|
|
|
|
| LEADER |
01000naa a22002652 4500 |
| 001 |
NLM16573048X |
| 003 |
DE-627 |
| 005 |
20231223105329.0 |
| 007 |
tu |
| 008 |
231223s2006 xx ||||| 00| ||eng c |
| 028 |
5 |
2 |
|a pubmed24n0553.xml
|
| 035 |
|
|
|a (DE-627)NLM16573048X
|
| 035 |
|
|
|a (NLM)17014149
|
| 040 |
|
|
|a DE-627
|b ger
|c DE-627
|e rakwb
|
| 041 |
|
|
|a eng
|
| 100 |
1 |
|
|a Bu, Huaitian
|e verfasserin
|4 aut
|
| 245 |
1 |
0 |
|a Characterization of thermally sensitive interactions in aqueous mixtures of hydrophobically modified hydroxyethylcellulose and cyclodextrins
|
| 264 |
|
1 |
|c 2006
|
| 336 |
|
|
|a Text
|b txt
|2 rdacontent
|
| 337 |
|
|
|a ohne Hilfsmittel zu benutzen
|b n
|2 rdamedia
|
| 338 |
|
|
|a Band
|b nc
|2 rdacarrier
|
| 500 |
|
|
|a Date Completed 06.09.2007
|
| 500 |
|
|
|a Date Revised 03.10.2006
|
| 500 |
|
|
|a published: Print
|
| 500 |
|
|
|a Citation Status PubMed-not-MEDLINE
|
| 520 |
|
|
|a Effects of beta-cyclodextrin (beta-CD) or hydroxypropyl-beta-cyclodextrin (HP-beta-CD) addition and temperature on thermodynamic, rheological, and structural features of semidilute solutions of hydroxyethylcellulose (HEC) and its hydrophobically modified analogue (HM-HEC) are reported. Differential scanning calorimetric (DSC) measurements revealed a thermally induced crystal melting transition of beta-CD at high concentrations in solutions of HEC and HM-HEC. No transition with HP-beta-CD was observed in aqueous solution. Viscosity results indicated that at a cosolute concentration of 2 mm, the beta-CD units are threaded onto hydrophobic tails of HM-HEC (C16 groups) to form columnar structures. This arrangement is more effective in the encapsulation of the hydrophobic chains than the monomer hydrophobic deactivation accomplished by the HP-beta-CD units. At cosolute concentrations above 8 mm, no further decoupling of the hydrophobic interactions occurs for any of the cosolutes. Small-angle neutron scattering (SANS) experiments on HM-HEC/beta-CD mixtures suggest that the large-scale association structures in HM-HEC/D(2)O solutions are reduced upon addition of beta-CD, and an interesting temperature effect is observed at 2 mm beta-CD addition. At high beta-CD concentrations and low temperatures, the formation of large beta-CD clusters or crystallites generates cross-links in the HEC and HM-HEC networks, resulting in a viscosity enhancement of several orders of magnitude. This strong temperature effect is not reflected in the structural features probed by SANS
|
| 650 |
|
4 |
|a Journal Article
|
| 700 |
1 |
|
|a Naess, Stine N
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Beheshti, Neda
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Zhu, Kaizheng
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Knudsen, Kenneth D
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Kjøniksen, Anna-Lena
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Elgsaeter, Arnljot
|e verfasserin
|4 aut
|
| 700 |
1 |
|
|a Nyström, Bo
|e verfasserin
|4 aut
|
| 773 |
0 |
8 |
|i Enthalten in
|t Langmuir : the ACS journal of surfaces and colloids
|d 1992
|g 22(2006), 21 vom: 10. Okt., Seite 9023-9
|w (DE-627)NLM098181009
|x 1520-5827
|7 nnns
|
| 773 |
1 |
8 |
|g volume:22
|g year:2006
|g number:21
|g day:10
|g month:10
|g pages:9023-9
|
| 912 |
|
|
|a GBV_USEFLAG_A
|
| 912 |
|
|
|a SYSFLAG_A
|
| 912 |
|
|
|a GBV_NLM
|
| 912 |
|
|
|a GBV_ILN_22
|
| 912 |
|
|
|a GBV_ILN_350
|
| 912 |
|
|
|a GBV_ILN_721
|
| 951 |
|
|
|a AR
|
| 952 |
|
|
|d 22
|j 2006
|e 21
|b 10
|c 10
|h 9023-9
|