Electropulsing Treatment on Enhancement of Electrical Conductivity of Screen-Printed Ag Wire

Ju‑Won Park,Howook Choi,Hwangsun Kim,Simoon Sung,Hye‑Jin Jeong,Il Kim,Jaeseok Gong,Sung‑Tae Hong,Heung Nam Han 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.5

The effect of high electric current density on the sintering of Ag wires manufactured by screen printing is evaluated throughelectrical resistivity analysis and microstructure observation. Different forms (continuous and pulsed) of electric currentwith different current densities are applied to the specimens. Conventional heat treatment is also performed as a controlgroup to examine the athermal effect of electropulsing treatment. Compared to the conventional heat treatment, the resistivityis reduced more under the electropulsing treatment with continuous current for the same temperature and treatment time.Also, the process time of electropulsing treatment can be reduced by applying a pulse form of high density current insteadof continuous current without losing the benefit of enhanced reduction of resistivity. The microstructural observationsobtained from high angle annular dark field scanning transmission electron microscope and a digital precession instrumentclearly show that necking connecting the crystals is formed more firmly under electric current. In addition, the temperaturechange of Ag wire and substrate is calculated according to the change of the resistivity when the electric current is appliedto confirm the reliability.

대동맥 협착증과 동반된 출혈성 위장관 동정맥 기형에서 Estrogen-Progesterone 치료 1예

김도연,김화정,김효정,남준식,박수영,박영미,신정은,주미순,황민규,정혜경,손혜영,이선영,이한주 大韓消化器內視鏡學會 1999 Clinical Endoscopy Vol.19 No.부록2

장기간 항갑상선제 투여 후 임의 중단 뒤 재복용시 발생한 무과립구증 1 예

김승만;김태영;박수영;배영환;서영경 정은주;김태균;권민정;박정현;이순희 인제대학교 2011 仁濟醫學 Vol.32 No.-

Agranulocytosis, one of the major side effects of antithyroid a gents, probably occurs in less than 0.25% of cases treated with antithyroid agents. It usually occurs within the first several weeks or months after the initiation of therapy, when drug dosage is higher. Most reported cases of agranulocytosis have occurred during the first 3 months of therapy. We describe here a rare case that did not experience the side effect for 6 years of antithyroid agent treatment but presented with agranulocytosis in one month after re-exposure. It suggests that the major side effect such as agranulocytosis can occur in patients who had undergone prior uneventful antithyroid drug therapy.

Potassium alum과 비우식성 감미료의 병용이 Streptococcus mutans의 성장에 미치는 영향

김윤정,차정단,김지영,김강주,이흥수 대한구강보건학회 2003 大韓口腔保健學會誌 Vol.27 No.3

Traditionally, Koreans have used potassium alum by mouth rinse when they suffered from stomatitis. This study was carried out to investigate the combined effect of potassium alum with aspartame, sorbitol and xylitol on the growth of Streptococcus mutans (S. mutans). The relative growth ratio of S. mutans JC-2 cultured at different concentrations of potassium alum and different concentrations of aspartame, sorbitol and xylitol was examined. The combined effect of different concentrations of potassium alum with 0.5% and 10.0% of aspartame, sorbitol and xylitol was examined. The lowest minimum inhibitory concentration of potassium alum was 5.0mg/ml against S. mutans JC-2. The relative growth ratio of potassium alum on S. mum JC-2 was affected at the concentration of 2.0mg/ml. The growth of S. mutans JC-2 decreased at the concentration of 10.0% of aspartame and sorbitol. Also, a combination of potassium alum and sugar substitutes was more effective against S. mum than the use of one sugar substitute alone. The inhibitory effect of potassium alum and sugar substitutes on S. mutans may be an important mechanism of caries prevention by potassium alum.

