scholarly journals The relationship of fibroblast translocations to cell morphology and stress fibre density

1982 ◽  
Vol 53 (1) ◽  
pp. 21-36
Author(s):  
L. Lewis ◽  
J.M. Verna ◽  
D. Levinstone ◽  
S. Sher ◽  
L. Marek ◽  
...  

Translocation of human fibroblasts in culture was studied using techniques of time-lapse cinemicrography, indirect immunofluorescence, and computer analysis. An inverse relationship between the velocity of cells during the last hour of life and the density of stress fibers seen by immune staining was demonstrated. Translocating cells generally assumed one of two interconvertible morphologies: a triangular tailed shape or tailed fibroblast (TF), and a tailless form that resembled a half-moon, which we call a half-moon fibroblast (HMF). The tail of TFs formed only on regions of substrate that had been previously traversed by cells. The half-moon morphology developed either on previously used or on virgin substrate. Cells adopted the HMF rather than the TF morphology with a four-fold greater frequency. HMFs translocated slightly faster than TFs. The foregoing observation suggest that the fibroblast tail is not an organelle essential for translocation. Since our technique allowed us to distinguish between cells which were cycling and those which had left cycle, we compared their velocities and found them to be similar. Also the average velocities of cells of different population-doubling levels (10th, 30th, 40th) were approximately equal.

1992 ◽  
Vol 71 (11) ◽  
pp. 1816-1821 ◽  
Author(s):  
C.A. Bibb ◽  
A.G. Pullinger ◽  
F. Baldioceda

Undifferentiated mesenchymal (UM) cells, the progenitor cells of the cartilage layer, have been assigned a significant role in TMJ articular tissue maintenance. This was based on reports of UM cell reduction with increased soft-tissue thickness for the condyle and temporal component. However, the strength of this inverse relationship was not presented and remained unclear. The purpose of the present study was to assess the strength of the correlation between UM cell presence and soft-tissue thickness in young adult TMJs at autopsy. Sagittal histological sections from the central thirds of 50 joints were evaluated with respect to articular soft-tissue thickness, histological character, and UM cell presence in the condyle and temporal component. The superior sector ofthe condyle and the articular eminence showed the greatest variability in soft-tissue thickness and were the only areas to show localized UM cell absence. The eminence was the only location to show an inverse relationship between soft-tissue thickness and UM cell presence, and this was consistent in both an ANOVA (p = 0.0016) and a Spearman correlation analysis. However, the strength of this correlation was only moderate (rho = -0.52), and no such relationship was observed in any other location. This study suggests that the relationship between UM cell presence and soft-tissue thickness is more complex than previously hypothesized and that the contribution of UM cells to articular tissue maintenance has been overstated, while other biological processes were overlooked.


2021 ◽  
Vol 12 (1) ◽  
pp. 113-125
Author(s):  
D.A. Krasilo ◽  
T.A. Krassilo ◽  
A.N. Zalipaeva

Objectives. Studying the relationship of autonomy and attachment in relationships with parents with real self-determination in students. Background. The growing world globalization, intercultural contradictions, confrontation within society seriously complicate the path of self-determination of modern youth. At the same time, due to technical progress and digitalization of the communication and education environment, there are significant transformations in the interaction of people in almost all spheres, including in the family. Therefore, the question of studying the most important aspects in the relationship of young people with their parents for real self-determination is especially acute. Study design. The work studied the indicators of real self-determination, attachment to parents and autonomy among students. The presence of a relationship between these parameters was established by calculating the Spearman correlation coefficient. Participants. 60 college students aged 18 to 21. Measurements. Methodology “Scale of adult attachment for close relationships”; autonomy questionnaire (authors O.A. Karabanova and N.N. Poskrebysheva); questionnaire “ORS” (author D.A. Krasilo). Results. An inverse relationship of indicators of real self-determination of students with the level of intimacy and the level of anxiety (scales of attachment to parents) was established. A direct relationship was revealed between the indicators of real self-determination and the level of autonomy. Conclusions. Proximity and anxiety (components of attachment) have a significant inverse relationship with the level of real self-determination in students. There are no significant connections between reliability (a component of attachment) and real self-determination in the sample under study. Emotional autonomy, cognitive autonomy, behavioral autonomy, and value autonomy have significant positive correlations with the level of real self-determination in students.


2016 ◽  
Vol 8 (1) ◽  
pp. 1
Author(s):  
Puja Khatri ◽  
Pragya Gupta

The increasing popularity of workplace spirituality has been associated with a myriad of benefits it is purported to bring about in the organizations, however not many empirical evidences of its inverse relationship with organizational politics have been reported. A sample of 202 employees from IT and ITES sectors based out of Delhi NCR was studied to not only examine the relationship of workplace spirituality with perceptions of organizational politics in a negative context as is popularly viewed but also look at the concept of positive/constructive politics at play in the organization. Analysis indicates significant relationship with the negative POPS but no relationship found with respect to positive politics. The reasons for these findings, its consequences and implications as well as directions for future research have been discussed.


