• 대한소아치과학회지
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• 제42권3호
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• pp.226-232
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• 2015

소아 청소년치과에서 장애아동 및 청소년을 안전하고 효율적으로 치료하기 위해서는 여러 사람의 다양한 협조가 필요하다. 이 연구는 장애아동의 치과치료 시 자주 이용되는 의식하진정치료의 진료용 표준지침을 시범적으로 개발, 적용하고, 진료과정에 참여한 사람들의 만족도를 평가하기 위해 시행되었다. 의무기록 분석을 통하여 표준진료지침을 개발하고 치료과정에 적용한 후 환자, 보호자, 의료진 및 스탭의 만족도를 설문을 통하여 평가한 결과, 표준진료지침의 적용은 환자, 보호자 및 의료진과 보조자가 전반적으로 만족한 것으로 나타나 임상적 유용성이 높을 가능성을 암시하였다. 결론적으로 표준진료지침의 개발과 적용은 임상진료과정의 표준화를 통하여 진료에 대한 예측가능성을 높이고, 환자 안전에 대한 불안을 감소시켜 환자와 의료진의 만족도 향상과 진료의 질적 향상을 기대 할 수 있을 것이다.

• Journal of Gastric Cancer
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• 제9권1호
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• pp.18-25
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• 2009

목적: 위암 수술 후 회복을 위한 입원기간은 지금까지 대개 1주일 이상이었다. 이러한 회복기간을 요구하는 가장 큰 이유는 수술 후 3~4일간의 금식기간의 필요성과 합병증 발생 여부에 대한 관찰 때문이다. 본 연구진은 이번 연구를 통하여 수술 후 환자를 빠른 시일 내에 일상으로 복귀시키기 위한 임상진료 지침서를 만들고 이를 환자들에게 적용하여, 그 유용성과 안정성을 평가 하고자 하였다. 대상 및 방법: 2007년 10월부터 2008년 6월까지 성모병원에서 연속적으로 수술을 받은 103명의 환자를 수술 후 조기회복을 위한 임상진료 지침서의 적용대상으로 하였다. 임상진료 지침서에는 수술 전 최소한의 시술, 수술 후 적절한 통증관리 및 수액공급, 수술 후 조기 보행과 조기경구영양공급 등을 포함하고 있다. 진료지침 제외 기준을 수술 전, 수술 중 그리고 수술 후에 따라 마련하였다. 결과: 103명의 환자들 중 모두 19명의 환자가 각각 수술 전 5명, 수술 중 7명 그리고 수술 직후 7명의 제외 기준에 따라 제외되었다. 제외되지 않은 84명(81.6%)에 대하여 진료지침 시행 초기엔 수술 8일 후 퇴원을 계획하였으며, 최근엔 6일 후 퇴원을 계획하고 있다. 이들 중 22명(26.2%)의 환자에서 수술 후 합병증이 발생하였으며, 위장관 관련 합병증은 6명, 감염 관련 합병증은 8명에서 발생하였다. 환자들의 임상적, 수술적 특징에 따라서 합병증 발생률의 차이를 나타내지 않았다. 결론: 위암 수술 후 조기회복을 위한 임상진료 지침서는 제외 기준을 적용 후 대상 환자를 선정하고 활용한 결과, 환자들에게 유용하고 안전하게 사용되었다.

