This study was aimed at developing a good taste product of pork using superior strains of pigs. The sensory taste of various kinds of pork were determined based on the results of sensory evaluation. The following results were obtained.
1) The natural taste of pork, in itself, could be most properly evaluated when cooking treatment prior to the sensory test was made with 2-fold volume water of 1.5% NaCl for a slice of meat 2.5mm in width.
2) For frozen pork, 6-8% of water and 3-4% of protein contents were lost by thawing, indicating that freezing and thawing affect the juiciness in the sensory evaluation.
3) The weight and surface area of sliced meat were decreased by heat treatment, while the width was increased. Either of these changes were larger for frozen pork than the chilled one.
4) The measurements by texturometer revealed that heat treatment increases the hardness of meat 3 to 4 times. The width of meat following heat treatment was larger for the frozen meat than the chilled one. The sensory evaluation, however, showed that the former was more tender than the latter.
5) Freezing had considerable effects on the data of the sensory evaluation. Therefore, it is necessary to stock the meat to be tested under certain conditions including freezing, package and freeze-temperature etc.

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The present study was carried out to characterize the development of the cervix, vagina and vestibule, which were collected from a total of 60 female Jinhua pigs from 1 to 120 days of age, and examined morphologically and histologically. The weight of the cervix, vagina and vestibule increased rapidly from 45 to 75 days of age. The cervical epithelium was simple columnar until 30 days of age, which was replaced by stratified flattened epithelium from 45 days of age. Though the height of the cervical epithelium increased from 45 to 75 days of age, there were not significantly differences in their values among all groups. The simple columnar epithelium of the vagina was also replaced by stratified flattened epithelium from 45 days of age. A marked increase in the height of the vaginal epithelium was observed between 60 and 90 days of age. The stratified flattened epithelium of the vestibule was observed at 1 day of age. They were stratified rapidly from 45 to 75 days of age, to increase in the height.

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