Shengrong Liu

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Resin-based, in situ product removal (ISPR) was used to increase production of ε-poly-L-lysine (PL) by Streptomyces sp. GIM8. D152 resin was selected over Amberlite IRC-50, Amberlite IRC-76 and Amberlite IR-120 to develop ISPR using adsorption capacity and desorption ratio as bases. The yield of PL in response to external PL was unaffected in shake-flask(More)
This study was directed at extracting the rabbit somatosensory evoked potential (SEP), locating and analyzing the waveform of rabbit SEP. The rabbit was narcotized and stimulated by 0.5 Hz electric pulse. Potential of scalp was sampled at 3.764 Hz. Rabbit somatosensory evoked potential was extracted by one-dimension multi-resolution analysis, and continuous(More)
As mobile communication business rapidly developing, the distribution system of communication building often faces pressure to upgrade capacity. According to the system's configuration features of the mobile communication building, the paper applies the dynamic programming methods to the charging process of the building's batteries. Then this method could(More)
Epsilon-poly-L-lysine (epsilon-PL), produced by Streptomyces or Kitasatospora strains, is a homo-poly-amino acid of Llysine, which is used as a safe food preservative. The present study investigates the combined use of cell immobilization and in situ adsorption (ISA) to produce epsilon-PL in shaken flasks. Loofah sponge-immobilized Streptomyces(More)
OBJECTIVE To assess the effect of cellular activity on ε-poly-1-lysine (ε-PL) biosynthesis and thereby to rationally improve the production, we studied the cellular activity, ε-PL formation and other parameters cross flask fermentation by Streptomyces ahygroscopicus. METHODS Laser scanning confocal microscopy and a colorimetric method were used to(More)
Component and plug-in technologies took GIS into a new development stage. Using GIS components and plug-ins, many GIS functions can be rapidly integrated into various GIS application systems, which greatly reduces the complexity of secondary development of GIS. VRmap, a three-dimensional geographic information system software, provides a powerful(More)
A photo-medical capsule that emits blue light for Helicobacter pylori treatment was described in this paper. The system consists of modules for pH sensing and measuring, light-emitting diode driver circuit, radio communication and microcontroller, and power management. The system can differentiate locations by monitoring the pH values of the(More)
OBJECTIVE Salmonella isolates from meat in Guangdong Province were characterized to determine their phenotype and serotype, to investigate contamination status of meats by Salmonella and provide scientific basis for detection and further control. METHODS 209 meat samples were detected according to methods GB 4789.4--2010 National food safety standard Food(More)
Epsilon-Poly-L-lysine (epsilon-PL) is a polymer with strong antimicrobial activity and consists of 25-35 L-lysine monomers linked via epsilon-amino-alpha-carboxyl peptide bond. This polymer is one of only two homo-poly (amino acid) polymers known in nature. To date, the biosynthesis mechanism of epsilon-PL was remained unclear. Recently, epsilon-PL(More)
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