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    • 1. 发明授权
    • Mass spectrometry of prostaglandins
    • 前列腺素的质谱
    • US06939718B2
    • 2005-09-06
    • US10044310
    • 2002-01-11
    • Rajendra SinghHalhong Zhou
    • Rajendra SinghHalhong Zhou
    • G01N30/72G01N33/68G01N33/88G01N33/00
    • G01N33/6848G01N30/7266G01N33/88Y10T436/201666Y10T436/24
    • A liquid chromatography-electrospray ionization mass spectrometry method is capable of separating and identifying different prostaglandin isomers, including PGD2 and PGE2. Unlike traditional gas chromatography methods, little sample preparation and no derivatization are required. The chromatography is performed under acidic conditions that are optimal for separating the isomers. A basic sheath flow liquid is added to the chromatographic eluent, resulting in high ionization efficiency when the electrospray ionization is performed in negative ion mode. Additionally, by altering the energy at which the ionization is performed, tandem mass spectra of the two isomers can be made to differ as a result of the different relative energies of the two isomers.
    • 液相色谱 - 电喷雾电离质谱法能够分离和鉴定不同的前列腺素异构体,包括PGD 2和PGE 2。 与传统的气相色谱方法不同,需要很少的样品制备和衍生化。 色谱在酸性条件下进行,最适合分离异构体。 将基本的鞘液液体加入到色谱洗脱液中,当以负离子模式进行电喷雾离子化时,产生高电离效率。 此外,通过改变进行电离的能量,由于两种异构体的不同相对能量,两种异构体的串联质谱可以不同。
    • 8. 发明申请
    • Wireless Communications Apparatus and Methods Employing Opportunistic Frequency Band Use
    • 使用机会频带使用的无线通信设备和方法
    • US20080117871A1
    • 2008-05-22
    • US11938978
    • 2007-11-13
    • George Ronald OlexaRajendra Singh
    • George Ronald OlexaRajendra Singh
    • H04Q7/00
    • H04W72/085H04B7/12H04W52/42
    • A base station selectively communicates with terminals using first and second separately allocated frequency bands, e.g., separate cellular/PCS bands, of a government spectrum allocation based on propagation conditions between the base station and the terminals. The base station may transmit in the first frequency band and receive in the second frequency band during a first time slot and transmit in the second frequency band and receive in the first frequency band during a second time slot. The base station may transmit to a terminal in the first frequency band while receiving from the terminal in the second frequency band during the first time slot and may transmit to the first terminal in the second frequency band while receiving from the first terminal in the first frequency band during the second time slot.
    • 基站基于基站和终端之间的传播条件,选择性地使用第一和第二分开分配的频带(例如单独的蜂窝/ PCS频带)与政府频谱分配进行通信。 基站可以在第一频带中进行发送,并且在第一时隙期间在第二频带中接收并在第二频带中进行发射,并且在第二时隙期间在第一频带中接收。 基站可以在第一时隙期间从第二频带中的终端接收到第一频带中的终端,并且可以在第一频率从第一终端接收时向第二频带中的第一终端发送 在第二时隙期间。