• Journal of Chest Surgery
• /
• v.32 no.2
• /
• pp.144-150
• /
• 1999

Background: Surgery has been considered the most effective and standard treatment modality in non-small cell lung cancer(NSCLC). However in stage IIIA lung cancer, the role of surgery is still controversial. To evaluate the role of surgery for stage IIIA NSCLC, we investigated the survival after surgery and the prognostic factors. Material and Method: We evaluated 158 consecutive cases of stage IIIA NSCLC patients operated on between 1990 and 1996. There were 130 male patients and 28 female patients, and the mean age was 58.5 years. All patients except one underwent lung resection beyond lobectomy and extended mediastinal dissection. Postoperative adjuvant therapy were undertaken in 145(94.8%) patients. All patients(153) were followed and the mean follow-up period was 21.4months. Result: Twenty nine cases of the postoperative complications developed in 25 patients (15.8%). There were 5 operative mortality cases(3.2%) and the main cause of death was acute respiratory distress syndrome (ARDS). Local or distant recurrences developed in 84 patients(54.9%). The 5-year survival of 153 patients was 29.6% and the median survival time was 18.0 months. The 5-year survival of non N2 disease group(36.8%) was better than that of N2 disease group(26.6%)(p=0.35) and the 5-year survival of squamous cell carcinoma (38.1%) was better than that of adenocarcinoma(25.7%)(p=0.39) however there were no significant differences. Regarding the postoperative adjuvant therapy, in combined therapy group(84 patients), radiotherapy group(37 patients) and chemotherapy group(24 patients), the 5-year survival were 31.3%, 32.4%, and 14.6% respectively. There was no difference of survival between radiotherapy and combined therapy group(p=0.31), however the survival of the combined therapy group was better than the chemotherapy group(p=0.005). The survival of the complete resection group(31.9%) was better than the incomplete resection group(16.6%) however there was no significant difference(p=0.19). Conclusion: These observations indicate that the good 5-year survival(29.6%) in patients with stage IIIA NSCLC result from the agressive surgical treatment including extensive mediastinal nodes dissection.

• Journal of Aquaculture
• /
• v.11 no.4
• /
• pp.565-572
• /
• 1998

Survival rate of larval red spotted grouper, Epinephelus akaara is very low, because mouth size of the larvae is too small to eat normal sizes of rotifers. In order to enhance larval survival, optimal culture conditions for larvae using different live foods and water temperatures were studied. Bigger live food produced larger size of rotifer, when the rotifer was cultured with three different live foods such as Tetraselmis tetrathele, marine Chlorella and Nannochloris oculata. Also, the size of rotifer produced was temperature-dependent showing that higher water temperature induced smaller rotifer. Survial rate of the larvae increased with the increase of water temperature up to $29{\circ}C$. Also, higher larval survials were found at the food density of 15 to 20 individuals per milliliter. The larvae fed L-type or small individuals of L-type rotifer died all within a week, although the larvae fed S-type or small individuals of S-type one survived successfully during this period. The size of small individuals of S-type rotifer collected through fine net became larger in a few hours within larval culture tank. Survival rate of grouper larvae with initial stocking density of 40 thousands in 6-ton concrete tank was 6.3% in 10 days and 0.2% in 53 days after hatching, respectively. Total length of the larvae reached around 29.5 mm in 53days after hatching.

• The Journal of Korean Academy of Prosthodontics
• /
• v.47 no.2
• /
• pp.240-246
• /
• 2009

