Misorientation Characteristics at the Growth Front of Abnormally-Growing Goss Grains in Fe–3%Si Steel

Tae‑Young Kim,Tae‑Wook Na,Hyung‑Seok Shim,Yong‑Keun Ahn,Yong‑Kwon Jeong,Heung Nam Han,Nong‑Moon Hwang 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.12

Penetrating morphologies at the growth front of abnormally-growing Goss grains in Fe–3%Si steel was examined in view ofthe possibility that they are the two-dimensional section of the solid-state wetting (SSW) along the triple junction line. Toobtain the statistically meaningful data, 102 penetrated grain and 204 penetrating abnormally-growing Goss grain morphologieswere examined. The misorientation angles of penetrating and penetrated grains were measured by electron backscattereddiffraction. Among the 102 examined penetrated grain boundaries, none has low misorientation angles less than 15°,whereas 17.2% of the 204 penetrating grain boundaries have low misorientation angles, and 23.5% of them have coincidencesite lattice boundaries. Besides, boundary energies of penetrating Goss grains, which were estimated from misorientationangles of the three grains in the penetrating morphology, satisfied the energetic condition for SSW along the triple junctionline. These results imply that the abnormal grain growth of Goss grains in Fe–3%Si steel occurs by the mechanism of subboundaryenhanced SSW.

이담자균 효모 Rhodosporidium toruloides에서 Rhodotorucine A에 의한 막단백질 인산화의 저해와 Trigger Peptidase의 관련성

정영기,이태호,류병호 동의대학교 기초과학연구소 1997 基礎科學硏究論文集 Vol.7 No.1

[γ-^32P]ATP was used to test phosphorylation of membrane proteins of mating type a cells of heterobasidiomycetous yeast Rhodosporidium toruloides separated by non-denaturing electrophoresis. The phosphoprotein was observed in the membrane proteins. The phosphorylation was inhibited by the pheromone rhodotorucine A (Rh. A) secreted by mating type A of the yeast. Rh. A didn't inhibit the phosphorylation in the presence of a trigger peptidase (TPase) inhibitor, antipain. Partially digested Rh. A by trypsin maintained the phosphorylation inhibitory activity. These results show that TPase activity plays an important role in the transduction of pheromone signal in the yeast.

동물 뼈를 이용한 중금속처리에 관한 연구

정태섭,이재용,유재연 全北大學校 附設 都市및環境硏究所 1997 都市 및 環境硏究 Vol.12 No.1

The purpose of this study is to estimate the removal efficiency of heavy metals and reclamation of wastewater and application to field plant as a new technology development using powder and ceramic filter made lf waste hard tissue. The major crystal structure is hydroxyapatite(Ca_10(PO_4)_6(OH)_2). The rising of pH according to powder dosage was showed up to pH8.0. However, these tendencies do not showed upper pH8.0. The hard tissue powder showed the preference of removal efficiency for heavy metals in the sequence of Zn>Cd>Pb, adsorption efficiency by competition in mixed component does not showed. The removal efficiency depend upon powder quantity at mixed component shows in sequence of Cd>Zn>Pb in shortage of powder dosage, Pb>Zn>Cd in sufficient. In the treatment of single component with the variation of heavy metal concentration, the break-point was showed in 20㎎/ℓ heavy metal conc., and in mixed component 10㎎/ℓ heavy metal conc. Reuse of waste hard tissue will give profits because quantity of waste disposal will be decrease and environmental purification will be accelerated by using the ceramic filter made from the waste disposal. And we can have the hard tissue cheaply.

永世中立과 集團保障

鄭用泰 淸州大學校 1972 論文集 Vol.7 No.1

glpD and glpE 유전자의 조절영역 결손변이주기가 전사조절에 미치는 영향

정희태,정수열,최용락 東亞大學校附設遺傳工學硏究所 1996 遺傳工學硏究 Vol.- No.3

glpD와 glpE는 같은 조절 영역 하에서 121 bp 간격을 두고 역방향으로 전사되어지며, 이들 유전자 상류영역에 존재하는 하나의 CRP binding site가 두 유전자의 전사 조절에 관여함을 이미 여러 연구를 통하여 확인되어졌다. 본 연구에서는 glpD와 glpE의 조절영역이 다양한 크기로 결손된 변이주를 작성하였다. 각 변이된 promoter의 발현조절 영향을 보고자 LacZ와의 융합 plasmid를 작성하였고, β-galactosidase 활성을 측정하여 cAMP에 의한 발현조절을 검토하였다. 발현조절 특성을 확인한 결과 CRP binding site 전까지 결손이 된 변이주는 wild와 비슷한 활성이지만 CRP bin-ding site가 없어진 변이주의 경우는 promoter 활성이 크게 감소했고 cAMP에 의한 발현조절은 나타내지 않았다. 한편 CRP의 공통배열을 삽입시키면 회복이 가능하였다. glpE의 조절영역도 glpD와 마찬가지로 다양하게 결손시킨 변이주를 작성하여 promoter 조절활성을 확인한 결과 CRP binding site가 없어진 변이주의 경우는 promoter 활성이 크게 감소하였으며, 결손된 CRP 결합영역을 삽입시키니 cAMP에 의한 전사촉진이 거의 회복되어졌다. The glpD gene encoding gly-3-p dehydrogenase is essential for the aerobic growth of E. coli on glycerol or gly-3-p. The glpE gene, the function of which is unknown, is transcribed divergently with respect to glpD gene. Expression of the adjacent but divergently transcribed glpD and glpE genes is positively regulated by the cAMP-CRP complex. In this study, for a precise investigation of the functional elements in the regulatory region for transcription activation by cAMP-CRP, deletion mutation have been introducted into the regulatory region. The effect of the deletion mutant on transcriptional regulation was tested in vivo by β-galctosidase activity. Deletion mutants in the regulatory region of glpD demonstrated that the presence of the CRP-binding site resulted in an sixfold increase in promoter activity. And also deletion mutants of glpE gene demonstrated that the presence of the CRP-binding site resulted in an eightfold increase in promoter activity. Insertion of 22 bp oligomer in the deletion mutants has shown that the CRP binding site is need for maximal expression of glpD and glpE genes.