• Journal of Biosystems Engineering
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• 제38권3호
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• pp.199-207
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• 2013

Purpose: Tomatoes, an important agricultural product in fresh-cut markets, are sometimes a source of foodborne illness, mainly Salmonella spp. Growth cracks on tomatoes can be a pathway for bacteria, so its detection prior to consumption is important for public health. In this study, multispectral Visible/Near-Infrared (NIR) reflectance imaging techniques were used to determine optimal wavebands for the classification of defect tomatoes. Methods: Hyperspectral reflectance images were collected from samples of naturally cracked tomatoes. To classify the resulting images, the selected wavelength bands were subjected to two-band permutations, and a supervised classification method was used. Results: The results showed that two optimal wavelengths, 713.8 nm and 718.6 nm, could be used to identify cracked spots on tomato surfaces with a correct classification rate of 91.1%. The result indicates that multispectral reflectance imaging with optimized wavebands from hyperspectral images is an effective technique for the classification of defective tomatoes. Conclusions: Although it can be susceptible to specular interference, the multispectral reflectance imaging is an appropriate method for commercial applications because it is faster and much less expensive than Near-Infrared or fluorescence imaging techniques.

• Journal of Microbiology and Biotechnology
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• 제28권6호
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• pp.909-916
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• 2018

Previously, a cytosolic trehalase (TreH) from the hyperthermophilic archaeon Sulfolobus acidocaldarius was reported; however, the gene responsible for the trehalase activity was not identified. Two genes, saci_1816 and saci_1250, that encode the glycoside hydrolase family 15 type glucoamylase-like proteins in S. acidocaldarius were targeted and expressed in Escherichia coli, and their abilities to hydrolyze trehalose were examined. Recombinant Saci_1816 hydrolyzed trehalose exclusively without any help from a cofactor. The mass spectrometric analysis of partially purified native TreH also confirmed that Saci_1816 was involved in proteins exhibiting trehalase activity. Optimal trehalose hydrolysis activity of the recombinant Saci_1816 was observed at pH 4.0 and $60^{\circ}C$. The pH dependence of the recombinant enzyme was similar to that of the native enzyme, but its optimal temperature was $20-25^{\circ}C$ lower, and its thermostability was also slightly reduced. From the biochemical and structural results, Saci_1816 was identified as a trehalase responsible for trehalose degradation in S. acidocaldarius. Identification of the treH gene confirms that the degradation of trehalose in Sulfolobus species occurs via the TreH pathway.

• 동력기계공학회지
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• 제18권6호
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• pp.133-139
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• 2014

In this research, the photocatalytic degradation of benzothiophene in $TiO_2$ aqueous suspension has been studied. $TiO_2$ photocatalysts are prepared by a sol-gel method. The dominant anatase-structure on $TiO_2$ particles is observed after calcining the $TiO_2$ gel at $500^{\circ}C$ for 1hr. Photocatalysts with various transition metals (Nd, Pd and Pt) loading are tested to evaluate the effect of transition metal impurities on photodegradation. The photocatalytic degradation in most cases follows first-order kinetics. The maximum photodegradation efficiency is obtained with $TiO_2$ dosage of 0.4g/L. The photodegradation efficiency with Pt-$TiO_2$ is higher than pure $TiO_2$ powder. The optimal content value of Pt is 0.5wt.%. Also we investigate the applicability of $H_2O_2$ to increase the efficiency of the $TiO_2$ photocatalytic degradation of benzothiophene. The optimal concentration of $H_2O_2$ is 0.05. The effect of pH is investigated; we obtain the maximum photodegradation efficiency at pH 9. Hydroxy-benzothiophenes and dihydroxy-benzothiophenes are identified as reaction intermediates. It is proposed that benzothiophene is oxidized by OH radical to sequentially form hydroxyl-benzothiophenes, dihydroxybenzothiophenes, and benzothiophenedione.

