D
David D. Kryak
Researcher at United States Environmental Protection Agency
Publications - 8
Citations - 743
David D. Kryak is an academic researcher from United States Environmental Protection Agency. The author has contributed to research in topics: Polynucleotide & Oligonucleotide. The author has an hindex of 6, co-authored 8 publications receiving 696 citations. Previous affiliations of David D. Kryak include Research Triangle Park & University of Cincinnati.
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Journal ArticleDOI
Transport of Chemical and Microbial Compounds from Known Wastewater Discharges: Potential for Use as Indicators of Human Fecal Contamination
Susan T. Glassmeyer,Edward T. Furlong,Dana W. Kolpin,Jeffery D. Cahill,Steven D. Zaugg,Stephen L. Werner,Michael T. Meyer,David D. Kryak +7 more
TL;DR: This research suggests that selected chemicals are useful as tracers of human wastewater discharge by determining the persistence of a chemically diverse suite of emerging contaminants in streams.
Journal ArticleDOI
Preparation and characterization of spin-labeled oligonucleotides for DNA hybridization.
TL;DR: Sequence-specific spin-labeled oligodeoxynucleotides with conformation-sensitive electron paramagnetic resonance (EPR) signals are synthesized and examined as solution-phase nucleic acid hybridization probes yielding stable spin- labeled probes with distinctive EPR specific activity (AEPR) values.
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Three Novel Spin-Labeled Substrates for Enzymatic Incorporation into Nucleic Acid Lattices
TL;DR: Two dUTP analogs were incorporated into copolymers by polynucleotide phosphoxylase (PNPase) and was a good substrate for TdT, whereas the other one served as substrate for E. coli DNA polymerase (Pol I).
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Investigation of the effect of a dc glow discharge on the performance of a particle beam liquid chromatography/mass spectrometry interface
TL;DR: A low voltage (180-V) dc glow discharge device was inserted in a particle beam interface of a high performance liquid chromatography/mass spectrometry system and the combination of glow discharge and ammonium acetate provided no meaningful advantage over the individual techniques.
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An improved method for the analysis of Cryptosporidium parvum oocysts by matrix-assisted laser desorption/ionization time of flight mass spectrometry.
TL;DR: The mass spectra of the intact oocysts contained many of the same peaks found in the mass specta of the sporozoites, suggesting that during analysis, the internal constituents, not just the oocyst wall, are ablated by the laser.