• Korean Journal of Poultry Science
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• v.24 no.3
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• pp.117-126
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• 1997

This study was conducted to estimate the hatching and growing performance, and heterosis of Korean Native Chicken(KNC), Rhode Island Red(RIR) and KNC XRIR crossbred. A total of 1,274 female pullets were produced from KNC, RIR and KNC x RIR crossbred kept in National Live-stock Research Institute, Korea. The experiment was conducted for 20 weeks from Sep. 2, 1995 to Jan. 20,1996. Hatchabilities of KNC dark brown strain x RlR(DR), KNC light brown strain x RlR (LR) and KNC dark black strain x RlR(BR) were 77.3%, 73.6% and 72.5%, respectively. Viabilities up to 20 weeks of age were not significantly (P>0.05) different among purebreds and crossbred. Body weights of DR, LR and BR were 1,890 g, 1,849 g and 1,967 g, respectively, at 20 weeks of age. The feed conversion ratio(feed /gain) of DR, LR, and BR were 5.88, 6.07 and 5.87, respectively, up to 20 weeks of age. Average shank lengths of DR, LR and BR were 97.1 mm, 98.9 mm and 99.4 mm, respectively, at 20 weeks of age. The heterosis effects were estimated to be -0. 48%, and 12.58%, respectively, in fertility and hatchability. Up to 20 weeks of age, the heterosis effects were estimated to be 0.07%, 13.49%, -5.77%, and 3.52% in viability, body weight, feed conversion ratio, and shank length, respectively.

• Proceedings of the Korean Society of Near Infrared Spectroscopy Conference
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• 2001.06a
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• pp.1254-1254
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• 2001

Near infrared spectroscopy (NIRS) was applied to determination of the lipid content of compost during compost fermentation of tofu(soybean-curd) refuse. The reflected rays in the wavelength range between 800 and 2500 nm were measured at 2 nm intervals. The absorption of lipid observed at 4 wavelengths, 1208, 1712, 2312 and 2352 nm on the second derivative spectra. To formulate a calibration equation, a multiple linear regression analysis was carried out between the near-infrared spectral data and on the lipid content in the calibration sample set (sample number, n=60) obtained using a Soxhlet extraction method. The calibration equation for prediction of lipid, the value of the multiple correlation coefficient (R) was 0.975 when using the wavelengths of 1208 and 1712nm. To validate the calibration equation obtained, the lipid content in the validation sample set (n=35) not used for formulating the calibration equation were calculated using the calibration equations, and compared with the values obtained using the Soxhlet extraction method. Good agreement were observed between the results of the Soxhlet extraction method and those values of the NIRS method. The simple correlation coefficient (r) and standard error of prediction (SEP) were 0.964 and 0.815 %, respectively. Then, the NIRS method was applied to a compost fermentation in which the time course the lipid content were measured and good results were obtained. The study indicates that NIRS is a useful method for process management of the compost fermentation of tofu refuse.

• Korean Journal of Food Science and Technology
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• v.36 no.1
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• pp.158-161
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• 2004

To determine rapid and reliable analytical method for ochratoxin A detection in cereal-based Korean traditional foods, ochratoxin A content was measured by high-performance liquid chromatography (HPLC) with immunoaffinity column clean-up. Recoveries of ochratoxin A in tested samples ranged from 68.4 to 85.3%. Occurrences of ochratoxin A were 15, 10, and 5% for Kochujang, Deonjang, and Kanjang, respectively. None was detected in Sunsik (mixed cereals). Average levels of ochratoxin A ranged from $0.5\;to\;1.3{\mu}g/kg$, lower than maximum residue level of $5-50{\mu}g/kg$ of ochratoxin A recorded in foreign food code.

• Journal of Life Science
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• v.11 no.2
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• pp.103-110
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• 2001

This study was designed to investigate the effects of silkworm(Bombyx moril L.) powder on oxidative stress and membrane fluidity in brain membranes of rats. Sprague-Dawley(SD) male rats(160$\pm$10 g) were fed basic diet(control group), and experimental diets(SWP-200 and SWP-400 groups) added 200 and 400mg/kg BW/day for 6 weeks. There were no significant differences in cholesterol levels of brain memberanes by administration of silkworm powder (SWP). Membrane fluidities were significantly increased(21.5% and 30.8%, respectively) in brain mitochondria of SWP-200 and SWP-400 groups compared with control group, but significant difference between brain microsomes could not obtained. Basal oxygen radicals (BORs) in brain mitochondria and mircrosomes were significantly inhibited(8.5% and 16.5%, 16.8%and 24.8%, respectively) by SWP-200 and SEP-400 groups compared with control group. Induced oxygen radicals(IORs) in brain mitochondria were significantly inhibited(16.6% and 21.4%, respectively)by sWP-200 and SWP-400 groups compared with control group, but IOR in brain microsome were significantly inhibited about 16.0% by SWP-400 groups only compared with control group. Lipid peroxide(LPO) levels were significantly decreaed(14.8%and 22.4%, respectively) in brain mitochondria of SWP-200 and SWP-400 groups compared with control group, but LPO level was significantly decreased about 16.0% in brain microsome of SWP-400 group only. Oxidized protein(OP) levels were remarkably decreased(about 14.8% and 16.5%, respectively) in brain mitochondria of SWP-200 and SWP-400 groups, but OP level was significantly decreased about 13.0% in brain microsome of SWP-400 group only compared with control group, Theses results suggest that administration of in brain microsome of SWP-400 group only compared with control group. These results suggest that administration of SWP may play effective role in attenuating an oxidative stress and increasing a membrane fluidity in brain membranes.

