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环境友好型SBS胶粘剂的研究_食品科学与工程论文范文
食品科学与工程论文范文 目录 中文摘要 ……………………………………………………………………………Ⅰ 外文摘要 ……………………………………………………………………………Ⅱ 目录………………………………………………………………………………Ⅲ 1 绪论 ………………………………………………………………………………1 1.1前言…………………………………………………………………………1 1.2胶粘剂的环保问题…………………………………………………………1 1.3 SBS胶粘剂的概述…………………………………………………………2 1.4主要研究内容………………………………………………………………3 1.5研究的目的与意义…………………………………………………………3 2 实验部分 …………………………………………………………………………5 2.1 仪器与材料………………………………………………………………5 2.2 实验方法…………………………………………………………………5 3 结果和讨论………………………………………………………………………7 3.1 溶剂的选择………………………………………………………………7 3.2 SBS弹性体的牌号的选择对胶粘剂性能的影响………………………9 3.3 增粘树脂、增强树脂的选取及加入量对胶粘剂性能的影响…………10 4 总结与展望………………………………………………………………………13 4.1 实验总结…………………………………………………………………13 4.2 SBS胶粘剂的改性研究……………………………………………………13 4.3 展望我国SBS胶粘剂的发展方向………………………………………14 致谢…………………………………………………………………………………15 参考文献……………………………………………………………………………16 摘要：SBS热塑性弹性体是苯乙烯一丁二烯一苯乙烯三嵌段共聚物。SBS用于胶粘剂，兼具良好的弹性和粘接强度、耐低温、溶解性好、溶液粘度低、固化快等优点，可制成通用型、压敏型、层压型、接触型等几乎所有类型的胶粘剂。本文中主要讨论了环境友好型SBS胶粘剂所需溶剂的选择原则及不同比例溶剂对SBS胶粘剂，研究了增粘树脂、增强树脂对胶粘剂性能的影响。其中环保性能主要从溶剂着手，选取无毒、无挥发性有害气体的溶剂制备环保型SBS胶粘剂；并研究在该溶剂条件下，增粘树脂、增强树脂及SBS弹性体的适宜填加量及在该填加量下胶体的综合性能。通过对比的方法选择综合性能较好的各个助剂的具体配比。 Abstract: SBS thermoplastic elastomer is styrene-butadiene-styrene triblock copolymer. So SBS is used as rubber adhesive, it has strong elasticity and bonding strength, low temperature resistance、good in solubility、 low in solution viscosity、 quick in solidification and so on. And it can be made into rubber adhesive in almost every types , such as the ordinary type、pressure-sensitive type、laminated type、 contact type and so on. This article primary discuss the necessary solvent’s selection principles of environmental-friendly type SBS rubber and the different impacts on different solvent’s proportional, it also has done some researches on the impacts that tie resin and reinforced resin have brought toward rubber adhesive ‘s performance. Which environmental performance mainly from the start solvent selected non-toxic, non-volatile solvents harmful gases Preparation environmentally-friendly adhesive SBS. And the study of solvent conditions, tackifying resin, reinforced resin 、SBS reinforced elastomer and the appropriate amount of filling and fill in the amount of colloid under the comprehensive performance. By comparing the method to choose the best performance of the various additives specific ratio. 关键词：环境友好型 SBS胶粘剂 增粘树脂 增强树脂 Key words: environmental-friendly type SBS rubber adhesive tie resin reinforced resin
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AD万年青软罐头加工技术研究_食品科学与工程论文范文
