霸王花(火龙果花)干制工艺的研究

主要研究了霸王花的干制工艺。研究了预处理对产品品质的影响，对不同温度条件下的热风干燥和微波干燥效果进行了比较，得到了较为合理的干制工艺条件：原料用100qC水蒸气处理0．5min；采用变温干燥方式：60℃（0．5h）-70℃（1．0h）-55℃（0-2．0h）或者微波干燥方式：装载量0．25Kg，微波强度700W，时间11．6min，可以获得复水性好、Vc保存率高、感官品质优良的霸王花干制品。     

火龙果茎的生物活性成分及其开发应用前景

综述了火龙果茎的活性成分及各种活性成分的应用现状，同时还介绍了火龙果茎的开发应用前景。     

大孔树脂吸附纯化火龙果茎黄酮类化合物的研究

以紫外分光光度法为检测手段,采用静态吸附分离法优选分离火龙果茎中黄酮类化合物的大孔树脂;并用动态吸附分离法对分离条件进行研究.结果表明D101大孔树脂对火龙果茎总黄酮有良好的吸附解吸分离性能,其动态分离纯化条件为:火龙果茎中总黄酮的上样液浓度为820mg/L,最大上样量为75mL(4倍湿树脂体积).吸附速度为2.0mL/min,用70%乙醇以2.0mL/min的速度洗脱,洗脱率可达99.21%,经纯化后的产物中总黄酮纯度为70.61%,为纯化前的5.11倍.     

发酵型营养米粉的研制

对以糯米为原料，用微生物发酵方法制作制作 发酵型营养米粉的工艺条件作了选择，并对成品的营养成分进行了分析检测。     

罗伦隐球酵母冻干粉在贮藏期的活性及安全性研究

罗伦隐球酵母对许多水果的采后病害具有显著的抑制作用。要想将拮抗酵母商品化，应用于水果的采后病害防治，需要得到酵母菌体干粉制剂。另外，拮抗菌的安全性是其作为水果防腐保鲜剂的前提。研究了罗伦隐球酵母冻干粉在贮藏期的活性，并对其安全性进行了急性毒理实验评价。结果表明，罗伦隐球酵母冻干粉在4℃下保存的前5个月，其活性保存较好，但第6个月，其活性失去加快。罗伦隐球酵母冻干粉制剂经小鼠急性经口毒性实验，结果证实属于实际无毒类。     

粮食干燥工艺与设备中存在的问题及对策

对粮食干燥工艺及设备进行了分析，认为其问题为：中小型干燥设备缺短、干燥工艺不合理、干燥质量差、能耗较高。对此，应采取的对策为：发展中小型干燥设备、探索干燥新工艺、采用干燥新能源。     

草莓粉非酶褐变的抑制及抗结块性研究

对草莓粉非酶褐变的抑制及抗结块性进行了研究,结果表明：添加适量的亚硫酸氢钠、采用内置干燥剂的阻湿阻氧好的保鲜袋包装、在低温低湿条件下贮藏,对草莓粉非酶褐变具有很好的抑制作用;添加硬脂酸镁1.0%、微晶纤维素0.5%、硅胶0.5%,对草莓粉具有很好的抗结块作用.     

EFFECT OF COMBINATION DRYING ON THE PHYSICO-CHEMICAL CHARACTERISTICS OF CARROT AND PUMPKIN

The quality of dehydrated carrot and pumpkin pieces produced by combination drying employing partial freeze-drying and hot air-drying were investigated. The drying rate, the total energy requirement and the physico-chemical properties of the combination dried (CD) products were compared with those of hot air-dried (HAD) and freeze-dried (FD) products. The total carotenoid content of the two vegetables (1050 ppm and 160 ppm) was significantly affected by drying processes. Destruction of carotenoids during storage at different temperatures was less in the CD samples. The HAD vegetables exhibited shrinkage, case hardening and poor rehydration (25 and 28 min in cold water, rehydration ratio 1:2.6 and 1:2.9, respectively). The FD vegetables appeared wholesome, porous, well formed with excellent rehydration features at room temperature (rehydration time 2 and 3 min in cold water, rehydration ratio 1:7 and 1:6.9, respectively). The CD vegetables were comparatively superior to HAD products and were nearer in quality to FD products with respect to appearance, rehydration (9 and 10 min in cold water, rehydration ratio 1:5 and 1:4, respectively). The drying time and total energy for CD processing was 50% less than for FD but similar to HAD. The combination dehydration process is effective in obtaining high quality dehydrated vegetables.     