Statement of problem: Insertion of endosseous implants in the atrophic maxilla is often complicated because of lack of supporting bone. Augmentation of the floor of the maxillary sinus with autogenous bone & bone substitute graft has been proven to be a reliable treatment modality, at least in the short term. The aim of this study is to evaluate the factors of implant survival rate associated with maxillary sinus lift with grafts. Material and methods: The sinus floor was augmented with bone grafts derived from modified Caldwell-luctechnique(71 subject, 93 sinus, 180 implants), the autogenous bone or autogenous+Bio-oss. Before implant installation the width and height of the alveolar crest were increased in the first stage procedure in 10 patients while in the other 61 patients augmentation and implant installation could be performed simultaneously width and height of the alveolar crest > 4 mm) or delayed installation. Results: In all case bone volume was sufficients for implant insertion. 14 of 180 inserted implants were lost during follow up and the healing period Patient received implant supported overdenture(5 patients) or fixed bridge(62 patients). Conclusion: Within the limit of the result of this study, we conclude that bone grafting of the floor of the maxillary sinus floor with bone for the insertion of implants might be a reliable treatment modality and the autogenous bone graft and delayed installation method might be the factors for good results.

• Korean Journal of Microbiology
• /
• v.35 no.1
• /
• pp.89-93
• /
• 1999

Stability and gastric acid resistance of Lactobacilli and Bifidobacteria in commercial yogurts were invcstigated. It was noted that there was significant differences of stability and gastric acid resistance among yo-wts. The sutvival of Lactobacilli and B#idohacleria in commercial yogurts decreased as a function of time during storage and showed in the range of $10^7$-$10^8$ cfulml. The lower the pH was, the lower survival of Lactobacillus and B~dobaclerium was observed. The survival of Lactobacillz and Bifidobacteria in three yogurts appeared to be $10^3$-10$^4$ cfuIml. In the case of yogurt containing Bifidobncterza- loaded capsules, the gastric acid resistance of the Rifidobncteria was greatly enhanced and the survival after treatment in a gastric juice for 120 min was over 10' cfulml.

• Journal of Dairy Science and Biotechnology
• /
• v.37 no.3
• /
• pp.206-212
• /
• 2019

This study was conducted to investigate the effect of cryoprotectants on the storage stability of Lactobacillus fermentum SK152, which was isolated as a probiotic candidate. Solutions of 10% glucose, trehalose, dextrin, and skim milk powder were used as cryoprotectants. The survival rates of L. fermentum SK152 after freeze-drying were 5.6% (dextrin), 2.2% (skim milk powder), 1.7% (glucose), and 1.5% (trehalose), suggesting that dextrin was most effective at minimizing the cell death of L. fermentum SK152 by lyophilization. The survival rates of L. fermentum SK152 stored at 4℃ ranged from 37% (dextrin)-90% (skim milk powder) after 8 weeks, while those at 20℃ ranged from 4% (dextrin)-12% (skim milk powder) after 7 weeks, indicating that skim milk powder was the best at minimizing the cell death of L. fermentum SK152 during storage, irrespective of storage temperature, among the cryoprotectants used.

• 한국벤처창업학회:학술대회논문집
• /
• 2017.04a
• /
• pp.26-26
• /
• 2017

이 연구의 목적은 실제 창업하여 5년 이상 생존한 편의점이 최적의 입지유형에 위치한 것이 크다는 영향을 증명하는데 있다. 이 목적을 달성하기 위하여 서울 주요 지역의 5년 이상 생존 점포 사례를 본인과 지인의 사례 점포, A 메이저 프랜차이즈 편의점 직원이 제공한 자료를 토대로 연구 결과를 분석하고 실제 창업 생존률을 높이는데 도움을 주고자 한다. 실증분석결과, 첫째로 입지요인은 편의점 성과에 영향을 미치는 것으로 나타났다. 둘째, 최적의 입지유형에 위치한 점포는 5년 이상 생존하는데 영향을 주는 것으로 나타났다. 최적의 입지유형에 위치한 편의점 창업은 5년 이상 생존하는데 상당한 영향을 미치므로 입지유형에 대한 인식과 실전 적용은 필요한 것으로 나타났다. 전체 창업시장으로 보면 편의점과 같이 상품의 동질성이 높은 업종이나 위치에 중점을 둔 창업인 경우 까지 확대하여 창업가의 실패를 줄이고 장기적 생존률을 높일 수 있는 연구가 확대 되어야 할 것이다.

