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研究半干牛肉的加工工艺,筛选出氯化钠、乳酸钠、丙三醇、丙二醇等理想的水分活度降低剂(RAA);空气温度40℃,相对湿度64%,空气流速0.38m/s的干燥条件,干燥60min可以制得含水27.98%,Aw=0.543半干牛肉食品,有效地缩短了干燥时间。 相似文献
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1 肉块的配制无论是瘦肉还是肥膘,使用低菌数的优质肉是首要的。除了牛肉和猪肉,其它种类的肉也可以用。火鸡肉、鸡肉可与牛肉、猪肉配合使用或者用100%的鸡肉。用火鸡肉或鸡肉是为了降低胆固醇含量的需要,也即降低了配方成本而未减少总蛋白含量。使用火鸡肉的另一优点是它可以减少肉棒中消费者不喜欢的胶原蛋白含量。 相似文献
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半干鸡肉生产及降低制品水分活度的研究 总被引:2,自引:1,他引:2
研究了半干鸡肉的生产方法。重点试验了用不同浓度的磷酸盐、丙三醇、丙二醇对鸡肉进行腌制处理 ,生产半干鸡肉 (含水量为 2 5 %~ 3 0 % )对制品水分活度的影响。结果表明 ,m [焦磷酸钠 (Na4P2 O7) ]∶m [三聚磷酸钠 (Na5P3 O10 ) ]∶m [六偏磷酸钠 ((NaPO3 ) 6) ]为5∶5∶4时 ,产品水分活度最低为 0 .5 7;丙三醇比丙二醇降低半干鸡肉水分活度的能力强 ,二者共同添加有协同作用 ,最佳添加量为丙三醇 3 % ,丙二醇 2 %。 相似文献
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以大米粉蛋白质含量、米粉断条率、感官评分为指标,研究发酵温度、发酵时间、菌液添加量、磨粉粒度、加水量、糊化温度和糊化时间对发酵型半干米粉品质的影响,确定发酵型半干米粉的加工工艺参数为:发酵温度35 ℃、发酵时间18 h、菌液添加量4%、粒度120目、加水量60%、糊化温度95 ℃、糊化时间4 min。在此条件下,发酵大米粉的蛋白质质量分数为6.37%,发酵型半干米粉断条率为4.94%,感官评分为86.43。大米发酵后基本成分发生改变,蛋白质和脂肪含量下降,淀粉含量增加。糊化特性和热特性分析结果表明:大米发酵后最低粘度、最终黏度、回生值、糊化温度显著降低,说明发酵处理有利于大米粉的糊化,并能延缓米粉制品的老化。 相似文献
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半干鸭血干加工工艺及食用品质的研究 总被引:2,自引:0,他引:2
研究半干鸭血干的加工工艺和食用品质。将鸭血用3种不同方式进行卤制,通过感官评定选出最佳卤制方式,后通过热风干燥、微波干燥及微波真空干燥对卤制过的鸭血进行干制,控制水分含量在38%左右,比较后得出最理想的半干鸭血干。对半干鸭血干和鸭血豆腐进行质构、色泽、感官及硫代巴比妥酸(thiobarbituric acid,TBA)值的对比,结果显示:与鸭血豆腐相比,半干鸭血干具有较好的棕红色色泽,硬度适中、弹性良好、有嚼劲儿,贮藏时间较长,便于携带和食用。因此,半干鸭血干的研发为更好的开发鸭血产品提供了一条新思路。 相似文献
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《食品与发酵工业》2019,(16):40-47
为研究湿态和半干态泡菜挥发性风味变化特征及其差异性,应用顶空固相微萃取-气相色谱质谱联用法(HS-SPME-GC-MS)结合多元统计方法分析2种泡菜发酵过程中的重要挥发性成分。结果表明,湿态和半干态发酵泡菜水分活度(A_W)差异明显,湿态泡菜更有利于乳酸菌生长。基于主成分和层次聚类分析,2种泡菜挥发性成分区分明显,其中湿态泡菜以发酵产生的含硫化合物和醇类为主,半干态泡菜以原料自身的含硫化合物为主。采用偏最小二乘法判别分析筛选出重要度(VIP>1.2)以及t检验(P<0.05)的二甲基三硫醚、1-异硫氰酸戊酯、5-甲硫基戊腈、5-甲硫基-2-戊烯-4-炔醇、乙酸、2,3-丁二醇、庚基氢过氧化物和甲氧基苯肟为2种泡菜差异性标志物。研究结果对调控泡菜品质、风味具有一定指导意义。 相似文献
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以条斑紫菜为加工原料,探讨半干调味即食紫菜的加工过程和关键工艺技术.研究表明:当蔗糖使用量为6%、丙三醇的使用量为3%、水分活度达到0.65以下时,水分含量为22%,产品的色泽、质地、组织结构和风味皆较好,可以长期保藏. 相似文献
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Tetsuo Kawai Dr. Morihiko Sakaguchi 《Critical reviews in food science and nutrition》1996,36(3):257-298
This article reviews features of flavor in three groups of fishes and summarizes them as follows: (1) fresh saltwater fish are nearly odorless because they contain a small quantity of volatiles; (2) freshwater fish give off pyrrolidine and earthy‐odor compounds, which are responsible for their maturity and surrounding water pollution, and (3) euryhaline fish exhibit a variety of unsaturated carbonyls and alcohols derived from enzymatic and nonenzymatic oxidation of polyunsaturated fatty acids (PAs). These features are discussed, as are the effects of different enzymatic activities on PA oxidation and the effects of pH on mechanisms of formation of the volatiles. The monotonous volatile constitution of saltwater fish is likely caused by an unknown antioxidation system restraining the fish from oxidizing. The variety of constitution of euryhaline fish, especially that of anadromous fish under spawning conditions, could result from the loss of that system. The thermal environments of heated foods are also reviewed. The basic environment of fish, which allows the formation of the flavor compounds, is discussed to confirm the volatiles found in unheated fish. 相似文献
