우리나라 現行 財務狀態變動表의 有用性에 관한 實證的 檢證

朴範鎬,蔡奎學,孫 敏,李 悠,吳瑗善,全夏成 홍익대학교 경영연구소 1988 경영연구 Vol.12 No.-

흰쥐 정소 간질세포의 발생에 관한 형태학적 연구

이법이,백태경,정호삼,이규식,박준영 한양대학교 의과대학 1993 한양의대 학술지 Vol.13 No.1

It is well known that interstitial cell of Leydig is developed from the mesenchymal cell in the intestitial tissue of the testis during fetal period, but it gradually regressed until puberty when mature Leydig cell is derived from the mesenchyme of interstitial tissue of fetal Leydig cell. The function of the Leydig cell is synthesis and secretion of testosterone which influences on differentiation of male geritalia at fetal period, and revealation of male secondary sexual characteristies and differentiation of sperm at puberty. To investigate the differentiation of interstitial cell in interstitium and ultrastructural changes of interstitial cell in rat testis and ultrastructural changes of interstitial cell in rat testis and relation to testosterone secretion, the author has studied this experiment. Fetal rats on the 16th, 18th and 20th gestational days and rats on the 1st, 3rd, 7th day, 2nd, 3rd and 8th week after birth were used as experimental animals. Some of obtained testis were stained with hematoxylin and eosin for light microscopic study, and other specimens were double stained with uranyl acetate and lead citrate for electron microscopic study. The results were as follows: 1. On the 16th day of pregnancy, a few of round eosinophilic Leydig cells are firstly observed in the interstitium of testis in fetal rat. On the 18th and 20th day of pregnance, 1st and 3rd day of neonatal life, a number of Leydig cells forming cellular cord were observed. On the 1st and 2nd week after birth, number and size of Leydig cell are markedly reduced but on teh 3rd week after birth Leydig cells are reappeared. On the 8th week after birth distribution of Leydig cells is similar to that in adult rat testis. 2. On the 18th and 20th day pregnancy, and 1st and 3rd day of neonatal life, circular or oval shaped mitochondria matrix were observed in the Leydig cell. On the 1st and 2nd week after birth, giant mitochondria and mitochondria with disorganized mitochondrial crista were revealed. On the 3rd and 8th week after birth, appearances of mitochondria were similar to that in Leydig cell of the rat testis on the 20th day of pregnancy. 3. Numerous and round cisternae of smooth endoplasmic reticulum were observed in Leydig cell of rat testis on the 18th and 20th day of pregnancy. 1st and 3rd day of neonatal life, and 1st week after birth . Horseshoe-shaped deformity and reduction in number of cisternae of smooth endopalmic reticulum were revealed in Leydig cells on the 2nd week after birth. Numerous and round cisternae of smooth endoplasmic reticulum were seen on the 3rd and 8th week after birth. 4. A few lipid droplets were revealed in Leydig cell of rat testis on the 18th day of pregnancy, but many lipid droplets were observed in Leydig cells of rat testis on the 20th day of gestation, 1st and 3rd day of neonatal life, and 1st week after birth. Numbers of lipid droplets were gradually decreased after 2nd week of postnatal life. 5. Many autophagic vacuoles were observed in Leydig cells would be firstly differentiated from the mesenchymeal cells in interstitium of fetal rat testis on the 16th day of pregnancy, and proliferated from the 18th day of pregnancy to the 1st day of neonatal life, and then gradually regressed before the puberty, but at the begining of puberty adult type of Leydig cell be proliferated.

