The main compounds of off-odor volatiles from irradiated refrigerated vacuum-packaged pork were analyzed by gas chromatograph/mass spectrometer (GC-MS). The ana
A continuously variable displacement mechanism, which is composed of a hydraulic control valve with mechanical-positional feedback to camshaft, was designed for
目的:观察人截短型AIF(AIF△1-400)对HeLa细胞的促凋亡作用.方法:在AIF△1-120基因克隆成功的基础上进一步改造,构建截去AIF基因线粒体定位信号、FAD结合结构域和NADH结合结
This paper reports some new understandings and advances in waterglass sand technologies. The multiple chemical modification process can increase the binding str
The Bayesian probabilistic approach is proposed to estimate the process noise and measurement noise parameters for a Kalman filter. With state vectors and covar
This paper presented an investigation of atomization characteristics including the velocity vector field and the mean droplet sizes for different percentages of
Two hundred strains of bacteria from Antarctic sea ice were collected and screened for their ability of producing eicosapentaenoic acid(EPA, 20:5ω3)by means of
从沉积学角度对哈尔滨2002年3月20日的沙尘暴沉降物进行了粒度组成和化学成分分析。研究结果表明,沙尘含有大量的粗颗粒物质,表现出明显的三峰分布特征,说明它是由多种成因的组分构成。其粒度组成以粉砂(4~8Ф)为主,占71.18%,大于4Ф的砂粒组分占21.69%,小于8Ф的粘土组分仅占7.13%,平均粒径Mz为5.14Ф。沙尘主要化学成分为SiO2、Al2O3和Fe2O3,三者之和达77.8%。M
采用热重-质谱联用仪分别研究了3种煤在O2/N2和O2/CO2气氛下的热解和燃烧特性。结果表明,与N2气氛相比,CO2气氛下煤粉的热解过程可分为水分的蒸发、挥发分的释放以及较高温度
采用RT-PCR方法扩增O型口蹄疫病毒VP1基因片段,将其克隆于pET-32a.将重组质粒转化宿主菌Rosetta,经1.0 mmol/L IPTG诱导,外源基因获高效表达.通过Western-blot以及ELISA试验