Evaluation for Impacts of Nitrogen Source to Groundwater Quality in Livestock Farming Area

Gyeong-Mi Lee,Sunhwa Park,Ki-In Kim,Sang-Ho Jeon,Dahee Song,Deok-hyun Kim,Tae-Seung Kim,Seong-Taek Yun,Hyen Mi Chung,Hyun-Koo Kim 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.5

We investigated 52 livestock farming complexes in Gyeong-Gi and Incheon provinces based on low, medium, and high livestock density and groundwater quality. The objective of this study was to evaluate a relationship between nitrate N concentration in groundwater and animal factors, such as livestock density and animal species. 2,200 groundwater samples for 3 years from 2012 to 2014 at Gyeong-Gi and Incheon provinces were collected and analyzed for pH, EC, DO, ORP, temperature, major anions and cations, such as NO₃-N, HCO₃<SUP>-</SUP>, PO₄<SUP>-</SUP>, SO₄<SUP>2-</SUP>, Cl<SUP>-</SUP>, NH₄-N, K<SUP>+</SUP>, Na<SUP>+</SUP>, Ca<SUP>2+</SUP>, Mg<SUP>2+</SUP>, T-N, and TOC. Average concentration of total N for generated load density was 23,973 g day<SUP>-1</SUP> km<SUP>-2</SUP> for cattle, 51,551 g day<SUP>-1</SUP> km<SUP>-2</SUP> for pig, and 52,100 g day<SUP>-1</SUP> km<SUP>-2</SUP> for poultry. For animal feeding species, average ratio for generated load over discharge load was 16.1% for cattle, 7.8% for pig, and 7.1% for poultry. Therefore, cattle feeding region is highly vulnerable for water pollution compared to pig and poultry feeding areas. The concentrations of chloride, nitrate, and total N in the groundwater samples were higher at high animal farming regions than other regions. The average concentration of nitrate, and chloride in groundwater samples was 5.0 mg L<SUP>-1</SUP>, 16.6 mg L<SUP>-1</SUP> for low livestock density, 6.9 mg L<SUP>-1</SUP>, 17.7 mg L<SUP>-1</SUP> for medium livestock density and 7.6 mg L<SUP>-1</SUP>, 22.7 mg L<SUP>-1</SUP> for high livestock density and total nitrogen (T-N) was 7.7 mg L<SUP>-1</SUP> for low livestock density, 9.4 mg L<SUP>-1</SUP> for medium livestock density, 10.7 mg L<SUP>-1</SUP> for high livestock density. In conclusion, based on this research, for managing groundwater quality near livestock farming regions, Ca-(Cl+NO₃) group from the Piper diagram is more efficient than using 19 factors for water quality standard.

Evaluation for Impacts of Nitrogen Source to Groundwater Quality in Livestock Farming Area

Lee, Gyeong-Mi,Park, Sunhwa,Kim, Ki-In,Jeon, Sang-Ho,Song, Dahee,Kim, Deok-hyun,Kim, Tae-Seung,Yun, Seong-Taek,Chung, Hyen Mi,Kim, Hyun-Koo 한국토양비료학회 2017 한국토양비료학회지 Vol.50 No.5

We investigated 52 livestock farming complexes in Gyeong-Gi and Incheon provinces based on low, medium, and high livestock density and groundwater quality. The objective of this study was to evaluate a relationship between nitrate N concentration in groundwater and animal factors, such as livestock density and animal species. 2,200 groundwater samples for 3 years from 2012 to 2014 at Gyeong-Gi and Incheon provinces were collected and analyzed for pH, EC, DO, ORP, temperature, major anions and cations, such as $NO_3-N$, ${HCO_3}^-$, ${PO_4}^-$, ${SO_4}^{2-}$, $Cl^-$, $NH_4-N$, $K^+$, $Na^+$, $Ca^{2+}$, $Mg^{2+}$, T-N, and TOC. Average concentration of total N for generated load density was $23,973g\;day^{-1}\;km^{-2}$ for cattle, $51,551g\;day^{-1}\;km^{-2}$ for pig, and $52,100g\;day^{-1}\;km^{-2}$ for poultry. For animal feeding species, average ratio for generated load over discharge load was 16.1% for cattle, 7.8% for pig, and 7.1% for poultry. Therefore, cattle feeding region is highly vulnerable for water pollution compared to pig and poultry feeding areas. The concentrations of chloride, nitrate, and total N in the groundwater samples were higher at high animal farming regions than other regions. The average concentration of nitrate, and chloride in groundwater samples was $5.0mg\;L^{-1}$, $16.6mg\;L^{-1}$ for low livestock density, $6.9mg\;L^{-1}$, $17.7mg\;L^{-1}$ for medium livestock density and $7.6mg\;L^{-1}$, $22.7mg\;L^{-1}$ for high livestock density and total nitrogen (T-N) was $7.7mg\;L^{-1}$ for low livestock density, $9.4mg\;L^{-1}$ for medium livestock density, $10.7mg\;L^{-1}$ for high livestock density. In conclusion, based on this research, for managing groundwater quality near livestock farming regions, $Ca-(Cl+NO_3)$ group from the Piper diagram is more efficient than using 19 factors for water quality standard.