• Journal of Microbiology and Biotechnology
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• 제1권3호
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• pp.157-162
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• 1991

Conditions for glutathione production in E. coli cells which possess pGH501 (2 gshI+gshII) were studied. In terms of ATP supply for the glutathione synthesis, two different systems have been constructed and compared. When the acetate kinase reaction of E. coli was used for ATP generation, 20 mM of L-cysteine was completely converted to glutathione by toluene-treated E. coli cells (100 mg/ml) harboring pGH501 within 2 h at $37^{\circ}C$. However, considering the economical aspects, the glycolytic pathway of yeast was chosen as a better system for ATP generation. The optimal concentrations of reactants for glutathione production were determined to be as follows; 80 mM L-glutamate, 20 mM L-cysteine, 20 mM glycine, 20 mM $MgCl_2$, 50 mM potassium phosphate buffer (pH 7.5), 400 mM glucose, polyoxyethylene stearylamine ($5\;\mul/ml$), toluene-treated E. coli HB101/pGH501 (100 mg/ml), and dried yeast cells (400 mg/ml). The conversion ratio of L-cysteine to glutathione was 80% (about 5 mg/ml) under optimal condition within 6 h at $37^{\circ}C$.

• 대한기계학회논문집
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• 제19권4호
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• pp.887-895
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• 1995

Considering that the laser range finder has the excellent resolution with respect to angular and distance measurements, a sophisticated local path planning algorithm is achieved by subgoal and sub-subgoal searching methods. The subgoal searching finds the passable ways between obstacles and selects the optimal pathway in order to reduce the moving distanced from start point to given to given goal. On the other hand, the sub-subgoal searching corrects the path given in subgoal searching in the case of which the mobile robot will collide with obstacles. Also, the effectiveness of the established local path planning and local minimum avoiding algorithm are estimated by computer simulation and experimentation in complex environment.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2003년도 생물공학의 동향(XII)
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• pp.218-221
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• 2003

Lactic acid fermentation from sucrose as a carbon source was experimented. E. faecalis RKY1 metabolized sucrose efficiently into lactic acid through homolactic fermentation pathway. The optimal sucrose concentration for lactic acid production was found to be 150 g/l with the yield and productivity of 0.97 g/g and $3.7\;g/l\;{\cdot}\;h$, respectively. Lactic acid produced from sucrose was almost L(+)-lactic acid up to 98% based on total lactic acid produced. Therefore, sucrose was thought to be potential carbon source for L(+)-lactic acid production using E. faecalis RKY1.

• 상하수도학회지
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• 제26권6호
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• pp.779-786
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• 2012

The degradation of 2-chlorophenol(2-CP) by various AOPs(Advanced Oxidation Processes) including the photo-Fenton process has been examined. In sole $Fe^{2+}$, UV or $H_2O_2$ process without combination, low removal efficiencies have been achieved. But the photo-Fenton process showed higher removal efficiency for degradation of 2-chlorophenol than those of other AOPs including the Fenton process and the UV processes. In the photo-Fenton process, the optimal experimental conditions of 2-chlorophenol degradation were obtained at pH 3 and the $Fe^{2+}/H_2O_2$molar ratio of 1. Also the 2-chlorophenol removal efficiency increased with decreasing of the initial 2-chlorophenol concentration. 3-chlorocatechol and chlorohydroquinone were identified as photo-Fenton reaction intermediates, and a degradation pathway of 2-chlorophenol in the aqueous phase during the photo-Fenton reaction was proposed.

• 생약학회지
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• 제27권4호
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• pp.301-308
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• 1996

Hairy roots induced from stems of Rubia cordifolia var. pratensis were cultured in the liquid medium under a variety of auxins to find the optimal condition for the growth and production of pigments. Culture of the hairy roots on NN liquid medium containing NAA 0.5 mg/l was best for growth of hairy roots. Production of yellow anthraquinone derivatives and purpurin in hairy roots was enhanced by the culture on NN liquid medium without auxins. Effects of L-phenylalanine, L-tyrosine and juglone, synthesized via the shikimic acid pathway, on growth and production of pigments in hairy roots were studied in the present study. Concentration of exogeneous L-phenylalanine. L-tyrosine and juglone in liquid culture system of hairy root containing NAA 0.1 mg/l was decreased quickly in its early stages of the culture period. Addition of juglone to NN liquid medium containing NAA 0.1 mg/l enhanced the productivity of pigments in hairy roots.