منابع مشابه
Photooxidations in Pigmented Blepharisma
1. Blepharisma undulans, a protozoan with a reddish pigment, shows increased oxygen consumption under the influence of light. 2. If the light intensity is high, the animals are killed during a burst of oxygen consumption. 3. If the blepharismas are first bleached by exposure to light of low intensity they show only slightly increased oxygen consumption under the influence of light and they are ...
متن کاملSome Properties of the Pigment of Blepharisma
In connection with measurements of the metabolism of Blepharisma described in the preceding paper, the writer made certain observations on the red pigment of this organism. The pigment of the intact organism defies extraction with any of the common organic solvents, but it may easily be obtained in solution by macerating fresh cells in clean quartz sand and extracting with 90 per cent ethyl alc...
متن کاملDigestion and the Distribution of Acid Phosphatase in Blepharisma
Suspensions of Blepharisma intermedium were fed latex particles for 5 min and then were separated from the particles by filtration. Samples were fixed at intervals after separation and incubated to demonstrate acid phosphatase activity. They were subsequently embedded and sectioned for electron microscopy. During formation of the food vacuole, the vacuolar membrane is acid phosphatase-negative....
متن کاملSome New Cytological Observations in the Heterotrichous Ciliate, Blepharisma
During the course of an experimental, fine structural study of Blepharisma, certain aspects of the normal anatomy of the cell came to our attention. Although Blepharisma is the subject of two recent reports (9, 10), these features have, to our knowledge, hitherto been neglected in the literature. Furthermore, we feel that the present report may serve to clarify some of the recent work on the cl...
متن کاملSome Properties of a Photodynamic Pigment from Blepharisma
1. A pigment can be extracted from Blepharisma undulans by heat treatment of a concentrated suspension of the deeply pigmented animals. 2. In the presence of this pigment, various colorless protozoans are sensitized to light and killed if exposed long enough. The protozoans show a differential sensitivity, some being much more sensitive than others. 3. Bleached colorless blepharismas are not se...
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ژورنال
عنوان ژورنال: Journal of General Physiology
سال: 1949
ISSN: 1540-7748,0022-1295
DOI: 10.1085/jgp.32.4.525