21.   A possible biological link between oxytocin and depression is further evidenced by some laboratory experiments, Rowell said.

22.   Actually, in laboratory experiments at Wilkes University in Pennsylvania, the research psychologist uses rats as guinea pigs.

23.   But another expert in the field cautioned that the results in laboratory experiments might not carry over to human tissue.

24.   But he said he found only weak effects when estrogenlike chemicals bound to the apparent receptors in laboratory experiments.

25.   But the new work is stirring interest in academic circles because it tries to define and elaborate on cultural differences through a series of tightly controlled laboratory experiments.

26.   But University of Tennessee researchers have discovered in laboratory experiments the fertile hybrid ant can live longer in cold temperatures than either of their parents.

27.   Celera Diagnostics will use a battery of sophisticated laboratory experiments to compare the genetic sequences extracted from diseased samples to the sequences extracted from healthy volunteers.

28.   Evolutionary psychology, as defined by Cosmides, Tooby, and others, might involve laboratory experiments, cross-cultural studies and other approaches.

29.   Fears about genetically modified corn were raised last spring when it was reported that pollen from the new crop killed monarch butterfly larvae in a laboratory experiment.

30.   He calculated that actually doing the laboratory experiment would take four months.