共查询到16条相似文献,搜索用时 78 毫秒
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为改善油脂可塑性和口溶性,及为开发以棕榈油产品为主要原料专用油脂产品提供理论依据,研究棕榈油硬脂(PSt)、棕榈油中间分提物(PMF)两者间相容性。测定二元混合体系固体脂肪含量(SFC)值,并通过计算其理论值与实测值之间差值△SFC,结合T–△SFC曲线、二元等温曲线等直观分析,结果表明:PSt与PMF混合物在25℃、PSt含量为30%~50%时,二者间偏晶现象严重;而在35℃~50℃时,二者间共晶现象较为严重;在0℃~10℃和30℃~35℃范围内,二者间具有较好相容性。 相似文献
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为扩大棕榈油中间分提物(PMF)在零/低反式脂肪酸人造奶油中的应用,对PMF、棕榈油硬脂(PSt)和大豆油的甘三酯组成、结晶及熔化特性进行分析。结果表明:PMF的甘三酯主要由二饱和型及单饱和型甘三酯POP、PLP、POO组成;PSt的甘三酯主要由三饱和型及二饱和型甘三酯PPP、POP组成;大豆油主要由三不饱和型及二不饱和型甘三酯LLL、OLL、PLL等组成。以PMF为主,复配PSt和大豆油作为人造奶油的基料油,可使人造奶油以二饱和型POP等形成β'结晶倾向,一定量的三饱和型甘三酯PPP等提供人造奶油的骨架结构,三不饱和型甘三酯LLL、OLL等填充高熔点甘三酯形成的网格,提高人造奶油的营养特性。PMF、PSt和大豆油三者的质量比为50∶30∶20时表现出良好的相容特性,按照这一质量比制备的人造奶油中的晶型为β'和β共存,且以β'为主,符合人造奶油的结晶及熔化性能要求。 相似文献
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《食品科技》2017,(3)
将作为棕榈油分提副产物的棕榈油中间分提物(PMF)应用于软冰淇淋生产,通过对比分析棕榈油分提副产物中6种不同熔点(30~40)℃的PMF与4种代表性市售软冰淇淋预拌粉中油脂的理化性质、脂肪酸组成及固体脂肪含量(SFC)发现,熔点为37.2℃的PMF(PMF-3)在(0~10)℃和(26.7~33.3)℃SFC值变化比较缓慢,而在(10~26.7)℃SFC迅速下降,最适宜应用于软冰淇淋的生产,且其所含饱和脂肪酸与不饱脂肪酸比例接近1:1,主要脂肪酸为棕榈酸和油酸,这种脂肪酸组成使PMF-3较其他食用油具有更好的热稳定性。因此,研究选择PMF-3作为生产软冰淇淋用的油脂。通过L_9(3~4)正交试验,对原料中PMF-3、脱脂乳粉、糖及麦芽糊精含量配比进行优化,结合感官评价分析,发现PMF-3的添加量为8%,脱脂乳粉的添加量为8%,麦芽糊精的添加量为1%,白砂糖的添加量为12%时生产的软冰淇淋硬度最适中,口感最佳。 相似文献
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棕榈油干法分提的工艺实践与研究 总被引:3,自引:1,他引:2
采用干法分提工艺对棕榈油进行分提,通过实践分析了工艺中结晶设备、原料组成、冷却状况、晶体异构对冷却结晶过程的影响,研究了压滤过程中的影响因素,给出了相关的技术参数,以期为实际生产提供指导和参考. 相似文献
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对棕榈油干法分提工艺进行了改进,将棕榈油结晶过程由不分时间段的持续降温改为分若干个时间段的快速降温、恒温、慢速降温的阶段式结晶方式,并对该改进工艺和主要设备性能进行阐述。实践表明,该改进工艺可以缩短结晶时间,降低能耗,提高生产效率,而且有利于保持产品质量的稳定。 相似文献
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干式分提是油脂物理改性过程,可得到高碘值的棕榈油(IV65和IV71)和高饱和度的棕榈硬脂。随着结晶罐结构(带超冷)的改进和膜式过滤机的使用,缩短了结晶时间,提高了液体油的得率和硬脂的纯度,使用PLC系统可准确控制结晶过程和过滤过程,降低分提成本。 相似文献
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Mahmood Akhtar Ian Blakemore Graham Clayton & Sarah Knapper 《International Journal of Food Science & Technology》2009,44(6):1139-1145
Spinning disc reactor (SDR) technology was tested to produce an ice cream base, which was subsequently used to make model ice cream. The ice cream base containing butterfat, lecithin, xanthan gum, sugar, skimmed milk and double cream was passed over the SDR disc spinning at 2900 rpm, heated at 80 °C and at a flow rate 6 mL s−1 . The physical properties of the SDR-processed ice cream base such as particle size and viscosity measurments, and of model ice cream including overrun, meltdown rate and sensory perception were investigated. The SDR-processed ice cream base exhibits narrow particle-size distribution (average particle d 32 = 1.65 μm, d 43 = 2.98 μm) and the viscosity was found to be similar at zero and 18 h ageing, whilst the model ice cream requires zero-hour ageing and has a high overrun value (∼85%) and slow meltdown rate as compared with a commercial sample. The results reveal that the SDR is capable of producing a highly stable ice cream base that requires significantly less ageing than the 18 h typically associated with the traditional process of making ice cream. The SDR process provides intense mixing of ingredients which facilitates the hydration of milk proteins and stabilisers. 相似文献
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K Nesaretnam N Robertson Y Basiron C S Macphie 《Journal of the science of food and agriculture》1993,61(4):401-407
Non-dairy creams made from hydrogenated palm kernel oil (HPKO) are generally more stable than dairy creams. However, in summer the emulsion tends to separate. This paper outlines some steps that were taken to modify the HPKO with the intention of increasing the stability without affecting whipping performance. This was achieved by blending HPKO with palm stearin (POs). Interesterification was employed to eliminate the increase in solid fat content at 37°C and 40°C. Results of the experiment showed that an interesterified HPKO: POs 66:34 blend proved to have satisfactory whipping performance when compared to creams made with HPKO alone. 相似文献