粉末化榛仁油乳化工艺研究

以大豆分离蛋白(SPI)、麦芽糊精和黄原胶为壁材,以蒸馏单甘酯和蔗糖脂肪酸酯为复合乳化剂制备微胶囊化榛仁油粉末油脂,对榛仁油微胶囊化的乳化工艺进行研究.结果表明,较佳的乳化工艺为:壁材比(大豆分离蛋白:麦芽糊精:黄原胶)10:3:1、芯材/壁材1:2、复合乳化剂含量0.4%(单甘酯/蔗糖酯4:6),乳化温度75℃.     

高载量微胶囊化棕榈仁油粉末油脂的制备

采用喷雾干燥法制备高载量(60%)微胶囊化棕榈仁油粉末油脂,对其制备工艺条件进行优化,并对获得的微胶囊化棕榈仁油粉末油脂的性质进行分析。研究结果表明:高载量微胶囊化棕榈仁油粉末油脂的最佳工艺条件为:辛烯基琥珀酸酯化(OSA)变性淀粉与麦芽糊精质量比为2∶1,黄原胶添加量为0.15%;乳化剪切速率为9 500 r/min,乳化时间为3 min,均质压力为40 MPa,均质次数为2次;进风温度为190℃,出风温度为85～95℃。用该法制备获得的高载量微胶囊化棕榈仁油粉末油脂为白色均匀粉末,理化性质良好。     

紫苏油粉末制备工艺研究

以脱皮、低温压榨紫苏油为芯材,利用乳化和喷雾干燥相结合的方法制备紫苏油粉末.确定的最佳制备工艺条件为:壁材大豆分离蛋白与麦芽糖糊精的比例1:1.2,乳化温度70 ℃,固形物含量25%,芯材壁材比40:100;均质压力50 MPa,均质2次;喷雾干燥进风温度168 ℃,出风温度85℃.该条件下制备的紫苏油粉末微胶囊化效率达95%,表面油含量为1%左右.     

蚕蛹油微胶囊化工艺初探

蚕蛹油不饱和脂肪酸含量高达60%以上,极易氧化变质,使其应用受到限制.将蚕蛹毛油精炼后,采用喷雾干燥微胶囊化技术制成固体粉末油脂,可以克服这些缺点.采用正交试验对微胶囊化的工艺参数进行了优化,得到最佳工艺参数为:均质压力40 MPa,进风温度185℃,出风温度80℃.     

喷雾干燥法制备微胶囊化山葡萄籽油粉末油脂

研究了喷雾干燥法制备微胶囊化山葡萄籽油粉末油脂的工艺,评价了微胶囊产品的质量,并预测了其保质期.研究结果表明:(1)微胶囊化山葡萄籽油的最佳乳化条件为:阿拉伯胶为壁材,麦芽糊精为壁材填充物;复合乳化剂配比(单甘酯:蔗糖酯)为1:9;乳化温度为80℃;乳化剂用量0.75%;壁材用量20%;壁材比(阿拉伯胶:麦芽糊精)为1:5;油/壁材为0.5.喷雾干燥法制备山葡萄籽油微胶囊的最佳工艺参数为:进料温度50～60℃、均质压力40 MPa、进风温度180℃、出风温度80℃、喷雾压力180 kPa.在此工艺条件下微胶囊化效率可达77.36%.(2)喷雾干燥法制取的微胶囊化山葡萄籽油粉末油脂为乳白色粉末,密度0.7312 g/cm~3,含水量2.76%,溶解度94.0%.通过扫描电镜观察,微胶囊颗粒较圆整,基本接近球形,平均颗粒直径(3.6±0.75)μm.(3)贮藏稳定性试验表明,经微胶囊化的山葡萄籽油,其贮藏稳定性要明显优于未微胶囊化的山葡萄籽油以及添加了抗氧化荆VE的山葡萄籽油制品.     

沙棘油微胶囊化工艺研究

研究了含油量30%的微胶囊化沙棘油粉末配方中乳化剂的选择、配比及用量,同时对加工工艺参数如乳化温度、均质压力、喷雾干燥进风、出风温度进行了考察.研究结果表明,采用柠檬酸单甘酯、蔗糖酯170、蔗糖酯1570,按2:3:3配比,复合乳化剂用量2.2%～2.6%.此时适宜的乳化温度为65～75℃,均质压力为30～40 MPa,喷雾干燥进风温度低于210℃.出风温度100℃左右.     

