(a.) Pertaining to, produced by, or exhibiting, certain changes which minerals or rocks may have undergone since their original deposition; -- especially applied to the recrystallization which sedimentary rocks have undergone through the influence of heat and pressure, after which they are called metamorphic rocks.
Example Sentences:
(1) Quantitative and morphological data were obtained on developing olfactory axons in the African clawed frog, Xenopus laevis, during late premetamorphosis (stages 48-54), prometamorphosis (stages 55-57), and halfway through metamorphic climax (stages 58-62).
(2) (1) Control tadpoles did not undergo metamorphic change at any of the temperatures tested.
(3) There was a clear asynchrony in innervation, with projections to some terminal zones appearing before projections to others; projections to all terminal zones were present by late metamorphic stages.
(4) The general nerve terminal morphology and pattern of accumulation of acetylcholine receptors at cutaneous pectoris neuromuscular junctions were similar to those of the adult throughout metamorphic climax except that they still contained more than one motor axon.
(5) In contrast, tadpoles allowed to survive up to 6 months showed no loss of motoneurons if they did not enter metamorphic climax.
(6) The association becomes looser at the metamorphic stage and, occasionally, small breaks in the basement membrane are seen.
(7) Large adult animals have statoconia larger than those in early post-metamorphic animals which have just started producing multiple stones.
(8) The possible significance of decline in serum T4 levels to the metamorphic event in lamprey is discussed.
(9) The characteristics of the nuclear T3 receptors present in red blood cells (RBCs) of Rana catesbeiana tadpoles undergoing metamorphic climax have been investigated with a T3 saturation technique.
(10) The inhibition of unusually high endogenous corticosteroid levels in metamorphic larvae with metyrapone restores suppressor function.
(11) The retinotectal connexions of double nasal (NN), double temporal (TT) and double ventral (VV) eyes in juvenile Xenopus were mapped after post-metamorphic removal of the rostral, caudal, medial or lateral tectal halves with the subsequent cutting of the optic nerve of the operated eye.
(12) However, unlike the crossed fibers of the pre-metamorphic dermis, there is no preferred orientation to the fibers in either layer of the post-metamorphic dermis.
(13) Using selected cDNAs, RNA dot blot analysis of liver mRNA from tadpoles at different stages of metamorphosis showed that the level of one thyroid hormone-enhanced mRNA increased during late prometamorphosis and metamorphic climax.
(14) This also permitted the authors to note the absence of any myelofibrosis or metamorphic neo-osteogenesis.
(15) Coal dust of the IV stage of metamorphism was found to have more marked fibrogenic properties.
(16) The post-hatching development can be divided into four phases: planktonic, metamorphic, juvenile, and adult.
(17) They manifested themselves in disorders of the mitotic regimen and intercellular interactions, in atypical proliferations and primary glandular metamorphism of regenerating cells.
(18) Thyroids were taken from subjects representing metamorphic stages I (premetamorphic larvae), II (onset of climax), and VII (completion of gill resorption), as well as from captivity control larvae.
(19) (2) When tadpoles were kept in thyroxine solutions at 5 degrees, there were no changes in developmental morphology, and tadpoles kept at 18 and 20 degrees showed significant metamorphic changes in 5 to 6 days, but there was a high mortality at the higher T4 concentrations.
(20) The result is that four factors metamorphic rock, zinc, copper, chromium are suspected factors.
Sedimentary
Definition:
(a.) Of or pertaining to sediment; formed by sediment; containing matter that has subsided.
Example Sentences:
(1) Muramic acid, a component of the muramyl peptide found only in the cell walls of bacteria and blue-green algae, furnishes a measure of detrital or sedimentary procaryotic biomass.
(2) Thus carbon dioxide was taken out of the atmosphere and dumped on the seafloor before being turned into sedimentary rock.
(3) In the Central Valley of California, arsenic is present in soil at naturally high concentrations, being derived from marine sedimentary parent material of the Coastal Range.
