双歧杆菌微胶囊的研究

以海藻酸钠／壳聚糖为壁材，用表面交联法将活性双歧杆菌微胶囊化，并观察了微胶囊的耐胃酸性、常温贮存稳定性和低温贮存稳定性。     

二氢杨梅素的微胶囊化

选用阿拉伯胶和麦芽糊精作壁材,研究了喷雾干燥法制备二氢杨梅素微胶囊的壁材组成及工艺条件.结果表明：最佳壁材组成为二氢杨梅素/壁材15/85,阿拉伯胶/麦芽糊精70/30;最佳喷雾干燥工艺条件为进风温度190 ℃,固型物20%,微胶囊的包埋效率可达95%.     

紫苏叶精油微胶囊的工艺优化及稳定性研究

采用单凝聚法制备了紫苏叶精油微胶囊（PO/GE）,优化了其制备工艺,考察了相关稳定性指标.采用明胶（GE）为壁材,以紫苏叶精油（Perilla Oil,PO）为芯材,以包埋率为指标,根据单因素试验结果,基于BoxBehnken中心组合设计和响应面法,建立二次多项式回归方程预测模型,得到最佳的工艺条件为：芯壁质量比为1.5∶1、单凝聚时间为63.9 min、单凝聚温度为39.1℃、反应p H值为3.6.以上优化条件制备的紫苏叶精油微胶囊形貌完整,包埋率理论值可达90.1%,常温和加温时较未包裹精油稳定性增加.     

原位聚合法制备甲维盐微胶囊的研究

采用原位聚合法制备以脲醛树脂为壁材的甲维盐微胶囊制剂.研究了壁材与芯材的比例、分散乳化剂、催化剂、反应温度和搅拌速度5因素对微胶囊产品的影响,得出最优化的工艺为:壁材与芯材的比例为m(壁材)∶m(芯材)=8.0∶2.0,以聚丙烯酸钠为分散乳化剂,氯化铵为酸性催化剂,加入速度以2h加完,终点pH值为2.0,缩聚反应温度控制在70℃左右,反应时间为3h,搅拌速度为1000r/min.结果表明以此获得的产品具有良好的缓释效果.     

鞣质微胶囊化工艺的研究

以鞣质为原料,对其进行微胶囊化,以改善其油溶性,掩盖来自原料的不良风味,提高其稳定性.研究了微胶囊化鞣质的壁材组成及工艺条件.通过单因素实验确定壁材为β-环糊精、乙基纤维素、海藻酸钠组成的复合壁材,采用正交实验确定微胶囊化的最佳工艺条件,结果表明：心材鞣质与复合壁材的质量比为1：5,β-环糊精与乙基纤维素质量比为6：1,海藻酸钠与复合壁材质量分数为0.6%,乳化剂与心材鞣质质量分数为0.1%.微胶囊囊壁的局部结构表现为致密的整体结构,说明该产品具有较好的包埋效果.     

溶剂挥发法制备还原型谷胱甘肽微胶囊

以玉米胚中还原型谷胱甘肽为芯材,以海藻酸钠为壁材,采用溶剂挥发法对玉米胚中还原型谷胱甘肽进行微胶囊化研究.选二氯甲烷为有机溶剂,通过单因素实验及正交试验得出微胶囊化的最佳工艺条件:壁材质量分数为4.0%、壁材芯材比为15∶1、明胶质量分数2%、搅拌速度4 000 r/min微胶囊包埋率可达63.12%.     

马尾松半同胞家系纤维形态遗传变异及纸浆材优良家系选择

纤维形态的物理特征是马尾松纸浆材新品种选育的重要性状。该研究以22年生29个马尾松初级种子园半同胞家系的木材样品为材料,对其木材纤维进行了遗传变异分析、相关分析及优良家系选择。结果表明:纤维性状在家系间和家系内均存在一定幅度的变异,纤维长度、纤维宽度、纤维长宽比、柔性系数以及壁腔比5个性状的早材变异系数均大于晚材,家系水平的纤维选择主要是针对早材的选择。方差分析表明:家系间平均晚材纤维宽度、平均晚材纤维腔径宽、平均晚材纤维长度以及早晚材平均纤维长度差异显著,家系遗传力为0.38～0.51,家系水平的纤维改良潜力较大。年龄与纤维长、晚材长宽比、纤维壁厚、壁腔比、柔性系数、刚性系数等6个指标呈显著相关或相关显著;年轮宽度与纤维宽、纤维长、纤维长宽比、壁腔比、壁厚、刚性系数和柔性系数等7个纤维形态指标呈显著相关,晚材率与纤维宽、纤维长、长宽比、壁厚、早材壁腔比、早材刚性系数和早材柔性系数等指标相关显著,年轮宽可作为马尾松家系纤维的间接选择指标。通过对生长和纤维含量及质量进行综合评价,113号家系入选为定向培育制浆造纸材的优良家系。     

辛烯基琥珀酸淀粉酯的制备及应用

研究了辛烯基琥珀酸淀粉酯的生产方法、工艺路线，并对其系列产品在微胶囊壁材中的应用进行了探讨．实验结果表明，在本实验条件下，以柠檬油为芯材，辛烯基琥珀酸淀粉酯为壁材，壁材与芯材的最佳质量比为3：2，淀粉酯最佳的DE值为12．所得产品的微胶囊化产率和效率都接近100％．     

