超滤浓缩担子菌发酵液聚合物的研究

利用中空纤维超滤器对灵芝发酵液中聚合物的浓缩进行了较系统的研究,并推导出该超滤器放大的适宜计算公式．结果表明：截留分子量１００００ｄ的聚砜不对称膜是适于超滤浓缩灵芝发酵液的超滤膜．适宜的超滤条件为操作压力０．２ＭＰａ,料液温度２０～３０℃,循环速度０．２２ｍ／ｓ;在此条件下超滤２００ｍｉｎ,通量及截留率分别稳定在９．１Ｌ／（ｍ２ｈ）和９６％左右,发酵液聚合物浓缩５倍以上,其收率达９２．６％．     

下期发表论文摘要预报

灵芝真菌发酵生产灵芝多糖和灵芝酸方庆华 ,　钟建江*(华东理工大学生物反应器工程国家重点实验室 ,上海 2 0 0 2 37)　　摘要 :提出了灵芝真菌同时高效生产灵芝多糖和灵芝酸的发酵过程。在摇瓶中考察了氮源、接种量、起始糖浓度和装液量对灵芝细胞生长及灵芝多糖和灵芝酸生产的影响。结果表明酵母膏和蛋白胨复配作为氮源有利于细胞生长。接种量对细胞量有一定影响 ,但是对产物积累量影响更大。在50 g/L起始糖浓度下 ,细胞干重达到 1 6.7g/L,同时胞内多糖、胞外多糖和灵芝酸分别达 1 .1 9g/L,0 .854g/L和 2 1 2 .3mg/L。考察装液量发现 ,…     

灵芝深层培养工艺的研究

为了提高发酵终了时灵芝菌丝浓度以获取高等真菌多糖，对灵芝ＡＳ．５．６５的深层培养工艺进行了研究。确定了最适发酵条件为：５％玉米淀粉、０．３％玉米浆、１％豆饼粉、０．６％糖蜜、０．１５％ＫＨ２ＰＯ４、０．０７５％ＭｇＳＯ４·７Ｈ２Ｏ，ｐＨ５．５～６．０，温度２８℃，摇床转速１５０ｒ／ｍｉｎ，摇瓶种子培养３ｄ接种。接种量５％、装液量５０ｍＬ，培养５～６ｄ可终止发酵。最终菌体干重可达２７．５ｇ／Ｌ、含粗多糖２．６ｇ／Ｌ。     

灵芝功能饮料醋酿制最佳工艺参数的选择

在灵芝培养液中加入适宜浓度的食用酒精，进行生物反应，酿制成具有灵芝保健功能的饮料醋，从自分离出的醋酸菌株中，筛选出生物反应工程菌，研究工程菌、灵芝菌液用量及酒精度等因素水平对最终产品质量与风味的影响。用正交试验结果的直观分析得出最佳工艺参数：工程菌为LEC-2。灵芝菌液用量为30％。酒精度为6％。为生产提供了可行性依据。     

灵芝子实体抗肿瘤成分提取的研究

按表按排正交实验,优化渗漉法提取灵芝中抗肿瘤成分的条件,为灵芝的开发利用提供理论指导,方法乙醇泡后用渗漉法提取有效成分,以渗漉液对ＨｅＬａ细胞的伤害程度作为衡量抗肿瘤成分相对含量的指标。结果灵芝子实体的醇提物在体外具有抑制ＨｅＬａ细胞生长的作用;在影响渗漉条件的４因素中,温度影响最大,渗漉用液量影响最小,结论灵芝子实体中含有抑制ＨｅＬａ细胞生长的成分,以浸泡１ｄ,漉速０．５ｍＬ．ｍｉｎ＾－１,洗脱     

灵芝真菌发酵生产灵芝多糖和灵芝酸

提出了灵芝真菌同时高效生产灵芝多糖和灵芝酸的发酵过程。在摇瓶中考察了氮源、接种量、起始葡萄糖浓度和装液量对灵芝细胞生长及灵芝多糖和灵芝酸生产的影响。结果表明 ,酵母膏和蛋白胨复配作为氮源有利于细胞生长。接种量对细胞量有一定影响 ,但是对产物积累量影响更大。在 50 g/ L起始糖浓度下 ,细胞干重达到 1 6.7g/ L,胞内多糖、胞外多糖和灵芝酸分别达 1 .1 9g/ L,0 .854g/ L和 2 1 2 .3mg/ L。考察装液量发现 ,小装液量有利于提高细胞生长速率和产物的生产速率     