• Korean Journal of Acupuncture
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• v.38 no.4
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• pp.275-281
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• 2021

Objectives : This study reports changes in liver function test (LFT) after Korean Medicine treatment in patients admitted to Korean Medicine hospital with abnormal LFT. The purpose of this study is to investigate the relationship between the Korean medicine treatment and abonormal LFT to verify safety of Korean medicine treatment by analyzing index of LFT. Methods : From Oct. 2015 to Sep. 2020, the result was analyzed for 91 patients admitted to the Pohang Korean Medicine Hospital and received Korean Medicine treatment. Asparate aminotransferase (AST), alanine aminotransferase (ALT) and total bilirubin (TB) were compared at admission and discharge. Results : Comparison between admission and discharge LFT showend AST decreased from 52.72±25.08 to 43.2±19.20, ALT from 70.85±32.40 to 62.13±29.40, and TB from 1.33±0.37 to 0.81±0.29. Conclusions : After Korean medicine treatment, AST, ALT, and TB decreased compared with the values at admission. Further studies on safety of Korean Medicine treatment are warranted.

• Journal of the Korean Society of Clothing and Textiles
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• v.23 no.4
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• pp.517-528
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• 1999

The purpose of this study was to obtain the basic data on clothing habits for health promotion through the investigation of clothing weight by month and season. Thirty six subjects (18 males and females twenties) were composed to obtain the clothing weight(Total clothing weight) for a year. And then clothing weight was grouped in to four seasons : spring(Mar-May) Summer(Jun-Aug) Fall(Sep-Nov) and Winter(Dec-Feb). The data of males and females were respectively divided into three groups by cluster analysis with clothing weight. 1. The clothing weight of male and female were the heaviest in jan, that of male were smallest in July female in Aug. 2. The clothing weight mean of male(996g/m2) were heavier than that of female(894g/m2) for year. The seasonal clothing weight of male culminated in Winter(1179g/m2) and decreased respectively : Spring (973g/m2) Fall(879g/m2) and summer(559g/m2) The seasonal clothing weight of female culminated in Winter (1068g/m2) and decreased respectively ; Fall(865g/m2) Spring(835g/m2) and summer(479g/m2). The seasonal clothing weight variations were significantly different in each season(p<0.01) but they were insignificantly different between Spring and Fall. middle and light. There was individual differences in the clothing weight especially large in Winter and Spring and small in Summer and Fall. 4. Lower inner clothing weight was the lowest fluctuant all around year upper outer clothing weight was the most fluctuant. So he/she controled upper outer clothing to deal with thermal environment. He/she pretended natural textiles such as cotton and wool to synthetic textiles.

• Journal of Bio-Environment Control
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• v.26 no.4
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• pp.340-345
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• 2017

Carrot leaves have many nutrients as well as roots, which will increase the demand for carrot leaves in the future. This study was carried out by dividing into two stages: high temperature and low temperature periods, in order to investigate the possibility of cultivation of carrot leaves and the composition and EC of the nutrient solution for growth and quality of carrot leaves. Composition of nutrient solution($NO_3-N:16.0$, $NH_4-N:1.0$, P: 1.0, K: 11.0, Ca: 2.0, Mg: 1.0, $SO_4-S:1.0mM{\cdot}L^{-1}$) developed by analysis of plant. In the high temperature range (From June $29^{th}$ to Sep. $8^{th}$, 2016), the concentration of the developed nutrient solution (JNU) were 1.0, 2.0, 3.0, and $4.0dS{\cdot}m^{-1}$ and the concentration of nutrient solution of Japanese Horticultural Station(JHS) $2.0dS{\cdot}m^{-1}$ was used for comparison. In the low temperature range (From Dec. $31^{st}$, 2015 to Feb. $29^{th}$, 2016), the concentration of the developed nutrient solution 1.0, 2.0, and $3.0dS{\cdot}m^{-1}$ were used. Growth was investigated in root fresh and dry weights, shoot fresh and dry weights, leaf number, and leaf area of carrot. In the high temperature range, the leaf area and shoot fresh and dry weights were good at 1.0 and $2.0dS{\cdot}m^{-1}$. The sugar content of the root was the highest at the EC $2.0dS{\cdot}m^{-1}$, and the chlorophyll content was the highest at the EC $4.0dS{\cdot}m^{-1}$. In the low temperature range, The shoot fresh and dry weights were the highest at EC 1.0 and $2.0dS{\cdot}m^{-1}$. There was no significant difference in sugar content and chlorophyll content. As a result, from the viewpoint of growth and quality of carrot, it is good to cultivate EC 1.0 and $2.0dS{\cdot}m^{-1}$ in high temperature period and low temperature period, but EC $1.0dS{\cdot}m^{-1}$ is economical perspective such as fertilizer input.

