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유동수,박태원,박래정,최순철,정환석,현영민 大韓口腔顎顔面 放射線學會 1997 Imaging Science in Dentistry Vol.27 No.1
Patient with complaints of swelling, pain in the maxillary region and discomfort visited Seoul National University Dental Hospital in August last year. Clinical examination and diagnostic imagings implied he was suffered from fungal hyphal infection but no causative fungus was found by the histopathologic and microbiologic investigation. Therefore he was diagnosed with nonspecific inflammation. But as yet, we do think this case is very similiar to some kinds of mucormycosis. So we presented this case for more thorough discussion. Followings are founded in the examination. 1. Patient had suffered from Diabetes mellitus and complained of stuffness, headache, swelling in buccal checks and paresthesia. And we found more maxillary bony destruction and ulcer with elevated margin in the palate by clinical examination. 2. In the first visit, Plain films revealed general bony destruction of the maxilla, radiopaqueness in the sinonasal cavities. CT and MRI showed soft tissue mass filled in the paranasal sinus except frontal sinus and bony destruction in involved bones. 3. No causative bacteria and fungus was found in the biopsy and microbiologic cultures. 4. Caldwell-Luc operation and curettage were carried and antibiotics were taken for 4 months. But now he was worse than in the past. 5. In the second visit, involvement of orbit, parapharyngeal sinus, clivus, cavernous sinus and middle cranial fossa were seen clearly in the CT and MRI.
흑조위축병 바이러스 RNA 를 절단하는 망치머리형 라이보자임의 제작
박종석(Jong Sug Park),김주곤(Ju Kon Kim),손성한(Seong Han Sohn),이석순(Sug Soon Lee),황영수(Young Soo Hwang) 한국응용생명화학회 1995 Applied Biological Chemistry (Appl Biol Chem) Vol.38 No.6
To develop an antiviral agent for the rice black-streaked dwarf virus (RBSDV), a hammerhead type ribozyme, which has a potential target site on the genome segment 3, was designed. Oligonucleotides for the ribozyme and its substrate were synthesized, annealed, and cloned into a plasmid pBluescript II KS(+). Ribozyme and substrate RNAs were then synthesized by in vitro transcription with T₃ RNA polymerase, obtaining RNAs in expected size, 193 and 182 nucleotides, respectively. The substrate RNA was efficiently cleaved into two fragments when incubated with the ribozyme at 55℃, while the cleavage was not detected at 37℃. In addition, the segment 3 RNA of RBSDV was also cleaved into two fragments by the same ribozyme at 55℃. Taken together, our results demonstrated that the hammerhead ribozyme has an in vitro endonucleolytic activity and may be used as an antiviral agent in transgenic plants.
A New Soybean Cultivar for Soy Sauce and Paste with Disease Resistance and High Yielding "Jinmi"
Sug Kee Suh,Young Jin Oh,Ho Ki Park,Kyong Ho Kim,Hag Sin Kim,Moon Soo Park,Duck Yong Suh,Soon Chul Kim 한국육종학회 2003 한국육종학회지 Vol.35 No.2
A new soy sauce and soy paste soybean variety, “Jinmi” was developed from the cross between HS12 (Jangyeobkong/Hwangkeumkong) and Mallikong by the soybean breeding team of the National Honam Agricultural Experiment Station in 2001. The preliminary, advanc
이순원(Soon-Won Lee),박성제(Seong-Je Park),정준호(Jun-Ho Jeong),이응숙(Eung-Sug Lee),최준혁(Jun-Hyuk Choi) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
The present work tried to achieve the goal of improving areal uniformity and minimizing residual thickness through applying roll pressing. Soft mold of PUA (poly(urethane acrylate)) was first replicated from the master pattern comprised of hexagonal hole array of photonic crystals in pitch size of 540 ㎚ and height of 270㎚. It was wrapped around quartz roll with no separate adhesive film, and made in contact with silicon substrate. A drop of UV curable resin was dispensed just before roll imprint start, so that it is supposed to fill only into the empty space between nanopatterns in the soft mold and flat silicon substrate. UV exposure is made in the center of quartz roll, and illuminated toward the contact area because the resin in open space will not cure at the presence of oxygen. We achieved almost zero residual layer in the custom-designed process roll, while a problem of incompletely-cured resin created tilted shape of nanoholes.
