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Paul A. Seib

Bio: Paul A. Seib is an academic researcher from Kansas State University. The author has contributed to research in topics: Starch & Ascorbic acid. The author has an hindex of 49, co-authored 197 publications receiving 8111 citations. Previous affiliations of Paul A. Seib include University of Kansas & University of Colorado Boulder.


Papers
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Journal ArticleDOI
TL;DR: In this paper, the authors showed that the molecular structure of the microcrystalline region is the same in the four granular starches, and that T o is controlled indirectly by the surrounding amorphous regions.

361 citations

MonographDOI
01 Jun 1982

340 citations

Journal ArticleDOI
TL;DR: In this article, resistant starches (RS) were prepared by phosphorylation of wheat, waxy wheat, corn, wheat, high-amylose corn, oat, rice, tapioca, mung bean, banana, and potato starches in aqueous slurry (≈33% starch solids, w/w) with 1-19% (starch basis) of a 99:1 (w/w)-mixture of sodium trimetaphosphate and sodium tripolyphosphate (STMP) at pH 10.
Abstract: Resistant starches (RS) were prepared by phosphorylation of wheat, waxy wheat, corn, waxy corn, high-amylose corn, oat, rice, tapioca, mung bean, banana, and potato starches in aqueous slurry (≈33% starch solids, w/w) with 1–19% (starch basis) of a 99:1 (w/w) mixture of sodium trimetaphosphate (STMP) and sodium tripolyphosphate (STPP) at pH 10.5–12.3 and 25–70°C for 0.5–24 hr with sodium sulfate or sodium chloride at 0–20% (starch basis). The RS4 products contain ≤100% dietary fiber when assayed with the total dietary fiber method of the Association of Official Analytical Chemists (AOAC). In vitro digestion of four RS4 wheat starches showed they contained 13–22% slowly digestible starch (SDS) and 36–66% RS. However after gelatinization, RS levels fell by 7–25% of ungelatinized levels, while SDS levels remained nearly the same. The cross-linked RS4 starches were distinguished from native starches by elevated phosphorus levels, low swelling powers (≈3g/g) at 95°C, insolubilities (<1%) in 1M potassi...

294 citations

Journal ArticleDOI
TL;DR: In this article, a 55/45 (w/w) mixture of PLA and dried wheat starch was blended thermally in an intensive mixer with or without a low level of methylenediphenyl diisocyanate (MDI).
Abstract: Poly(lactic acid) (PLA) is a biodegradable polymer, but its applications are limited by its high cost. Blending granular starch with PLA reduces the cost, but the blend has poor strength properties. In this study, a 55/45 (w/w) mixture of PLA (weight-average molecular weight = 120,000 Da) and dried wheat starch was blended thermally in an intensive mixer with or without a low level of methylenediphenyl diisocyanate (MDI). Blends with MDI had enhanced mechanical properties that could be explained by the in situ formation of a block copolymer acting as a compatibilizer. Scanning electron micrographs showed reduced interfacial tension between the two phases. The presence of MDI also enhanced the mechanical properties of the blend at temperatures above the glass-transition temperature. Water uptakes by the PLA/starch blends with and without MDI did not differ. © 2001 John Wiley & Sons, Inc. J Appl Polym Sci 82: 1761–1767, 2001

263 citations


Cited by
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Journal ArticleDOI
TL;DR: The content of vitamin C in fruits and vegetables can be influenced by various factors such as genotypic differences, pre-harvest climatic conditions and cultural practices, maturity and harvesting methods, and postharvest handling procedures.

2,153 citations

Journal ArticleDOI
TL;DR: A review of polymer blends and composites from renewable resources can be found in this article, where the progress of blends from three kinds of polymers from renewable sources (i.e., natural polymers such as starch, protein and cellulose), synthetic polymers, such as polylactic acid and polyhydroxybutyrate, are described with an emphasis on potential applications.

1,931 citations

Journal ArticleDOI
TL;DR: The different technologies for producing fuel ethanol from sucrose-containing feedstocks (mainly sugar cane, starchy materials and lignocellulosic biomass) are described along with the major research trends for improving them.

1,792 citations

Journal ArticleDOI
TL;DR: In this article, the advantages, limitations, production methods, and applications of unmodified poly(lactic acid) or polylactide (PLA) are discussed, as well as various bulk and surface modification strategies used to date.

1,782 citations

Journal ArticleDOI
TL;DR: Future studies will focus on understanding the mechanisms underlying the microbiota-gut-brain axis and attempt to elucidate microbial-based intervention and therapeutic strategies for neuropsychiatric disorders.
Abstract: The importance of the gut-brain axis in maintaining homeostasis has long been appreciated. However, the past 15 yr have seen the emergence of the microbiota (the trillions of microorganisms within ...

1,775 citations