(1) The fertilization reaction of echinoderm eggs (Lytechinus pictus, a sea urchin, and Dendraster excentricus, a sand dollar) was followed with intracellular electrodes.
(2) I describe the anatomy and fine structure of the echinoderm ovary, with emphasis on both the cellular relationships of the germ line cells to the somatic cells of the inner epithelium, and on the neuromuscular systems.
(3) In echinoderms, which stop at interphase, no such a factor has so far been found.
(4) In frogs and mammals, the oocytes are arrested at the second metaphase of meiosis whereas in echinoderms they are blocked later, at the pronucleus stage.
(5) An examination of Antp class homeo box genes in deuterostomes indicates that a chromosomal duplication has taken place in the evolutionary line leading to the vertebrates after the divergence of the echinoderms.
(6) Next, we present some features of the described processes for sugar and amino acid transport in the tubular portion of gastrointestinal tracts of three major invertebrate groups: echinoderms, molluscs, and arthropods.
(7) The emonctory structures, functions and stereotype and their component parts are studied in protists, spongia, coelenterata and coelomata: lower worms, annelids, their hyponeurian descendents (arthropods, molluses) and epineurian descedents echinoderms and protochordates (Stomochordata, Tunicata, Cephalochordata).
(8) The transition from the single creatine kinase locus, characteristic of certain echinoderms, to the two creatine kinase loci which are orthologous to those present in all vertebrates, occurred early in the chordate line.
(9) These features are characteristic of sea urchin (Echinoderm) spines which are composed of ornately formed calcite crystals covered by an epithelium.
(10) The echinoderms Asterias rubens and Solaster papposus (Class Asteroidea) metabolize injected [4(-14)C]cholest-5-en-3beta-ol to produce labelled 5alpha-cholestan-3beta-ol and 5alpha-cholest-7-en-3beta-ol.
(11) Echinoderm oocyte maturation is reviewed and a description of the ultrastructural, biochemical and molecular biological changes thought to occur during this process is presented.
(12) Another round of gene duplication, involving Wnt-3, -5, -7, and -10, occurred after the echinoderm lineage arose, on the ancestral lineage of jawed vertebrates.
(13) Changes in the distribution and organizational state of actin in the cortex of echinoderm eggs are believed to be important events following fertilization.
(14) Small numbers are present in algae, ferns, conifers, sponges, echinoderms, other marine animals, and arthropods.
(15) However, recent work which used colchicine to block microtubule assembly in the eggs of two other echinoderms, S. purpuratus and D. excentricus, has raised serious questions about the generality of this role for spindle microtubules.
(16) It would seem that these epitope regions have been strongly conserved since the epitope region is also present in the phosphoprotein of echinoderm teeth.
(17) Both species differences and species similarities in the agglutination were found in spermatozoa of the echinoderm, the sea urchin and the starfish.
(18) Furthermore, during meiotic maturation in these echinoderm and amphibian oocytes, this is followed by activation of many of the same protein-serine (threonine) kinases that are stimulated when quiescent mammalian somatic cells are prompted with mitogens to traverse from G0 to G1 phase.
(19) One of these fragments contains the active site and is identical at all sequenced residues with the corresponding region from the echinoderm sperm flagellar creatine kinase, and is 96% homologous with both chicken and rat B creatine kinase subunits.
(20) A significant feature of the early development of fertilized echinoderm and amphibian eggs and germinating seed embryos is the utilization of genetic information that has been previously transcribed during oogenesis and seed ripening.
Octopus
Definition:
(n.) A genus of eight-armed cephalopods, including numerous species, some of them of large size. See Devilfish,
Example Sentences:
(1) The chromophore of octopus rhodopsin is 11-cis retinal, linked via a protonated Schiff base to the protein backbone.
(2) To order your main course (from £7.50), squeeze through the tightly packed tables to the kitchen and select whatever catches your eye from an array of dishes that includes roast lamb, salmon with seafood risotto, stuffed cabbage, and sublime stuffed squid (£14), which comes with tomato rice studded with succulent octopus.
(3) Lens crystallins were isolated from cephalopods, octopus and squid.
(4) Thus, these alternatives are acceptable as the octopuses end their exponential growth phase at an age of 3 - 5 months.
(5) Treatment of cells with 2,4-D (2.5 mM) or 2,4,5-T (1.25 mM) for 20 h resulted in severe MT aggregation and the appearance of large bundles, which were organized in a rope-like structure in the former and a dramatic octopus-like pattern in the latter.
(6) Anatomical components of afferent innervation in the rim of the octopus sucker are described.
(7) I have reported the development of characteristic clinical and histologic lesions of granuloma annulare at the site of an octopus bite, with early signs following the bite by two weeks.
(8) The first thing she made me was an octopus, which I used in a picture of a fisherman.
(9) Experts say there are other arms of the federal octopus that could be squeezed in a bid to thwart Obama’s deferred action schemes, but even that would not affect the directive that tells immigration officials to focus on deporting “felons, not families”.
(10) Somata types of neurons in category III could not be identified morphologically, but somata were located in caudal parts of the posteroventral cochlear nucleus that correspond to the octopus cell area.
(11) The length of examination (which varies with the programs used as far as the Octopus is concerned, and with the patient's reaction time) is usually long with the Octopus and the Friedmann, but short with the Baylor.
(12) A temporary lowering of body temperature by means of cold drinks, tried on a group of 18 patients with acute optic neuritis, led in 14 cases to a significant improvement in the 30 degree visual field, which the authors tested with the Octopus 201 automatic perimeter.
(13) Peptides belonging to the tachykinin family have been isolated from molluscan (Octopus) salivary glands and from insect nervous tissue (Locusta migratoria).
(14) The C-terminal domain, Od-1, of the 7-domain subunit of Octopus dofleini hemocyanin has been prepared by partial trypsinolysis followed by ion-exchange chromatography.
(15) But it was sociable, too – Roberto organised a barbecue (with steaks from his cattle-farmer friend) and a fish supper (with octopus stew from his fisherman friend).
(16) Visual acuity, IOP, Visual field (Octopus program G1), Arterial pressure, Plasma viscosity have been recorded at 0, 12 and 24 weeks.
(17) One of the sharing plates at Polpo in London sees moscardini (aka baby octopus) cooked for 10 minutes in stock, left to cool and then marinated for 24 hours in a powerful mixture of olive oil, red-wine vinegar, fennel seeds, shallots, fresh oregano, garlic and finely sliced chilli.
(18) ID7720613 Restaurante da Praia, Praia da Arrifana, Algarve Stewed octopus with sweet potato is the speciality at this restaurant, which sits alone at the bottom of the steep access road that winds down to one of Portugal’s most beautiful and geologically interesting beaches.
(19) The authors prefer to follow up campimetric evolution of glaucomatous patients with the Octopus because it offers more sensibility and precision in quantifying losses.
(20) The visual field in 30 degrees was measured by an automated perimeter Octopus.