Recognition of Single Fluorescence Events by Temporal Pixel Intensity Fluctuation

Single-molecule localization microscopy circumvents the diffraction limit of traditional fluorescence microscopy by detecting the photoemission signals of individual fluorescent molecules. The accurate recognitions of fluorescence molecules/events are critical to single-molecule/super-resolution imaging experiments, which determine the precision of molecular localizations and the quality of the image reconstruction. Herein, we presented a single-molecule detection method which relied on the temporal pixel intensity fluctuation. The method was capable of quickly determining the approximate localizations of fluorescence events with high sensitivity. We evaluated the performance of the method under a series of signal-to-noise ratios (SNR) and discussed the criterion of setting the temporal fluctuation threshold to achieve the optimized spots recognition results

SiteFind: A software tool for introducing a restriction site as a marker for successful site-directed mutagenesis-1

<p><b>Copyright information:</b></p><p>Taken from "SiteFind: A software tool for introducing a restriction site as a marker for successful site-directed mutagenesis"</p><p>BMC Molecular Biology 2005;6():22-22.</p><p>Published online 1 Dec 2005</p><p>PMCID:PMC1314889.</p><p></p> showing a novel BglII site discovered within the sequence

SiteFind: A software tool for introducing a restriction site as a marker for successful site-directed mutagenesis-0

<p><b>Copyright information:</b></p><p>Taken from "SiteFind: A software tool for introducing a restriction site as a marker for successful site-directed mutagenesis"</p><p>BMC Molecular Biology 2005;6():22-22.</p><p>Published online 1 Dec 2005</p><p>PMCID:PMC1314889.</p><p></p>cleotides and each successive window is shifted forward 4 nucleotides, ensuring minimal overlap. b) Example of all the possible sequences generated for each of the first two search windows using the moving window algorithm

SiteFind: A software tool for introducing a restriction site as a marker for successful site-directed mutagenesis-2

<p><b>Copyright information:</b></p><p>Taken from "SiteFind: A software tool for introducing a restriction site as a marker for successful site-directed mutagenesis"</p><p>BMC Molecular Biology 2005;6():22-22.</p><p>Published online 1 Dec 2005</p><p>PMCID:PMC1314889.</p><p></p>d plasmid DNA. c) α-Flag Western blot showing expression of mutant construct in 293T cells. d) Sequencing result of the mutation, mutated residue is highlighted in red

SiteFind: A software tool for introducing a restriction site as a marker for successful site-directed mutagenesis-3

<p><b>Copyright information:</b></p><p>Taken from "SiteFind: A software tool for introducing a restriction site as a marker for successful site-directed mutagenesis"</p><p>BMC Molecular Biology 2005;6():22-22.</p><p>Published online 1 Dec 2005</p><p>PMCID:PMC1314889.</p><p></p>tated plasmid DNA. g) α-Flag Western blot showing expression of mutant construct in 293T cells. h) Sequencing result of the mutation, mutated residues are highlighted in red

Surface Preparation for Single-Molecule Fluorescence Imaging in Organic Solvents

The development of single-molecule techniques provides opportunities to investigate the properties and heterogeneities of individual molecules, which are almost impossible to be obtained in ensemble measurements. Recently, single-molecule fluorescence microscopy is being applied more and more to study chemical reactions in organic solvents. However, little has been done to optimize the surface preparation procedures for single-molecule fluorescence imaging in organic solvents. In this work, we developed a method to prepare the surface for single-molecule fluorescence imaging in organic solvents with a well-controlled surface density of chemically immobilized dye molecules and a low density of nonspecifically adsorbed impurities. We also compared the surfaces prepared by two different procedures and studied the impacts of the polarities of the solvent and the surface functionality on the quality of prepared surface. We found that higher polarities of both the solvent and the surface functionality provided better control of the surface density of chemically immobilized dyes and helped reduce the nonspecific adsorption of both dyes and fluorescent impurities in organic solvents. We further performed single-molecule fluorescence imaging in DMF and investigated the photophysical properties of dyes and fluorescent impurities, which could be used to filter out false counts in single-molecule fluorescence measurements

<i>In Operando</i> Visualization of Elementary Turnovers in Photocatalytic Organic Synthesis

We report the in operando visualization of the photocatalytic turnovers on single eosin Y (EY) through a redox-induced photoblinking phenomenon. The photocatalytic cyclization of thiobenzamide (TB) catalyzed by EY was investigated. The analysis of the intensity-versus-time trajectories of single EYs revealed the kinetics and dynamics of the elementary photocatalytic turnovers and the heterogeneity of the activity of individual EYs. The quenching turnover time showed a fast population and a slow population, which could be attributed to the singlet and triplet states of photoexcited EY. The slow quenching turnovers were more dominant at higher TB concentrations. The activity heterogeneity of EYs was studied over a series of reactant concentrations. Excess quenching reagent was found to decrease the percentage of active EYs. The method can be broadly applied to studying the elementary processes of photocatalytic organic reactions in operando

<i>In Operando</i> Visualization of Elementary Turnovers in Photocatalytic Organic Synthesis

We report the in operando visualization of the photocatalytic turnovers on single eosin Y (EY) through a redox-induced photoblinking phenomenon. The photocatalytic cyclization of thiobenzamide (TB) catalyzed by EY was investigated. The analysis of the intensity-versus-time trajectories of single EYs revealed the kinetics and dynamics of the elementary photocatalytic turnovers and the heterogeneity of the activity of individual EYs. The quenching turnover time showed a fast population and a slow population, which could be attributed to the singlet and triplet states of photoexcited EY. The slow quenching turnovers were more dominant at higher TB concentrations. The activity heterogeneity of EYs was studied over a series of reactant concentrations. Excess quenching reagent was found to decrease the percentage of active EYs. The method can be broadly applied to studying the elementary processes of photocatalytic organic reactions in operando

Additional file 3: of Identification of genes regulating ovary differentiation after pollination in hazel by comparative transcriptome analysis

Table S3. DEGs in F-vs-S paired comparisons. (XLSX 4773 kb

Additional file 6: of Identification of genes regulating ovary differentiation after pollination in hazel by comparative transcriptome analysis

Table S6. KEGG pathway enrichment analysis of DEGs identified in F-vs-S paired comparisons. (XLSX 23 kb