NEW YORK (GenomeWeb News) – The stocks of several firms in the GenomeWeb Daily News Index rose sharply — a couple of them rising nearly 400 percent — during the first six months of 2009.

Tech stocks, in general, rebounded somewhat over the past few months after lulls earlier in the year. The GWDN Index, which includes 36 firms in the molecular biology tools and molecular diagnostics fields, rose 16 percent during the first half of the year. Twenty nine of the 36 firms in the Index gained ground during the first six months of the year.

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Senator Elizabeth Warren (D-Mass.) has released the results of a genetic ancestry analysis, the Boston Globe reports.

Retraction Watch's Ivan Oransky and Adam Marcus report that Harvard Medical School and Brigham and Women's Hospital have recommended that more than 30 papers from a former researcher be retracted.

Thomas Steitz, who won the 2009 chemistry Nobel Prize for his ribosome work, has died, the Washington Post reports.

In PLOS this week: mechanisms for genes implicated in coronary artery disease, rumen microbes and host genetics influence cow methane production, and more.