Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
Results
Showing 1 to 6 of 6 for “"PS - MS"”.
-
Paper spray mass spectrometry (PS-MS) for toxicological drug screens and biomonitoring of chemical warfare agent exposure
… for sample preparation. This work further develops the technique in two major areas: negative ionization and drug screening. Negative ionization has always been an obstacle to electrospray-based ion sources because of its vulnerability to corona discharge, but methods are presented here to both …
-
Expanding the Capabilities of Paper Spray Mass Spectrometry: High-Throughput Drug Screening and On-Paper Electrokinetic Stacking
Paper spray mass spectrometry (PS-MS) offers advantages in simplicity and rapid analysis but faces challenges that have limited its widespread adoption. These include insufficient sensitivity for certain analytes, susceptibility to matrix effects in complex samples, and inconsistent quantitative …
-
Paper Spray - Mass Spectrometry: Investigation of Sampling Devices for Illicit Drug Detection and Quantification
Paper spray - mass spectrometry (PS-MS) has been developed as a rapid and direct ionization method for qualitative and quantitative analysis of complex samples at trace levels. In this work, different sampling devices for PS-MS were investigated to improve the assay’s simplicity and sensitivity …
-
Characterization, Imaging and Quantitation of Small Molecules by Ambient Ionization Mass Spectrometry
… of interest, ionization techniques such as DESI, PS, MALDI, etc are incorporated into the front of the mass spectrometer. In this work, the ambient ionization techniques, DESI-MS and PS-MS was modulated for characterization, imaging and quantification of small molecules. The use of DESI-MS and …
-
Mecanismos de tolerância e alterações metabólicas em plantas de linhaça dourada (Linum Usitatissimum L.) expostas e co-expostas a arsênio e selênio
… de massas com plasma acoplado indutivamente (ICPMS). As alterações provocas pelo Se nos mecanismos de tolerância e no metabolismo da planta quando co-exposto ao As também foram investigadas utilizando duas técnicas de espectrometria de massas com ionização ambiente PSMS (paper spray mass …
-
The Discovery and Chemical Synthesis of Peptides and Proteins that Cross Biological Barriers
… a complex task. Cell-penetrating peptides (CPPs) and proteins are used as carrier modules, tissue targeting agents, and probes to better understand disease states. In this work, we first investigate CPPs for peptide-mediated delivery of macromolecules. Despite the existence of thousands of CPP …