منابع مشابه
Rhythmic Banding of Precipitates (liesegang’s Rings)
Rhythmic banding of precipitates was first discussed by Raphsel E. Liesegang (1)) hence the name “Liesegang’s rings.” He observed that when a solution of silver nitrate is placed on a gelatine gel containing dilute potassium bichromate, rhythmic banding of the precipitate occurs. If the solutions are in a dish or on a plane surface the precipitate is in concentric rings; if in a test-tube, supe...
متن کاملSubmicroscopic Morphology of Protoplasm
SUBMICROSCOPIC MORPHOLOGY OF PROTOPLASM. By A. Frey-Wyssling. 2d English Ed. Houston, Elsevier, 1953. 411 pp., 181 figs. $8.00. This is really the third edition of Frey-Wyssling's famous monograph, for the first English edition (1948) was actually a revision of the original German edition (1938). Following an orienting introduction, the book is divided, as in previous editions, into three parts...
متن کاملChanges of Apparent Ionic Mobilities in Protoplasm
The normal P.D. across the protoplasm of Valonia macrophysa is about 10 mv. negative (inwardly directed). On adding 0.01 M guaiacol to the sea water the P.D. becomes positive and then slowly returns approximately to the normal value. In many cases this behavior is not much affected by raising the pH and so increasing the concentration of the guaiacol ion but in other cases such an increase make...
متن کاملThe Effect of Bacteriophagy Upon Protoplasm (Paramecium) *
Paramecia have been used as experimental animals in many fields of biology, including bacteriology and immunology. The use of protozoa to reveal protoplasmic response has many advantages, not the least of which is the ease with which they may be cultivated in large numbers and subjected to study. They react admirably to physical and chemical changes in their environment. They can be observed mi...
متن کاملSome Protein Properties of Plant Protoplasm.*
IN attempting to explain the reactions and behaviour of living organisms, the experimental biologist is often tempted to fall back on the causal consideration of the observed phenomena in terms of the single living cell. While it is true that our physiological knowledge of this unit is almost negligible, there is at any rate a widely accepted belief that its properties may often be expressed in...
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ژورنال
عنوان ژورنال: CYTOLOGIA
سال: 1941
ISSN: 0011-4545,1348-7019
DOI: 10.1508/cytologia.11.332