食品科学与工程论文范文 目 录 中文摘要....................................................................I 英文摘要...................................................................II 目录......................................................................III 1. 绪论.....................................................................1 1.1 海藻糖的理化性质...................................................1 1.2影响叶绿素稳定的因素...............................................2 1.3 软罐头的优缺点.....................................................2 1.4 胀罐...............................................................3 1.5 本章小结...........................................................4 2. 实验部分.................................................................5 2.1 工艺流程...........................................................5 2.2 实验仪器及试剂.....................................................5 2.3 护色处理对叶绿素的影响.............................................5 2.4 AD万年青软罐头杀菌条件的研究.......................................7 2.5 可溶性固形物含量检测...............................................8 2.6 微生物检测.........................................................8 2.7 感官评定...........................................................8 2.8 本章小结...........................................................8 3. 结果与讨论...............................................................9 3.1 不同浓度的护色剂对护色的影响.......................................9 3.2 不同的浸泡时间对护色的影响........................................10 3.3 不同的杀菌温度对品质的影响........................................11 3.4 不同的杀菌时间对品质的影响........................................13 3.5 可溶性固形物含量检测..............................................14 3.6 微生物检测........................................................17 3.7 感官评定..........................................................18 3.8 本章小结..........................................................20 4. 总结与展望..............................................................21 致谢.......................................................................22 参考文献...................................................................23 摘要：本文为了得到AD万年青软罐头的加工工艺条件而开展该项研究，其中工艺要点为护色剂的选择与用量及杀菌的时间与温度的确定，同时对其成品进行感官、可溶性固形物及微生物检测。本次研究所采用的护色剂为一种新型的食品添加剂——海藻糖，对它的单一护色及复合护色（与ZnCl2）做了一些研究；由于本次的实验原料是AD万年青，因此杀菌工艺选择了低温长时杀菌；叶绿素的提取方法为95%乙醇：80%丙酮＝1：1混合液浸提24h，过滤后使用紫外可见分光光度计测量吸光度。实验结果表明：海藻糖与氯化锌混合时会产生白色絮状沉淀，通过对叶绿素含量的测定，复合护色效果并不理想；同时，我们发现护色剂及杀菌条件的不同对此次研究成品可溶性固形物含量的影响不大。通过各方面的比较总结，最终得到的最佳护色及杀菌工艺条件是：1.5%的海藻糖浸泡1h护色，70℃、30min杀菌。 Abstract：This laboratory study was initiated in order to get the conditions of process and technics of AD Rohdea japonica Roth retort pouch, one of the main points in the technics is to determine the selection and the concentration of the colour fixatives, the other one is the determination of the temperature and the time of sterilization, finally, do the tests of the senses, soluble solids and microbiological examination. A novel food additive-- trehalose is used, as a colour fixative, the research will tell us which is better-- work alone or as a complex (with ZnCl2). Because of the material is AD Rohdea japonica Roth, so in this experiment, I choose LTLT sterilization. The extraction of chlorophyll is extracting in the mixture that mixed up by 95% of ethanol and 80% of acetone(1:1), measure the absorbances after 24 hour by UV-VIS spectrophotometer. The results showed that when trehalose is compounded with ZnCl2, white floc precipitation will be generated, and content of chlorophyll also show us that the complex isn’t a good choose; meanwhile, we find that the changing of the colour fixative’s or sterlization’s condition work little on the results of soluble solids. After comparison and sum-up, we get the best conditions of colour-pretected and sterilization eventually: dip in 1.5% trehalose solution for 1 hour, sterilizate in the temperature of 70℃ for 30 minutes. 