微波提取肉桂油树脂及其微胶囊化的研究

采用肉桂为原料,以乙醇为溶剂,应用微波提取技术所得的油树脂为芯材,以食用胶为壁材,经均质、喷雾干燥而得肉桂油树脂微胶囊。通过正交试验获得肉桂油树脂最佳提取条件、微胶囊最佳配方和微胶囊化的最佳工艺条件。试验表明：肉桂油树脂最佳提取条件为乙醇浓度85%、料液比为1：8、颗粒度40目、功率200W,在此条件下,提取率为10.98%;微胶囊最佳配方为明胶：阿拉伯胶为1：1、料液质量分数25%,芯材载量25%;微胶囊化的最佳工艺条件为：进风温度170℃,出风温度70℃,均质压力30 MPa,进料温度55℃。在上述条件下肉桂油树脂微胶囊产品的包埋率为93.92%。     

大鲵油微胶囊制备工艺优化及其理化性质研究

以β-环状糊精和阿拉伯胶为壁材,通过喷雾干燥法制备大鲵油微胶囊。通过单因素实验和正交实验研究进风口温度、进料速率、均质时间和均质转速对大鲵油微胶囊包埋率的影响,并研究微胶囊产品的理化性质。结果表明:大鲵油微胶囊制备的最佳工艺条件为进风口温度190℃、进料速率3.5 m L/min、均质时间9 min和均质转速10 000 r/min,在此条件下大鲵油微胶囊包埋率达到94.73%。所得微胶囊水分含量为(3.05±0.04)%,休止角为(35.41±0.37)°,休止角在30°~45°之间,堆密度为0.28 g/cm~3,粒径为5~10μm,表面油和总油含量分别为0.58 g/100 g和11.07g/100 g;微胶囊粉末黏度小,形状规则,表面光滑,流动性较好。表明所得大鲵油微胶囊品质良好。     

均质压力及喷雾干燥温度对鱼油微胶囊化的影响

采用辛烯基琥珀酸酯淀粉Hi-Cap100和葡萄糖浆作为鱼油微胶囊的壁材。研究了不同均质压力下乳化液黏度、粒径和粒径分布规律,考察了不同均质压力下乳化液特性与鱼油微胶囊包埋率、表面油含量之间的相关性,探讨了喷雾干燥温度对包埋率和鱼油过氧化值(POV)的影响。研究结果表明,随着均质压力的增加,乳化液黏度和平均粒径逐渐减小,而粒径分布离散度总体呈下降趋势,在40MPa时最小,说明此时粒径分布均一性最佳;喷雾干燥温度增加时,鱼油包埋率先增后减,POV值先减后增,在进/出口温度为140℃/70℃时有最高的包埋率和最低的POV值。通过分析确定最佳工艺参数如下,均质压力为40MPa,喷雾干燥进口温度为140℃,出口温度为70℃。在上述最适工艺条件下,鱼油微胶囊平均粒径为5.97μm,表面油含量为2.03%,微胶囊化包埋率为95.6%,在扫描电镜下观察微胶囊表面和内部结构良好,具有良好的包埋效果。     

牛肉香精微胶囊化的研究

以微胶囊化效率作为选择的指标,对均质和喷雾干燥的条件进一步优化,确定了最佳的均质和喷雾干燥的工艺参数:均质压力3级,进风温度180℃,出风温度100℃。当乳化剂添加量为0.4%,明胶∶卡拉胶为3∶7,香精添加量为40%时,微胶囊化的效率最高,达到91.26%。微胶囊化后的牛肉香精香型稳定、留香时间长、颜色均一、流动性好、扩散快。     

Differential scanning calorimeter application to the detectionof refined hazelnut oil in extra virgin olive oil

The potential application of differential scanning calorimetry (DSC) to verify adulteration of extra virgin olive oil with refined hazelnut oil was evaluated. Extra virgin olive oil and hazelnut oil were characterised by significantly different cooling and heating DSC thermal profiles. Addition of hazelnut oil significantly enhanced crystallisation enthalpy (at hazelnut oil ?20%) and shifted the transition towards lower temperatures (at hazelnut oil ?5%). Lineshape of heating thermograms of extra virgin olive oil was significantly altered by hazelnut oil addition: a characteristic exothermic event originated at −27 °C in extra virgin olive oil and progressively disappeared with increasing hazelnut oil content, while the major endothermic peak at −3.5 °C broadened (at hazelnut oil ?40%) and the minor endothermic peak at 8 °C shifted toward lower temperatures (at hazelnut oil ?5%). The preliminary results presented in this study suggest that DSC analysis may be a useful tool for detecting adulteration of extra virgin olive oil with refined hazelnut oil.     

Effect of replacing beef fat with hazelnut oil on quality characteristics of sucuk - A Turkish fermented sausage

Turkish fermented sausages (sucuk) were produced by replacing 15, 30 and 50% of beef fat with hazelnut oil incorporated as pre-emulsified with simplesse^® 100 (whey protein powder) Each treatment was formulated to contain 20% total fat and beef fat was the only fat material used in the control (C) group. After 12 days of fermentation and ripening, all sucuk samples had TBA values within acceptable limits (<1.0). Increasing levels of hazelnut oil in sucuk formulation increased penetrometer values (softer texture) and moisture content. Hazelnut oil replacement had a significant effect on redness values of the samples. Cholesterol content decreased progressively as the percentage of hazelnut oil increased in the formulation. Replacement of 50% beef fat with 50% hazelnut oil significantly increased MUFA, PUFA and MUFA + PUFA/SFA ratios. The use of hazelnut oil resulted in significant decreases in the slice appearance, texture and taste scores. However there was no significant difference in the overall acceptability score of samples, except those in which hazelnut oil replaced 15% beef fat, which had the highest score.     