출류(朮類)한약재의 외,내부형태와 이화학패턴 연구

김정훈 ( Jung Hoon Kim ),이금산 ( Geum San Lee ),최고야 ( Go Ya Choi ),황성연 ( Sung Yeoun Hwang ),김홍준 ( Hong Jun Kim ),정승일 ( Seung Il Jeong ),주영승 ( Young Sung Ju ) 대한본초학회 2009 大韓本草學會誌 Vol.24 No.2

Objectives: To determine the discriminative criteria for Atractylodes rhizomes, the experiment of external-internal characteristics and physicochemical pattern analysis were performed. Methods: External characteristics was observed using stereoscope. The sectioned materials which were covered with parffin were stained by Ju`s method. Physicochemical patterns were analyzed using HPLC/DAD. Results: 1. External shape of original plant: Atractylodes macrocephala and A. japonica had relatively long petioles and 3-5 parted leaves. A. macrocephala had big purple flowers whereas A. japonica had relatively small white flowers and pinnate bracts. A. lancea had sessile leaves and white flowers, and the end parts of degenerated stamens were bent. 2. External shape of herbal medicine: A. macrocephala which was fist-shaped rhizome had pa-pillate processes and the cross section was light gray and sulcate. A. japonica and A. lancea were connected-beady or tubercular rhizomes, and the cross sections were both yellow-colored white. However, the cross section of A. japonica was fibrous, the width of cortex was narro-wer than that of stele, and radial shape in cortex was rare, whereas the width of cortex in A. lancea was similar to that of stele in size, and radial shape in cortex was obvious. 3. Internal shape of herbal medicine: A. macrocephala and A. lancea did not have lignified fascicles in cortex. However, the vascular bundles and vessels of A. macrocephala were wedge shaped and radial arrangement, and vascular bundles were densely populated in stele whereas those of A. lancea were repeatedly arranged and thinly extended to cortex. A. japonica had lignified fascicles in cortex and the width of vascular bundles was conspicuously thick with narrow intervals. 4. Physicochemical pattern analysis: A. macrocephala and A. lancea contained atractylenolide Ⅰ and atractylenolide Ⅲ whereas A. japonica contained atractylenolide Ⅰ, atractylenolide Ⅲ, diacetyl-atractylodiol, compound-4, compound-5. The three species of Atractylodes rhizomes showed different chromatogram patterns. Conclusions: The results could be used as discriminative criteria for Atractylodes rhizomes and as fundamental materials to researches of further pattern analysis and biological reaction.

정상면역을 가진 환자에서 발생한 복부대동맥의 진균 감염성동맥류 1예

이호영,김태형,추은주,전민혁,이은정,정은정,전성란,박의주,염욱,장원호,황정화,김동훈,김동원 대한감염학회 2008 감염과 화학요법 Vol.40 No.3

감염성동맥류는 드물지만, 치명적인 질환이다. 진성 진균성 감염성동맥류는 더 드물게 발생한다. 진균감염은 사망률과 이환율이 매우 높다. 그러나 증상이 비특이적이고 일반적인 진단방법으로는 민감하게 진단이 되지 않기 때문에 종종 진단이 어렵다. 저자들은 면역이 정상이고 다른 위험인자가 없는 환자에서 복부대동맥에 발생한 진균성 감염성동맥류를 경험하여 이를 보고한다. 컴퓨터 단층촬영과 혈관 수술에 기초하여 진단하였으며, 수술 후 조직배양에서 균이 동정되지는 않았으나 절제한 혈관조직에서 칸디다 감염을 시사하는 발아가 있는 효모균이 관찰되었다. 한국에서 1988년에서 2007년까지 복부에 발생한 감염성동맥류 17증례를 고찰하였을 때 진성 진균성 감염성동맥류는 없었으며, 저자들이 경험한 것이 복부에서 발생한 진균감염성 동맥류로는 첫 증례이다. Infected aneurysms are uncommon, frequently fatal lesions. "True" fungus-infected aneurysms are even rarer. Fungal infections have high morbidity and mortality. However, diagnosis is frequently difficult, since the symptoms are non-specific and standard diagnostic procedures are often insensitive. We experienced a patient with persistent fever and negative blood cultures. The patient was immunocompetent and had no risk factors, and was diagnosed with a fungus-infected aneurysm based on computed tomography and vascular surgery. The vascular tissue revealed some narrow-based budding yeast within the thrombus, suggesting Candida infection. Seventeen cases of infected aneurysm of the abdomen were reported in Korea from 1988 to 2007, although none were "true" fungus-infected aneurysms, making this the first fungus-infected aneurysm of the abdomen in Korea. Prompt diagnostic procedures and aggressive treatment modalities are necessary for patients with occult infection and negative blood cultures, regardless of their immunocompetence, because of the high morbidity and mortality of this condition.

