Results 21 to 30 of about 2,897,926 (346)

Absolute absorption and fluorescence measurements over a dynamic range of 10$^6$ with cavity-enhanced laser-induced fluorescence [PDF]

open access: yes, 2013
We describe a novel experimental setup that combines the advantages of both laser-induced fluorescence and cavity ring-down techniques. The simultaneous and correlated measurement of the ring-down and fluorescence signals yields absolute absorption ...
Berden G.   +7 more
core   +3 more sources

A superior bright NIR luminescent nanoparticle preparation and indicating calcium signaling detection in cells and small animals

open access: yesCell & Bioscience, 2018
Background Near-field fluorescence (NFF) effects were employed to develop a novel near-infrared (NIR) luminescent nanoparticle (LNP) with superior brightness. The LNP is used as imaging contrast agent for cellular and small animal imaging and furthermore
Jian Zhang, Joseph. R. Lakowicz
doaj   +1 more source

Wide-Field Multi-Parameter FLIM: Long-Term Minimal Invasive Observation of Proteins in Living Cells. [PDF]

open access: yes, 2011
Time-domain Fluorescence Lifetime Imaging Microscopy (FLIM) is a remarkable tool to monitor the dynamics of fluorophore-tagged protein domains inside living cells.
Duci, A.   +9 more
core   +9 more sources

Spatial and temporal pulse shaping for lateral and depth resolved two-photon excited fluorescence contrast [PDF]

open access: yes, 2019
We report combined temporal and spatial laser pulse shaping to perform lateral and depth dependent two-photon excited fluorescence of dyes. For generating the specific spatially and temporally phase tailored pulses a temporal pulse shaper and a ...
Büchau, F.   +4 more
core   +1 more source

Palaeomagnetic and synchrotron analysis of >1.95 Ma fossil-bearing palaeokarst at Haasgat, South Africa

open access: yesSouth African Journal of Science, 2014
Palaeomagnetic analysis indicates that Haasgat, a fossil-bearing palaeocave in the Gauteng Province of South Africa, is dominated by reversed magnetic polarity in its oldest, deepest layers and normal polarity in the younger layers.
Andy I.R. Herries   +7 more
doaj   +1 more source

Interaction of high density lipoprotein particles with membranes containing cholesterol

open access: yesJournal of Lipid Research, 2007
In this study, free cholesterol (FC) efflux mediated by human HDL was investigated using fluorescence methodologies. The accessibility of FC to HDL may depend on whether it is located in regions rich in unsaturated phospholipids or in domains containing ...
Susana A. Sanchez   +2 more
doaj   +1 more source

A versatile standard for bathochromic fluorescence based on intramolecular FRET. [PDF]

open access: yes, 2011
A perylene and a terrylene tetracarboxylic bisimide dyad was prepared in which an efficient energy transfer from the former to the latter is observed. The absorption spectrum of this compound covers a broad range.
Adachi   +25 more
core   +1 more source

Fluorescent taxoids

open access: yesChemistry & Biology, 1996
Taxol is a natural product produced by the Pacific Yew, Taxus brevifolia, that has emerged as a prominent chemotherapeutic agent for the treatment of solid tumors. Taxol's biochemical mode of action has been well studied: it binds to microtubules, stabilizing them and preventing their depolymerization to tubulin subunits.
Guy, R.K.   +3 more
openaire   +2 more sources

Photophysics, Molecular Reorientation in Solution and X-Ray Structure of a New Fluorescent Probe 1,7-Diazaperylene [PDF]

open access: yes, 1993
A new fluorescent molecule 1,7-diazaperylene (DP) has been investigated by means of time-resolved and steady-state polarized fluorescence spectroscopy, as well as X-ray spectroscopy.
Barkely   +32 more
core   +1 more source

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