The chemical constituents from fruits and seeds of Ligustrum lucidum Ait.

【英文摘要】 The chemical constituents from fruits and seeds of Ligustrum lucidum Ait. were determined. The content of fatty oil in the seeds reached 14.70%. The main constituents of fatty acid were: oleic acid (44.37%), linoleic acid (40.378%), linolenic acid (0.867%),palmitic acid (4.525%),stearic acid (1.843%) etc,and the contents of unsaturated fatty acid reached 88.184%, the seed oil was of higher nutrient value. The contents of amino acids and mineral elements were relatively abundant. The content of total sugar...福建省教育委员会基金资助项目 (K20096 );福建省自然科学基金资助项目 (No C9910001

2018年安溪珠塔内窑调查报告

2018年5月至7月,厦门大学历史系考古专业、福建博物院文物考古研究所及安溪县博物馆等单位联合组成\"安溪古窑址调查队\",对安溪珠塔内窑进行了全面的调查,基本了解珠塔内窑古窑址分布与保存情况,采集了一批明末清初的青花瓷器、白瓷与窑具标本,并发现部分窑炉遗迹,为研究闽南地区青花瓷窑业发展提供了第一手资料

Species composition and ecological distribution of planktonic diatoms in the Changjiang River estuary during Spring

20 0 2年春季 ,在长江口附近海域典型赤潮高发区 2 8个大面站位采集了 5 3个样品 ,从中共鉴定出隶属于 31个硅藻属的 80个种和变种 ;其中种类多样性较高的属为圆筛藻属 (Coscinodiscus) ,有 17个种 ,斜纹藻属 (Pleurosigma) ,有 8个种和变种 ;数量上较优势的种为柔弱拟菱形藻 (Pseudo nitzschiadeli catissma) ,为 3.4 8× 10 3 cells·L-1,占 2 8.5 4 % ;具槽直链藻 (Melosirasulcata) ,为 1.4 3× 10 3 cells·L-1,占16 .98% ;尖刺拟菱形藻 (Pseudo nitzschiapungens) ,为 0 .71× 10 3 cells·L-1,占 9.85 % .它们在大部分站位中都有出现 ;柔弱拟菱形藻和尖刺拟菱形藻的高细胞密度区主要出现在 12 30E断面的站位 ,而具槽直链藻则主要出现在长江口的 31～ 32°N断面的站位 .浮游硅藻总细胞丰度变化于 0 .4 3× 10 3 ～ 2 3.3× 10 3 cells·L-1,平均 4 .6 1× 10 3 c... 【英文摘要】 water samples were collected from 28 stations in typical regions where redtide frequently occurred in the Changjiang River estuary during Spring, 2002. In total, 80 diatom species and varieties belonging to 31 genera were identified, among which, genera with high species biodiversity included Coscinodiscus which contained 17 species and Pleurosigma which contained 8 species and varieties. Quantitative analysis of diatom cell density showed that Pseudo-nitzschia delicatissma (3.48×10 3cells·L -1, 28.54%...国家重点基础研究发展规划资助项目 ( 2 0 0 1CB40 970 1)

3D-printed integrative probeheads for magnetic resonance

射频探头前端作为核磁共振设备的核心部件之一，极大程度的决定着系统实验性能的优劣。探头前端通常由射频线圈、射频电路及样品检测管道等部分组成。现有的射频线圈制作技术主要是通过手工或机械手段按照所需的线圈形状进行绕制。但是，当线圈结构较为复杂、不规则，或体积尺寸较小时，常规绕制方法便难以满足结构设计和制造的精度需求，因此造成线圈性能的劣化，增大检测区域的射频场不均匀性，对核磁共振检测产生负面影响。本研究中，利用3D打印熔融沉积制造或光敏树脂选择性固化技术精确加工出一体化磁共振探头前端，使用常温液态金属填充线圈模型管路形成射频线圈，搭建出稳定的一体化磁共振射频探头。利用高精度3D打印和液态金属灌注技术制备出包含有射频线圈和定制化样品管道结构在内的一体化磁共振射频探头前端，克服了传统磁共振三维微型线圈成型困难、与样品腔匹配程度差等问题，提高了探头的信噪比，为定制化的磁共振检测提供了新思路。 该工作由厦门大学电子科学与技术学院陈忠教授、游学秋副研究员和孙惠军高级工程师共同指导完成，博士研究生谢君尧为论文第一作者。厦门大学电子科学与技术学院黄玉清高级工程师、王忻昌副教授、倪祖荣助理教授、硕士研究生张德超，化学化工学院杨朝勇教授、博士研究生李星锐，萨本栋微米纳米科学技术研究院陈宏教授为合作作者。【Abstract】Magnetic resonance (MR) technology has been widely employed in scientific research, clinical diagnosis and geological survey. However, the fabrication of MR radio frequency probeheads still face difficulties in integration, customization and miniaturization. Here, we utilized 3D printing and liquid metal filling techniques to fabricate integrative radio frequency probeheads for MR experiments. The 3D-printed probehead with micrometer precision generally consists of liquid metal coils, customized sample chambers and radio frequency circuit interfaces. We screened different 3D printing materials and optimized the liquid metals by incorporating metal microparticles. The 3D-printed probeheads are capable of performing both routine and nonconventional MR experiments, including in situ electrochemical analysis, in situ reaction monitoring with continues-flow paramagnetic particles and ions separation, and small-sample MR imaging. Due to the flexibility and accuracy of 3D printing techniques, we can accurately obtain complicated coil geometries at the micrometer scale, shortening the fabrication timescale and extending the application scenarios.The work is supported by the National Natural Science Foundation of China (Grants U1632274, 11761141010, U1805261, 11475142, 22073078, and 61801411), and China Postdoctoral Science Foundation (2017M622075).研究工作得到国家自然科学基金、中国博士后科学基金等项目支持