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Full-Text Articles in Science and Technology Studies
A Ratiometric Fluorescent Metal Ion Indicator Based On Dansyl Labeled Poly(N-Isopropylacrylamide) Responds To A Quenching Metal Ion, Shawn Burdette, Jie Du, Shaojun Yao, W. Seitz, Nicholas Bencivenga, Justin Massing, Roy Planalp, Randy Jackson, Daniel Kennedy
A Ratiometric Fluorescent Metal Ion Indicator Based On Dansyl Labeled Poly(N-Isopropylacrylamide) Responds To A Quenching Metal Ion, Shawn Burdette, Jie Du, Shaojun Yao, W. Seitz, Nicholas Bencivenga, Justin Massing, Roy Planalp, Randy Jackson, Daniel Kennedy
Shawn C. Burdette
The fluorescence emission of poly(N-isopropylacrylamide) (PNIPAM) covalently tagged with a 5-(dimethylamino)naphthalene-1-sulfonyl (dansyl) fluorophore and an iminodiacetic acid (IDA) chelator changes with temperature and with Cu(II) complexation. Increasing the temperature above the lower critical solution temperature (LCST) causes the polymer to collapse from a coil to a compact globule. This changes the environment experienced by the fluorophore causing a shift in maximum emission wavelength from 546 to 508 nm and an increase in the ratio of emission intensity at 508 nm to emission intensity at 546 nm from 0.70 to almost 1.40. Metal ions can be sensed by working at a …
To Phd Or Not To Phd?, Daniel Edwards
To Phd Or Not To Phd?, Daniel Edwards
Dr Daniel Edwards
Research degrees, particularly the PhD, are seen as an important stepping stone into a research career, particularly in the sciences where chemistry is no exception. However, as part of any contemplation about undertaking a PhD, prospective students should keep in mind the sort of career, types of future research and location of the work they might be hoping to pursue. A research project by the Australian Council for Educational Research (ACER) for the Federal Department of Education, Employment and Workplace Relations (DEEWR) provides some important insights into the supply and demand for research positions in science in Australia.