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버들치(Phoxinus oxycephalus)의 난자형성과정
류동석 청주대학교 산업과학연구소 2002 産業科學硏究 Vol.19 No.2
The oogenesis of upstream fatminnow(Phoxinus oxycephalus) was investigated. In ovary of the upstream fatminnow, various germ cells were distributed and their shape was round. The cytoplasm of oogonia was acidic and many vesicles were located in nucleus. In primary oocytes, yolk vesicles were distributed in peripheral side of cytoplasm. Large yolk vesicles were in cytoplasm of secondary oocytes. Also, the size of oocytes is larger than that of oogonia. Yolk mass was formed and yolk vesicles were disappeared in eggs. Also the egg envelope of egg was thinner than that of other germ cells. The oogenesis of upstream fatminnow was summerized the increase of cell size, the formation and accumulation of yolk and changes of egg envelope thickness.
류동석 청주대학교 2010 産業科學硏究 Vol.27 No.2
The reproductive cells in ovary of Korean striped bitterling(Acheilognathus yamatsutae) were investigated. In ovary of Korean striped bitterling, various reproductive cells were distributed. Oogonia were round and the cytoplasm of oogonia was acidic. In primary oocytes, yolk vesicles were distributed in marginal area of cytoplasm and many nucleoli were located at inner side of nuclear membrane. Secondary oocytes were oval and yolk vesicles were increased than those of primary oocytes. In mature eggs, yolk vesicles were changed to yolk mass and the development of follicle cell layer at outer surface of the egg envelope was distinguished.
참붕어(Pseudorasbora parva) 소장의 ALP 발현에 미치는 fenvalerate의 영향
류동석 청주대학교 2014 産業科學硏究 Vol.31 No.2
The effect of fenvalerate on ALP expression in the small intestine of Pseudorasbora parva was observed by enzyme histochemistry. In all groups, ALP was distributed in brush border in the anterior part of small intestine of Pseudorasbora parva. In 5㎍/ℓ fenvalerate treated group, ALP activity was increased than that of the fenvalerate non-treated group. But ALP activity of the 10㎍/ℓ fenvalerate treated group was decreased compared with the 5㎍/ℓ fenvalerate treated group and the fenvalerate non-treated group. In the 15㎍/ℓ fenvalerate treated group, ALP activity was increased compared with the 10㎍/ℓ fenvalerate treated group, but that was decreased compared with the fenvalerate non-treated group. It was considered that changes of ALP expression in small intestine of Pseudorasbora parva were affected by eating disorder and inflammation.
Angelfish(Pterophyllum eimekei)의 부화에 미치는 온도, 수소이온농도 및 염도의 영향
류동석 청주대학교 산업과학연구소 1996 産業科學硏究 Vol.14 No.-
Effects of temperature(15℃, 20℃, 25℃ and 30℃), pH value(pH 5.2, pH 6.0, pH 6.8 and pH 7.6) and salinity(0‰, 12‰, 24‰ and 36‰) on the hatching of angelfish(Pterophyllum eimekei) were investigated. The fertilized egg of angelfish was adhesive and demersal. Also, the elapsed time of hatching was 53.5 hours and the hatching rate was very high in freshwater at 30℃. The lower the water temperature was, the longer the hatching elapsed time was. At 15℃, the mortality was very high and the hatching process was highly inhibited. The hatching rate was very high in freshwater at pH 6.8 and the effect of pH was not higher than that of salinity. In salinity more than 12‰, the hatching process stopped and all embryos died out. The optimal water temperature for hatching of angelfish in freshwater was at 30℃ and the optimal pH for that was 6.8.
바다빙어과 빙어(Hypomesus nipponensis)의 정소 내 생식세포들에 관한 연구
류동석 청주대학교 2012 産業科學硏究 Vol.29 No.2
The reproductive cells in the testis of the pond smelt(Hypomesus nipponensis) were investigated using light microscopes. In testicular cysts of Hypomesus nipponensis, various reproductive cells were distributed. Also, spermatogonia were located on the wall of testicular cysts. Secondary spermatocytes and spermatids were distributed between the lumen and the wall of testicular cysts in early maturation period. In later maturation period, spermatids with flagellum and residual body and sperms were distributed in lumen of testicular cysts. The sperm had a oval head and the acrosome was absent.
모래무지(Pseudogobio esocinus)의 정자형성과정
류동석 청주대학교 산업과학연구소 2006 産業科學硏究 Vol.23 No.2
The spermatogenesis of goby minnow(Pseudogobio esocinus) was investigated using transmission electron microscope. In primary spermatocytes, nuclei were round or oval and mitochondria were distributed in the cytoplasm. Secondary spermatocytes had round electron-dense nuclei and mitochondria were congregated in the side of cytoplasm. The sperm had a round head, the acrosome was not found and a motile flagellum consisted of an axoneme with a typical 9+2 pattern of microtubule.
Zebrafish(Brachydanio rerio)의 발생에 관한 연구
류동석,김동희 청주대학교 산업과학연구소 1992 産業科學硏究 Vol.10 No.-
The development of zebrafish(Brachydanio rerio) by natural insemination was investigated. The fertilized egg of zebrafish was spherical, non-floated type with 1.12±0.04mm in diameter, and there were no oil balls and adhesive filaments in fertilized eggs. Also, the fertilized egg developed by irregular cleavage. Organogenesis was started at 12 hours and 40 minutes after fertilization. The Kupffer's vesicle and the otic vesicle were formed after the optic vesicle was formed. Also, the Kupffer's vesicle disappeared and the melanophore was formed after the eye lens was formed. At 40 hours after fertilization, the embryo with yolk hatched after the tail of embryo teared egg membrane.