西式快餐用煎炸油质量近红外快速检测模型的建立

为对西式快餐用煎炸油质量进行快速监测,选用近红外光谱法（NIRS）联合偏最小二乘法（PLS）,分别建立酸价和极性组分两个煎炸油质量指标的定量模型。结果表明,酸价和极性组分的定标模型校正决定系数（R2）均为0.9974,校正标准差均方根（RMSEC）分别为0.111和0.359,预测标准差均方根（RMSEP）分别为0.171和0.562。盲样验证、精密度及准确度分析结果显示,酸价和极性组分的NIR预测值同真实值的相关方程的相关系数分别为0.9944、0.9761,应用所建模型预测同一煎炸油样品的酸价和极性组分的相对标准偏差（RSD）分别为0.934%和1.278%,表明所建模型对煎炸油样品的酸价和极性组分预测能力较好,且有较好的重现性。因此,基于近红外光谱定量模型,可以对西式快餐用煎炸油质量进行快速、准确地监测。     

地皮菜添加量对鸡胸肉糜凝胶特性的影响

以新鲜鸡胸肉为实验对象,探究地皮菜添加量对鸡胸肉糜蒸煮得率、保水性、色泽、质构、凝胶强度、流变特性和微观结构等的影响.结果表明:随着地皮菜添加量的增加,鸡胸肉糜的蒸煮得率和保水性呈先上升后下降的趋势,添加量在1.2％时最大,分别为95.71％和95.33％;鸡胸肉糜的L*值、a*值、b*值均显著降低(P＜0.05);硬...     

蓬莱葡萄与葡萄酒产区自然条件

葡萄与葡萄酒作为蓬莱的4大支柱产业之一,近年来得到了蓬勃发展。蓬莱之所以成就今日葡萄产业的辉煌,与蓬莱悠久的酿酒葡萄栽培历史和传统有关,与当地政府对行业的高度重视有关,而蓬莱独特的地理环境和优越的自然条件则是成就这一切的基础。1蓬莱自然条件分析1.1地理位置蓬莱市     

薄木贴面工艺中起泡的预防与纠正

分析了薄木贴面工艺中，木皮起泡主要是由于表面不平、胶水固化程度和薄木含水率等原因所致。并对各个阶段出现起泡的具体情况进行分析，给出处理方法．     

天康面粉公司制粉车间局部技改介绍

山东巨野国家粮食储备库天康面粉公司制粉车间始建于2000年,设计能力为处理小麦100t/d.主要设备有FMFQ10×2/6×2磨粉机8台,FS-FG6×24C高方筛3台,FQFD50×2×3清粉机2台,磨辊总接触长度12000 mm,平筛总筛理面积138.8 m2,单位磨辊接触长度12 mm/(100kg·d),单位平筛筛理面积0.14 m2/(100kg·d).麦间清理工艺(包括初清)为4筛2打2去石3磁选2着水,粉间工艺为488M1S2T4P3Br.     

特宽幅织机经向连续性疵点的控制措施

探讨双织轴喷气织机织造特宽幅织物时经向连续性疵点的有效控制措施.将经向连续性疵点分为筘路、左右色差布、磨痕、断经等几类,分析了各类疵点产生的原因,采取了行之有效的工艺技术措施并建立了严格的管理制度.通过采取一系列有效措施,使经向疵点得到了控制,棉布下机一等品率由10%提高到45%,棉布入库一等品率由98%提高到99.8%.     

混浊南瓜汁饮料配方的确定

南瓜有降血糖作用，是治疗糖尿病的食疗良药。以南瓜为主要原料，经磨浆、过滤、调配、均质等处理，采用合理的加工工艺与配方，可以制成有一定保健功能的南瓜汁饮料。     

Pseudomonas palleroni S6X产脂肽生物表面活性剂的分离纯化及特性研究

采用酸沉法提取Pseudomonas palleroni S6X发酵液中的活性成分。通过Sephadex LH-20柱、ODSC18柱和HPLC纯化所得的表面活性剂经TLC鉴定为脂肽类生物表面活性剂。该生物表面活性剂的临界胶束浓度达到28.6mg/L,对热、pH、NaCl具有较强的耐性,对原油有较强的乳化能力,同时具有良好的抗生素活性。     

Effect of level of metabolizable protein on milk production and nitrogen utilization in lactating dairy cows

The objective of this study was to investigate the effects of the level of metabolizable protein (MP) on milk production and nitrogen utilization in Chinese Holstein dairy cows. Forty multiparous dairy cows (body weight = 590 kg; days in milk = 135; average milk yield = 30.2 kg/d) were assigned to treatments randomly within groups based on days in milk and milk production. Animals were offered diets with different levels of MP: 8.3% (diet A), 8.9% (diet B), 9.7% (diet C), and 10.4% (diet D) of dry matter. The MP level in diet A was designed to meet the current Chinese National Station of Animal Production and Health guidelines, whereas that in diet D was based on the National Research Council (2001) model. The experiment lasted for 7 wk. Milk yield and milk composition (fat, protein, and lactose) were recorded, and urea nitrogen concentrations in serum, urine, and milk were measured during the experiment. Milk yield and milk protein percentage increased as the MP increased up to 9.7% of dry matter, and then leveled off. Concentrations of nitrogen in urine, serum, and milk increased linearly as the amount of MP was increased, indicating decreased efficiency of nitrogen utilization. Milk lactose percentage and total solids percentage showed no significant differences among the 4 diets. We concluded that the optimal dietary MP level was at 9.6% of dry matter for Chinese Holstein dairy cows producing 30 kg of milk per day.     

响应面试验优化落叶松中二氢槲皮素纯化工艺

目的：优选落叶松中二氢槲皮素的最佳纯化工艺。方法：在单因素试验的基础上,运用Box-Behnken响应面法设计料液比、结晶温度和结晶时间三因素三水平的试验模型,以二氢槲皮素的纯度作为评价指标,对二氢槲皮素的纯化工艺进行优化。结果：最佳纯化条件为料液比1∶12（g/mL）、结晶温度5 ℃、结晶时间20 h。结论：研究结果可为二氢槲皮素纯化工艺的确定以及工业生产提供科学依据。