원유의 미생물적 유화

차미선,손홍주,이건,고명선,이상준,이종근 부산대학교 환경문제연구소 1996 環境硏究報 Vol.14 No.1

Microorganisms producing bioemulsifier were isolated from the sea water in Pusan costal aera. The isolated strain which had the highest emulsification activity and stability was identified as the genus Acinetobacter from the results of morphological, cultural and biochemical tests and named Acinetobacter sp. EL-C6 for convinience. The compositions of optimum medium for emulsification of crude oil by Acinetobacter sp. EL-C6 were crude oil 2%, NH_4NO_3 0.2%, K_2HPO_4 0.01%, MgSO_4·7H_2O 1%, CaCl_2·2H_2O 0.1%, NaCl 3% and the initial pH 7.5. The cultivation for emulsification of crude oil was carried out in 500m1 shaking flask containing 100m1 of the optimum medium at 30℃. The highest emulsification was observed after 5 days. The utilization on the various hydrocarbon of the Acinetobacter sp. EL-C6 was showed that the utilization of n-alkane compounds were better than that of aromatic compounds. Among the petroleum compounds, by Acinetobacter sp. EL-06.

난분해성 폐수처리를 위해 Bioaugmentation한 생물막 반응기에 관한 연구

이건,김희,조순자,박근태,차미선,이상준 부산대학교 환경문제연구소 2002 環境硏究報 Vol.20 No.-

The effect on the stability of biofilm and phenol removal efficiency under high phenol loading was investigated by RBC(Rotating Biological Contactor) using augmented reactor and unaugmented reactor with Rhodococcus sp. EL-GT. The operation of RBCs was carried out at rotating speed of 10 rpm and hydraulic retention time of 7 h at 20℃. The maximum amount of dry weight of the biofilm was 0.04 g/㎠ to running time for 15 days. The amount of attached biofilm of contactors was stabilized as 0.15∼0.03 g/㎠ for 35 days' running times and that of two reactors was similar value. But unaugmented reactor was shocked at 1,200 mg/ℓ phenol loading that the biofilm and removal efficiency were impacted. The bioaugmentation reactor showed higher removal rates than unaugmented reactors about phenol, sCOD and nitrogen contents. Bioaugmentation, with the strain originating from the same ecosystem and growing effectively on a selective substrate, was often effective means to treatment of recalcitrants like as phenol wastewater.

부산지역 매출액 상위기업의 위상과 변천사

정성문 · 정지미 · 이규용 · 김건우 · 김권호 · 박수정 · 양태완 · 지준영 · 이우평 신라대학교 부산학연구센터 2020 부산연구 Vol.18 No.2

본 연구는 부산지역의 주요기업 변화를 살펴보기 위해 매출액 기준 전국 상위 1,000대 기업에 속하는 부산기업을 조사하여 비교분석을 실시하였다. 분석결과 2005년에 전국 1,000대 기업 중 46개 기업이 부산에 소재하였는데, 2019년에는 12 개가 줄어든 34개 기업만이 전국 1,000대 기업에 포함되었다. 또한, 전국 상위 1,000대 기업의 매출액 기준으로 부산지역 기업의 매출액 비중은 2005년 1.6%에서 2019년 1.4%로 줄어든 것으 로 나타났다. 이는 수도권 집중현상이 점차 강화되고 있기 때문이다. 한편, 부산지역 매출액 기준 상위 10대 기업은 많은 변화가 있었는데, 2005년 상위 10대 기업 중 2019년에도 상위 10대 기 업에 포함된 기업은 ㈜한진중공업, 르노삼성자동차(주), ㈜부산은행, ㈜서원유통 등 4개뿐인 것 으로 나타났다. 통계적 인과 관계는 확정할 수 없으나 지역 대기업의 쇠퇴 및 유출과 지역의 쇠퇴가 동시에 이루어지고 있어 지역 경제의 침체와 대기업의 쇠퇴 및 유출이 상당한 관계가 있음을 유추해 볼 수 있다. 특히 2011년 이후 지역 주력 제조업 기업들이 1000대 기업 진입에 실패하였다는 점을 주목해 볼 필요가 있다. 지역 제조업 대기업의 이탈 또는 쇠퇴는 지역 생산성 하락에 영향을 미 쳤을 가능성이 높고, 낮아진 지역 산업 생산성이 지역 경제성장률 둔화에도 영향을 미칠 가능성 이 있다. 따라서 지역의 경제활력 저하 문제를 제고하기 위해서는 지역 산업구조 개편 문제와 생 산성 향상 방안에 대한 고민이 필요하다.

