We describe a simple, solid-phase chemiluminescence immunoassay for the meausrement of serum T4. An immunoglobulin G fraction of antibody to thyroxine was passively absorbed onto the walls of polystyrene tubes. The labeled antigen was thyroxine-aminobutylethylisoluminol. After the bindings reaction (37$^{\circ}C$ for 1 hour), the solution is removed by aspiration and the antibody-bound fraction was washed once with buffer. Sodium hydroxide (5mol/1,200${mu}ell$) was added and the mixture incubated for 30 minutes at 6$0^{\circ}C$. Luminescence was initiated by oxidation of the label with micropeeroxidase-hydrogen peroxide and the signal of light emission was intergrated for 10 sec. The light yield was inversely proportional to the concentration of T4 in the standard or sample. An evaluation of the method gave the following values sensitivity of calibration curve 7.5$\pm$2.8 nmol/l (mean$\pm$SD). The intra-assay precision (CV%) was 8.9, 7.3 and 5.4. The inter-assay precision (CV%) was 10.2, 8.1 and 7.1. When seum samples were assayed for T4, the results obtained by solid-phase CIA and the conventional RIA agreed well(n=3.5, r=0.954).

This study was carried out to investigate the effects of imported pellet frozen semen on sperm motility and NAR acrosomes after thawing, and the farrowing rates, litter sizes and preweaning body weights after artificial insemination. A total of 28 sows of Landrace, Large White and Duroc were inseminated at the Chungnam Provincial Animal Breeding Station. The results obtained are summarized as follows: 1. Landrace andLarge White had higher sperm motility than Duroc by about 20% and had higher NAR acrosomes by about 10%. 2. The farrowing rates of Landrace, Large White and Duroc were 63.6, 55.6 adn 50.0%, respectively. The number of pigs born alive per litter were larger in Landrace and Large White as compared with Duroc (p<.01). 3. Duroc had the highest mean pig weight at birth, followed by Landrace and Large White (p<.01). The mean pig weights at 21 days and 56 days had no significant differences between the breeds.

본 시험은 산양정자의 전배양환경으로서 적출햄스터자궁의 이용가능성을 검토하기 위해 적출햄스터자궁에서 6시간 전배양한 산양정자의 미세구조적 변화를 투과형전자현미경으로 관찰하였다. 산양정자를 채취 직후 고정하였을 때는 정자두부의 미세구조에 변화가 없었으나, 적출햄스터자궁에서 6시간 전배양한 후 고정하였을 때는 53%의 정자에서 첨체에 소포형성이 관찰되었으며, 32%는 첨체가 소실되었다. 따라서 정자두모의 소포형성은 첨체반응에 의한 것이고, 정자의 두모가 소실된 것은 죽은 정자에서 관찰되었을 가능성을 시준했다.

The cycle of the seminiferous epthelia in the testis of matured Korean Native Cattle was divided into eight stages. The results were summarized as follows: 1. Type A spermatogonia a, pp.ared twice as many at stage 2 as compared to stage 1, while maximum numbers were the average of 2.8 at stage 2. The intermediate and Type B spermatogonia were found during the stage 3 to 8, stage 6 to 8, respectively. The leptolene primary spermatocytes were not observed during the stage 5 to 7, while the pachytene primary spermatocytes were shown the least in number at stage 4, the secondary supermatocytes could be seen only at stage 4 and the round spermatids were not observed at stage 3, 4. 2. The relative frequencies of the eight stages of the cycle of the seminiferous eptithelia were 24.9, 14.2, 19.0, 6.3, 3.7, 7.9, 10.3 and 13.9%, respectively. 3. Some of the nuclei of Sertoli cells transformed from the "parallel" type to the "perpendicular" type. This evolution took place from stage 1 to 5, when the number of "perpendicular" type nuclei reached a peak and the number was decreased in the rest of the stages.sed in the rest of the stages.

본 실험은 성숙가토의 정자와 정장의 항원성을 조사하여 면역적 불임원인 규명에 필요한 기초자료를 얻고자 시도하였다. 인공질로 채취한 정액을 원심분리하여 얻은 정자와 정장을 항원으로 사용하였으며 항원성의 측정방법은 크로마토그라프에 의한 단백질 분리, SDS-PAGE, HPLC, 한천확산법, 전기영동, 수동적혈구응집방법 및 부동화시험이었다. 얻어진 결과는 다음과 같다. 1. SDS-PAGE 전기영동시 정상가토 정장에서 약 23개의 단백질이 분리되었고, 그중 분자량이 약 20,000되는 단백질부분이 정관절제 수술한 정장에서 나타나지 않았다. 2. 정상가토 정장을 HPLC를 이용한 분석에서 3개의 peaks을 볼 수 있었고, 정관절제수술한 것에서는 peak 1에 해당하는 단백질이 소실되었다. 3. 한천확산시험에서 정상정장은 이종혈청과는 4개의 침강선을 나타냈고, 전기영동에서는 7개의 침강선을 나타냈다. 4. 이종면역에서 정자 및 정장은 항체가 상승이 용이하였지만, 동종면역시는 추가면역이 필요하였으며 개체간의 역가차이를 보였다. 정자면역한 자성가토에서는 수동적혈구응집반응을 나타냈지만, 한천확산 및 전기영동반응은 보이지 않았고, 같은 처치를 받은 웅성가토에서도 역시 같은 반응양상을 나타냈다. 5. 동종 및 이종항혈청을 이용한 교차전기영동방법으로 정장의 항원적 구성요소를 구별할 수 있었다. 사출된 정액에서 분리된 정장은 일부 항원을 포함하고 있었으며 이는 성숙한 정자에서 기인한 것으로 사료되었다.

