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多功能物理演示实验室的构建 总被引:1,自引:0,他引:1
本文结合东华理工大学物理演示实验室的建设实践,分析了物理演示实验室的教学辅助、科普教育和创新实践等教育功能,并提出了建设多功能物理演示实验室的思路。 相似文献
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This paper shows how the Steiner selection has very nice properties in view of differentiability, measurability, and integrability of multi-functions. 相似文献
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陈国荣 《宁波大学学报(理工版)》1998,(3)
针对岸边集装箱起重机原多功能液压系统的控制软件在满足装卸生产要求上存在的问题,根据实际装卸要求,在分析原多功能液压系统工作原理的基础上,重新确定了控制系统的技术要求,编制了相应的控制程序,经改进,系统队使用时,对位置不准的集装箱平均吊运时间由8.6min减少到3.0min,提高平均装卸效率30%。 相似文献
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多重机制杂质吸附萃取净化-快速液相色谱-串联质谱法测定鱼组织中11种同化激素 总被引:1,自引:0,他引:1
建立了准确、灵敏的鱼组织中11种同化激素(勃地酮、雄烯二酮、诺龙、美雄酮、甲睾酮、睾酮、醋酸睾酮、群勃龙、丙酸睾酮、康力龙、氟甲睾酮)的多重机制杂质吸附萃取净化-快速液相色谱-串联质谱的分析方法。鱼组织均质样品经甲醇提取后,在上清液中加入一定量的C18固体吸附剂、中性氧化铝吸附剂和氨基功能化纳米吸附剂实现快速净化。采用Shim-Pack XR-ODSII色谱柱(100 mm×2.0 mm, 2.2 μm)分离,以乙腈(含0.1%甲酸)和水(含0.1%甲酸)为流动相进行梯度洗脱,电喷雾正离子多反应监测(MRM)模式下检测,外标法定量。结果表明,11种目标化合物在线性范围内具有良好的线性关系,相关系数大于0.999,其在鱼组织中的检出限(S/N>3)为0.03~0.4 μg/kg,定量限(S/N>10)为0.1~1.5 μg/kg,平均回收率为80.9%~98.1%,相对标准偏差(RSD)为5.2%~11.5%。该方法简便、快速、准确,可用于鱼组织中同化激素的定性、定量监测。 相似文献
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Angela Paicu 《Journal of Mathematical Analysis and Applications》2008,337(2):1238-1248
Let X be a real Banach space, an m-accretive operator and a multi-function which is 2π-periodic with respect to its first argument, has nonempty, closed, convex and weakly compact values and is strongly-weakly upper semicontinuous. In this paper we prove the existence of at least one solution for the problem
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针对特殊环境下光学系统的需求,设计了一种具有三层结构的新型光学耐压保护窗口,其外层为石英玻璃,内层为开有小孔的化学钢化K9玻璃,中间为夹有电阻丝的PVB(聚乙烯醇缩丁醛)胶层,电阻丝通过内层玻璃上的小孔引出。通过强度仿真优化得出了内层玻璃最佳开孔位置和孔直径,设计了这种三层结构的保护窗口的工艺流程,并对具有三层结构的保护窗口进行了性能测试和验证。结果表明,这种新型耐压窗口集成了透光、耐压、抗冲击、加热、表面快速脱水等功能。 相似文献
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Hiroyuki Tsuda Katsumi Fukamachi Jiegou Xu Kazunori Sekine Shigetoshi Ohkubo Nobuo Takasuka Masaaki Iigo 《Proceedings of the Japan Academy. Series B, Physical and biological sciences》2006,82(7):208-215
Increasing attention is being paid to chemopreventive agents for individuals at high risk of cancer. We have concentrated on bovine lactoferrin (bLF), an 80 kDa iron-binding glycoprotein known to have anti-microbial and immunoprotective effects. Lactoferrin is particularly abundant in colostrum, and is also present in tears, saliva and seminal and uterine secretions. However, only little is known regarding its influence on carcinogenesis. We have shown preventive effects of bLF and its fragment peptide, lactoferricin (bLFcin), consisting of a 25 amino acid sequence without iron binding capacity, on chemically-induced colon carcinogenesis in the rat and transplanted carcinoma cell metastasis in the mouse. The mechanisms are wide-spectrum, including elevation of caspase-1 and IL-18 in the small intestine, enhancement of the cell killing activity of cytotoxic T and natural killer (NK) cells, and anti-inflammatory and anti-angiogenic effects. It also inhibits the induction of liver CYP1A2, a carcinogen activating enzyme, and induces apoptosis in the colon epithelium of carcinogen treated rats. Thus, bLF possesses multi-functional potential to suppress carcinogenesis and is a good candidate for practical application in humans. 相似文献
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