U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 close



Research
                Research Home
                            National Programs
                            Research Projects
                            Scientific Manuscripts
                            International Engagement
                            Scientific Software/Models
                            Databases and Datasets
                            Office of Scientific Quality Review
            Media
                News & Features
                            Multimedia
                            Briefing Room
                            Down on the Farm
                            Press Room
                            Science in Your Shopping Cart
                            Scientific Discoveries
                            Tellus
                            Under the Microscope
            About ARS
                About ARS Home
                            Staff Directory
                            Labs and Research Centers (Map)
                            Headquarter Offices
                            Organizational Chart
                            Employee Services (REE Employees Only)
                            Office of Outreach, Diversity, and Equal Opportunity
            Work With Us
                Work With Us Home
                            ARS Vacancies at USAJOBS
                            Careers at ARS Information
                            Scientific Collaborations
                            Extramural Agreements
                            1890 Faculty Research Sabbatical ProgramSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Fishman, Marshallitem
                                            Chau, Hoa

                                                         - *Rose*item
                                            Cooke, Peteritem
                                            Hotchkiss, Arland
  Submitted to: Journal of Agriculture and Food Chemistry
                                    Publication Type: Peer Reviewed Journal
                                    Publication Acceptance Date: 12/13/2007
                                    Publication  Date: 1/10/2008
                                    Citation: Fishman, M., Chau, H.K., Cooke, P.H., Hotchkiss, A.T. 2008. Global structure of microwave-assisted flash extracted sugar beet pectin. 2008. Journal of Agriculture and Food Chemistry 56(4):1471-1478.Interpretive Summary: The need to increase utilization of low valued co-products derived from the processing of  sugar beets has prompted us to investigate the structure of sugar beet pectin in and from solution.  Pectin is a polysaccharide found in sugar beet pulp, the remains from the extraction of sugar from sugar beets.  In this work we developed a method of extracting pectin from pulp by heating it for 3 minutes at 60 'C rather than an hour or longer at 80 'C as done conventionally.  Physical characterization revealed that we had extracted a higher quality pectin as indicated by its solution viscosity and molar mass than had been extracted heretofore from fresh sugar beet pulp.  This material has potential to  be a controlled release matrix for pharmaceuticals or as an emulsifier in foods or industrial products,  This research should be of help to sugar beet  growers and processors by increasing the demand and value of their by-products without increasing the cost of  sugar to the consumer.
                                Technical Abstract: We have studied the global structure of microwave assisted, flash extracted pectins isolated from fresh sugar beet pulp.  The objective was to minimize the disassembly and possibly the degradation of pectin molecules during extraction.  We have characterized these pectins by HPSEC with light scattering, viscometric detection, and by atomic force microscopy (AFM).  Generally 15 micrometer size column packing gave higher intrinsic viscosity, molar mass and polydispersity than 8 micrometer packing.  Samples analyzed with 15 micrometer packing gave weight average molar masses that ranged from 532,000-1.2 million Daltons, radius of gyration from about 35-51 nm,  polydispersity from 1.78-2.58 , intrinsic viscosity from about 3.00-4.30 dL/g and  recovery ranged from 8.40-14.81% of dry weight.  Chromatography revealed that a bimodal distribution of high molar mass spherical particles and lower molar mass coils was obtained.  AFM images of pectin corroborated this conclusion and further revealed that these strands and spherical particles were integrated into networks.  We have demonstrated that MAE of sugar beet pulp under moderate pressure and at relatively low temperature could extract under acid conditions high molar mass, moderate viscosity pectin in minutes rather than hours as is required by conventional heating.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov