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Item Metadata only Structural changes in rat testis, epididymis and spermatozoa following the treatment with gossypol(Mahidol University. Mahidol University Library and Knowledge Center, 1986) Vipavadee Chaisuksunt; Prasert Sobhon; Kanok Pavasuthipaisit; Chaitip Wanichanon; Pairote PrempreeItem Metadata only Site of melatonin action in rat testis(Mahidol University. Mahidol University Library and Knowledge Center, 2024) Hattaya Vimala; Boonsirm Withyachumnarnkul; Chatchai Trakulrungsi; Pairote PrempreeItem Metadata only Testicular microvascularization in common tree shrew (Tupaia glis)(Mahidol University. Mahidol University Library and Knowledge Center, 2024) Wisuit Pradidarcheep; Reon somana; Kanok Pavasuthipaisit; Boonsirm Withyachumnarnkulbranching from the abdominal aorta. In the spermatic cord it become convuluted and surrounded by pampiniform plexus. When the artery emerges from the pampiniform plexus at rostro-medial pole of the testis, it courses caudally along the medial border... seminiferous tubule. These capillaries join each other to form small and then larger venules which course along the ventral and dorsal surfaces of the testis. The venules on the ventral and dorsal surfaces drain the blood into the collecting veinsItem Metadata only The influence of photoperiod on growth an dreproductive organs of male giant freshwate prawns, Macrobrachium rosenbergii di Man(Mahidol University. Mahidol University Library and Knowledge Center, 1988) Anchalee Pongsa-asawapaiboon; Boonsirm Withyachumnarnkul; Boonserm Poolsanguan; Chaitip Wanichanonmonitored and all prawns were individually weighed once every two weeks. At the end of the experiment, the growth rate, molt frequency, molt interval, testis weight, andmicroscopic features of the testis and vas deferens were compared. In addition, sodium..., is not significant by statistical analysis. The body weight gain during the 22 week-period was also nonsignificantly higher in the L16:D8 animals. The absolute and relative testis weights of the L16:D8 animals were lower than those of the L8:D16 animalsItem Metadata only Structure of the testes of Rana catesbeiana and their changes during development and seasonal variation(Mahidol University. Mahidol University Library and Knowledge Center, 2023) Aungkura Jerareungrattana; Praset Sobhon; Prapee Sretarugsa; Jittipan Chavadej; Suchart UpathamThe testis of fully mature bullfrog, Rana catesbeiana were studied by light and transmission electron microscopes. The germ cells in the developing testis can be classified into twelve stages based on the nuclear characteristics. Primary.... During development of the testis, sex cords appear for 2 months old. When 4 months old definitive testis can be observed. Primary spermatogonia appears during four-month-old while spermatocytes and seminiferous tubules are present in the fifth monthItem Metadata only The gametogenic processes in a Thai abalone, haliotis asinina linnaeus(Mahidol University. Mahidol University Library and Knowledge Center, 1998) Somjai Apisawetakan; Prasert Sobhon; Chaitip Wanichanon; Maleeya Kruatrachue; Suchart Upathamlate stage cells, i.e., stage IV and V oocytes in ovary and spermatids and spermatozoa in testis. The spawning of gamete cells occurs at least twice during each year: from March to April and August to October in female and with similar interval