(n.) The act or process of laying in strata, or the state of being laid in the form of strata, or layers.
(n.) The deposition of material in successive layers in the growth of a cell wall, thus giving rise to a stratified appearance.
Example Sentences:
(1) An important stratification factor, however, was related to tobacco usage.
(2) As retinal stratification continued, more cells were observed to have elaborated membrane systems for GABA uptake with varying degrees of affinity.
(3) Since T-antigen expression is correlated directly with impairment of stratification and differentiation, it is interesting that treatment of SVK14 with a single growth factor.
(4) We discuss advantages and disadvantages of total randomization, of Zelen-type randomization procedures, of Efron-type procedures vs more classical blocking procedures to control the balance between groups, and of Simon-Pocock-type procedures vs more classical stratification for controlling possible biases in prognostic factors.
(5) Heavy birthweight was 50% more frequent among Natives than non-Natives (relative risk 1.47, 95% confidence limits 1.35 and 1.59), after stratification by week of gestation.
(6) After allowance for the fact that regression analyses suggested that the proportion of tremolite in dust was probably 2.5 times higher in Thetford Mines, Quebec, than in Charleston, the results from both matched pair and stratification analyses of tremolite fibre concentrations in lung were almost the same as for chrysotile.
(7) Two prognostic stratification schemes were developed on the 1973 population which identified low and high risk groups with meaningfully different four-month cardiac death rates.
(8) It can be concluded that (i) stratified inhomogeneity in distal alveolar space does not exhibit a limiting factor of oxygen uptake in lungs, (ii) a contribution of stratificational effects to sloping alveolar plateau is expected to be of minor importance.
(9) The co-stratification of the two kinds of DS ganglion cell is consistent with the sharing of some inputs in common, including some cone bipolar cell inputs.
(10) Because hemicysts originated by detachment of squamous cells from the basal layers but not from adjacent squamous cells, they were considered to indicate stratification in the cultures.
(11) The value of invasive electrophysiologic testing for risk stratification in the general postinfarction patient population remains unclear.
(12) Although there is general concern about the psychological effects of gender stratification, we know relatively little about the particular aspects of inequality that affect men and women's mental health.
(13) The study used a cohort of elderly people randomly divided into two groups after stratification for sex.
(14) The recognition that tumor grade is the dominant prognostic variable has resulted in the more common use of a grading system, and a more uniform reporting and stratification of end results.
(15) Stratification of patients by either high or low predominant histologic grade is recommended in future GBA treatment studies.
(16) Extra-cellular recordings from single cells in the dorsal lateral geniculate nucleus (dLGN) of the tammar wallaby, Macropus eugenii, were made to find out whether the stratification of the nucleus could be correlated with the receptive field properties of units.
(17) Based on dendritic stratification within the inner plexiform layer (Famiglietti and Kolb, '76), the somatostatin-immunoreactive large cells were found to include both on-center cells and off-center cells, but were predominantly of the off-center type.
(18) Finally, we found that the changes in integrin expression that occur on initiation of stratification in vivo could be reproduced in organ cultures of developing skin; such cultures therefore provided a useful experimental model for further studies of the role of integrins in epidermal stratification.
(19) Patients with T1 squamous cell carcinomas had, in fact, the best prognosis (26.5% recurred) among the subgroups obtained by stratification of T number and cell type together; loco-regional failure as exclusive modality of relapse had a 5-year rate of 19.7% and metastatic failure of 30.0%.
(20) In 70% of cases the osseous adhesion is formed at the level of disks which demineralized osseous sawdust was introduced to (adhesion was formed, mainly, as perifocal osseous stratifications).
Stratify
Definition:
(v. t.) To form or deposit in strata, or layers, as substances in the earth; to arrange in strata.
Example Sentences:
(1) Proliferating cells were abundant and scattered throughout the stratified epithelium before the appearance of villi.
(2) Cation concentrations were determined in a stratified subsample (n = 89) of the study group.
(3) It is a pluri-stratified squamous layer which has some epithelial features (desmosomes and tonofilaments), and lacks connective tissue fibers in the extracellular spaces.
(4) Urothelial cells form organoid stratified epithelium.
(5) Lactobacillus strains of numerous species isolated from several animal sources exhibited cellular hydrophobicities that differed from those expected on the basis of their abilities to colonize the keratinizing stratified squamous epithelium in the mouse stomach.
(6) The movement of the heart reduces stratified inhomogeneity.
(7) These studies have therefore identified a constitutive viral promoter which is active throughout stratified epithelium as well as a novel promoter which is induced upon epithelial cell differentiation.
(8) It was previously reported that rat keratinocytes grown at the air-liquid interface on collagen gels or on nylon membranes produce multilayered cultures of uniformly stratified cells, comparable to the epidermis in situ by morphological and biochemical criteria.
(9) A cross-sectional survey of an age-stratified random sample of 619 independently-living adults (307 males, 312 females) aged 60 years and over, living in Toronto was conducted.
(10) This study compares the ages of menarche with ages of first intercourse among adolescent females in 1971 and 1976, stratified by ethnic group and residence (urban versus rural).
(11) There was no significant difference when patients were stratified for diabetes (log rank = 2.213, p = no significance [NS]), operative indication (disabling claudication vs. limb salvage) (log rank = 0.0005, p = NS), or outflow (no profundaplasty vs. profundaplasty) (log rank = 2.011, p = NS).
(12) This difference persisted stratifying women with gallstones and those in the control group for age.
(13) An analysis of all patients, stratified for tumor size, revealed an impact of transfusions on increasing recurrence (P = .007) and decreasing survival (P = .016).
(14) The effect of varying degrees of hyperglycaemia on insulin secretion was studied in newly diagnosed non-insulin dependent diabetic patients, stratified according to the fasting plasma glucose values.
(15) To control for possible confounding variables, the authors repeated the analyses after stratifying by demographic and diagnostic variables that were distributed differently among men and women.
(16) It can be concluded that (i) stratified inhomogeneity in distal alveolar space does not exhibit a limiting factor of oxygen uptake in lungs, (ii) a contribution of stratificational effects to sloping alveolar plateau is expected to be of minor importance.
(17) Five acceptable forced expiratory maneuvers were obtained with a portable spirometer from each person in a population of 1,670 selected from a stratified random sample of a community.
(18) Stratified analyses showed that this increased risk for clinical disease among smokers was evident at all levels of occlusion, even among women with minimal stenotic disease.
(19) Barrett's esophagus is a condition in which the stratified squamous epithelium of the esophagus is replaced by metaplastic columnar epithelium that predisposes to the development of esophageal adenocarcinoma.