Dried jujube classification using support vector machine based on fractal parameters and red,green and blue intensity

A new method that combines fractal theory and red, green and blue (RGB) colour intensity was developed to sort dried jujube fruits by using support vector machine (SVM). Our result shows that the new method is fast and accurate in dried jujube fruits classification. The SVM models based on fractal parameters only achieved 85.18–92.73% total accuracy rate. The total classification accuracy of SVM based on RGB intensity values was 94.44%. However, the SVM models based on combining fractal parameters with RGB intensity values achieved 94.44–98.15% total accuracy rate. The best classification accuracy (98.15%) was found when using SVM model based on combining fractal measures (FM) with RGB intensity values (C = 512, γ = 0.0078125). Therefore, the SVM model based on combining FMs with RGB intensity is recommended in dried jujube fruits classification.     

γ射线和电子束辐照对风味豆干杀菌效果及品质的影响

为探究γ射线和电子束辐照对风味豆干微生物和理化指标影响的差异性，分别采用不同剂量的γ射线（0、3.1、5.9、8.6、11.4 kGy）和电子束（0、2.7、5.5、8.2、10.8 kGy）辐照风味豆干，研究其对风味豆干中微生物存活数、营养成分、理化指标及质构特性的影响。结果表明，γ射线和电子束辐照均能有效控制风味豆干菌落总数、霉菌及大肠菌群数，γ射线辐照杂菌和霉菌的D₁₀值分别为1.82 kGy和1.72 kGy，电子束辐照的D₁₀值分别为2.44 kGy和1.79 kGy，γ射线对风味豆干的杀菌效果强于电子束。两种辐照方式对风味豆干水分、蛋白和灰分的含量没有明显影响，但辐照后脂肪含量均显著降低。γ射线辐照后风味豆干氨基酸的含量无明显变化，但5.5 kGy剂量条件下，电子束辐照会对缬氨酸、苯丙氨酸、脯氨酸、甘氨酸、丙氨酸、酪氨酸等6种氨基酸的含量产生显著影响。γ射线辐照对风味豆干过氧化值有显著的影响，与酸价无明显的相关性；而电子束辐照与风味豆干过氧化值没有明显的相关性，但会引起其酸价显著上升。γ射线辐照不会对风味豆干硬度、内聚性、胶着性、咀嚼性和弹性产生显著影响，电子束辐照对其硬度、内聚性和胶着性的影响不显著，但5.5 kGy以上剂量辐照会对其咀嚼性和弹性产生显著的影响。综上所述，γ射线和电子束对风味豆干的辐照效应在某些方面存在一定的差异性，但均具有在豆干加工中应用的潜力，研究结果可为γ射线和电子束辐照技术在豆干加工中的应用提供理论依据。     

不同干燥方法对茉莉花品质影响分析

根据茉莉花的生物学特性，通过试验研究了吸香或未吸香茉莉花浸膏的芳香组分，并对比研究茉莉花花蕾、吸香鲜花及未吸香鲜花经自然干燥、烘箱干燥、微波干燥、真空干燥或真空冷冻干燥后的干花品质，为茉莉花干花产业化提供了有价值的数据。     

我国杂粮挂面标准探讨

近年来,随着我国经济社会的发展,挂面产业与消费的转型升级需求日益增强,有健康促进作用的各种杂粮挂面受到越来越多的关注。然而,我国挂面标准的发展却滞后于市场发展要求,尚无针对于杂粮挂面的行业标准,杂粮挂面的标准问题已经成为产业发展与创新的重要瓶颈。在分析我国挂面标准现状与问题的基础上,分析借鉴日本挂面标准的现状,对我国杂粮挂面标准制定的难点与发展方向进行了探讨。     

风味黄瓜鱼肉干系列产品研制

将浆鲜鱼肉切成条状作为主料，在其中分别加入不同的辅料，运用新工艺可以生产出风味各异的五香型、麻辣型、咖喱型、香辣型黄瓜鱼肉干系列产品。     

Suitability of some selected maize hybrids from Serbia for the production of bioethanol and dried distillers' grains with solubles

BACKGROUND: Bioethanol is mostly produced from starchy parts of the corn grain kernel leaving significant amounts of valuable by‐products such as dried distillers' grains with solubles (DDGS) which can be used as a substitute for traditional feedstuff. The suitability of six maize hybrids from Serbia was investigated for bioethanol and DDGS production. The correlation between physical and chemical characteristics of the grain, bioethanol yield and quality of the corresponding DDGS was assessed. RESULTS: All hybrids had very different chemical composition and physical characteristics which could allow various applications. The highest bioethanol yield (94.5% of theoretical) and volumetric productivity (2.01 g l^?1 h^?1) were obtained with hybrid ZP 434 and the lowest with ZP 611k. Regarding chemical composition, all DDGS samples manifested good properties as feed components. Their protein content was higher compared to the kernel. In addition, the samples showed high digestibility and high mineral content, especially of calcium and phosphorus. CONCLUSION: A hybrid ZP 434 was selected as the most promising bioethanol producer. This property is attributed to the highest level of soft endosperm which is more susceptible to starch‐hydrolysing enzymes. A high yield potential per hectare makes it the best candidate for commercial bioethanol production. © 2012 Society of Chemical Industry     

冷库稻壳热绝缘层热湿状态研究

本文对冷库稻壳热绝缘层的热湿特性进行了分析。提出用空气层解决冷库工程中热绝缘材料受潮的方法,通过工程实践和热工测试分析,证实了在冷库阁楼稻壳层表面形成自防潮壁垒理论;0℃附近的干燥带的存在。使得对冷库热绝缘层的热湿迁移现象的物理本质有了新的认识,对冷库热绝缘层保持干燥的设计方法起重要的指导作用。