온라인 공동체의 사회적 성격에 대한 연구

학위논문(석사)--서울대학교 대학원 :사회학과,2000.Maste

Experimental study on the masticatory efficiency in the missed first molar and crown & bridge on that area

의학과/석사[한글] [영문] The author had studied the masticatory efficiency on three different types; on missing of the first molar, on replacing the missed first molar with crown & bridge and on natural dentition. This study was made from the parched soybeans as testfood by means of mesh technique. As a result of this study on 25 of natural dentitions, 20 of crown & bridges and 25 of missing of the first molars, the followings were come out. 1. Masticatory efficiency of natural dentitions was 75.8%, that of crown & bridges was 66.4%, and that of missing of the first molars was 43.7%. 2. Difference of masticatory efficiency of crown & bridges to natural dentitions was 0.4%, that of natural dentitions to missing teeth was 32.1%, and that of crown & bridges to missing teeth was 22.7%restrictio

Experimental study of ginseng on the infectivity of parasite

의학과/박사[한글] 인삼의 치험적(治驗的) 또는 임상적 효과와 serotonin 또는 histamine과 유사한 약리작용에 대해서는 종래 여러 학자들간에 조사 연구되어 왔으나 인삼이 기생충감염에 미치는 연구 보고에 관하여는 시험관내에 있어서의 기생충발육에 관한 보고가 있을 뿐 생체내에 있어서의 실험에 관한 연구 보고는 거의 없다. 본 연구에 있어서는 기생충중 경구, 경피적으로 감염될 수 있는 견구충(Ancylostoma caninum)을 선택하여 인삼이 비호적 및 호적숙주에 대한 감염능 및 산란능에 미치는 효과를 조사하였고 아울러 면역체산생에 미치는 영향을 규명코저 견구충 감염동물의 총 혈청단백량 및 혈청단백 분획상의 변동을 보았다. 인삼주정추출액을 견구충감염전과 감염후에 비호적숙주인 백서와 호적숙주인 자견에게 주사한 후(매 ㎏당 10㎎, 10일간) 인삼 비투여군과 비교 관찰한 바 다음과 같은 결과를 얻었다. 1. 비감염 정상백서에 있어서 인삼투여군은 총 혈청단백량 및 beta-globulin치가 증가되었으나 기타 혈청단백분획상에는 대조군에 비하여 각별한 차이가 없었다. 2. 인삼투여후 견구충을 감염시킨 백서에 있어서는 대조군에 비하여 총 혈청단백량 및 혈청단백분획상의 변동이 적었다. 견구충 감염후 인삼을 투여한 백서에 있어서는 총 혈청단백량 및 albumin치가 증가되었으나 globulin치는 감소되었다. 그러나 beta 및 gamma-gl obulin의 절대치는 높았다. 3. 견구충 감염전 또는 감염직후에 인삼을 투여한 백서에 있어서는 검출된 견구충 유충 수는 비투여군에 비하여 적었으며, 특히 감염직후 인삼투여군에 있어서 더욱 현저하였다. 4. 호적숙주인 자견군에 있어서 인삼투여군은 견구충 성충의 산란수가 비투여군에 비하여 낮았다. 이상의 성적으로 미루어 인삼은 구충의 감염력을 저하시키며 성충의 산란능을 억제시키는 저해작용과 숙주의 혈청 albumin과 beta 및 gamma-globulin산생을 촉진시키는 작용이 있다고 사료되는 바이다. [영문] Comparative studies were performed on the infectivity, egg-laying capacity and antibody formation of the rats and dogs which were infected with parasite before or after the administration of ginseng extract, 10㎎/㎏/day for 10 days. As parasite, Ancylostoma caninum was used. The results are summarized as follows: The ginseng administered group, but not infected with hookworm, showed increase of total protein, though no changes in serum protein fraction were observed. Total protein in rats which were given ginseng extract after hookworm infection showed increases of total protein and beta and gamma-globulin. Infectivity in the ginseng administered group was lowered, specially in the group which ginseng was given after the infection. Egg-laying capacity also decreased by ginseng administration. The above results suggest that ginseng enhance the resistance of animals to hookworm infection, antibody formation, but suppress the egg-laying capacity of the infected worms.restrictio

Study on the determination factor of office supply for office market forecasting : static panel model and dynamic panel model based on analyzing of Seoul regional office market

학위논문 (석사)-- 서울대학교 대학원 : 건설환경공학부, 2011.8. 정창무.Maste

Current infection status and trend of isolation of group B Streptococcus.