关键词：海藻糖护色；杀菌时间；杀菌温度；可溶性固形物含量；微生物检测 Keywords：The fixation of colour by trehalose, the time of sterilization, the temperature of sterilization, soluble solids, microbiological examination
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HACCP在婴儿配方奶粉中的应用_食品科学与工程论文范文
食品科学与工程论文范文 目 录 中文摘要I 英文摘要II 目录III 1. 绪论1 1.1 HACCP的概述及原理1 1.2 HACCP计划的实施过程及特点2 1.3婴儿配方奶粉3 2. 婴儿配方奶粉的工艺流程5 2.1产品描述 5 2.2 工艺流程图5 工艺说明及危害分析6 3.1原辅料验收6 3.2冷却净乳7 3.3贮存7 3.4预处理7 3.5预热8 3.6配料8 3.7均质8 3.8杀菌8 3.9浓缩9 3.10喷雾干燥9 3.11混合9 3.12金属检测9 3.13空罐灭菌10 3.14充氮罐装10 3.15封合、成型10 3.16入库、检验10 3.17运输、销售10 关键控制点的确立并建立计划表12 4.1确定每个关键控制点的关键限值12 4.2确定每个关键控制点的监控系统12 4.3建立纠偏措施14 4.4建立记录保存系统14 4.5建立验证程序14 对HACCP体系的验证报告16 结论16 致谢18 参考文献19 摘 要：本文首先介绍了HACCP体系和婴儿配方奶粉，并建立婴儿配方奶粉的工艺流程，通过生产线上的实际考察和学习，在对婴儿配方奶粉生产过程中各个流程过程进行生物性、化学性、物理性三个方面认真仔细的危害分析后，确定了原料验收、杀菌、金属检测、空罐灭菌和封合成型五个关键控制点。 通过分析这些关键控制点，建立操作限值和关键限值、CCP监控程序（对象、方法、频率、人员）、相关纠偏措施、有效的记录保持程序及验证程序，最后对此进行验证报告记录。婴儿配方奶粉生产过程中HACCP体系的建立可以有效的控制了婴儿配方奶粉生产过程中出现的一系列影响产品质量的危害点及产品质量事故的发生，保证了奶粉的品质，提高了企业的经济效益，使企业处于良性循环，在竞争中处于有利地位。 关键词：HACCP；婴儿配方奶粉；危害分析；关键控制点 Abstract: This paper introduce the sysetm of HACCP and infant formulas, establish the technological process infant formulas,through the production line of the practical investigation and study.with the analysis of the production of infant formulas on three aspects of biology,chemistry and physics, and with the research of relevent materials, the paper determine six important control points, including check and accept of raw materials, disinfection, spray drying, metal detection, sterilization of empty tin and seal moulding. With the analysis of these key control points, the paper try to build key restriction, CCP control process(objtects, mehods, frequency, staff), measurs of related deviation, effective record process, process of confirmation, and have related proving report. The establishment of HACCP system for the production of Infant formulas can control the damages and accidents of production, which can assure the quality of formula.Therefore the company can increase the economic benefit in positive cycle and than set up beneficial position in competition. Keywords：HACCP; infant milk formula; hazard analysis; critical control points
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粗毛栓菌漆酶的初步分离与纯化_食品科学与工程论文范文
