10 Result(s)
within
J. D. SMYTH
Science, Humanities and Social Sciences, multidisciplinary
-
Article
Parasites
Animal Parasites.
-
Article
Secretory Activity by the Scolex of Echinococcus granulosus in vitro
DURING recent work on the in vitro cultivation of the hydatid organism, Echinococcus granulosus, observations were made on living 35-day-old strobila freshly removed from the intestine of dogs. Strobila were exam...
-
Article
Endocrine Control of Sexual Reproduction in Opalina ranarum Parasitic in Rana temporaria
IT is well known that opalinids parasitizing the recta of Amphibia multiply asexually by binary fission during most of the year. During the breeding season, however, the reproductive pattern changes to a sexua...
-
Article
Parthenogenetic Development of Eggs from a Cestode Cultured Aseptically in vitro
IT has been shown that plerocercoid larvæ of the cestodes Schistocephalus solidus and Ligula intestinalis may be cultured to maturity in vitro in liquid media at 40° C. under sterile conditions. In the early expe...
-
Article
Development of Cestodes in vitro: Production of Fertile Eggs; Cultivation of Plerocercoid Fragments
PLEROCERCOID larvæ of Schistocephalus solidus and Ligula intestinalis, when removed aseptically from their respective fish hosts by means of a special technique, develop into sexually mature tapeworms if cultured...
-
Article
Golgi Apparatus by Phase Contrast Microscopy
THE phase contrast optical system1,2,3,4 is little known in Britain, and not many observations5,6 of biological material by means of it have been reported. The system enables many structural details of living cel...
-
Article
Localization of Vitamin C in Belascaris marginata
THE distribution of vitamin C in many vertebrate tissues is now well known, but excepting the Protozoa, knowledge of its localization in invertebrate tissues is somewhat limited, and no work, to our knowledge,...
-
Article
Golgi Apparatus in Astasia Harrisii
IT is well known that in numerous Protozoa, the contractile vacuole is associated with an osmiophile cortex, which is believed to be homologous with the Golgi apparatus of metazoan cells. In Paramecium, it has...
-
Article
Structure of the Branchiæ of Careinus maenas
NOTHING is known concerning the histology of the branchiæ of Cardnus mænas, except for a brief account using Bouin-fixed material1. By fixation in Champy, whole-mount preparations of strips of a lamella stained i...
-
Article
Nomenclature of Fowl Genetics
THE nomenclature of fowl genetics has become somewhat confused in recent years. So many characters have been investigated that the difficulty of designating symbols for the corresponding genes has increased co...
