Results 101 to 110 of about 3,793 (125)
Some of the next articles are maybe not open access.
Glycogen deposits in the pyloric gland of the ascidian Styela clava (Urochordata)
Cell and Tissue Research, 1977The pyloric gland of Styela clava contains large glycogen deposits that are digested by treatment with alpha amylase and depleted by 15 days starvation. The deposits are surrounded by cytoplasmic regions containing smooth endoplasmic reticulum and mitochondria.
openaire +2 more sources
Spermatogenesi nelle Appendicolarie (Urochordata)
2000Le 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 +3 more
openaire +1 more source
Vascular and Pericardiac Pressures inAscidiella Aspersa(Urochordata: Ascidiacea)
Journal of the Marine Biological Association of the United Kingdom, 1985INTRODUCTIONThe 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.
openaire +1 more source
Chordata, Urochordata (Tunicata, Manteltiere)
2023Achim Paululat, Günter Purschke
openaire +1 more source
Urochordata: Botryllus – Natural Chimerism and Tolerance Induction in a Colonial Chordate
2018Chimerism 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 +3 more
openaire +1 more source
Aspetti morfo-funzionali dell'epitelio digestivo in Appendicolarie (Urochordata)
1999Le 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 +2 more
openaire +1 more source
The Inflammatory Response of Urochordata: The Basic Process of the Ascidians’ Innate Immunity
2018Ascidians 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
openaire +2 more sources
An autoradiographic demonstration of blood cell renewal inStyela clava (Urochordata: Ascidiaeea)
Experientia, 1975The 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.
openaire +1 more source