Isolation of Megastigmane Sesquiterpenes from the Silkworm (Bombyx mori L.) Droppings and Their Promotion Activity on HO-1 and SIRT1

Ji-Hae Park,Do-Gyeong Lee,Seung-Woo Yeon,Hyuk-Sang Kwon,Jong-Hee Ko,Dong-Jin Shin,Han-Sol Park,Yong-Soon Kim,Myun-Ho Bang,NAM-IN BAEK 대한약학회 2011 Archives of Pharmacal Research Vol.34 No.4

The silkworm (Bombyx mori L.) droppings were extracted with 80% aqueous MeOH, and the concentrated extract was partitioned in succession with EtOAc, n-BuOH, and H_2O. From the EtOAc fraction, five megastigmane sesquiterpenes were isolated through repeated silica gel and ODS column chromatography. According to the results of spectroscopic data, such as NMR, MS, and IR, the chemical structures of the isolated compounds were determined as (3S,5R,8R)-3,5-dihydroxymegastigma-6,7-dien-9-one (1), (S)-dehydrovomifoliol (2), (6R,7E,9R)-9-hydroxy-4,7-megastigmadien-3-one (3), (3S,5R,6S,7E)-3,5,6-trihydroxy-7-megastigmen-9-one (4), (6R,9R)-9-hydroxy-4-megastigmen-3-one (5). Compounds 2 through 5 were isolated for the first time from silkworm droppings. GC/MS analysis indicated silkworm powder contained compound 3, and mulberry leaves contained compound 4. Compounds 1 and 5 increased the expression of heme oxygenase-1 and SIRT1 in HepG2 and HEK239 cells, respectively. Heme oxygenase-1 is considered to be an antioxidant enzyme that catabolizes heme to carbon monoxide, free iron and biliverdin, while SIRT1 is the mammalian homologue of the yeast silent information regulator (Sir)-2, which are involved in the suppression of inflammatory mediators or factors that may be used to improve atopy-related symptoms.

경상북도 후포와 강원도 장호에서 정치망으로 채집된 어류 종조성 비교

강정하 ( Jung Ha Kang ),김이경 ( Yi Gyeong Kim ),박중연 ( Jung Youn Park ),김진구 ( Jin Koo Kim ),유정화 ( Jung Hwa Ryu ),강충배 ( Chung Bae Kang ),박정호 ( Jeong Ho Park ) 한국수산과학회 2014 한국수산과학회지 Vol.47 No.4

Two major temperature fronts, the Subpolar (Gosung, Gang-won-do; 38°-41° N) and Thermal (Jukbyun, Gyeong-sang-buk-do; 36°-37° N) fronts, are found in the East Sea along the east coast of Korea. These are located roughly where the Tsushima Warm Current and North Korea Cold Current intersect. To clarify the effect of the Thermal Front, we investigated seasonal variation in fish species composition using set nets in two areas located north (Jangho, Gang-won-do) and south (Hupo, Gyeong-sang-buk-do) of Jukbyun, Gyeong-sang-buk-do, and compared the sea water temperature and salinity. We collected a total of 38 fish species in Hupo and 25 in Jangho. Trachurus japonicus was the most common species at both sites, but the subdominant species differed. At Hupo, the subdominant species were Konosirus punctatus and Diodon holocanthus, whereas Clupea pallasii and Scomber japonicus were subdominant at Jangho. Based on Froese and Pauly (2014), subtropical fishes accounted for 55% of fish in Hupo but only for 33% in Jangho. The difference in fish species composition was most obvious in May and August. According to the Korea Hydrographic and Oceanographic Administration, sea surface temperature and salinity were slightly higher at Hupo than at Jangho. Our findings suggest that the oceanographic boundary resulting from the Thermal Front near Jukbyun, Gyeong-sang-buk- do may have a major effect on the distribution of migratory fish species.

산업용 이차전지의 열화진단에 관한 연구

장대경,황호석,박민기 서울産業大學校 2005 논문집 Vol.54 No.3

This paper proposes a new degradation diagnosis method of secondary battery in order to improve a battery economy. In the proposed method, a bad cell is detected by the measurement of DC internal resistance and the battery capacity is estimated by the electric discharge test in a short period of time, which can be used to determine the time to replace the battery. Through the computer simulation and actual experimentation, the proposed method's validity is confirmed by comparing and analyzing the performance. As a result, we show that it is possible to estimate the accurate capacity of secondary battery in a short space of time.

65세 이상 외래 방문환자를 대상으로 한 심전도 소견

하원철,성낙일,김강,이경미,박준형,배준호,나득영 동국대학교 의학연구소 2008 東國醫學 Vol.15 No.1

The electrocardiogram is one of the most widely used diagnostic tools. Especially it is useful to the patients who have cardiovascular disease. Because elderly population are the fastest growing component of national population, I analyzed the frequencies of specific electrocardiogram findings in patients aged 65 years and older living in Gyeong-ju to collecting ECG data. Sinus bradycardia (17.0%) and Left ventricular hypertrophy (25.2%), QT prolongation (30.9%) were the most common abnormalities found in the population as a whole. Left-axis deviation (11.6% vs. 3.1%, p = 0.001) and right bundle branch block (11.9% vs. 4.1%, p= 0.001) were more common in men than women. First-atrioventricular block (2.2% vs. 5.5%, p = 0.025) and T wave abnormalities (4.1% vs. 13.2%, p = 0.001), left ventricular hypertrophy (21.6% vs. 28.0%, p = 0.049) were more common in women. QT prolongation were more common in 75 years and older (26.7% vs. 38.1%, p = 0.001). Left-axis deviation (9.4% vs. 3.9%, p = 0.024) and Right bundle branch blocks (9.8% vs. 3.0%, p = 0.003) were more common in men aged 65~74 years. Left ventricular hypertrophy (20.9% vs. 30.0%, p = 0.025) and T wave abnormalities (4.3% vs. 12.2%, p = 0.002) were more common in women aged 65~74 years. Atrial fibrillation (7.1% vs. 1.1%, p = 0.013) and left-axis deviation 17.6% vs. 2.1%, p = 0.001), Right bundle branch block (17.6% vs. 5.3%, p = 0.001) were more common in men aged 75 years and older. First-atrioventricular block (0% vs. 5.9%, p = 0.020) and T wave abnormalities (3.5% vs. 14.4%, p = 0.008) were more common in women aged 75 years and older. In conclusion, Left ventricular hypertrophy and sinus bradycardia, QT prolongation were most common electrocardiographic findings in as a whole. Left-axis deviation and right bundle branch block, fist-atrioventricular block, T wave abnormalities, QT prolongation were significantly different in age and gender. 심전도는 전 세계적으로 가장 널리 사용되는 진단적 도구로서, 특히 심혈관계 질환이 있는 환자에게 그 유용성이 크다. 현대 사회는 고령화 사회로 노인 인구에 대한 사회적, 의학적 관심이 높다. 이에 본 연구자는 노인 인구에 대한 심전도 자료를 수집하기 위해 동국대 경주 병원 외래 진료실을 방문한 65세 이상 노인 환자 737명을 대상으로 심전도 검사를 시행하였다. 좌심실 비대(25.2%), QT 간격 연장(30.9%)과 동성 서맥(17.0%)을 보인 경우가 가장 많았고, 좌축 편위 (11.6% vs. 3.1%, p = 0.001), 우각 차단(11.9% vs. 4.1%, p = 0.001)의 경우 여자 환자보다 남자 환자에서 빈도가 높았고, 1도 방실 차단(2.2% vs. 5.5%, p = 0.025)과 비정상적인 T파 양상(4.1% vs. 13.2%, p = 0.001), 좌심실 비대(21.6% vs. 28.0%, p = 0.049)의 경우 남자 환자보다 여자 환자에서 빈도가 높았다. 75세 이상 환자 군에서 QT 간격 연장(26.7% vs. 38.1%, p = 0.001)이 65세에서 74세 사이 환자 군에 비해 빈도가 높은 것 외에 유의한 차이는 없었다. 결론적으로 고령 환자에서 비정상적인 심전도 소견으로 좌심실 비대와 QT 간격 연장, 동성 서맥의 빈도가 높았으며 좌축 편위, 우각 차단, 1도 방실 차단 등은 성별, 연령대별로 유의한 차이가 있었다.

