{"id":{"repo_id":"greece","oai_identifier":"oai:10442/0558"},"canonical_url":"https://search.dev.ndltd.org/etd/greece/oai:10442/0558","repository":{"repo_id":"greece","name":"Greek National Archive of PhD Theses","base_url":"https://phdtheses.ekt.gr/eadd_oai/request"},"display":{"title":"ΜΕΛΕΤΗ ΤΩΝ ΜΕΤΑΠΤΩΣΕΩΝ ΤΩΝ ΜΑΚΡΟΜΟΡΙΑΚΩΝ ΑΛΥΣΙΔΩΝ ΣΤΗΝ ΠΕΡΙΟΧΗ ΤΩΝ ΣΥΝΘΗΚΩΝ Θ","abstract":"THE VISCOSIMETRIC STUDY OF DILUTE SOLUTIONS OF POLYSTYRENE POLYMETHYL METHACRYLATE AND POLYVINYL-2-PIRIDINE VERSUS TEMPERATURE SHOWED THAT THE MACROMOLECULARECHAINS UNDERGO AN ABRUPT LOWERING OF THEIR DIMENSIONS ABOVE THE Θ CONDITIONS. THIS TRANSITION IS ATTRIBUTED TO AN ABRUPT CHANGE OF THE FLEXIBILITY OF THE CHAIN AS IT IS DEMONSTRATED ON THE SHORT RANGE INTERACTIONS PARAMETER. THESE PHENOMENA HAVE BEEN VERIFIED BY THE TECHNIQUE OF GEL PERMEATION CHROMATOGRAPHY WHICH HAS BEEN USED FOR THE FIRST TIME. THIS METHOD REQUIRES VERY SMALL AMOUNT OF SAMPLE AND MAY PROVE USEFUL IN THE STUDY OF TRANSITIONS OF BIOPOLYMERS.","abstract_html":"THE VISCOSIMETRIC STUDY OF DILUTE SOLUTIONS OF POLYSTYRENE POLYMETHYL METHACRYLATE AND POLYVINYL-2-PIRIDINE VERSUS TEMPERATURE SHOWED THAT THE MACROMOLECULARECHAINS UNDERGO AN ABRUPT LOWERING OF THEIR DIMENSIONS ABOVE THE Θ CONDITIONS. THIS TRANSITION IS ATTRIBUTED TO AN ABRUPT CHANGE OF THE FLEXIBILITY OF THE CHAIN AS IT IS DEMONSTRATED ON THE SHORT RANGE INTERACTIONS PARAMETER. THESE PHENOMENA HAVE BEEN VERIFIED BY THE TECHNIQUE OF GEL PERMEATION CHROMATOGRAPHY WHICH HAS BEEN USED FOR THE FIRST TIME. THIS METHOD REQUIRES VERY SMALL AMOUNT OF SAMPLE AND MAY PROVE USEFUL IN THE STUDY OF TRANSITIONS OF