二维码技术在家庭智慧健康用油模式中的应用

目前全国大约有80%的家庭食用油的摄入量是超标的,食用油超标可能会导致肥胖、高血压、高血脂、糖尿病、心脏病等慢性疾病的增长。由于个体工作、生活方式等诸多因素的差异,消费者很难真正意义上清楚并把控个人的食用油健康摄取量,而以家庭为模式统计并指导居民健康、合理消费食用油,为我们提供了新的思路和途径。通过建立家庭用油统计新模式,当消费者在购买产品时,通过手机扫描食用油产品瓶盖上企业喷印的二维码,链接企业信息平台,信息平台则实时根据消费者家庭档案、每次购买食用油数量、家庭用油统计模型设定的食用油数值,智慧化生成家庭食用油消费统计图,供消费者实时查看,并监控消费者家庭食用油摄取量,以此倡导消费者合理膳食、健康用油,实现以家庭食用油消费的智慧用油新模式。     

3D printing of open-porous cellular ceramics with high specific strength

We present a novel processing route for manufacturing highly open porous, hierarchically structured ceramics via direct ink writing. We manufactured cellular samples with overall porosities up to 88% that exhibit fully open-porous struts with porosities between 45 and 60% and pore sizes x_50,3 < 6 μm using capillary suspension based inks. An innovative processing strategy enabled manufacturing crack-free, undeformed cellular ceramic samples.We printed hexagonal honeycomb structures that showed exceptionally high specific strength under compression load and significantly enlarged the strength-density range that was covered by sintered capillary suspensions, so far. Without loss of mechanical strength the density of ceramic parts was decreased by about a factor of 2–3. Strength of in-plane and out-of-plane loaded hexagonal honeycomb structures varies according to common scaling laws for cellular structures. The honeycombs are mechanically more efficient than bulk specimens from capillary suspensions, since they show a distinctly lower sensitivity of strength on density.     

黑龙江市售乳制品蛋白质质量评价

为评价黑龙江省市售乳制品中蛋白质的质量,采用凯氏定氮法和三氯乙酸沉淀法测定黑龙江市售不同厂家生产的全脂加糖乳粉、纯酸牛乳、配制型乳饮料和灭菌纯牛乳中的蛋白质和非蛋白氮含量,计算各乳制品的蛋白氮指数和非蛋白氮指数。结果表明, 利用蛋白氮指数和非蛋白氮指数评价乳制品中蛋白质质量是可行的,并建立了4种乳制品的蛋白氮指数和非蛋白氮指数模型。黑龙江市售合格的全脂加糖乳粉、纯酸牛乳、配制型乳饮料和灭菌纯牛乳的蛋白氮指数范围分别为0.990～0.995、0.870～0.956、0.402～0.633和0.929～0.943,其非蛋白氮指数范围分别为0.005～0.010、0.084～0.130、0.367～0.598和0.069～0.071。总体来说,黑龙江市售乳制品蛋白质含量大多数符合国家标准规定,但部分乳制品的蛋白质质量有待提高。     

加料工序的不同工艺条件对烟草香味成分含量变化的影响研究

采用同时蒸馏萃取和气相色谱/质谱联用技术分析了卷烟制丝加料工序中的挥发性、半挥发性香味成分,观察对比了不同条件下香味组分含量的变化,发现：随着回风温度的提高,烟草酸性香味组分含量降低,中性香味组分升高,碱性组分先降低后增加;随着润叶加料滚筒转速的增大,酸性、中性和碱性组分均有不同程度的升高;随着热风风量增大,烟草酸性香味组分降低,中性香味组分先降低后升高,碱性组分先增加后降低.据此结果,对加料工序中的3个工艺参数进行了优化,得出较佳的工艺参数：回风温度58℃,滚筒转速35 r/min,风机频率15 Hz.