MARC details
| 000 -LEADER |
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| fixed length control field |
02786nam a2200289Ia 4500 |
| 003 - CONTROL NUMBER IDENTIFIER |
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| control field |
MX-MdCICY |
| 005 - DATE AND TIME OF LATEST TRANSACTION |
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| control field |
20250625160146.0 |
| 040 ## - CATALOGING SOURCE |
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| Transcribing agency |
CICY |
| 090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN) |
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| Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) |
B-16151 |
| 008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION |
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| fixed length control field |
250602s9999 xx |||||s2 |||| ||und|d |
| 245 10 - TITLE STATEMENT |
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| Title |
Development of films based on blends of gelatin and poly(vinyl alcohol)cross linked with glutaraldehyde |
| 490 0# - SERIES STATEMENT |
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| Volume/sequential designation |
Food hydrocolloids, 25(7), p.1751-1757, 2011 |
| 520 3# - SUMMARY, ETC. |
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| Summary, etc. |
Both gelatin and poly(vinyl alcohol)(PVA)can be cross linked with glutaraldehyde (GLU). In the case of gelatin, the GLU reacts with each ?-NH2 functional group of adjacent lysine residues, while for PVA, the GLU reacts with two adjacent hydroxyl groups, forming acetal bridges. Thus it can be considered possible to cross link adjacent macromolecules of gelatin and PVA using GLU. In this context, the aims of this work were the development of biodegradable films based on blends of gelatin and poly(vinyl alcohol)cross linked with GLU, and the characterization of some of their main physical and functional properties. All the films were produced from film-forming solutions (FFS)containing 2 g macromolecules (PVA + gelatin)/100 g FFS, 25 g glycerol/100 g macromolecules, and 4 g GLU (25 percent solution)/100 g FFS. The FFS were prepared with two concentrations of PVA (20 or 50 g PVA/100 g macromolecules)and two reaction temperatures: 90 or 55 °C, applied for 30 min. The films were obtained after drying (30 °C/24 h)and conditioning at 25 °C and 58 percent of relative humidity for 7 days, and were then characterized. The results for the color parameters, mechanical properties, phase transitions and infrared spectra showed that some chemical modifications occurred, principally for the gelatin. However, in general, all the characteristics of the films were either typical of films based on blends of these macromolecules without cross linking, or slightly higher. A greater improvement in the properties of this material was probably not observed due to the crystallinity of the PVA, which has a melting point above 90 °C. The presence of microcrystals in the polymer chain probably reduced macromolecular mobility, hindering the reaction. Thus more research is necessary to produce biodegradable films with improved properties. |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
BIODEGRADABLE FILMS |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
BIOPOLYMER |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
PROTEIN |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
CHEMICAL MODIFICATION |
| 650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM |
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| Topical term or geographic name entry element |
PHYSICAL PROPERTIES |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Alves, P. M. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Carvalho, R. A. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Moraes, I. C. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Luciano, C. G. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Bittante, A. M. Q. |
| 700 12 - ADDED ENTRY--PERSONAL NAME |
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| Personal name |
Sobral, P. J. |
| 856 40 - ELECTRONIC LOCATION AND ACCESS |
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| Uniform Resource Identifier |
<a href="https://drive.google.com/file/d/1I_-ieHjFzdKsCrjOObxnhdvDOLHyBa_9/view?usp=drivesdk">https://drive.google.com/file/d/1I_-ieHjFzdKsCrjOObxnhdvDOLHyBa_9/view?usp=drivesdk</a> |
| Public note |
Para ver el documento ingresa a Google con tu cuenta: @cicy.edu.mx |
| 942 ## - ADDED ENTRY ELEMENTS (KOHA) |
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| Source of classification or shelving scheme |
Clasificación local |
| Koha item type |
Documentos solicitados |