야뇨증 환아들의 심리사회적 특성에 대한 다기관 연구 : 행동 및 정서 문제를 중심으로

조수철,김재원,신민섭,황준원,한상원,박관현,이상돈,김경도,김건석,서홍진,이유식,정재용,김영균,문두건,남궁미경,한창희,조원열,김영식,배기수,이종국,정우영,신의진 大韓神經精神醫學會 2005 신경정신의학 Vol.44 No.6

Objectives : The aim of this study was to examine the behavioral and emotional problems associated with nocturnal enuresis in Korean children. Methods : Three hundred eighteen children with nocturnal enuresis, together with their parents, completed the Child Behavior Checklist (CBCL), Disruptive Behavior Disorder Scale according to DSM-IV (DBDS), Children's Depression Inventory (CDI), State-Trait Anxiety Inventory for Children (STAIC), and Piers-Harris Children's Self-Concept Scale (PHCSC). Ninety-three normal students were selected as the control group. Results : Compared to the normal control group, the mean scores with regard to the withdrawn, social problems, attention problems, delinquent behavior, aggressive behavior, externalizing problems and total problems profiles were significantly higher in the nocturnal enuresis group according to the CBCL results. The nocturnal enuresis group also scored significantly higher in the ADHD and ODD profiles of the DBDS. The nocturnal enuresis group was more depressed and anxious than the control group according to the results of the CDI and STAI. The mean score of the PHCSC was significantly lower in the nocturnal enuresis group when compared to the normal control group. Conclusion : The results of this study suggest that children with nocturnal enuresis in Korea have clinically relevant behavioral and emotional problems. The findings support the link between nocturnal enuresis and psychopathology in Korean children.

상악동에 발생한 국균증 2례

조용석,김경원,박현진,강지연,이건국,신향미 충북대학교 의학연구소 2001 忠北醫大學術誌 Vol.11 No.1

국균증은 토양, 유기체 그리고 모든 형태의 유기물 잔사에 광범위하게 존재하는 국균 (Aspergillus) 속에 의하여 발병한다.이 균의 포자는 공기 중에서 전염될 수 있으므로 가장 흔한 감염 진균 중 하나이다.부비동에 발생한 국균증은 초기 임상 증상이 만성 부비동염과 유사하며, 방사선 사진 등을 이용한 검사상도 일반 세균성 감염과 구별하기가 매우 어렵다.대개는 병리조직학적 검사로 국균을 확인해서 확진을 내리게된다.국균증의 치료는 외과적으로 상악동내의 병소를 완전히 제거하고 비강에로 충분한 공기를 통기시키는 것이 가장 중요하며 보조적으로 전신적인 항진균제를 사용해야한다. 증례는 40세와 24세인 여자 환자들로서 전신적으로는 건강했으며 임상적 방사선적으로 만성 상악동 증세를 보였다.상악동 근치술을 시행하면서 국균종으로 여겨지는 암갈색 덩어리들이 관찰되었고 술 후 병리조직검사상 국균증으로 진단되었다.국균증으로 진단 후 보조적으로 전신적 항진균제를 투약하였으며 재발없이 치유되었다. Aspergillus is a fungus of the Acetomyces class that is most commonly encountered in the human environment.Aspergillosis of the maxillary sinus is not common and it requires special consideration to diagnose and eradicate. The disease is characterized by a wide range of initial symptoms, and should be considered as a possible diagnosis in sinusitis refractory to antibiotics and antral lavage. Generally the diagnosis of sinus aspergillosis can be confirmed by histologic examination, however, characteristic radiographic appearance such as coherene of radiodense sinus concretions can be found by careful examination of the radiograms. The choice of treatment of maxillary sinus aspergillosis is radical surgery with adjunctive systemic antifungal therapy. We experienced two cases of maxillary sinus aspergillosis, which initially diagnosed as chronic maxillary sinusitis and showed a necrotic mass intraoperatively and histologically diagnosed as aspergillosis.We reports theses cases with review of literature.

