Previously, we reported a method for facile purification of oligonucleotides labeled with hydrophobic dyes, based on the solubility difference between the hydrophilic DNA and unreacted dye. Here, we present a new purification method applicable to any dye regardless of its hydrophobicity. We exploited the population shift of a fluorescent dye in a low-pH aqueous solution from its anionic form to...

We report an organic solid-state distributed feedback laser consisting of an organic active layer and a Bragg grating without morphological change. The active layer consists of 4-~dicyanomethylene!-2-methyl-6-~4-dimethylaminostryl!-4H-pyran as a laser dye, tris~8hydroxyquinoline! aluminum as a host, and poly~methyl methacrylate! as a binder. The threshold and linewidth of the laser are 400 mJ/c...

A novel intracavity laser diagnostic has been developed to perform quantitative two-dimensional imaging of major species and temperature by using spontaneous Raman scattering and Rayleigh scattering in a turbulent flame. A flash-lamp-pumped dye laser cavity is modified to include sheet-forming optics and 100% reflecting end mirrors. In a comparison of this system with a laser configuration with...

Developments and evaluations from the preceding projects have been presented by Dye, Fagerberg, Midtsveen (2004), Dye & Fagerberg (2004), Dye & Rekkedal (2005), Fagerberg, Rekkedal & Russell (2002), Rekkedal (2002a), Rekkedal (2002b), Rekkedal (2002c), Rekkedal & Dye (2007), Russell (2005). The article by Rekkedal & Dye (2007) builds on the same data, however with specific reference to use of S...

Our objective was to study the properties of the carboxyfluorescein diacetate succinimidyl ester (CFDA-SE) and the methodology of cell labeling using CFDA-SE fluorescent dye. First, we analyzed the kinetics of CFDA-SE fluorescent dye intensity over time. Second, we determined the optimal concentration of CFDA-SE fluorescent dye for cell labeling. Third, we tested the toxicity of CFDA-SE fluores...

Abstract Dye is a major source of water pollution. This mini-review highlights the origin dye, its removal strategies, and recent literature methylene blue Congo red adsorption by activated carbons. Adsorption unique process that relies upon physicochemical properties carbon inherent characteristics dye. Also, factors affecting adsorption, such as contact time, temperature, concentration, were ...

We show here the first example of a hydrogel formed from a symmetrically functionalised diketopyrrolopyrrole aromatic core. Gelation is triggered by change in pH. Not only does this gelator form aggregated, entangled structures at low pH, but it also forms worm-like micelles at high pH. The structures at high pH can be aligned using shear to provide conductive materials.

Prinzmetal et a!, used 24Na for this purpose (1), while others used al bumin 1311 (2). With more extensive experience, procedures improved over the years until, in 1958, Pritchard et al (3) reported an effective method for the external precordial detection and determination of cardiac output with albumin †̃@†̃I. During this time, a good correlation with dye dilution technique by means of arte...