2011 ◽  
Vol 9 (2) ◽  
pp. 10 ◽  
Author(s):  
Jon A. Hooks

Hooks (1991) argues that the explanatory power of unanticipated inflation in stock return models appears to result from the relationship of unanticipated inflation with the earnings capitalization rate and not the impact inflation has on the level or growth rate of earnings. Here we extend this line of investigation by examining the relationship between unanticipated inflation and the earnings innovation extracted from a univariate earnings forecast. We show that unanticipated inflation has no significant relationship with innovations in conventional earnings. However, we find that unanticipated inflation has a significant positive relationship with the magnitude of the earnings innovation during the 1955-85 period when earnings are adjusted to account for the effects of inflation on firms assets and liabilities.


1981 ◽  
Vol 48 (1) ◽  
pp. 259-262 ◽  
Author(s):  
Theo E. Lemaire ◽  
James R. Clopton

Over a 6-wk. period, the relationship of hostility and depression was explored in 7 mildly depressed and 11 control subjects. Depressed subjects expressed significantly more inwardly directed, outwardly directed, and total hostility than control subjects. For both groups of subjects there was an inverse relationship between inwardly and outwardly directed hostility. Thus, among nondepressed and mildly depressed individuals, maintaining a balance between inwardly and outwardly directed hostility may help to prevent the development of severe depression.


1971 ◽  
Vol 119 (553) ◽  
pp. 667-670 ◽  
Author(s):  
J. P. R. Young ◽  
M. H. Lader ◽  
G. W. Fenton

In a recent series of investigations significant but conflicting relationships have been claimed between the two personality dimensions extraversion (E) and neuroticism (N) and certain spontaneous and induced features of the normal EEG. Savage (1964), using alpha abundance data from automatic frequency analysis, demonstrated a significant positive correlation between extraversion and high alpha amplitude. Extraversion has been similarly related to the amplitude of the averaged evoked potential waveform (Shagass and Schwartz, 1965). However, in an investigation by Broadhurst and Glass (1969) both alpha amplitude and prevalence bore an inverse relationship to E scores; extraversion was significantly associated with the rate of change of potential of the EEG, as was neuroticism with the alpha frequency. More recently, Winteret al. (1971) could find no direct relationship between extraversion and EEG amplitude, though there was a tendency for low amplitude activity to be associated with high neuroticism scores. The findings were interpreted as showing a significant interaction between the variables measured, the relationship of extraversion and amplitude varying according to the neuroticism score.


Author(s):  
Lara Elena Gomes ◽  
Ingrid Thaiane Soares Batista ◽  
Brunno Leonardo Cruz Ferreira de Jesus

Tethered swimming tests are applied to evaluate propulsive forces in crawl stroke and may also be used to evaluate force applied by the movement of lower (leg kicking) and upper limbs (arm stroke). Considering the large number of recreational swimmers, this tool may be useful for coaches to evaluate the technique and force production by swimmers. As little attention has been paid to the application of these tests with recreational swimmers, the aims of this study were to verify the repeatability of the tethered swimming test for arm stroke, leg kicking and crawl stroke and to verify the relationship between performance in a 50-m test and in the tethered test with recreational swimmers. In this case, repeatability was defined as the agreement between the results of two successive evaluations. Ten male swimmers performed two 30-s maximal intensity tethered swimming tests with leg kicking, arm stroke and crawl stroke and three 50-m crawl stroke tests. Repeatability was found for mean force of all tests and for impulse evaluated in crawl stroke. Inverse relationship of the time to complete 50 m with the maximum and mean forces and with the impulse in the crawl stroke and an inverse relationship between time to complete 50 m and the mean force in the leg kicking were observed. Therefore, results from full tethered swimming tests applied with recreational swimmers may help swimming coaches.


Author(s):  
R. L. Brearley ◽  
A. M. Paxton ◽  
T. A. Lister ◽  
L. Brown

1970 ◽  
Vol 30 (1) ◽  
pp. 27-35 ◽  
Author(s):  
John W. Reich ◽  
Carl A. Moody

Several variables which might be useful in explaining the relationship between frequency of exposure and attitudinal liking are investigated. Complexity of the stimuli and their familiarity were the major variables of interest. Also involved were the sex of Ss and the individual stimuli. Four sets of stimuli were presented 20 times to independent groups of Ss, with scale ratings taken on the 1st and 20th presentations. The results showed that familiarity and complexity interacted in a complex fashion for liking. For highly familiar stimuli, an inverse relationship between complexity and affect held ( p = .10), but for novel stimuli a significant direct relationship held. Implications of the data for the hypothesized relationship of affect and complexity were discussed.


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