• Korean Journal of Medicinal Crop Science
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• v.14 no.6
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• pp.317-321
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• 2006

This study was performed to compare effect of anticancer activities on Rhodiola sachalinensis by ultrasonifi-cation process and solvent. Compared the yield to the water extracts (WE), wafer extracts with ultrasonification (WEU) at60, loot and ethyl alcohol extracts (EE), ethyl alcohol extracts with ultrasonification (EEU) at 60 ${\circ}$C from Rhodiola sachalinensis. Experimental studies were progressed through the anticancer activities such as cell cytotoxicity, inhibition activities of cell growth. The cell cytotoxicity using human embryonic kidney cell (HEK293) was showed cytotoxicity of below 26.26%by extracts of Rhodiola sachalinensis in 1.0 mg/ml concentration, The anticancer activities were increased in over 70% by extracts of Rhodiola sachalinensis in A549, AGS, Hep3B and MCF-7 cells. From the results, the extract Rhodiola sachalinensis were showed useful anticancer activities.

• The Journal of the Korea Contents Association
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• v.14 no.5
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• pp.144-155
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• 2014

This study aims to overcome the limitations of prior studies that have failed to take into account the impact of psycho-social factors on the employment of people with disabilities as well as the differences in employment by life stage. This study employs a research model that includes psycho-social factors along with human capital to examine how the determinants of employment differ for the disabled by life stage. The analysis in this study takes the form of logistic regression, using data from the fifth wave of the Korea Welfare Panel Survey. Analysis results show that the employment probability of young people with disabilities is significantly associated with their experience of discrimination, with their chance of employment decreasing when they have more experience of discrimination. Middle-aged people with disabilities are more likely to be employed when they have a lower level of education, a better health condition and a higher level of labor ability. For the disabled elderly, their labor ability is the only factor affecting their possibility of employment; they have a higher chance of getting a job when they have a higher level of labor ability.

• Applied Biological Chemistry
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• v.38 no.1
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• pp.90-94
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• 1995

Post emergence herbicidal activities$(pI_{50})$ of X-substituted phenylvinylsulfone derivatives(S) in-vivo against rice(Oryza sativa L.), Barnyard grass(Echinochloa crus-galli) and Pickerelweed(Monochoria vaginalis Presl) were measured by the pot test under paddy conditions. The (S) showed herbicidal symptom rapidly with lower activity(average $pI_{50}=2.0$) as proherbicide, which was excellent tolerance to rice. The structure activity relationships(SAR) were analyzed using such a physicochemical parameters as hydrophobic$({\pi})$ and molecular orbital(MO) quantity by the multiple regression technique, and discussed with quantum pharmacology. The herbicidal activities were related to the hydrophobic$({\pi})$ effect of X-substituent and orbital(HOMO & LUMO) energy. In case of Pickerelweed, the effect was rationalized by parabolic function of ${\pi}$ constant, where the optimal value of ${\pi}$ was 1.10. An increase in hydrophobicity and negative orbital energy by the electron attracting X-substituent may contribute to the herbicidal activity. Based on results proposed from SAR analysis, the mode of herbicidal action could be assumed.

• Korean journal of applied entomology
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• v.12 no.2
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• pp.57-62
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• 1973

