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정지형,황명석,이용수,박종희,Jung, Jee-Hyung,Whang, Myung-Suk,Lee, Yong-Su,Park, Jong-Hee 한국생약학회 2000 생약학회지 Vol.31 No.1
'Si Ho'(柴胡) is one of the chinese crude drugs used mainly to cure inflammation, fever, cough, hepatitis, jaundice, etc. Though the botanical origin of the crude drug has been considered to be Bupleurum species of Umbelliferae, there has been no pharmacognostical study. To clarify the botanical origin of 'Si Ho', the morphological and anatomical characteristics of the roots of Bupleurum species growing in Korea, such as Bupleurum euphorbioides Nakai, Bupleurum falcatum L., Bupleurum leveillei Bois., Bupleurum longiradiatum Turcz. and Bupleurum scorzoneraefolium Wild. were studied. As a result, it is authentified that 'Si Ho' was proved to be the root of Bupleurum falcatum and B. scorzoneraefolium and 'Jug Si Ho' was the root of B. longiradiatum.
생약제제의 이화학적 품질평가에 관한 연구 -소청룡탕(小靑龍湯)의 분석-
정지형,박상일,박성수,박종희,Jung, Jee-Hyung,Park, Sang-Il,Park, Seong-Soo,Park, Jong-Hee 한국생약학회 1998 생약학회지 Vol.29 No.1
The famous prescription of So Cheong Ryong Tang (小靑龍湯)in Chinese herb medicine, which has been used for the treatment of common cold, influenza, asthmatic bronchitis, and bronchial asthma and, is being commercially produced in the form of decoction. However, the storage problem for this dosage form remains unsettled. The quantitative changes of the major constituents, at different temperature and time course, were examined employing HPLC and GC. Cinnamaldehyde, cinnamic acid, ephedrine, albiflorine, paeoniflorin, benzoic acid, glycyrrhizin, and liquiritin were choosen as phytochemical markers. The content of cinnamaidehyde significantly decreased when stored at increased temperature, while that of benzoic acid has increased. By overall consideration of the present experimental data, it was suggested that most constituents are considerably stable when preserved below freezing temperature.
정지형,정애영,박종희,Jung, Jee-Hyung,Jung, Ae-Young,Park, Jong-Hee 한국생약학회 1999 생약학회지 Vol.30 No.3
'Gu Maig(瞿麥)' is one of the Chinese crude drugs used mainly to cure a diuretic, gonorhoea and menostasis, etc. With regard to the botanical origin of 'Gu Maig', it has been considered to be Dianthus spp. of Caryophyllaceae, but there has not been studied pharmacognostically. To clarify the botanical origin of the "Gu Maig", the morphological and anatomical characteristics of the leaves and stems of Dianthus species growing in Korea, i.e. D. sinensis, D. superbus var. longicalycinus, D. repens, D. morii, D. superbus var. speciosus were compared. As a result, it was determined that 'Gu Maig' was the whole plant body of Dianthus sinensis and D. superbus var. longicalycinus.
정지형,김정선,임영자,이윤정,박종희,임광식 부산대학교 신약개발연구소 1997 藥學硏究誌 Vol.31 No.2
Dinoflagellates are one of the major concerns in fisheries and public health since they are the causative organisms of the 'red tide' and are known to produce highly toxic secondary metabolites which are ultimately transferred to human through the food chain. The chemistry and pharmacology of the dinoflagellate toxins and various bioactive components are reviewed in this article.
정지형,J.H. Chung 한국전자통신연구원 2023 전자통신동향분석 Vol.38 No.1
In this research, policies, and technology trends associated with quantum computers were examined, and through this, implications for domestic methods were derived. It is not a guarantee that developing quantum computing technology suited for domestic use would be successful to emulate the success stories of technology-leading nations. Technology leaders like the United States, China, and Europe are putting together strategic technology blocks to compete for technological hegemony. Adapting to and exploiting this trend will help us develop future technologies and secure market competitiveness. The dominant technology in the area of quantum computing has not yet been established. In the future, there will be fair competition in every specific technology area. At this point, it may be claimed that making audacious decisions will still lead to technological superiority.
용융염내에서의 Ba-ferrite 결정의 생성과정 및 그 자기적 특성
정지형,김창곤,윤석영,신학기,김태옥 한국세라믹학회 2001 한국세라믹학회지 Vol.38 No.11
본 연구에서는 용융염법에 의한 Ba-ferrite의 생성기구와 그 자기적특성에 대해 조사하였다. 출발원료 중 BaC $O_3$만이 용융염내에서 용해도를 가졌으며, 이는 용융염내에서는 Ba-ferrite의 생성이 용해된 $Ba^{2+}$가 F $e_2$ $O_3$나 $\delta$-FeOOH의 표면으로 확산하여 표면반응을 통해 일어나는 것으로 보인다. 한편, 출발물질($\delta$-FeOOH와 F $e_2$ $O_3$)에 따라 생성된 Ba-ferrite가 합성되는 온도는 더 낮은 온도에서 생성됨을 알 수 있었다. In this study, formation process of Ba-ferrite by using molten salt synthesis and its magnetic properties were investigated. Among starting materials, BaC $O_3$was only soluble in the molten salts, but other starting material such as $\delta$-FeOOH or F $e_2$ $O_3$was not soluble even at 105$0^{\circ}C$. It implies that the dissolved $Ba^{2+}$ diffused on surfaces of F $e_2$ $O_3$(or $\delta$-FeOOH), therefore, Ba-ferrtites were formed through surface reaction. However, the magnetic properties of Ba-ferrite prepared by two starting materials (F $e_2$ $O_3$and $\delta$-FeOOH) were not different. On the other hand, compared $\delta$-FeOOH with F $e_2$ $O_3$m, morphologies and dispersibility of Ba-ferrites prepared by using $\delta$-FeOOH were good and Ba-ferrites were obtaioned at lower temperature.