酸性染料比色法测定蒙成药道古勒·额布斯—7汤中苦参总生物碱的含量

采用酸性染料比色法测定道古勒·额布斯— 7汤中苦参总生物碱的含量 ,结果平均回收率为 98 3% ,RSD =0 70 % ,线性范围为 3 33～ 16 6 7μg/ml.     

紫地榆中总鞣质的含量测定

目的:建立紫地榆总鞣质的含量测定方法。方法:以没食子酸为对照品,采用比色法测定紫地榆总鞣质的含量。结果:以没食子酸计,紫地榆鞣质浓度在2.03~12.17μg/mL范围内与吸光度成良好的线性关系(r=0.999 4);平均加样回收率为99.1%,RSD为2.32%(n=8)。结论:该方法简便快速准确,可用于紫地榆总鞣质的含量测定。     

分光光度法测定川产乌头属植物总生物碱的含量

根据二帖类生物碱和酸性染料溴甲酚绿在酸性缓冲液中形成的络合物能被氯仿提取,并且提取液在415 nm处具有吸收值的原理,运用酸性染料比色法测定了四川境内乌头属植物总生物碱的含量.乌头碱的标准曲线范围是8.8-52.8μg/mL(r=0.999 87,n=6),其平均加样回收率为99.548%.该方法灵敏度高、简便、准确快速.     

茚三酮比色法测定野生及人工培养香菇和黑木耳中氨基酸含量

目的：比较野生及人工培养香菇和黑木耳中氨基酸的含量,为高效、经济地开发利用资源提供依据。方法：采用茚三酮比色法测定氨基酸含量。结果：在60～100mg/L浓度范围内,浓度与吸光度呈良好线性关系。回归方程：A=0．0152C-0．7928,r=0．9987,平均回收率为99．5％,RSD为0．06％（n=9）。野生及人工培养香菇中氨基酸的含量分别为14．54％、12．57％,野生及人工培养黑木耳中氨基酸的含量分别为8．83％、7．43％。结论：该方法操作简便,结果准确,重现性好。野生与人工培养的香菇和黑木耳中氨基酸含量没有显著差别。     

佛手氨基酸及多糖含量的测定

为了测定佛手中氨基酸及多糖的含量，采用微量凯氏定氮法测定粗蛋白，氨基酸自动分析仪测定氨基酸；用柱层析法分离、纯化多糖，电泳鉴定其纯度，苯酚—硫酸法比色测定多糖的含量。结果表明佛手中ω(粗蛋白)为9.375％，ω(氨基酸)为8．334％，含16种氨基酸，其中人体必需的氨基酸有6种；佛手水提取液经分离、纯化，得到3种多糖，经电泳鉴定为单一多糖，命名为JFS-Ⅰ、JFS-Ⅱ和JFS-Ⅲ，苯酚—硫酸比色法测得3种多糖的质量分数分别为41．2％、9．8％和21．4％。说明佛手具有较为丰富的氨基酸和多糖，提示有较高的营养价值和药用价值。     

巴西鲷肌肉营养成分分析

对巴西鲷成鱼肌肉中的水分、蛋白质、脂肪、灰色、硒含量及氨基酸、脂肪酸组成进行了分析，结果表明：巴西鲷骨肉蛋白质和脂肪含量均较高，分别为18.85%和6.95%，硒含量为260.1μg/100g（干重），必需氨基酸占氨基酸总量的48.43%，高度不饱和脂肪酸含量占脂肪酸总量的26.65%。     

台湾乳白蚁营养成分的初步分析

采用凯氏定氮法、索氏提取法、蒽酮比色法、火焰原子吸收光谱法等对台湾乳白蚁的营养成分进行了初步分析,分别测定了台湾乳白蚁的蛋白质、脂肪、可溶性糖含量以及矿质元素如铁、铜、锰、锌、镁等的含量.研究结果表明,台湾乳白蚁蛋白质含量为16.86%;脂肪含量为10.09%;可溶性糖含量为0.39%;水分含量为70.42%;灰分含量为1.25%;矿质元素含量中铁为293.068 0μg/g;铜为20.911 4μg/g;锰为15.014 3μg/g;锌为62.861 0μg/g;镁为653.770 5μg/g.其营养价值高于一般的动物食品.     

烟台产区6种酿酒白葡萄中氨基酸的测定

采用在线衍生-高效液相色谱法对烟台产区6种酿酒白葡萄中17种氨基酸含量进行测定。方法线性关系良好(R20.999),回收率90%~105%,精密度1.4%~4.1%,不同品种酿酒葡萄中必需氨基酸含量2 731.99~7 811.80μg/g,氨基酸总量13 397.48~50 395.31μg/g,必需氨基酸占氨基酸总量的比例为15.02%~30.25%。霞多丽葡萄必需氨基酸和氨基酸总量最高,贵人香葡萄次之。氨基酸含量与葡萄品种有一定关系。     

萝芙木药材中总生物碱的含量测定方法研究

用氯仿提取总生物碱,通过酸性染料比色法测定萝芙木药材中总生物碱含量。结果萝芙木生物碱在8.0～24.0μg具有良好的线性关系(r=0.9914),平均回收率为100.1%,RSD为0.65%。该方法简单,准确,可用于萝芙木药材的质量控制。     

恩施野生葛块根营养成分及微量元素硒的研究

用干燥法测定恩施的野生葛块根中干物质的质量分数，用水提法提取葛根中的粗淀粉并测定其质量分数，采用比色法测定干葛根及葛根粗淀粉中硒的质量分数。结果表明，恩施野生葛块根中干物质的质量分数为33．02％—38．26％，粗淀粉的质量分数为15．15％～18．79％，干物质硒的质量分数为1．69—2．66μg/g，粗淀粉中硒的质量分数为0．130—0．157μg/g，占总硒质量分数的5．64％～8．63％，适合开发各种富硒食品及药品，是一种较理想的保健品原料。     

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

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