After the diameters of yarn surface fibers were measured and wear trials were done,the number of surface fibers and the percentage of surface fibers,when the diameter was over some value,were partially coefficenced with the prickle value of the wool knitted fabric,respecively.

Methods Using a method of in vitro fertilization of zona free hamster oocytes with human sperm(sperm penetration assay),by comparing the frequencies of human sperm to penetrate specially prepared hamster ova before and after freezing and different freezing methods,to evaluate the effect of cryopreservation on the ability of fertilization of human sperm.