共查询到18条相似文献,搜索用时 97 毫秒
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挤压对脱胚玉米啤酒辅料中抗性淀粉的影响 总被引:1,自引:1,他引:0
为进一步提高脱胚玉米作啤酒辅料的浸出物收得率,通过实验室试验,采用二次正交旋转组合试验设计,研究挤压蒸煮系统诸参数(模孔孔径、套筒温度、物料含水率、螺杆转速和螺杆末端端面至模板内表面的距离)对用作啤酒辅料的挤压蒸煮后的脱胚玉米中抗性淀粉的影响。结果表明,经过挤压蒸煮的脱胚玉米中抗性淀粉的含量比脱胚玉米原料中的抗性淀粉降低约6.0%,比传统蒸煮工艺的糊化液降低约1.3%,提高了淀粉的利用率。 相似文献
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为了研究挤压大麦啤酒辅料中的抗性淀粉含量,试验研究了啤酒辅料的挤压蒸煮系统诸参数(模孔孔径、套筒温度、物料含水率、螺杆转速和螺杆末端端面至模板内表面的距离),采用五因素五水平1/2实施的二次正交旋转组合设计,建立数学模型研究表明,适当的挤压参数可以减少大麦辅料中抗性淀粉含量。 相似文献
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挤压大米啤酒辅料麦汁浸出物收得率研究 总被引:1,自引:1,他引:0
文章对以挤压膨化大米为辅料经糖化后制得的麦汁浸出物收得率进行研究,并且以麦汁的碘值、还原糖及滤渣中的淀粉含量为指标,考察其淀粉的降解程度,从而初步分析了挤压膨化大米做啤酒辅料比传统蒸煮大米做啤酒辅料其麦汁收得率高的原因。 相似文献
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玉米粗淀粉加酶挤压参数对抗性淀粉含量的影响 总被引:1,自引:0,他引:1
玉米粗淀粉是制作淀粉糖浆的主要原料之一,为探求玉米粗淀粉通过加酶挤压使玉米淀粉糖浆的DE和出品率增加、过滤速度加快、糖化时间缩短的原因,通过试验,用二次正交旋转组合试验设计安排试验,研究挤压蒸煮参数(套筒温度、物料含水率、螺杆转速、膨化中加酶量)对玉米粗淀粉中抗性淀粉含量的影响规律,得出通过挤压蒸煮技术可以使玉米粗淀粉中的抗性淀粉降低约4.5%,从而提高淀粉利用率。 相似文献
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挤压加酶大米作啤酒辅料的试验研究 总被引:1,自引:1,他引:0
通过二次旋转回归正交设计安排试验,研究了挤压加酶大米作啤酒辅料的挤压-糖化试验过程中各参数对醪液的主要考察指标的影响规律。结果表明,采用添加酶制剂挤压大米啤酒辅料和传统不挤压蒸煮大米辅料糖化工艺相比,麦汁浸出物收得率可提高,过滤速度和碘值也好于传统工艺,证实了挤压添加酶制剂膨化大米作啤酒辅料的可行性。 相似文献
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杨树明 《湖南农业大学学报(自然科学版)》2010,36(6):605-608
采用L4(23)正交试验法,以抗性淀粉含量高品系功米3号的精米为主要材料,研究其与不同基因型籼稻、粳稻和糯稻混配及蒸煮对抗性淀粉含量的影响.结果表明,(1)不同基因型稻米的抗性淀粉含量差异较大,其抗性淀粉含量受加工方式和蒸煮条件的影响,糙米高于精米,熟米饭高于生米;(2)稻米混配比例、蒸煮米水比和蒸煮次数显著影响混配米抗性淀粉含量,其影响主次因稻米基因型和加工类型而异,且其获得高抗性淀粉含量的参数优化条件不同,功米3号与精米混配,抗性淀粉含量优于糙米,混配籼稻、粳稻优于糯稻. 相似文献
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不同基因型水稻的抗性淀粉含量与稻米品质性状的相关性及差异性 总被引:1,自引:0,他引:1
对不同基因型水稻的米质和抗性淀粉含量进行相关性分析,同时根据各基因型水稻的米质进行了聚类和主成分分析。结果表明,粳稻米质优于籼稻;抗性淀粉含量与直链淀粉含量、垩白粒率有显著的相关性,籼稻中的抗性淀粉含量与品质性状有着更宽范围的相关性;聚类分析以欧式距离24.55为标准,将37份水稻材料分为6类,且具有明显的米质优劣划分;主成分因子对稻米品质的影响程度为:外观品质因子蒸煮品质因子碾磨品质因子,而抗性淀粉可归类到蒸煮品质因子中,对米质影响的贡献率达到19.48%。 相似文献
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挤压加酶脱胚玉米生产酒精的试验研究 总被引:1,自引:1,他引:0
为提高酒精生产的淀粉出酒率、缩短发酵时间、降低能源消耗,该研究采用五因素五水平、1/2实施的二次正交旋转组合设计,建立数学模型,得出淀粉出酒率较高的工艺参数的范围为:挤压加酶量0.9175~0.9500L·t-1,糖化加酶量0.9800~1.0175L·t-1,糖化时间58.05~60.30min,液化加酶量0.572~0.600L·t-1,酵母添加量为0.5075%~0.5195%。对照试验结果表明,挤压加酶蒸煮脱胚玉米生产酒精工艺经发酵48h后淀粉出酒率可达到59.19%,与传统酒精生产工艺的56.60%相比,出酒率可提高2.60%。 相似文献
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挤压膨化大米作啤酒辅料外加酶糖化工艺研究 总被引:10,自引:1,他引:9
研究以挤压膨化大米为辅料,啤酒糖化的外加酶糖化工艺参数对麦汁浸出物收得率的影响规律。寻求最佳的工艺参数,为以后的生产和科研提供依据。同时和传统工艺对比研究,其麦汁的主要技术指标良好,且麦汁收得率比传统工艺高4.22%。 相似文献
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SHENDe-chao 《东北农业大学学报(英文版)》2004,11(1):72-76
The properties of saccharified and boiled worts between extruded and traditional non-extruded beer adjuncts were studied at the laboratory and a small beer brewing equipment(100L) in this paper. Test results indicate that the main saccharification indices and filtration speeds of worts between extruded and traditional non-extruded beer adjuncts are similar basically. The collected rate of extracted material of worts of extruded beer adjuncts is 8% more than that of traditional non-extruded beer adjuncts. Fermentation time of worts of extruded beer adjuncts is 10% less than that of traditional non-extruded beer adjuncts. The energy consumption of extruded beer adjuncts in saccharification process is 13% less than that of traditional non-extruded beer adjuncts. 相似文献
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【目的】通过对1.2%EMS(甲基磺酸乙酯)处理的济麦20、济麦22诱变群体M3单株种子理化特性的分析,为小麦淀粉品质改良提供理论和材料基础。【方法】分别利用快速粘度仪(RVA)、近红外分析仪、耐高温α-淀粉酶法对淀粉糊化特性、总淀粉、直链淀粉和抗性淀粉含量进行测定分析。【结果】济麦20、济麦22诱变材料糊化粘变异度系数分别在12.25%~25.48%和30.92%~40.61%之间;济麦22诱变材料直链淀粉平均含量低于未诱变材料,而济麦20的相差不大;济麦22诱变材料抗性淀粉平均含量明显高于济麦20。【结论】两个小麦品种诱变材料糊化粘度变异程度、变化趋势均不同,可形成不同品质、不同功能的淀粉材料。 相似文献
