(n.) The free-swimming larva of sea urchins and ophiurans, having several long stiff processes inclosing calcareous rods.
Example Sentences:
(1) During subsequent development to the pluteus larva stage this network increases in overall morphological complexity and becomes regionally distinct.
(2) A fluoresceinated lineage tracer was injected into individual blastomeres of eight-cell sea urchin (Strongylocentrotus purpuratus) embryos, and the location of the progeny of each blastomere was determined in the fully developed pluteus.
(3) When sea urchin eggs were fertilized with 125IFC-labeled sperm, the radioactivity from the sperm was quantitatively transferred to the egg (at a ratio of one sperm equivalent per egg) and persisted in the embryo as it developed to the pluteus larval state (5 days at 12 degrees C).
(4) The association of these genes with ectoderm is based on their being specifically expressed, albeit at low levels, in the pluteus ectoderm, and their being suppressed when presumptive ectoderm is made to differentiate as endoderm in the case of the embryo treated with lithium.
(5) The sea urchin Heliocidaris tuberculata undergoes typical development, forming an echinoid pluteus larva, whereas H. erythrogramma undergoes direct development via a highly modified, nonfeeding larva.
(6) The lipid content of the organic fraction of the mineralized matrix recalls the spicules of Pluteus larva reported in an earlier study.
(7) Because the sea urchin embryo develops from an egg to a pluteus larva in the absence of growth, this stockpiling of SpS24 mRNA anticipates rather than accompanies the onset of growth, which does not begin until after feeding.
(8) Single strand tracer excess titrations of alpha- and beta-tubulin mRNA and RNA gel blot hybridizations indicate that tubulin mRNA remains at a constant 1.3 X 10(5) transcripts per embryo during cleavage stages, increases during ciliogenesis shortly before hatching (12 hr PF), declines until midgastrula (30-35 hr PF), and then gradually increases 3-fold to about 6 X 10(5) per pluteus larva (72 hr PF).
(9) Tissues that have the ultrastructural characteristics of nervous tissues are associated with ciliary and muscular elements of the pluteus larva of Strongylocentrotus purpuratus.
(10) Sizing on 1.5% agarose gel indicated that the length of the palindromic sequences at the early blastula stage was predominantly about 200 b. p., and at the pluteus stage 240 b. p. Sensitivity of the palindromic sequences to S1 nuclease digestion at the blastula and gastrula stages was different.
(11) However, when aphidicolin is added after the vegetal plate has thickened, development continues normally through pluteus formation, even though DNA synthesis is inhibited by greater than or equal to 90% and cell division has ceased.
(12) Paracentrotus lividus embryos were continuously labeled with P32 from hatching blastula to pluteus.
(13) The LvN 1.2-kb mRNA was first detectable by Northern blots at the mesenchyme blastula stage just prior to gastrulation and then accumulated approximately 15-fold from gastrulation to the pluteus stage.
(14) A few days before metamorphosis, the hyaline layer lining the vestibular invagination of the competent pluteus larva is replaced by a three-layered cuticle resembling that of the adult sea urchin.
(15) Using indirect immunofluorescence, we have localized a molecule which shares antigenic determinants with mammalian insulin in the unfertilized egg as well as in the gut of pluteus larva sea urchins.
(16) Taking advantage of the superior resolution of cellular CAT expression patterns using the antibody visualization method, we found for the first time that, in addition to the expression in aboral ectoderm, some cells in the ciliated band of the pluteus express CyIIIa .
(17) The message is first detectable by RNase protection assays around hatching blastula stage and accumulates through pluteus larva stage.
(18) CAT mRNA was detected by in situ hybridization in serial sections of pluteus stage embryos derived from the injected eggs.
(19) Fractionation of pluteus stage embryos demonstrates that the protein is localized primarily with cells that form the syncytium of primary mesenchyme that elaborates the larval endoskeleton; furthermore, immunofluorescence localizes the epitope to the periphery of the endoskeleton in situ.
(20) Chromatin fractions differing in their transcriptional activity were isolated by selective micrococcal nuclease digestion of nuclei from sea urchin embryos (Strongylocentrotus droebachiensis) at the gastrula and pluteus stage.
Screen
Definition:
(n.) Anything that separates or cuts off inconvenience, injury, or danger; that which shelters or conceals from view; a shield or protection; as, a fire screen.
(n.) A dwarf wall or partition carried up to a certain height for separation and protection, as in a church, to separate the aisle from the choir, or the like.