(4) Gas-liqid radiochromatography was used to determine the soluble metabolic end products from [U-14C]glucose and a U-14C-labeled amino acid mixture by representative sedimentary clostridial isolates and by natural sediment microbial communities.
(5) This provides a microbial mechanism for the oxidation of the complex assemblage of sedimentary organic matter in Fe(III)- or Mn(IV)-reducing environments.
(6) In the light of these epidemiological observations and experimental studies it may be concluded that, at present, endemic goitre in western Colombia is not due to nutritional iodine deficiency, but that water supplies are contaminated with sulfur-bearing organic compounds with thionamide-like antithyroid activity most probably deriving from sedimentary rocks rich in organic matter and that these compounds are the main factor underlying the endemia.
(7) The effect of Fusarium sporotrichiella v. sporotrichioides mycotoxin (sporofusarin) on the total and non-sedimentary supernatant activity of 13 marker-enzymes of subcellular particles (2 mitochondrial enzymes-cytochrome oxidase and malate dehydrogenase; 8 lysosomal enzymes -- acid phosphatase, acid RNAase, acid DNAase, arylsulphatases A and B, beta-N-acetylglucosaminidase, beta-glucuronidase, beta-galactosidase and beta-glucosidase; 2 microsomal enzymes -- glucose-6-phosphatase and acetylesterase; plasma membrane enzyme -- alkaline phosphatase) of the rat liver, kidney, spleen and bone-marrow was studied in in vivo experiments.
(8) Contributions to PCP loss were determined for rock surface (epilithic), macrophyte surface (epiphytic), sedimentary, and water column communities by measuring rates of PCP disappearance in stream water, containing ambient concentrations of PCP, in contact with representative compartmental samples.
(9) Two other hypotheses regarding the causes of the framentation have been raised: a substantial portion of the breakage in the Krapina collection is attributable to excavation damage; and the rest of the breakage is attributable to sedimentary pressure and to natural rock falls that occurred during the site's prehistory.
(10) A mean tap water 222Rn content of 38.3 Bq L-1 and 10.4 Bq L-1 was measured in 31 villages with a crystalline subsoil and 73 villages with a sedimentary subsoil, respectively.
(11) One significant family of sedimentary lipids of widespread occurrence are series of C28-C32 alkanediols and hydroxyketones.
(12) Immunoglobulin G from the serum of patients with myeloma and positively reacting in the sedimentary test for cancer (PPR-STC) was purified by DEAE-Spehadex A-50 and KM-cellulose chromotography and studied by the method of isoelectrofocusing; Application of 1% ampholine within the pH gradient 3.0-10.0 shows the difference between the isoelectric spectra of immunoglobulin G from the donor and from a patient with myeloma.
(13) The foci were found mainly on Tertiary or Quaternary-Tertiary volcanic rocks in the Eastern and Central zones, or on non-carbonate sedimentary rocks in the Western zone.
(14) A survey of 37 communities supplied by stream water and receiving iodised salt for the last 10-20 years indicates that the presence of sedimentary rocks in the watersheds of streams more closely correlates with goiter prevalence than 12 other possible causative variables.
(15) Similar information on the proteins from the geological matrix might provide useful fingerprints for reconstructing ancient environments and for assessing sedimentary rocks for fossil fuel exploration.
(16) It was calculated that the mean proportion of cadmium in the sedimentary dust was between 13 and 16 p.p.m.
(17) During the hydrolysis of chitin, there was transient accumulation of a non-sedimentary chitin fraction which was not detectable by high-performance liquid chromatography.
(18) The gamma-ray absorbed dose rates in air above igneous rocks generally vary with their silica contents, and with the exception of shale, sedimentary rocks have lower K:U and K:Th ratios than most igneous rocks.
(19) Bones from a stratified sedimentary deposit in the Puu Naio Cave site on Maui, Hawaiian Islands, reveal the late Holocene extinction of 19 species of birds.
(20) Clinical or pathological signs of swine dysentery were not produced, although the organism was readly established in the sedimentary tract.