食品科学与工程论文范文 目 录 摘要……………………………………………………………………………………………1 关键词…………………………………………………………………………………………1 Abstract………………………………………………………………………………………1 Key words……………………………………………………………………………………1 引言………………………………………………………………………………1 1材料与方法………………………………………………………………………………2 1.1材料 ……………………………………………………………………………………2 1.1.1菌种……………………………………………………………………………………2 1.1.2主要仪器………………………………………………………………………………2 1.1.3主要试剂………………………………………………………………………………2 1.1.4 PDA培养基……………………………………………………………………………2 1.1.5高产漆酶液体培养基 ………………………………………………………………2 1.2方法 …………………………………………………………………………………2 1.2.1粗酶的制作…………………………………………………………………2 1.2.2 粗酶的超虑浓缩…………………………………………………………………3 1.2.3 硫酸铵盐析…………………………………………………………………………3 1.2.4透析……………………………………………………………………………………3 1.2.5 离子交换柱层析………………………………………………………………………3 1.2.6 酶活力的测定…………………………………………………………………………3 1.2.7蛋白含量的测定………………………………………………………………………3 2 分析和讨论…………………………………………………………………………………3 2.1漆酶的诱导………………………………………………………………………3 2.2 离子交换层析对漆酶的分离与纯化……………………………………………………3 2.2.1表1.洗脱组分漆酶活力测定结果…………………………………………………4 2.2.2 图1.粗毛栓菌漆酶的Q-Sepharose柱层析洗脱曲线……………………………4 2.3 蛋白质含量标准曲线…………………………………………………………………………4 2.3.1 表2.牛血清蛋白浓度与光密度值的关系…………………………………………4 2.3.2 图2.蛋白质含量标准曲线…………………………………………………………4 2.4 表3.粗毛栓菌漆酶的柱层析纯化结果 ………………………………………………5 参考文献………………………………………………………………………………………5 致谢……………………………………………………………………………………………6 粗毛栓菌漆酶的初步分离与纯化 摘要 将粗毛栓菌接种在含有麦草粉的培养基中培养25d，浸提得粗酶液，尔后经超滤浓缩、盐析和透析，将透析液上样于Q-Sepharose F. F.层析柱，获得具有漆酶活性的组分。 关键词 粗毛栓菌，漆酶，离子交换层析 Seperation and Purification of Laccases in Trametes gallica Fr. Abstract Trametes gallica Fr. was cultivated in wheat straw powder for 25 days. The crude enzyme was ultrafiltrated, salted out, dialyzed and applied to Q-Sepharose FF ion exchage column. The effluent with laccase acticity was obtained. Key words Trametes gallica, laccase, ion exchage chromatography
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葡萄糖苷的提取及抗氧化活性的研究_食品科学与工程论文
食品科学与工程论文范文 目 录 中文摘要…………………………………………………………………………… Ⅰ 英文摘要…………………………………………………………………………… Ⅱ 目录………………………………………………………………………………… Ⅲ 1. 绪论……………………………………………………………………………… 1 1.1 背景…………………………………………………………………… 1 1.2 花色苷………………………………………………………………… 1 1.3 花色苷的基本性质…………………………………………………… 2 1.4花色苷的功能作用……………………………………………………… 2 1.5 花色苷的研究进展………………………………………………………2 1.6 葡萄花色苷的提取………………………………………………………3 1.7 葡萄花色苷的提取………………………………………………………4 1.8 葡萄花色苷的抗氧化能力研究…………………………………………4 2. 实验部分………………………………………………………………………… 5 2.1 实验材料………………………………………………………………… 5 2.2 实验方法………………………………………………………………… 5 结果与分析…………………………………………………………………… 10 3.1 单实验因素结果…………………………………………………………10 3.2 正交试验结果…………………………………………………………… 13 3.3 葡萄糖苷的抗养活活性实验结果…………………………………… …13 4. 总结与展望 …………………………………………………………………… 16 4.1 总结 …………………………………………………………………… 16 4.2 展望 …………………………………………………………………… 16 致谢………………………………………………………………………………… 17 参考文献…………………………………………………………………………… 18 摘要：葡萄糖苷具有良好的功效，价格便宜，来源广，是一种较为理想的天然着色剂。本论文中用不同浓度的乙醇浓度进行超声波萃取，用吸光度来评价萃取含量的多少。在提取过程中的单实验因素中，通过改变乙醇的浓度、萃取的温度、萃取的时间以及萃取的料液比评定萃取效果，通过正交试验验证得出最佳组合。通过实验得出最佳的提取条件为：80%乙醇---HCl、R=1:12、T=50℃、t=40min。用邻苯三酚溶液、Fenton试剂、DPPH来测定葡萄糖苷的抗氧化能力。通过改变样品的浓度来得出清除率，由实验结果得出：邻苯三酚清除OH自由基的清除率为55%以上，Fenton试剂清除O2-自由基的能力的清除率为70%以上；DPPH清除自由基的清除率为70%以上。 