Search
Now showing items 1-10 of 56
Structural organization of cetyltrimethylammonium sulfate in aqueous solution: the effect of Na2SO4
(Elsevier B.V., 2006-07-15)
We used dynamic light scattering (DLS), a steady-state fluorescence, time resolved fluorescence quenching (TRFQ), tensiometry, conductimetry, and isothermal titration calorimetry (ITC) to investigate the self-assembly of ...
The dynamics of fluorescent dissolved organic matter in the Paranaguá estuarine system, Southern Brazil
(Inst Oceanografico, Univ Sao Paulo, 2011-10-01)
The aim of this study was to investigate the dynamics of the fluorescent dissolved organic matter (FDOM) in Paranagua Estuarine System (PES) as to infer about the contribution of allochthonous FDOM to the estuarine waters ...
Preferential location of lidocaine and etidocaine in lecithin bilayers as determined by EPR, fluorescence and H-2 NMR
(Elsevier B.V., 2008-01-01)
We have examined the effect of the uncharged species of lidocaine (LDC) and etidocaine (EDC) on the acyl chain moiety of egg phosphatidylcholine liposomes. Changes in membrane organization caused by both anesthetics were ...
End-to-end distance distribution in bradykinin observed by Forster resonance energy transfer
(Elsevier B.V., 2000-04-06)
Forster resonance energy transfer (FRET) was used to study the conformational dynamics of bradykinin related peptides. the fluorescent probe aminobenzoic acid (Abz) bound to the amino terminal of bradykinin maintained its ...
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 ...
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 ...
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 ...
Effect of temperature on the interaction between the nonionic surfactant C(12)E(5) and poly(ethylene oxide) investigated by dynamic light scattering and fluorescence methods
(Amer Chemical Soc, 1996-10-07)
The interaction between the nonionic surfactant C(12)E(5) and a high molar mass (M = 5.94 x 10(5)) poly(ethylene oxide) (PEG) in aqueous solution has been examined as a function of temperature by dynamic light scattering ...