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Full-Text Articles in Life Sciences

Structure And Function Of Starch From Advanced Generations Of New Corn Lines, Y. Ji, K. Wong, J. Hasjim, Linda M. Pollak, Susan A. Duvick, Jay-Lin Jane, Pamela J. White Nov 2003

Structure And Function Of Starch From Advanced Generations Of New Corn Lines, Y. Ji, K. Wong, J. Hasjim, Linda M. Pollak, Susan A. Duvick, Jay-Lin Jane, Pamela J. White

Food Science and Human Nutrition Publications

Objectives of this research were to evaluate functions and structures of starches from exotic × adapted inbred lines and exotic lines, to confirm that the functional traits continue into the next generation of inbreeding, and to establish relationships between the fine structure and functional properties of the starches. Several lines were characterized from the successive generations of exotic crosses and exotic inbreds containing kernels with unusual, and potentially useful, thermal properties as measured by differential scanning calorimetry (DSC, gelatinization onset temperature <60 °C or range of gelatinization temperature >14 °C). The frequency of these traits increased with succeeding generations, when selection of the plants was based on the ...


European Food-Safety Concerns: From Farm To Market, D. Burden, Lawrence A. Johnson Nov 2003

European Food-Safety Concerns: From Farm To Market, D. Burden, Lawrence A. Johnson

Food Science and Human Nutrition Publications

In May of this year, 14 students from Iowa State University (ISU) had the opportunity to visit England and Scotland to examine food-safety issues, with emphasis on increasing the exposure to and understanding of European food-safety concerns, farming practices,the regulatory environment,research activities, and consumer attitudes.


Thermal And Structural Properties Of Unusual Starches From Developmental Corn Lines, Y. Ji, K. Seetharaman, K. Wong, Linda M. Pollak, Susan A. Duvick, Jay-Lin Jane, Pamela J. White Mar 2003

Thermal And Structural Properties Of Unusual Starches From Developmental Corn Lines, Y. Ji, K. Seetharaman, K. Wong, Linda M. Pollak, Susan A. Duvick, Jay-Lin Jane, Pamela J. White

Food Science and Human Nutrition Publications

Starches from exotic corn lines were screened by using differential scanning calorimetry (DSC) to find thermal properties that were significantly different from those exhibited by starches from normal Corn Belt lines. Two independent gelatinization transitions, one corresponding to the melting of a peak at ∼66 °C and the other to a peak melting at ∼69 °C, were found in some starches. The melting characteristics were traced to two separate types of granules within the endosperm. Strong correlations were found between DSC properties and proportion of large granules with equivalent diameter ≥17 μm. Starches with a lower peak onset gelatinization temperature ...