작업관련성 수근관증후근 감시체계

정우철,권호장,하미나,노상철,권범선,현정근,이성재,이종민,권정이,김준성,백남종,이호,이경우,이삼규 大韓産業醫學會 2004 대한직업환경의학회지 Vol.16 No.1

목적: 작업관련 근골격계질환은 중요한 직업관련성 질환 중의 하나이고 작업관련 수근관증후군은 이러한 작업관련 근골격계질환 중에서도 많은 부분을 차지한다. 이 연구는 작업관련 수근관증후군의 역학적 특성에 대해 알아보고자 수행되었다. 방법: 본 연구에서는 '수근관증후군 감시체계'를 통해 2000년 6월부터 2003년 2월까지 보고 된 672례의 수근관증후군 사례를 분석하였다. 직업력이 확인된 314명을 대상으로는 직업 및 작업내용에 따라 작업관련성 수근관증후군의 비율이 어떻게 달라지는지를 분석함으로써 수근관증후군 위험요인을 조사하였다. 결과: 직업력이 확인된 314명의 환자 중 작업 관련성이 의심되는 사람은 228명 (72.6%) 이었다. 직업별로는 '단순노무종사자', '농림어업숙련자', '서비스종사자' 등에서 작업관련 수근관증후군의 비율이 여성에서 유의하게 높게 나타났으나 연령, 비만도 지수, 과거병력 등에 따른 차이는 관찰되지 않았다. 주관적 증상 중에 '손을 많이 사용한 후 심해진다'와 '손을 털면 덜해진다'라는 항목을 작업관련성 수근관증후군 환자에서 더 많이 호소하였고 다른 증상은 별다른 차이를 보이지 않았다. 작업관련성 수근관증후군 환자가 비교적 많이 노출되는 작업은 '지나치게 손을 뻗쳐서 하는 일', '손을 불편한자세로 유지하는 일' 등이었다. 결론: 전체 수근관증후군 중 작업관련성이 있다는 비율이 매우 높은 것을 확인할 수 있었다. 수근관증후군 감시체계가 작업관련성 수근관증후군의 여러 특성을 밝히는데 매우 효과적인 것으로 나타났으나 현재까지는 중재 대상을 구체적으로 특정하기에는 한계가 있다. Objectives: Carpal tunnel syndrome (CTS) is one of the most important work related musculo-skeletal diseases in Korea. However, there are few epidemiologic studies on the work-related CTS (WR-CTS). This study aimed to investigate the epidemiologic characteristics of WR-CTS in Korea. Methods: Data obtained from the "CTS Surveillance System". Physician case-reports in the surveillance were used to document patterns of WR-CTS by age, gender, occupation, sign, symptom, working history. Results: Six hundred and seventy-two cases of WR-CTS were ascertained of which 3 14 with complete information on occupational history were analyzed. It has been estimated that as many as 72% of' all CTS cases are work-related. The highest proportion of WR-CTS was observed in 'elementary occupation workers', followed by 'skilled agricultural, forestry and fishery worker'. The distributions of WR-CTS cases were similar with respect to age, obesity, and past medical history. The proportion of WR-CTS was higher in females. There was no significant difference in physical examination findings between WR-CTS and non WR-CTS cases. Repetitive work and the inappropriate hand posture seemed to be the risks for WR-CTS. Conclusion: WR-CTS is a significant public health problem. The CTS surveillance system is quite useful to elucidate the characteristics of WR-CTS, but it remains of limited use in targeting specific industries and occupations for intervention.

고정층과 순환유동층에서 CaSO_4의 환원반응에 대한 온도와 CO농도의 영향

배달희,류호정,박재현,이창근,선도원,이동규 한국화학공학회 2003 Korean Chemical Engineering Research(HWAHAK KONGHA Vol.41 No.1

순환유동층 석탄연소로에서 석회석에 의한 찰황반응에 영향을 미치는 CaSO_4의 환원반응에 의한 SO-2 재배출을 실험적으로 확인하고 SO_2의 재배출에 미치는 온도와 CO 농도의 영향에대해 상용 순환유동층에 적용할 수 있는 기초자료를 확보하기 위해 고정층과 순환유동층에서 층물질로 석회석과 상용 순롼 유동층 하부회를 이용하여 환원실험을 수행하였으며 CaSO_4의 환원반응에 미치는 온도와 CO의 영향을 측정 및 해석하였다. 고온조건에서 CO가 환원제로 작용하여 C_aSO_4로부터 SO_2가 재배출되는 현상을 확인하였으며 CaSO_4로부터 SO_2의 재배출은 온도와 CO농도가 증가함에 따라 증가하였다. 본 실험의 결과에 의해 온도가 증가함에 따라 석회석에 의한 탈황율이 감소하는 현상을 환원이론으로 설명할 수 있다는 것이 확인되었다. For qualitative understanding of the sulphur capture process in a circulating fluidized bed fumace, the effects of temperature and CO concentration on the reactivity of partially sulfated CaO were experimentally examined. The tests were performed in a fixed bed reactor and lab-scale circulating fluidized bed reactor. The materials used were partially sulfated domestic limestone and bottom ash drained from commercial circulating fluidized bed furnaces. The re-emission of SO_2 from partially sulfated limestone and bottom ash increases with temperature as well as with concentration of the reducing agent CO. From the results of this study, the temperature dependence of sulfation could be explained by reduction theory.