CONVECTIVE DRYING OF PUMPKIN: INFLUENCE OF PRETREATMENT AND DRYING TEMPERATURE

The aim of this research was to study the influence of blanching as a pretreatment on the drying rate, color and rehydration rate of pumpkin slices ( Cucurbita maxima ) dried in a convective dryer at 50, 60 and 70C.
The different pretreatments did not modify drying time. The diffusion coefficient depended on temperature and moisture content, but not on pretreatments. It varied between 1.6 and 2.9  ×  10⁻⁹ m²/s and activation energy was approximately 35.6 kJ/mol. The rehydration rate of the dried sample, which was found to be influenced by drying temperature but not by the pretreatments, reached about 2 kg water/kg dry solid in about 150 s in boiling water. Color parameters " L " and " b " were influenced by drying temperature and pretreatments. Parameter L varied between 36 and 53 and parameter b varied between 20 and 31. Samples dried at 70C without pretreatments presented color parameter values very similar to those of the fresh sample.

PRACTICAL APPLICATIONS

This work evaluates the pretreatment and drying conditions of pumpkin. Five parameters of the optimal product are considered: pretreatment time, drying time, temperature, color and rehydration rate of the product. With these results, drying of pumpkin can be carried out in industrial convective dryers and the dried product may be used in the preparation of soups, premixed foods, snacks, etc.     

强化DHA、牛磺酸的营养蛋白粉对发育期小鼠学习记忆能力的影响作用

探讨强化DHA和牛磺酸的营养蛋白粉对发育期小鼠学习记忆能力的影响作用.50只初断乳小鼠随机分为5组:酪蛋白对照组(G1),未强化DHA和牛磺酸的营养蛋白粉组(G2),低剂量组(G3),中剂量组(G4),高剂量组(G5).喂养30 d后,Morris水迷宫和小鼠跳台实验测定小鼠的学习记忆能力,并测定脑组织蛋白质含量、乙酰胆碱酯酶(TChE)和超氧化物歧化酶(SOD)活性及丙二醛(MDA)含量.Morris水迷宫实验显示:不同剂量强化组动物的逃避潜伏期缩短,在目标象限的游泳时间和路程显著增加,穿越目标次数也增多.小鼠跳台实验结果显示:不同剂量强化组动物的错误次数减少,触电潜伏期增加.脑组织蛋白质含量和SOD的活性显著增加,MDA含量和TChE活性变化没有显著性差异.结论:强化DHA和牛磺酸的营养蛋白粉对发育期小鼠的学习记忆能力有促进作用.     

OPTIMIZATION OF SPRAY DRYING CONDITIONS FOR PRODUCTION OF BIFIDUS MILK POWDER FROM COW MILK

Bifidus milk powder was prepared by supplementing cow's milk with predetermined level of additives to obtain slurry of desired concentration. The slurry was sterilized, cooled and inoculated with 24‐h‐old bulk culture of Bifidobacterium bifidum at 10% and incubated at 37C for 24 h, cooled and dried in SM Scientech Lab model spray dryer with predetermined spray drying conditions. The bifidus milk powder contains bifidobacteria counts from 1.88 × 10⁹ to 15.80 × 10⁹ cells/g dry weight and their percent survival was 4.17–35.11%. Maximum survival was obtained by using the following spray drying conditions: inlet temperature of 164.02C, slurry concentration of 25.62% total soluble solids and air pressure of 2.5 kg/cm². The high temperature and air pressure of spray drying markedly influenced the color and appearance of final product. The inlet temperature and air pressure showed a significant effect on survival of bifidobacteria in the final product.     

膜浓缩技术与真空冷冻干燥在茶饮料中的应用

膜浓缩与真空冷冻干燥应用于茶饮料工业中，与传统工艺方法比较，解决了茶饮料中冷后浑，混浊等缺陷。     

苋荞速食粉的延缓衰老作用

论述了将苋荞速食粉与常规基础饲料以1:4混合,饲喂12月龄BALB/C纯种小鼠60d,测定得出:苋荞速食粉可以使血清及肝脏中过氧化脂质LPO分别下降16.1%和13.1%(P<0.01),显著升高红细胞及肝中超氧化物歧化酶(SOD)比活性15.1%和13.0%(P<0.01或P<0.05),提高全血谷胱甘肽酶(GSH-Px)活性77.7%,血过氧化氢酶(CAT)比活性188.2%(P<0.001),提高皮肤羟脯氨酸含量20.4%(P<0.01),同时可降低心肌脂褐素的含量达33.1%(P<0.01),抑制脑中单胺氧化酶(MAO-B)活性29.6%(P<0.001),对肝内MAO-B活性无影响,结果说明苋荞速食粉能提高机体抗氧化酶活性,抑制脂质过氧化反应,延缓衰老,是有待充分认识和广泛利用的保健食品。