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        검색결과 12

        8.
        2016.05 서비스 종료(열람 제한)
        Background : Cirsium japonicum seeds is the high price, less than 40% germination rate is low. There is a need for a method developed to increase seed germination rate increases consumption. Also, by measuring the harvest season each functional ingredients contents was performed to investigate the optimal timing harvest of ingredients that target. Methods and Results : Test materials were used Cirsium japonicum seeds harvested from late May until mid-June in medicinal testing ground. GA3(0, 25, 50, 100 ppm), Kinetin(0, 25, 50, 100 ppm) and KNO3(0, 25, 50, 100 ppm) of Growth regulator were treated, it examined the population grew more than 1 ㎜. Contents of functional components to harvest season analyzed by HPLC after pre-treatment harvested and drying the leaves and roots in late august until early November. Germination rate of the growth regulator treatment was higher by 52% from the full ripening brown seeds GA3 100 ppm, 56% in the Kinetin 50 ppm, KNO3 treatment in 52% germination in 25 mM. The white seed germination rate was low at less than 10% of all growth regulator treatment. Functional ingredient content of leaf according to harvest time were higher respectively Rutin is 8.61 ug/g in late october, apigenin is 59.6 ug/g in beginning november, quercetin is 8.61 ug/g in beginning september, kaemferol is 32.9 ug/g in late september. Very low content in roots, there was no significant difference. The main ingredient silymarin was highest 4.36 ㎎/g at the late september in case of leaf, and syringin was maintained at a high level from mid-september to early october. Conclusion : Seed germination is thought to be able to increase the germination through the growth regulator treatment and assort brown seed. Functional components according to the harvest time is determined to be able to improve effective component when processing harvest to select a high yield by the component for the purpose.
        9.
        2014.09 서비스 종료(열람 제한)
        The transcription factor, early growth response protein 1 (EGR1), act as immediate early response genes to control various cellular and reproductive events. Egr1-deficient female mice show infertility by anovulation resulting from luteinizing hormone-β (LH-β) subunit deficiency. While ovulation, fertilization and embryo development normally occur in Egr1-deficient mice treated with a superovulation regime to rescue LH deficiency, embryo implantation was completely failed. The morphology and ultrastructure of uterine tissues were observed by light and transmission electron microscopy during the peri-implantation period in Egr1-deficient mice. To examine alterations in cellular organelles, the uterine horns were fixed with 2.5% glutaraldehyde and postfixed with 1% osmium tetroxide in PBS. After dehydration and infiltration, the samples were embedded in Epon 812. Semi-thin sections 0.5 μm thick were cut with an ultramicrotome and stained with toluidine blue for light microscopy. Thin sections were cut with a diamond knife of the ultramicrotome and placed on copper grids. The sections were double stained and examined under a transmission electron microscope. The height of luminal epithelial cells was decreased and the polarity was poorly differentiated in the Egr1-deficient comparing to the wild mice. The abundant mucinous materials were observed in the surface of luminal epithelial cells of the Egr1-deficient. It was confirmed the microarray and real time qPCR data. The luminal epithelial cells of wild mice had many dense lipophilic granules and healthy mitochondria, but not in the Egr1-deficient. It may related to production and secretion of steroid hormones and prostaglandins in the luminal epithelial cells for successful implantation. These results show that Egr1 is a critical transcription factor to fine-tune subcellular morphological and functional changes for the receptive phase of peri-implantation period of uterine tissue in mice.