Search PubMed⌕ Search

Biomedical subjects

P Harris

Publications and source records attributed to P Harris.

At least 433 records · Page 24Linked to original sources
PubMed1969

Mosquitoes feeding on insect larvae.

Caged Aedes aegypti and Culex tarsalis are attracted to insect larvae, engorge on their body fluids, and produce viable eggs. Attractiveness of the larvae is related to their size, shape, and color but not to their movement. The possibility that wild mosquitoes substitute insect hemolymph for vertebrate blood is discussed.

Aedes↗
PubMed1969

The effect of low temperatures on fatty acid biosynthesis in plants.

1. Of three systems, bulb tissue, plant leaf tissue and intact green algal (Chlorella vulgaris) cells, only the former shows an increase in rate of formation of unsaturated fatty acids with decrease in temperature. 2. In bulb tissue the oxygen concentration is rate-limiting for synthesis of unsaturated fatty acids at temperatures down to 10 degrees . 3. At elevated oxygen concentrations the formation of unsaturated fatty acids in bulb tissue increases with temperature. 4. The failure of photosynthetic tissues to respond to either lower temperatures or increased oxygen concentrations in the presence of light is attributed to photosynthetic production of excess of oxygen. This is supported by the fact that in the dark a potentiating oxygen effect on the formation of unsaturated fatty acids can be demonstrated. 5. The HCO(3) (-) ion concentration has a small effect on the formation of unsaturated fatty acids. 6. Elevated content of unsaturated acids at lower temperatures in plants is attributed to increases in oxygen concentration in solution.

Acetates↗