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Ecological Energetics of the Dobson Fly, Corydalus Cornutus

Description: Rates and energies of consumption (C), egestion (F), assimilation (A), respiration (R), growth (Pg), production of exuviae (Pev), and production of egg masses (Pr) and associated efficiencies, and the effects of seasonal temperature, weight and metamorphic stage upon these factors were examined for a typical individual and cohort of Corydalus cornutus (L.) from a stream in North-Central Texas (330 23'N, 97*5'W). Dobson flies are apparently univoltine in the study area, with 11 larval instars. E… more
Date: December 1974
Creator: Brown, Arthur V.
Partner: UNT Libraries
open access

Effects of Shoot X-Irradiation on Water Uptake by Single Isolated Roots of Intact Onion Plants

Description: Using a micro-potometric method, it was ,found that X-irradiation (400 R - 18 Kr) of the shoots of the onion plant Allium cepa will produce an immediate, pronounced (200%) and reversible enhancement of the water uptake by the shielded roots. Unfiltered X-irradiation.(1200 R/min., 120 KVP, 5 ma) was delivered at right angles to the shoot. Readings were taken at 10-minute intervals before, and immediately following X-irradiation. The greatest enhancement occurred at dosages between 4.8 Kr (150%) … more
Date: December 1974
Creator: Chang, Fu-Hsian
Partner: UNT Libraries
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