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鱼油脂肪酸乙酯化工艺研究 总被引:11,自引:0,他引:11
比较三种不同鱼油原料脂肪酸组成、含量和各项品质指标,选取步鱼油用碱催化法进行乙酯化反应。通过单因素实验和响应面分析,步鱼油乙酯化工艺最优条件为:无水乙醇/鱼油反应物摩尔比为6:1,反应温度为75℃~77℃,反应时间2小时,碱催化剂浓度为0.8N~1.0N,由分子蒸馏得到乙酯化得率为96%。 相似文献
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选取18颗北海海水养殖珍珠为研究对象,通过激光拉曼光谱仪、红外和紫外—可见—近红外光谱仪以及激光剥蚀电感耦合等离子体质谱仪分析,系统研究了北海珍珠的谱学和化学成分特征。谱学结果显示北海珍珠的红外—拉曼谱峰均与文石的官能团振动吻合,指示矿物成分为文石;紫外—可见—近红外谱峰是文石结构和有机致色分子共同作用的结果,其中,350~400nm范围内的两个弱峰可能是北海珍珠独有的特征峰;激光剥蚀电感耦合等离子体质谱分析结果显示北海珍珠具有高Mg、B、Sr、Na和K,低Mn、P和Ba的特征。北海珍珠的化学组成与典型海水珍珠相似,而与淡水珍珠有明显差别,因而可用于指示其生长环境。 相似文献
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《Food Reviews International》2013,29(2):159-174
Since the bovine spongiform encephalopathy crisis, there has been a growing interest for finding an alternative source of raw materials for gelatin production. Gelatin produced from fish processing by-products is a potential alternative to mammalian gelatin. Fish processing generates solid wastes that can be as high as 50–80% of the original raw material. These wastes are an excellent raw material for preparation of high protein foods. About 30% of the wastes consists of skin and bone with a high collagen content. Fish gelatin can be obtained by hydrolysis of collagen the principal protein found in skin and bone. Fish skin and bone gelatin can be prepared with bloom strength similar to that obtained from mammalian sources. Fish gelatin has numerous applications, particularly, in the food, pharmaceutical, and photographic industries due to its unique chemical and physical properties. This review presents how fish processing by-products can be utilized in the manufacture of gelatin. 相似文献
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Since the bovine spongiform encephalopathy crisis, there has been a growing interest for finding an alternative source of raw materials for gelatin production. Gelatin produced from fish processing by-products is a potential alternative to mammalian gelatin. Fish processing generates solid wastes that can be as high as 50-80% of the original raw material. These wastes are an excellent raw material for preparation of high protein foods. About 30% of the wastes consists of skin and bone with a high collagen content. Fish gelatin can be obtained by hydrolysis of collagen the principal protein found in skin and bone. Fish skin and bone gelatin can be prepared with bloom strength similar to that obtained from mammalian sources. Fish gelatin has numerous applications, particularly, in the food, pharmaceutical, and photographic industries due to its unique chemical and physical properties. This review presents how fish processing by-products can be utilized in the manufacture of gelatin. 相似文献
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