关键词：葡萄糖苷 提取 邻苯三酚 Fenton DPPH Abstract：Glucoside has a good effect, cheap sources is broad, is an ideal natural coloring agent.In this paper, using different concentrations of ethanol concentration of ultrasonic extraction, extraction with absorbance to eva luate the amount of content.In the extraction process in a single experiment factors, by changing the ethanol concentration, extraction temperature, extraction time and extraction of the solid-liquid ratio assessment of extraction efficiency, obtained through the best combination of orthogonal test verification.Through experiments that the optimal extraction conditions were: 80% ethanol --- HCl, R = 1:12, T = 50 ℃, t = 40min.With pyrogallol solution, Fenton reagent, DPPH to measure the antioxidant capacity of grape glucosides.By changing the concentration of the sample to derive clearance rate, removal efficiency obtained by the experimental results have been more than 50%. Keywords：Glucoside Purification Pyrogallol Fenton DPPH
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粗毛栓菌漆酶cDNA的PCR扩增_食品科学与工程论文范文
食品科学与工程论文范文 目 录 摘要……………………………………………………………………………………………1 关键词…………………………………………………………………………………………1 Abstract………………………………………………………………………………………1 Key words…………………………………………………………………………………1 引言……………………………………………………………………………………………1 1 材料与方法………………………………………………………………………………2 1.1 主要仪器与试剂用品 …………………………………………………………………2 1.1.1主要仪器……………………………………………………………2 1.1.2主要试剂……………………………………………………………2 1.1.3主要用品……………………………………………………………2 1.2 菌株及培养方式………………………………………………………………………2 1.2.1菌株………………………………………………………………2 1.2.2培养基………………………………………………………………3 1.3 PCR引物………………………………………………………………………………3 1.4 总RNA的提取与检测…………………………………………………………………3 1.4.1 总RNA的提取………………………………………………………………………3 1.4.2 总RNA的甲醛变性琼脂糖凝胶电泳………………………………………………4 1.4.3 总RNA纯度与浓度的检测…………………………………………………………4 1.5 RT-PCR…………………………………………………………………………4 1.5.1 逆转录………………………………………………………………………………4 1.5.2 总 cDNA的PCR扩增……………………………………………………………4 1.5.3 PCR扩增产物的琼脂糖凝胶电泳…………………………………………………5 2 结果与讨论……………………………………………………………………………… 5 2.1 总RNA电泳结果………………………………………………………………………5 2.2 总RNA纯度与浓度……………………………………………………………………5 2.3 PCR扩增结果……………………………………………………………………………6 参考文献………………………………………………………………………………………6 致谢……………………………………………………………………………………………7 粗毛栓菌漆酶cDNA的PCR扩增 摘要 本实验以粗毛栓菌作为出发菌，进行了漆酶cDNA的PCR扩增。以半纤维素为碳源，用高碳低氮培养基, 培养10d，收集菌丝体，提取总RNA，做RT-PCR。结果显示通过RT-PCR有两条cDNA片段被扩增出来。 关键词 粗毛栓菌，漆酶cDNA，RT-PCR扩增 PCR Amplification of Laccase cDNA in Trametesec gallica Abstract Total RNA was extracted from Trametes gallica cultivated for 10 days in high C -low N medium. The result showed that two cDNA fragments was amplified by RT-PCR. Key words Trametes gallica Fr., laccase cDNA, RT-PCR
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山核桃复合抗氧化光亮保鲜剂的研究与应用_食品科学与工程论文
食品科学与工程论文范文 目录 1 绪论1 1.1研究背景和意义1 1.2 研究的主要内容4 2. 实验部分5 2.1 抗氧化光亮保鲜剂的配方研究5 2.2 酸价的测定7 2.3 过氧化值的测定9 3 结果与讨论11 3.1感官指标11 3.2 涂膜工艺的确定12 3.3 结果与讨论16 致谢17 参考资料17 摘要: 本论文以普通山核桃为研究对象，主要论述新型高分子复合抗氧化光亮保鲜剂的合成以及通过对涂膜核桃坚果在储藏过程中酸价、过氧化值感官评价等方面的分析，研究涂膜对核桃哈败变质的抑制效果，以便延长其保质期。对核桃进行涂膜，研究发现，核桃坚果在储藏过程中，采用抽真空的新型高分子复合抗氧化光亮保鲜剂涂膜，可以在一定程度上抑制核桃坚果的哈败。 在新型高分子复合抗氧化光亮保鲜剂的复合配方研究方面，本实验主要采用速溶淀粉、天然茶叶提取物茶红素、抗氧化增效剂Vc和柠檬酸为主要研究原料。研究做为核桃坚果的抗氧化光亮保鲜剂的最佳配比以及其试用方法。通过实验得到，涂膜对核桃坚果的最佳配方为：速溶淀粉5％+Vc0.015％+柠檬酸0.02%+茶红素0.005％。 