Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 20 of 24 for “"fluorescence decay"”.
-
The Recovery Of Underlying Lifetime Distributions From Fluorescence Decay Data
… distributions from single photon counting fluorescence decay data are described, namely the Exponential Series Method (ESM) and the Maximum Entropy Method (MEM). Extensive testing of these two methods is performed, using both real and simulated decay curves, in order to establish their …
-
Thermal and denaturation studies of the time-resolved fluorescence decay of superoxide dismutase
Time-resolved fluorescence of single tryptophan proteins have demonstrated the complexity of protein dynamic and structure. In particular, for some single tryptophan proteins, their fluorescence decay is best described by a distribution of fluorescence lifetimes rather than one or two lifetimes. …
-
Fluorescence Decay of Pyrene Butyric Acid Attached to Macromolecules: A Study by Pulsed Laser Excitation
Made available in DSpace on 2015-05-12T21:41:55Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 7013526.PDF: 4524942 bytes, checksum: 31e69bc088c2804aa8e6d815ab9feee6 (MD5) Previous issue date: 1969
-
Iodine-Monofluoride (If) Emission Spectrum and Formation Kinetics in Electron Beam Produced Plasmas
… gas mixtures produces intense blue-green fluorescence attributed to the heteronuclear interhalogen iodine-monofluoride (IF). Analysis of the observed IF emission spectrum has shown that it is most likely due to E (--->) A('3)(PI)(,1) transitions of this molecule. Fluorescence decay …
-
Fluorescence Studies of Photosystem II Fluorescence Quenching During Desiccation
… coupled to PSII and characterized by a fast-fluorescence decay lifetime, and long-wavelength emission. The present study compares the relative ability of green algae and lichens to recover photosynthetic activity after periods of desiccation using steady state fluorescence emission …
-
Fluorescence lifetime distributions in proteins
… was developed to measure the natural fluorescence decay of single tryptophan residue proteins. The instrumentation uses mode-locked, synchronously pumped, cavity dumped and frequency doubled dye laser excitation. The detectors are modulated phase coherently with the mode-locked laser …
-
Heterogeneity of photosystem II as it occurs in domain specific regions of the thylakoid membrane of spinach (spinacia oleracia L.)
… sizes of the functional PSII antenna and the fluorescence induction kinetics were measured and used to determine the relative contributions of PSlla and PSII~ to each fraction. Picosecond chlorophyll fluorescence decay kinetics were collected for each fraction to characterize and gain insight …
-
Excitation evolution and self-regulation ability of photosynthetic light-harvesting systems /
… in order to understand the processes of fluorescence intermittency and singlet–triplet annihilation, observed in single LHCII complexes. It is also demonstrated that the multi-exponential fluorescence decay kinetics, observed in various photosynthetic systems is just a manifestation of …
-
Sužadinimo evoliucija ir savireguliacijos geba fotosintetinėse šviesą surenkančiose sistemose /
… in order to understand the processes of fluorescence intermittency and singlet–triplet annihilation, observed in single LHCII complexes. It is also demonstrated that the multi-exponential fluorescence decay kinetics, observed in various photosynthetic systems is just a manifestation of …
-
Examining the Role of Phospholamban Phosphorylation on Interaction with SERCA Using Fluorescence Microscopy
… SERCA and PLB respectively, in HEK293 cells for fluorescence resonance energy transfer (FRET) microscopy experiments. We were able to use the native beta-adrenergic signaling system in the cells to control the state of PLB phosphorylation in a time-dependent manner. For the dissociation model to …
-
Minimally invasive neuromodulation using mechanically-sensitive ion channels and magnetically-actuated nanotransducers
… calcium imaging signal from background noise and fluorescence decay. The findings described in this thesis suggest that minimally-invasive mechanical neuromodulation can offer a safe and precise alternative to DBS for both clinical and research applications.
-
Interaction between respiratory carbon flow and photosynthetic light harvesting in the green alga, selenastrum minutum
… large perturbations in room temperature and 77Kfluorescence emission indicative of a state 1 to 2 transition. These changes were correlated with reduction of the PQ pool as measured by changes in the kinetics of time-resolved fluorescence decay and induction. Class 2 treatments included NO3- …
-
Computational Dead Time Correction in Fluorescence Lifetime Imaging Microscopy (FLIM)
<p>Fluorescence Lifetime Imaging Microscopy (FLIM) is a crucial tool in biomedical research. It can visualize and measure molecular interactions and cellular processes by analyzing the fluorescence decay of molecules in biological samples. Unlike traditional imaging methods based on fluorescence …
-
Development of bismuth doped silica fibres for high power sources & long wavelength generation from ytterbium doped fibre lasers
… Spectroscopic absorption and Bi luminescence and fluorescence decay properties under different pumping wavelengths and with different host glass compositions are presented and provide important information for device applications. The influence of unsaturable loss on laser performance is …
-
A study of benzazole derivatives showing large stokes shifts
… presence of phosphorus trichloride. Solid state fluorescence properties of benzazoles bearing a phenyl , naphthyl or coumarinyl substituent at the 2-position have been investigated. It has been confirmed that the presence of a 2'-hydroxy group is necessary for fluorescence to occur and a scheme …
-
Excited state proton transfer in 2-substituted benzothiazoles
… and temperature. Measurements of absorption and fluorescence spectra and fluorescence decay profiles under these various conditions have been combined with theoretical calculations to arrive at an understanding of the excited state behaviour of HBT and derivatives. An investigation has been made …
-
Morphological and physiological growth responses of Kentucky bluegrass to foliar applications of iron, a cytokinin, and growth regulator- like chemicals
… by carbon dioxide exchange, percent chlorophyll fluorescence decay, and leaf color ratings. Applications of Fe or propiconazole also delayed excision-induced senescence of Kentucky bluegrass leaves, while the anti-senescence activity of triadimefon was highly variable. Combinations of Fe with BA …
-
Development of a simulation environment for the analysis and the optimal design of fluorescence detectors based on single photon avalanche diodes
Time-resolved fluorescence measurements enable the study of structure of molecular systems and dynamical processes inside them. This is possible because of a very high sensitivity of fluorescence lifetime to the physical and chemical properties of micro-environment in which fluorophores are …
-
Functional studies on the extrinsic proteins of Photosystem II
… levels by the His6-tagged PsbO-1 protein. Flash fluorescence induction analysis indicated that a higher level of the modified PsbO-1 protein was required to increase the ratio of PS IIα to PS IIβ reaction centers to wild type levels. Fluorescence decay kinetics in the absence of DCMU indicated …
-
Solution photochemistry of derivatives of Michler's Ketone
… with quantum yields of the order of 0.001 and decay times shorter than 100 psec. At 77 K both fluorescence and phosphorescence are observed. The phosphorescence spectra usually exhibited a shoulder to the red of the emission maximum, although a second peak is occasionally observed. In …
Page 1 of 2