(n.) An under garment among the ancient Greeks, nearly representing the modern shirt.
(n.) One of a group of gastropod mollusks, with a shell composed of eight movable dorsal plates. See Polyplacophora.
Example Sentences:
(1) A comparison is made between the chiton myoglobins and other similar O2-binding proteins.
(2) Each of the three minerals forms a discrete microarchitectural unit of the chiton denticles.
(3) Contrary to the widely accepted view that chiton sperm lack acrosomes and that fertilization in this group occurs via a micropyle, we demonstrate here that fertilization in Tonicella lineata occurs by acrosome-mediated sperm-egg fusion.
(4) X-ray diffraction patterns show that the mature denticles of three extant chiton species are composed of the mineral lepidocrocite and an apatite mineral, probably francolite, in addition to magnetite.
(5) Although the rate constants associated with the reactions of individual dimer and monomer molecular species are very different, the two species of chiton investigated show remarkably similar properties when compared with each other.
(6) A possible circaseptennian rhythm is only suspected in the data from the ochre star (P = 0.14); it is rigorously described for the purple sea urchin (P less than 0.001) and also detected in the black chiton (P = 0.029) in time series covering 9.5 years, from September 1953 to April 1963 for the purple sea urchin and from January 1957 to September 1966 for the black chiton.
(7) The subunit structure and solution conformation of the hemocyanin of the chiton Acanthopleura granulata were investigated by light-scattering, ultracentrifugation, viscosity, absorbance, and circular dichroism methods.
(8) Cephalopod and chiton hemocyanins consist of single decameric particles, while gastropods have hemocyanins organized of di-decamers or higher assemblies.
(9) The subunit dissociation of the hemocyanins from five members of the Polyplacophora families, Acanthochitonidae, Callistoplacidae, Chitonidae, Ischnochitonidae and Mopalidae, represented by the chitons Cryptochiton stelleri, Nutallina fluxa, Acanthopleura granulata, Stenoplax conspicua and Mopalia mucosa, respectively, have been investigated by light-scattering molecular-weight and ultracentrifugation methods, using the hydrophobic reagents of the urea series and the Hofmeister salt series as probes of the contact areas of the hemocyanin subunits.
(10) Although hemocyanins have been reported in chitons, gastropods, and cephalopods, they have not been observed in the Class Bivalvia.
(11) Electron microscopy of the subradular organ of the chiton Lepidochitona cinereus (L) reveals at least three cell types, microvillous, ciliated and mucus-secreting, situated in a single epithelium.
(12) An increase and decrease in staining intensity subsequent to treatment with anti-LM4b and anti-LM2, respectively, was observed in digestive gland microsomes from BNF-treated chiton.
(13) Yoldia thraciaeformis and A. castrensis hemocyanins chromatograph on Sepharose 4B gel close to gastropod hemocyanin (Mr = 9 x 10(6] rather than chiton hemocyanin (Mr = 4 x 10(6].
(14) The shells of the chitons Lepidochitona cinereus, Sypharochiton pelliserpentis, Amaurochiton glaucus and Onithochiton neglectus were examined by scanning electron microscopy.
(15) The form of the path of attracted chiton sperm is like that observed during chemotaxis of the sperm of the hydroid Tubularia and the tunicate Ciona and resembles the behavior of Ciona sperm in that there is no increase in velocity as the cells move up the gradient.
(16) This is the first indication that lepidocrocite is precipitated by marine organisms and an apatite mineral by chitons.
(17) Observations of sperm behavior in the vicinity of gradients of egg-water or alcohol extracts of whole freshly-spawned eggs of several chitons reveal what appear to be directed movements of sperm up the gradient, resulting in the aggregation of motile sperm at the gradient source.
(18) Data series from the purple sea urchin (Strongylocentrotus purpuratus), a mollusk, the black chiton (Katharina tunicata), and the ochre sea star (Pisaster ochraceus), exhibiting circannual periods of 368, 361, and 365 days, have relatively tight 95% limits of 356-387, 356-367, and 359-371 days, respectively, when scrutinized by nonlinear least-squares rhythmometry.
