Results 131 to 140 of about 924 (173)

Nitrogen metabolism of the South American lungfish Lepidosiren paradoxa

Comparative Biochemistry and Physiology Part B: Comparative Biochemistry, 1972
Abstract 1. 1. Lepidosiren paradoxa, kept in water, either fed or unfed, excretes up to 38 per cent its nitrogenous waste as urea. 2. 2. d -Arginine is hydrolyzed by liver homogenates but l -arginine and guanidinic compounds are not. 3. 3.
N J, Carlisky, A, Barrio
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Blood and inflammatory cells of the lungfish Lepidosiren paradoxa

Fish & Shellfish Immunology, 2007
A special interest exists concerning lungfish because they may possess characteristics of the common ancestor of land vertebrates. However, little is known about their blood and inflammatory cells; thus the fine structure, cytochemistry and differential cell counts of coelomic exudate and blood leucocytes were studied in Lepidosiren paradoxa.
Maria Lucia da S, Ribeiro, Renato A, DaMatta, José A P, Diniz, Wanderley, de Souza, Jose Luiz M, do Nascimento, Tecia Maria U, de Carvalho   +5 more
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Retina of the South American lungfish, Lepidosiren paradoxa Fitzinger

Canadian Journal of Zoology, 1973
The characteristic feature of the retina of Lepidosiren paradoxa is the hugeness (20–25 μm) and sparse-ness of the cells which compose it. The epithelial layer is well pigmented. The visual cells may be classified into rods and single cones which possess a large oil droplet and a smaller paraboloid.
M A, Ali, M, Anctil
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Hypothalamic-hypophysial relationships in the South American lungfish Lepidosiren paradoxa

General and Comparative Endocrinology, 1973
Abstract An analysis of the anatomical relations between the hypothalamus and the hypophysis of the South American lungfish Lepidosiren paradoxa , has shown the coexistence of peptidergic fibers which end on the portal vessels of the median eminence and a direct adrenergic innervation of the glandular cells of the adenohypophysis.
D, Zambrano, F C, Iturriza
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Another Specimen of Lepidosiren paradoxa

Nature, 1888
IT may interest some of your readers to know that I have lately received another specimen of this rare fish from my friend Dr. J. Barbosa Rodriguez, the energetic Director of the Museu Botanico do Amazonas at Manaos. This is the fifth specimen known. A short notice of the fourth specimen, an adult female of large size, caught in the Igarape do Aterro ...
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Respiratory Function in the South American Lungfish, Lepidosiren Paradoxa (Fitz)*

Journal of Experimental Biology, 1967
ABSTRACT Few animal species have aroused as much excitement upon their discovery as the South American lungfish. Its possession of distinct piscine as well as amphibian characters made the animal a link in the transition of vertebrate life from water breathing to air breathing.
K, Johansen, C, Lenfant
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The Development of Lepidosiren paradoxa

Journal of Cell Science, 1902
ABSTRACT In the following pages I give an account of the chief results obtained from my investigation of the development of Lepidosiren, in so far as they relate to the skin and certain organs associated with it. Some structures which ought logically to be described now have been deliberately omitted: such are the external gills, which I
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Thermal Responses of the South American Lungfish, Lepidosiren paradoxa

Copeia, 1980
Intestinal temperatures of nine South American lungfish, Lepidosiren paradoxa (Fitzinger), were monitored following exposures to sudden changes of +6.0 C in water temperature. Body weights were significantly (P < 0.001) correlated with thermal equilibration halftimes (T1/2) in a double logarithmic fashion for both heating and cooling.
Michael J. Pettit, Thomas L. Beitinger
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Memoirs: The Spermatogenesis of Lepidosiren Paradoxa

1911
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
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Morphology of the gill epithelium of the Lungfish, Lepidosiren paradoxa

Cell and Tissue Research, 1974
The gills of Lepidosiren are very much reduced, consisting of a few lobe-like filaments. The gill epithelium differs from most other fish in being 4–7 layers thick. Three varieties of cell are described which occur in the inner epithelial layers. It is suggested that these represent stages in the synthesis of a granular secretory product.
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