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농작물 해충 및 진균류 방제를 위한 방선균의 분리 및 동정
이은정,강경돈,황교열,김두호,김신덕,성수일 한국잠사학회 1998 한국잠사곤충학회지 Vol.40 No.1
Twenty seven out of ca. 5,000 actinomycete strains, which were isolated from soil collected throughout the country, showed antimicrobial effects against fungi, Rhizopus stronifer (ATCC6227a), Rhizoctonia solani (KCCM 11271) and yeast, Candida albicans(ATCC10231). From these antifungal microorganisms, we further selected seven strains which seemed to produce insecticidal substances with in vivo test, using silkworm, Bombyx mori and beet armyworm, Spodoptera exigua. Morphological and biochemical experiments revealed that three strains out of seven were streptomyces. Further investigations on the physical and chemical properties of these antifungal and insecticidal substances are now in progress.
CASE REPORT : Primary Pulmonary Malignant Melanoma: An Unexpected Tumor
( Kyo Bum Hwang ),( Ki Eun Hwang ),( Jae Wan Jung ),( Su Jin Oh ),( Mi Jeong Park ),( Young Hoon Jeong ),( Keum Ha Choi ),( Eun Taik Jeong ),( Hak Ryul Kim ) 대한결핵 및 호흡기학회 2015 Tuberculosis and Respiratory Diseases Vol.78 No.3
Malignant melanoma occurs most frequently on the skin. However, it can also arise in other organs and tissues of the body. Primary pulmonary malignant melanoma is a very rare non-epithelial neoplasm accounting for 0.01% of all primary pulmonary tumors. The treatment of choice is surgical resection of the tumor with an oncologically adequate margin as in lobectomy or pneumonectomy. The prognosis of this condition is rather poor. Based on previous data, its 5-year survival is at least 10%. Here, we report a case of an 82-year-old woman whose primary pulmonary melanoma was detected incidentally.
Poster Session : PS 0639 ; Respiratory Medicine ; Primary Pulmonary Malignant Melanoma; The Expected
( Kyo Bum Hwang ),( Ki Eun Hwang ),( Eun Taik Jung ),( Hak Ryul Kim ) 대한내과학회 2014 대한내과학회 추계학술대회 Vol.2014 No.1
Malignant melanoma is a malignant tumor, arising from the pigment producing cells of the deeper layers of the skin. It accounts for 1.5% of all reported cancer. It occurs most frequently on the skin, but also occurs in other organs and tissues of the body. However, Melanoma of the lung without evidence of extra-pulmonary disease, primary pulmonary melanoma, is very rare. Herein, we report a case of 82-year-old woman in whom primary pulmonary melanoma was detected incidentally. A 82-year-old woman was found to have an incidental fi nding of a solitary mass in right lower lobe of the lung. Chest CT showed an about 8cm sized heterogeneous enhancing mass lesion in the right lower lobe. Bronchoscopic examination showed a black pigmented mass in right lower lobe posterobasal segment, and biopsy was performed. Histopathological examination of the biopsy specimen showed melanoma cells containing melanin granules and “nesting” of melanoma cells just beneath the bronchial epithelium. The melanoma cells are round or spindled shape with melanin pigmentation and these tumor cells are positive for HMB-45, vimentin. The patient had no past history of skin lesion, and did not have any skin, ear or occular lesions. Gastrointestinal endoscopy, colonoscopy and gynecologic examination were performed, and no possible primary tumor was detected. Therefore, she was fi nally diagnosed with primary malignant melanoma when considering these currently proposed criteria for primary pulmonary melanoma. Although rare, primary pulmonary malignant melanoma should be considered in the differential diagnosis of primary bronchial tumor of the lung as an extremely rare alternative.
Primary Pulmonary Malignant Melanoma: An Unexpected Tumor
Hwang, Kyo-Bum,Hwang, Ki-Eun,Jung, Jae-Wan,Oh, Su-Jin,Park, Mi-Jeong,Jeong, Young-Hoon,Choi, Keum-Ha,Jeong, Eun-Taik,Kim, Hak-Ryul The Korean Academy of Tuberculosis and Respiratory 2015 Tuberculosis and Respiratory Diseases Vol.78 No.3
Malignant melanoma occurs most frequently on the skin. However, it can also arise in other organs and tissues of the body. Primary pulmonary malignant melanoma is a very rare non-epithelial neoplasm accounting for 0.01% of all primary pulmonary tumors. The treatment of choice is surgical resection of the tumor with an oncologically adequate margin as in lobectomy or pneumonectomy. The prognosis of this condition is rather poor. Based on previous data, its 5-year survival is at least 10%. Here, we report a case of an 82-year-old woman whose primary pulmonary melanoma was detected incidentally.
