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以“曲拉”为原料，研究不同酶在凝乳酶干酪素制作中的应用效果，通过L9(34)正交试验对皱胃酶、木瓜凝乳酶、微小毛霉凝乳酶3种酶最佳工艺参数进行筛选，结合生产成本，优选出微小毛霉凝乳酶为生产凝乳酶干酪素的酶制剂，其最佳工艺条件为酶浓度3.75 mL/g，pH 7，温度55℃，CaCl2添加量12 g/kg。制品出品率73.49%，感官得分9.49，蛋白质含量85.25%，灰分7.23%，脂肪0.45...
牦牛曲拉干酪素脱色工艺优化
漂白剂 干酪素 脱色 红外光谱分析
2007/8/10
用曲拉生产干酪素的过程中，加碱、加热及原料所含的杂质都会促进干酪素发生美拉德反应，产生黄色或褐色物质，影响干酪素的品质。该研究选用保险粉(低亚硫酸钠)、亚硫酸钠、亚硫酸氢钠3种漂白剂，采用L25(56)正交试验设计，对试验结果进行分析，确定出漂白剂的最佳用量为：每8 g曲拉添加保险粉Ⅰ0.15 g、亚硫酸钠0.4g、亚硫酸氢钠0.375 g、保险粉Ⅱ0.2 g。对曲拉原料、曲拉干酪素、鲜奶干酪素进...
采用SLG67-18.5双螺杆挤压机优化亚麻籽脱毒工艺。通过二次正交旋转组合设计试验，研究了温度、含水率、螺杆转速、喂料速度对亚麻籽中氰华氢(HCN)去除率的影响。单因素分析表明，亚麻籽中HCN去除率随温度升高、含水率增加、螺杆转速提高而升高；随喂料速度增加呈抛物线，中等喂料速度脱毒效果更好。利用频数分析法进行优化，得到亚麻籽中HCN去除率有95%的可能高于90%的参数范围，即膨化温度为147～1...
对油茶籽油进行不同组别的天然抗氧化剂抑制油酸氧化的试验，并进行了采用不同有机膜材料脱胶提高油酸含量的L9(34)正交试验。试验结果表明：采用0.015% 维生素C+0.02％维生素E+0.02%柠檬酸的复合天然抗氧化剂，可使油酸含量达82.3%；采用有机膜材料—聚丙烯膜可使磷脂胶束脱除率达99.6%，使最终产品的油酸含量达82.6%。
速溶牦牛油茶生产工艺及参数研究
速溶 油茶 生产工艺 参数
2007/8/10
通过L9(34)正交试验选择出最佳膨化工艺参数：进料速率0.9 kg/min，模具预热温度160℃，原料含水率15%；兼顾营养和膨化度确定大豆、青稞的混合膨化比例为15∶85；利用高压提取、减压浓缩技术，提取生长在海拔3 400多米高寒草地牦牛骨髓油，配以混合膨化粉及其他辅料，通过造粒、远红外干燥、自动计量包装等流水线生产，制成含蛋白质152 g/kg，热能17 556 kJ/kg、Ca 15.6...
银杏黄酮苷提纯工艺研究
银杏 黄酮苷 纯化 萃取工艺
2007/8/10
根据黄酮苷的物性选择丙酮，正丁醇，正丙醇，乙酸乙酯为萃取剂。单因素实验优选出正丙醇为萃取黄酮苷的主萃取剂。对其进行改性，通过单因素实验和正交实验优化出：水∶正丙醇=1∶25为萃取黄酮苷的较佳萃取剂。T=25℃，t=10 min，固液比=15∶1(g/100 mL)为其最佳萃取工艺参数。最后得到纯度＞50%，得率＞80%的总黄酮苷产品。为后续提纯分离打下较好的基础。
溶解氧是青霉素生产发酵过程中的重要参数之一,其浓度与菌体细胞的生长速度密切相关.在青霉素发酵过程溶解氧变化机理的基础上,将模糊神经网络和变结构预估控制方法相结合,研究了基于模糊神经网络的青霉素发酵过程溶解氧的变结构预估控制方法,设计了青霉素发酵过程溶解氧的变结构预估控制系统.实验结果表明,对青霉素发酵过程中的溶解氧浓度进行变结构预估控制,可以使溶解氧浓度的调节达到满意的效果,既降低氧消耗,又避免出...
Decontamination of Dry Food Ingredients and Seeds with “Soft-Electrons” (Low-Energy Electrons)
dehydrated vegetable seed decontamination, electron
2010/11/23
Electrons with energies of 300 keV or lower (soft-electrons) reduced microbial loads of grains, pulses, spices, dehydrated vegetables and seeds to levels lower than 10 CFU/g. The viscosity of gelatini...
Eggplant Extract Inhibits Melanogenesis in B16 Melanoma Cells
B16 melanoma cells melanogenesis eggplant tyrosinase
2010/11/23
Eggplant extract markedly inhibited melanogenesis in B16 mouse melanoma 4A5 cells (B16 cells). To clarify the characteristics of the melanogenesis inhibitor in eggplant, the effective fraction, P1, wa...
Okara is a by-product of tofu and soybean protein production. Okara contains 80-85% moisture. The dehydration of okara is very difficult with the conventional method. In the present work, okara was de...
Effects of Fermentation under Enriched Oxygen Atmosphere on Clonal Black Tea Aroma Complex
fermentation under enriched oxygen atmosphere volatile flavor compounds quality
2010/11/23
Enriching the atmosphere of fermenting “dhool” (macerated leaf) with oxygen led to faster production of some black tea volatile flavor compounds (VFC). There was a general rise in the total amounts of...
Properties of Protein Adsorption and Desorption of Alumina Ceramic Membrane
protein desorption ceramic membrane microfiltration
2010/11/24
The properties of protein adsorption and desorption of alumina ceramic membranes were investigated using several types of proteins. The effect of pH on the protein adsorption was studied by soaking th...
Separation and Determination of Yellow Gardenia Pigments for Food and Iridoid Constituents in Gardenia Fruits by Micellar Electrokinetic Chromatography
crocin crocetin geniposide gardenoside
2010/11/23
Micellar electrokinetic chromatography (MEKC) methods were developed for analyzing crocin and crocetin yellow gardenia pigments, and geniposide and gardenoside in gardenia fruits. Crocin and crocetin ...
Optical Isomers and Odor Thresholds of Volatile Constituents in Citrus sudachi
enantiomeric ratio odor threshold odor quality limited odor unit value
2010/11/23
The enantioselective analysis of the volatile components in Citrus sudachi peel oils was achieved using an enantioselective capillary gas chromatography (enantio-cGC) with α- and β-cyclodextrin column...
Comparison of Essential Oil Components between Leaf and Peel in Citrus Hybrids (‘Seto unshiu’בMorita ponkan’)
Ponkan Satsuma mandarin essential oil component
2010/11/23
The leaf oil components in hybrid seedlings of ‘Seto unshiu’ (Citrus unshiu MARC.) crossed with ‘Morita ponkan’ (Citrus reticulata BLANCO) as the pollen parent were examined. The leaf and peel oil com...