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Research scientist Judy Lacey works on a biobutanol research program while examining DNA electrophoresis gel in an undated company photo. Chemical maker DuPont Co. reported Tuesday a loss of $629 million in the fourth quarter, as declines in construction, motor vehicle sales and consumer spending caused a steep decline in global industrial production and diminished demand and the volume of the company's sales to more than 20 percent in the quarter. (DuPont Photo/handout)
