(a.) In the form of, or bounded by, a circle; round.
(a.) repeating itself; ending in itself; reverting to the point of beginning; hence, illogical; inconclusive; as, circular reasoning.
(a.) Adhering to a fixed circle of legends; cyclic; hence, mean; inferior. See Cyclic poets, under Cyclic.
(a.) Addressed to a circle, or to a number of persons having a common interest; circulated, or intended for circulation; as, a circular letter.
(a.) Perfect; complete.
(a.) A circular letter, or paper, usually printed, copies of which are addressed or given to various persons; as, a business circular.
(a.) A sleeveless cloak, cut in circular form.
Example Sentences:
(1) By hybridization studies, three plasmids in two forms (open circular and supercoiled) were detected in the strain A24.
(2) When irradiated circular DNA, previously nicked by T4 endonuclease V, is briefly exposed to elevated temperature, the DAN becomes susceptible to the action of exonuclease V, and pyrimidine dimers are selectively released.
(3) Circular muscle strips from the opossum esophageal body obtained 3-5 cm above the esophagogastric junction were suspended in organ baths for measurement of isometric tension.
(4) Noradrenaline decreased the phasic contraction amplitude of the circular muscle and exerted a stimulant effect on the tone which suggested an existence of two alpha 1-adrenoceptor subtypes.
(5) After methylene blue, the gradient in resting potential across the circular layer was greatly reduced or abolished.
(6) Circular dichroism (CD) spectra indicating different local orientation of oxazolone, when coupled to L or D side chain-terminating amino acids, support this suggestion.
(7) The alpha-helical content of the free form of the lipoprotein was measured from the circular dichroism spectrum of the lipoprotein in 0.01% sodium dodecyl sulfate and found to be 87%.
(8) Parameters affecting assembly of these complexes were sequences in circular DNA templates, sizes and sequences of linear DNA templates, temperature and incubation time.
(9) The mechanisms underlying the biphasic response (BR) of the circular muscle of the guinea pig ileum (CMGPI) to bradykinin (BK) have been examined.
(10) The distribution and lateral mobility of VDCCs on CA1 hippocampal neurons have been determined with biologically active fluorescent and biotinylated derivatives of the selective probe omega-conotoxin in conjunction with circular dityndallism, digital fluorescence imaging, and photobleach recovery microscopy.
(11) The structure of the Z-helix antigen was confirmed by circular dichroism (CD) and U.V.
(12) Dustin Benton Dustin Benton, head of resource stewardship, Green Alliance Creating a circular economy will take action in three areas: the economy, policy and politics, and innovation.
(13) Anastomotic devascularization has been incriminated in the development of post-operative complications (fistula, stenosis) of circular stapling.
(14) If people approach it in the right way and we show that this is a development agenda – it’s competitiveness, it’s jobs – then why wouldn’t it be adopted.” Read more like this: How much do you know about the circular economy?
(15) When the method proposed by Trela (1975) is applied, thin layers of the petrous crest are chiselled out until the common crus of the superior and posterior semi-circular becomes apparent.
(16) A comparison of the conformation of Folch-Pi apoprotein in organic solvent and in aqueous solutions has been made by ESR, infrared and circular dichroism spectroscopy studies.
(17) In the group of malignant schizophrenia, irrespective of the stage of the disease and in the group of circular forms there was a definite drop in the activity of cytochromoxidase, succinatedehydrogenase and MAO, while as the activity of the ATP-ase and peroxidase was increased.
(18) Circular cuts which surgically isolated the medial basal hypothalamus (MBH) from the remainder of the brain did not prevent copulation 4 to 24 h later, but did block reflex ovulation.
(19) Monodispersed N- and C-protected linear homo-oligomethionines (n = 2- -7) are studied by measurements of circular dichroism in the vacuum ultraviolet region.
(20) The first stage is characterized by circular disturbances of conditioned activity, vegetative shifts of compensatory character and intensification of individual characteristics of behaviour.
Trephine
Definition:
(n.) An instrument for trepanning, being an improvement on the trepan. It is a circular or cylindrical saw, with a handle like that of a gimlet, and a little sharp perforator called the center pin.
(v. t.) To perforate with a trephine; to trepan.
Example Sentences:
(1) Specimens from the bone marrow taken were by trephine biopsy from the sternum, ala ossis ilii and spine.
(2) The routine study of bone marrow trephine biopsies involves fixation, decalcification, paraffin-embedment, sectioning and staining.
(3) This correction improved the S-phase cell estimate from aspirated marrows, and the corrected values were not significantly different from values from paired trephine samples.
(4) Forty-five percutaneous trephine lung biopsies using the Steel apparatus were performed on 38 patients.
(5) A retrospective study was performed to evaluate the effect of recipient-donor trephine disparity on refractive error and corneal curvature post-suture removal in keratoconus.
(6) This instrument, a modification of a corneal trephine, provides a neat, smooth groove of adjustable depth.
(7) Trephination dates from prehistoric neolithic times (10,000-7000 B.C.)
(8) Forty-six patients were examined in a prospective, randomized clinical study to compare the use of the same size trephine on both donor and recipient with the use of a 0.5-mm larger trephine on the donor in aphakic keratoplasty and in keratoplasty combined with lens extraction.
(9) All patients had a trephine biopsy of the bone marrow and entered this study without prior selection.
(10) Meticulous handling of the graft (using a Goeller trephine and Tenon's traction sutures), filleting Tenon's capsule and avoiding cautery of the graft bed may minimize graft necrosis and atrophy.
(11) With the use of a guide box of plexiglas screwed into a trephine of the calvarium, several thermocouples could be inserted at various depths into the brain at the same time.2.
(12) In the control contralateral trephines, one-third to one-half of the defect was incompletely repaired.
(13) In a series of 20 human autopsy and 40 pig cadaver eyes the histological and ultrastructural results of donor and recipient trephination and full-thickness corneal grafting using new mask systems were evaluated.
(14) The use of a small trephine for chalazion surgery or tarsal biopsy is described.
(15) In this laboratory study, we used five different corneal trephines on 60 fresh human donor eyes with controlled intraocular pressure to study the variation in the size and shape of the trephine openings.
(16) One horizontal hole from the peripheral vasculature to one of the artificial longitudinal injuries to both medial menisci of the knee in each dog was made with a needlelike trephine.
(17) Three types of Berger's early investigations are described: (1) String-galvanometer recordings obtained between 1924 and 1926, mainly from trephined patients with cerebral diseases, which usually showed brain waves slowed to 6--8 per second; (2) Direct recordings from the cortex and white matter proving the cortical origin of the EEG in 1930; (3) Typical unpublished EEG recordings of epileptics and of petit-mal attacks obtained in 1930 and 1931.
(18) No complications of infection, osteomyelitis, or major nail deformities occurred in any patients treated by nail trephination, regardless of SUH size or presence of fracture.
(19) Tumour infiltration was also suggested in four of 10 staging procedures with suspicious trephine specimens, but in none of three with relatively innocent histological and cytological features.
(20) Seventy-two adult Sprague-Dawley rats each received bilateral 8-mm trephine defects in the temporoparietal area; this defect size precludes spontaneous osseous healing during the lifetime of the animal.