Abstract: Compounds are quickly selected from a combinatorial library by contacting the library with a target (e.g., receptor), separating non-binding compounds from compound-target complexes, and analyzing the complexes or eluted compound by mass spectroscopy. SAR information is obtained by performing this selection at two or more different ratios of compound to target.

Abstract: The present invention provides methods for tagging and tracing materials using nucleic acids as taggants. The process of tagging involves altering a substance in a manner that allows for the subsequent identification of the substance by detecting the alteration. The alteration disclosed herein involves nucleic acids.

Abstract: A high angle light scattering detector using classical Rayleigh scattering. A high intensity arc light source, filtered to leave only one wavelength illuminates a flow cell. Through the flow cell, very small particles such as biological proteins flow in solution after separation by HPLC or some other means. A UV detector generates data regarding the weight concentration of the eluting particles and a scattered light detector collecting scattered light at angles of approximately 90.degree. generates a scattered light signal. The incident light intensity is also measured. The average molecular weight is then computed using the scattered and incident light data the weight concentration data and a simplified mathematical relationship from which the size factor P and the viral coefficients have been eliminated.

Abstract: A high angle light scattering detector using classical Rayleigh scattering. A high intensity arc light source, filtered to leave only one wavelength illuminates a flow cell. Through the flow cell, very small particles such as biological proteins flow in solution after separation by HPLC or some other means. A UV detector generates data regarding the weight concentration of the eluting particles and a scattered light detector collecting scattered light at angles of approximately 90.degree. generates a scattered light signal. The incident light intensity is also measured. The average molecular weight is then computed using the scattered and incident light data, the weight concentration data and a simplified mathematical relationship from which the size factor P and the viral coefficients have been eliminated.