• Food Science of Animal Resources
• /
• v.25 no.1
• /
• pp.92-97
• /
• 2005

This study was carried out to determine the storage, cryotolerance, heat and drying resistance, when Lactobacillus acidophilus CT 01 isolated from preweaned piglet feces growing at suboptimal temperature. L. acidophilus CT 01 suboptimal temperature incubated for 48 hours had the slowest growth rate at 22℃ but the highest viable cell number after 36 hours at 22℃, with 1.3×10/sup 9/ CFU/mL. In case of 4 and 20℃ storage, the suboptimal temperature incubated groups had a viability higher than the control (p<0.01). The cryotolerance of suboptimal temperature incubated L. acidophilus CT 01 was a higher than the control (p<0.01). When L. acidophilus CT 01 was heat treated at 60℃ for 15 minutes and 30 minutes, the suboptimal temperature incubated L. acidophilus CT 01 at 22℃ had a viability higher more than the control (p<0.01). L. acidophilus CT 01 incubated suboptimal temperature was inoculated by 30% to the carrier, and dried at 50℃ for 12 hours had the highest viability in the suboptimal temperature incubated L. acidophilus CT 01 at 28℃.

• Journal of Periodontal and Implant Science
• /
• v.35 no.4
• /
• pp.1039-1052
• /
• 2005

IMZ는 "intramobile cylinder implant system" (IMZ)로 독일에서 가장 오래되고 많이 사용되어진 임플란트 중 하나이다. 이 임플란트에 관한 장기적 성공률과 생존률에 대한 연구는 대개 80% 이상을 보고하고 있다. 그러나, 연세대학교 치과병원 치주과에서 식립된 83개의 임플란트에서는 이전의 연구와는 다른 결과를 나타내었다. 1. IMZ 임플란트의 생존률은 67.5% 였다. 2. 변연 치조골 소실에 대한 성공 기준을 적용한 결과 성공률은 49.4%로 나타났다. 3. 발거된 총 27개의 임플란트 중에서 임플란트 주위 골소실을 가지는 경우는 17개, 내부구조 파절은 4개, 식립체 파절은 5개로 보고되었다. 4. 10년 이상 생존된 임플란트에서 변연골 소실의 평균치는 2.82mm였다. IMZ 임플란트는 장기적으로 높은 실패율을 보고하였다. 이는 cylindrical design, titanium plasma flame spray coating, prosthodontic complication 등의 요소에 기인한 것으로 사료된다. 임플란트는 그 형태, 표면 처리 등 여러 가지 요인들에 의해 실패가 나타날 수 있으며 본 연구를 통해 임플란트의 개발 및 선택에 바탕이 될 수 있을 것으로 생각된다.

• 대한생식의학회:학술대회논문집
• /
• 2003.12a
• /
• pp.130-131
• /
• 2003

• The Journal of the Korean bone and joint tumor society
• /
• v.7 no.4
• /
• pp.133-138
• /
• 2001

Purpose : To analyze the clinical behaviors and survivorship of metastatic bone tumors. Materials and Methods : One hundred and ninty-eight metastatic bone tumors had been diagnosed from January 1982 to December 1998. Age and sex distribution, primary cancer types. metastatic sites, duration from diagnosed of primary tumors to bony metastases and survivorship were analysed. Results : Mean age was 57(24~86) years old. Lung(32.3%) and breast(16.2%) cancers were two most common primary foci. The spines was the most common site of metastases especially lumbar region(38%). Survivorship analysis was done in one hundred and fifteen patients who had been followed up. The mean survival period was 15.3 months. The survivorship of hepatoma(7.1 Mons), lung(8.72 Mons) and renal cell(4.8 Mons)cancers was relatively shorter and breast cancer(54.1 Mons) longest. Conclusion : The mean age of metastatic bone tumors of this study was older than the past reports. The axial skeletons especially spine was predominant metastatic site. The survivorship of metastatic bone tumor decreased sharply as time goes by, so early diagnosis is clue for longer survival after bony metastases.