폐부종과 심정지가 발생한 페노바비탈 중독환자

오동렬,이운정,박규남,김세경,김영민,이환,유은영,최경호,정시경 大韓應急醫學會 1999 대한응급의학회지 Vol.10 No.2

Phenobarbital is a long-acting barbiturate causing generalized depression of neuronal activity in the brain. Its effect is primarily achieved through enhanced GABA-mediated synaptic inhibition. Its use as an antiepileptic agent was first described in 1912. Before the introduction of phenytoin, phenobarbital is used as sedative-hypnotics. It is used for the treatment of epilepsy and status epilepticus. All barbiturates, including phenobarbital, have a high potential for abuse. They were frequently used for suicide attempts in the past, but they have in large part been replaced by benzodiazepines. The onset of symptoms depends on the drug and the route of administration. Mild to moderate barbiturate intoxication resembles ethanol inebriation with slurred speech, ataxia, and lethargy. Severe acute barbiturate intoxication is life threatening. Early deaths are generally cardiovascular-related. Hypotension, shock, pulmonary edema, and cardiac arrest that occurs with large doses are caused by depression of central sympathetic tone and as well as by direct depression of cardiac contractility. The potentially fatal oral dose of phenobarbital is 6-10g. We describe an 23-year-old woman with pulmonary edema, and cardiac arrest ingestion of 18grams of phenobarbital. She was completely recovered by successful cardiopulmonary resuscitation and homoperfusion. We report a case with literature review.

부유대역 용융응고법으로 제조된 YBa_2Cu_3O_x 산화물초전도체의 미세구조와 전기적 특성

노태형,송정환,장규철,한이섭,김소정,구본급,김호기 대전산업대학교 반도체기술연구소 2000 半導體技術硏究所報 Vol.2 No.-

The YBa_2Cu_3O_x-20 wt% Y_2BaCuO_5 composition designed in YBCO system was synthesized by solid state reaction method. The optimum condition of hot zone temperature and growth rate in floating-zone melt were 1080 ℃ and 2.5 mm/hour, respectively. In samples growth as these condition, the low angel boundaries in grain direction and small amount of amorphous phase known as decreasing characteristics of superconducting materials between grain boundaries in microstructure are investigated by polarized light microscopy on the whole. The critical current density(Jc) at 77k of sample using powder fabricated with no CeO_2 and doped 5 wt%CeO_2 were 8,000 A/㎠(Jc : 561A) and 12,000 A/㎠(Jc: 826A) at 0 T by direct current transport method, respectively.

Botulinum neurotoxin injection for treating plunged nose and post-rhinoplasty: anatomical perspectives of depressor septi nasi, nasalis, leveator labii superioris alaeque nasi muscle

Kyu-Ho Yi,Ji-Hyun Lee,Seon-Oh Kim,Hyewon Hu,Hyung-Jin Lee,You-Jin Choi,Tae-Hwan Ahn,Hee-Jin Kim 대한해부학회 2023 Anatomy & Cell Biology Vol.56 No.4

Botulinum neurotoxin (BoNT) injection for the treating plunged nose, post-rhinopasty and hyaluronic filler migration is common procedures in clinical settings. However, the lack of thorough anatomical understanding makes it difficult to locate the nose region muscles. The anatomical considerations concerned with BoNT injection into the nasalis, levator labii superioris alaeque, and depressor septi nasi muscles were reviewed in this study. The injection spots have been presented for the nasalis, levator labii superioris alaeque, and depressor septi nasi muscles, with the recommended injection technique for each muscle. We have suggested the ideal injection sites in association with outer anatomical landmarks of the nose region. Moreover, these proposals would support a more accurate procedure of BoNT injection in relieving plunged nose, preventing post-rhinoplasty deviation, and migration of the hyaluronic acid filler.