한국의 뽕나무 해충은 210종 이상이 기록되었다. 과거 4반세기 동안 다수의 합성농약이 농림해충 및 위생해충 방제에 큰 공헌을 해 온 것은 주지의 사실이다. 그러나 뽕나무의 해충에 대해서는 농약에 대한 내약력이 가장 약한 누에에 미칠 악영향 때문에 여러 가지 어려운 점이 많아서 외국에서도 잔효성이 짧은 TEPP 또는 DDVP등이 사용되고 있을 정도이다. 한국에서도 뽕나무순혹파리 방제를 위해서 초여름에 BHC 분제의 토양처리가 실천되어 왔으며 근래에는 뽕나무애바구미의 피해가 심해져서 몇 가지 살충제로 방제시험이 백에 의해서 이루어 졌을 뿐이다· 따라서 뽕나무해풍 방제를 위해서는 천적을 이용한 방제가 바람직하다 하겠다. 필자들은 우선 천적으로서의 거미의 분포 실태를 파악하기 위하여 수원시 소재 잠업시험장 뽕밭에서 1971-72년에 조사하였다. (Fig. 1) 조사된 뽕밭의 면적을 27a이었으며 9개의 조사구를 택하고 이것을 생태적 환경에 따라 3군으로 나누어 비교해 보았다. A, B 및 C구는 동쪽 가에 위치하며 가로등과 3개의 잠실의 등불의 영향을 받아 해충의 밀도가 높았으며 E, D 및 H구는 뽕밭의 중앙부이며 뽕나무 오갈병의 피해가 심하여 뽕나무가 작았고 또한 결주도 많았다. F, G 및 I구는 도로를 격하고 뽕밭 또는 초지에 면한 가장자리 이었 다. 이밖에 수시로 근처의 딴 뽕밭에서 채집한 것도 포함하여 4,987마리의 거미를 조사한 바 17과 47속 66종에 이르렀다. 이것을 Abe의 보고와 비교한 때 종수가 월등 많았으며 또한 Kayashima의 보고와는 달리 풀거미속(Agelena)거미가 훨씬 적은 것이 특이하였다. 채집된 거미를 그 생태에 기초하여 4군으로 나누어 천적으로서의 가치를 비교해 보면 다음과 같다. A군 : 대형의 둥근 망을 치는 종류들로서 날으는 곤충을 잡아먹는데 천적으로서 그다지 중요하지는 않다. 106주에서 245마리가 채집되었으며 (Tetragnatha squamata)가 우량종이었다. B군 : 소형의 둥근 망을 가지나 잎사이에 치는 종들로서 비록 몸은 작지만 가장 중요한 천적이다. 꼬마거미과 애접시거미과에 속하는 거미들이며 18종, 2,815마리가 잡혔다 우점종은 (Erigoridium raminicola),(Theridion octomaculata) (Enoplognatha spp.)이었다. C군 : 떠돌이거미로서 소형곤충을 잡아먹어 유력한 천적이다 26종 1,727마리가 잡혔으며 게거미과, 깡총거미과 및 염낭거미과의 거미들이 우점종이었다. D군 : 지상을 걸어다니는 떠돌이거미로서 늑대거미과가 약간 잡혔으나 천적으로서 중요한 것으로는 생각되지 않는다. 앞으로 이들과 해충과의 관계를 조사구명 해야 할 것이다.

• Journal of Pharmaceutical Investigation
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• v.22 no.1
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• pp.41-48
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• 1992

Six common tablet disintegrants (corn starch, Avicel PH102, calcium carboxymethylcellulose, Primojel, Kollidon CL and Ac-Di-Sol) were used at the concentration of 0, 2, 4 and 6% (w/w) in salicylamide tablets made with wet granulation method. Certain physical parameters of the disintegrants (moisture sorption, hydration capacity and bulk density) were determined to evaluate their relative efficiency. The disintegration time and dissolution rate of the tablets were correlated well with the ranks of initial rate of moisture sorption for each disintegrant as follows; Ac-Di-Sol, Kollidon CL, primojel, calcium CMC, corn starch and Avicel PH102. The initial rate of moisture sorption was important for the disintegration capacity as well as hydration capacity. The effect of storage at different temperatures and relative humidity upon the tablets containing various disintegrants was evaluated in terms of tablet hardness and disintegration time. Storage at high temperature reduced the hardness substantially and retarded the disintegration of the all tablets studied. Especially, the hardness of tablets containing Kollidon CL was significantly reduced. Although the tablet hardness was decreased and the disintegration time was increased under a moderate humid condition, both of them were decreased under the severely high humid condition of 80 or 90% RH, which was due to the breakrupture of tablet matrix bonds by the excessive uptake of moisture. Therefore, the stability caused by moisture sorption should be considered, when disintegrants having high moisture sorption such as Kollidon CL, Ac-Di-Sol and Primojel were employed in the tablets containing water-labile or hygroscopic drugs.