榛子油微胶囊的制备及其稳定性研究

为缓解榛子油的氧化速度,增加储藏期和扩大其应用范围,本研究以β-环糊精（β-cyclodextrin, β-CD）为壁材,采用超声波辅助分子包埋法制备榛子油微胶囊,通过响应面法优化了微胶囊的工艺条件,同时对其理化性质进行了测定。结果表明:当壁材浓度（H₂O/β-CD）为16:1、壁芯材比例为5:1、包埋时间为62 min和包埋温度为59.3 ℃时,微胶囊的包埋率达到69.18%,产率达到59.74%。微胶囊的平均粒径为880.4 nm,水分含量为2.85%,溶解度为55.95%,休止角为42.49°。通过扫描电镜、红外光谱和热重分析等结果表明,微胶囊为块状、菱形片状或不规则柱状结构,包埋物已形成,同时具有良好的热稳定性。加速氧化实验表明,微胶囊化可以有效减缓榛子油的氧化速度,延长货架期,扩大其应用范围。     

HI-CAP 100为壁材微胶囊化共轭亚油酸研究

以HI-CAP 100为壁材用喷雾干燥法制备微胶囊化共轭亚油酸,对喷雾干燥工艺中料液固形物含量、一级均质压力、喷雾干燥进风温度和产品中亚油酸载量四个参数进行优化。通过四因子二次回归正交设计组合试验确定喷雾干燥工艺参数：固形物含量为40%、一级均质压力为25 Mpa、进风温度为185℃,载量为45%;在此条件下所得共轭亚油酸微胶囊化效率为93．02%。     

微胶囊化玉米胚芽油粉的研制

以玉米胚芽油为芯材,CMC和大豆分离蛋白为壁材,单甘酯与蔗糖酯为乳化剂,对喷雾干燥法制备玉米胚芽油微胶囊的工艺条件进行研究.确定制备玉米胚芽油微胶囊的最佳工艺条件为乳化剂(单甘酯:蔗糖酯=1:4)添加量为2%,CMC与大豆分离蛋白之间的比例为1:5,复合壁材添加量为22%,芯材添加量为18%,乳化温度为80℃、乳化时间...     

肉桂-丁香-百里香精油微胶囊的制备及表征

为了获得用于不同运输条件下对稻谷中的霉菌具有天然抑菌效果的精油微胶囊,以肉桂、丁香和百里香精油为芯材,以明胶、阿拉伯胶为壁材,采用复凝聚法制备肉桂-丁香-百里香精油微胶囊.通过热重分析法和扫描电镜分析精油微胶囊的结构和理化特性,并对精油微胶囊在霉变稻谷中的缓释抑菌效果进行比较.结果表明,制备精油微胶囊的最优工艺条件为:...     

月见草油微胶囊粉末油脂中油脂过氧化值测定之提油方法的研究

为测定月见草油微胶囊粉末油脂中油脂过氧化值,比较了碱性乙醚法、机械研磨法、超声波振荡法提油的优劣,结果表明:碱性乙醚法提油率虽高(94.69%),但测得的POV值与原料油相比偏高很多,明显失真;机械研磨法提油率偏低(40.68%),且不稳定,不宜采用;超声波振荡法提油率居中(59.63%),重现性好,精确度高,POV测定值与原料油最接近;试验还表明超声振荡时间以3min为宜。     

Extractable oil in microcapsules prepared by spray-drying: Localisation,determination and impact on oxidative stability

Aim of the present study was to investigate the localisation of the extractable oil in spray-dried microencapsulated fish oil prepared under different spray-drying conditions and to investigate the impact on lipid oxidation upon storage. Confocal laser scanning microscopy, scanning electron microscopy and different extraction procedures revealed that the extractable oil in microencapsulated fish oil is mainly located on the surface and in oil droplets close to the surface. Consequently, different methods for determination of the different fractions are proposed. Lipid oxidation as determined by hydroperoxide content or anisidine value was higher in microcapsules with 50% oil load spray-dried at 210/90 °C, propanal content was increased in samples with 30% oil load spray-dried at 210/90 °C. The differences in stability could only partly be explained by the varying amount of extractable oil. It is concluded that the surface oil protects other fractions of the extractable oil and that the extractable oil cannot be used to predict shelf-life of microencapsulated oils.