Results 111 to 120 of about 325,267 (403)

Extraction of Traces of Copper as Tetra-Butylammonium Tetrathiocyanato Copper (II) and Its Spectrophotometric Determination Using Eriochrome Black T [PDF]

open access: yesIranian Journal of Chemistry & Chemical Engineering, 1993
An extraction-spectrophotometric method for the determination of traces of copper (II) is described. The method is based on the quantitative extraction of copper as tetrabutylammonium tetrathiocyanato copper (II) into methyl isobutyl ketone, followed by ...
Mojtaba Shamsipur, Ali Reza Fakhari
doaj  

Spectrally Engineered Coatings for Steering the Solar Photons

open access: yesAdvanced Materials, EarlyView.
Spectrum‐splitting energy synergy: a spectrally engineered radiative cooling (RC) coating with photoluminescence is integrated with bifacial photovoltaic (biPV) panels to construct a hybrid biPV‐RC system. By controlling solar photon conversion pathways and guiding light transport, the system enables synergistic power generation and daytime radiative ...
Quan Gong   +3 more
wiley   +1 more source

Ultraviolet cometary spectrophotometry [PDF]

open access: yes
During the 13 shifts dedicated to observations of Comet Bradfield (including the two European shifts), five high dispersion exposures were obtained with the LWR camera, 27 low dispersion images with the LWR camera, and 36 low dispersion images with the ...
Ahearn, M. F.
core   +1 more source

Interaction of Oligonucleotides with Gold Nanoparticles: Factors Beyond Electrostatic and Van‐Der Waals Forces

open access: yesAdvanced Materials Interfaces, EarlyView.
The formation of stable clusters of gold nanoparticles with oligonucleotides at different solution conditions is explored. DNA base homogeneity and strand directionality influence the binding with gold nanoparticles leading to interesting clustering behavior that can be relevant for SERS applications.
Shaila Thakur   +3 more
wiley   +1 more source

Techniques and Review of Absolute Flux Calibration from the Ultraviolet to the Mid-Infrared [PDF]

open access: yes, 2014
The measurement of precise absolute fluxes for stellar sources has been pursued with increased vigor since the discovery of the dark energy and the realization that its detailed understanding requires accurate spectral energy distributions (SEDs) of redshifted Ia supernovae in the rest frame.
arxiv   +1 more source

Spectrophotometry of comets [PDF]

open access: yes
Photoelectric spectrophotometric- and image tube equipped spectrographic-studies on comets are used to formulate a new model for the cometary nucleus that is physically similar to the icy-conglomerate.
Odell, C. R.
core   +1 more source

Protein‐DNA Competition at the Bio‐Nano Interface: Structural and Biological Insights From Graphene Oxide Coronas

open access: yesAdvanced Materials Interfaces, Volume 12, Issue 6, March 16, 2025.
This study explores how DNA affects protein corona formation on Graphene Oxide nanosheets in DNA‐supplemented human plasma. DNA introduction shifts the corona from protein‐dominated to a 2‐component biomolecular corona composed of proteins and DNA. Higher DNA concentration in the corona correlates with increased Toll‐like receptor 9 (TLR9) activation ...
Erica Quagliarini   +7 more
wiley   +1 more source

New bright optical spectrophotometric standards: A-type stars from the STIS Next Generation Spectral Library [PDF]

open access: yes, 2015
Exoplanets have sparked interest in extremely high signal-to-noise ratio spectroscopic observations of very bright stars, in a regime where flux calibrators, in particular DA white dwarfs, are not available. We argue that A-type stars offer a useful alternative and reliable space-based spectrophotometry is now available for a number of bright ones in ...
arxiv   +1 more source

Two-micron spectrophotometry of the galaxy NGC 253 [PDF]

open access: yes, 1979
A very strong Brackett-gamma hydrogen emission line, and the 2.3 micron CO stellar absorption feature were measured in NGC 253. The presence and strength of the CO feature indicates that late type giant stars produce most of the 2.2 micron continuum ...
Becklin, E. E.   +3 more
core   +1 more source

Non-grey dimming events of KIC 8462852 from GTC spectrophotometry [PDF]

open access: yes, 2018
We report ground-based spectrophotometry of KIC 8462852, during its first dimming events since the end of the Kepler mission. The dimmings show a clear colour-signature, and are deeper in visual blue wavelengths than in red ones.
Alonso, R.   +3 more
core   +3 more sources

Home - About - Disclaimer - Privacy