• Journal of the Korean Society of Radiology
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• v.2 no.4
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• pp.33-40
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• 2008

Images acquired by a digital X-ray imaging system are inherently degraded due to system degradation process and additive noise sources. The system degradation in image quality is typically described as the system response function characterized by the modulation transfer function (MTF) and the noise term described as the noise power spectrum (NPS). In this case, we can restore the blur image as close as possible to the original image by using modified filtering designed for digital imaging system, as we know more precisely about the MTF and the NPS. In this paper, by performing simulation, we tried to restore blurred images taken from a digital X-ray imaging system based upon conventional filtering techniques such as a direct-inverse filtering, limited-inverse filtering, or a Wiener filtering, and evaluated the characteristics of the image restoration.

• Membrane Journal
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• v.16 no.3
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• pp.204-212
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• 2006

A numerical analysis was carried out for separation of carbon dioxide from carbon dioxide/nitrogen gas mixture by a polyethersulfone hollow fiber membrane which has shown a good stability against plasticization by carbon dioxide and an excellent separation efficiency fur carbon dioxide from its gas mixture. A computer program for carbon dioxide separation was developed using the Compaq Visual Fortran 6.6 software. Governing module equations were thought to be an initial-value problem and the nonlinear ordinary differential equations were simultaneously solved using the Runge-Kutta-Verner fifth-order method. From results of numerical analysis, the carbon dioxide partial pressure of the feed stream, the pressure ratio of the feed side to the permeate side and the feed gas residence time at the inside of a membrane were found to be very important factors to affect the permeation characteristics of carbon dioxide.

• Membrane Journal
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• v.8 no.4
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• pp.228-234
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• 1998

Among various water contaminents, organic compounds like phenol are difficult to be removed or destroyed by conventional methods under the unusual discharge conditions. The separation of phenol from aqueous solution has been carried out by several methods recently: absorption by an activated carbon, solvent extraction and liquid membrane technology. The liquid membrane based on water-oil emulsification has been tested as an alternative technology of the conventional technology. In this work, tri-n-butyl phosphate(TBP) and liquid polymers were examined as a liquid membrane in the supported liquid membrane(SLM). The feed concentration of phenol was varied and various types of liquid membranes were used to examine their effects on separation of phenol. It was found that TBP, polypropylene glycol 4000(PPG 4000) and polybutytene glycol 500(PBG 500) were proper carriers because mass transfer rates through them were much higher than or similar to that through methyl isobutyl ketone(MIBK) which was used as a conventional solvent in a solvent extraction process.

• Korean Journal of Medicinal Crop Science
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• v.14 no.1
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• pp.45-48
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• 2006

Alcohol dehydrogenase (ADH) and Aldehyde dehydroganase (ALDH) activities of turnip extracts with ultrasonification at $60,\;100^{\circ}C$ temperature were investigated. Ultrasonification extracts showed a increase as compared with the normal extracts. ALDH activities were high than ADH activities. So, turnip extracts was shown efficient plants in alcohol oxidation. Appraisers liked powder extracts better than liquid extracts in sensory score.

• Membrane Journal
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• v.16 no.4
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• pp.252-258
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• 2006

A numerical analysis was performed for a separation process of carbon dioxide from a flue gas stream using polyethersulfone hollow fiber membranes. Countercurrent flow governing equations were regarded to be two point boundary-value problem and the nonlinear ordinary differential equation were simultaneously solved using the finite- difference method. A computer program was developed using the Compaq Visual Fortran 6.6 software. The carbon dioxide permeate driving force and the fred gas residence time at the inside of membrane were found to be very important factors affecting the permeation characteristics of carbon dioxide. The carbon dioxide concentration in the permeate and the flow rate of the permeate were found to be slightly larger by a few percent with a countercurrent flow analysis than those with a cocurrent flow analysis.