scholarly journals Fostering Students' Initial Understanding of Area Measurement through the Idea of Consistency and Inverse Relationship of Unit

Author(s):  
Febrian
Author(s):  
Kathleen B. Reuter

The reaction rate and efficiency of piperazine to 1,4-diazabicyclo-octane (DABCO) depends on the Si/Al ratio of the MFI topology catalysts. The Al was shown to be the active site, however, in the Si/Al range of 30-200 the reaction rate increases as the Si/Al ratio increases. The objective of this work was to determine the location and concentration of Al to explain this inverse relationship of Al content with reaction rate.Two silicalite catalysts in the form of 1/16 inch SiO2/Al2O3 bonded extrudates were examined: catalyst A with a Si/Al of 83; and catalyst B, the acid/phosphate Al extracted form of catalyst A, with a Si/Al of 175. Five extrudates from each catalyst were fractured in the transverse direction and particles were obtained from the fracture surfaces near the center of the extrudate diameter. Particles were also obtained from the outside surfaces of five extrudates.


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.


CHEST Journal ◽  
2012 ◽  
Vol 142 (5) ◽  
pp. 1222-1228 ◽  
Author(s):  
Luigi Taranto Montemurro ◽  
John S. Floras ◽  
Philip J. Millar ◽  
Takatoshi Kasai ◽  
Joseph M. Gabriel ◽  
...  

2012 ◽  
Vol 37 (2) ◽  
pp. 204-210 ◽  
Author(s):  
C Dellas ◽  
M Lankeit ◽  
C Reiner ◽  
K Schäfer ◽  
G Hasenfuß ◽  
...  

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.


1973 ◽  
Vol 24 (2) ◽  
pp. 279 ◽  
Author(s):  
CL Lohse ◽  
WJ Pryor ◽  
RM Butterfield

Twenty-eight Peppin Merino wethers were equally divided into two groups, a continuously grown group and a group which suffered a 6-week period of liveweight loss followed by recovery. Wethers in the continuously grown group were slaughtered over a range of liveweights; wethers in the restricted group were slaughtered over the same range of liveweights during the recovery phase. Each animal was totally dissected and individual muscles weighed. Several linear measurements and a cross-sectional area measurement were made of the longissimus muscle (M. longissimus thoracis et lumborum). Dry matter, ether extract, nitrogen, and energy measurements were determined for the total muscle tissue. The relationship of the high impetus and low impetus muscles to total muscle weight was determined. No significant effects of treatment were shown on any of the M. longissimus measurements nor on the chemical and energy values. The relationship of the weight of the low impetus muscles to that of total muscle was not significantly different between groups, but the same relationship for the high impetus muscles was highly significantly different. It is concluded that the weight relationship of high impetus muscles to total muscle is a sensitive test to differentiate between normal and recovering muscle. It cannot of course be applied in the live animal.


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