(1) TRP1 RI circle (now designated YARp1, yeast acentric ring plasmid 1) is a 1,453-base-pair artificial plasmid composed exclusively of Saccharomyces cerevisiae chromosomal DNA.
(2) A high correlation between cell killing and number of acentric fragments per cell was found.
(3) Frequencies of induced single- and isochromatid breaks, acentric fragments and interchanges were compared with data obtained from 140 kV X-rays.
(4) The median absolute phase difference for 1811 acentric reflections was 32 degrees.
(5) Acentric fragments were observed associated with about 10% of the bridges.
(6) The subsequent loss of acentric fragments at mitosis is postulated to prevent the continuity of the genome and to produce cell death by the induction of chromatin structural changes.
(7) Dicentric chromosomes were twice more frequent during the entire radiotherapy than acentric fragments and about 30 times more frequent than centric ring chromosomes.
(8) Reductions were also noted in frequency of acentric aberrations.
(9) As a second approach, the number of fluorescence events in the histogram background was corrected for non-chromosomal debris and evaluated interms of chromosome aberration frequency per cell, which was consistent with the yields of dicentric chromosomes and acentric fragments observed in microscopic investigations.
(10) After approximately 3 months in vitro, more than half the cells propagated from rats that developed hepatocellular carcinomas had bean-shaped, acentrically displaced nuclei with large juxtanuclear homogeneous appearing areas resembling the hyalin or Mallory bodies in the livers of chronic alcoholics.
(11) Unstable aberrations were mainly acentric fragments in both groups.
(12) The dose-response of acentric fragment frequency fits a linear model between 0 and 128 R. Thus another cell type is added to those previously demonstrated to have no threshold dose for the induction of chromosome or gene mutations.
(13) The phases of acentric and additional centric reflections were then chosen by adding them to the map with various possible phases and computing the total entropy of the resulting map.
(14) Apparent acentric fragments which replaced a C-group chromosome in cultured blood lymphocytes from a woman patient were shown by autoradiography, G-banding and C-banding to be complete X chromosomes in which the centromere had divided prematurely in relation to the centromeres of other chromosomes in the same metaphase.
(15) Dose-response characteristics and the results of fractionation experiments indicate that the yield of micronuclei reflects both classes of acentric fragments, i.e., those associated and independent of exchange type of aberrations.
(16) A formula, based on the Poisson distribution of radiation-induced chromosomal deletions, was derived to predict the frequency of transmission of acentric fragments between subsequent mitoses.
(17) Each of the markers of 2q+, Dq+, mar(A2, st), mar(C12, M), r(?F) and minute metacentric and acentric markers was observed in two or more patients.
(18) This would have produced a symmetrical isodicentric chromosomes, plus one or two acentric fragments.
(19) Chromosome aberrations such as gaps and breaks of one or both chromatids, acentric fragments, dicentrics, ring chromosomes and other abnormal chromosomes are observed in lymphocyte and fibroblast cultures as well as in direct bone marrow preparations from patients with systemic sclerosis.
(20) The distribution of acentric fragments among mitotic cells conformed to Poisson expectation, while the distribution of micronuclei among daughter cells was significantly overdispersed.
Centric
Definition:
(a.) Alt. of Centrical
Example Sentences:
(1) Undeterred, Levin launched TMZ.com modestly in December 2005 as "a Hollywood and entertainment-centric news site".
(2) No clinically useful prediction may be made from cephalometric radiographs concerning the amount of mandibular deflection from centric relation to maximum intercuspation of teeth.
(3) Some of the patients of the latter group used guide flange prostheses during the postoperative period to return the mandible to the centric position.
(4) When recording and transferring centric relation onto an articulator errors can be minimized by proper use of dental materials.
(5) Returning the mandible back toward the original occlusion or habit centric has also been suggested by several reports.
(6) James Barlow forecast the "inevitable decline in the hospital-centric model".
(7) Myo-Monitor centric position is always anterior to centric occlusion, with an average of 1.8 mm.
(8) The objects of the nursing were defined nurse-centrically and generally.
(9) The condylar position at centric occlusion has been considered important in diagnosis of the temporomandibular joint.
(10) Activity occurred in the masseter and medial pterygoid muscles during the following movements; closing the jaw slowly either without occlusal contact or with occlusal contact and against resistance; free lateral movement to contralateral side, either against resistance or with occlusal contact; protraction of the jaw either without occlusal contact or with occlusal contact; swallowing either saliva or water; incisor gum chewing with either the ipsilateral or contralateral molars; normal mastication; and during forceful centric occlusion.
(11) This increase in duration was found to be due partially to centric slides and partially to asynergistic movements of the mandible.
(12) In the triturating area the verticality of the interalveolar axis is necessary for the stability of the cusp-fossa relationship in centric occlusion and for the stability of the prothesis during mastication.
(13) The effect of the extraction procedure on the centric movement area and the anteroposterior centric movement speed lasted for 10 minutes after extraction.
(14) At the p less than .05 level of significance, the anterior occlusal stop produced a centric relation position more posterior than that found with bimanual manipulation.
(15) Although the rate of chromosome evolution varies considerably in Petrogale, the genus clearly exhibits karyotypic orthoselection, with all the autosomal rearrangements identified being either centric fusions or centromeric transpositions.
(16) The subjects were asked to perform three definite tasks for the masseter muscle (intercuspid occlusion, maximum protrusion, and centric relation with a bite opening of 3mm) and two for the pterygoid muscle (maximum opening and maximum protrusion).
(17) The purpose of this study was to determine the effect of TMJ dysfunction on the recording of centric relation.
(18) The axis was located with a computerized axiograph, and the centric relation records were compared in vivo at the axis location.
(19) Anterior and posterior teeth provide primary and secondary lateral guidance in function, directing the jaw into centric occlusion.
(20) This allows centric relation to be recorded by whatever method use.