(19) Newly metamorphosed chitons superficially resemble adult animals, but they lack the adult girdle ornaments, shell sculpture, and coloration.
(20) A method has been devised for isolating the calcium biomineral from the iron biominerals and organic components present in the major lateral teeth of the chiton Acanthopleura hirtosa.
Tunic
Definition:
(n.) An under-garment worn by the ancient Romans of both sexes. It was made with or without sleeves, reached to or below the knees, and was confined at the waist by a girdle.
(n.) Any similar garment worm by ancient or Oriental peoples; also, a common name for various styles of loose-fitting under-garments and over-garments worn in modern times by Europeans and others.
(n.) Same as Tunicle.
(n.) A membrane, or layer of tissue, especially when enveloping an organ or part, as the eye.
(n.) A natural covering; an integument; as, the tunic of a seed.
(n.) See Mantle, n., 3 (a).
Example Sentences:
(1) An essential predominance of the muscle tunic thickness and deterioration of blood supply has been stated in the arterial wall and in the distal parts of the lower extremities.
(2) Our examination focused on the organization of elastin and collagen which are the major components of this tunic.
(3) A tunic of crimson and dark blue velvet survived for centuries, hanging over the tomb of the Black Prince in Canterbury Cathedral.
(4) The intestinal tracts from seven different species of tunicates, some solitary, some colonial, were studied fine-structurally by freeze-fracture.
(5) Designs weren’t limited to abayas (a long tunic traditionally worn by Muslim women in the Middle East).
(6) The tunic of the ascidian Styela plicata is rich in a high molecular weight sulfated-L-galactan called the F-1 fraction.
(7) With this parameter, the tunicate hemocyte Thy-1 homology revealed significant relatedness to avian and mammalian Thy-1 molecules and was interestingly more related to mu chains of primitive vertebrates and to HLA class I and II encoded polypeptides than to Thy-1 molecules of higher vertebrates.
(8) The 1-H nuclear magnetic resonance spectrum of living tunicate blood cells was examined in an attempt to develop a biophysical assay for the native vanadium chromogen.
(9) Rodioimmunoassayable somatostatin (SRIF) was found in acid ethanol extracts from various parts of the gastro-entero-pancreatic (GEP) endocrine system in reptiles, amphibians, teleost bony fish, cartilaginous fish, and jawless fish, as well as in a deuterostomian invertebrate, the tunicate, Ciona intestinalis.
(10) Somebody had hung a guardsman's bright red ceremonial tunic on a road sign outside a pub.
(11) However, trauma to the vaginal tunic seemed to be crucial, causing damage to the differentiation of the seminiferous epithelium.
(12) So you can assure young Miss Paulus that it is very possible to be warm and fabulously fashionable at the same time, as this season is all about how to wear as many vests as possible under a loose tunic dress before you begin to take on the dimensions of the Michelin man.
(13) Leydig cells in the tunic and elsewhere in the testis show ultrastructural features commonly found in mammalian Leydig cells.
(14) Immunocytochemical and ultrastructural characterization revealed a predominant population of myofibroblasts, an as yet unrecognized observation in tumors arising from testicular tunics.
(15) Most of the cases occur in the testicular tunics, whereas a few originate from the epididymis.
(16) In so doing one can isolate compounds with novel structures or unsuspected activities from almost any phylum, including tunicates, sponges, insects, or even the much-studied terrestrial plants, as exemplified in several recent studies in our laboratory involving activities ranging from antiviral and antimicrobial activity to cytotoxicity and immunomodulation.
(17) As in mice, tunicate alpha- and alpha' -subunits each appeared to bear three N-linked oligosaccharides, one high mannose- and two complex-type glycans and focused as a number of heterogeneous spots on IEF gels.
(18) Antioxidant prenylated hydroquinones and non active chromene or chroman extracted from the marine colonial tunicate Aplidium californicum have been studied in order to throw some light on their biological activity.
(19) In the second sequence, the tunic over one of his shoulders was heavily bloodstained.
(20) This resulted in focal or multifocal loss of the muscular tunic in three ferrets.