(n.) A surface, as that afforded by a curtain, sheet, wall, etc., upon which an image, as a picture, is thrown by a magic lantern, solar microscope, etc.
(n.) A long, coarse riddle or sieve, sometimes a revolving perforated cylinder, used to separate the coarser from the finer parts, as of coal, sand, gravel, and the like.
(v. t.) To provide with a shelter or means of concealment; to separate or cut off from inconvenience, injury, or danger; to shelter; to protect; to protect by hiding; to conceal; as, fruits screened from cold winds by a forest or hill.
(v. t.) To pass, as coal, gravel, ashes, etc., through a screen in order to separate the coarse from the fine, or the worthless from the valuable; to sift.
Example Sentences:
(1) An automated continuous flow sample cleanup system intended for rapid screening of foods for pesticide residues in fresh and processed vegetables has been developed.
(2) Simplicity, high capacity, low cost and label stability, combined with relatively high clinical sensitivity make the method suitable for cost effective screening of large numbers of samples.
(3) It is suggested that the results indicate the need for full haematological screening of all patients with recurrent aphthae.
(4) Plain radiographs should be the initial screening modality for a suspected foreign body.
(5) I hope this movement will continue and spread for it has within itself the power to stand up to fascism, be victorious in the face of extremism and say no to oppressive political powers everywhere.” Appearing via videolink from Tehran, and joined by London mayor Sadiq Khan and Palme d’Or winner Mike Leigh, Farhadi said: “We are all citizens of the world and I will endeavour to protect and spread this unity.” The London screening of The Salesman on Sunday evening wasintended to be a show of unity and strength against Trump’s travel ban, which attempted to block arrivals in the US from seven predominantly Muslim countries: Iran, Iraq, Libya, Sudan, Somalia, Syria and Yemen.
(6) The sensitivity of an indirect fluorescent antibody (IFA) test (screening test) for the detection of antibodies to cytomegalovirus (CMV) was examined by using 128 serum specimens and quaternary aminoethyl (QAE)-Sephadex A50 column chromatography to separate IgM from IgG class antibodies.
(7) A cDNA library prepared from human placenta has been screened for sequences coding for factor XIIIa, the enzymatically active subunit of the factor XIII complex that stabilizes blood clots through crosslinking of fibrin molecules.
(8) This study examines the costs of screening patients for alcohol problems.
(9) The screening of blood products for HTLV-1 is of minor importance.
(10) The high participation percentage also shows that the prerequisite of screening, namely, a positive attitude on the part of the population, was as well fulfilled in the present project.
(11) Eighty-four paraplegic patients whose injury level was T2 or below and who were at least one year from spinal cord injury were screened for upper extremity complaints.
(12) The results indicated that 48% of the sample either regularly checked their own skin or had it checked by another person (such as a spouse), and 17% had been screened by a general practitioner in the preceding 12 months.
(13) A newborn presenting with persistent umbilical stump bleeding should be screened for factor XIII deficiency when routine coagulation tests prove normal.
(14) From 1983 to 1986 more than 2000 non-penicillinase producing Neisseria gonorrhoeae from Amsterdam, The Hague and Rotterdam were auxotyped and screened for susceptibility to 10 antibiotics by MIC determination.
(15) Improvement of its particularly poor prognosis requires therefore early screening based on reliable biological markers.
(16) A study was conducted to determine the usefulness of self-screening of blood pressure in families as part of a school health care programme, and to study the relationship between BP and sodium excretion in school children.
(17) We have isolated a murine cDNA clone, pCAL-F559, for the calcium-binding protein calcyclin by differential screening of a cDNA library made from RNA isolated from hair follicles of 6-d-old mice.
(18) Short-forms of Wechsler intelligence tests have abounded in the literature and have been recommended for use as screening instruments in clinical and research settings.
(19) Noise exposure and demographic data applicable to the United States, and procedures for predicting noise-induced permanent threshold shift (NIPTS) and nosocusis, were used to account for some 8.7 dB of the 13.4 dB average difference between the hearing levels at high frequencies for otologically and noise screened versus unscreened male ears; (this average difference is for the average of the hearing levels at 3000, 4000, and 6000 Hz, average for the 10th, 50th, and 90th percentiles, and ages 20-65 years).
(20) It appears that there exist similarities between rats and mice and that these models may be used for screening tests of hypolipidemic drugs.