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Moving away from Kayexalate, sodium polystyrene sulfate.
Am J Emerg Med
August 2016
Division of Kidney Disease and Hypertension, Rhode Island Hospital, Providence, RI 02903; Warren Alpert Medical School of Brown University, Providence, RI 02903. Electronic address:
Combined holographic-mechanical optical tweezers: construction, optimization, and calibration.
Rev Sci Instrum
August 2009
Condensed Matter Physics Laboratory, Heinrich-Heine University, 40225 Düsseldorf, Germany.
A spatial light modulator (SLM) and a pair of galvanometer-mounted mirrors (GMM) were combined into an optical tweezers setup. This provides great flexibility as the SLM creates an array of traps, which can be moved smoothly and quickly with the GMM. To optimize performance, the effect of the incidence angle on the SLM with respect to phase and intensity response was investigated.
View Article and Find Full Text PDFColorimetric assay for sensitive poly(styrene sulfonate) quantification in a template directed polyelectrolyte-assembling process.
Biotechnol J
March 2008
RWTH Aachen University, Department of Biotechnology, Aachen, Germany.
Template directed Layer-by-layer (LbL) technology recently moved into the center of scientific attention, particularly as a versatile tool for bioencapsulation purposes. Its major advantages can be found in the striking simplicity of tuning wall properties and the complete control over layer thickness and permeability. Yet, for the most commonly applied pair of polyelectrolytes, poly(allylamine) hydrochloride (PAH) and poly(styrene sulfonate) sodium salt (PSS), the mandatory control of the successful deposition on plane and colloidal surfaces is currently only attainable by means of sophisticated and expensive equipment.
View Article and Find Full Text PDFBlowing DNA bubbles.
Nano Lett
November 2006
Department of Physics, Humboldt University Berlin, Newtonstr. 15, D-12489 Berlin, Germany.
We report here experimental observations which indicate that topologically or covalently formed polymer loops embedded in an ultrathin liquid film on a solid substrate can be "blown" into circular "bubbles" during scanning force microscopy (SFM) imaging. In particular, supercoiled vector DNA has been unraveled, moved, stretched, and overstretched to two times its B-form length and then torn apart. We attribute the blowing of the DNA bubbles to the interaction of the tapping SFM tip with the ultrathin liquid film.
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