의과학사업단/석사[한글] B군 연쇄구균은 신생아에게 중증 감염을 일으키고, 주산기 감염 및 기존 질환이 있는 성인에게도 감염을 일으키며, 최근 그 감염 빈도가 증가하고 있다고 알려져 있으나, 국내에서는 이 세균 감염에 관한 연구가 드물어서 그 감염의 현황이 확실하지 않다. 본 연구에서는 B군 연쇄구균 감염의 현황을 규명하고자 1991년 1월부터 1999년 12월까지 세브란스병원 환자에서 변 검체를 제외한 임상 검체에서 분리된 β용혈성 연쇄구균과 B군 연쇄구균의 분리성적 및 임상적 의의를 검토하였다. β용혈성 연쇄구균은 총 2,242주가 분리되었는데, 그 중 의무기록 조사가 가능하였던 것은 2,078주였다. B군 연쇄구균이 790주(38.0%)로 가장 많이 분리되었고 그 다음은 G군과 A군이 많았다. B군의 분리비율은 1991년 29.1%였으나 1999년에는 50.5%로 현저히 증가하였다. 검체별 분리비율은 A군은 농과 호흡기 검체에서 높았던 반면 B군은 요와 생식기 검체에서 높았다. 성별 분리율은 B군의 경우 남녀비가 1:1.9로 여자에서 많았으나, 다른 군은 남자에서 많았다. 연령군별로는 B군이 1세 미만과 20세 이상에서 많았고 특히 신생아 에서는 72.7%를 차지하였다. B군 연쇄구균이 분리된 790명 중 35.6%는 감염으로, 40.0%는 감염추정으로, 24.4%는 비감염으로 판단되었다. B군 연쇄구균 감염으로 판단된 283명 중 56.2%는 기존질환을 가지고 있었고, 그 빈도는 당뇨, 악성종양, 신 질환, 간 질환 순이었다. 본 연구에서 β용혈성 연쇄구균 중에 B군 연쇄구균이 A군에 비하여 2배 이상 흔히 분리되며, 그 분리 비율은 증가되고 있고, 기존 질환이 있는 성인 환자에서 많으며, 신생아에서는 다른 연쇄구균에 비하여 현저히 많고 중증 감염이 많아서, B군 연쇄구균의 신속한 미생물학적 진단이 환자의 적절한 치료를 위하여 반드시 필요하다는 결론을 얻었다. [영문] Group B Streptococcus (GBS) is known to be the leading cause of severe neonatal infections and also cause infections in pregnant women and adults with chronic underlying diseases. In addition, the frequency of GBS infections has been recently on the increase. However, there are few studies about GBS in Korea and the current status of GBS infections is not clearly identified. To identify the current status of GBS infections, this study has analyzed the isolation results and clinical importance of β-hemolytic streptococci and GBS isolated from clinical specimens, except for stool, obtained from the patients in the Severance Hospital in Seoul from January 1991 to December 1999. Of 2,242 -hemolytic streptococci isolated, clinical records of 2,078 were available. GBS was the most common isolate found in 790 cases (38.0%), followed by group G and group A. The isolation rate of group B was increased from 29.1% in 1991 to 50.5% in 1999. The isolation rate of group A was considerably high in pus and respiratory specimens while group B was most commonly isolated from urogenital specimens. By gender, the isolation rate of group B was much higher in females than males (1.9:1), while other groups were more commonly isolated in males. By age group, group B was the most common in patients under the age of one year or over age twenty. Especially for newborn babies, group B accounted for 72.7% of the total isolates. Of the 790 GBS isolates, 35.6% were considered to have definite infection, 40.0% possible infection and 24.4% no infection. Of the 283 GBS infected patients, 56.2% had chronic diseases such as diabetes, malignancy, renal and liver diseases, in decreasing order. In conclusion, among β-hemolytic streptococci, GBS is two fold more commonly isolated than group A and that the isolation rate is on the rise. The study also found that GBS is much found in adult patients with chronic underlying diseases and that the isolation rate of GBS is remarkably high in newborn babies and the neonatal GBS infections are severe. Therefore, rapid microbiological diagnosis of GBS is necessary for a proper treatment of GBS infections.ope

The Competition of the Several Languages in EC, a Study of the Multilingual Model of Swiss

Since the treaty of Maastricht, bearing the European Union in mind, European Community(EC) has strongly advanced to a politic-economic unity beyond the level of a European single market taking on the characteristic of a customs union. In the radical movement of integrating various peoples with long histories, as well as different cultures and languages, however, the greatest difficulty with which common people are confronted is the problem of language. Even though the concept of a national boundary has disappeared, a language boundary still remains and thus the contact and competition among various languages is expected to be accelerated. Therefore, Swiss, where four national languages of German, French, Italian and Romanche are spoken, has been examined as a language model of EC. For Swiss is a multi-language federal government based on the so-called principle of territoriality which aims at the maintenance of the status quo among various language areas and the protection of linguistic homogeneity in each area. In particular, the districts of bilingualism in the linguistic boundary between the French area centered on Geneva and the German area centered on Zurich are the scenes of inequality where the importance of language is determined by economic power, political influence and above all the number of the language-speaking population

PCNT is critical for the association and conversion of centrioles to centrosomes during mitosis

A centrosome consists of a pair of centrioles and pericentriolar material (PCM). We manipulated expression of PCNT, a key PCM protein, and investigated roles of PCM in centriole behavior during mitosis. Deletion of PCNT had little effect on interphase centrosomes. However, centrioles in PCNT-deleted mitotic cells prematurely separated and frequently amplified, revealing that centrioles are limited within the spindle poles by PCNT during mitosis. It is known that specific cleavage of PCNT is necessary for centriole separation during mitotic exit. We observed delayed centriole separation in the GO phase when a non-cleavable mutant form of PCNT was removed or when PCNT was artificially cleaved by TEV protease. Furthermore, a daughter centriole converts to a mother centriole only after experiencing both mitotic exit and specific PCNT cleavage. Based on these results, we propose that a centriole pair disengages upon entering mitosis but remains associated with the surrounding PCM proteins throughout mitosis. During mitotic exit, specific cleavage of PCNT induces PCM disintegration. As a result, a daughter centriole separates from the mother centriole and converts to a young mother centriole.OAIID:RECH_ACHV_DSTSH_NO:T201906738RECH_ACHV_FG:RR00200001ADJUST_YN:EMP_ID:A003075CITE_RATE:4.401DEPT_NM:생명과학부EMAIL:[email protected]_YN:YN