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사과苗木에 있어서의 燐酸吸收와 生長에 關한 硏究 : 敷草의 肥料的 價値에 대한 考察을 中心으로
金吉煥 東國大學校 1964 論文集 Vol.1 No.-
A sand culture of one year old apple seedling was conducted to investigate the effects of the phosphorus incorporated into mulch and that of the same amount in inorganic form upon the absorption of the element and growth of plants. It ensued as follows: 1) The phosphorus in mulch is absorbed less and slower by the plants than its inorganic counterpart. ( in the form of NH_4H_2PO_4). 2) The absorption of phosphorus corresponds roughly to the linear growth of the plants, regardless of its form. 3) When plants are deficient in phosphorus, the growth is checked and the phosphorus level in plants also drops. This leads to vigorous absorption of the element from organic as well as from inorganic phosphorus. Particularly the latter is found to be absorbed even more, when applied rather late within the period of linear growth. 4) In this situation phosphorus constitutes the key factor which influences the growth. An early supply to the plants of the element is, therefore, highly effective to restore the once retarded growth and to promote further development of the plants, whereas late application does contribute a little to the promotion of the growth, despite that the plants may absorb more phosphorus. 5) When the phosphorus supply is abundant, it plays no longer vital role in promoting growth. In this case the absorption of phosphorus from inoganic source dose not depend on the time of application, so long as it is applied before the end of the linear growth. As for the phosphorus in mulch, on the countary, the earlier it is applied, the more absorption is follows.
朴煥奎,金鍾一,金鎭興,李茂錫,朴吉文,鄭洛奎,李行男,李東起 조선대학교 동력자원연구소 1984 動力資源硏究所誌 Vol.6 No.2
Separation, pressure and velocity distributions were studied fully developed two dimensinonal, incompressible flow over a flat airfoil in subsonic wind tunnel. Velocity and turbulence were measured with a two channel constant temperature hot wire anemometer and pressure with a pitot tube and pressure tranducer system. The experimental results were obtained as follow: (1) Turbulent intensity of shear layer just outside the separation point is considered to affect the size of separation bubble. (2) Static pressure coefficient is separated into three regions according to its value change. (3) Separation point is varied with the change of attack angle. (4) Velocity distributions and boundary layers normal to airfoil surface are changed as variation of attack angle of airfoil.
Evaluating Inventory Management Performance as Measured by Inventory Management Efficiency
Gil-Whan Kim(Gil-Whan Kim) The International Academy of Global Business and T 2023 The International Academy of Global Business and T Vol.19 No.3
Purpose - To measure inventory management performance, we aim to develop a new indicator from which the random variation factor is eliminated. To this end, we propose inventory management efficiency (IME) as a novel metric to which technical efficiency is applied. Design/Methodology/Approach - To properly define IME,we established an inventory turnover function for which the multiplicative model represents the relationship between inventory turnover and its determinants, such as gross margin, capital intensity, and sales surprise, as suggested by Gaur et al. (2005). In addition, based on empirical results and the form of the inventory turnover function, we examine in detail whether the inventory turnover function is well- defined. We then examined the validity of the research model with the inefficiency term, which is a one-sided error, and investigated whether the inventory management inefficiency term exists statistically. Findings - The inventory turnover function suggested in this study is a well-defined function, and IME is an appropriately defined indicator for measuring inventory management performance. Moreover, the actual inventory turnover is determined on average at a level that is less than the maximum inventory turnover expected from the determinants of inventory turnover. Research Implications - IME can be utilized as a newly applicable indicator for evaluating inventory management.
Min Kim,Kyoung Hwa Ha,Junyoung Lee,Sangshin Park,Kyeong Seok Oh,Dae-Hwan Bae,Ju Hee Lee,Sang Min Kim,Woong Gil Choi,Kyung-Kuk Hwang,Dong-Woon Kim,Myeong-Chan Cho,Dae Jung Kim,Jang-Whan Bae The Korean Society of Cardiology 2024 Korean Circulation Journal Vol.54 No.5
Background and Objectives: Accumulating evidence shows that sodium-glucose cotransporter 2 inhibitors (SGLT2is) reduce adverse cardiovascular outcomes. However, whether SGLT2i, compared with other antidiabetic drugs, reduce the new development of atrial fibrillation (AF) is unclear. In this study, we compared SGLT2i with dipeptidyl peptidase-4 inhibitors (DPP-4is) in terms of reduction in the risk of AF in individuals with type 2 diabetes. Methods: We included 42,786 propensity score-matched pairs of SGLT2i and DPP-4i users without previous AF diagnosis using the Korean National Health Insurance Service database between May 1, 2016, and December 31, 2018. Results: During a median follow-up of 1.3 years, SGLT2i users had a lower incidence of AF than DPP-4i users (1.95 vs. 2.65 per 1,000 person-years; hazard ratio [HR], 0.73; 95% confidence interval [CI], 0.55-0.97; p=0.028]). In individuals without heart failure, SGLT2i users was associated with a decreased risk of AF incidence (HR, 0.70; 95% CI, 0.52-0.94; p=0.019) compared to DPP-4i users. However, individuals with heart failure, SGLT2i users was not significantly associated with a change in risk (HR, 1.04; 95% CI, 0.44-2.44; p=0.936). Conclusions: In this nationwide cohort study of individuals with type 2 diabetes, treatment with SGLT2i was associated with a lower risk of AF compared with treatment with DPP-4i.
