酸碱加热法提取紫花苜蓿叶蛋白的最佳工艺参数

研究了用酸碱加热法提取紫花苜蓿叶蛋白的最佳工艺参数.设计了加热时间、加热温度和pH值3个单因素试验,并在单因素试验的基础上设计了正交试验.结果表明,最佳工艺参数为:pH值4.5,温度80 ℃,加热时间5 min,打浆时间9 min.     

苜蓿叶蛋白提取效果及叶蛋白氨基酸组成的研究

采用不同浓度的硫酸铵和不同组合的酸化、碱化方法,提取苜蓿叶蛋白研究发现:采用加热,加醇复合处理效果比单一酸碱处理效果好;优化处理组分析表明采用30%硫酸铵提取苜蓿叶蛋白效果最好;苜蓿叶中蛋白氨基酸种类齐全,含量高,比例协调,是一种蛋白含量高的植物蛋白.     

不同生育期苜蓿叶蛋白的营养价值

利用直接加热法提取了不同生育期的苜蓿叶蛋白，并对其进行了营养价值评价。结果显示，苜蓿叶蛋白较适合少年的需要，其中初花期叶蛋白的营养价值最高。     

齿果酸模叶蛋白提取的初步研究

采用热絮凝法提取齿果酸模的叶蛋白,对加水倍量、打浆时间、pH、加热时间和加热温度等5个影响叶蛋白提取得率的因素进行了研究.在单因素基础上,对加水倍量、打浆时间、pH值和加热温度进行4因素3水平正交试验.方差分析结果表明,影响粗蛋白提取得率的因素依次为加水倍量,打浆时间,pH,加热温度.最佳工艺条件组合为加水倍量3.5倍,打浆时间2 min,pH值4,加热温度70℃.     

葎草叶蛋白提取工艺的优化

对配合使用酸法、碱法以及加热法提取葎草叶蛋白的工艺及工艺条件进行了初步的研究，以提高其蛋白质含量。分别进行了浸提剂pH值、料液比、打浆时间、浸提时间、汁液pH值和絮凝温度对蛋白质影响的单因素实验研究，结果表明，葎草叶蛋白的最佳提取工艺条件：常温下料液比1：5，打浆时间3min，浸提时间3min，浸提剂的pH值为6～8；葎草叶蛋白的分离条件为70℃时，沉淀分离得到叶绿体叶蛋白，调pH值为10时分离出细胞质叶蛋白Ⅰ，调pH值为2时分离出细胞质叶蛋白Ⅱ；葎草叶蛋白产品在60—80℃条件下干燥。采用此工艺提取葎草叶蛋白的得率为4．62％。     

中药甘草水溶性多糖的提取与测定

对中药甘草水溶性多糖的提取工艺进行了研究，并探讨了脱蛋白的优选方案．正交试验表明，水煎煮法提取水溶性甘草多糖的最佳工艺条件为：料液比为1：8，温度控制在90℃，提取时间为3h；超声法提取水溶性甘草多糖的最佳工艺条件为：料液比为1：8，超声功率为100W，提取时间15min．脱蛋白的最优方法为：三氯乙酸-Sevag法．结果表明，在最佳提取工艺条件下，超声法提取水溶性甘草多糖的量是水煎煮法的2．77倍，说明超声法是从甘草中提取水溶性多糖的一种较好的方法．     

可食苜蓿叶蛋白提取工艺研究

为了开发新的食品用蛋白资源,以苜蓿为原料,采用盐析和热絮凝相结合的方法提取苜蓿叶蛋白．以单因素试验设计分别考察料液比、加盐量、提取液pH值和絮凝温度对可溶性蛋白提取率的影响．以单因素试验结果为依据,采用三因素三水平正交试验设计对料液比、加盐量、pH值进行工艺优化．试验结果表明：影响可溶性蛋白提取率的因素从大到小依次为料液比、加盐量、pH．絮凝温度70℃、时间10min时最佳工艺条件组合为料液比1：20、加盐量4％、pH5,在此条件下可溶性蛋白的提取率达29．58％,叶蛋白中可溶性蛋白含量可达52．71％．     

多指标综合评分法优选木芙蓉叶提取工艺

目的:通过多指标综合评分法优选木芙蓉叶的提取工艺,确定木芙蓉叶的提取工艺参数。方法:以料液比、乙醇浓度、提取次数、提取时间为主要因素设计正交试验L_9(3~4),用重复正交试验法,以浸出物、黄酮量、芦丁和金丝桃苷含量为评价指标,采用加权综合评分法对实验数据进行分析,优选出木芙蓉叶最佳提取工艺并进行验证性试验。结果:木芙蓉叶最佳提取条件为:14倍量70%的乙醇回流3次,每次2 h。结论:验证性试验中木芙蓉叶4个指标含量均高,优选出的提取工艺合理简单、稳定可行。     

超声波辅助提取栝楼叶蛋白的最佳工艺条件

采用超声波辅助碱法提取栝楼叶蛋白.在单因素实验的基础上,通过正交实验得到了超声波辅助碱法提取栝楼叶蛋白的最佳工艺条件.在温度为55 ℃、pH值为10、超声时间为40 min、超声功率为150 W、料液比为1∶25（g∶mL）、NaCl的浓度为0.5 mol/L的最佳工艺条件下,叶蛋白提取率达到23.26%.     