关键词：抗氧化； 核桃；涂膜； 抽真空； Abstract: This article is focuses on new antioxidant polymer composites Synthesis fresh light on the film, as well as walnut nuts in storage during the acid value, peroxide value of sensory eva luation analysis, research film Walnut Kazakhstan on the inhibitory effect of metamorphic failure in order to prolong their shelf life. These study ordinary about pecan. For coating of walnut, the study found that in the storage of walnut nuts, the use of a new type of vacuum antioxidant polymer composite light preservative coating, can be inhibited to some extent, the Kazakh defeated Walnut nuts. Polymer composites in new antioxidant compound light preservative formulations research, this study mainly instant starch at how to natural tea extracts thearubigins, antioxidant synergist Vc and citric acid as the main raw materials research. Research as a walnut nuts bright antioxidant preservative, as well as the best ratio of its way to trial. Through experiments, coating of walnut nuts for the best formula: instant starch 5% + Vc0.015% + citric acid 0.02% + 0.005% thearubigins. Key Words: ant oxidation；walnut；coating ； vacuumize and film coating
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紫莳药中花青素的提取_食品科学与工程论文范文
食品科学与工程论文范文 目 录 中文摘要Ⅰ 英文摘要Ⅱ 目录III 1.绪论1 1.1研究的背景1 1.2研究的意义2 1.3花青素的简介3 1.4实验方案6 2.实验部分7 2.1实验原理7 2.2实验试剂和材料7 2.3实验仪器和设备7 2.4实验步骤8 3.结果与讨论10 3.1标准曲线10 3.2单因素实验结果与讨论10 3.3正交实验结果与讨论13 3.4实验结论15 4.总结与展望16 致谢17 参考文献18 摘要：花青素拥有高效的抗衰老、抗心血管疾病、抗癌功能，还具有抗辐射、抗疲劳，改善记忆力等作用，尤其在清除体内有害自由基方面显示出了无比优越的生物活性和安全性。但人体自身无法合成花青素，需从外界摄入，因此研究如何高效提取高纯度花青素是有意义和应用前景的。 本文对采用溶剂萃取法萃取紫莳药中的花青素进行了研究，着重考察了浸提剂浓度、萃取时间、萃取温度及料液比等因素对花青素得率的影响。在单因素实验基础上进行正交实验，通过直观分析和方差分析确立了萃取花青素工艺的初步优化工艺条件：提取剂用体积分数为60%的乙醇溶液,料液比1:3,浸提温度60℃,浸提时间13h。在该优化条件下提取，花青素的得率为3.90%。 关键词：紫莳药；花青素；溶剂萃取；正交设计 Abstract：Anthocyanins have effective anti-aging, anti-cardiovascular, anti-cancer functions, and also play a role in anti-radiation, anti-fatigue and improving memory, especially in the respect of clearing harmful free radical of the body. They have showed extremely superior bioactivity and safety. However, our bodies can’t produceany anthocyanins, we should only take them from food or other supplements. It has been reported that extraction and preparation of high purity anthocyanins has wide application prospects. This work studied the extraction of anthocyanins from dioscorea batata decne. The effects of solvent concentration, ratio of sample to solvent, extraction temperature and extraction time on the yield of anthocyanins were studied. Based on the data of single-factor experiment, the optimum conditions were eva luated further applying the orthogonal testing method with intuitive analysis and variance analysis. The preliminary majorized extraction conditions are as follows: extraction solvent of 60% (volume fraction) alcohol solution, ratio of sample to solvent 1:12 (g/mL), extraction temperature 60 ℃, extraction time 13 h. Under these conditions, the yield of anthocyanins is 3.90%. Keywords: Dioscorea Batata Decne；Anthocyanins；Solvent Exhaustion；Orthogonal Design
