Navigation Links
Cyclodextrin enhances room temperature phosphorescence

atom, in the cavity of cyclodextrin.4 Figure 1 depicts the inclusion of a phenanthrene molecule within the cavity of a β-CD. Scypinski and Cline Love also have observed CD-RTP in nitrogen heterocycles and bridged biphenyls.5


A description of the experiments with PAHs will serve to illustrate the technique of CD-RTP, and provide a basis for assessing its advantages.


Experimental Method
Each PAH analyte was dissolved in either methanol or acetone, after which the solvent was gently evaporated. Addition of a 0.10.5-mL aliquot of 1,2-dibromoethane (DBE) was followed by dilution with 0.01-M aqueous CD solution. Upon vigorous shaking, the complex was formed. The cloudy solution obtained was then deoxygenated for fifteen minutes with nitrogen gas prepurified in an Alltech Oxy-Trap.

All spectra were taken on a SPEX FLUOROLOG spectrophotometer with double excitation and emission monochromators. A 450-W xenon CW lamp was used as the excitation source, and a cooled R928 photomultiplier (PMT) tube as the detector. Slits were set to 14.4 nm (excitation) and 3.6 nm (emission). The scan rate was 1 nm s1. All emission spectra were corrected for fluctuations in the intensity of the lamp and PMT responses.


Results and Discussion
The investigation showed the CD-RTP technique to be extremely sensitive, producing intense, well-structured phosphorescence signals at nanomolar concentrations. Detection limits of two typical phosphors, phenanthrene and acenaphthene, were estimated at 5 1013 M and 1 1011 M, respectively. Although the excited triplet state is known to be susceptible to oxygen quenchers, inclusion of the lumiphor inside the CD cavity was observed to offer some protection against quenching by oxygen molecules in the bulk solution. In these experiments, 10
'"/>

Source:


Page: All 1 2 3 4 5

Related biology technology :

1. Using Gradient PCR to determine the optimum annealing temperature.
Post Your Comments:
*Name:
*Comment:
*Email:
TAG: Cyclodextrin enhances room temperature phosphorescence