( Myoung Sug Kim ),( Lyu Jin Jun ),( Soon Bum Shin ),( Myoung Ae Park ),( Sung Hee Jung ),( Kwang Il Kim ),( Kyung Ho Moon ),( Hyun Do Jeong ) 한국미생물 · 생명공학회 2010 Journal of microbiology and biotechnology Vol.20 No.12
The full-length genes gyrB (2,415 bp), parC (2,277 bp), and parE (1,896 bp) in Edwardsiella tarda were cloned by PCR with degenerate primers based on the sequence of the respective quinolone resistance-determining region (QRDR), followed by elongation of 5` and 3` ends using cassette ligation-mediated PCR (CLMP). Analysis of the cloned genes revealed open reading frames (ORFs) encoding proteins of 804 (GyrB), 758 (ParC), and 631 (ParE) amino acids with conserved gyrase/topoisomerase features and motifs important for enzymatic function. The ORFs were preceded by putative promoters, ribosome binding sites, and inverted repeats with the potential to form cruciform structures for binding of DNA-binding proteins. When comparing the deduced amino acid sequences of E. tarda GyrB, ParC, and ParE with those of the corresponding proteins in other bacteria, they were found to be most closely related to Escherichia coil GyrB (87.6% identity), Klebsiella pneumoniae ParC (78.8% identity), and Salmonella Typhimurium ParE (89.5% identity), respectively. The two topoisomerase genes, parC and parE, were found to be contiguous on the E. tarda chromosome. All 18 quinolone-resistant isolates obtained from Korea thus far did not contain subunit alternations apart from a substitution in GyrA (Ser8→Arg). However, an alteration in the QRDR of ParC (Ser84→Ile) following an amino acid substitution in GyrA (Asp87→Gly) was detected in E. tarda mutants selected in vitro at 8 μg/ml ciprofloxacin (CIP). A mutant with a GyrB (Ser464→Leu) and GyrA (Asp87→Gly) substitution did not show a significant increase in the minimum inhibitory concentration (MIC) of CIP. None of the in vitro mutants exhibited mutations in parE. Thus, gyrA and parC should be considered to be the primary and secondary targets, respectively, of quinolones in E. tarda.
Ahn, Sug-Joon,Lee, Shin-Jae,Baek, Seung-Hak,Kim, Tae-Woo,Chang, Young-Il,Nahm, Dong-Seok,Lim, Bum-Soon 대한치과교정학회 2005 대한치과교정학회지 Vol.35 No.4
Streptococcus mutans와 Streptococcus sobrinus는 교정장치 주위의 법랑질 탈회를 유발하는 중요한 원인균들이다. 본 연구는 중합효소연쇄반응법을 이용하여 생체 브라켓에 존재하는 이들 균주의 이환율을 평가하기 위해 고안되었다. 상악과 하악치열의 절치 브라켓 각각 4개를 교정치료 종료 시점에서 채취하였다. 브라켓에 부착된 세균들의 DNA를 추출하고 각각의 세균에 해당하는 프라이머를 이용하여 덱스트란 분해효소를 증폭시켰다. 본 연구의 결과는 S. mutans와 S. sobrinus가 하악절치 브라켓에 비해 상악절치 브라켓에 더 많이 존재함을 보여주었으며, 이들 브라켓에 존재하는 세균의 빈도는 이전의 연구에서 구강내에 존재하는 빈도에 비해 더 적음을 보여주었다. S. mutans의 상악절치 브라켓 이환율은 50.0%, 하악절치 브라켓 이환율은 33.8%였고, S. sobrinus는 각각 17.5, 15.0%였다. 상악절치 브라켓에 두 종류의 세균이 모두 이환된 환자는 7명(8.8%)였으며, 하악절치 브라켓에 두 종류의 세균이 모두 이환된 환자는 5명(6.3%)였다. 본 연구의 결과는 법랑질 탈회를 유발하는 치아우식증 원인균이 절치 브라켓에 부착하는 상주균일 가능성을 제시한다. Streptococcus mutans and Streptococcus sobrinus are major etiological agents in enamel demineralization around orthodontic appliances. This study was designed to examine the prevalence of these streptococci on orthodontic brackets in vivo using polymerase chain reaction. Four incisor brackets in the upper and lower arches were removed and collected from 80 patients at the time of debonding. The genomic DNA of adhered bacteria was extracted and each dextranase gene of S. mutans and S. sobrinus was amplified using the specific oligonucleotide primers. The results showed that the maxillary incisor brackets were colonized by both cariogenic streptococci to a somewhat higher degree than that taken from the mandible. The prevalence of S. mutans was 50.0% on the maxillary incisor brackets and 33.8% on the mandibular incisor brackets, and that of S. sobrinus was 17.5% and 15.0%, respectively. Both species were detected on the maxillary incisor brackets of 7 patients (8.8%) and the mandibular incisor brackets of 5 patients (6.3%). These results suggest that cariogenic streptococci can adhere to the incisor brackets and may be resident species on the incisor brackets.
Cariogenic Activity in Saliva of Korean Head and Neck Cancer Patients
Hae-Soon Lim,Kyung-Yi Chung,Ae-Ok Kim,Mi-Ran Kim,Youn-Shin Kim,Mi-Sun Kang,Jeong-Won Hong,Ji-Yeon Jung,Ji-Il Park,Guem-Sug Lee KOREAN ACADAMY OF ORAL BIOLOGY 2014 International Journal of Oral Biology Vol.39 No.2
The purpose of this study is to evaluate salivary flow rate,salivary pH, and cariogenic activity using unstimulatedsaliva of the head and neck cancer patients. Twenty threecancer patients (19 males, 4 females) who had undergonechemotherapy and radiation therapy and twenty four healthyvolunteers (14 males, 10 females) as a control were included. Salivary flow rate, salivary pH, and cariogenic activity usingunstimulated saliva were examined. Compared to saliva ofthe control group, salivary flow rate (p<0.001) and salivarypH (p<0.001) were significantly lower in head and neckcancer patients. The colony counts of Lactobacilli was higherin head and neck cancer patients (p<0.05) than in controlgroup. These salivary factors and cariogenic activity canincrease the prevalence of dental caries in head and neckcancer patients.