양측 하악과두 골절에 대한 관혈적 정보술후 나타난 근약화와 시력장애 : 증례보고

정기훈,신용길,김태열,신재명,윤규호,전인성 대한악안면성형재건외과학회 2000 Maxillofacial Plastic Reconstructive Surgery Vol.22 No.6

The condylar fracture show high occurrence rate in the following of symphysis and angle, because it is easy to have concentration of outer pressure due to its long and narrow anatomical shape and mouth opened state when trauma is attacked. For the clinical findings, there are trismus, opening deviation, mal-occlusion and open bite The classification of condylar fracture is varied due to the location of condylar bone fragment, fracture site. There are conservative and surgical methods for treatment modalities. Because of many advantages, conservative method is widely used it has no particular limits of treatment adjustment but the cases of absolutely surgical correction indication are easily found in clinical experience. Although many methods are suggested for treatments of condylar fracture, there are no particular surgical methods for precise reduction due to difficult accessibility in high condylar neck fracture. For precise reduction of condyle, we used Nam's method. However, in Nam's method, because condyle is fixed when once it is kept off externally reduced in avascular state, so complication such as condyle resorption is pointed out as a problem. In our clinic, we obtained some knowledge by treating a patient who had muscle weakness and vision disorder after temporary airway obstruction follownig the both condylar fracure operated using Nam's method, so here we reported the case with a study of documents.

Genome-wide investigation of a Korean synthetic breed, Woori-Heukdon using the Illumina PorcineSNP60K BeadChip

Yong‑Min Kim,Ha‑Seung Seong,Jung‑Jae Lee,Da‑Hye Son,Jin‑Su Kim,Soo‑Jin Sa,Young‑Sin Kim,Tae‑Jeong Choi,Kyu‑Ho Cho,Joon‑Ki Hong,Jung‑Woo Choi,Eun‑Seok Cho 한국유전학회 2020 Genes & Genomics Vol.42 No.12

Background: Woori-Heukdon (KWH) is a Korean synthetic pig breed generated using Chookjin-Duroc (KCD), Chookjin-Chamdon (KCC), and their crossbreds. Currently, there is a severe lack of studies investigating the Korean breed populations including wild boars (KWB) throughout the genome. Objective: This study was performed to investigate the genetic characteristics of Korean pig populations at the genome-wide level. Methods: Using the SNP dataset derived from genotyped and downloaded datasets using the Illumina PorcineSNP60K BeadChip, we compared the genomes of 532 individuals derived from 23 pig breeds to assess the genetic diversity, inbreeding coefficient, genetic differentiation, and population structure. Results: KWB showed the lowest average expected heterozygosity (HE = 0.1904), while KWH showed the highest genetic diversity (HE = 0.02859) among Korean populations. We verified that the genetic composition of KWH, showing USD of 74.8% and KCC of 25.2% in ADMIXTURE analysis. In population structure analyses, KCC was consistently shown to be separated from other pig populations. In addition, we observed gene flow from Western pigs to a part of Chinese populations. Conclusion: This study showed that Korean native pigs, KCC have genetic differences in comparison with Chinese and Western pigs; despite some historical records and recent genetic studies, we could not find any clear evidence that KCC was significantly influenced by Chinese or Western breeds in this study. We also verified the theoretical genomic composition of KWH at the molecular level in structure analyses. To our knowledge, this is the first genomic study to investigate the genomic characteristics of KWH and KCC.

해양미생물로부터 카로테노이드 색소의 생산을 위한 최적조건

정영기,박정욱,주우홍,류병호,정명주,김태수 동의대학교 기초과학연구소 2000 基礎科學硏究論文集 Vol.10 No.1

The optimal medium composition for the production of carotenoid pigment from Haloarcular sp. EH-1 as a dietary for fishes were 1.0% sucrose, 1.0% yeast extract, 25% sodium chloride, 0.3% sodium citrate, 0.2% potassium chloride, 2.0% magnesium sulphate, 0.002% ferric sulphate(pH7.0). The incubation temperate, aeration rate and agitation speed were 40℃, 100ml medium/500ml vol. shaking flask, and 180 rpm/min. The carotenoid pigment production was highest after 5 days of incubation with the light.

분산제어 구조를 가지는 TDX-10 전전자 교환기에서 프로세서간 통신 네트워크 관리

정연쾌,우용태 國立 昌原大學校 基礎科學硏究所 1993 基礎科學硏究所論文集 Vol.4 No.-

This paper presents the structure of Inter-Processor Communication(IPC) network implemented for TDX-10 which is the large-capacity digital swiching system with distributed control being developed by ETRI. It also describes management function of the IPC network to provide reliable internal network path.

違憲條約의 國際的效力

鄭用泰 淸州大學校 1977 論文集 Vol.10 No.1