Oberflächenspannung und Schallgeschwindigkeit

Summary The preceding empirical relation was found between the surface tension of liquids, the specific weight of liquids, and the velocity of sound:=6.3 · 10^{–4 3/2}. In place of the vèocity of sound can be used, with suitable changes in the equation, the compressibility or, in the case of solid substances, the elasticity of the material in question. The range of validity of this relation is so large that it is possible by means of it to calculate the surface tension of solid substances and of gases.     

Über ebene axialsymmetrische Punktmengen

Summary The principal results of the present inquiries are: If a plane quantity of points M has a finite number of symmetrals n, which intersect in a point S, these symmetrals form a regular fascicle of straight lines, with an angle/n of two subsequent symmetrals. If is the angle between two straight lines with the intersection point S, you may or may not supplement them to a regular fascicle of symmetrals of a quantity of points M, by adding a finite number of straight lines, according as represents a rational or irrational multiple of 2. If the angle of two symmetrals of M with the intersection point S is an irrational multiple of 2, there will be to every straight line g through S a symmetral of M, which comprises with g, a small angle of the size you may choose. If M is closed, then in this case every straight line g through S will be a symmetral of M.The symmetrals of a limited quantity of points will intersect in an exact point.

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Die Verfasser sind zur vorliegenden mathematischen Untersuchung durch den Versuch einer mathematischen Behandlung verschiedener Probleme, die Gasausscheidung aus gashältigen Flüssigkeiten betreffend, veranlaßt worden.     

Différenciation électrophorétique de myosines dans les muscles au repos et fatigués,de Mammifères et de Mollusques

Summary Rabbit as well as Mollusks myosin solutions are composed of three electrochemical distinct components:, and myosins, moving with the same speed in both species at definitep _H and ionic strength.Turbidity of myosin solutions is connected with the boundary.After the muscle has been stimulated till exhaustion, the component disappears and the component is very markedly decreased or absent.     

Apparition d'une protéine nouvelle,la contractine,dans les extraits de muscles contractés

Summary When rabbit muscles are fatigued, the electrophoretic pictures of the extracts of these muscles are free from -myosin and show a large decrease in the amount of ₁ and ₂-myosin.When the muscles are contracted by monobromacetate or stimulated and fixed in a contracted state by liquid air, -myosin is very much decreased, ₁ and ₂-myosin disappears entirely, and a new component appears which is called contractin.The disappearance of the classical myosins and the appearance of this new protein in the extracts ofshortened muscles, may be of great interest in the study of the protein changes responsible for muscle contraction.     

Bemerkung über additive Mengenfunktionale

Summary The author analyses the influence of a similar-representationA A of sets of then-dimensional Euclidean space on the value of an additive, translation-invariant functional (A). Under very general suppositions ( A) is a rational integral functions of at most from then ^th degree.     

Nouvelle méthode de séparation des myosinesα etβ

Summary Myosin is insoluble in KAc or NaAc 0.5 m at neutralp _H values and can be easily separated from myosin under these conditions. The yield in myosin is 80 to 90% of the total protein content of our solutions (Weber-Edsall myosin solutions prepared after 20 minutes extraction).     

Séparation,par voie chimique,des myosinesα etβ

Summary It is possible to separate in a state of high electrophoretic purity and homogeneity the and components of myosin solutions by fractionation with ammonium sulfate.The solutions of and myosins differ considerably by their physical properties.     

Etude électrophorétique des variations de composition d'extraits musculaires de Lapin sous l'influence de la fatigue et de la contracture par le monobromacétate de soude

Summary Rabbit muscular globulins soluble between the ionic strengths 0.15 and 0.35 are, in an almost native state, the and myosins ofDubuisson. The extractability of both, and, by salt solutions is greatly reduced when the rabbit muscle has been stimulated to exhaustion or poisoned with the sodium salt of monobromacetic acid till a state of rigor is obtained. This reduction however does not proceed in an absolutely similar way for and, indicating probable functional differences between these two myosins. The other soluble muscular proteins are practically not affected, as far as the method permits this to be assertained.     

Ringschlußversuche mit halogenierten Naphthalinthioglykolsäuren

Summary It has been found that cyclisation of -halogenated -naphthalene-thioglycolic acids can occur in -position with the elimination of the halogen. The influence of the temperature and of a further substituent (halogen) in the second nucleus are discussed.