菌肥用光合菌在纤维素水解液中的培养

对光合菌在天然培养基、合成培养基以及来自植物纤维素水解液的半合成培养基中的培养进行了研究 ,对适宜的培养基、营养物质的稀释度、菌种接种量、pH值等进行了选择 .对选出的 4号加有纤维素水解液的培养基 ,接入 5 %的菌液 ,pH为 7.0～ 7.5 ,温度为 2 5～ 30℃ ,厌氧条件下 ,光合菌生长良好 ,菌量达 2 .2× 10 9亿个/mL ,在加入光合菌生长促进液 (1% )后 ,菌量达 4.0 1× 10 9个 /mL .     

液态发酵细脚拟青霉培养基及其发酵条件的优化

对细脚拟青霉进行液态培养,采用单因素实验和正交实验对培养基及培养条件进行优化.结果表明,培养基组成为:4％葡萄糖,2％蚕蛹粉,0.15％ KH2PO4,0.15％MgSO4·7H2O;培养条件为:接种量5％,温度25℃,初始pH值6.5,摇床转速140 r/min,250 mL三角烧瓶中装液量为80 mL.细脚拟青霉的菌丝生物量优化后产量提高了18.9％.     

苏云金芽孢杆菌MS7培养条件的优化

通过单因子试验对苏云金芽孢杆菌MS7菌株的培养条件进行优化．研究表明,该菌株的最佳培养基组成和发酵条件为：蔗糖10．0g／L、牛肉膏10．0g／L、K2HPO42．0g／L,初始发酵pH7．0,装液量25mL,培养温度35℃,培养时间36h,优化后细菌总数可达1．2×10^8CFU／mL．     

锰细菌氧化锰的影响因素研究

研究了锰细菌Arthrobacter sp. MN1405的生长、氧化曲线及影响其氧化锰的各种理化因素.结果表明:接种量、装液量、温度、pH、Mn2+质量浓度、Fe2+质量浓度、摇床转速等因素对锰氧化率有不同程度的影响.在培养基装液量为250mL的三角瓶装80mL,初始Mn2+质量浓度65mg/L,温度25℃,pH6.8,接种量6%,120r/min的条件下培养6d后,锰的总氧化率可达80%以上.     

活性干酵母富硒培养条件的研究

以安琪活性干酵母为出发菌种,分析了培养基初始硒浓度、接种量、装液量、温度、初始pH以及转速等发酵条件对酵母生物量及富硒量的影响,并通过正交试验设计初步确定了培养的最优方案.在最佳的摇瓶培养条件下(初始硒浓度25μg/mL,接种量10%,装液量60/250 mL,温度30℃,初始pH 5.0,摇床转速160 r/min,培养40 h后),该活性干酵母的生物量及富硒量分别达到9.89 g/L、954 μg/g.     

金针菇液体发酵培养工艺的优化研究

为了分析不同营养成分及培养条件对金针菇菌丝体生物量的影响及为金针菇液体发酵工业化生产提供参考依据,采用单因子及正交试验,分别测定不同培养基组合及培养条件下的金针菇菌丝体生物量．研究结果表明,金针菇液体发酵培养基的最优组合为：40g／L黄豆粉、20g/L可溶性淀粉、2g/L KH2PO4和1g／L MgSO4·7H2O．最优培养条件是：起始pH值6．0、接种量200mL／L、装液量400mL／L、摇床转速160r／min、培养温度25℃和恒温培养8d．     

灰树花液体培养工艺的研究

对灰树花液体培养工艺进行了系统的研究.通过单因子试验优化筛选了适于灰树花的液体培养基和摇瓶培养条件,结果表明,适宜的培养基组成为:玉米粉50g/L、皮20g/L、KH2PO41g/L、MgSO40.5g/L、VB10.01g/L.最适摇瓶培养条件为:培养温度25℃、摇床转速160r/min、pH值6.0、接种量10%、装液量120ml/500ml、培养时间6d、最高菌丝体干重达16.8g/L.     

门多萨假单胞菌DS04-T对Poly(3HB-co-4HB)的降解研究

考察了门多萨假单胞菌DS04-T对Poly(3HB-co-4HB)的降解行为。以Poly(3HB-co-4HB)为唯一碳源,分别考察培养时间、培养温度、摇床转速、装液量、培养基起始pH值、接种量等因素对降解行为的影响。结合正交试验优化获得了菌株的最佳产酶条件:培养时间为28h,培养温度为30℃,培养基初始pH值为7.3,摇床转速为150r/min,培养基装液量为120mL(250mL三角瓶),接种量为1.5%(体积分数),此条件下菌株对Poly(3HB-co-4HB)的降解酶活力可达(26.2±0.7)U.mL-1。     

多粘类芽孢杆菌培养条件优化研究

对多粘类芽孢杆菌菌株B-306的培养基配方及培养条件进行优化研究,优化后的多粘类芽孢杆菌B-306培养基配方及培养条件为:可溶性淀粉17.5 g·L-1、蛋白胨25.0 g·L-1、NaCl 1.25 g·L-1、Na2HPO40.5g·L-1、CaCl21.0 g·L-1,pH7.5;培养温度30℃、转速170 r·min-1、装液量80 mL/250 mL;接种量为10%(体积分数).经过以上条件优化,多粘类芽孢杆菌B-306的细胞生物量可达5.3×109cfu·mL-1,比优化前(3.17×108cfu·mL-1)提高了15.72倍.     

粘盖牛肝菌菌丝发酵养条件研究

研究了武陵山粘盖牛肝菌菌丝体的液体培养基和培养条件.结果显示,粘盖牛肝菌菌丝体液体发酵的最适培养基为:玉米粉4.0%,麸皮5.0%,磷酸二氢钾0.10%,硫酸镁0.05%;最适培养条件为:培养液pH 6.0,装液量75 mL.250 mL-1三角瓶,接种量9.0%,培养温度28℃,摇床转速170 r.min-1,培养时间6 d.在此培养条件下,粘盖牛肝菌菌丝体生长好,菌丝体产量达到(0.414 8±0.009 0)g.l00 mL-1.     

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).     

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.     

Tracking data management using topology of moving object database system for moving object constrained trajectory in LBS application

Advances in wireless technologies and positioning technologies and spread of wireless devices, an interest in LBS (Location Based Service) is arising. To provide location based service, tracking data should have been stored in moving object database management system (called MODBMS) with proper policies and managed efficiently. So the methods which acquire the location information at regular time intervals then, store and manage have been studied. In this paper, we suggest tracking data management techniques using topology that is corresponding to the moving path of moving object. In our techniques, we update the MODBMS when moving object arrived at a street intersection or a curved road which is represented as the node in topology and predict the location at past and future with attribute of topology and linear function. In this technique, location data that are corresponding to the node in topology are stored, thus reduce the number of update and amount of data. Also in case predicting the location,because topology are used as well as existing location information, accuracy for prediction is increased than applying linear function or spline function.