알칼리 용제를 이용하여 제조한 셀룰로오스 겔의 카드뮴 흡착특성
황교정(Kyo-Jung Hwang),권구중(Gu-Joong Kwon),양지욱(Ji-Wook Yang),황원중(Won-Jung Hwang),황재현(Jae-Hyun Hwang),김대영(Dae-Young Kim) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.6
This study was carried out to investigate the characterization of cadmium adsorption by cellulose hydrogel and aerogel. Hydrogel and aerogel were made from ashless pulp dissolved in alkali hydroxide-urea aqueous solution and manufactured in film and bead types. After regeneration of cellulose, hydrogel went through the process of substitution of organic solvent and freeze-dry in order to make aerogel. SEM was used to analyze the microstructure of hydrogel and aerogel. Experiment was conducted in various concentrations and pH conditions to find out the characteristic of cadmium adsorption. After that, EDS was used to identify existence and distribution of cadmium in hydrogel and aerogel. The result from comparisons of cadmium adsorption shows that bead type aerogel has the maximum cadmium adsorption and film type hydrogel has the minimum cadmium adsorption.
황윤정(Yoon Jung Hwang),박영화(Young Hwa Park),서영교(Young Kyo Seo),서광교(Gwang Kyo Seo),백성옥(Sung Ok Baek) 大韓環境工學會 2010 대한환경공학회지 Vol.32 No.5
프탈레이트 화합물은 PVC 수지 등의 가소제로 널리 사용되며, 내분비계장애 및 돌연변이를 유발하는 물질로서 이에 대한 독성은 널리 알려져 있다. 우리나라에서는 소비자용품이나 음용수에서의 프탈레이트 화합물에 대한 측정 사례는 찾아 볼 수 있으나, 대기환경분야에서의 측정사례는 전무한 실정이다. 본 연구에서는 환경대기 중의 프탈레이트 화합물을 측정하기 위해 고용량샘플러로 시료를 채취한 후 속슬렛 장치로 추출하여 GC/MS로 분석하였다. 일부 시료에 대하여 저용량공기채취법과 고용량공기채취법을 동시에 적용하여 두 측정 결과를 비교 평가하였다. 분석대상 항목은 dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), butyl benzyl phthalate (BBP), di(2-ethylhexyl) phthalate (DEHP) 및 di-n-octyl phthalate (DOP) 등 6개 항목을 선정하였다. 입자상 시료 채취를 위해서는 석영섬유여지를 사용하였으며, 기체상 시료 채취에는 PUF/XAD-2를 사용하였다. 실험실 정도관리 평가 결과 표준시료에 대한 선형성과 재현성은 우수한 결과를 나타내었으며, 정량검출한계는 항목에 따라 대기 중 농도로 환산하여 0.60~17.84ng/m3 수준으로 추정되었다. 또한 실제 현장평가를 위해 2007년 1월과 6월에 시화·반월공단 (정왕2동, 원시동)에서 측정한 결과 비교적 분자량이 작고 끓는점이 낮은 DMP, DEP, DBP는 기체상에 많이 존재하며, DBP 보다 분자량이 크고 끓는점이 높은 DEHP와 DOP는 입자상에 주로 존재하는 것으로 나타났다. DEHP는 45.7ng/m3~1012.7ng/m3, DMP는 7.7ng/m3~375.1ng/m 수준으로 검출되었다. 전반적으로 볼 때 환경대기 중의 프탈레이트 화합물 측정에는 고용량시료채취법이 저용량법보다 우수한 것으로 나타났다. Phthalate compounds are widely used as plasticizers in polyvinyl chlororide (PVC) resins and other industrial consumer products, and some of them are known to be endocrine disruptors. In Korea, a number of studies have been carried out for the measurement of phthalates in consumer products and drinking water. However, no data are available for those compounds in the ambient air where the general public are routinely exposed. In this study, we evaluated sampling and analytical methods for the determination of phthalates in the ambient atmosphere. A wide range of phthalates compounds were included in the target analytes, which are dimethyl phthalate (DMP), diethyl phthalate (DEP), di-n-butyl phthalate (DBP), butyl benzyl phthalate (BBP), di(2-ethylhexyl) phthalate (DEHP), and di-n-octyl phthalate (DOP). Most of samples were collected using a high volume sampler with a PUF/XAD-2 column/quartz fiber filter and then analyzed by GC/MS. Some of samples were simultaneously collected on XAD-2 using a low-volume sampler, together with high-volume samples. The analytical method applied in this study showed good repeatability