竹镂舟蛾林间防治研究

通过各药剂对竹镂舟蛾幼虫进行林间正交试验设计，结果表明：混合化学药剂林间试验的最优组合为A382C1，即20％杀灭菊酯10000倍液＋0．6％溴氰菊酯3000倍液＋90％敌百虫1000倍液。混合生物药剂最优组合为a1b1c2，即苏云金杆菌2000倍液＋25％灭幼脲3000倍液＋1％阿维菌素10000倍液的组合，这两组药剂可选用于林间对幼虫的防治。林间大面积防治试验结果表明，混合生物药剂a1b1c2的防治效果达94．86％，值得推广应用。     

酚硫酸法测定灵芝多糖的研究

目的：从灵芝中提取多糖，并测定其含量．方法：灵芝多糖的提取一般方法为醇析沉淀法，本实验为找出该方法的最佳工艺条件，结果表明：灵芝多糖提取的最佳工艺条件为：乙醇浓度85％，乙醇：料液为2：1，pH为6．5．结果：用酚-硫酸比色法测定多糖的含量，测得灵芝多糖含量6．55％，平均回收率99．05％，RSD=1．02％（n=3）．结论：该法操作简便，重现性好，实验结果令人满意．     

酸化油固定床酶法合成生物柴油研究

以固定化的假丝酵母酶为催化剂，在三段式固定床反应器内，醇油摩尔比为1：1，采用分级流加甲醇的方式，将高酸值的酸化油转化为生物柴油，探讨了酶量、溶剂量、水量、温度、反应液流速等与产物中甲酯含量的关系。正交实验结果表明，反应的最适条件为酶用量、溶剂量、水量分别为油重的15％、10％、10％，反应液流速为0.8g·min^-1，温度为45℃，在此条件下，产物中甲酯含量达到了90．18％。     

APG磺基琥珀酸单酯盐的合成与性能研究

对ＡＰＧ磺基琥珀酸单酯盐的合成条件进行了探索研究,并测试其性能。结果表明：酯化条件为ＡＰＧ;顺酐（ｍｏｌ）为１∶１．２～１．４,反应温度为７０～８５℃,反应时间为４～６ｈ为宜;磺化反应条件以１０％～２０％的Ｎａ２ＳＯ３水溶液加入,其加入量为加酐量的１．０５倍,反应时间为１．５～２．５ｈ较佳。若酯化反应选一合适的溶剂,则ＡＰＧ：溶剂（ｍｏｌ）为１∶０．６～０．７时,阴离子活性物含量可达７０％以上,测试其性能,表明为比较优良的阴离子表面活性剂,这样就为ＡＰＧ的应用开辟了新途径     

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…     

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。     

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     

《Chinese Science Bulletin》SUBJECT INDEX TO VOLUME 59(2014)

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An on-line scaling method for improving scalability of a database cluster

The explosive growth of the Internet and database applications has driven database to be more scalable and available, and able to support on-line scaling without interrupting service. To support more client's queries without downtime and degrading the response time, more nodes have to be scaled up while the database is running. This paper presents the overview of scalable and available database that satisfies the above characteristics. And we propose a novel on-line scaling method. Our method improves the existing on-line scaling method for fast response time and higher throughputs. Our proposed method reduces unnecessary network use, i.e. , we decrease the number of data copy by reusing the backup data. Also, our on-line scaling operation can be processed parallel by selecting adequate nodes as new node. Our performance study shows that our method results in significant reduction in data copy time.     

An improved R-tree based on childnode''s probability

R-Tree is a good structure for spatial searching. But in this indexing structure,either the sequence of nodes in the same level or sequence of traveling these nodes when queries are made is random. Since the possibility that the object appears in different MBR which have the same parents node is different, if we make the subnode who has the most possibility be traveled first, the time cost will be decreased in most of the cases. In some case, the possibility of a point belong to a rectangle will shows direct proportion with the size of the rectangle. But this conclusion is based on an assumption that the objects are symmetrically distributing in the area and this assumption is not always coming into existence. Now we found a more direct parameter to scale the possibility and made a little change on the structure of R-tree, to increase the possibility of founding the satisfying answer in the front sub trees. We names this structure probability based arranged R-tree (PBAR-tree).     

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.     

Integrating GIS Web services based on mediating architecture

The geographic information service is enabled by the advancements in general Web service technology and the focused efforts of the OGC in defining XML-based Web GIS service. Based on these models, this paper addresses the issue of services chaining,the process of combining or pipelining results from several interoperable GIS Web Services to create a customized solution. This paper presents a mediated chaining architecture in which a specific service takes responsibility for performing the process that describes a service chain. We designed the Spatial Information Process Language (SIPL) for dynamic modeling and describing the service chain, also a prototype of the Spatial Information Process Execution Engine (SIPEE) is implemented for executing processes written in SIPL. Discussion of measures to improve the functionality and performance of such system will be included.