• Journal of Korean Society of Industrial and Systems Engineering
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• v.37 no.2
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• pp.35-42
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• 2014

The purpose of this study is to analyze job stress factors of hospital workers, which has an effect on their turnover intention. For identifying the influences on turnover intention, types of hospitals (university hospital, general hospital, private hospital) and types of workers(office workers, technical workers, and nursing staffs) were categorized. We went to the hospitals and carried out the survey under the cooperation with the concerned hospitals. The period of survey was from 23. Sep. 2013 to 30. Oct. 2013, and 293 worker participated in the survey. On the basis of the previous study, the measurement of job stress factors and turnover intention was set up as the survey method, and its reliability and validity were measured. The stress factors were subdivided into seven factors; occupational climate, organizational system, autonomy job control, uncertainty of getting a new job, job ability to perform, job demand, job ambiance. The value of job stress factors by the measuring instrument, Cronbach's Alpha, was 0.805 and the value of the subordination variable of turnover intention was 0.881. IBM SPSS Statistics 21 was used as the statistic analysis tool and the descriptive statistics about job stress factors. As a result, the turnover intention were analyzed depending on the types of hospitals, job groups, working years, and gender. Result shows that the job stress factors are differed according to the types of hospitals, and these job stress factors have influence on turnover intention. Therefore, it could be considered that, if the hospital managers find out the major job stress factors of their employees and resolve them in advance, the job stress of the hospital workers and their turnover intention can be reduced.

• Maxillofacial Plastic and Reconstructive Surgery
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• v.11 no.1
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• pp.1-11
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• 1989

This is a retrospective study on maxillofacial fractures. This study was based on a series of 442 patients with maxillofacial fractures treated at Dept, of oral and Maxillofacial Surgery, College of Dentistry, Chon Buk National University from Jan, 1984 to Sep. 1988. The results obtained were as follows: 1. The ratio of Male/Female was 4.8 : 1, and 3rd decade (43.9%) was the highest age group in incidence. 2. Monthly incidence was the highest in Oct,(10.6%). 3. The most frequent maxillofacial fracture site was mandible (70.0%), and zygoma & zygomatic arch (13.6%), maxilla(11.7%) and nasal bone (4.7%) were next in order of frequency. 4. Traffic accidents (47.5%), fight(24.8%) were the most common causes of maxillofacial fractures. 5. The most frequent chief complaint was painful swelling(40.7%). 6. In mandibular fractures, the most frequent fracture site was symphyseal area(28.9%) and simple fracture was the most frequent in type of fracture (71.2%). 7. In maxillary fractures, fracture with other facial bones (64.5%) was more frequent than fracture of maxilla only. The most common type of fracture was unilateral fractures(37.1%). 8. In fracture of zygoma complex, zygoma fracture was the most frequent fracture type(40.3%), zygoma and zygomatic arch fx, (30.6%), zygomatic arch fx, (29.1%) were next in order 9. Open reduction was major method of treatment in maxillofacial fractures : Mandible (77.5%), Maxilla (61.3%), Zygoma complex(43.1%). 10. Maxillofacial fractures were most frequently combined with head injury(39.3%), and lower extremities(17.0%), upper extremities(13.6%) were next in order.

• Journal of Environmental Science International
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• v.19 no.12
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• pp.1361-1374
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• 2010

The impact of urbanization on local meteorology (e.g., surface temperature, PBL height, wind speed, etc.) in the Greater Seoul Area (GSA) was quantitatively evaluated based on a numerical modeling approach during a 1-month period of 2001 (9 Sep. through 8 Oct. 2001). The analysis was carried out by two sets of simulation scenarios: (1) with the global land use and topographic data from the U.S. Geological Survey (USGS) in 1990s (i.e., LU-USGS case) and (2) with the land use data from the Environmental Geographic Information System (EGIS) along with the 3 sec elevation data from the Shuttle Radar Topography Mission (SRTM) in 2000s (i.e., LU-EGIS case). The extension of urban areas in the GSA (especially, the southern parts of Seoul) accounted for 1.8% in the LU-USGS case and 6.2% in the LU-EGIS case. For the simulations, the surface temperature and PBL height due to urbanization in the LU-EGIS case was higher (the differences of up to $0.1^{\circ}C$ and 36 m, respectively) than those in the LU-USGS case, whereas the wind speed (up to 0.3 $ms^{-1}$) in the former was lower than that in the latter at 1500 LST. The increase in surface temperature due to urbanization in the GSA (especially, the southern parts of Seoul) was led to the strong convergence of air masses, causing the early sea breeze and its rapid propagation to inland locations. In addition, the vertical mixing motion in the extended urban areas for the LU-EGIS case was predicted to be stronger than that for the LU-USGS case and vice versa for the original urban areas.