青海油菜蜂花粉的破壁及黄酮的测定

采用生物复合酶对青海油菜花粉进行破壁,条件温和,操作简单,破壁率可达90%以上.通过分析红外、紫外光谱图,可以确定花粉中含有二氢黄酮(圣草酚)类物质.     

用液氮淬冷法进行花粉破壁的实验研究

通过正交设计实验，利用液氮将油菜花粉进行深低温超快速冷冻处理后，借助显微镜对解冻后的花粉进行显微观察，拍照和破壁率统计，同时采用苯酚-硫酸法进行胞外总糖含量测定，实验表明油菜花粉破壁优化条件为：外包紫铜，解冻温度95℃，反复冻结解冻3次，此时每克花粉中胞外总糖变化量最大值达59.588mg(以葡萄糖计），较未经冻结解冻处理的上升了31.25%，破壁率达94.97%.     

复方超声破壁花粉冲剂降血脂的初步研究

应用超声技术对内含丰富的营养成份而表面 一层坚硬外壁的植物花粉进行破壁处理,并以破壁花粉为主要原料,与多种具有降脂作用的中草 药配制成“降脂灵”。经过临床试验表明：“降脂灵”具有降脂疗效且未见副作用。     

油菜花粉破壁技术研究

以双子叶植物中的十字花科芸苔属油莱(Bassica Campestros L．)为试验材料，探讨了水合法、冷冻酶解法、直接酶解法、水合-酶解二步法和三步法等多种破壁方法，比较得出油莱成熟花粉，水合法破外壁最为理想，而其中以1mol／L蔗糖为水合液最好，其破外壁率可达92．4％。油莱幼嫩花粉的破壁以水合-酶解二步法最好，其中以0．8mol／L甘露醇 2％纤维素酶组合最好，其破壁率达85．7％。     

仿生破壁花粉和花粉茶精的异军突起

国内首创的“仿生破壁花粉”和“花粉茶精”，是北京顺义紫云蜂业有限公司科研人员在拓展原有峰产品的领域和立足原有蜂产品的基础上，自行研制开发的新一代保健产品。“仿生破壁花粉”模拟生物工程对花粉细胞进行“破壁处理”，实现了蜂花粉微观破壁形态，使蜂花粉破壁后近似完壁性而保护内容物不受破坏，保持了花粉全营养和活性物质的全效价，破壁率近100％，其内容物易被人体完全吸收。花粉茶精是一种把蜂花粉和茶的精华成分融为一体，以多营养聚合物作赋型保护剂复合而成的饮品，是横跨花粉和茶叶两大行业市场的新型产品，含100种以上的益康物质，可全面维护人类的健康。     

蜂花粉对四氯化碳所致小鼠急性肝损伤保护作用的病理学分析

探讨蜂花粉对四氯化碳(CCl4)所致的小鼠急性肝损伤的预防作用,观察其肝组织的病理变化。将48只小鼠随机分成6组:对照组、模型组、破壁花粉高、低剂量组、未破壁花粉高和低剂量组。第1～9天,花粉组每日灌胃给药1次,正常对照组与模型对照组灌胃给予等体积的饮用水,给药24 h后,用四氯化碳致小鼠急性肝损伤,观察比较各组小鼠的肝脏病理组织学变化。结果发现,病理学观察表明蜂花粉各剂量组可预防CCl4引起的肝细胞肿胀、气球样变等减轻急性肝损伤的肝脏损伤程度的病理改变。蜂花粉对CCl4引起的急性化学性肝损伤均有预防作用,破壁蜂花粉效果最明显,并存在量效关系。     

青藏高原油菜蜂花粉油热值的测定

采用量热法对石油醚冷浸法和CO2超临界萃取法从青藏高原油菜蜂花粉中提取的油,进行了燃烧值的测定,并对破壁花粉油和未破壁花粉油的热值进行了比较.     

青藏高原油菜蜂花粉油理化性质的测定

以石油醚为溶剂,在室温条件下对青藏高原油菜蜂花粉中的脂肪油进行了冷浸提取,对油的理化性质进行了测定,并对破壁花粉和未破壁花粉中提取的油的理化指标进行了对比.     

洋槐花粉的破壁技术及其口服液的研制

介绍洋槐花粉的破壁技术及以洋槐花粉为主要原料生产洋槐花粉口服液的生产工艺及产品质量标准     

超声波协同碳酸钠或氯化钠法对黑木耳破壁的研究

以可溶性物质含量为指标,以温度(20~60℃)和时间(10~90min)为因素,通过均匀设计法考察超声波(300 W)对黑木耳破壁的影响.结果表明:可溶性物质(y)与温度(x1)和时间(x2)呈函数关系,y=15.629 3+0.173 6x1+0.0025 56x22(R2=0.953 6,P0.01);根据方程计算极大值和实际验证,功率为300 W情况,温度60℃、时间90min为最佳破壁条件.在最佳破壁条件下,以0.50%的Na2CO3和1.00%的NaCl溶液代替水,均可提高(P0.01)黑木耳破壁效果.     

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.     

Features of Women's language

Language is a means of verbal communication. People use language to communicate with each other. In the society, no two speakers are exactly alike in the way of speaking. Some differences are due to age, gender, statue and personality. Above all, gender is one of the obvious reasons. The writer of this paper tries to describe the features of women＇s language from these perspectives： pronunciation, intonation, diction, subjects, grammar and discourse. From the discussion of the features of women＇s language, more attention should be paid to language use in social context. What＇s more, the linguistic phenomena in a speaking community can be understood more thoroughly.     

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     

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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Brief Introduction to “Journal of Jilin University( Science Edition) ”

<正>"Journal of Jilin University(Science Edition)"is a comprehensive academic journal in the fields of science sponsored by Jilin University and administrated by the Ministry of Education of the Peoples Republic of China.The journal started publication in 1955.The original name at starting publication was"Journal of Natural Science of Northeast People University",which was changed into"Acta Scientiarum Naturalium Universitatis Jilinensis"in 1958 owing to the name change of the university.The present journal name has