Results 111 to 120 of about 626 (136)

Glycogen in lens of tunicate tadpole (Chordata: Ascidiacea)

Journal of Experimental Zoology, 1972
AbstractThe larval eye (cerebral ocellus) of an ascidian, Ciona intestinalis, possesses a lens of three cells: in the center of each is a large granular body. Several lines of evidence indicate that the lens bodies are composed of beta particles of glycogen.
R M, Eakin, A, Kuda
openaire   +2 more sources

Unusual chelates isolated from Ascidiacea

Pure and Applied Chemistry, 1988
Abstract
openaire   +2 more sources

Antileukemic effects of Didemnum psammatodes (Tunicata: Ascidiacea) constituents

Comparative Biochemistry and Physiology Part A: Molecular & Integrative Physiology, 2008
Chemical investigation of the methanolic extract of the ascidian Didemnum psammatodes has led to the identification of fourteen known compounds: three methyl esters (methyl myristate, methyl palmitate and methyl stearate), four steroids (cholesterol, campesterol, stigmasterol and beta-sitosterol), two fatty acids (palmitic acid and stearic acid), three
Renata, Takeara, Paula Christine, Jimenez, Diego Veras, Wilke, Manoel, Odorico de Moraes, Cláudia, Pessoa, Norberto, Peporine Lopes, João Luis Callegari, Lopes, Tito, Monteiro da Cruz Lotufo, Letícia Veras, Costa-Lotufo   +8 more
openaire   +2 more sources

Antarctic Ascidiacea II

2013
This chapter contains sections titled: Introduction Station list Preservation of ascidians.
openaire   +2 more sources

Chromosome number within the class Ascidiacea

Marine Biology, 1974
Additional evidence has been obtained that demonstrates the low capacity of ascidians to polyploidize. The evolution of ascidians appears to have been accompanied by a decrease of chromosome number within the Phlebobranchiata, and by both a decrease and increase of chromosome number in the other two suborders, Aplousobranchiata and Stolidobranchiata ...
openaire   +1 more source

Chemotactic Responses of Tunicate (Urochordata, Ascidiacea) Hemocytesin Vitro

Journal of Invertebrate Pathology, 1998
A number of molecules were found to alter the motility of tunicate hemocytes. Bacterial lipopolysaccharide (LPS) significantly enhanced cell mobility relative to non-stimulated controls. Responses to LPS were not directional and so represented chemokinesis.
D A, Raftos, D L, Stillman, E L, Cooper
openaire   +2 more sources

Cupular sense organs in Ciona (Tunicata: Ascidiacea)

Journal of Zoology, 1978
The cupular organs of the atrial (exhalent) siphon of Ciona have been studied with scanning and transmission microscopy and are shown to resemble those of the vertebrate acoustico‐lateralis system in several respects. The sensory cells are ciliated, and their cilia are apparently non‐motile, having a modified inner tubular array.
Q. Bone, K. P. Ryan
openaire   +1 more source

Acrosome differentiation inMolgula manhattensis (Ascidiacea, Tunicata)

Journal of Ultrastructure Research, 1985
The acrosome ofMolgula manhattensis spermatozoa is a moderately electron-dense slightly depressed sphere, which is enclosed by a unit membrane. It is approximately 80 × 80 × 40 nm in length, width, and height, respectively. Neither a subacrosomal substance nor a perforatrium can be identified between the acrosome and the nuclear envelopes. During early
openaire   +1 more source

Die Gattung Atopogaster Herdman (Ascidiacea)

1921
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
openaire   +1 more source

La formation des spicules de Didemnidae (Ascidiacea)

Canadian Journal of Zoology, 1995
The spicules of didemnids ascidians are concretions made of calcium carbonate in the form of aragonite. Their origin and composition have been analyzed by electron microscopy, electron probe microanalysis, and secondary ion mass spectroscopy. Our results, both morphologic and microanalytic, confirm clearly the intracellular origin of the spicules.
C. Ballan-Dufrançais, M. Truchet, A. Y. Jeantet   +2 more
openaire   +1 more source