectric‐Controlled BP/In2Se3 vdW Heterojunction

open access: yesAdvanced Science, 2023
Owing to the large built‐in field for efficient charge separation, heterostructures facilitate the simultaneous realization of a low dark current and high photocurrent.
Jian Wang   +13 more
doaj   +1 more source

Monitoring Detrusor Oxygenation and Hemodynamics Noninvasively during Dysfunctional Voiding

open access: yesAdvances in Urology, 2012
The current literature indicates that lower urinary tract symptoms (LUTSs) related to benign prostatic hyperplasia (BPH) have a heterogeneous pathophysiology. Pressure flow studies (UDSs) remain the gold standard evaluation methodology for such patients.
Andrew J. Macnab   +2 more
doaj   +1 more source

Ultrabroadband Tellurium Photoelectric Detector from Visible to Millimeter Wave

open access: yesAdvanced Science, 2022
Ultrabroadband photodetection is of great significance in numerous cutting‐edge technologies including imaging, communications, and medicine. However, since photon detectors are selective in wavelength and thermal detectors are slow in response ...
Wanli Ma   +10 more
doaj   +1 more source

On-chip mid-infrared photothermal spectroscopy using suspended silicon-on-insulator microring resonators [PDF]

open access: yes, 2016
Mid-infrared spectroscopic techniques rely on the specific "fingerprint" absorption lines of molecules in the mid-infrared band to detect the presence and concentration of these molecules.
Baets, Roel   +5 more
core   +3 more sources

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