and linearity. Quantitative detection limits were estimated from 0.60 to 17.84ng/m3 in air, depending on individual compounds. The field measurements were carried out at 3 sites located in Sihwa- Banwall industrial areas and a suburban area from January 2007 to November 2007. From the field experiments, DEHP, DMP and DBP appeared to be the most abundant compounds in the ambient air. It was also found that DMP, DEP and DBP were mainly distributed in the vapor phase, while BBP, DEHP and DOP were predominantly associated with the particulate phase. The concentrations of DEHP and DMP in the industrial areas ranged from 45.7 to 1,012.7ng/m3 and from 7.7 to 375.1ng/m3, respectively. Overall, the high-volume sampling method was demonstrated to be superior to the low-volume method for the determination of phthalates in the ambient atmosphere.
LiOH/Urea 수용액을 이용하여 제조한 재생 셀룰로오스 겔의 공극분포 및 중금속 흡착 특성
권구중(Gu-Joong Kwon),양지욱(Ji-Wook Yang),황교정(Kyo-Jung Hwang),황재현(Jae-Hyun Hwang),황원중(Won-Jung Hwang),김대영(Dae-Young Kim) 한국펄프·종이공학회 2016 펄프.종이기술 Vol.48 No.4
This experiment was carried out to study the pore distribution of regenerated cellulose gel (RCG) prepared by using a LiOH/urea solution and the adsorption characteristics of a lead and cadmium. The specific surface area of RCG was higher in the 2% cellulose concentration with a higher number of beads type than the film type. In the case of pore distribution, they were between 50-150 nm of film type RCG. However, large pore, which are more than 150 nm also existed on the beads type RCG. The adsorption characteristics of cadmium and a lead showed the removal efficiency of the beads type RCG was superior to the film type RCG. The heavy metal removal, based on a pH value of 5-6, showed slightly higher efficiency. Moreover, the rate of removal of lead appeared highly comparable with that of cadmium. According of the FT-IR spectrum analysis, heavy metal adsorption of RCG appeared to be due to the absorption of heavy metals by the hydroxyl group within the cellulose.
LiBr 수용액으로 용해시켜 제조한 거대억새 홀로셀룰로오스 용해 및 재생 필름특성
양지욱(Ji-Wook Yang),권구중(Gu-Joong Kwon),황교정(Kyo-Jung Hwang),황원중(Won-Jung Hwang),황재현(Jae-Hyun Hwang),김대영(Dae-Young Kim) 한국펄프·종이공학회 2015 펄프.종이기술 Vol.47 No.6
In this study, dissolution characteristics of 60% LiBr aqueous solution for Miscanthus sinensis holocellulose in accordance with heating time and characteristics of regenerated films were analyzed. Miscanthus sinensis holocellulose was made by peracetic acid method. During the dissolution of 60% LiBr solution for the holocellulose, the dissolution was started from the tip of the cellulose fiber after about 7 minutes, and proceeded as it swollen like a balloon. A lot of Si was identified by analyzing hollocellulose regenerated film through SEM/EDS. Cross section of regenerated film as dissolution time till 40 minutes of dissolution showed multilayered structure and fiber orientation. But after 40 minutes, multilayered structure and fiber orientation was not observed. The crystal structure of the holecellulose was transformed cellulose I into cellulose II. Therefore, dissolution for 20 minutes with 60% LiBr solution in the condition of 190℃ hot plate was shown as an optimum condition to manufacture the holocellulose regenerated film.