An Automated Parameter Selection Procedure for Updating Finite Element Model : Theory

Gyeong-Ho Kim(김경호),Young-jin Park(박영진),Youn-sik Park(박윤식) 한국소음진동공학회 2004 한국소음진동공학회 학술대회논문집 Vol.2004 No.5

A case of double extramammary Paget`s disease in the genitalia and axilla(초)

( Gyeong Hun Park ),( Ji Hye Yang ),( Oun Jae Park ),( Chong Hyun Won ),( Sung Eun Chang ),( Mi Woo Lee ),( Jee Ho Choi ),( Kee Chan Moon ) 대한피부과학회 2010 초록집 Vol.48 No.10

An investigation of prevalence, risk factors, and health services utilization of onychomycosis in South Korea fishing villages

( Gyeong Je Cho ),( Seong Min Hong ),( Jong Uk Kim ),( Woo Jung Jin ),( So Hee Park ),( In Ho Park ),( Jung Eun Seol ),( Jeong Ho Kim ),( Jong Soo Choi ),( Hyojin Kim ) 대한피부과학회 2019 대한피부과학회 학술발표대회집 Vol.71 No.2

Background: There have been many studies about onychomycosis (OM) with various populations. However, no study was conducted on people living in fishing villages who seem to be susceptible to OM. Objectives: The aim of this study was to investigate the prevalence, risk factor of OM in population in fishing villages in South Korea. Methods: Subjects who lived in three different fishing village in Geoje island located off the southern coast of South Korea were included in this study. Inspection was performed and mycologic examination was done for those with clinically diagnosed OM. Questionnaires regarding type of occlusive wear, hygiene habits, treatment history were surveyed. Results: Among 94 subjects enrolled, 64 (68.1%) were diagnosed as OM with inspection and causative organisms were identified in 47. DLSO was the most common clinical type (70.3%), followed by TDO (25.0%). The first finger and toenail were the most common, and more than 5 nails were involved more than half of them. Trichophyton rubrum was identified the most commonly. Wearing rubber boots was significantly related to OM (p=0.019). Among patients who experienced OM treatment, most of them answered ineffectiveness and indifference. Many of them had tried to cure only with conventional topical agents. Conclusion: The prevalence and severity of onychomycosis in fishing villages were high. Therefore, proper education and medical service for onychomycosis should be provided in association with specific occupational background.

Manufacture of Vanadium pentoxide and nickel sulfate from heavy oil fly ash

Park, Gyeong-Ho The Korean Institute of Resources Recycling 1993 資源 리싸이클링 Vol.2 No.4

This work is carried out to develop the recovery process of vanadium as vanadium pentoxide and nickel as nickel sulphate from the leaching solution of heavy oil fly ash. First, sodium chlorate solution was added to the leaching solution to oxidize vanadium ions. With adjusting pH of the solution and heating, vanadium ions(V) is hydrated and precipitated as red cake of $V_2O_5$ from the solution. After recovering vanadium, nickel is recovered as ammonium nickel sulfate with crystallization process. From this nickel salt, nickel sulfate which meets the specifications for the electroplating industry can be produced economically. More than 85% of vana-dium and nickel in the fly ash are recovered in this process.