Results 171 to 180 of about 5,300 (193)

Spermatogenesi nelle Appendicolarie (Urochordata)

2000
Le Appendicolarie, tunicati planctonici secondi per biomassa solamente ai copepodi, sono cartterizzate da un ciclo vitale rapido che, con un sistema di trasferimento di energia estremamente efficiente, si conclude in circa tre giorni con la maturazione delle gonadi.
CIMA, FRANCESCA, BRENA C., MARTINUCCI G.B., BURIGHEL P.   +3 more
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Vascular and Pericardiac Pressures inAscidiella Aspersa(Urochordata: Ascidiacea)

Journal of the Marine Biological Association of the United Kingdom, 1985
INTRODUCTIONThe heart of tunicates is of physiological interest for several reasons: it is a simple peristaltic tube; it lacks valves; and the direction of the contractions changes periodically thus reversing the direction of blood flow. The phylogenetic importance of tunicates, being invertebrate chordates, also make physiological details of interest.
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Chordata, Urochordata (Tunicata, Manteltiere)

2023
Achim Paululat, Günter Purschke
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Urochordata: Botryllus – Natural Chimerism and Tolerance Induction in a Colonial Chordate

2018
Chimerism is defined as the coexistence of two or more genomes of separate origin within an individual. In placental mammals such as humans, natural chimerism develops during pregnancy between a mother and fetus and has an important role in the induction of fetal tolerance to maternal tissues.
Ayelet Voskoboynik, Aaron M. Newman, Mark Kowarsky, Irving L. Weissman   +3 more
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Aspetti morfo-funzionali dell'epitelio digestivo in Appendicolarie (Urochordata)

1999
Le Appendicolarie, tunicati planctonici, costruiscono ciclicamente un sistema esterno "usa e getta", molto specializzato per la cattura del cibo, svolgendo un ruolo fondamentale nel trasferimento di energia attraverso le catene trofiche degli oceani. A differenza degli ascidiacei, ben poco si conosce sul loro tubo digerente.
CIMA, FRANCESCA, BURIGHEL P., MARTINUCCI G.B.   +2 more
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The Inflammatory Response of Urochordata: The Basic Process of the Ascidians’ Innate Immunity

2018
Ascidians form a widespread marine invertebrate group and are heterogeneous in terms of the taxonomic groups’ evolutionary lineages. The ascidian genomes lack significant homologies for rearranging genes of the vertebrate adoptive immunity. Genome analysis, gene sequencing, and transcriptional profiling have allowed us to disclose upregulation of ...
Parrinello N, Cammarata M, Parrinello D
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An autoradiographic demonstration of blood cell renewal inStyela clava (Urochordata: Ascidiaeea)

Experientia, 1975
The blood cells ofStyela clava were shown by autoradiography with tritiated thymidine to be renewed after several weeks. Proliferating lymphocytes and leucocytes occurred in the lymph nodules and blood channels of the body. Vacuolated cells did not proliferate but differentiated from a precursor cell type.
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Urochordata, n.

2023
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Appendicularians (Urochordata)

2009
Iván A. Castellanos, Álvaro Morales-Ramírez, Eduardo Suárez-Morales   +2 more
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Licht- und elektronenmikroskopische Untersuchungen der Tunika von Cystodytes dellechiajei DELLA VALLE (Urochordata, Ascidiacea)

2002
In der vorliegenden Dissertation wurde mit licht- und elektronenmikroskopischen Methoden die Tunika von Cystodytes dellechiajei (Ascidiacea, Aplousobranchia) histologisch und cytologisch untersucht. Diese koloniebildende Ascidie kommt in zwei Farbvarianten (violette und graugrüne Kolonien) im Mittelmeer vor.
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