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小波变换分光光度法同时测定感冒液成分的研究_食品科学与工程论文
食品科学与工程论文范文 目 录 中文摘要........................................................Ⅰ 英文摘要 ......................................................II 目 录 .......................................................III 1.绪论 .........................................................1 2.多组分同时测定的原理及实验方法 ...............................3 2.1计算分光光度法测定多组分的原理 .........................3 2.2实验方法与技术...........................................3 2.2.1吸收系数矩阵ε的求解................................3 2.2.2混合标准溶液的配制 .................................4 2.2.3检测波长位置的选择..................................4 3.小波变换基本原理...............................................6 4.实验部分 .....................................................8 4.1仪器和主要试剂 .........................................8 4.2吸收曲线测定.............................................8 4.3样品稳定性试验 .........................................8 4.4训练样本吸光度测定.......................................8 4.5方法适用性试验...........................................8 4.6样品加标回收试验.........................................8 4.7未知样品吸光度测定 .....................................8 5.结果与讨论.....................................................9 5.1吸收曲线与测定波长的选择.................................9 5.2样品稳定性分析...........................................9 5.3训练样本的确定 ..........................................10 5.4主成分数的确定 ..........................................12 5.5小波系数的确定 ..........................................12 5.6方法适用性试验 ..........................................13 5.7加标回收试验 ...........................................15 5.8未知样品预报 ............................................15 6.总结与展望 ....................................................17 致谢 ........................................................18 参考文献 ........................................................19 附录A 81组分吸光度数据..........................................21 附录B MATLAB相关程序 28 摘 要：在多组分样品的分光光度法测定中，吸收曲线常会发生不同程度的重叠,采用一般分光光度法难于定量每一组分，而近年来发展起来的小波变换现已成为信息科学中的一个新兴研究领域，越来越多地应用于化学研究领域中各种复杂的、非线性的问题，也取得了很好效果。本文采用原始吸光度数据的1尺度低频系数C构造分析矩阵进行PLS回归分析，预测结果优于原始数据全谱模型。本文用小波变换-偏最小二乘回归分光光度法对对乙酰氨基酚(ACET)、愈创木酚甘油醚（GUAI）、咖啡因（CAFF）和扑尔敏（CHLO）的四组分体系进行了同时测定。加标回收率介于100.36-118.50%，结果基本满意。使用小波系数进行PLS建模，不仅可以消除原始信号中的部分噪声，而且较大地压缩了数据量，提高了预测精度。综上所述，小波变换-偏最小二乘法结合分光光度法为多组分的同时测定提供了一种新的简便、可靠的方法。 关键词：小波变换；偏最小二乘；紫外分光光度法；多组分同时测定；感冒液 Abstract: Determinate the multi-component samples, the absorption curve offen overlaps in varying degrees , It is difficult to quantitate each component using spectrophotometry generally, but the wavelet transforrrmtion (WT) in the field of chemical application which particularly in the field of nonlinear applications are very wide and have achieved good results. In this paper,Using a standard low-frequency coefficient C1 for the original absorbance data to structure analysis matrix to PLS regression analysis, forecasting results is better than the original entire spectrum model.In this paper using WT-PLS spectrophotometry