Photoneutron spectrometry by novel multi-directional spherical neutron spectrometry system

Novel urine hepcidin assay by mass spectrometry.

The hepatic peptide hormone hepcidin is the central regulator of iron metabolism and mediator of anemia of inflammation. To date, only one specific immuno-dot assay to measure hepcidin in urine had been documented. Here we report an alternative approach for quantification of hepcidin in urine by surface-enhanced laser desorption/ionization time-of-flight mass spectrometry (SELDI-TOF-MS). Peptid...

NEUTRON SPECTROMETRY AND DOSIMETRY WITH ANNs

Artificial Neural Networks technology has been applied to unfold the neutron spectra and to calculate the effective dose, the ambient equivalent dose, and the personal dose equivalent for Cf and AmBe neutron sources. A Bonner sphere spectrometry with a LiI(Eu) scintillator was utilized to measure the count rates of the spheres that were utilized as input in two artificial neural networks, one f...

Identification of aflatoxins by quadrupole mass spectrometry/mass spectrometry.

MS/MS daughter experiments were recorded for aflatoxins B1, B2, G1, G2, M1, M2, and aflatoxicol, using 3 ionization modes. Daughters were recorded from the molecular ion (M+) using electron impact ionization (EI). Daughters from the protonated molecules (MH+) were recorded in the positive ion mode and the daughters from the molecular anion (M-) were recorded in the negative ion mode using chemi...

Multi-component Voc Analysis by Mass Spectrometry for Controlling Emissions

To comply with local regulations, the vent gases containing solvents from a large pharmaceutical site are treated in an activated carbon adsorption unit. This unit is comprised of three carbon beds, with only one bed being selected for use at any one time, while the other two can be regenerated with steam. Previous operation was based on switching beds at fixed time intervals with monitoring of...

High resolution neutron spectrometry with liquid scintillation detectors