Injury, recovery, and death, in relation to conductivity and permeability . -ponding effects being produced in both cases l?yapproximately the same percentage concentrations,*^that is, chloral hydrate (= M) acts similarlyto chloroform by volume (= M). Stiles and Jorgensen (1914) report a decrease of resistance as theresult of exposure to chloroform. See also Waller, A. D. (1919). No effort was made to find the exact percentages which are requiredto produce given effects, as this was not tlie primary object of the investi-gation. The actual concentration of chloral hydrate
Injury, recovery, and death, in relation to conductivity and permeability . -ponding effects being produced in both cases l?yapproximately the same percentage concentrations,*^that is, chloral hydrate (= M) acts similarlyto chloroform by volume (= M). Stiles and Jorgensen (1914) report a decrease of resistance as theresult of exposure to chloroform. See also Waller, A. D. (1919). No effort was made to find the exact percentages which are requiredto produce given effects, as this was not tlie primary object of the investi-gation. The actual concentration of chloral hydrate may have beensomewhat lower than those given, owing to the presence of water in thechloral hydrate. ANKSTTTOSTA 189 The experiments with alcohol lead to somewhat differ-ent results. In the first place, alcohol is not so toxic asether, chloroform, or chloral hydrate, and higherconcentrations must be used to produce the same effectson permeability. In sea water containing alcohol M,or by volume, (the solution being renewed every X Chlorq/bpm %D % 110-. 100 200 300 MINUTES Fia. 82.—Curve B shows the net electrical resistance of Laminaria agardhii in sea water; Curve A in sea water containing chloroform, Curve C placed for 80 minutes in sea water containing of chloroform and then put back into sea water. 15 minutes) the results were much the same as in Mether (the solution being renewed every 5 minutes),except that the rise in resistance took place more slowly,sometimes occupying 30 minutes or more. It was foundthat ilf, or by volume, is decidedly interesting feature of the results with alcohol isthat the increase of permeability is reversible. If theincrease be carried too far it is not reversible (or at 190 INJURY, RECOVERY, AND DEATH least recovery is incomplete); in the first experimentsthis condition was unintentionally realized and led thewriter to suppose that alcohol behaves like ether. Thecourse of a typical
Size: 1629px × 1533px
Photo credit: © The Reading Room / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookcentury1900, bookdecade1920, booksubjectphysiology, bookyear1
