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Schott, Affymetrix

Schott of Mainz, Germany, has received US Patent No. 7,155,934, “Method for the production of borosilicate glass with a surface suitable for modification glass obtained according to said method and the use thereof.” The patent describes a method of making borosilicate glass with a surface having reactive silica gel groups on it. The method includes preparing a borosilicate glass melt and dissolving at least 30 millimoles per liter of water in the borosilicate glass melt. The borosilicate glass with the reactive surface can be used as a substrate for chemically covalent immobilization of reactive substances. This substrate can be used to make a biochemical chip, such as a DNA or gene chip, or dirt-proof window glass.

Affymetrix has received US Patent No. 7,157,564, “Tag nucleic acids and probe arrays.” The patent claims a set of 2,500 nucleic acid sequences that is appropriate for use for a wide variety of applications requiring nucleic acid tags. For example, the sequence tags can be used to label biological and non-biological materials, in genotyping applications, and in a variety of other analyses, according to the patent’s abstract.

Affymetrix has also received US Patent No. 7,158,224, “Optically active substrates.” The patent claims a device for the optical examination of biological materials using radiation of a selected wavelength. The device includes a substrate having a first surface that includes a dense array of micro-optical elements arranged to provide increased intensity radiation or evanescent radiation, and a second surface opposite the first. The first surface is in close proximity to the biological material being examined, the patent’s abstract states.

The Scan

Dropped Charges

The US Justice Department has dropped visa fraud charges against five Chinese researchers, according to the Wall Street Journal.

More Kids

The Associated Press says Moderna is expanding its SARS-CoV-2 vaccine study to included additional children and may include even younger children.

PNAS Papers on Rat Clues to Human Migration, Thyroid Cancer, PolyG-DS

In PNAS this week: ancient rat genome analysis gives hints to human migrations, WDR77 gene mutations in thyroid cancer, and more.

Purnell Choppin Dies

Purnell Choppin, a virologist who led the Howard Hughes Medical Institute, has died at 91, according to the Washington Post.