Li Qian, Somavat Pavel, Singh Vijay, Chatham Laura, Gonzalez de Mejia Elvira
Department of Food Science and Human Nutrition, University of Illinois at Urbana-Champaign, IL 61801, United States.
Department of Agricultural and Biological Engineering, University of Illinois at Urbana-Champaign, IL 61801, United States.
Food Chem. 2017 Sep 15;231:332-339. doi: 10.1016/j.foodchem.2017.03.146. Epub 2017 Mar 28.
The aim was to compare the distribution of ANCs in purple and blue corn coproducts from three conventional corn fractionation processes and linking ANC partitioning in different coproducts to corn kernel phenotype. Total monomeric anthocyanin (TA) from purple corn extract was 4933.1±43.4mg cyanidin-3-glucoside equivalent per kg dry corn, 10 times more than blue corn. In dry milled purple corn, maximum ANCs were present in the pericarp (45.9% of total ANCs) and in wet-milling they were concentrated in steeping water (79.1% of total ANCs). For blue corn, the highest TA was in small grits and gluten slurry in dry-milling and wet-milling coproducts, respectively. HPLC showed the highest concentration of each ANC in steeping water for purple corn coproducts. Micrographs of kernel showed pigments concentrated in pericarp layer of purple but only in aleurone of blue corn. ANCs can concentrate in certain coproducts depending upon physical distribution of pigments in kernel.
目的是比较三种传统玉米分馏工艺中紫色和蓝色玉米副产物中花色苷的分布情况,并将不同副产物中的花色苷分配与玉米粒表型联系起来。紫色玉米提取物中的总单体花青素(TA)为每千克干玉米4933.1±43.4毫克矢车菊素-3-葡萄糖苷当量,是蓝色玉米的10倍。在干磨紫色玉米中,最大量的花色苷存在于果皮中(占总花色苷的45.9%),而在湿磨过程中,它们集中在浸泡水中(占总花色苷的79.1%)。对于蓝色玉米,在干磨和湿磨副产物中,最高的TA分别存在于小粗粒和麸质浆中。高效液相色谱法显示,紫色玉米副产物浸泡水中每种花色苷的浓度最高。玉米粒的显微照片显示,色素集中在紫色玉米的果皮层,但仅集中在蓝色玉米的糊粉层中。花色苷可以根据其在玉米粒中的物理分布集中在某些副产物中。