转基因大豆油脂肪酸成分分析

通过GC-MS分析10种不同品牌的转基因大豆油和传统普通大豆油中的脂肪酸结构组成,评价基因改性对大豆油脂肪酸营养成分的影响,为人们在转基因的选择上提供依据。结果表明大豆油中富含不饱和脂肪酸,相对含量最高的是多不饱和脂肪酸C18:2,高达60%。转基因大豆油中的脂肪酸含量与传统普通大豆油无显著性差异。脂肪酸成分的聚类分析显示,10种大豆油交织在一起,无分类现象。研究结果表明,转基因大豆油中的脂肪酸与传统普通大豆油实质等同,食用转基因大豆油能够提供等同的饱和脂肪酸营养成分。     

高油大豆田间管理

提高高油大豆产量,除因地制宜选择优质高产、熟期适宜、抗病抗逆性强的高油大豆品种;播前精选种子;合理轮作、精细整地;适时播种及播前施足底肥等措施外,播后的田间管理也是确保高油大豆丰产的重要环节.     

从大豆毛油中提取卵磷脂的工艺研究

对从大豆毛油中提取卵磷脂的工艺进行了研究。以大豆毛油为原料,通过水化脱胶、丙酮去油和乙醇萃取等过程,能提取制得纯度较高的卵磷脂。在此基础上,获得了实验室内提取卵磷脂的工艺条件,为日后的工业生产提供参考依据。     

大豆赤变是出油率降低的重要原因之一

大豆赤变即大豆品质的劣变。其最常发生的品质变化为走油赤变。当大豆合水份在14％以上，环境温度在25摄氏度以上时，大豆脐部两侧呈对称性的红变，随着范围的扩大和颜色的加深，表皮失去光泽，豆粒变软并有沁油现象。这种走油赤变的大豆，除在外观上与正常大豆有明显不同外，其内在的化学成份和含量也会发生不同程度的变化，那么大豆赤变对出油率有什么影响呢？为此，我们对发生赤变大豆的粗脂肪含量进行了测定实验，其结论为大豆赤变后thh肪含量下降，出油率降低。一、样品的配制与实验方法我们以当地的大豆做为样品，进行了实验。这组样…     

骨髓膏

废弃的动物骨头是一种良好的食品原料,骨汁可生产天然调味料。如从骨头中提取的明胶可作糖果、冷饮原料;骨油可制造人造奶油和调味油;骨粉可作各种食品的钙强化剂。除了这些用途以外,还可以将骨头加工成骨髓膏,作肉制品的原料。采用超级胶体磨可以把鸡骨、猪骨、牛骨等骨头制成营养丰富、美味可口的骨髓膏,其加工流程如下:     

大豆天然甾醇的提取

用皂化法研究了7种不同原料中大豆甾醇的提取量，实验表明大豆油脱臭馏出物（简称DD油））是大豆箱醇提取的理想原料，对皂化法从DD油中提取大豆甾醇的实验条件进行正交优化，最佳实验条件是：400gDD油，500mL乙醇（95％），50gKOH（82％），回流皂化2h．在此条件下．粗甾醇的产量为26.0g，纯度为47.5％．     

不同热处理方法对全脂大豆脲酶活性的影响

脲酶活性是衡量全脂大豆中抗营养因子活性的指标,尤其能指示全脂大豆中抗胰蛋白酶活性的高低.本试验采用pH升值法,对成都农贸市场所售全脂大豆布点采样,以生全脂大豆脲酶活性为对照,对焙炒、蒸煮、微波三种不同热处理方法和不同处理时间的尿酶活性进行测定.研究探讨不同热处理方法、不同处理时间对全脂大豆脲酶活性变化规律的影响.测定结果表明:三种不同热处理方法均随处理时间的延长脲酶活性呈下降趋势.其中焙炒30和40分钟全脂大豆的pH升值为0.14和0.10; 蒸煮40分钟时全脂大豆的pH升值为0.20; 微波处理4分钟时全脂大豆的pH升值为0.09.上述不同热处理方法的处理时间为全脂大豆的适宜热处理时间.     

风味鱼制品营养品质的跟踪分析

从某大型超市销售的20多个产品中随机抽取有代表性的4个风味鱼仔产品,根据国家标准,对4个产品的鱼肉营养品质、调味油脂肪酸组成及品质进行了检测.结果表明:四个样品鱼肉的蛋白质含量适中,脂肪含量都很低.四个样品的鱼肉蛋白均含18个氨基酸,必需氨基酸指数介于57~66之间,必需氨基酸含量与总氨基酸含量之比为40%左右、必需氨基酸含量与非必需氨基酸含量之比超过60%;四个样品中限制性氨基酸数量最多的有6种,最少的有2种;鲜味氨基酸超过氨基酸总量的35%,以谷氨酸含量最高、天冬氨酸次之,它们是特征性鲜味氨基酸.四个样品所用调味油含有15种脂肪酸,尤以单不饱和脂肪酸与多不饱和脂肪酸含量丰富,单不饱和脂肪酸超过总脂肪酸量的24%、多不饱和脂肪酸则超过52%.综合地看,四个代表性产品的必需氨基酸营养组成合理,鲜味氨基酸和不饱和脂肪酸含量丰富,具有较好的食用价值和保健作用.     