刺五加丁香苷提取工艺的研究

为了优选刺五加中丁香苷的最佳提取工艺,分别采用温浸法、超声法、加热回流法三种提取方式提取刺五加中的丁香苷,并采用L9(33)正交试验,以丁香苷含量和干浸膏回收率为指标,以HPLC法为检测方法,对影响刺五加的加热回流提取工艺的因素水平进行了研究.结果表明:刺五加苷的最佳提取工艺为用15倍量的水加热回流提取3次,每次1h,提取时间影响差异显著.水加热回流提取工艺用于刺五加的提取,工艺合理,操作简单,成本低,质量稳定,适合于工业化生产.     

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.     

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.     

A computer generator for randomly layered structures

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

Perspherical Approaches for Electrons in Atoms and Charged Excitons in Quantum Wells

Instead of following Fock’s expansion,we solve the Schrodinger equation for some quantum mechanical manybody systems such as electrons in atoms and charged excitons in quantum wells in a similar way in hyperspherical coordinates by expanding the wave functions into orthonormal complete basis sets of the hyperspherical hannonics(HHs)of hyperangles and generalized Laguerre polynomials(GLPs)of the hyperradius.This leads the equation to     

Advances in broadband wireless communications under high-mobility scenarios

Future mobile communication systems aim at providing very high data transmission rates, even in high-mobility scenarios such as high-speed wheel-track trains, maglev trains, highway vehicles, airplanes, guided missiles or spacecraft. A particularly important commercial application is the strong and increasing worldwide demand for high- speed broadband wireless communications （up to 574.8 km/ h test speeds or 380 km/h commercial speeds） in railways, providing data, voice and video services for applications such as onboard entertainment services to passengers, train control, train dispatch, train sensor status handling and sur- veillance. In such high-mobility scenarios, there are a number of communication challenges, including fast hand- over, location updating, high-speed channel modeling, estimation and equalization, anti-Doppler spreading tech- niques, fast power control, and dedicated network architec- ture. Because signal transmission in very high-speed scenarios will inevitably experience serious deterioration, it is imperative to develop key broadband mobile communi- cation techniques for such high-speed vehicles.     

Wuhan University Journal of Natural Sciences TOTAL CONTENTS

<正>~~     

海南岛地体及其毗邻陆缘晚中生代—新生代古地磁研究和构造演化

本文叙述了对海南岛及其毗邻大陆边缘白垩纪到第四纪地层岩石进行古地磁研究的全部工作过程。通过分析岩石中剩余磁矢量的磁偏角及磁倾角的变化,提出海南岛白垩纪以来经历的构造演化模式如下:早期伴随顺时针旋转而向南迁移,后期伴随逆时针转动并向北运移。联系该地区及邻区的地质、地球物理资料,对海南岛上述的构造地体运动提出以下认识:北部湾内早期有一拉张作用,主要是该作用使湾内地壳显著伸长减薄,形成北部湾盆地。从而导致了海南岛的早期构造运动,而海南岛后期的构造运动则主要是受南海海底扩张的影响。海南地体运动规律的阐明对于了解北部湾油气盆地的形成演化有重要的理论和实际意义。     

Scale-based spatial data model for GIS

Being the primary media of geographical information and the elementary objects manipulated, almost all of maps adopt the layer-based model to represent geographic information in the existent GIS. However, it is difficult to extend the map represented in layer-based model. Furthermore, in Web-Based GIS, It is slow to transmit the spatial data for map viewing. In this paper, for solving the questions above, we have proposed a new method for representing the spatial data. That is scale-based model. In this model we represent maps in three levels: scale-view, block, and spatial object, and organize the maps in a set of map layers, named Scale-View, which associates some given scales.Lastly, a prototype Web-Based GIS using the proposed spatial data representation is described briefly.     

Exciton Seebeck in Molecular Systems

Various applications relevant to the exciton dynamics,such as the organic solar cell,the large-area organic light-emitting diodes and the thermoelectricity,are operating under temperature gradient.The potential abnormal behavior of the exicton dynamics driven by the temperature difference may affect the efficiency and performance of the corresponding devices.In the above situations,the exciton dynamics under temperature difference is mixed with     

Achieving Unusual States of Matter Under High Pressure

The elongation method,originally proposed by Imamura was further developed for many years in our group.As a method towards O(N)with high efficiency and high accuracy for any dimensional systems.This treatment designed for one-dimensional(ID)polymers is now available for three-dimensional(3D)systems,but geometry optimization is now possible only for 1D-systems.As an approach toward post-Hartree-Fock,it was also extended to