Measurement analysis of two radials with a common-origin point and its application.

In spectral analysis, a chemical component is usually identified by its characteristic spectra, especially the peaks. If two components have overlapping spectral peaks, they are generally considered to be indiscriminate in current analytical chemistry textbooks and related literature. However, if the intensities of the overlapping major spectral peaks are additive, and have different rates of change with respect to variations in the concentration of the individual components, a simple method, named the 'common-origin ray', for the simultaneous determination of two components can be established.

Determination of amino acid nitrogen in tuber mustard using near-infrared spectroscopy with waveband selection stability.

Near-infrared (NIR) spectroscopy was successfully applied to the rapid chemical-free determination of amino acid nitrogen (AAN) in tuber mustard. Moving window partial least squares, combined with Savitzky-Golay smoothing, was used for the waveband selection. Based on the various divisions in the calibration and prediction sets, an effective modeling approach with good stability was proposed.

Stigma against HIV-infected persons among migrant women living in Shanghai, China.

We examined the characteristics of 601 female migrants in Shanghai regarding stigmatizing attitudes toward people living with HIV/AIDS (PLWHA). A community-based cross-sectional study was conducted July and August 2008, using an anonymous questionnaire. Most participants (88%) were married, 9.