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두충나무 유식물의 하배축에서 유관속내 형성층의 기원 및 발생
姜在善,蘇雄永 全北大學校 基礎科學硏究所 1994 基礎科學 Vol.16 No.-
두충나무의 하배축에서 전형성층으로부터 유관속 형성층이 분화되는 발생과정을 밝히기 위하여 파라핀포매법으로 횡단면과 접선단면을 관찰하였다. 횡단면에서, 전형성층세포는 반복되는 병층분열에 의하여 유관속 형성층으로 분화되지만 시원세포의 기원과정을 관찰하기 어려웠다. 접선단면에서 초기의 전형성층은 횡단분열에 의해 짧은 세포들만으로 구성되는 균일한 구조를 보이지만, 후기에는 신장생장만을 계속하여 말단벽이 뾰족하고 긴 세포와 짧은 세포로 구성된다. 방추형 시원세포는 긴 세포로부터, 그리고 방사조직 시원세포는 횡단분열을 계속한 짧은 세포로부터 분화된다. 그러므로 유관속 형성층의 두 시원세포는 전형성층 발생초기의 균일한 구조를 구성하고 있던 동일 형태의 세포로부터 점진적으로 기원된다. The early ontogeny of the vascular cambium in the hypocotyl of Eucommia ulmoides seedling was studied anatomically. In transverse view, the procambial cells repeated periclinal divisions and then gradually differentiated into vascular cambium; however, in the transectional plane, it was difficult to reveal the origin of cambial initials. In tangential view, the early procambial cells repeated periclinal divisions and then the procambium consisted of homogeneous short cells. Some cells in late procambium did not show transverse divisions, but elongated continuously. Thus the procambium showed a heterogeneous structure: The long cells became fusiform initials with tapering end walls and the short cells differentiated into ray initials. Conclusively, the two types of cambial initials were gradually originated from the homogeneous cells at the early procambial stage, and they consisted vascular cambium.
Bacillus polyfermenticus SCD의 병원성 세균에 대한 항균성과 동물 및 임상에 미치는 영향
강재선,전경동,김원석,조우성,권주열,문경호 대한약학회 2004 약학회지 Vol.48 No.1
Bacillus polyfermenticus SCD which is commonly called as Bisroot (equation omitted) has been appropriately used for the treatment of long-term intestinal disorder's. This strain strongly inhibited against methicillin resistance Staphylococcus aureus (MRSA) and various pathogenic microorganisms. Effects of B. polyfermentius SCD administration on death rates and egg-laying rates in two groups of hens were investigated. This strain decreased the death rates of two groups by 16.26% and 11.72%, respectively. Also this strain increased the egg-laying rates of those 2.74% and 2.66%, respectively Clinical tests of B. polyfermenticus SCD administration to healthy adults showed not adverse effects but decreased glyceride concentration from 154.52 mg/dl to 135.41 mg/dl after two week administrations.
강재선,Chan Young Ko,Kang Min Kim,Jae Soon Ahn 대한화학회 2011 Bulletin of the Korean Chemical Society Vol.32 No.5
The aim of the present study was to improve the solubility and bioavailability of a poorly water-soluble drug in human body, using a solid dispersion technique (hot melt extrusion). The solid dispersion was prepared by cooling the hot melt of the drug in the carrier (Vitamin E TPGS and PVP). The dissolution rate of formulation 1 from a novel formulation prepared by solid dispersion technique was equal to release of formulation 6 (40%of eprosartan mesylate is in contrast to teveten^®) within 60 min (Table 1). The oral bioavailability of new eprosartan mesylate tablet having vitamin E TPGS and PVP K29 was tested on rats and dogs. Of the absorption enhancer and polymer tested, vitamin E TPGS and PVP K29, resulted in the greatest increases of AUC in animals (about 2.5-fold increase in rat and dog). When eprosartan mesylate was mixed with the absorption enhancer and polymer in a ratio of 2.94:2:1, vitamin E TPGS and PVP K29 improved eprosartan mesylate bioavailability significantly compared with the conventional immediate release (IR) tablet Teveten^®(formulation 7). These results show that solid dispersion using vitamin E TPGS and PVP K29 is a promising approach for developing eprosartan mesylate drug products.