超临界CO2萃取与同时蒸馏萃取法提取澳洲坚果花挥发性成分研究

分析研究澳洲坚果花挥发性成分含量,探讨不同提取方法提取坚果花中的挥发性成分的差异.采用气相色谱-质谱联用技术(GC-MS)分析鉴定超临界CO2萃取与同时蒸馏萃取法分别提取的坚果花挥发性成分,用峰面积归一法计算各个组分相对含量.从超临界CO2萃取物中分离出164个组分,鉴定出58种成分,占化合物检出总量的85.55%.含量最高为亚麻酸(11.88%);从同时蒸馏萃取物中分离出142种成分,鉴定出53种成分,占化合物检出总量的71.06%.最主要成分为环氧芳樟醇(10.89%).不同提取方法提取的挥发性成分的组成和相对含量存在明显不同.通过对澳洲坚果花挥发性成分的研究,为澳洲坚果资源进一步开发利用提供了依据.     

GC-MS法测定芜菁子中油脂组成研究

目的:分析测定芜菁子中油脂的组成。方法:采用索氏提取法提取芜菁子中的油脂,甲酯化后,气相色谱-质谱法分析其油脂中脂肪酸的成分。结果:芜菁子中含有油酸,亚油酸,亚麻酸,硬脂酸,软脂酸,芥酸6种脂肪酸,其含量分别为12.5%、19.6%、8.9%、7.4%、5.8%、18.2%。结论:该法操作简便,灵敏度高,准确可靠,可用于芜菁子油中脂肪酸的组成及含量测定。     

红松松针精油脂肪酸GC-MS分析

用索氏提取器提取红松松针精油,将提取物的油脂甲脂化后利用气相色谱-质谱联用技术(GC-MS)进行分离和鉴定.结果表明:红松松针精油含有丰富的饱和脂肪酸和不饱和脂肪酸,饱和脂肪酸质量分数占总脂肪酸质量分数的74.32%,不饱和脂肪酸占25.68%;鉴定出31种脂肪酸,相对质量分数比较高的是棕榈酸(26.86%)、月桂酸(25.05%)、肉豆蔻酸(6.33%)、芥子酸(5.98%)、二十二碳六烯酸(DHA)(5.4%)、硬脂酸(4.38%),γ-亚麻酸和亚油酸分别是1.55%和2.18%,α-亚麻酸未检出.     

杏鲍菇子实体和大麦粒菌丝体脂肪酸组成分析

采用气相色谱法分析了杏鲍菇子实体和大麦粒菌丝体的脂肪酸组成.其主要脂肪酸成分软脂酸、亚油酸和γ亚麻酸,在子实体和大麦粒菌丝体中分别占13 14%、22 40%;60 09%、43 01%和21 14%、10 67%.其中多不饱和脂肪酸亚油酸占优,且杏鲍菇子实体和大麦粒菌丝体中含有较高比例含量的γ亚麻酸.     

大戟科假奓包叶的种子油提取及油脂肪酸成分

利用超声波辅助提取法萃取吉首市郊区4个采样点的大戟科植物假奓包叶的种子油,并采用气相色谱-质谱（GC-MS）联用技术分析了种子油脂肪酸组成。结果表明,4个采样点的假奓包叶种子油提取率平均为22.71%,种子油的脂肪酸成分分别为8,7,5, 4种;各采样点植物假奓包叶的种子油共有的、相对含量较高的脂肪酸成分为亚麻酸（52.38%）、亚油酸（28.18%）、硬脂酸（13.30%）和棕榈酸（5.78%）,其总量占总脂肪酸的99.47%.     

卵盘鹤虱籽油中脂肪酸组成测定

采用毛细管柱气相色谱法测定了卵盘鹤虱籽油中的脂肪酸组成及相对含量,鉴定了１３种脂肪酸,占脂肪酸总量的９８．６６％,样品所含主要脂肪酸为棕榈酸、油酸、亚油酸、α－亚麻酸和γ－亚麻酸。不饱和脂肪酸为９０．５７％,其中α－亚麻酸３６．１８％,γ－亚麻酸５．８６％,并进一步采用气相色谱法－－质谱联用方法对卵盘鹤虱籽油中脂肪酸组分定性。     

大戟科假奓包叶的种子油提取及油脂肪酸成分

利用超声波辅助提取法萃取吉首市郊区4个采样点的大戟科植物假奓包叶的种子油,并采用气相色谱-质谱（GC-MS）联用技术分析了种子油脂肪酸组成。结果表明,4个采样点的假奓包叶种子油提取率平均为22.71%,种子油的脂肪酸成分分别为8,7,5, 4种;各采样点植物假奓包叶的种子油共有的、相对含量较高的脂肪酸成分为亚麻酸（52.38%）、亚油酸（28.18%）、硬脂酸（13.30%）和棕榈酸（5.78%）,其总量占总脂肪酸的99.47%.     

海带脂肪酸的提取及其成分分析

以海带为原料,采用索氏提取器对海带脂肪酸进行提取研究,并应用GC-MS技术对海带脂肪酸成分进行分析.结果表明,选择石油醚为提取溶剂,在提取温度为70℃、提取时间为6h、原料粒度为180~200目时,最有利于海带脂质的提取,经鉴定,此条件下可提取出9种脂肪酸成分,脂肪酸相对质量含量为89.45%,其中多不饱和脂肪酸占脂肪酸总量的23.13%.     

一株高效产油脂真菌的选育及其油脂成分分析

以早期从海洋环境中分离得到的38株海洋真菌为材料,采用苏丹黑染色法初筛,摇瓶法复筛,得到1株油脂产率相对较高(27.96%)的菌株MD2,经鉴定,该菌株为粘红酵母(Rhodotorula glutinis).再以MD2为出发菌株,经紫外诱变、亚硝基胍诱变和紫外-亚硝基胍复合诱变,最终得到突变菌株MD2-1;采用酸热法提取粘红酵母MD2-1的菌体油脂,测定了其产脂能力,并采用气相色谱-质谱联用法(GC-MS)测定其脂肪酸组成.结果表明:MD2-1的产脂能力较强,油脂质量达菌体干质量的45.32%,较MD2提高17.36%;MD2-1菌体油脂中检测出9种脂肪酸,其脂肪酸组成与植物油近似,其中10-十八(碳)烯酸占脂肪酸总量的71.53%,为10-十八(碳)烯酸工业化生产提供菌种资源,为其规模化生产奠定基础.     

月见草油微胶囊技术的研究

研究了以含γ-亚麻酸等多种不饱和脂肪酸油脂的月见草油为芯材的微胶囊制备的工艺过程和生产条件．对影响工艺及产品性能的因素进行了必要的探索，结果表明：2％的阿拉伯胶和2％的明胶混合组成混合液，月见草油与混合液以1：4（芯材占物料总量为20％）混合，在pH7．00，80℃下乳化2min，在pH4．00～4．50时凝聚0.5h，4℃固化1．5h，经离心干燥后制备的微胶囊包埋率和油脂得率最好．     

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.