Results 21 to 30 of about 375,783 (265)

Absorption Properties of Polyvinyl Alcohol Films Filled with Nanoparticles Doped with Acridine Orange Dye

open access: yesAl-Mustansiriyah Journal of Science, 2022
Polyvinyl Alcohol (PVA) polymer/ Acridine Orange (AO) dye films prepared via casting technique at room temperature. The effect of adding (Acridine Orange (AO) dye solution, Magnesium Oxide (MgO), and Aluminum Oxide (Al2O3) NPs) to the PVA polymer matrix ...
Fairooz Faeq Kareem   +2 more
doaj   +1 more source

The influence of external factors on the accuracy of non-invasive measuring of oxygen in blood

open access: yesRegulatory Mechanisms in Biosystems, 2016
In this paper we investigated a pulse oximetry-based method for mobile devices. This method obtains bio-signals related to blood pulsation in transparent parts of body. The most widely accepted field for use of this method is hospital care.
Y. M. Snizhko, V. M. Sarana
doaj   +1 more source

Quantity and Quality of Light on Growth and Pigment Content of Dunaliella sp. and Anabaena sp. Cultures and the Use of Their Absorption Spectra as a Proxy Method for Assessment

open access: yesJournal of Marine Science and Engineering, 2023
(1) Background: As microalgae cultures are affected by the quantity and quality of light, I explored this for two species. Additionally, I introduced a novel easy and economical way for the growers to easily and economically ascertain continuously with ...
George N. Hotos
doaj   +1 more source

Segment-Resolved Gas Concentration Measurements by a Time Domain Multiplexed Dual Comb Method

open access: yesSensors, 2020
Locating gas concentration changes in widespread locations can be conducive to environmental atmospheric detection, gas emissions monitoring, production process control, etc.
Xinyi Chen   +5 more
doaj   +1 more source

The solution absorption spectrum of Cf3+ [PDF]

open access: yesJournal of Inorganic and Nuclear Chemistry, 1966
Author(s): Gonway, J.G.; Fried, S.; Latimer, R.M.; Mclaughlin, R.; Gutmacher, R.G.; Carnall, W.T.; Fields, P.
Gonway, J.G.   +6 more
openaire   +2 more sources

The Effect of the Core on the Absorption in a Hybrid Semiconductor Quantum Dot—Metal Nanoshell System

open access: yesApplied Sciences, 2023
We examine the optical absorption in a hybrid structure composed of a metal nanoshell and a semiconductor quantum dot, while interacting with a linearly polarized probe electromagnetic field. First, we derive the equations of motion, in the rotating wave
Spyridon G. Kosionis   +2 more
doaj   +1 more source

THE ABSORPTION SPECTRUM OF VISUAL PURPLE [PDF]

open access: yesJournal of General Physiology, 1938
The absorption spectra of visual purple solutions extracted by various means were measured with a sensitive photoelectric spectrophotometer and compared with the classical visual purple absorption spectrum. Hardening the retinas in alum before extraction yielded visual purple solutions of much higher light transmission in the blue and ...
A M, Chase, C, Haig
openaire   +2 more sources

Design of a Measuring Device and Experimental Study into the Relationship between Temperature and the Density of Alkali Metal-Vapor

open access: yesPhotonics, 2023
The temperature of the alkali metal cell, which affects the density of the alkali-metal vapor and the gas pressure, is usually difficult to measure directly.
Huining Shang   +6 more
doaj   +1 more source

Spectral-Luminescent Properties of ZrO2-Y2O3-Pr2O3 Crystals

open access: yesCrystals, 2022
We studied the spectral-luminescent properties of (ZrO2)0.805(Y2O3)0.188(Pr2O3)0.007 and (ZrO2)0.802(Y2O3)0.195(Pr2O3)0.003 crystals grown by directional melt crystallization in a cold skull.
Mikhail Borik   +7 more
doaj   +1 more source

On the absorption spectrum of noble gases at the arc spectrum limit [PDF]

open access: yesJournal of Research of the National Institute of Standards and Technology, 2005
Rydberg spectral lines of an atom are sometimes superimposed on the continuous spectrum of a different configuration. Effects of interaction among different configurations in one of these cases are theoretically investigated, and a formula is obtained that describes the behavior of absorption spectrum intensity. This offers qualitative justification of
Fano, Ugo   +3 more
openaire   +2 more sources

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