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甜酒酿发酵机理的初步研究 总被引:2,自引:0,他引:2
以糯米为原料制做甜酒酿,安琪甜酒曲的添加量为糯米重量的0.4%,发酵温度为30℃,发酵时间48h.研究表明甜酒酿制作过程中起糖化作用的糖化酶类主要是根霉菌在甜酒酿的发酵过程中产生的;甜酒酿的发酵过程是边糖化边发酵.发酵结束时甜酒酿的酸度(以乙酸计)为0.229g/(100g甜酒酿),乙醇含量为0.7%vol,pH值为3.75,甜酒酿中还原糖的含量为23.9%,较高的还原糖含量和较低的pH值有利于延长甜酒酿的保藏时间. 相似文献
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本试验以苦荞米、糯米、安琪甜酒曲为原料,采用传统糯米甜酒酿造工艺,通过响应面设计分析方法,研究发酵时间、加曲量、加水量、苦荞添加量4种因素,对苦荞糯米甜酒品质感观得分的影响.结果表明,在苦荞添加量27.48%、加曲量3.28g、加水量0.23kg、发酵时间58h的条件下能得到较好品质的苦荞糯米甜酒. 相似文献
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桂花甜酒酿酒曲的优选和工艺研究 总被引:2,自引:0,他引:2
通过以糯米、桂花为原料,研究几种不同的酒曲在桂花甜酒酿酿制过程中对品质及发酵工艺的影响,并采用正交试验法来确定发酵时间、发酵温度等工艺条件.以桂花甜酒酿成品中总糖、总酸、酒精度、氨基酸态氮等指标参数进行分析,认为采用蜂蜜牌苏州甜酒曲的发酵时间为60h、发酵温度为32℃可以得到风味独特、品质优良的桂花甜酒酿. 相似文献
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对彩色甜糯玉米甜酒酿罐装食品的发酵工艺和产品的内容物配比进行试验研究.以发酵温度为25℃、料液比为1:0.8进行发酵试验,考察不同甜酒曲用量、不同发酵时间的发酵效果.再以发酵后的甜酒醪进行调配试验,找出适宜的稀释比和加糖量.试验结果表明:在发酵温度为25℃、料液比为1:0.8的条件下,彩色甜糯玉米甜酒酿发酵时甜酒曲最佳用量为1.5%、发酵最佳时间为72h.彩色甜糯玉米甜酒酿罐装食品内容物最佳配比为:甜酒醪:水为1:2,加糖量9%.产品可溶性固形物为9.4%,酒精度≤1.50. 相似文献
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The objective of this study was to develop a process for the production of both high-fructose rice syrup and high-protein rice flour from broken rice. The rice flour was obtained from broken rice by using either a dry or wet milling method. The glucose produced from the slurry of various raw materials by treating with α-amylase and glucoamylase was compared. Results indicated that cassava and corn starch were better raw materials than rice flour. However, the filtered residue of liquefied rice slurry could be recovered as high-protein rice flour. The particle size of rice flour had a small effect on the glucose yield. The orthogonal-array table (L27) method of experimental design was employed to determine optimum conditions for liquefaction. The glucose yield based on starch was 90.8±3.6% under the following optimum conditions α-amylase, 0.12%; rice flour, 20%; temperature, 96°C; time, 90 min. The filtrate from liquefied rice slurry was saccharified at 60°C with three different concentrations of glucoamylase. The higher the enzyme concentration, the shorter the time required to reach the maximum yield. After saccharification, the glucose solution was decolourised, desalted and concentrated to 40% d.s. and then isomerised to fructose at 60°C under continuous operation by using immobilised glucose isomerase packed in a column. The isomerised syrup was then purified and concentrated to 71% d.s. The final high-fructose rice syrup contained 50% glucose, 42% fructose and 3% maltose. After liquefaction, the rice slurry was centrifuged and the precipitate was dried by either spray or drum drying. The composition of these two high-protein rice flours was almost the same and the protein content was about three times as high as the raw material. There were significant differences in surface structure of rice flour and high-protein rice flours, as observed by the scanning electron microscope. 相似文献
