نتایج جستجو برای: visible and ultraviolet spectrometers

تعداد نتایج: 16844006  

Journal: :Progress in Biophysics and Biophysical Chemistry 1953

2008
Martha S. Gilmore Benjamin Bornstein Matthew D. Merrill Rebecca Castaño James P. Greenwood

We have developed two automated detectors that can recognize the sulfate mineral jarosite in unknown visible to near-infrared spectra (350– 2500 nm). The two detectors are optimized for use within the terrestrial and martian atmospheres. The detectors are built from Support Vector Machines trained using a generative model to create linear mixtures of library mineral spectra. Both detectors perf...

Journal: :kuwait journal of science 2021

Efficient energy storage systems are recharged from the nano batteries; however, available of present nanomaterial batteries remains capable for many applications due to limited basic charging capacity electrode materials. A cadmium sulfide (CdS) nanocrystal (NCs) or quantum dots (QDs) that was prepared by chemical reaction and were fabricated battery device using PVV / Li: graphite CdS Al. The...

Journal: :Astronomy and Astrophysics 2021

Context. The Solar Orbiter mission, with an orbit outside the Sun-Earth line and leaving ecliptic plane, opens up opportunities for combined analysis of measurements obtained by solar imagers spectrometers. For first time different space spectrometers will be located at wide angles to each other, allowing three-dimensional (3D) spectroscopy atmosphere. Aims. aim this work is prepare a methodolo...

Journal: :The Journal of General Physiology 1972
Robert D. DeVoe

Intracellular recordings have been made from visual cells in principal and secondary eyes of in vitro wolf spider preparations. The responses of all cells to all wavelengths of light were graded depolarizations; no hyperpolarizations or nerve discharges were seen. Cells in a secondary eye, the anterior lateral eye, had a maximum sensitivity in the visible at 510 nm and a secondary maximum, or s...

Journal: :The Journal of General Physiology 1961
Arthur C. Giese Molly Lusignan

Regeneration of Blepharisma undulans variety japonicus from which the hypostome has been removed is retarded by dosages of 3000 to 4600 ergs/mm.(2) at wavelength 2654A most strongly when the fragment is exposed soon after cutting. Dosages greater than 4600 ergs/mm.(2) prevent regeneration. Regeneration is also retarded strongly when the Blepharisma are cut soon after irradiation. Starvation ret...

1997
David H. Cohen Joseph P. Cassinelli

We report on EUV spectroscopic observations of the B bright giant ǫ CMa made during the ORFEUS-SPAS II mission. We assess the performance of the instrument in the EUV and find that the effective area is roughly three times that of the EUVE long wavelength spectrometer and that the spectral resolution is λ/∆λ ≈ 1250. We identify most of the features, qualitatively compare different models, and e...

2009
Giuseppe Maino

The application of multispectral nondestructive techniques initially developed in the field of materials science to art and archaeological objects provides the art historian or the archaeologist reliable qualitative and often quantitative information. By this way, it is possible to understand, for instance, the technical and intellectual know-how of the artists or craftsmen of the period under ...

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