Zhang Xiyuan

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Phylogenetic relationships among six species of Epistylis (i. e. E. plicatilis, E. urceolata, E. chrysemydis, E. hentscheli, E. wenrichi, and E. galea) were investigated using sequences of the first internal transcribed spacer region (ITS-1) of ribosomal DNA (rDNA). Amplified rDNA fragment sequences consisted of 215 or 217 bases of the flanking 18S and 5.8S(More)
Using the BrdU antibody technique followed by an immuno-chemical staining (BAT), the amplification of DNA fragments specific to human Y chromosome on cell specimen slides was efficiently detected. Whether direct BrdU incorporation into PCR products orin situ hybridization with PCR products on slides, the amplified target DNA fragments of specimen were(More)
This paper based on the theory of all-phase spectrum, analysis the power harmonic signal. All-phase spectrum uses time shifting and phase retardation correction method to correct the frequency and amplitude of harmonic signal, all-phase FFT spectrum analysis and correcting has better performance by considering all complexions of the input data It's(More)
When the Three-phase power signal containing multiple harmonics signal, there is a clear error that FFT algorithm is used directly to measure the phase, even with the various correction methods such as ratio method, center of energy gravity method etc. precision is severely constrained by harmonic signal. To solve these problems, a modified FFT algorithm,(More)
Sex-reversed males with 45, XO and 46, XX are associated with patients carrying a small male-determining region-SRY gene of the Y chromosome, while some 46, XY females can be the result of SRY gene mutations on Y chromosome. Duplication of DSS gene on Xp21 can also cause 46, XY individual with normal Y chromosome and an intact SRY gene develops as(More)
Based on the theory of all-phase spectrum, this paper analyses frequency and harmonics of power. All-phase time-shifting phase difference correcting spectrum analysis is used to correct the measurements of parameters of power quality. All-phase FFT based spectrum analysis and correction has better performance than traditional methods by considering all(More)
When the Three-phase power signal containing multiple harmonics signal, there is a clear error that FFT algorithm is used directly to measure the phase. Even with the various correction methods such as ratio method, center of energy gravity method etc., precision is severely constrained by harmonic signal. To solve these problems, a modified FFT algorithm,(More)
Two set ofAndrias davidanus fertilized eggs and its seedlings were got by means of artificial reproduction. The sections of the embryo ofAndrias davidianus were made by histological method. The expression of homologous sequences of Quox-1 gene has been studied by immunohistochemical method with special antibody. Results show that the expression of(More)
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