微胶囊粉末橙汁香精研制

对微胶囊粉末橙汁香精进行了研制,探索了工艺条件,对微胶囊壁材进行了选择     

维生素E功能及其微胶囊化

该文介绍维生素E的组成、结构和生理功能,比较维生素E微胶囊化各种方法,并重点介绍喷 雾干燥法工艺。     

Microencapsulation of β‐carotene using native pinhão starch,modified pinhão starch and gelatin by freeze‐drying

Beta‐carotene was microencapsulated by freeze‐drying using native pinhão starch, hydrolysed pinhão starch 6 dextrose equivalent (DE), hydrolysed pinhão starch 12 DE and the mixture of these materials with gelatin as coating material. The purpose of this research was to produce and characterize these microcapsules. The capsules’ efficiency, surface content, moisture, morphology, solubility, particle size and glass transition temperature were analysed. The hydrolysed pinhão starch 12 DE showed the highest total β‐carotene content and the lowest surface β‐carotene content, unlike the native starch. Using scanning electron microscopy, it was observed that all microcapsules presented undefined shapes. The samples with gelatin had wider particle size distribution, higher diameters, lower solubility and higher glass transition temperature when compared with other the samples. Results obtained suggest that the modified pinhão starch can be considered as potential wall material for encapsulation of β‐carotene.     

喷雾干燥法制备无花果微胶囊的研究

以阿拉伯胶和麦芽糊精为壁材,以无花果的乙醇提取物为芯材,用喷雾干燥法制取无花果微胶囊粉。通过正交试验分析,确定了最佳生产工艺条件:芯材与壁材的比例为1:4,阿拉伯胶与麦芽糊精的比例为1:1,固形物浓度为30%,乳化剂用量为0.3%,30 MPa均质2遍,进风温度为200℃,出风温度为81℃。生产出的微胶囊无花果粉色泽、溶解性好,水、表面油含量低,无甚粘壁现象,适合于工业化生产。     

Preparation and optimisation of liposome‐in‐alginate beads containing oyster hydrolysate for sustained release

Oyster (Crassostrea gigas) hydrolysate shows antihypertensive effect in our previous study. Oral administration of oyster hydrolysate can loss bioactive peptides due to enzymatic degradation in vivo. To maximise its bioavailability, liposome‐in‐alginate (LA) beads were used to encapsulate the oyster hydrolysates to protect from degradation and obtain sustained release. The preparation conditions of the LA beads were optimised by response surface method using a model peptide of tyrosylalanine (YA). Their characterisation, swelling and release properties were investigated. The optimised conditions for the concentration of calcium chloride, sodium alginate and the amount of ethanol‐dissolved lecithin (EDL) were 0.5 m , 3% and 95.4 mg, respectively. The encapsulation efficiencies of YA and the oyster hydrolysate in the optimised condition were 74.9% and 84.3%, respectively. The release time of the oyster hydrolysate in the simulated gastrointestinal fluid was up to 16 h. The LA beads can be recommended to encapsulate oyster hydrolysate for bioavailability improvement.     

鱼油微胶囊技术的研究

采用喷雾干燥法对鱼油进行微胶囊化 ,并对产品进行质量评定。结果表明 :壁材阿拉伯胶、糊精、玉米糖浆的最佳配比为 3∶ 3∶ 4 ,芯材占壁材的添加量为 30 % ,乳化温度为 5 0～ 60℃ ,乳化剂添加量为 0 8% ,喷雾干燥的进风温度为 2 0 0℃ ,制得的产品质量较高 ,产品水分含量为 2 30 % ,溶解度为 94 7% ,颗粒直径 38μm,且感官质量较高。     

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。     

Fish oil microencapsulation as influenced by spray dryer operational variables

The effects of spray‐drying air temperature, aspirator rate (drying air mass flow rate), peristaltic pump rate (feed mass flow rate) and spraying air mass flow rate on microencapsulation properties of fish oil including moisture content, particle size, bulk density, encapsulation efficiency and peroxide were investigated. The process was carried out on a mini spray dryer, and skim milk powder was used as the encapsulating wall material. Results indicated that increasing inlet air temperature increased the particle size, encapsulation efficiency and peroxide value but decreased the bulk density and moisture content of product. Increasing aspirator rate resulted in increased particle size and peroxide value but decreased the moisture content and bulk density. Increase in feed mass flow rate increased the moisture content, particle size, bulk density and peroxide value but decreased the encapsulation efficiency of microcapsules. The encapsulation efficiency and bulk density increased with the increasing aspirator rate but moisture content, particle size and peroxide value decreased.     

薄荷酰胺超细胶囊的制备及表征

薄荷酰胺具有浓烈的苦味及刺激性气味,挥发性强,持效性较差。微胶囊技术有利于克服这些缺点。以聚乳酸为囊壁、薄荷酰胺为囊芯,采用溶剂挥发法制备了微胶囊化薄荷酰胺。红外光谱分析表明,聚乳酸已包覆到薄荷酰胺上;扫描电镜和激光法粒径分布证明,微胶囊化薄荷酰胺的粒径分布范围为50～200μm;差示扫描量热法和热失重法分析表明,包覆聚乳酸后的薄荷酰胺的熔融及热稳定性能得到了显著的提高。因此,经聚乳酸微胶囊化后的薄荷酰胺,其应用范围可得到进一步的拓展。     

酶法水解的亚铁肽微胶囊化的工艺研究

以麦芽糊精和β-环糊精为壁材，采用超声波法包埋亚铁肽形成微胶囊，通过正交试验研究了微胶囊化过程中的最佳工艺条件。结果表明：用超声波法制备亚铁肽的最佳工艺条件是：芯壁比为1：6，麦芽糊精：β-环糊精为70％：30％，包埋时间为20min，糊精浓度为33％，亚铁肽的包埋率可达80％以上。