脈沖 impulse; pulse; impulsion; out-burst; pip (熒光屏上的) 一個光脈沖 a pulse of light; 一個聲脈沖 a pulse of sound; 一個壓力脈沖 a pulse of pressure; 在低頻率(譬如每秒十次)時, 所感覺到的是脈沖而非振動。 at low frequencies, such as 10 per sec., pulsation is sensed rather than vibration
The electrochemical study showed that the interaction mode is mainly intercalative binding in ph 7 . 4 phosphate buffer solution . the uv - vis spectroscopic study further demonstrated the above results . through the electrochemical parameters such as charge transfer coefficient and standard electron transfer rate constant ks in the absence and presence dna , it was found that the reaction of aloe - emodin with dna forms an electrochemical active supramolecular complex 本文對姜黃素的研究結(jié)果表明,在0 . 1m磷酸鹽緩沖液( ph3 . 0 )中,姜黃素于玻碳電極上存在可逆的單電子轉(zhuǎn)移過程,據(jù)此,本文建立了以差示脈沖伏安掃描法檢測姜黃素含量的新方法。
Abstract : the determination of aminoglycoside antibiotics in the biological fluid has been reviewed . the methods mainly included bioassay , thin - layer chromatography , high - performance liquid chromatography ( hplc ) and a variety of immunoassay ( ia ) , for example , enzyme immunoassay , fluorescence polarization immunoassay , quenching fluorescence immunoassay , chemiluminescent immunoassay , etc . , in which hplc and ia were used more often 文摘:綜述了氨基糖苷類抗生素的體內(nèi)分析方法.主要有:生物學分析法;薄層色譜法;高效液相色譜法;差示脈沖極譜及各種免疫法,如酶免疫法,熒光偏振免疫法,膠乳凝集抑制速率比濁法等.其中高效液相色譜法和免疫法應(yīng)用較多