+ Site Statistics
+ Resolve Accession
+ Subscribe to Site Feeds
EurekaMag Most Shared ContentMost Shared
EurekaMag PDF Full Text ContentPDF Full Text
+ PDF Full Text
Request PDF Full TextRequest PDF Full Text
Submit PDF Full TextSubmit PDF Full Text
+ Follow Us
Follow on FacebookFollow on Facebook
Follow on TwitterFollow on Twitter
Follow on Google+Follow on Google+
Follow on LinkedInFollow on LinkedIn

+ Translate

Extensibility changes of calcified soft tissue strips from human aorta

, : Extensibility changes of calcified soft tissue strips from human aorta. Canadian Journal of Physiology & Pharmacology 65(9): 1878-1883

Some degree of calcification was noted in more than half of the 59 aortas of individuals aged from 15 to 88 we have examined at autopsy. The calcification, which is determined by x-raying the opened and flat aorta, is in patches. We have studied the influence of calcification on stress versus strain, breaking strength, and modulus of elasticity of strips of aorta to determine its importance in vascular disease. Strips of aortic wall 5 .times. 30 mm were cut with orientation parallel or perpendicular to the vessel axis. Elongation versus load was measured with an Instron tensile testing machine. The true stress and true strain were calculated for both calcified and uncalcified strips from the thoracic and abdominal regions in both orientations. From the stress-strain curve the following values were selected: strain, stress, and slope at 80 mmHg equivalent pressure (1 mmHg = 133.3 Pa); maximum stress, strain, and slope; and breaking stress, strain, and slope if the sample broke. There were statistically significant differences in 13 of the 36 categories between calcified and uncalcified strips. The breaking strength and strain is lower in the calcified strips. The stress-strain curve for the uncalcified strip was mathematically transformed by reducing the amount of elongation so that the curve coincided with that of the calcified strip for eight matched pairs from the same individuals. The calcification appears to immobilize part of the strip, probably causing the boundary of the calcified tissue to be a region of high stress where tissue breakdown can occur.

Order PDF Full Text


Click here to order any other PDF Full Text

Accession: 005432768

PMID: 3690406

DOI: 10.1139/y87-291

Download PDF Full Text: Extensibility changes of calcified soft tissue strips from human aorta

Submit PDF Full Text

No spam - Every submission is manually reviewed

Due to poor quality, we do not accept files from Researchgate

Submitted PDF Full Texts will always be free for everyone
(We only charge for PDFs that we need to acquire)

Select a PDF file:

Other references

Martin D.F.; Reid G.A.Jr, 1974: Comparison of growth constants of 2 aquatic plants hydrilla and elodea. Environmental Letters 6(1): 47-54

Ingelse, K.; Messecar, D., 2016: Rural Women Veterans' Use and Perception of Mental Health Services. While the total number of veterans in the U.S. is decreasing overall, the number of women veterans is significantly increasing. There are numerous barriers which keep women veterans from accessing mental health care. One barrier which can impact r...

Anonymous, 2012: Source and evolution of the clinopyroxenes in the Loire and Seine basins France based on grain morphology and color. Variation in the characteristics (color, morphology) of clinopyroxene grains (CPX) in alluvial deposits and other surficial formations in the Loire valley, the G tinais and the Beauce show that many are pristine and come directly from recent volca...

Kelly, A., M.; Green, C., C., 2006: Binding affinities of hepatic nuclear estrogen receptors for genistein in channel catfish. Soybean meal, the major protein source used in commercial feeds for channel catfish Ictalurus punctatus, contains natural phytoestrogens known as isoflavones, many of which have been found to be endocrine disruptors. This study investigated whethe...

Al-Zahrani, M.S.; Kayal, R.A.; Bissada, N.F., 2006: Periodontitis and cardiovascular disease: a review of shared risk factors and new findings supporting a causality hypothesis. Periodontitis is a common chronic disease worldwide. It is a major cause of tooth loss among adults and recently has been suggested to increase the risk for developing several systemic diseases, including cardiovascular disease. Populations are no...

Mishra, J.N.; Chakravarti, B.P., 1955: The so-called 'dakhina' disease of Paddy in Bihar. As the result of an obscure disease of rice known as 'dakhina' whole fields become suddenly withered, leaves and stalks turn brown and brittle, and if ears have formed they contain no grain. Yellowing tips of the infected leaves turn red...

MEERLOO, J.A., 1954: Television addiction and reactive apathy. Journal of Nervous and Mental Disease 120(3-4): 290-291

Vorob'eva I.P.; Khmel I.A.; Bogdanova S.L.; Gavrilov V.Yu, 1973: Replication of the dna of the colicinogenic factor e 1 in the cycle of cell division of escherichia coli. Doklady Biochemistry 211(1-6): (1974)

Maurice, M.; Emiliani, S.; Dalet-Beluche, I.; Derancourt, J.; Lange, R., 1991: Isolation and characterization of a cytochrome P450 of the IIA subfamily from human liver microsomes. Antibodies raised against cytochrome P450, which is overexpressed in mouse hepatic tumors, (P450tu) crossreact with two human liver microsomal proteins (49 kDa and 52 kDa). We have quantified these proteins in 60 human liver samples and found grea...

Giles, J., 1994: Cardiology update. Conquest at Hastings. Nursing Standard 1987) 8(22): 52-52