정자와 정장의 항체가 정상 및 면역가토의 과배란과 수정율에 미치는 영향을 알고자 시도된 실험결과는 다음과 같다. 1. 면역가토에서의 과배란처리에 따른 평균배란점은 정자와 정장처리구에서 각각 22.9와 25.3개로서 대조구의 41개보다 현저히 적었다(P<0.05). 2. 자둥무게와 난포크기는 처리구간에 유의적 차이가 없었으며 그러나 정자 및 정장면역 가토에서의 수정율은 각각 62.8%와 58.0%로서 대조구의 91.4%보다 현저히 낮았다.(P<0.05). 3. 가토정액을 정자 또는 정장항혈청과 혼합하여 인공수정시 수정율이 각각 5.6%와 16.0%로서 대조구보다 현저히 낮았다(P<0.05). 결론적으로 정자 또는 정장면역이 수정율에 현저하게 영향하는 것으로 나타났다.

This experiment was carried out to investigate the effects of hormone addition(FSH, HCG, estrogen and progesterone) and composition (BSA and FCS) of mKRB on the in vitro maturation and fertilizability of follicular oocytes of the Korean native cattle. The ovaries were removed at a slaughterhouse, returned to laboratory in a thermostat (30-35$^{\circ}C$) within 4 hr, and collected by aspirating normal follicles which had diameters of 1 to 6 mm. The oocytes with cumulus cells were cultured for 8, 16, 24 and 30 hr in a modified KRB solution containing BSA or FCS and hormones. The in vitro matured oocytes in mKRB containing FCS, FSH and steroids were transferred in the rabbit uterus for examination of their in vivo fertilizability with bovine sperm preincubated 4 to 6 hr in the rabbit uterus. 1. The mean number of oocytes collected per cattle was 6.5 from 1-3mm follicles, 1.3 from 4-6mm follicles, and total was 7.7. 2. The meiotic division at 16hr-cuture in the oocytes from 1-3mm follicles was slightly stimulated by the addition of FSH in mKRB + BSA solution compared with the control. At 30hr-culture, their maturation rates(%Met II) were also increased by FSH of 1 $\mu\textrm{g}$/ml(38.4%) and 5$\mu\textrm{g}$/ml(35.7%) as compared with the control (21.4%). The maturation rate at 30hr-culture in the oocytes from 4-6mm follicles was 53.8% and 57.1% by the FSH addition of 1$\mu\textrm{g}$/ml and 5$\mu\textrm{g}$/ml, respectively. These rates were similar with the control(57.1%), but higher than those of oocytes from 1-3mm follicles. 3. The meiotic division at 16hr-culture in the oocytes from 1-3mm follicles was stimulated by the HCG addition of 1IU/ml and 5IU/ml. However, the maturation rate at 30hr-culture was greatly decreased by the HCG addtion (26.6% and 13.3%) compared with the control(53.3%) and these rates (30.8%) in the oocytes from 4-6mm follicles were also lower than that fo the control(58.3%). 4. Low maturation rate (37.5%) of the oocytes cultured in mKRB containing BSA and 5IU/ml HCG was increased (55.0%) when 15% FCS with HCG was added to mKRB instead of BSA. 5. When 16hr-cultured oocytes in mKRB containing BSA and gonadotropins (5$\mu\textrm{g}$/ml FSH and 5IU/ml HCG) were transferred in the medium without gonadotropins and recultured for 16hr, the maturation rate of HCG-treated oocytes was greatly improved. 6. The maturation rates of oocytes were greatly affected by steroids. The combined addition of FCS+FSH+estrogen or +progesterone to mKRB increased the maturation rate compared with the combination of BSA+FSH or FCS+FSH in mKRB. 7. The fertilization rate, presence of pronuclei, was increased by the combination of FCS+FSH+p in mKRB as compared with that (5.6%) of BSA+FSH and the rates of FCS+FSH+steroids ranged from 12.5 to 17.6%.