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For instance , it is well known in the profession that , in one case , Professor Denbeaux had testified that he had absolutely no experience with or knowledge of typewriting comparisons . The USDA has been slow to take steps against the potential spread of encephalopathies from one animal to another , or from animals to humans . In place since the early 1990s , the salad bar is a popular option : 25 percent of the students in the district choose the salad bar as lunch daily . In Pakistan , many women live in purdah , a custom that allows them to leave home only with a chaperone , and estimates show that only 25 percent of women have access to family planning services . Save up to 70 % , with local calls at only 5.9c per minute all day . Wash pellets with 150ul 70 % ethanol with gentle agitation . While other border sectors avoided strict enforcement because they did not have enough jail space or prosecutors , authorities in the Del Rio area found bed space elsewhere in the region , assigned federal agents to help prosecute cases and began running illegal immigrants through a courtroom at a rate of one case per minute . The GAO probe follows a similar inquiry in 2003 and 2004 when undercover investigators crossed unhindered into the United States at least 14 times using counterfeit drivers ' licenses and , in one case , an expired , altered U.S. diplomatic passport . At bottom left , asphalt grafting compound is applied to a completed whip graft to prevent wood tissues from drying out . It is very important to clean your pruner by dipping in 10 % bleach solution or by spraying it with 70 % rubbing alcohol after cutting off diseased plant material and prior to pruning any healthy plants . Furthermore , the current devices show a " brick wall " flat-field pattern , produced by the laser-annealing process , which can have an amplitude of up to 70 % in the blue ( 320 nm ) and which renders flat fielding problematic . Minorities comprised 25 percent of the entering first-year class in Fall 2002 .