soja亚属的数量分类学研究

以不同进化类型的7 个大豆居群为分类运算单位,选取了28 个形态学、生态学性状,对不同进化类型的大豆居群进行了数值分类研究.Q 分析及图论分析揭示野大豆、半野生大豆与栽培大豆之间存在较大差异.主成份分析表明前三主成份可保留总信息量的91 .05 % ,说明种内居群分类所选性状合理,并能在三维空间表达各居群间的相对位置.     

W-HE生物表面活化剂应用效果研究

W-HE生物表面活化剂是一种新型植物生长调节剂,能促进农作物的增产增收,本研究以大豆、玉米为例,研究W-HE生物表面活化剂对大豆、玉米幼苗生长的促进作用,实验结果表明,施用W-HE生物表面活化剂后,大豆增产9.46%,玉米增产8.9%.     

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.     

Characterization of Ordovician carbonate reservoirs, southeastern Saskatchewan, Canada

The discovery of the prolific Ordovician Red River reservoirs in 1995 in southeastern Saskatchewan was the catalyst for extensive exploration activity which resulted in the discovery of more than 15 new Red River pools. The best yields of Red River production to date have been from dolomite reservoirs. Understanding the processes of dolomitization is, therefore, crucial for the prediction of the connectivity, spatial distribution and heterogeneity of dolomite reservoirs.The Red River reservoirs in the Midale area consist of 3～4 thin dolomitized zones, with a total thickness of about 20 m, which occur at the top of the Yeoman Formation. Two types of replacement dolomite were recognized in the Red River reservoir: dolomitized burrow infills and dolomitized host matrix. The spatial distribution of dolomite suggests that burrowing organisms played an important role in facilitating the fluid flow in the backfilled sediments. This resulted in penecontemporaneous dolomitization of burrow infills by normal seawater. The dolomite in the host matrix is interpreted as having occurred at shallow burial by evaporitic seawater during precipitation of Lake Almar anhydrite that immediately overlies the Yeoman Formation. However, the low δ18O values of dolomited burrow infills (-5.9‰～ -7.8‰, PDB) and matrix dolomites (-6.6‰～ -8.1‰, avg. -7.4‰ PDB) compared to the estimated values for the late Ordovician marine dolomite could be attributed to modification and alteration of dolomite at higher temperatures during deeper burial, which could also be responsible for its 87Sr/86Sr ratios (0.7084～0.7088) that are higher than suggested for the late Ordovician seawaters (0.7078～0.7080). The trace amounts of saddle dolomite cement in the Red River carbonates are probably related to "cannibalization" of earlier replacement dolomite during the chemical compaction.     

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.     

A computer generator for randomly layered structures

AcomputergeneratorforrandomlylayeredstructuresYUJia shun1,2,HEZhen hua2(1.TheInstituteofGeologicalandNuclearSciences,NewZealand;2.StateKeyLaboratoryofOilandGasReservoirGeologyandExploitation,ChengduUniversityofTechnology,China)Abstract:Analgorithmisintrod…     

An Index mechanism for multi-scale view in spatial databases

There are numerous geometric objects stored in the spatial databases. An importance function in a spatial database is that users can browse the geometric objects as a map efficiently. Thus the spatial database should display the geometric objects users concern about swiftly onto the display window. This process includes two operations:retrieve data from database and then draw them onto screen. Accordingly, to improve the efficiency, we should try to reduce time of both retrieving object and displaying them. The former can be achieved with the aid of spatial index such as R-tree, the latter require to simplify the objects. Simplification means that objects are shown with sufficient but not with unnecessary detail which depend on the scale of browse. So the major problem is how to retrieve data at different detail level efficiently. This paper introduces the implementation of a multi-scale index in the spatial database SISP (Spatial Information Shared Platform) which is generalized from R-tree. The difference between the generalization and the R-tree lies on two facets: One is that every node and geometric object in the generalization is assigned with a importance value which denote the importance of them, and every vertex in the objects are assigned with a importance value,too. The importance value can be use to decide which data should be retrieve from disk in a query. The other difference is that geometric objects in the generalization are divided into one or more sub-blocks, and vertexes are total ordered by their importance value. With the help of the generalized R-tree, one can easily retrieve data at different detail levels.Some experiments are performed on real-life data to evaluate the performance of solutions that separately use normal spatial index and multi-scale spatial index. The results show that the solution using multi-scale index in SISP is satisfying.     

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