Search Results - "Cody, Robert B."

Amino Acid Composition Determination From the Fractional Mass of Peptides by Downard, Kevin M., Cody, Robert B.

“…ABSTRACT A peptide's fractional mass is directly associated with its elemental composition and thus amino acid composition. Here it is demonstrated that a…”
Get full text

Paper spray and Kendrick mass defect analysis of block and random ethylene oxide/propylene oxide copolymers by Cody, Robert B., Fouquet, Thierry

“…Paper spray ionization coupled with a high-resolution time-of-flight mass spectrometer was applied to the analysis of 13 block and 2 random ethylene…”
Get full text

Graphical Ranking of Divisors to Get the Most out of a Resolution-Enhanced Kendrick Mass Defect Plot by Nakamura, Sayaka, Cody, Robert B, Sato, Hiroaki, Fouquet, Thierry

“…Resolution-enhanced Kendrick Mass Defect (KMD) analysis using the new concept of fractional base units (repeating unit R divided by integer X; R/X as a…”
Get full text

Carbon-carbon double bond position elucidation in fatty acids using ozone-coupled direct analysis in real time mass spectrometry by Cetraro, Nicolas, Cody, Robert B, Yew, Joanne Y

“…The carbon-carbon double bond positions of unsaturated fatty acids can have markedly different effects on biological function and also serve as biomarkers of…”
Get more information

Versatile New Ion Source for the Analysis of Materials in Open Air under Ambient Conditions by Cody, Robert B., Laramée, James A., Durst, H. Dupont

“…A new ion source has been developed for rapid, noncontact analysis of materials at ambient pressure and at ground potential. The new source, termed DART (for…”
Get full text

On the Kendrick Mass Defect Plots of Multiply Charged Polymer Ions: Splits, Misalignments, and How to Correct Them by Fouquet, Thierry N. J., Cody, Robert B., Ozeki, Yuka, Kitagawa, Shinya, Ohtani, Hajime, Sato, Hiroaki

“…The Kendrick mass defect (KMD) analysis of multiply charged polymeric distributions has recently revealed a surprising isotopic split in their KMD plots—namely…”
Get full text

Plant Seed Species Identification from Chemical Fingerprints: A High-Throughput Application of Direct Analysis in Real Time Mass Spectrometry by Lesiak, Ashton D, Cody, Robert B, Dane, A. John, Musah, Rabi A

“…Plant species identification based on the morphological features of plant parts is a well-established science in botany. However, species identification from…”
Get full text

Soft Ionization of Saturated Hydrocarbons, Alcohols and Nonpolar Compounds by Negative-Ion Direct Analysis in Real-Time Mass Spectrometry by Cody, Robert B., Dane, A. John

“…Large polarizable n- alkanes (approximately C18 and larger), alcohols, and other nonpolar compounds can be detected as negative ions when sample solutions are…”
Get full text

Cuticular hydrocarbons for identifying Sarcophagidae (Diptera) by Moore, Hannah E., Hall, Martin J. R., Drijfhout, Falko P., Cody, Robert B., Whitmore, Daniel

“…The composition and quantity of insect cuticular hydrocarbons (CHCs) can be species-specific as well as sexually dimorphic within species. CHC analysis has…”
Get full text

Spatial distributions of furan and 5-hydroxymethylfurfural in unroasted and roasted Coffea arabica beans by Fowble, Kristen L., Okuda, Koji, Cody, Robert B., Musah, Rabi A.

“…For the first time, the spatial distributions of the highly volatile compounds furan and 5-hydroxymethylfurfural (HMF) have been determined in cross sections…”
Get full text

Cuticular hydrocarbon analysis of an awake behaving fly using direct analysis in real-time time-of-flight mass spectrometry by Yew, Joanne Y, Cody, Robert B, Kravitz, Edward A

“…In mammals and insects, pheromones strongly influence social behaviors such as aggression and mate recognition. In Drosophila melanogaster, pheromones in the…”
Get full text

Paper spray ionization for ambient inorganic analysis by Cody, Robert B., Dane, A. John

“…RATIONALE The feasibility of using paper spray ionization as an ambient ionization method for inorganic analysis was investigated. METHODS Aqueous solutions…”
Get full text

Molecular Characterization of Volatiles and Petrochemical Base Oils by Photo-Ionization GC×GC-TOF-MS by Giri, Anupam, Coutriade, Marion, Racaud, Amandine, Okuda, Koji, Dane, John, Cody, Robert B, Focant, Jean-François

“…The characterization of organic mixtures by comprehensive two-dimensional gas chromatography (GC×GC) coupled to electron impact (EI) ionization time-of-flight…”
Get full text

Rapid detection by direct analysis in real time-mass spectrometry (DART-MS) of psychoactive plant drugs of abuse: The case of Mitragyna speciosa aka “Kratom” by Lesiak, Ashton D, Cody, Robert B, Dane, A. John, Musah, Rabi A

“…Graphical abstract…”
Get full text

A High Throughput Ambient Mass Spectrometric Approach to Species Identification and Classification from Chemical Fingerprint Signatures by Musah, Rabi A., Espinoza, Edgard O., Cody, Robert B., Lesiak, Ashton D., Christensen, Earl D., Moore, Hannah E., Maleknia, Simin, Drijfhout, Falko P.

“…A high throughput method for species identification and classification through chemometric processing of direct analysis in real time (DART) mass…”
Get full text

Direct analysis in real time high resolution mass spectrometry as a tool for rapid characterization of mind-altering plant materials and revelation of supplement adulteration – The case of Kanna by Lesiak, Ashton D, Cody, Robert B, Ubukata, Masaaki, Musah, Rabi A

“…Highlights • Rapid screening methodology for herbal supplements is reported. • Sceletium tortuosum products were identified by their unique chemical…”
Get full text

Observation of Molecular Ions and Analysis of Nonpolar Compounds with the Direct Analysis in Real Time Ion Source by Cody, Robert B

“…Positive ions in the direct analysis in real time (DART) ion source are commonly formed by proton transfer. However, the DART source is similar to atmospheric…”
Get full text

Characterization of Solid Counterfeit Drug Samples by Desorption Electrospray Ionization and Direct-analysis-in-real-time Coupled to Time-of-flight Mass Spectrometry by Fernández, Facundo M., Cody, Robert B., Green, Michael D., Hampton, Christina Y., McGready, Rose, Sengaloundeth, Sivong, White, Nicholas J., Newton, Paul N.

“…Vacuum is not the limit: direct analysis in real time (DART), a new MS ionization method, allows probing of pharmaceuticals under atmospheric pressure, thus…”
Get full text

Rapid classification of White Oak (Quercus alba) and Northern Red Oak (Quercus rubra) by using pyrolysis direct analysis in real time (DART™) and time-of-flight mass spectrometry by Cody, Robert B., Dane, A. John, Dawson-Andoh, Benjamin, Adedipe, Emmanuel Oluwatosin, Nkansah, Kofi

“…► Direct analysis in real time (DART) mass spectrometry for classifying Red and White Oak. ► Negative-ion pyrolysis DART mass spectra show significant…”
Get full text

Two-Dimensional Gas Chromatographic and Mass Spectrometric Characterization of Lipid-Rich Biological MatricesApplication to Human Cerumen (Earwax) by Coon, Allix M, Dane, A. John, Setzen, Gavin, Cody, Robert B, Musah, Rabi A

“…Earwax is a readily accessible biological matrix that has the potential to be used in disease diagnostics. However, its semisolid nature and high chemical…”
Get full text