Results 161 to 170 of about 5,701,527 (195)

Tissue uorophores and their spectroscopic characteristics

2014
Natural tissue autofluorescence (AF) originates primarily from specific endogenous fluorophores located in mitochondria (NAD(P)H and flavin coenzymes, porphyrins, and lipopigments), structural proteins in extracellular matrix (ECM; collagen and elastin), cell lysosomes (lipofuscins), and various aromatic amino acids appearing in many proteins within
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Spectroscopic characteristics of Sm3+-doped alkali fluorophosphate glasses

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2006
Optical absorption, luminescence and lifetime measurements of Sm(3+)-doped alkali fluorophosphate glasses with molar compositions of 50(NaPO(3))(6)+10TeO(2)+20AlF(3)+19RF+1Sm(2)O(3) (R=Li, Na and K) are described. The variation of optical properties with glass composition plays a dominant role in the determination of efficient laser materials. From the
M, Jayasimhadri, L R, Moorthy, S A, Saleem, R V S S N, Ravikumar   +3 more
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SPECTROSCOPIC AND MICROSCOPIC CHARACTERISTICS OF HUMAN SKIN AUTOFLUORESCENCE EMISSION

Photochemistry and Photobiology, 1995
AbstractTo improve the understanding of human skin autofluorescence emission, the spectroscopic and microscopic characteristics of skin autofluorescence were studied using a combined fluorescence and reflectance spectroanalyzer and a fiber optic microspectrophotometer.
H, Zeng, C, MacAulay, D I, McLean, B, Palcic   +3 more
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Structure and spectroscopic characteristics of 4-tert-butylphenoxyacetylhydrazones of arylaldehydes

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2007
By reaction of 4-tert-butylphenoxyacetylhydrazide with aromatic aldehydes and acetone a new series of 4-tert-butylphenoxyacetylhydrazones was synthesized. The structural peculiarities of the investigated molecules have been determined by means of X-ray analysis and IR spectroscopy.
S N, Podyachev, I A, Litvinov, R R, Shagidullin, B I, Buzykin, I, Bauer, D V, Osyanina, L V, Avvakumova, S N, Sudakova, W D, Habicher, A I, Konovalov   +9 more
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Characteristic and spectroscopic properties of the Schiff-base model compounds

Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2009
Two series of conjugated aromatic imines (Schiff-base model compounds) with different central groups and various side-group substitutions have been synthesized and characterized by elemental analysis, differential scanning calorimetry (DSC) technique, hydrogen nuclear magnetic resonance ((1)H NMR), Fourier transform infrared (FTIR) and ultra-violet and
B, Jarzabek, B, Kaczmarczyk, D, Sek
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Spectroscopic and Laser Characteristics of Neodymium-doped Calcium Fluorophosphate

Applied Optics, 1968
Laser oscillations have been produced in large crystals of Nd(3+)-doped Ca(5)(PO(4))(3)F (the mineral fluorapatite, whence the coined name FAP) at room temperature under both tungsten lamp and flash lamp excitation. The laser tests show that FAP:Nd crystals have four times greater gain per incident pump energy and over one and a half times greater ...
R C, Ohlmann, K B, Steinbruegge, R, Mazelsky   +2 more
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Characteristics of the Spectroscopic Binaries in the Halo of the Galaxy

Publications of the Astronomical Society of the Pacific, 1992
This thesis presents the analysis of high-resolution, low-signal-to-noise spectroscopic observaitons of a kinematically selected group of about 1300 F-, G-, and K-type dwarfs with proper motions larger than 0.26" per year. The sample includes a significant fraction of stars from the halo of our Galaxy, and the main goal is to characterize the ...
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Growth and spectroscopic characteristics of Yb:LPS single crystal

Journal of Crystal Growth, 2007
For the first time, a high optical quality Yb3+-doped lutetium pyrosilicate laser crystal Lu2Si2O7 (LPS) was grown by the Czochralski (Cz) method. The segregation coefficient of ytterbium ion in Yb:LPS crystal detected by the inductively coupled plasma atomic emission spectrometer (TCP-AES) method is equal to 0.847.
Lihe Zheng, Guangjun Zhao, Chengfeng Yan, Gang Yao, Xiaodong Xu, Liangbi Su, Jun Xu   +6 more
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SPECTROSCOPIC CHARACTERISTICS OF COUMARIN 540 A IN SOL-GEL

Spectroscopy Letters, 2001
The present paper deals with the spectroscopic study of coumarin 540 A in sol-gel and other liquid solvents in the 190–500 nm wavelength region. The electronic absorption spectra are compared with coumarin and its parent aromatic molecule anthracene. Theoretically, ground state geometries are optimized using the MNDO molecular orbital method.
Asma Sohail Farooqui, Z. H. Zaidi
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Spectroscopic characteristics of the Nd3+ ions in garnet crystals

Journal of Luminescence, 2012
Abstract The article deals with the research of oscillator strengths and the Ωt (t=2,4,6) intensity parameters of Nd3+ doped garnet crystals. It has been found that the absorption intensity of the 4I9/2→4G5/2, 2G7/2 hypersensitive transition in the Ca3(NbGa)5O12 crystals doped with Nd3+ is considerably higher than the corresponding values in the ...
Polina A. Ryabochkina, Evgeniya V. Bolshakova, Sergey N. Ushakov, Alexander V. Malov, Konstantin N. Nishchev   +4 more
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