( Byung Wook Kim ),( Joon Sung Kim ),( Hyung Gil Kim ),( Byoung Wook Bang ),( Su Jin Hong ),( Jae Pil Han ),( Chang Whan Kim ) 대한내과학회 2014 대한내과학회 추계학술발표논문집 Vol.2014 No.1
Background: Eradication of Helicobacter pylori infection with triple therapy (TT) hasbeen reported to achieve unacceptable rates in Korea. Sequential therapy (ST) and concomitant therapy (CT) has been suggested as alternatives to the TT regimen. The aim of this study was to compare the effi cacy of ST and CT with that of TT in Korea. Methods: For this multicentre, randomized trial, patients (=20 years of age) with H. pylori infection from 5 centers in Korea were recruited. Patients were randomly allocated to TT (PPI, amoxicillin and clarithromycin for 10 days), ST (PPI and amoxicillin for the fi rst 5 days, followed by PPI, clarithromycin and metronidazole for the next 5 days) or CT (PPI, amoxicillin, clarithromycin and metronidazole for 10 days). The primary outcome was the eradication rate of each treatment by intention-to-treat (ITT) and per-protocol (PP) analysis. Results: From March, 2013 a total of 151 patients were enrolled in our study. Sixty one patients were allocated to the TT, 49 patients to CT group, and 29 patients to the ST group. For ITT analysis, the eradication rates of TT, ST and CT were 67.2% (41/61), 59.2% (29/49), 68.3% (28/41), respectively. For PP analysis, the eradication rates were 91.1% (41/45), 82.9% (29/35), 93.3% (28/30), respectively. We recorded no signifi cant difference in the occurrence of adverse effects or in compliance between the three groups. Conclusions: TT and CT regimens seem to achieve higher eradication rates than the ST regimen in Korea. Additional study results from more patients are expected.
The Results of Radiation Therapy of Limited Stage Small Cell Lung Cancer
김성환 (Sung Whan Kim),최병옥 (Byung Ok Choi),길학준 (Hak Joon Gil),윤세철 (Sei Chul yoon),박용휘 (Yong Whee Bahk),신경섭 (Kyung Sub Shinn),김훈교 (Hoon Kyo Kim),이경식 (Kyung Sik Lee) 대한방사선종양학회 1993 Radiation Oncology Journal Vol.11 No.1
1983년 4월부터 1991년 9월까지 가톨릭 의과대학 강남성모병원 치료방사선과에서 국한된 폐소세포암으로 확진되어 방사선치료받은 32명의 환자를 대상으로 치료성적을 후향 분석하였다. 이중 5명은 방사선 치료 단독으로 치료받았으며 27명은 화확요법과 방사선치료 병용요법을 하였다. 남녀의 비는 4.3:1 이었으며 연령분포는 24세에서 78세였다 (중앙값 : 63세), 6 MV X 선에의한 방사선치료선량은 일일 160~180 cGyTLr 치료하여 총 1000-6660 cGy (중앙값 4500 cGy) 였다. 치료후 완전관해율은 37.5% (12/32), 부분관해율은 34.4% (11/32)였고, 무반응은 28.1% (0/32)였다. 생존기간의 중앙값은 10개월이었고 1년 생존율과 2년생존율은 각 59.4%와 28.1% 였다. 1년생존율을 유의하게 증가시키는 요소로서는 70이상의 Karnofsky 수행상태 (p<0.04), 화확요법의 병향 (CAV, PV, CAV+PV) (p<0.04), 화확요법 6회이상 (p<0.007), 45 Gy 이상의 방사선량 (p<0.03)와 방사선치료에 반응있었던 경우 (CR+PR) (p<0.003)등이었다. 나이, 성별, 상대정맥증후군, 예방적 전뇌조사 및 방사선 치료기간은 유의한 영향을 미치지 않았다. 방사선 치료에 의한 부작용은 식도염이 34% (11명), 전신피로 28% (9명)에서 있었으며 오심 구같은 위장관 증상은 15%(5명) 그리고 백혈구 감소증이 3%(1명)에서 관찰되었다. A retrospective analysis of various characteristics in 32 limited stage samall cell lung cancer patients treated at the Department of Therapeutic Radiology in Kangnam st. Mary's Hospital, Catholic Universtiy Medical College from April 1983 to september 1991, was carried out to identify factors which had prognostic significance for survival from initiation of radiation therapy. There were 26 men and 6 women, Median age was 63 years (range: 24-78 years). The follow up duration was 1.5 to 44 months (median: 9 months). External radiation therapy was done with daily 160-180 cGy, 5 fraction/week, total of 100-6660 cGy (mdian: 4500 cGy) to the mediastinum by 6 MV linear accelerator. Of 32 patients, 27 (84.4%) patients were treated with combined modality (chemotherapy plus radiation therapy), and 5 (15.6%) patients were treated with radiation therapy only. Complete responders were 12 patients (37.5%), partial responders were 11 (34.4%), and no responders were 9 (28.1%). Karnofsky performance status ocer 70 (p<0.04), chemotherapy regimen (CAV, PV, and CAV=PV) (p<0.03), and radiation terapy responder (CR+PR) (p<0.003) showed a significantly favorable influence on 1 year survival rate. Age (P=0.545), sex (p=0.666), presence of superior vena cava syndrome (p=0.719), prophylactic cranial irradiation (p=0.217), and radiation therapy duration (p=0.491) had no effect on survival. Radiation induced side effects were transient esophagitis in 11 (34%), general weakness in 9 (28%), gastrointestinal symptoms in terms of nausea, vomiting and indigestion in 5 (15%) and leukopenia in 1 (3%)
폐쇄성 황달증에 (黃疸症) 대한 ERCP 의 진단적 의의
김영환(Young Whan Kim),박홍배(Hong Bae Park),정윤구(Yoon Koo Jeong),임연근(Yoen Kun Lim),김석주(Suk Ju Kim),임중규(Jun Kyu Lim),김정길(Jung Gil Kim) 대한소화기학회 1982 대한소화기학회지 Vol.14 No.2
N/A ERCP is an important new diagnostic method of biliary and pancreatic disease which has been made possible by the development of fiberoptic duodenoscopy. Authors analyzed 212 cases of obstructive jaundice out of total 646 cases of ERCP performed at the Kwangju Christian Hospital between August 1976 and July 1981, and compared them with the final diagnosis. The results were as follows: 1) Out of 212 cases, successful visualization of the duct was achieved in 189 cases (89%), 2) The ratio of male to female was about 2: 1. Most of them were in the 4th to 6th decade. 3) Out of 50 cases of CBD stone, 49 cases were diagnosed by ERCP and operation was done in 46 cases. 4) Out of 54 cases of pancreatic cancer, 32 cases were diagnosed by ERCP, But most of them were not candidate for surgical resection due to early distant metastasis. 5) Out of 32 cases of CBD cancer, 31 cases were diagnosed by ERCP alone. Also they met astasized early to liver. 6) 35 cases of hepatitis were proved to be nonobstructive cholestatic type by ERCP and biopsy. All of them were cured by medical treatment alone. 7) Out of 15 cases of ampullary cancer, 9 cases were confirmed by ERCP with endoscopic biopsy. 8) Complications of ERCP were extremely rare. Transient abdominal distention, abdominal discomfort and elevated serum amylase were noted, but were not clinically significant.
골수간엽줄기세포 및 다공성 지지체를 이용한 조직공학적 척추신경재생
김선경 ( Sun Kyung Kim ),홍금덕 ( Keum Deok Hong ),김순희 ( Soon Hee Kim ),김문석 ( Moon Suk Kim ),강길선 ( Gil Son Khang ),이일우 ( Il Woo Lee ),한창환 ( Chang Whan Han ),이혜경 ( Hea Kyung Lee ),이해방 ( Hai Bang Lee ) 한국조직공학과 재생의학회 2005 조직공학과 재생의학 Vol.2 No.2
Bone marrow stromal cells (BMSCs) were harvested from the femurs and tibias of adult female Fischer rat. BMSCs were suspended at 2×106 cell/mL in poly(L-lactide-co-glycolide) (PLGA) which was saturated with 0.5 ml methylene chloride. The ability of the PLGA with BMSCs to be integrated and to promote nerve regeneration in the transected rat spinal cord was investigated. Fischer rat received an implant consisting of the BMSCs suspended in the PLGA in a 5 mm gap (at position; T8~T9) created by the spinal cord resection. For histological evaluation, the implanted regions were removed after 4 and 8 weeks. Thin sections were cut from paraffin embedded tissue and histological sections were stained hematoxylin and eosin staining. Motor functional outcome measurements using the Basso-Beattie-Bresnehan (BBB) score performed weekly during 8 weeks of post-injury. It was observed that the effects of the PLGA with BMSCs on neuroinduction (Group III, with scaffold, cell & cytokine) are stronger that PLGA without BMSCs (Group II, with scaffold only) and blank model (Group I). In conclusion, these results suggest that BMSCs and BDNF may have an important role for spinal cord regeneration of tissue engineering.