Yuncheng Diao

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A sensitive and simplified high performance liquid chromatographic procedure has been developed for quantification of lomefloxacin in human plasma. The recovery of lomefloxacin was 95 to 102%. The relative standard deviation was 2.1 to 7.8%. The calibration curve was linear in the range from 0.125 micrograms/ml to 5.012 micrograms/ml with r = 0.9998. The(More)
Directional and orientational components usually coexist and are mixed in the cell's overall responses when moving optical stimuli are used to study the response characteristics of visual neurons. While these two properties were quantified with all the previous methods for data analysis, their effects could not be efficiently separated from each other, and(More)
A novel sustained-release tablet of miocamycin was developed based on the hydrodynamically balanced controlled drug delivery system (HBS). It was prepared to contain fast-release and sustained-release granules. The gamma-scintiphotographic study after oral ingestion showed that MOM-HBS remained in human stomach for more than 7 hours, much longer than the(More)
Ofloxacin is a new broad-spectrum oral bactericidal antimicrobial agent. Its primary effect is the inhibition of bacterial DNA gyrase. This paper describes the development of a simple method for its determination using HPLC with UV detection. We used a Waters liquid chromatograph equipped with a Model 490 E multi-wavelength detector, a Model 510 pump and a(More)
OBJECTIVE To study the manifestation and outcome of ovarian follicular maldevelopment (FM) in infertile women. METHODS Among 296 infertile women, 80 cases with FM were taken as study group and 20 with normal ovulation as control. Serial B-ultrasonography, cervical mucus scoring, serum estradiol (E2) assay and laparoscopy, endometrium histology were(More)
Nitric oxide is an important neuromodulator in the brain and is involved in the development of visual system. But it is not clear how nitric oxide and nitric oxide synthase (NOS) are involved in the developing visual cortex of rodents. Thus we examined the expression of NOS activity in the postnatal developing visual cortex of the golden hamster by using(More)
A family of moving ‘random-line’ patterns was developed and used to study the directional tuning of 91 single units in cat primary visual cortex (V1). The results suggest that, in addition to the well-known orientation-dependent mechanism, there is also some kind of orientationindependent mechanism underlying the direction selectivity. The directional(More)
DDVP was isolated from white spirits using Solid-Phase Microextraction (SPME) technique, and determined by wide-bore capillary gas chromatography (GC) coupling a flame ionization detector. This method had an excellent linearity among 0.5-12 mg/L. Correlation coefficient and minimum detectable concentration were 0.9983 and 0.05 mg/L respectively. This method(More)
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