Decreased blood pressure associated with in-vehicle exposure to carbon monoxide in Korean volunteers

Lee, Geon-Woo,Bae, Mun-Joo,Yang, Ji-Yeon,Son, Jung-Woo,Cho, Jae-Lim,Lee, Sang-Gyu,Jang, Bo-Mi,Lee, Hyun-Woo,Lim, Jong-Soon,Shin, Dong-Chun,Lim, Young-Wook BioMed Central 2017 Environmental health and preventive medicine.['97. Vol.22 No.-

<P><B>Background</B></P><P>Carbon monoxide (CO) is one of the primary components of emissions from light-duty vehicles, and reportedly comprises 77% of all pollutants emitted in terms of concentration. Exposure to CO aggravates cardiovascular disease and causes other health disorders. The study was aimed to assess the negative effects by injecting different amounts of CO concentration directly to human volunteers boarding in the car.</P><P><B>Methods</B></P><P>Human volunteers were exposed to CO concentrations of 0, 33.2, and 72.4 ppm, respectively during the first test and 0, 30.3, and 48.8 ppm respectively during the second test while seated in the car. The volunteers were exposed to each concentration for approximately 45 min. After exposure, blood pressure measurement, blood collection (carboxyhemoglobin [COHb] analysis), medical interview, echocardiography test, and cognitive reaction test were performed.</P><P><B>Result</B></P><P>In patients who were exposed to a mean concentration of CO for 72.4 ± 1.4 ppm during the first exposure test and 48.8 ± 3.7 ppm during the second exposure test, the COHb level exceeded 2%. Moreover, the diastolic blood pressure was decreased while increasing in CO concentration after exposure. The medical interview findings showed that the degree of fatigue was increased and the degree of concentration was reduced when the exposed concentration of CO was increased.</P><P><B>Conclusion</B></P><P>Although the study had a limited sample size, we found that even a low concentration of CO flowing into a car could have a negative influence on human health, such as change of blood pressure and degree of fatigue.</P>

Dry Weight and Inorganic Nutrient Contents in Different Parts of Container-Grown Highbush Blueberry ‘Duke’ with or without Hydroponic Solution Supply

Mi Geon Cheon,Seo Hyoun Lee,Kyung Mi Park,Seong-Tae Choi,Yeon Hyeon Hwang,Young Ho Chang 한국토양비료학회 2021 한국토양비료학회지 Vol.54 No.3

This experiment was conducted to understand nutrient uptake of container-grown highbush blueberries in plastic film house. In March 2013, one-year-old ‘Duke’ was planted in a 180-L container mixed with peatmoss (130 L) and perlite (40 L), and hydroponic solution was supplied (fertilization) or not (non-fertilization) until October 2020. Hydroponic solution consisted of NO₃-N 4.6, NH₄-N 3.4, PO₄-P 3.3, K 3, Ca 4.6, and Mg 2.2 mmol L<SUP>-1</SUP> and the non-fertilization was supplied with only underground water. In October 2020, total dry weight of a blueberry increased 1.5-fold more in the fertilization than in the non-fertilization. Dry weight and inorganic nutrient content were the greatest in root than in leaf, shoot, old branch, and cane, indicating importance of root as a reserve storage organ. Fertilization increased dry weight by 2-fold and inorganic nutrient contents of root by 2.2 - 2.6-fold. Total content of each nutrient in a bush increased 1.8 - 2.2-fold more by the fertilization. In non-fertilized treatment, maintaining dry weight and nutrient contents for 8 years indicated that plants absorbed the nutrients to some extent through mineralization of peatmoss medium and underground water.

