Laboratory smog chamber experiments have been carried out to investigate secondary organic aerosol (SOA) formation from the photooxidation of naphthalene and its methyl analogs, 1and 2-methylnaphthalene (1-MN and 2MN, respectively). Laboratory smog chamber irradiations were conducted in a flow mode to ensure adequate collection of the aerosol at reasonably low reactant concentrations and in the...

Introduction: It has long been known that insoluble organic matter (IOM) in carbonaceous chondrites is complex and macromolecular in nature, and that it constitutes the major portion of chondritic organics. Structural characterization of IOM is one of the most important approaches for determining the formation process of the IOM. Recent NMR analyses of the IOM [1, 2, 3, 4] from a variety of car...

Chilling injury is sustained by dry pollen of Typha latifolia L. upon hydration in germination medium at 0°C. This injury is evidenced as poor germination, low vigor, and depressed respiration. Isolated mitochondria showed multiple sites of impaired electron transport. Besides losses of cytochrome (Cyt) c and NAD+, the activities of membrane-bound enzyme complexes such as Cyt oxidase, NADH-duro...

The absorption and metabolism of dietary nucleic acids have received less attention than those of other organic nutrients, largely because of methodological difficulties. We supplemented the rations of poultry and mice with the edible alga Spirulina platensis, which had been uniformly labeled with '3C by hydroponic culture in 13CO2. The rations were ingested by a hen for 4 wk and by four mice f...

Studies designed to compare valproic acid (VPA) with its -fluorinated derivative (F-VPA) for their abilities to form acyl-CoA thioester derivatives in vivo are described. Recent studies have shown that -fluorination of a hepatotoxic metabolite of VPA ( -VPA) resulted in a nonhepatotoxic derivative. We hypothesize that the decrease in hepatotoxicity may be related to a lack of formation of the i...