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    • 45. 发明授权
    • Method and apparatus for liquid safety-detection by backscatter with a radiation source
    • 用辐射源通过后向散射进行液体安全检测的方法和装置
    • US07400706B2
    • 2008-07-15
    • US11285395
    • 2005-11-23
    • Yulan LiHaifeng HuYinong LiuZhiqiang ChenKejun KangLi ZhangWanlong WuYuanjing LiYi WangWenjun HeMingrui Qi
    • Yulan LiHaifeng HuYinong LiuZhiqiang ChenKejun KangLi ZhangWanlong WuYuanjing LiYi WangWenjun HeMingrui Qi
    • G01N23/203
    • G01N23/20066G01N23/203G01N2223/637G01V5/0025
    • A method and an apparatus for liquid safety-detection by backscattering with a radiation source are provided that relate to a radiation detecting technology field. The invention comprises using a radiation source, a collimator, a detector, a data collector and a computer data processor, and has the main steps of: 1) placing a liquid article to be detected onto a rotatable platform; 2) emitting a ray from the radiation source, said ray causing Compton scattering at the surface of the liquid after passing through the package layer of the liquid article; 3) the scattering photons being received by the detector after passing the collimator; 4) the detector transmitting the received data to the data collector; and 5) the data collector transmitting the amplified and shaped data to the computer data processor, which processes the data to obtain the liquid density of the detected article, then compares the result with the densities of dangerous articles in a current database, and gives a warning if the density of the detected article is consistent with that of a dangerous article. Compared to the prior art, the invention is convenient to use, detects rapidly and accurately, has a strong anti-interference, is very safe and reliable to use, and protection is easy.
    • 提供了一种与放射线检测技术领域相关的用于利用辐射源的后向散射进行液体安全检测的方法和装置。 本发明包括使用辐射源,准直仪,检测器,数据采集器和计算机数据处理器,并且具有以下主要步骤:1)将要检测的液体物品放置在可旋转平台上; 2)从辐射源发射光线,所述光线在通过液体物品的包装层之后在液体表面引起康普顿散射; 3)散射光子在通过准直仪之后被检测器接收; 4)检测器将接收的数据发送到数据采集器; 5)数据收集器将放大和成形的数据传送到计算机数据处理器,处理数据以获得检测到的物品的液体密度,然后将结果与当前数据库中危险物品的密度进行比较,并给出 如果检测到的物品的密度与危险物品的密度一致,则警告。 与现有技术相比,本发明使用方便,检测快速准确,抗干扰性强,使用安全可靠,保护容易。
    • 48. 发明申请
    • Asymmetric carbon-carbon-bond-forming reactions catalyzed by bifunctional cinchona alkaloids
    • 由双功能甜菜碱生物碱催化的不对称碳 - 碳键形成反应
    • US20070083049A1
    • 2007-04-12
    • US11442742
    • 2006-05-26
    • Li DengHongming LiYi WangFanghui Wu
    • Li DengHongming LiYi WangFanghui Wu
    • C07F9/60C07F7/02C07D453/04C07C45/00C07C253/30C07C67/36
    • C07F9/6561B01J31/0204B01J31/0237B01J31/0244B01J31/0271B01J2231/348C07B2200/07C07C45/69C07C253/30C07C269/06C07C2601/08C07C2601/14C07C2602/08C07C2602/10C07C2602/12C07D453/04C07C255/19C07C255/23C07C255/31C07C255/41C07C255/46C07C255/47C07C271/18C07C271/22
    • One aspect of the present invention relates to quinine-based and quinidine-based catalysts. In certain embodiments, the quinine-based and quinidine-based catalysts contain a hydroxy group at the 6′ position. In certain embodiments, the quinine-based and quinidine-based catalysts contain an O-aryl group or an O-aroyl group at the C9 position. In certain embodiments, the quinine-based and quinidine-based catalysts contain an optionally substituted O-diazene group or an optionally substituted O-benzoyl group at the C9 position. In certain embodiments, the quinine-based and quinidine-based catalysts contain a thiourea at the C9 position. In certain embodiments, the quinine-based and quinidine-based catalysts contain an NH(═S)NH-aryl group at the C9 position. Another aspect of the present invention relates to a method of preparing a chiral, non-racemic compound from a prochiral electron-deficient alkene or prochiral imine, comprising the step of: reacting a prochiral alkene or imine with a nucleophile in the presence of a catalyst; thereby producing a chiral, non-racemic compound; wherein said catalyst is a derivatized quinine or quinidine. In certain embodiments, the nucleophile is a malonate or β-ketoester. In certain embodiments the nucleophile is an alkyl or aryl or aralkyl 2-cyano-2-alkylacetate. In certain embodiments the nucleophile is an alkyl or aryl or aralkyl 2-cyano-2-alkylacetate. Another aspect of the present invention relates to a method of kinetic resolution, comprising the step of: reacting a racemic aldehyde or racemic ketone with a nucleophile in the presence of a derivatized quinine or quinidine, thereby producing a non-racemic, chiral compound. In certain embodiments, the kinetic resolution is dynamic.
    • 本发明的一个方面涉及基于奎宁和奎尼丁的催化剂。 在某些实施方案中,基于奎宁和奎尼丁的催化剂在6'位置含有羟基。 在某些实施方案中,基于奎宁和奎尼丁的催化剂在C 9位含有O-芳基或O-芳酰基。 在某些实施方案中,基于奎宁和奎尼丁的催化剂在C 9位含有任选取代的O-二氮烯基或任选取代的O-苯甲酰基。 在某些实施方案中,基于奎宁和奎尼丁的催化剂在C 9位含有硫脲。 在某些实施方案中,基于奎宁和奎尼丁的催化剂在C 9位含有NH(-S)NH-芳基。 本发明的另一方面涉及从前手性电子缺乏烯烃或前手性亚胺制备手性非外消旋化合物的方法,其包括以下步骤:在催化剂存在下使前手性烯烃或亚胺与亲核试剂反应 ; 从而产生手性,非外消旋化合物; 其中所述催化剂是衍生的奎宁或奎尼丁。 在某些实施方案中,亲核试剂是丙二酸酯或β-酮酯。 在某些实施方案中,亲核试剂是烷基或芳基或2-氰基-2-烷基乙酸烷基酯。 在某些实施方案中,亲核试剂是烷基或芳基或2-氰基-2-烷基乙酸烷基酯。 本发明的另一方面涉及一种动力学拆分方法,其包括以下步骤:在衍生化的奎宁或奎尼丁存在下,使外消旋醛或外消旋酮与亲核试剂反应,从而产生非外消旋的手性化合物。 在某些实施方案中,动力学分辨率是动态的。