The Physical Chemistry of the ProteinsLongmans, Green and Company, 1918 - 483 sider |
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Vanlige uttrykk og setninger
10-5 equivalents 30 degrees Abderhalden acetic acid acid or base albumin alkali alkaline earths amino-acids ammonium anions Biochem Biol Brailsford calcium calcium caseinate calculated catalysor cent alcohol cent solution Chap Chem chemical chloride coagulation COH.N colloid compound concentration conductivity constant COOH determined dilute dissociation distilled water edestin egg-albumin employed enzyme equation equilibrium excess experimental f. d. ges fact ferment filtered fluid gelatin Gliadin gram gram of casein groups H₂O hæmoglobin hydrate hydrochloric acid hydrogen hydrolysis inorganic insoluble jelly Journ method mixture molecular molecule NaOH neutral to phenolphthalein nitrogen observed obtained Osborne osmotic pressure ovomucoid paranuclein Pauli pepsin phenolphthalein physical Chem Physiol potassium caseinate precipitate proportion protamin protein ions protein molecule protein salts quantity reaction refractive index Robertson saturated serum globulin Slyke sodium solu soluble solution of casein solutions containing solvent substances substrate sulphate temperature tion trypsin velocity viscosity yields Zeit
Populære avsnitt
Side 315 - The last clause of the v., and we possessed his land, may be regarded as a summary of the subsequent narrative in Dt. (especially 312a). In view of these facts there can be little doubt that the story of 'Og has been incorporated in Nu. from Dt. ; and this accounts for the lack of reference to it in 222 (cf. also Jud.
Side ii - From the point of view of the physicist, a theory of matter is a policy rather than a creed ; its object is to connect or co-ordinate apparently diverse phenomena, and above all to suggest, stimulate and direct experiment.
Side 300 - Hardy draws a far-reaching analogy between this system (and other jellies which are heat-reversible) and the system phenol-water, which, if it contains more than 71 per cent or less than 76 per cent of phenol separates, at temperatures below 80...
Side 114 - ... unity, approximately represented by a fraction proportional to the ratio between the volume occupied by the spheres of influence of the ions and the whole volume of the solution, and may be written as Ac, where A is a constant and c represents the concentration of the solution. The chance that two such ions should be present together is the product of their separate chances, that is (Ac)2. Similarly, the chance for the conjunction of three ions is (Ac)3, and for the conjunction of n ions (Ac)".
Side 38 - ... (6 cc. of strong reagent diluted to 1 liter). When the solution is complete, the whole is filtered through a thick layer of absorbent cotton. The casein is then precipitated again with dilute acetic acid; the precipitate is allowed to settle, and is then washed, redissolved in dilute ammonium hydroxide, and filtered, the process of precipitation, washing, dissolving, etc., being repeated not less than four times.
Side 9 - Schiitzenberger in 1S8S carried out one of the earliest and most successful attempts to synthesize bodies of a protein character. Recognizing that the decomposition of proteins into amino-acids is essentially a phenomenon of hydrolysis, he regarded .dehydration as an essential feature of any attempt at protein synthesis, while the abundance of amino-acids among the products of protein hydrolysis, and the presence therein...
Side 346 - If chloroform be shaken up with casein, gelatin, or protamin solutions it settles in fine particles or droplets, which, if numerous, form a milky layer at the bottom of the vessel ; by transmitted light, however, they appear perfectly clear. These droplets are extraordinarily stable, and do not coalesce, however long they stand in contact; they may be repeatedly washed in water until all traces of protein have been removed from the supernatant fluid, and they still remain perfectly stable and distinct...
Side 114 - In a solution where ions are moving freely, the probability that an ion is at any instant within reach of a fixed point is, putting certainty equal to unity, approximately represented by a fraction proportional to the ratio between the volume * Journal of Physiology, xxiv.
Side 38 - HC1, sp. gr. 1.20, diluted to 1 liter) until the casein is precipitated. The precipitate is washed with distilled water until free from chloride and is then placed on a hardened filter paper in a Buchner funnel, as much water as possible being now removed from the precipitate by suction.
Side 38 - ... hardened filter paper in a Buchner funnel, as much water as possible being now removed from the precipitate by suction. The mass is next transferred to a large mortar and thoroughly triturated with 95 per ct. alcohol. The alcohol is then removed by suction on a Buchner funnel and the casein is then again placed in a mortar and triturated with absolute alcohol. Most of the alcohol is removed by filtration and the...