Isotonic Aqueous Solution Research Articles

Microcalorimetric measurement of the enthalpies of transfer of a series of m-alkoxyphenols from isotonic aqueous solution to escherichia coli cells

Enthalpies of interactions of a series of m-alkoxyphenols with non-growing Escherichia coli suspended in a salt solution have been recorded. These data have been analysed on the assumption that the initial relatively rapid endothermic process represented the transfer of solute from aqueous solution to cells (ΔHtrs) and that the subsequent relatively lengthy exothermic process resulted from the biological consequences of the transfer process itself. The derived values are compared with values of ΔHtrs found for transfer of these solutes from water to octan-1-ol, heptane and propylene carbonate.

On morphological stability of planar phase boundaries during unidirectional transient solidification of binary aqueous solutions

This paper deals with the stability of planar phase boundaries during transient solidification of binary aqueous solutions and raises the question of the time and wavenumber characterizing t he breakdown of the phase boundaries in these solidification processes. In the first part a linear stability analysis is performed. The central result of this analysis is a dynamical stability criterion that fixes the time of first marginal instability. This criterion is an equivalent formulation to the well-known Mullins-Sekerka criterion, that enables the specific wave number of the first instability to be calculated. In the second part of this paper these criteria are used to determine the breakdown of planar phase boundaries in a special transient freezing situation of an isotonic aqueous solution of sodium chloride.

Concentration of Fluorescein in Tear Fluid after Instillation as Eye-Drops

Fluorescein was administered in isotonic aqueous and viscous solutions as eye-drops to volunteers in two age groups. The fluorescein concentration was measured in samples of tear fluid taken at regula

Prolonged bronchoclysis; technique.

The favorable results obtained with intrabronchial instillation of chemotherapeutic products and antibiotics in the treatment of bronchial suppurations, according to our experience and that of others, led us to infer that in some resistant cases and in tuberculous bronchial lesions continuous administration could be useful. On surveying the current literature, I read a paper by Mendelbaum, according to which the author instilled isotonic aqueous solutions into the bronchus through a semirigid and radiopaque catheter positioned by the transglottical route amounts up to 300 cc., at the rate of 40 drops per minute. The Process lasted not more than three hours, and the treatment was carried out daily. Separately, Winternitz and Smith have demonstrated experimentally with dogs that it is possible to introduce 6 liters of isotonic saline solution in two hours by the intrabronchial route, without evidence of macroscopical or microscopical lesions. The problem in a prolonged bronchial intubation was

カリウム鹽注射によるシオフキの放卵放精現象

It is always able to induce Mactra veneriformis to discharge the reproductive substances by the injection of the isotonic aqueous solution of KC1 into ist visceral cavity. Mactra discharges the reproductive substances immediately or in a few minutes after the injection. It reaches the maximum discharge soon after the beginning of its reaction, and afterwards decreases gradually the quantity. In some cases the duration of discharge lasted more than 2 hours. Less than 1.5cc of the isotonic solution of KC1 is sufficient to induce the discharge. No distinct relation can be found between the size of bivalve and the least amount of KC1 solution necessary for the induction of the discharge. The female, however, has the tendency of the discharge by the injection of less amounf of KC1 solution than the male reacts. The neutral K-salts such as KBr, KNO3, K2SO4 are all effective to induce the discharge, while CaCl2, MgSO4 and sea water are not so much effective as K-salts. The results of my experiment suggest that the K-contracture of gonad muscle fibres, caused by the injection of K-salt solutions, seems to induce in the main to discharge the reproductive substances of Mactra.

Isotonic aqueous iodine solution as a skin antiseptic

Isotonic aqueous iodine solution as a skin antiseptic