Results 121 to 130 of about 1,121,994 (368)

Perchloroethylene Analysis by Chemical Oxidation and Determination of Intermediate Products by Gas Chromatography, Mass Spectrometry

open access: yesMedical Laboratory Journal, 2014
Background and Objective: Perchloroethylene (PCE) is a chlorinated hydrocarbon used as a solvent in many industrial processes. In contaminated water and soil a great deal of PCE is found.
M Sadeghi, K Naddafi, R Nabizadeh
doaj  

Far-Ultraviolet Observations of NGC 3516 using the Hopkins Ultraviolet Telescope [PDF]

open access: yes, 1996
We observed the Seyfert 1 galaxy NGC 3516 twice during the flight of Astro-2 using the Hopkins Ultraviolet Telescope in March 1995. Simultaneous X-ray observations were performed with ASCA.
Davidsen, A. F.   +5 more
core   +3 more sources

Effects of Stratospheric Conditions on the Viability, Metabolism and Proteome of Prokaryotic Cells

open access: yesAtmosphere, 2015
The application of ultraviolet (UV) radiation to inhibit bacterial growth is based on the principle that the exposure of DNA to UV radiation results in the formation of cytotoxic lesions, leading to inactivation of microorganisms.
Dagmar Chudobova   +8 more
doaj   +1 more source

Ultraviolet microscopy aids in cytological and biomedical research [PDF]

open access: yes, 1967
Ultraviolet microscopy is used by cytologists and biochemists to study the morphological and physiological changes in the living cell under varied culture conditions.
Schlenk, F., Svihla, B.
core   +1 more source

Smart Rubber Extrusion Line Combining Multiple Sensor Techniques for AI‐Based Process Control

open access: yesAdvanced Engineering Materials, EarlyView.
This publication presents a digitalization approach for a laboratory rubber extrusion line, employing innovative measurement methods and artificial intelligence (AI)‐based process control. The results demonstrate that the measurement systems are capable of detecting changes in the process and extrudate quality.
Alexander Aschemann   +18 more
wiley   +1 more source

Atomic Layer Deposition of Lithium Fluoride Optical Coatings for the Ultraviolet

open access: yesInorganics, 2018
Lithium fluoride is an important material for ultraviolet optical systems, possessing among the largest optical bandgaps of dielectric materials. We report on the development of an atomic layer deposition (ALD) process for lithium fluoride that is ...
John Hennessy, Shouleh Nikzad
doaj   +1 more source

Ultraviolet and Infrared Divergences in Superstring Theory [PDF]

open access: yesarXiv, 2015
Superstring theory is known to be free from ultraviolet divergences but suffers from the usual infrared divergences that occur in quantum field theories. After briefly reviewing the origin of ultraviolet finiteness of superstring theory we describe recent progress towards the understanding of infrared divergences in superstring theory.
arxiv  

Titan in Transit: Ultraviolet Occultation Observations Reveal a Complex Atmospheric Structure [PDF]

open access: yesarXiv, 2020
Transit spectroscopy is a key tool for exoplanet atmospheric characterization. However, transit spectrum observations can be limited by aerosol extinction when gas opacities are weak. The ultraviolet wavelength range contains a variety of strong molecular and atomic features, potentially enabling gas species detection even when atmospheric hazes are ...
arxiv  

An Ultraviolet Redshift Survey: A New Estimate of the Local Star Formation Rate [PDF]

open access: yes, 1997
We present the first results of an ongoing spectroscopic survey of galaxies selected in the rest-frame ultraviolet. The source catalogue was constructed from a flux-limited sample of stars, galaxies and QSOs imaged at 2000 \AA with the FOCA balloon-borne camera (Milliard et al. 1992). The redshift distribution obtained for 45 galaxies spans 0
arxiv   +1 more source

A self-powered high-performance graphene/silicon ultraviolet photodetector with ultra-shallow junction: breaking the limit of silicon?

open access: yesnpj 2D Materials and Applications, 2017
We present a self-powered, high-performance graphene-enhanced ultraviolet silicon Schottky photodetector. Different from traditional transparent electrodes, such as indium tin oxides or ultra-thin metals, the unique ultraviolet absorption property of ...
X. Wan   +24 more
semanticscholar   +1 more source

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