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The effects of maltodextrin/starch in soy protein isolate–wheat gluten on the thermal stability of high-moisture extrudates 下载免费PDF全文
《农业科学学报》2023,22(5):1590-1602
This study aimed to investigate the interaction between maltodextrin/starch of different molecular weight distributions and soy protein isolate (SPI)–wheat gluten (WG) matrix during high-moisture extrusion. Two maltodextrins (dextrose equivalent (DE): 10 and 20) and wheat starch were extruded with SPI–WG blend in a system of 65, 70, and 75% moisture to investigate their effects on texture and thermal stability. Incorporating 5% maltodextrin (DE10) in the SPI–WG matrix improved the fiber structure and thermal stability. When wheat starch was thoroughly gelatinized during subsequent sterilization, the fiber structure and thermal stability were also improved. It was found that the plasticization caused by small-molecular weight saccharides and enhanced phase separation caused by large-molecular weight saccharides changed the melting temperature of blends and significantly improved the texture and thermal stability of extrudates. 相似文献
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旨在通过比较不同的小麦胚乳Wx蛋白亚基缺失类型材料籽粒的Wx蛋白总量支直链淀粉含量及总淀粉含量,明确胚乳Wx蛋白对支直链淀粉合成的作用。利用SDS-PAGE方法鉴定了13个品种Wx蛋白亚基组成,并测定了这些品种的Wx蛋白总量、直、支链淀粉含量及直/支比。结果表明,任何Wx基因缺失都会造成Wx蛋白合成数量的明显著减少,随着Wx基因不表达的数量增多,Wx蛋白合成的减少量增多;糯麦的直链淀粉含量最少。Wx蛋白含量与直链淀粉含量和直/支链淀粉含量之间存在极显著和显著的正相关,r=0.860 0,r=0.810 8;Wx蛋白含量与支链淀粉含量之间呈中度相关,r=0.402 7,这说明Wx蛋白总含量对直链淀粉含量的大小起到决定性作用,而对支链淀粉和总淀粉含量只有一定影响;通过操纵Wx基因可以改变籽粒胚乳中的直链淀粉含量和淀粉的直/支比,进而达到改进淀粉理化特性和加工特性的作用。 相似文献
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Use of two-stage dough mixing process in improving water distribution of dough and qualities of bread made from wheat–potato flour 下载免费PDF全文
Jian YIN Li CHENG Yan HONG Zhao-feng LI Cai-ming LI Xiao-feng BAN Zheng-biao GU 《农业科学学报》2021,20(1):300-310
The two-stage dough mixing process was innovated to improve the qualities of bread made from potato flour (PF) and wheat flour at a ratio of 1:1 (w/w). The final dough was first prepared from wheat flour before being added with PF. The effects of the method on enhancing the dough qualities were verified, and the distribution of water in gluten-gelatinized starch matrix of the doughs was investigated. We observed that the bread qualities were improved, as reflected by the increase of specific volume from 2.26 to 2.96 mL g–1 and the decrease of crumb hardness from 417.93 to 255.57 g. The results from rheofermentometric measurements showed that the dough mixed using the developed mixing method had higher maximum dough height value, time of dough porosity appearance, and gas retention coefficient, as well as enhanced gluten matrix formation compared to that mixed by the traditional mixing method. The results from low-field nuclear magnetic resonance confirmed that the competitive water absorption between gluten and gelatinized starch could restrict the formation of gluten network in the dough mixed using the traditional mixing process. Using the novel mixing method, gluten could be sufficiently hydrated in stage 1, which could then weaken the competitive water absorption caused by gelatinized starch in stage 2; this could also be indicated by the greater mobility of proton in PF and better development of gluten network during mixing. 相似文献