Jing-yan Liu

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A simple, rapid and accurate high-performance liquid chromatographic (HPLC) technique coupled with photodiode array (PDA) detection was developed for the simultaneous determination of noradrenaline (NA) and dopamine (DA) in Chinese herbal plant extracts from the different parts of Portulaca oleracea L. The effects of various parameters, such as sodium(More)
Neopanaxadiol (NPD), a major ginsenoside in Panax ginseng C. A. Meyer (Araliaceae), was reported to have neuroprotective effect. In this study, a method of ultra-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UPLC/QTOF-MS) was developed and validated for quantitative analysis of NPD in tissues, urine and feces, using(More)
Based on the BP neural network, this paper sets up the model of cost estimation of highway engineering. The BP neural network model is trained by a sample data obtained from some performed typical engineering to come true quick cost-estimating.It is sure that the method is practical and the estimating results are reliable according to lots of examples.It(More)
OBJECTIVE To optimize the method for preparation of the insulin-like growth factor I (IGF-I ) in deer antler, and to determine the IGF-I in deer antler, heart and blood. METHODS Ultrasonic extraction was used to extract IGF-I from different tissues of deer with ammonia-ammonium acetate buffer, followed by ultrafiltration and solid phase extraction to(More)
OBJECTIVE To investigate the influential factors for the prognosis in patients with paraquat poisoning. METHODS Retrospective analysis was performed on 40 patients with acute paraquat poisoning to evaluate serum urea nitrogen, creatinine, alanine aminotransferase, and aspartate aminotransferase levels and organ injuries. RESULTS Among the patients, 21(More)
The present paper introduced the principle of clustering of variables around latent components method, and used this method in selecting spectrum range of the NIR quantitative analysis models. Taking tobacco samples as experiment materials, we dealed with 107 sample spectra, divided the spectra into 5 clusters, and explained the information reflected by(More)
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