Ethylene Production from Propanal

Real-time trace gas sensing of ethylene, propanal and acetaldehyde from human skin in vivo.

Trace gases emitted by human skin in vivo are monitored non-invasively and in real time using laser-based photoacoustic detection and proton-transfer reaction mass spectrometry. A small quartz cuvette is placed on the skin to create a headspace from which a carrier gas transports the skin emissions to the detection systems. The transparency of quartz to ultraviolet radiation (UVR) allows invest...

Ethylene production from peptides and protein containing methionine.

It has been reported that the C0-C4 carbons of methionine are converted to ethylene in FMN-light (23) and Cu"!-ascorbate (10) model systems. Yang (22) has shown that C-C, carbons of 2-keto-4-methylthiobutyrate and the Cr, carbons of 3-methylthiopropionaldehyde (i.e., methional) are converted to ethylene in a model peroxidase system. When methionine was fed to apple tissue, the C-C4 carbons were...

Ethylene and Ethane Production from Sulfur Dioxide-injured Plants.

After alfalfa (Medicago sativa) seedlings were exposed to approximately 0.7 microliter per liter SO(2) for 8 hours, elevated ethylene and ethane production was observed. Ethylene production peaked about 6 hours and returned to control levels by about 24 hours following the fumigation, while ethane production peaked about 36 hours and was still above control levels 48 hours after the fumigation....

Biomediated Production of Ethylene Glycol

Methods to break down hemicellulose contained in biomass into simple 5-carbon sugars are well documented. This invention comprises an enzymatic reaction scheme to convert the simple sugars (e.g., xylose, arabinose, etc.) to ethylene glycol in three stages. First, the sugar is cleaved enzymatically into glycolaldehyde and dihydroxyacetone phosphate. Second, dihydroxyacetone -a byproduct from the...

Fruit Respiration and Ethylene Production.