Приказ основних података о документу
Oblik i veličina makromolekula karboksimetil skroba u razblaženim rastvorima
The shape and size of macromolecules of carboxymethyl starch in diluted solutions
dc.creator | Stojanović, Željko | |
dc.creator | Jeremić, Katarina | |
dc.creator | Jovanović, Slobodan | |
dc.creator | Nierling, Wolfgang | |
dc.creator | Lechner, Manfred Dieter | |
dc.date.accessioned | 2023-01-23T12:17:37Z | |
dc.date.available | 2023-01-23T12:17:37Z | |
dc.date.issued | 2009 | |
dc.identifier.issn | 0350-249X | |
dc.identifier.uri | http://TechnoRep.tmf.bg.ac.rs/handle/123456789/5622 | |
dc.description.abstract | Uzorci karboksimetil skroba pripremljeni su reakcijom eterifikacije u heterogenom medijumu. Tri uzorka su pripremljena iz kukuruznog skroba a tri iz skroba iz krompira. Stepen supstitucije sintetisanih uzoraka je iznosio od 0,40 do 1,10. Uzorci su ispitivani metodama statičkog i dinamičkog rasipanja svetlosti i viskozimetrijom razblaženih rastvora u 0,10 M rastvoru NaCl kao rastvaraču na 25 °C. Određene su vrednosti molarnih masa, MW, poluprečnika rotacije, Rg, hidrodinamičkog poluprečnika, Rh, i graničnog viskozitetnog broja, [η]. Utvrđeno je da su uzorci bez obzira na tip skroba i stepen supstitucije međusobno slični. Fraktalne dimenzije, df, iznose 2,380 (Rg – MW) i 2,406 (Rη – MW), dok parametar ρ iznosi 1,195. Vrednost fraktalne dimenzije i parametra ρ karakteristične su vrednosti za ponašanje razgranatih klastera u termodinamički dobrim rastvaračima. | sr |
dc.description.abstract | Carboxymethyl starch samples were prepared by etherification in heterogeneous media. Three samples were prepared from corn starch and three samples from potato starch. Degree of substitution of prepared samples ranged from 0.40 to 1.10. The samples were investigated by static and dynamic light scattering and viscosity of diluted solution in 0.10 M NaCl as solvent at 25 °C. The values of molar mass, MW, radius of gyration, Rg, hydrodynamic radius, Rh, and limited viscosity number, [η] were determined. It was found that the samples are similar to each other regardless of the type of starch and the degree of substitution. Fractal dimension, d f, was equal to 2.380 (Rg - MW) and 2.406 (Rη - MW), while parameter ρ was 1.195. The values of fractal dimension and parameter ρ are characteristic values for the behavior of branched clusters in thermodynamically good solvents. | sr |
dc.language.iso | sr | sr |
dc.publisher | Association of Chemical Engineers of Serbia | sr |
dc.relation | info:eu-repo/grantAgreement/MESTD/MPN2006-2010/142023/RS// | sr |
dc.rights | openAccess | sr |
dc.rights.uri | https://creativecommons.org/licenses/by/4.0/ | |
dc.source | Hemijska industrija | sr |
dc.subject | Karboksimetil skrob | sr |
dc.subject | Razgranati klasteri | sr |
dc.subject | Statičko i dinamičko rasipanje svetlosti | sr |
dc.subject | Viskozimetrija | sr |
dc.title | Oblik i veličina makromolekula karboksimetil skroba u razblaženim rastvorima | sr |
dc.title | The shape and size of macromolecules of carboxymethyl starch in diluted solutions | sr |
dc.type | article | sr |
dc.rights.license | BY | sr |
dc.citation.epage | 602 | |
dc.citation.issue | 6 | |
dc.citation.spage | 593 | |
dc.citation.volume | 63 | |
dc.identifier.doi | 10.2298/HEMIND0906593S | |
dc.identifier.fulltext | http://TechnoRep.tmf.bg.ac.rs/bitstream/id/14755/bitstream_14755.pdf | |
dc.identifier.scopus | 2-s2.0-77952933406 | |
dc.identifier.wos | 000276140700001 | |
dc.type.version | publishedVersion | sr |