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Energy transfer assisted frequency upconversion in Ho 3+ doped fluoroindate glass
(2002-02-01)
Experimental results are reported which show a strong evidence of energy transfer between Ho 3+ ions in a fluoroindate glass excited by a pulsed laser operating at 640 nm. We identified the origin of the blue and green ...
Dynamics of energy transfer and frequency upconversion in Tm3+ doped fluoroindate glass
(2004-09-01)
The spectroscopic properties of Tm3+-doped fluoroindate glasses (FIG) were described by single wavelength pumping in the red region. The Judd-Ofelt (J-O) theory was used to obtain the quantum efficiency of the 4f-4f ...
Pulse train fluorescence technique for measuring triplet state dynamics
(OPTICAL SOC AMER, 2011)
We report on a method to study the dynamics of triplet formation based on the fluorescence signal produced by a pulse train. Basically, the pulse train acts as sequential pump-probe pulses that precisely map the excited-state ...
Experimental approaches and computational modeling of rat serum albumin and its interaction with piperine
(2019-06-02)
The bioactive piperine (1-piperoyl piperidine) compound found in some pepper species (Piper nigrum linn and Piper sarmentosum Roxb) has been shown to have therapeutic properties and to be useful for well-being. The tests ...
Thermoplasmonic ssDNA Dynamic Release from Gold Nanoparticles Examined with Advanced Fluorescence Microscopy
(American Chemical Society, 2015-03-22)
Plasmon excitation of spherical gold nanoparticles carrying a fluorescent labeled 30 bp dsDNA cargo, with one chain covalently attached through two S–Au bonds to the surface, results in release of the complementary strand ...
Evolutionary dynamics of 5S rDNA location in acridid grasshoppers and its relationship with H3 histone gene and 45S rDNA location
(2011-07-01)
We analyze the chromosomal location of 5S rDNA clusters in 29 species of grasshoppers belonging to the family Acrididae. There was extensive variation among species for the number and location of 5S rDNA sites. Out of 148 ...
Fluorescence piroxicam study in the presence of cyclodextrins by using the PARAFAC method
(Soc Applied SpectroscopyFrederickEUA, 1999)
Daily dynamics of photosynthesis of the freshwater red alga Sirodotia delicatula (Batrachospermales, Rhodophyta)
(Wiley-Blackwell Publishing, Inc, 2009-12-01)
P>The daily course of photosynthetic parameters of a population of the freshwater red alga Sirodotia delicatula from São Paulo State, Brazil (20 degrees 43'24 ' S, 49 degrees 18'21 ' W) was investigated under natural and ...
Unravelling the interaction of piperlongumine with the nucleotide-binding domain of hsp70: A spectroscopic and in silico study
(2021-12-01)
Piperlongumine (PPL) is an alkaloid extracted from several pepper species that exhibits anti-inflammatory and anti-carcinogenic properties. Nevertheless, the molecular mode of action of PPL that confers such powerful ...