BIOPOLYMERS.","abstract_has_math":false,"creators":["Τσιτσιλιάνης, Κωνσταντίνος"],"institution":"University of Patras","degree_name":null,"degree_level":null,"degree_discipline":null,"degree_department":null,"school":null,"contributors":[],"advisors":[],"committee_chairs":[],"committee_members":[],"year":1987,"date_issued":"1987","date_published":"1987","updated_at":"2026-07-24T02:25:21Z","subjects":["ΕΥΚΑΜΨΙΑ ΑΛΥΣΙΔΑΣ","ΙΞΩΔΕΣ ΑΡΑΙΩΝ ΔΙΑΛΥΜΑΤΩΝ ΠΟΛΥΜΕΡΩΝ","ΜΕΤΑΠΤΩΣΕΙΣ ΜΑΚΡΟΜΟΡΙΩΝ","ΠΟΛΥΒΙΝΥΛΟ-2-ΠΥΡΙΔΙΝΗ","Πολυμεθακρυλικός μεθυλεστέρας","Πολυστυρόλιο","ΣΥΝΘΗΚΕΣ Θ","ΧΡΩΜΑΤΟΓΡΑΦΙΑ ΔΙΑ ΜΕΣΟΥ ΠΥΚΤΩΜΑΤΟΣ","CHAIN FLEXIBILITY","Gel permeation chromatography","MACROMOLECULES TRANSITIONS","Polymethyl methacrylate","Polystyrene","POLYVINYL-2-DIRIDINE","VISCOSITY OF POLYMER DILUTE SOLUTIONS","Θ CONDITIONS","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Χημικού Μηχανικού","Engineering and Technology","Chemical Engineering"],"languages":["gre"],"rights":[],"rights_urls":[],"identifier_entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0558"],"render_values":[{"text":"10.12681/eadd/0558","href":"https://doi.org/10.12681/eadd/0558","code":true}]}]},"links":{"outbound_url":"http://hdl.handle.net/10442/hedi/0558","outbound_label":"Handle","outbound_source":"dc:identifier"},"metadata_groups":[{"id":"people","label":"People","entries":[{"key":"dc:creator","label":"Author","values":["Τσιτσιλιάνης, Κωνσταντίνος"]}]},{"id":"academic_context","label":"Academic Context","entries":[{"key":"dc:date","label":"Dc Date","values":["1987"]},{"key":"dc:publisher","label":"Institution","values":["University of Patras","Πανεπιστήμιο Πατρών"]},{"key":"dc:type","label":"Dc Type","values":["PhD