不同方法提取的菘蓝种子油的GC-MS分析

分别采用室温浸提法、超声提取法和索氏提取法制备菘蓝种子油,并结合GC - MS技术分析3种方法所得种子油的脂肪酸组成及含量变化.结果表明:索氏提取法所得种子油得率最高;3种 方法对菘蓝种子油脂肪酸组成无明显影响;超声提取法具有提取时间短、提取效率高等特点,可以作为制备菘蓝种子油的理想选择.     

军事运作角度下的“军事工程”类遗址的真实性与完整性构建

本文从＂军事工程＂类遗址自身的功能特征出发,指出军事运作的视角是认知此类遗址的有效途径。并以全国重点文物保护单位——营口西炮台遗址的保护为例,具体阐述基于军事运作角度的保护规划编制和构建文物真实性与完整性的操作模式。     

三明市尤溪县茂荆堡的空间形态研究

随着福建土楼被列入"世界文化遗产",人们开始关注集中在闽中地区的福建土堡,据初步考察,一些地方的文博工作者认为土堡堪称"土楼之母"。福建土堡具有独特的空间形态、精湛的建筑技艺和深厚的文化底蕴。本文选择尤溪县茂荆堡作为个案研究对象,对其进行了详细的测绘,结合文献研究和实态访谈,分别从茂荆堡的自然环境、建筑空间和传统文化等方面进行深入研究,展示出与福建土楼完全不同的一种更为古老的防御性传统民居类型。     

The Ridiculous and the Sublime

Ben Nicholson 's classic satire The World Who Wants It? was written at the beginning of this decade in the wake of 9/11. Here Nicholson revisits the work, presenting new drawings and rethinking the themes in light of the second major hit that the world has taken with the banking crisis of 2008 and the accompanying economic downturn. Copyright © 2009 John Wiley & Sons, Ltd.     

福建土堡的保护与利用研究综述

福建土堡是在福建山区土生土长、独一无二的一种防御性民居,具有构筑奇特、防御性强及文化内涵丰富等特点。目前为止,福建土堡的保护与利用现状令人堪忧,本文从福建土堡的研究、保护与利用概况三方面进行现有研究成果的综述,并且在研究对象、研究框架和研究方法上提出福建土堡保护与利用研究更深层次的前景展望。     

Electrochemical reduction of ammonium 5-bromo-2′-deoxyuridine-5′-methylphosphonate: an inhibitor of cell growth

The electrochemical reduction of a cell growth inhibitor, ammonium 5-bromo-2′deoxyuridine-5′-methylphosphate (BrdUrdOPO₂Me), was investigated in order to compare its electrochemical properties with those of 5-bromo-2′-deoxyuridine (BrdUrd) and of 5-bromo-2′-deoxyuridine-5′-phosphate (BrdUMP). The derivatives f BrdUrd differ markedly in their electrochemical behavior from BrdUrd because of the influence of the methylphosphonate or phosphate groups. Current vs pH plots for BrdUrdOPO₂Me and BrdUMP decrease in the form of an acid dissociation curve and assume kinetic behaviour at high pH values. Controlled potential electrolysis at a stirred mercury cathode of BrdUrdOPO₂Me requires two electrons per mole. Autoradiochromatographic analysis of the electrolytic product of the tritium labeled ammoniumbromodeoxyuridine-5′-methyl[³H]phosphate shows that the methylphosphonate group remains intact during the course of the electrolysis. Electrolysis results in debromination and the product exhibits an uv spectrum identical to a 2′-deoxyuridine derivative.     

Distribution of organic carbon in tropical mangrove sediments (Cochin,India)

Surficial sediments were sampled every month from three mangrove regions around the metropolis of Cochin (India). Sedimentary organic carbon content exhibited wide seasonal fluctuations. The hydrology of the mangrove system is regulated mainly by high rainfall during the monsoon and by tidal inundation. The results indicated the role of tidal activity and sediment texture in the preservation and retention of organic matter.     

类型联合——简评福特韦恩艺术中心

本文通过对路易斯·I·康职业生涯后期的重要作品之——福特韦恩艺术中心的简要分析,阐述了康的理想集会建筑走向联合的事实,并就这种联合在技术上的可操作性及其对城市的影响进行了初步的说明。福特韦恩艺术中心可以被看作康后期探索的重要一环,它的问题和方法为现代建筑发展中通用空间和场所矛盾的调和提供了重要参考。     

A digital image system for atmospheric research

This paper describes the architecture of a medium scale digital image processing system developed as a research tool for analysis of meteorological data. The system is also being used for research on efficient image processing systems. Four qualitative performance measures for any image processor are introduced with specific application to the present machine. Preliminary results with noise reduction algorithms in satellite data are presented. Lastly, the versatility of the machine as a test bed for architectural studies of the computational structure of image processors with a microprogrammable control unit is discussed.     

Training learning strategies with computer-aided cooperative learning

This paper describes the combination of two potent training technologies (computer-based instruction and cooperative learning) into a system called computer-aided cooperative learning (CACL) and the use of CACL to train students in a general learning strategy. This six-steps strategy involves setting a task-appropriate mood, reading for general understanding, recall as much of the material as possible, detecting errors and omissions, elaborating upon the material to make it more memorable and reviewing. CACL capitalizes on the strengths and overcomes some of the weaknesses of each of the constituent technologies. The resulting program is described and some data demonstrating its effectiveness is presented. Students using CACL recalled more material from each of two passages studied individually than did students who did not use CACL. CACL appears to be a promising technology for the delivery of learning strategies. Future research and development efforts should examine CACL's usefulness to the training of more sophisticated learning strategies.