(Date:7/30/2014)... 30, 2014 Researchers often use microelectronic ... but such devices can do much more – ... such, researchers have looked to patterned assemblies of ... metabolic engineering to characterize – and potentially control ... are envisioned to recreate animal and human physiological ...
(Date:7/30/2014)... July 30, 2014 Connecticut Center for ... based in East Hartford, Conn., was awarded a Rural ... of a project that will determine the feasibility of ... north-central Connecticut. USDA Rural Development provided $53,000 for CCAT ... the second phase of the feasibility study in fiscal ...
(Date:7/29/2014)... (PRWEB) July 30, 2014 ... and collaboration company, is proud to announce the ... management positions in their Boston, Charleston and Atlanta ... to the increased demand for hosted solutions, collaboration ... efficiency and reduce cost. , SoundConnect was founded ...
(Date:7/29/2014)... , July 29, 2014 Human Longevity, Inc. ... company focused on extending the healthy, high performance human ... Och , Ph.D., an expert in machine learning and ... comes to HLI from Google where he was Distinguished ... will report directly to HLI Co-Founder and CEO, ...
Breaking Biology Technology:UMD Researchers Bridge Gap between Microelectronics, Biological Systems 2UMD Researchers Bridge Gap between Microelectronics, Biological Systems 3UMD Researchers Bridge Gap between Microelectronics, Biological Systems 4USDA Grant Funds Second Phase of Bio-Energy Research Community Economic Development in CT 2USDA Grant Funds Second Phase of Bio-Energy Research Community Economic Development in CT 3SoundConnect Organization and Culture is Evolving 2Franz Och, Ph.D., Expert in Machine Learning and Machine Translation, Joins Human Longevity, Inc. as Chief Data Scientist 2Franz Och, Ph.D., Expert in Machine Learning and Machine Translation, Joins Human Longevity, Inc. as Chief Data Scientist 3
... Andrew Conn, Lindy Durrant, and Ian Spendlove, Cancer Research,Campaign Academic Unit, Nottingham City Hospital, ... Introduction , ... and reproducible , method of DNA vaccine ... protective immunity in animal models to both infectious diseases and ...
... and Professor Norbert Nowotny, PhD, Clinical , Virology ... Vienna , Veterinaerplatz 1, A 1210 Vienna, Austria , ... , The purity of the DNA template ... the most critical factor in nucleotide sequencing. The presence of , ...
... Marttinen*, H.-L. Malinen*, V.-P. Jaakola** and , T. Alatossava* ... * Biotechnology Laboratory, REDEC of Kajaani, University of Oulu, FIN-88600 , ... Environmental Science, University of Jyvskyl, , PL 35, FIN-40351 Jyvskyl, ... Introduction , β-lactoglobulin (βLG) is a major ...
Cached Biology Technology:Delivery of pCMV-S DNA Using the Helios Gene Gun System Is Superior to Intramuscular Injection in Balb/c Mice 2Delivery of pCMV-S DNA Using the Helios Gene Gun System Is Superior to Intramuscular Injection in Balb/c Mice 3Delivery of pCMV-S DNA Using the Helios Gene Gun System Is Superior to Intramuscular Injection in Balb/c Mice 4Delivery of pCMV-S DNA Using the Helios Gene Gun System Is Superior to Intramuscular Injection in Balb/c Mice 5Delivery of pCMV-S DNA Using the Helios Gene Gun System Is Superior to Intramuscular Injection in Balb/c Mice 6Delivery of pCMV-S DNA Using the Helios Gene Gun System Is Superior to Intramuscular Injection in Balb/c Mice 7Delivery of pCMV-S DNA Using the Helios Gene Gun System Is Superior to Intramuscular Injection in Balb/c Mice 8Comparison of PCR Kleen Spin Columns to Traditional Methods for Purification of PCR Products Prior to Sequencing, Rev A 2Comparison of PCR Kleen Spin Columns to Traditional Methods for Purification of PCR Products Prior to Sequencing, Rev A 3Comparison of PCR Kleen Spin Columns to Traditional Methods for Purification of PCR Products Prior to Sequencing, Rev A 4Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 2Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 3Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 4Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 5Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 6Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 7Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 8Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 9Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 10Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 11Purification and Characterization of beta-Lactoglobulin Genetic Variants A and B Using Preparative Electrophoresis and Isoelectric Focusing 12
(Date:7/30/2014)... , July 30, 2014 ... Global Government Biometric Systems Market 2014-2024   Business ... The Global Biometric Systems Market 2014-2024" offers the ... market over the next ten years, alongside potential ... market size forecasts. To view the ...
(Date:7/30/2014)... To help Americans make better decisions about what they ... year proposed significant changes to the Nutrition Facts label ... An article in Chemical & Engineering News ... Society, explains the suggested updates and the fight ... at C&EN, points out that while the Nutrition Facts ...
(Date:7/30/2014)... of major interest in neuroscience. A large number ... stages of Wallerian degeneration: transcription factor activation, immune ... expression responses in the distal segment of the ... differences in gene expression between the proximal and ... co-workers from Nantong University, China used microarrays to ...
Breaking Biology News(10 mins):Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 2Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 3Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 4Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 5Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 6Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 7Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 8Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 9Global Government Biometric Systems Market Size, Share, Trends and Forecasts 2014-2024 Available Online by Researchmoz.us 10
... of oil are unwarranted, according to new research, which concludes ... supply will reach its own peak and then decline. ... from a calm development of alternatives to calamitous shortages, panic ... of oil production and then supplies fall. But ...
... that float over large areas of the world,s oceans ... the "Plastisphere." Their report in the ACS journal ... habitats in the North Atlantic Ocean may harbor potential ... Association, Tracy Mincer of the Woods Hole Oceanographic Institution ...
... WASHINGTON, DC In nearly every major cause of premature ... violence the United States trails its economic peers, according ... by the Institute for Health Metrics and Evaluation (IHME) at ... the Journal of the American Medical Association today ...
Cached Biology News:Stanford researchers say 'peak oil' concerns should ease 2Stanford researchers say 'peak oil' concerns should ease 3United States losing ground to other countries in health outcomes 2United States losing ground to other countries in health outcomes 3United States losing ground to other countries in health outcomes 4
... Yeast nitrogen base (YNB) is a base medium ... media. YNB contains ammonium sulfate but does not ... pouches are available. Each pouch contains reagents ... Pichia media or 1000 ml of 10X YNB ...
... bioassays for interferons are cytopathic effect inhibition ... assays. The neutralization assay measures the ... of the cytokine. Sample types include; tissue ... In these assays, one unit is defined ...
Rabbit polyclonal to Shigella Immunogen: Mixture of S. boydii, S. flexneri & S. dysenteriae....
... Monoclonal Antibody is a mouse monoclonal ... the 26 kDa glutathione-S-transferase (GST) domain ... antibody is suitable for detecting fusion ... in E. coli , yeast, mammalian, ...
Biology Products: