Singlet dihydroxycarbene (HOC̈OH) is produced via pyrolytic decomposition of oxalic acid, captured by helium nanodroplets, and probed with infrared laser Stark spectroscopy. Rovibrational bands in the OH stretch region are assigned to either trans,trans- or trans,cis-rotamers on the basis of symmetry type, nuclear spin statistical weights, and comparisons to electronic structure theory calculati...

Four fungi of the Aspergillus flavus group were differentiated to the species level and strain level by pyrolysis-gas-liquid chromotography. Comparisons of pyrochromatograms revealed more similarities than dissimilarities among both species and strains in the pyrolytic elution patterns. Quantitative analysis was made by comparing the number of peaks in which two strains or reference species agr...

The nucleation and bulk growth of polycrystalline SiC in a 2 inch PVT setup using isostatic and pyrolytic graphite as substrates was studied. Textured nucleation occurs under near-thermal equilibrium conditions at the initial growth stage with hexagonal platelet shaped crystallites of 4H, 6H and 15R polytypes. It is found that pyrolytic graphite results in enhanced texturing of the nucleating g...

BACKGROUND Despite current interest in the biology and diagnostic applications of cell-free DNA in plasma and serum, the cellular origin of this DNA is poorly understood. We used a sex-mismatched bone marrow transplantation model to study the relative contribution of hematopoietic and nonhematopoietic cells to circulating DNA. METHODS We studied 22 sex-mismatched bone marrow transplantation p...

n vertebrate cells, not all potential DNA replication origins fire in each S phase, but it is unclear what parameters control that decision. Mauro Anglana, Michelle Debatisse (Institut Curie, Paris, France), and colleagues find that nucleotide availability can determine which origins are activated. Under normal conditions (when nucleotides were readily available), initiation occurred predominan...

n vertebrate cells, not all potential DNA replication origins fire in each S phase, but it is unclear what parameters control that decision. Mauro Anglana, Michelle Debatisse (Institut Curie, Paris, France), and colleagues find that nucleotide availability can determine which origins are activated. Under normal conditions (when nucleotides were readily available), initiation occurred predominan...

n vertebrate cells, not all potential DNA replication origins fire in each S phase, but it is unclear what parameters control that decision. Mauro Anglana, Michelle Debatisse (Institut Curie, Paris, France), and colleagues find that nucleotide availability can determine which origins are activated. Under normal conditions (when nucleotides were readily available), initiation occurred predominan...