체간안정화 훈련이 만성 뇌졸중 환자의 호흡기능에 미치는 효과

이경진(Kyeong-Jin Lee),정주현(Ju-Hyeoun Jeong),조명래(Myeong-Rae Jo),김세윤(Se-Yoon Kim),김난수(Nan-Soo Kim) 대한심장호흡물리치료학회 2019 대한심장호흡물리치료학회지 Vol.7 No.1

Purpose : The purpose of this study is to examine the effects of trunk stability training on improving trunk control, respiratory function, and respiratory muscle activation in stroke patients. Methods : The subjects were assigned to two groups: the intervention group (n=15) and the control group (n=15). Both groups participated in a conventional stroke rehabilitation program, but the intervention group also received trunk stability training for 30 minutes a day, 3 times a week, for 6 weeks. The main trunk stability exercise consisted of the dead bug exercise. Trunk control was assessed using a trunk impairment scale, and respiratory function (pulmonary function and respiratory muscle function) was assessed using spirometry. The data were analyzed using the Pearson correlation, independent t-test, and paired t-test. Results : Trunk control was significantly positively correlated with pulmonary function and respiratory muscle strength. Both groups showed a significant increase in trunk control and respiratory function. Conclusion : This study demonstrated that a conventional stroke rehabilitation program and trunk stability training have positive effects on respiratory function and respiratory muscle activation in stroke patients.

Clinicopathological role of kidney injury molecule-1 in immunoglobulin A nephropathy

( Yu Ho Lee ),( Yang-gyun Kim ),( Sang-ho Lee ),( Ju-young Moon ),( Kyung-hwan Jeong ),( Tae-won Lee ),( Chun-gyoo Ihm ) 대한신장학회 2014 Kidney Research and Clinical Practice Vol.33 No.3

Background: Urinary kidney injury molecule-1 (KIM-1) is an early and sensitivebiomarker of acute kidney injury, but it is unclear if it is a biomarker of chronicglomerulonephritis. We evaluated whether urinary KIM-1 levels in patients withimmunoglobulin A (IgA) nephropathy can be a marker to reflect clinicopathologicalseverity and predict the prognosis. Methods: We measured urinary KIM-1 levels in 40 patients (15 males; mean age36.6712.9 years) with IgA nephropathy and 10 healthy people (5 males; mean age37.379.6 years) as controls. The correlation of urinary KIM-1 levels with patients’clinical parameters, histological grades, and follow-up data were analyzed using themodified H. S. Lee grading system and tubulointerstitial change scores. Results: Urinary KIM-1 levels were higher in patients with IgA nephropathy thanhealthy controls (P¼0.001). Univariate and multivariate regression analyses showedthat urinary KIM-1 levels had a direct correlation with H. S. Lee grade andtubulointerstitial inflammation (P¼0.004 and P¼0.011, respectively). Conclusion: In patients with IgA nephropathy, urinary KIM-1 has a significantcorrelation with histopathologic severity.

