منابع مشابه
Failure to Find Intercellular Protoplasmic Continuity in Griffithsia Globulifera
A method was devised for estimtaing the electrical resistance between the cytoplasm of adjacent cells of the red marine alga Griffithsia globulifera. A very high resistance was found, which argues strongly against the existence of protoplasmic continuity in this species.
متن کاملProtoplasmic Potentials in Halicystis
The potential difference across the protoplasm of impaled cells of two American species of Halicystis is compared. The mean value for H. Osterhoutii is 68.4 mv.; that for H. ovalis is 79.7 mv., the sea water being positive to the sap in both. The higher potential of H. ovalis is apparently due to the higher concentration of KCl (0.3 M) in its vacuolar sap. When the KCl content of H. Osterhoutii...
متن کاملSalt tolerance & protoplasmic salt hardiness of various woody & herbaceous ornamental plants.
The interest in salt tolerance of plants, especially those of economic importance, is increasing as more saline lands are brought under cultivation, and as saline irrigation waters add to the salinity of cultivated soils. Research relating to the survival and growth of plants growing on soils containing excessive soluble salts has left many problems unsolved. The task of obtaining and selecting...
متن کاملProtoplasmic Theory of Life
an inaugural address delivered by him in the year 1874, as President of the Microscopical Society of Liverpool. In it he endeavours to prove that the modern views concerning the nature of life were anticipated by the late Dr. John Fletcher, of Edinburgh, in 1835, in his work entitled Rudiments of Physiology. We think, however, that his claim to be the discoverer of the Protoplasmic Theory is as...
متن کاملSome Properties of Protoplasmic Gels
The chloroplast of Spirogyra is a long, spirally coiled ribbon which may contract to form a short, nearly straight rod. This happens under natural conditions and it can also be produced by a variety of inorganic salts and by some organic substances. It also occurs when the chloroplast is freed by centrifugal force from the clear peripheral protoplasm which is in contact with the cellulose wall....
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ژورنال
عنوان ژورنال: Nature
سال: 1884
ISSN: 0028-0836,1476-4687
DOI: 10.1038/030216a0