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.

형질전환 제초제저항성 벼 밀양 204호의 농업적 특성

정응기,이기환,원용재,박향미,전남수,최준호,구연충,한창덕,은무영,김태산,남민희 Plant molecular biology and biotechnology research 2005 Plant molecular biology and biotechnology research Vol.2005 No.

This study was conducted to investigated the major characteristics of genetically modified rice of "Milyang 204" originated from Dongjinbyeo compared to a non-transgenic rice varieties Dongjinbyeo and Junambyeo. Basta resistant transgenic rice lines carrying bar gene produced by the Yeongnam Agricultural Research Institute were evaluated for their agronomic characters. The transgenic Japonica rice of "Milyang 204" showed inferior phenotypic traits compared to a non-transgenic rice variety Dongjinbyeo and Junambyeo. On the basis of UPOV (Union Internationale Pour la Protaection des Obtentions Vegetables) and NSMO(National Seed Management Office) the transgenic "Milyang 204" showed difference in some traits out of some agronomic traits, such as leaf color, angle of flag leaf, number of spikelets, culm length, white core and white belly compared to the nontransgenic varieties rice.

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.

호수원의 상수원화를 위한 수처리 공정 개선에 관한 연구

정두식,이태진,이용택 경희대학교 환경연구소 1994 環境硏究 論文集 Vol.5 No.-

This study researched the improvement of water treatment process for lake water to drinking water. Especially, we examined water in Lake Shin Gal located nearby Kyung Hee University and investigated the possilbility of the treated water for drinking purpose. Analysis of the treated water gave the satisfactory results for the standard values of drinking water except the several items. However, the water pollution will become serious if the number of factories increase. Therfore, in order to keep possibility of the water in Lake Shin Gal, the number of factories musts be restricted and the application of membrane separation process with general water treatments must be considered.

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

정영기,이태호,류병호 한국미생물생명공학회 ( 구 한국산업미생물학회 ) 1996 한국미생물·생명공학회지 Vol.24 No.6

이담자 효모균 Rhodosporidium toruloides 접합형 a 세포의 막단백질 가용화 분획을 비변성 전기영동에 의하여 인산화 한 결과 인산화 되는 단백질을 발견하였다. 이 단백질의 인산화는 Rhodotorucine A (Rh. A)에 의하여 저해되었다. 본 인산화 단백질에는 trigger-peptidase (TPase)가 존재하고 있는 것을 확인 하였으며, TPase inhibitor(antipain)를 반응액에 첨가할 경우 Rh. A에 의한 인산화 저해작용은 나타나지 않았다. 그리고, Rh. A를 trypsin으로 분해한 산물을 반응액에 첨가했을 경우 인산화 저해현상이 있는 것으로 보아, 인산화의 저해반응에는 TPase가 중요한 작용을 하는 것이 확인되었다. [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.

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.

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.

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.

이미지 처리기법을 이용한 스캐너 용지 이송정밀도에 관한 연구

정용락,김영태,장영배 금오공과대학교 2005 論文集 Vol.26 No.-

Two different types of paper feeding methods are widely used for modem printers and scanners. One of them is the flat-bed type, which utilizes a translating camera to scan the images on a stationary sheet. The other one is the sheetfed type, which requires continuous movement of the sheet. This study involves the precision of the paper feeding mechanism of the sheetfed type, which is known to be less precise. Test sheets were generated by printing straight lines in both machine and lateral directions, forming square patterns. The test sheets were. fed into the scanner, and the machine-direction line spacing of the scanned images was analyzed. It was determined that the paper speed momentarily changed three times: when the leading edge of paper contacted the guide plate, the moment the leading edge reached the pull roller, and the instant the trailing edge departed from the push roller. It appeared that the first two speed reductions were due to buckling of the sheet, while the last one was related to the loss of pushing force. For 0.1-mm-thick paper, the variation of sheet speed due to the loss of pushing force was approximately 50 percent of the average speed, while the effect of the impact at the leading edge was less significant. However, the trends reversed with thicker 0.35-mm paper. The momentary speed reduction of the thicker paper due to the impact at the leading edge was more prominent than that due to the loss of pushing force.

합성하수를 이용한 금속 막의 정밀여과 특성 및 막 오염 제어

정종태,김종오,김학균,김석구,이용재 7개 국립대학교 환경연구 논문집 공동발행 위원회 2004 공업기술연구 Vol.4 No.-

This study was to evaluate the filtration performance of metal membrane with synthetic wastewater and to investigate the effective control of membrane fouling using ozone backwashing. The increase of substrate concentration caused the increase of cake layer resistance and total resistance, however, plugging resistance decreased. Total resistance of metal membrane was mainly attributed to the permeate resistance of cake layer, which was formed by deposited particles from the physico-chemical interactions of solids on membrane surface. Intermittent ozone backwashing was more effective then the air backwashing for fouling reduction. The permeation flux recovery of air backwashing decreased over 50%, however, ozone backwashing decreased less than 10% for 4 hours filtration. This may be ascribed to the degradation of foulants in pore structure by the strong oxidation of ozone and physical exfoliation of cake layer on membrane surface with backwashing.