Intramuscular neural distribution of the teres minor muscle using Sihler’s stain: application to botulinum neurotoxin injection

Kyu-Ho Yi,Soo-Bin Kim,Kangwoo Lee,Hyewon Hu,Ji-Hyun Lee,Hyung-Jin Lee 대한해부학회 2023 Anatomy & Cell Biology Vol.56 No.3

The aim of this study was to elucidate the intramuscular arborization of the teres minor muslce for effectivebotulinum neurotoxin injection. Twelve specimens from 6 adult Korean cadavers (3 males and 3 females, age ranging from 66 to 78 years) were used in the study. The reference line between the 2/3 point of the axillary border of the scapula (0/5), where the muscle originates ant the insertion point of the greater tubercle of the humerus (5/5). The most intramuscular neural distribution was located on 1/5–3/5 of the muscle. The tendinous portion was observed in the 3/5–5/5. The result suggests the botulinum neurotoxin should be delivered in the 1/5–3/5 area of the teres minor muscle.

Novel anatomical proposal for botulinum neurotoxin injection targeting depressor anguli oris for treating drooping mouth corner

Kyu-Ho Yi,Ji-Hyun Lee,Hye-Won Hu,You-Jin Choi,Kangwoo Lee,Hyung-Jin Lee,Hee-Jin Kim 대한해부학회 2023 Anatomy & Cell Biology Vol.56 No.2

The depressor anguli oris (DAO) muscle is a thin, superficial muscle located below the corner of the mouth. It isthe target for botulinum neurotoxin (BoNT) injection therapy, aimed at treating drooping mouth corners. Hyperactivity of the DAO muscle can lead to a sad, tired, or angry appearance in some patients. However, it is difficult to inject BoNT into the DAO muscle because its medial border overlaps with the depressor labii inferioris and its lateral border is adjacent to the risorius, zygomaticus major, and platysma muscles. Moreover, a lack of knowledge of the anatomy of the DAO muscle and the properties of BoNT can lead to side effects, such as asymmetrical smiles. Anatomical-based injection sites were provided for the DAO muscle, and the proper injection technique was reviewed. We proposed optimal injection sites based on the external anatomical landmarks of the face. The aim of these guidelines is to standardize the procedure and maximize the effects of BoNT injections while minimizing adverse events, all by reducing the dose unit and injection points.

Sonographic observation of the paradoxical masseteric bulging and clinical implication of functional compartment

Kyu-Ho Yi,배형규,Soo-Bin Kim,Woo-Ram Kim,Ji-Soo Kim,김희진,Won Lee 대한해부학회 2024 Anatomy & Cell Biology Vol.57 No.1

Masseter are commonly botulinum neurotoxin targeted muscle for facial contouring in aesthetic field. However, paradoxical masseteric bulging is common adverse effect that has not been discussed with ultrasonographic observations. Retrospective study has been conducted from October, 2021 to January, 2023, out of 324 patients have done blinded botulinum neurotoxin injection in the masseter at the middle and lower portion of the masseter with each side of 25 units (letibotulinum neurotoxin type A), 3 patients demonstrated paradoxical masseteric bulging has been reported and the image observed by ultrasonography by physician. Based on the observations made, we can infer that the function of the moving muscle involves twisting of the muscle fibers during contraction, along with the twisting of the deep inferior tendon, which causes the muscle to be divided into anterior and posterior compartments rather than into superficial and deep compartments of masseter. In ultrasonographic observe the skin surface of a patient with paradoxical masseteric bulging, it is observable that either the anterior or posterior part contracts significantly. The functional units of anterior and posterior compartment are observable as muscular contraction of inward movement of the muscle from either the anterior or posterior functional unit.