1.   Health officials warned hemophiliacs to check their refrigerators to avoid using certain batches of the clotting factors manufactured by the Alpha Therapeutic Corp. of Los Angeles.

2.   Market analysts use a batch of statistics to divine the herd mentality but are often looking far into the future or in the wrong direction for clues.

3.   The government is warning hemophiliacs not to use several batches of clotting factor because tests found they might transmit hepatitis A.

4.   The students had used two batches of apples -- one from a commercial grower and the other they had gathered themselves -- to make the cider.

5.   The University of Southern California computer science professor devised a test using a batch of synthetic DNA molecules to compute a relatively simple and common mathematical problem.