Soil Chemical Properties and Bush Growth of Two Blueberry Cultivars as Affected by Soil Media Mixed with Peatmoss and Cocopeat

Mi Geon Cheon,Seo Hyoun Lee,Kyung Mi Park,Seong-Tae Choi,Yeon Hyeon Hwang,Young Ho Chang 한국토양비료학회 2021 한국토양비료학회지 Vol.54 No.3

This experiment was conducted to evaluate the usefullness of cocopeat as a soil medium in blueberry cultivation. Two-year-old northern highbush blueberry ‘Duke’ and southern highbush blueberry ‘Spring High’ were planted in soil medium mixed with peatmoss (soil:peatmoss (v/v), 1:1) or cocopeat (soil:cocopeat (v/v), 1:1) in open fields in 2019. Soil pH measured in 2020 and 2021 ranged from 4.2 to 5.0 in peatmoss and 5.2 to 5.8 in cocopeat medium, indicating peatmoss has more suitable pH for blueberry growth. Two years soil analyses indicated that peatmoss medium tended to contain a higher available P2O5 content and lower exchangeable cations compared with those of cocopeat. In 2021, peatmoss medium significantly increased the number of shoots per bush, by 16% for ‘Duke’ and 92% for ‘Spring High’ compared with the cocopeat. Bushes from peatmoss medium produced yield 1.9- to 2.7-fold higher for two years in ‘Duke’ and 1.4- to 1.8-fold higher in ‘Spring High’ compared with respective yields from cocopeat. Fruit characteristics for two years were not consistently affected by different soil media, except that the acidity was slightly higher in peatmoss. The results suggested that since the better bush growth from peatmoss medium resulted mainly from lower soil pH, the use of cocopeat as a soil medium should be followed by pH adjustment.

The Artificial Cultivation of Oudemansiella mucida on the Oak Sawdust Medium

Geon Woo Lee,Chandana Jaysinghe,Ahmed Imtiaj,Mi Ja Shim,Hyun Hur,Min Woong Lee,Kyung Rim Lee,Seong Hwan Kim,Hye Young Kim,U Youn Lee,Tae Soo Lee 한국균학회 2007 Mycobiology Vol.35 No.4

Characteristics and suitability of various cereal grains in spawn production of button mushroom

Lee, Byung-Joo,Lee, Mi-Ae,Kim, Yong-Gyun,Lee, Kwang-Won,Lee, Byung-Eui,Seo, Geon-Sik The Korean Society of Mushroom Science 2014 한국버섯학회지 Vol.12 No.4

Spawn is the vegetative growth of the mycelium and serves as the inoculum or seed for cultivating mushrooms. Various cereal grains, such as wheat, millet, barley, sorghum, brown rice, rye, and oat were assessed to compare their characteristics and suitability for spawn production of button mushroom (Agaricus bisporus). The mycelial growth rates, density, and the number of completely colonized grains were measured from the twentieth day of inoculation. Wheat grains showed fastest mycelial growth with 8.4 cm followed by rye, oat, barley with 8.2, 7.5 and 7.3 cm, respectively. In the mycelial density, foxtail millet, barley, and sorghum were best compared with that of wheat grains. Especially, the number of grains which were completely colonized by mycelia were greatest in foxtail millet with 5,123 grains followed by proso millet, and wheat with 3,052 and 914, respectively. Based on the results obtained, barley, foxtail millet, and sorghum grains would be appropriate substituting for wheat grain in spawn production of button mushroom.