Influence of Phase Composition in TiAlSiN Hard Coatings on the Evolution of Structure and Mechanical Properties

Jeong‑Han Lee,Ik‑Hyun Oh,Jun‑Ho Jang,Ju‑Hun Kim,Sung‑Kil Hong,Hyun‑Kuk Park 대한금속·재료학회 2021 METALS AND MATERIALS International Vol.27 No.3

The aim of this study is to investigate the structural evolution and mechanical properties of TiAlSiN coatings when processedby the arc ion plating method. To form a hard coating, Ti, Al, and Si powders were mechanically alloyed by planetary ballmilling; the powders were then densely compacted during a rapid sintering process into a ternary system coating, i.e. TiAlSi. The evolution of the structural phase from a powder to a compact material is dominated considerably by phase states suchas a supersaturated solid solution or intermetallic compounds. In the case of coating layers, the factors that determine thestructural evolution are associated with the phase stability of the nano-crystalline structure that in turn is associated withthe Ti/Al composition ratio. Motivated by this, we performed experiments to investigate the distribution of microstructures;the material’s binding energy, quantitative properties, transformation of crystal structure, and distribution of amorphous/crystalline were all recorded. In particular, the relationship between the physical and chemical properties during the coatingprocess is considered to be the dominant factor controlling the orientation and morphology of that zone (1, T, and 2). TheTiAlSiN coating layer was found to have hardness above 45 GPa and an adhesion above 100 N. In other words, understandingthe evolution and structure of TiAlSin helped us to produce a material with excellent properties that can be used as a hardcoating. Specifically, these properties were induced by a grain refinement of the nano-crystalline structure that correspondsto an increase in the silicon nitride contents.

Circuit Weight Training이 중년남성의 체격 및 체력에 미치는 영향

김연,김정주,고인태 경희대학교 체육과학연구소 1996 體育學論文集 Vol.24 No.-

The purpose of this study was to investigate the effect of circuit weight training on the physique, physical fitness. 20 middle ages man at B leisure town were selected as subject and then divided into two group; The forties group with 10 persons, fifties group with 10 persons. circuit weight training was three times a week for the period 8 weeks. To evaluate the charge of physique, skinfolds, muscular strength each group was measured. The pre test was enforced before taking the experiment, and the post test was operated after taking the experiment 8 weeks later. The results were as follows; 1.Significant change was increased in chest girth of forties group 2.54%(p〈.05), non significant change was fifties group 0.26%, significant change increased in the thigh girth of forties group 2.50%(p〈.001), fifties group 4.43(p〈.01), and non significant change was decreased in the waist girth of forties group 0.54, significant change was fifties group 1.24%(p〈.05) by after 8 weeks. 2.Significant change was decreased in triceps of forties group 16.81 (p〈.01), fifties group 18.10%(p〈.01), non significant change was in the abdomen of forties group 2.89%, significant change was in fifties group 5.02%(p〈.01), subscapular in the forties group 12.50%(p〈.01), fifties group 19.25%(p〈.01) after 8 weeks, and total thickness of forties group 13.93(p〈.01), fifties group 12.80%(p〈.01), significant change was increased in the body density of forties group 0.51%(p〈.05), fifties group 2.31%(p〈.01), LBM of forties group 2.86%(p〈.05), fifties group 0.2.31%(p〈.01), significant change was decreased in %Fat of forties group 11.91%(p〈.01), fifties group 8.60%, Fat of forties group 12.93%(p〈.01), fifties group 9.37%(p〈.01) by after 8 weeks. 3, Significant change was increased in the grip strength of forties group 8.64%(p〈.05), fifties group 6.24%(p〈.01), back strength of forties group 12.65%(p〈.01), fifties group 10.63%(p〈.01), trunk flexion of forties group 20.18%(p〈.001), fifties group 22.55%(p〈.01), non significant change was increased in the trunk extension of forties group 5.56%, fifties group 4.43% by after 8 weeks. In conclusion circuit weight training is effective as the method of all-round development physique, physical fitness.