(n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity.
Example Sentences:
(1) Several suppressors (suhD) that can specifically suppress the temperature-sensitive opal rpoH11 mutation of Escherichia coli K-12 have been isolated and characterized.
(2) Oligonucleotide-directed mutagenesis was used to generate amber, ochre and opal suppressors from cloned Arabidopsis and Nicotiana tRNA(Tyr) genes.
(3) The presence of 5' homologies flanking only the transcribed genes and not the pseudogenes suggests that these regions may be regulatory control elements specifically involved in the expression of the eukaryotic opal suppressor gene.
(4) The nonsense mutants of S. pombe have been classified according to their suppressibility by defined opal and ochre suppressors into a class of efficiently suppressed opal and a class of inefficiency suppressed ochre mutants.
(5) The opal suppressor form shows moderate suppressor activity when the gene is introduced on this vector, however, the ochre suppressor form exhibits no detectable biological activity regardless of gene copy number.
(6) The rabbit genome encodes an opal suppressor tRNA gene.
(7) Using such an assay, we provide the first direct evidence that an opal suppressor tRNA gene is functional in mammalian cells.
(8) The growth patterns of nonsense mutants of RNA (GA and f2) and DNA (lambda and T4) phages suggested that KO1 carried an amber, but not ochre or opal suppressors.
(9) Opal suppressor tRNA did not accept any selenocysteine and phosphoseryl-tRNA did not change to selenocysteyl-tRNA.
(10) We report here the construction of a detailed genetic and physical map of these genes, the neighboring gene 4 and a portion of gene 10, in which 289 conditional lethal amber, opal, temperature sensitive and cold sensitive mutations are mapped into 44 small (several hundred base pair) intervals of known sequence.
(11) More than half a million people have joined the Open Air Laboratories (Opal) citizen science project, designed to get people outdoors and involved in scientific research, since its launch in 2007.
(12) We studied the above mechanisms using opal suppressor tRNA in mammals.
(13) Two mutations, Cys-318 to an opal termination codon and Cys-319 to Ser-319, were created in vitro and substituted in the chromosome in place of the normal RAS2 allele.
(14) The important role of G73 in tryptophan identity was confirmed using mutants of an opal suppressor derivative of tRNA(Trp).
(15) This study has been undertaken in order to elucidate the mechanisms of incorporation of Se into glutathione peroxidase (GSHPx), in which selenocysteine corresponds to the opal termination codon UGA on the mRNA.
(16) An opal suppressor of tRNA(Gln) (su+2UGA) containing C35 (anticodon UCA) was isolated by genetic selection and mutagenesis.
(17) A proposal of the role of animal opal suppressor phosphoseryl (Ps)-tRNA is that Ps-tRNA plays a role as an intermediate in the metabolic pathway from 3-phosphoglycerate to glycine.
(18) Suppressor [32P]phosphoseryl-tRNA, prepared using bovine seryl-tRNA synthetase and ATP:seryl-tRNA phosphotransferase, was mixed with rabbit reticulocyte lysates containing endogenous hemoglobin mRNA having the termination codon UGA (opal).
(19) OPAL concept (Old People With Active Life styles) recommends an individualized establishment of therapy instead of standard techniques to try the minimal trouble to a good quality of life for the patient.
(20) "It is so well understood, so embedded in the psyche, that people make jokes about Opal Fruits and Jammy Dodgers being one of your five a day.
Oval
Definition:
(a.) Of or pertaining to eggs; done in the egg, or inception; as, oval conceptions.
(a.) Having the figure of an egg; oblong and curvilinear, with one end broader than the other, or with both ends of about the same breadth; in popular usage, elliptical.
(a.) Broadly elliptical.
(n.) A body or figure in the shape of an egg, or popularly, of an ellipse.
Example Sentences:
(1) It happens to anyone and everyone and this has been an 11-year battle.” Emergency services were called to the oval about 6.30pm to treat Luke for head injuries, but were unable to revive him.
(2) At autopsy, this DOCA-hypertensive rat was found to have a form of hepatitis associated with proliferative activity, i.e., cellular unrest, mitotic figures and oval cell hyperplasia.
(3) Facebook Twitter Pinterest Ronald Reagan meeting with Rupert Murdoch in the Oval Office on 18 January 1983.
(4) A radical rearrangement of the organism occurred gradually: initially oval in shape, the parasite became round, then elongated, flattened, and underwent cytokinesis.
(5) Numerous slender sarcotubules, originating from the A-band side terminal cisternae, extend obliquely or longitudinally and form oval or irregular shaped networks of various sizes in front of the A-band, then become continuous with the tiny mesh (fenestrated collar) in front of the H-band.
(6) The nuclei in these typical onocytes appeared oval or spheroid.
(7) Afghanistan will be the main item on the agenda at a meeting on Wednesdaybetween Cameron and Barack Obama in the Oval Office on the main day of the visit.
(8) They are rounded or oval bodies visible to the naked eye, and situated ventrolaterally in the posterior mesonephros.
(9) Small oval cysts (less than or equal to 1 cm) with strong echo were all diagnosed colloid goiter.
(10) This model opened possibilities to study the filamentous form of P. ovale in vitro.
(11) Electron microscopically, the tumor cell nuclei were oval or polygonal and sometimes slightly invaginated, with a few prominent nucleoli.
(12) The proliferation zone is only a few cell rows thick and contains single cells with an oval shape and longitudinal fibrocyte-like nucleus.
(13) Furthermore, the long axis of the right and left atria was measured from the center of the apposed atrioventricular valve leaflets to the posterior atrial wall, and the sizes of the atrial chambers were defined using their widths at the prospective broadest points through the area of foramen ovale.
(14) The septum primum, as the valve of the foramen ovale, has been previously described as a mobile, echogenic line or dot in the left atrium.
(15) The authors described a fluoroscopic method of guiding percutaneous needle penetration of the foramen ovale.
(16) "I'm led to believe that Notts County used to play their home games at Trent Bridge, The Oval hosted an FA Cup final and Bramall Lane used to be a cricket ground, but are there any other cricket grounds that have hosted either league or international football matches?"
(17) The earliest perfect ring-shaped formation of the foramen ovale is observed in the 7th fetal month and the latest in 3 years after birth.
(18) Magnetic resonance revealed oval corresponding hypointense foci both on T1-and T2-weighted images.
(19) Arterial oxygen tension was lower in patients with a patent foramen ovale (mean 55 [SD 14] vs 62 [16] mm Hg, p = 0.038).
(20) Peripheral blood specimen showed abnormal lymphoid cells with an oval to cleaved nucleus, rather condensed chromatin, occasional prominent nucleolus, and basophilic cytoplasms with vacuoles which seems to be a T-cell counterpart of B-cell chronic lymphocytic leukemia with mixed cell types.