Thesis"]}]},{"id":"subjects_keywords","label":"Subjects and Keywords","entries":[{"key":"dc:subject","label":"Dc Subject","values":["ΕΥΚΑΜΨΙΑ ΑΛΥΣΙΔΑΣ","ΙΞΩΔΕΣ ΑΡΑΙΩΝ ΔΙΑΛΥΜΑΤΩΝ ΠΟΛΥΜΕΡΩΝ","ΜΕΤΑΠΤΩΣΕΙΣ ΜΑΚΡΟΜΟΡΙΩΝ","ΠΟΛΥΒΙΝΥΛΟ-2-ΠΥΡΙΔΙΝΗ","Πολυμεθακρυλικός μεθυλεστέρας","Πολυστυρόλιο","ΣΥΝΘΗΚΕΣ Θ","ΧΡΩΜΑΤΟΓΡΑΦΙΑ ΔΙΑ ΜΕΣΟΥ ΠΥΚΤΩΜΑΤΟΣ","CHAIN FLEXIBILITY","Gel permeation chromatography","MACROMOLECULES TRANSITIONS","Polymethyl methacrylate","Polystyrene","POLYVINYL-2-DIRIDINE","VISCOSITY OF POLYMER DILUTE SOLUTIONS","Θ CONDITIONS","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Χημικού Μηχανικού","Engineering and Technology","Chemical Engineering"]}]},{"id":"language_rights","label":"Language and Rights","entries":[{"key":"dc:language","label":"Dc Language","values":["gre"]}]},{"id":"identifiers","label":"Identifiers","entries":[{"key":"dc:identifier","label":"Identifier","values":["10.12681/eadd/0558","http://hdl.handle.net/10442/hedi/0558"]}]},{"id":"additional","label":"Additional Metadata","entries":[{"key":"dc:description","label":"Description","values":["THE VISCOSIMETRIC STUDY OF DILUTE SOLUTIONS OF POLYSTYRENE POLYMETHYL METHACRYLATE AND POLYVINYL-2-PIRIDINE VERSUS TEMPERATURE SHOWED THAT THE MACROMOLECULARECHAINS UNDERGO AN ABRUPT LOWERING OF THEIR DIMENSIONS ABOVE THE Θ CONDITIONS. THIS TRANSITION IS ATTRIBUTED TO AN ABRUPT CHANGE OF THE FLEXIBILITY OF THE CHAIN AS IT IS DEMONSTRATED ON THE SHORT RANGE INTERACTIONS PARAMETER. THESE PHENOMENA HAVE BEEN VERIFIED BY THE TECHNIQUE OF GEL PERMEATION CHROMATOGRAPHY WHICH HAS BEEN USED FOR THE FIRST TIME. THIS METHOD REQUIRES VERY SMALL AMOUNT OF SAMPLE AND MAY PROVE USEFUL IN THE STUDY OF