PMID- 17291080
OWN - NLM
STAT- MEDLINE
DCOM- 20070329
LR  - 20181201
IS  - 1525-7797 (Print)
IS  - 1525-7797 (Linking)
VI  - 8
IP  - 2
DP  - 2007 Feb
TI  - Global structures of high methoxyl pectin from solution and in gels.
PG  - 573-8
AB  - Images of high methoxyl orange pectin deposited from solution and high methoxyl 
      sugar acid gels (HMSAG) were obtained by atomic force microscopy (AFM) in the 
      tapping mode. For the first time, images of pectin deposited from water revealed 
      that the transition from pectin networks to individual molecules or aggregates 
      thereof occurred at concentrations between 6.5 and 13.1 microg/mL. At 6.5 
      microg/mL, shapes included rods, segmented rods, kinked rods, rings, branched 
      molecules, and dense circular areas. At 13.1 microg/mL, all of these shapes were 
      integrated into networks. These same structures were discernible in pectin high 
      methoxyl sugar acid gels. Thus one might consider pectin networks in water at 
      concentrations in excess of 10 microg/mL to be separate fluid precursors of 
      networks in high methoxyl sugar acid gels. Examination of AFM images revealed 
      that gels with "uniform" distribution of strands and pores between strands had 
      higher gel strengths as measured by a penetrometer than gels in which strands 
      were nonuniformly distributed and were separated by large and small spaces.
FAU - Fishman, Marshall L
AU  - Fishman ML
AD  - Crop Conversion Science and Engineering Research Unit, Eastern Regional Research 
      Center, Agricultural Research Service, U.S. Department of Agriculture, Wyndmoor, 
      Pennsylvania 19038, USA. mfishman@errc.ars.usda.gov
FAU - Cooke, Peter H
AU  - Cooke PH
FAU - Chau, Hoa K
AU  - Chau HK
FAU - Coffin, David R
AU  - Coffin DR
FAU - Hotchkiss, Arland T Jr
AU  - Hotchkiss AT Jr
LA  - eng
PT  - Journal Article
PL  - United States
TA  - Biomacromolecules
JT  - Biomacromolecules
JID - 100892849
RN  - 0 (Gels)
RN  - 0 (Solutions)
RN  - 0 (Sugar Acids)
RN  - 059QF0KO0R (Water)
RN  - 89NA02M4RX (Pectins)
SB  - IM
MH  - Citrus sinensis
MH  - Gels
MH  - Mechanics
MH  - Microscopy, Atomic Force
MH  - Molecular Conformation
MH  - Pectins/*chemistry
MH  - Solutions
MH  - Sugar Acids
MH  - Water
EDAT- 2007/02/13 09:00
MHDA- 2007/03/30 09:00
CRDT- 2007/02/13 09:00
PHST- 2007/02/13 09:00 [pubmed]
PHST- 2007/03/30 09:00 [medline]
PHST- 2007/02/13 09:00 [entrez]
AID - 10.1021/bm0607729 [doi]
PST - ppublish
SO  - Biomacromolecules. 2007 Feb;8(2):573-8. doi: 10.1021/bm0607729.