Ruijiao Zhang

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A new full-length cDNA (PsD6) putatively encoding a ∆6-desaturase was cloned from the eicosapentaenoic acid-producing fungus Pythium splendens RBB-5. PsD6 contained an open reading frame of 1380 bp encoding a protein of 459 amino acids. The deduced amino acid sequence showed high similarity to those of other ∆6-desaturases. A recombinant vector expressing(More)
BACKGROUND The Pythium splendens is a potentially useful organism for the synthesis of large amounts of eicosapentaenoic acid. Peak biomass and lipid accumulation do not occur at the same time and growth temperature has an effect on the fatty acid composition. Little is known about the pathway or the genes involved in growth, lipid synthesis or temperature(More)
A novel approach to generate the flattened optical frequency comb (OFC) with tunable frequency spacing is proposed. The proposed generator consists of two cascaded polarization modulators driven by two radio frequency signals with different frequencies. By adjusting the parameters, 9, 12, and 16 comb lines can be generated with tunable frequency spacing.(More)
A simple bidirectional hybrid optical link based on an optical phase modulator (OPM) is proposed to alternatively provide wired and wireless accesses. At the optical line terminal, only an OPM along with an optical band-pass filter is employed to generate the data-bearing four-tone downlink optical signal. At the hybrid optical network unit (HONU), both the(More)
In this paper, we have reported a radio-over-fiber (RoF) link with a single sideband (SSB) optical millimeter (mm)-wave signal to support the 20 GHz, 40 GHz and 60 GHz mm-wave multiband wireless accesses, based on the optical carrier suppression (OCS) modulation via a nested Mach-Zehnder modulator (MZM). The downstream data is only modulated on one of the(More)
Eicosapentaenoic acid (EPA) is an essential polyunsaturated fatty acid for human beings. At present, the production of commercially available long-chain polyunsaturated fatty acids, mainly from wild-caught ocean fish, is struggling to meet the increasing demand for EPA. Production of EPA by microorganisms may be an alternative, effective and economical(More)
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