喷雾干燥法制备A群链球菌微胶囊

采用喷雾干燥法制备A群链球菌微胶囊,以明胶、阿拉伯胶为壁材,以A群链球菌为芯材,将芯材与壁材按照1：12．5的比例进行喷雾干燥。经SEM和显微镜测定表明,制备的A群链球菌微胶囊外形比较圆整。     

微胶囊陈皮软糖的制备和工艺研究微胶囊陈皮软糖的制备和工艺研究

研究了柑橘精油微胶囊化及陈皮软糖的制备,通过显微镜、流变仪、粒度仪等检测柑橘精油的胶囊化效果.选择不同壁材浓度、芯材与壁材比、进风温度对喷雾干燥的柑橘精油微胶囊化的生产工艺进行研究.结果表明,采用质量分数为25%的改性淀粉乳状液,芯材与壁材比为1∶1.5,进风温度为150℃,出口温度为75℃,所得柑橘精油微胶囊效果较好.按配方制备的陈皮软糖口味纯正,贮藏稳定性好.     

Markedness and its Interpretation in Language Use

Language markedness is a common phenomenon in languages, and is reflected from hearing, vision and sense, i.e. the variation in the three aspects such as phonology, morphology and semantics. This paper focuses on the interpretation of markedness in language use following the three perspectives, i.e. pragmatic interpretation, psychological interpretation and cognitive interpretation, with an aim to define the function of markedness.     

低渗透非均质砂岩油藏启动压力梯度研究

理论推导与室内实验相结合,建立了低渗透非均质砂岩油藏启动压力梯度确定方法。首先借助油藏流场与电场相似的原理,推导了非均质砂岩油藏启动压力梯度计算公式。其次基于稳定流实验方法,建立了非均质砂岩油藏启动压力梯度测试方法。结果表明:低渗透非均质砂岩油藏的启动压力梯度确定遵循两个等效原则。平面非均质油藏的启动压力梯度等于各级渗透率段的启动压力梯度关于长度的加权平均;纵向非均质油藏的启动压力梯度等于各渗透率层的启动压力梯度关于渗透率与渗流面积乘积的加权平均。研究成果可用于有效指导低渗透非均质砂岩油藏的合理井距确定,促进该类油藏的高效开发。     

On Tragic Consciousness In The Works By Ernest Hemingway

As an American modern novelist who were famous in the literary world, Hemingway was not a person who always followed the trend but a sharp observer. At the same time, he was a tragedy maestro, he paid great attention on existence, fate and end-result. The dramatis personae's tragedy of his works was an extreme limit by all means tragedy on the meaning of fearless challenge that failed. The beauty of tragedy was not produced on the destruction of life, but now this kind of value was in the impact activity. They performed for the reader about the tragedy on challenging for the limit and the death.     

Achieving Unusual States of Matter Under High Pressure

正The periodicity of the elements and the non-reactivity of the inner-shell electrons are two related principles of chemistry,rooted in the atomic shell structure.Within compounds,Group I elements,for example,invariably assume the+1 oxidation state,and their chemical properties differ completely from those of the p-block elements.These general rules govern our understanding of chemical structures and reactions.Using first principles calcula-     

Exchange-Correlation and Electronic Excitation Energies from Pairing Matrix Fluctuations

We have developed an adiabatic connection to formulate the ground-state exchange-correlation energy in terms of pairing matrix linear fluctuations.This formulation of the exchange-correlation energy opens a new channel for density functional approximations based on the many-body perturbation theory.We illustrate the potential of such approaches with an approximation based on the particle-particle Random Phase Approximation(pp-RPA).This re-     

Density Functional Theory for the Response of Periodic Systems to Electric Fields Based on the Vector Potential Approach

正The electronic and nuclear(structural/vibrational)response of 1D-3D nanoscale systems to electric fields gives rise to a host of optical,mechanical,spectral,etc.properties that are of high theoretical and applied interest.Due to the computational difficulty of treating such large systems it is convenient to model them as infinite and periodic(at least,in first approximation).The fundamental theoretical/computational problem in doing so is that     

On the Thermodynamic Limit for Responses to Static Electromagnetic Fields

For molecular systems,the quantum-mechanical treatment of their responses to static electromagnetic fields usually employs a scalar-potential treatment of the electric field and a vector-potential treatment of the magnetic field.Although the potential for each field separately is associated with the choice of an(unphysical)origin,the precise choice of the origin for the electrostatic field has little consequences for the results.This is different for the     

An affordable accurate evaluation of the binding conformations predicted by molecular docking studies in bio-system

Franck-Condon factors bridge the gap between theoretical modeling and experimental observations for molecular electronic spectroscopy and electron transfer.Under the displaced harmonic oscillator approximation,multidimensional Franck-Condon factors are decomposed into a product of many one-dimensional(1D)Franck-Condon(FC)factors,and each 1D-FC factor is associated with one Huang-Rhys factor that determines the leading contribution of     

Call for Papers

<正>"The Journal of Shanghai Normal University:Mathematics"is published by Shanghai Normal University as regular issues of The Journal of Shanghai Normal University each year from 2014 in English.The editors-in-chief of the issues are professors Yuhao Cong and Maoan Han.The Journal of Shanghai Normal University was started in 1958 with     

Journal of Donghua University ( English Edition) Contents of Volume 31

正~~