to simultaneously determinate the Cough Syrup which has four components: acetaminophen, guuaifenesin, caffeine, p-aminophenol.the recovery ranged from 100.36% to 118.50% ,the result is basically satisfied. Using wavelet coefficients to build PLS model, not only can eliminate some of noise in the original signal , but also can greatly reduce the volume of data,the forecast accuracy can be improved,.In conclusion,the WT-PLS spectrophotometry provides a simple, reliable method for the simultaneous determination of multi-component. Keywords: wavelet transforrrmtion；PLS；UV spectrophotometry；simultaneous determination of multiple components；Cough Syrup
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婴儿配方奶粉的设计_食品科学与工程论文范文
食品科学与工程论文范文 目 录 中文摘要I 英文摘要II 目录III 绪论1 1.1前言1 1.2婴儿配方奶粉的定义3 1.3乳清多肽的功能特性5 实验部分7 2.1婴儿配方奶粉的设计7 2.2婴儿配方奶粉的工艺过程10 2.3婴儿配方奶粉的喷雾干燥12 2.4乳清多肽的替代性实验14 3.结果与讨论15 3.1婴儿配方奶粉配方的设计15 3.2婴儿配方奶粉设计性实验16 3.3乳清多肽的替代性实验18 总结与展望19 4.1实验的总结19 4.2展望20 致谢21 参考文献22 摘 要：婴儿配方奶粉是根据婴儿生长需要，尽可能模拟母乳的营养成分，当母乳不足或匮乏时，专供婴儿的主要食物。乳清蛋白含有α一乳白蛋白、β一乳球蛋白、血清白蛋白、免疫球蛋白等多种蛋白，营养价值较高。但由于乳清蛋白是热敏性蛋白，热变性后在水中溶解性明显下降，使乳清蛋白质的利用范围受到很大的限制。本次实验的任务是将乳清蛋白经生物降解为乳清多肽后用在婴儿配方奶粉中。在实验室配制出简易的婴儿配方奶粉，对其加工工艺进行初步探究。同时熟悉并掌握喷雾干燥的原理及操作方法。并用乳清多肽替代婴儿配方奶粉中的WPC80，在各项指标符合国家标准的前提下，进行初步的配伍，并掌握其加工过程中的工艺参数。经过反复进行实验，最终确定的参数为：称取原料200克，调配的复原乳浓度为10%，进风温度为190℃，排风温度为90℃。替代性实验的基本数据和参数，首先延用了婴儿配方奶粉的设计性实验中所得出的数据，再进行替代实验，发现配方奶粉的出粉质量较好，结焦现象少。 关键词：奶粉；奶粉配方；乳清多肽；工艺参数 Abstract:Infant formula is based on the growth needs of infants, the nutritional content of breast milk as simulation, inadequate or lack the time when the breast, specifically for the baby's main food.Whey protein α-lactalbumin with, β 1 lactoglobulin, serum albumin, immunoglobulin and other proteins, nutritional value. However, whey proteins are heat-sensitive protein, heat denatured soluble in water decreased, so that the use of whey protein range is greatly restricted. The experimental task is to whey protein is whey peptides by biodegradable after use in infant formula milk powder. In the laboratory a simple infant formula, a preliminary exploration of its processing technology. Also familiar with and master the principles and operation of spray drying method.Whey peptides with an alternative infant formula in WPC80, the indicators in line with national standards in the premise of a preliminary compatibility, and master the process of process parameters. Repeated the experiment to optimize the process parameters.After repeated experiments, the final parameters are determined: Weigh 200 grams of raw materials, allocation of reconstituted milk concentration of 10%, the temperature was 190 ℃, exhaust air temperature is 90 ℃. Alternative basic data and parameters of the experiment, the first extension of the infant formula with the design of the data obtained in the experiment, further substitution experiments found that formula milk powder out of good quality and less coking phenomenon. Key words: Milk; Milk formula; whey peptides; process parameters