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Jin-Cheol Lee Jong-Dae Kim Fu-hung Hsieh & Jong-Bang Eun 《International Journal of Food Science & Technology》2008,43(6):1078-1082
Puffed rice cakes were produced from a blend of ground black rice (GBR) and medium‐grain brown rice (GMBR) by using a rice cake machine. Effects of moisture content, heating temperature and heating time on quality of the black rice cake were investigated. The specific volume of black rice cakes showed an increasing trend with increasing tempering moisture, heating temperature and heating time. The hardness of puffed black rice cake decreased as tempering moisture and heating time increased, and was influenced more by GMBR content than heating temperature. In general, the black rice cake lightness and yellowness decreased steadily with increasing GBR content, while tempering moisture, heating temperature and heating time did not significantly affect the colours of black rice cake. On the contrary, the redness increased with increasing GBR contents. The weight loss during tumbling was not found at all puffing conditions. 相似文献
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高纯度大米蛋白和淀粉的分离提取 总被引:16,自引:1,他引:16
高纯度的大米蛋白和大米淀粉可以作为大米综合利用的两个主产品,本研究采用碱法将大米蛋白和淀粉分离,研究表明最适提取条件是:NaOH求度0.05N,提取2h此条件下分离体系不受破坏,且大米蛋白的蛋白含量可达94.03%(干基),蛋白得率63.37%;大米淀粉中蛋白含量0.39%(干基),淀粉得率47.87%。 相似文献
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绿米、红米、黑米的食用品质研究 总被引:3,自引:1,他引:3
测定了绿米、红米、黑米的直链淀粉含量和胶稠度 ,并利用粘度仪和物性仪测定了绿米的糊化粘度特性和物性 ,还进行了食味品尝试验。试验结果证明 ,绿米、红米、黑米具有白粳米所不具有的功能特性。 相似文献
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测定了英国市场上销售的Basmati(白米,糙米)(长粒米),泰国香米(长粒米),日本大米(短粒米)样品中RS3的含量,比较长粒米和短粒米在熟化过程的稳定性以及不同米制品中含量的差异.结果表明,短粒大米RS3含量高于长粒大米;熟化过程对RS3含量的影响巨大,其中白米米粉在熟化过程中RS3含量下降的程度低于糙米米粉,长粒米米粉、短粒米米粉在熟化过程中RS3含量下降的程度差异不大;保鲜米饭与同品种大米制作熟化大米粉的RS3含量基本相当. 相似文献
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<正> 自从世上出了锄暴安良的英雄李逵,就有了剪径作恶的李鬼;有西子捧心,就有东施效颦,似乎万能的上帝,也与我辈小民过不去,凡有真善美的地方,必有假恶丑滋生闹事。此类怪现象,在我国食品市场尤甚!真货与假货如双胞胎,惟妙惟肖,形影相随,演绎出一幕幕真李逵、假李逵,真假李逵谁怕谁的人间闹剧,严重破坏了市场秩序,威胁着广大民众的生命安全。 假货不除、民无宁日,猖獗的假 相似文献
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以早籼米为原料制成米饭并将其干燥研磨成粉末分别以5、10、15、20、25、30、35%的比例与生大米粉末混合,通过对大米粉的糊化和凝胶等理化特性以及粉条的蒸煮损失和拉伸性能进行分析,并结合感官评分,研究米饭添加量对大米粉性质及粉条品质的影响。结果表明:不同的米饭添加量糊化特性指标存在显著差异(P<0.05),主要是大米粉的糊化温度与米饭添加量成正比,峰值黏度、衰减值与米饭添加量成反比;其中添加量为15%的大米粉凝胶硬度、弹性、咀嚼性和回弹性最大,均显著(P<0.05)高于其他样品;溶解度和膨胀力则受米饭添加量的影响不显著。在粉条品质方面,米饭添加量≦15%时,随着米饭的添加,粉条的断条率、吐浆值降低,抗拉伸阻力、延伸度增大,感官品质提升;米饭添加量>15%时,则相反。因此,当米饭添加量为15%时,粉条的综合品质最佳。 相似文献
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《食品与发酵工业》2017,(1):186-191
从湖北省孝感市采集了15个凤窝酒曲样品,以籼米和糯米为原料进行了米酒的酿造,并采用电子舌和色度仪对米酒的品质进行了评价分析。通过主成分分析、多元方差分析和非加权组平均法分析发现,以籼米和糯米为原料酿造的米酒整体滋味品质存在显著差异(P0.05)。通过冗余分析发现该差异是由于涩味、咸味、甜味、丰度(鲜的回味)和后味A(涩的回味)等5个指标导致的。经配对t检验发现,以籼米为原料酿造的米酒其涩味、咸味、甜味和后味A(涩的回味)及L*、a*和b*值均显著高于糯米(P0.05)。使用高效液相色谱法检测发现柠檬酸、苹果酸、乳酸和乙酸为米酒中的主要有机酸,且其在以籼米为原料酿造的米酒中的含量显著偏高(P0.05)。由此可见,以糯米为原料酿造的米酒其滋味和色泽品质要优于籼米。 相似文献