TRANSITIONS OF BIOPOLYMERS.","Η ΙΞΩΔΟΜΕΤΡΙΚΗ ΜΕΛΕΤΗ ΤΩΝ ΑΡΑΙΩΝ ΔΙΑΛΥΜΑΤΩΝ ΤΟΥ ΠΟΛΥΣΤΥΡΟΛΙΟΥ ΠΟΛΥΜΕΘΑΚΡΥΛΙΚΟΥ ΜΕΘΥΛΕΣΤΕΡΑ ΚΑΙ ΤΗΣ ΠΟΛΥΒΙΝΥΛΟ-2-ΠΥΡΙΔΙΝΗΣ ΣΥΝΑΡΤΗΣΕΙ ΤΗΣ ΘΕΡΜΟΚΡΑΣΙΑΣ ΕΔΕΙΞΑΝ ΟΤΙ Η ΜΑΚΡΟΜΟΡΙΑΚΗ ΑΛΥΣΙΔΑ ΥΦΙΣΤΑΤΑΙ ΜΙΑ ΑΠΟΤΟΜΗ ΜΕΙΩΣΗ ΤΩΝ ΔΙΑΣΤΑΣΕΩΝ ΤΗΣ ΛΙΓΟΜΕΤΑ ΤΙΣ ΣΥΝΘΗΚΕΣ Θ. Η ΜΕΤΑΠΤΩΣΗ ΑΥΤΗ ΟΦΕΙΛΕΤΑΙ ΣΕ ΜΙΑ ΑΠΟΤΟΜΗ ΜΕΤΑΒΟΛΗ ΤΗΣ ΕΥΚΑΜΨΙΑΣ ΤΗΣ ΑΛΥΣΙΔΑΣ ΟΠΩΣ ΕΚΔΗΛΩΝΕΤΑΙ ΣΤΗΝ ΠΑΡΑΜΕΤΡΟ ΑΛΛΗΛΕΠΙΔΡΑΣΕΩΣ ΚΟΝΤΙΝΗΣ ΑΠΟΣΤΑΣΕΩΣ. ΤΑ ΦΑΙΝΟΜΕΝΑ ΑΥΤΑ ΕΠΙΒΕΒΑΙΩΘΗΚΑΝ ΚΑΙ ΜΕ ΤΗΝ ΤΕΧΝΙΚΗ ΤΗΣ ΧΡΩΜΑΤΟΓΡΑΦΙΑΣ ΔΙΑ ΜΕΣΟΥ ΠΗΚΤΩΜΑΤΟΣ Η ΟΠΟΙΑ ΧΡΗΣΙΜΟΠΟΙΗΘΗΚΕ ΓΙΑ ΠΡΩΤΗ ΦΟΡΑ ΣΕ ΤΕΤΟΙΟΥ ΕΙΔΟΥΣ ΜΕΛΕΤΕΣ. Η ΜΕΘΟΔΟΣ ΑΥΤΗ ΕΠΕΙΔΗ ΑΠΑΙΤΕΙ ΕΛΑΧΙΣΤΕΣ ΠΟΣΟΤΗΤΕΣ ΔΕΙΓΜΑΤΟΣ ΜΠΟΡΕΙ Ν'ΑΠΟΔΕΙΧΘΕΙ ΠΟΛΥ ΧΡΗΣΙΜΗ ΣΤΗΝ ΜΕΛΕΤΗ ΤΩΝ ΜΕΤΑΠΤΩΣΕΩΝ ΤΩΝ ΒΙΟΛΟΓΙΚΩΝ ΠΟΛΥΜΕΡΩΝ."]},{"key":"dc:title","label":"Title","values":["ΜΕΛΕΤΗ ΤΩΝ ΜΕΤΑΠΤΩΣΕΩΝ ΤΩΝ ΜΑΚΡΟΜΟΡΙΑΚΩΝ ΑΛΥΣΙΔΩΝ ΣΤΗΝ ΠΕΡΙΟΧΗ ΤΩΝ ΣΥΝΘΗΚΩΝ Θ","STUDY OF TRANSITIONS OF THE MACROMOLECULAR CHAINS IN THE REGION OF THE Θ CONDITIONS"]}]}],"canonical_facts":{"dc:creator":["Τσιτσιλιάνης, Κωνσταντίνος"],"dc:date":["1987"],"dc:description":["THE VISCOSIMETRIC STUDY OF DILUTE SOLUTIONS OF POLYSTYRENE POLYMETHYL METHACRYLATE AND POLYVINYL-2-PIRIDINE VERSUS TEMPERATURE SHOWED THAT THE MACROMOLECULARECHAINS UNDERGO AN ABRUPT LOWERING OF THEIR DIMENSIONS ABOVE THE Θ CONDITIONS. THIS TRANSITION IS ATTRIBUTED TO AN ABRUPT CHANGE OF THE FLEXIBILITY OF THE CHAIN AS IT IS DEMONSTRATED ON THE SHORT RANGE INTERACTIONS PARAMETER. THESE PHENOMENA HAVE BEEN VERIFIED BY THE TECHNIQUE OF GEL PERMEATION CHROMATOGRAPHY WHICH HAS BEEN USED FOR THE FIRST TIME. THIS METHOD REQUIRES VERY SMALL AMOUNT OF SAMPLE AND MAY PROVE USEFUL IN THE STUDY OF TRANSITIONS OF