Comparative Physical Tests on Segmented Polyurethanes for Cardiovascular Applications (Record no. 48027)
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| fixed length control field | 02071nam a2200229Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER | |
| control field | MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION | |
| control field | 20250625153930.0 |
| 040 ## - CATALOGING SOURCE | |
| Transcribing agency | CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) | |
| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) | B-13830 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION | |
| fixed length control field | 250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT | |
| Title | Comparative Physical Tests on Segmented Polyurethanes for Cardiovascular Applications |
| 490 0# - SERIES STATEMENT | |
| Volume/sequential designation | Clinical Materials, 8(1-2), p.57-64, 1991 |
| 520 3# - SUMMARY, ETC. | |
| Summary, etc. | In order to select a candidate segmented polyurethane (SPU)elastomer for cardiovascular prostheses, a series of physical tests was carried out on five commercially available biomedical polyurethanes. The tests were performed on uniformly thick sheets (0.2-0.3 mm), obtained by solvent casting from THF (Cardiothane 51, Pellethane 2363 80A, Estane 5714 Fl, and Estane 58810)or DMAC (Biomer). Tensile mechanical tests at 23 and 37 "C showed for all the copolymers typical stress/strain behaviour of elastomeric materials, with small individual differences. Hydrolytic stability was investigated at 85, 60, and 37 "C, at increasing times of exposure (966168 h), in water or alkaline buffer (pH = 10). As indicated by gel permeation chromatography, in almost all cases a degradation of the molecular weight (particularly the MY)was noticed after the hydrolytic tests, but tensile, thermal (by DSC)and dynamic mechanical properties were substantially not affected. SEM was also performed on the materials, before and after the hydrolytic tests. Changes in the morphology of the materials (related to degradation effects)was observed only in the case of Biomer, as shown also by the thermomechanical analyses. After this first series of physical tests, a clear choice of a particular SPU among the five investigated was not found. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Tanzi, M. C |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ambrosio, L. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Nicolais, L. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Iannace S. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Mambrito,B. |
| 700 12 - ADDED ENTRY--PERSONAL NAME | |
| Personal name | Ghislanzoni, L |
| 856 40 - ELECTRONIC LOCATION AND ACCESS | |
| Uniform Resource Identifier | <a href="https://drive.google.com/file/d/1s1JLu3cUgUQO_DzLfzPmJv9TB0j1ol34/view?usp=drivesdk">https://drive.google.com/file/d/1s1JLu3cUgUQO_DzLfzPmJv9TB0j1ol34/view?usp=drivesdk</a> |
| Public note | Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) | |
| Source of classification or shelving scheme | Clasificación local |
| Koha item type | Documentos solicitados |
| Lost status | Source of classification or shelving scheme | Damaged status | Not for loan | Collection | Home library | Current library | Shelving location | Date acquired | Total checkouts | Full call number | Date last seen | Price effective from | Koha item type |
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| Clasificación local | Ref1 | CICY | CICY | Documento préstamo interbibliotecario | 25.06.2025 | B-13830 | 25.06.2025 | 25.06.2025 | Documentos solicitados |