. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 40 HUBERT FRINGS effective a stimulating agent than is hydrochloric acid at the same pH. The ratio for this species is 20: 1. which compares favorably with Eger's (1937) report for another species of a ratio averaging about 23 : 1. This ratio is comparable to that for humans (28: 1), and Eger suggests that it indicates a similarity in the buffer- ing capacities of the salivas of the two species. It further, however, suggests a similarity of action in both, and may indicate a sensitivity to hydronium ion in these caterpillars
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 40 HUBERT FRINGS effective a stimulating agent than is hydrochloric acid at the same pH. The ratio for this species is 20: 1. which compares favorably with Eger's (1937) report for another species of a ratio averaging about 23 : 1. This ratio is comparable to that for humans (28: 1), and Eger suggests that it indicates a similarity in the buffer- ing capacities of the salivas of the two species. It further, however, suggests a similarity of action in both, and may indicate a sensitivity to hydronium ion in these caterpillars corresponding to the sour taste in humans. Salts The order of relative stimulative efficiencies, as measured by the reciprocals of the normalities of the rejection limens, for the various cations, as chlorides, gives the series: NH4+ : K+ > Ca++ > Na+ > Li+. This series can be verified further by checking the orders for the twelve in- dividuals to determine in how many cases any specific cation has an equal, greater, £.0 ,0 30 40 50 60 70 60 LIMITING EQUIVALENT IONIC CONDUCTANCES FIGURE 1. Showing the relationship between the stimulative efficiencies of the cations, as chlorides, and their limiting' equivalent ionic conductances in Mhos at 25° C. Values for the latter are from Gucker and Meldrum (1942). or lesser stimulative efficiency than any other cation. Using this method, it is found that K> has a greater efficiency than NH4+ (K+ ] > NH4+) in 4 individuals, NH4+ has greater than K> (K+ Na+ - 9. K+ : = Na+ -- 3, K+ Na+ - 8, NH.,+ = Na^ 4, NH4+ Na+ -- 0. These clearly show that K+ and NH4+ have greater stimulative efficiencies than Naf, and further confirm their equality. Comjjaring Na1 with Li', the following are found: Na+ > Li' -9, Na1" - Li+ - 3, Xa+ < ; Li+ -- 0. Obviously. Xa is more stimulating than Lif. K+ and NH4+ are. Please note that these images are extracted from scanned page images that may have been digitally enhanc
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
