Qing' An Li

  • Citations Per Year
Learn More
A procedure for the resolution of over 500 nucleotides in a single loading on a sequencing gel is described. The method uses exponential wedge spacers to achieve compression of the band spacing in the lower portion of the gel. The method is simple and reliable and reduces the cost of electrophoresis and autoradiography supplies by at least a factor of two.
Conductivity data for La(2-2x)Sr(1+2xMn2O7 (x = 0.6) show a first-order transition from an orbital- or charge-ordered insulator to a metal as the temperature falls below approximately 160 K. The change in conductivity is 100 times larger than that seen previously in any single-phase manganite in zero field. The metallic low-temperature state is similar to x(More)
  • 1