MICROWAVE-ASSISTED EXTRACTION OF CAPSAICINOIDS FROM CAPSICUM FRUIT

The applicability of microwave irradiation to assist the extraction of capsaicinoids from capsicum fruit was investigated. The procedure involved irradiation of 2 g samples in a closed-vessel followed by gas chromatography of capsaicinoid derivatives. The optimum conditions for extraction were determined to be acetone at 30% power for 7 min irrespective of ground or whole tissue.
The yield of the compounds extracted was significantly greater (P < 0.05) using microwave-assisted extraction (MAE) compared to traditional reflux and shaken flask methods. A single extraction step was efficient in recovering approximately 95% of the total capsaicinoid fraction in 15 min compared with 2 h for the reflux and 24 h for the shaken flask methods. Due to the considerable savings in time and energy as well as reliability, this technique is suitable for fast extraction of capsaicinoids from large samples.     

电流变体特性及电流变体应用器件的进展

本文详细评述了电流变体(ERF)材料的组成、工作机理及其流变力学性能,提出以Bingham塑性体来近似描述电流变体的流变特性,综述了电流变体在智能材料、汽车离合器、液压阀门等器件中的应用,给出了含电流变体的双层智能复合材料梁单层、双层加电状态对其振动特性的影响,设计了含电流变体的主动控制式减振器,并对其在外加电场作用下的减振性能进行了评价。     

采用奇异值分解设计广义系统的最优滤波器

本文讨论广义离散随机线性系统的状态估计问题，通过矩阵奇值分解，本文给出了一种设计降阶最优滤波器的实用方法，该方法同时还得到了动态系统和量测系统的干扰噪声的估计。     

中国第一口超千米深水钻井液技术

LW3-1-1探井位于中国南海珠江口盆地，作业水深1480m，完钻井深为3843m，地层以大套灰色泥岩和页岩为主，具有强水敏性．要求钻井液具有良好的流变性、润滑性、抑制性，良好的抗盐、抗钙、抗高温和抗低温能力，以及强的天然气水合物抑制能力。该井采用了PFMX钻井液体系，钻井周期为49d，介绍了钻井液工艺及现场应用情况。PFMX体系表现出很多油基钻井液的优点，如好的润滑性、高的钻进速率、膜效应、强的井眼稳定及页岩抑制性，解决了强水敏性地层的井壁稳定等问题，还解决了深水钻井中遇到的挑战，如低的破裂压力梯度、天然气永合物、浅层水流、深水低温等问题，满足了该区块作业需要。     

汽车组合仪表板控制系统设计

介绍了以PIC16F873单片机为控制核心的汽车组合仪表板控制系统的设计,简述了汽车组合仪表板的基本构成,介绍了汽车组合仪表板控制系统的组成和各部分功能,给出了数据采集处理电路、电源电路等部分硬件电路设计方案,并阐述了一些软件设计算法,如分段插补法和用于平滑指针的软件设计算法等。     

Luminescent Efficiency in Single-layer Organic Electrophosphorescent Devices

Based on the charge injection and recombination processes and the triplet-triplet annihilation process, a model to calculate the electro.luminescent（EL） efficiency is presented. The influences of the applied electric field on the injection efficiency, recombination efficiency and electroluminescent efficiency are discussed. It is found that： （1） The injection efficiency is increasing while the recombination efficiency is decreasing with the applied electric field increasing. （2） The EL efficiency is enhanced at low electric field slowly but is decreasing at high electric field with the increase of applied voltage. （3） The EL efficiency is decreasing with the increase of the host-guest molecular distance （R）. So, it is concluded that the EL efficiency in single-layer organic electrophosphorescent devices is dominated by injection efficiency at lower electric field and recombination efficiency at higher electric field.     

可燃气体检测报警系统的分析和检修

分析可燃气体检测报警系统的组成和检修方法，并列举了根据故障现象进行分析和检修的实例。     

苏州现代物流园综合办公大楼解读

文章通过对澳大利亚的JPW建筑设计公司在苏州工业园区设计并建成的物流园综合办公大楼进行介绍和解读，试图让更多的人了解该建筑，并发现其设计中的趣味。     

浅议高校校园中水回用工艺

分析了高校校园中水回用的必要性,对位于市区和郊区新建高校提出了有针对性的校园中水回用工艺,并对中水回用项目的效益进行了探讨.