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本文通过研究老面馒头制作过程中添加不同质量的碱来探索其对老面馒头食味品质的影响。结果表明,碱添加量对老面馒头感官评价指标比容、外观、色泽、弹性、咀嚼性、气味和总评分均具有极显著影响,对柔软性评分有显著影响,对其内部结构评分影响不显著;综合分析老面馒头感官评价各指标,当碱的添加量为老面质量的1%时馒头食味品质最好,评分最高,该研究可以为老面馒头的生产提供理论依据。 相似文献
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为研究传统主食馒头切片的热风干燥特性,为工业化生产馒头片提供理论依据,本研究对切片馒头的热风干燥动力学进行了测定,并进行了动力学模型的分析。结果表明,热风干燥的温度和馒头切片的厚度均对其干燥特性有显著影响;Verma模型为馒头切片的最优热风干燥模型,R2为0.999 6,χ2为6.67×10-5,RMSE为0.008 087,试验值和预测值能较好拟合,符合正态分布;Deff在10-9m2·s-1数量级范围内,Ea的范围在8.639 077~18.932 640kJ·mol-1;随着干燥时间的增加,馒头切片的硬度增强,弹性减弱;干燥温度的变化对馒头切片的质构影响很小,切片厚度起显著作用;色度变化随干燥时间的增加,馒头切片发生褐变,且该变化与温度和厚度有明显关联,温度越高,厚度越薄,则褐变越易。本文建立了切片馒头的最适动力学模型,可用来计算获得最佳感官特性的工艺参数,具有一定的应用性。 相似文献
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高糖面包酵母作为微生物发酵剂和疏松剂,主要用于面包、甜馒头等高糖发酵类食品的生产.目前,我国销售的高糖酵母生理特性差异很大,为了节约生产成本、提高面包产品质量,本实验通过测定4种市售高糖面包酵母的冷冻存活率、蔗糖酶活力、耐糖性以及高糖发酵力,来了解各品牌酵母的功能特性,筛选出各项指标均较为优秀的市售高糖面包酵母.实验表... 相似文献
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以马铃薯雪花全粉、鸡油菌多糖溶液、高筋面粉为主要原料制备马铃薯保健面包,优化了马铃薯保健面包的制备工艺条件,并以普通马铃薯面包为对照,分析了二者质构参数、保水性、膳食纤维和蛋白质含量的差异.结果表明,马铃薯保健面包的最佳工艺条件为鸡油菌多糖溶液添加量15%,发酵时间2.0 h,烘烤温度200℃,烘烤时间21 min;马... 相似文献
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目的:了解榆阳区食品中铝含量超标的状况,为加强食品化学污染物的监督和控制管理提供科学依据。方法:分析汇总2018—2020年榆林市榆阳区食品安全监督抽检结果,对铝残留量不合格项目等信息进行分析。按GB 5009.182—2017的方法检测,按GB 2762—2017、GB 2760—2014和《国家卫生计生委关于批准β-半乳糖苷酶为食品添加剂新品种等的公告》(2015年第1号)进行评价。结果:从3年总体抽检情况来看,铝残留量不合格问题主要集中在淀粉及淀粉制品(粉丝、粉条类、凉粉)、油炸面制品、其他粮食加工品(包子、馒头类)以及糕点。从不合格项目来看,主要是含铝食品添加剂的“两超”(超范围、超限量)。结论:榆阳区粉类制中的铝残留量较高,主要与传统工艺中使用含铝食品添加剂有关,当地监管部门需重视,加强高风险食品靶向性抽检。 相似文献
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小麦胚乳中的谷蛋白是由高分子质量谷蛋白亚基(HMW-GS)和低分子质量谷蛋白亚基(LMW-GS)通过二硫键而形成的大小不同的聚合体。近年来的研究表明,小麦胚乳谷蛋白大聚体(GMP)含量与小麦面团特性、面包体积等多项品质指标高度相关,而HMW-GS也是通过亚基类型和含量的变化影响形成聚合体的数量、大小和分布,间接影响小麦加工品质。因此,本文简要综述了编码HMW-GS的不同基因位点及位点上的亚基与面团品质及焙烤品质的关系。 相似文献
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P. C. Abbott W. E. Tyner M. J. Roth G. T. Rafsnider 《Journal of Agricultural Economics》1991,42(1):23-32
A representative farm policy impact model was developed using linear programming and primary survey data. The model was used to estimate farm-level effects of proposed national government policies aimed at increasing food security through greater bread wheat production. The four policy options analysed included the introduction of a bread wheat variety resistant to an insect pest, an increase in the official bread wheat support price, potentially unlimited availability of nitrogen fertiliser, and rationing of nitrogen fertiliser at 500 kg per farm. The various policies increased farm income between 2.45 and 18 percent, as farmers made trade-offs between the production of bread wheat and the more profitable durum wheat. Adjustments were made by farmers in the model to meet government-targeted levels of bread wheat production in order to support national food self-sufficiency at minimum cost. Simultaneously, the resources freed were used to produce more durum wheat. The results suggest a need to analyse interregional and international comparative advantages in wheat production prior to implementing proposed policies aimed at increasing bread wheat output. 相似文献
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Matthias Staudigel 《Agricultural Economics》2012,43(6):701-714
This article investigates the extent to which Russian households that differ in their members’ weight status adjust their food consumption differently when their economic resources change. Using household‐panel data from the Russia Longitudinal Monitoring Survey (RLMS) from 1995 to 2005, we estimate total expenditure elasticities of food expenditures, food quantities, and food quality for normal‐weight, overweight, and obese households, respectively. The expenditure elasticities of quality derived for obese households for meat, bread, fruits, and dairy were found to be 15–20% higher than those of normal households. Hence, a change in economic resources causes obese households to adjust the quality of purchased foods significantly more flexibly than normal‐weight households. Only few differences were found for quantity and expenditure reactions. Our results emphasize that policies aiming to reduce obesity should consider deviations in consumption behavior of normal and obese consumers in terms of quality. 相似文献