BIOPOLYMERS.","Η ΙΞΩΔΟΜΕΤΡΙΚΗ ΜΕΛΕΤΗ ΤΩΝ ΑΡΑΙΩΝ ΔΙΑΛΥΜΑΤΩΝ ΤΟΥ ΠΟΛΥΣΤΥΡΟΛΙΟΥ ΠΟΛΥΜΕΘΑΚΡΥΛΙΚΟΥ ΜΕΘΥΛΕΣΤΕΡΑ ΚΑΙ ΤΗΣ ΠΟΛΥΒΙΝΥΛΟ-2-ΠΥΡΙΔΙΝΗΣ ΣΥΝΑΡΤΗΣΕΙ ΤΗΣ ΘΕΡΜΟΚΡΑΣΙΑΣ ΕΔΕΙΞΑΝ ΟΤΙ Η ΜΑΚΡΟΜΟΡΙΑΚΗ ΑΛΥΣΙΔΑ ΥΦΙΣΤΑΤΑΙ ΜΙΑ ΑΠΟΤΟΜΗ ΜΕΙΩΣΗ ΤΩΝ ΔΙΑΣΤΑΣΕΩΝ ΤΗΣ ΛΙΓΟΜΕΤΑ ΤΙΣ ΣΥΝΘΗΚΕΣ Θ. Η ΜΕΤΑΠΤΩΣΗ ΑΥΤΗ ΟΦΕΙΛΕΤΑΙ ΣΕ ΜΙΑ ΑΠΟΤΟΜΗ ΜΕΤΑΒΟΛΗ ΤΗΣ ΕΥΚΑΜΨΙΑΣ ΤΗΣ ΑΛΥΣΙΔΑΣ ΟΠΩΣ ΕΚΔΗΛΩΝΕΤΑΙ ΣΤΗΝ ΠΑΡΑΜΕΤΡΟ ΑΛΛΗΛΕΠΙΔΡΑΣΕΩΣ ΚΟΝΤΙΝΗΣ ΑΠΟΣΤΑΣΕΩΣ. ΤΑ ΦΑΙΝΟΜΕΝΑ ΑΥΤΑ ΕΠΙΒΕΒΑΙΩΘΗΚΑΝ ΚΑΙ ΜΕ ΤΗΝ ΤΕΧΝΙΚΗ ΤΗΣ ΧΡΩΜΑΤΟΓΡΑΦΙΑΣ ΔΙΑ ΜΕΣΟΥ ΠΗΚΤΩΜΑΤΟΣ Η ΟΠΟΙΑ ΧΡΗΣΙΜΟΠΟΙΗΘΗΚΕ ΓΙΑ ΠΡΩΤΗ ΦΟΡΑ ΣΕ ΤΕΤΟΙΟΥ ΕΙΔΟΥΣ ΜΕΛΕΤΕΣ. Η ΜΕΘΟΔΟΣ ΑΥΤΗ ΕΠΕΙΔΗ ΑΠΑΙΤΕΙ ΕΛΑΧΙΣΤΕΣ ΠΟΣΟΤΗΤΕΣ ΔΕΙΓΜΑΤΟΣ ΜΠΟΡΕΙ Ν'ΑΠΟΔΕΙΧΘΕΙ ΠΟΛΥ ΧΡΗΣΙΜΗ ΣΤΗΝ ΜΕΛΕΤΗ ΤΩΝ ΜΕΤΑΠΤΩΣΕΩΝ ΤΩΝ ΒΙΟΛΟΓΙΚΩΝ ΠΟΛΥΜΕΡΩΝ."],"dc:identifier":["10.12681/eadd/0558","http://hdl.handle.net/10442/hedi/0558"],"dc:language":["gre"],"dc:publisher":["University of Patras","Πανεπιστήμιο Πατρών"],"dc:subject":["ΕΥΚΑΜΨΙΑ ΑΛΥΣΙΔΑΣ","ΙΞΩΔΕΣ ΑΡΑΙΩΝ ΔΙΑΛΥΜΑΤΩΝ ΠΟΛΥΜΕΡΩΝ","ΜΕΤΑΠΤΩΣΕΙΣ ΜΑΚΡΟΜΟΡΙΩΝ","ΠΟΛΥΒΙΝΥΛΟ-2-ΠΥΡΙΔΙΝΗ","Πολυμεθακρυλικός μεθυλεστέρας","Πολυστυρόλιο","ΣΥΝΘΗΚΕΣ Θ","ΧΡΩΜΑΤΟΓΡΑΦΙΑ ΔΙΑ ΜΕΣΟΥ ΠΥΚΤΩΜΑΤΟΣ","CHAIN FLEXIBILITY","Gel permeation chromatography","MACROMOLECULES TRANSITIONS","Polymethyl methacrylate","Polystyrene","POLYVINYL-2-DIRIDINE","VISCOSITY OF POLYMER DILUTE SOLUTIONS","Θ CONDITIONS","Επιστήμες Μηχανικού και Τεχνολογία","Επιστήμη Χημικού Μηχανικού","Engineering and Technology","Chemical Engineering"],"dc:title":["ΜΕΛΕΤΗ ΤΩΝ ΜΕΤΑΠΤΩΣΕΩΝ ΤΩΝ ΜΑΚΡΟΜΟΡΙΑΚΩΝ ΑΛΥΣΙΔΩΝ ΣΤΗΝ ΠΕΡΙΟΧΗ ΤΩΝ ΣΥΝΘΗΚΩΝ Θ","STUDY OF TRANSITIONS OF THE MACROMOLECULAR CHAINS IN THE REGION OF THE Θ CONDITIONS"],"dc:type":["PhD Thesis"]},"updated_at":"2026-07-24T02:25:21Z"}