• KSBB Journal
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• v.24 no.4
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• pp.361-366
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• 2009

Response surface methodology (RSM) was used for optimization the fraction conditions of xylose from pepper stem with dilute sulfuric acid. The independent variables were acid concentration in the range of 1.134 to 2.866%, reaction temperatures in the range of 142.68 to $177.32^{\circ}C$, and hydrolysis time in the range of 6.34 to 23.66 min. were studied. The dependent variables were xylose yield from pepper stem, and the production of by-products, for example, furfural, acetic aicd, HMF etc. Experimental results had a good match with statistical result. The maximum xylose yield obtained in this experiment was 71% concentration.

• 베이커리
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• no.2 s.403
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• pp.128-129
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• 2002

• The Korean Publising Journal, Monthly
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• s.185
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• pp.16-16
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• 1996

• Journal of Life Science
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• v.19 no.9
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• pp.1333-1336
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• 2009

The purpose of this study was to characterize the aromas of rose tea and rosehip tea. Aroma compounds were extracted by simultaneous distillation and extraction method using a Likens and Nickerson's extraction apparatus. The concentrated aroma extracts were analyzed and identified by GC and GC-MS. Thirty-eight compounds, including phenylethyl alcohol, citronellol, menthol, menthone, linalool and geraniol, were isolated and identified in rose tea. Thirty-six compounds, including menthol, $\alpha$-anethole, $\alpha$-terpinolene, menthone, linalool and 6-methyl-5-heptene-2-one, were isolated and identified in rosehip tea. Large amounts of phenyl ethyl alcohol and citronellol were found in rose tea, while large amounts of menthol and $\alpha$-anethole were found in rosehip tea.

• 베이커리
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• no.12 s.377
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• pp.150-155
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• 1999

• Journal of the Korean Society of Clothing and Textiles
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• v.27 no.2
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• pp.200-208
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• 2003

The purpose of this study is to propose scientific data and to develop complex\ulcornermultifunctional fibers by applying microcapsules containing rosewood oil on wool fabric. Polyurea was used as wall material of microcapsules. The parameters for adoptable condition are 20min of agitation time, 5000rpm of agitation speed, 4% of emulsifier concentration according to the observation with SEM and particle analyzer. The melting peak of microcapsules was shown to be 280$^{\circ}C$ The amount of released rosewood from microcapsules at 25$^{\circ}C$ was below 1 % and at 40% was below 3%. Therefore, polyurea microcapsules is capable of preserving rosewood oil for long self-life at normal temperature. Antimicrobial activity to dry cleaning and ironing cycle of wool fabric treated with microcapsules were maintained.

• Clean Technology
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• v.17 no.1
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• pp.31-36
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• 2011

All types of ${\gamma}-Al_2O_3$ such as acidic, neutral and basic forms were chemically modified with (3-mercaptopropyl) trimethoxysilane (3-MPTMS) and oxidized by 30 wt% $H_2O_2$ solution. As a result, sulfonic acid modified ${\gamma}-Al_2O_3$ catalysts were obtained. Their formation was achieved more easily by treating 1M HCl solution. Their catalytic performance was tested by dehydration reaction of D-xylose to furfural. The sulfonic acid modified ${\gamma}-Al_2O_3$ catalysts showed high conversion (>90%) of D-xylose, and the selectivity to furfural was increased with the amount of sulfonic acid anchored on the catalyst.

• Journal of the Korean Society of Radiology
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• v.84 no.5
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• pp.1110-1122
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• 2023

Purpose This study aimed to assess the variability of transrectal shear wave elastography (SWE) using a designed phantom. Materials and Methods In a phantom, the SWE values were examined by two radiologists using agarose and emulsion silicone of different sizes (1, 2, and 3 cm) and shapes (round, cubic) at three depths (1, 2, and 3 cm), two region of interest (ROI) and locations (central, peripheral) using two ultrasound machines (A, B from different vendors). Variability was evaluated using the coefficient of variation (CV). Results The CVs decreased with increasing phantom size. Significant changes in SWE values included; agarose phantom at 3 cm depth (p < 0.001; machine A), 1 cm depth (p = 0.01; machine B), emulsion silicone at 2 cm depth (p = 0.047, p = 0.020; both machines). The CVs increased with increasing depth. Significant changes in SWE values included; 1 cm agarose (p = 0.037, p = 0.021; both machines) and 2 cm agarose phantom (p = 0.047; machine A). Significant differences in SWE values were observed between the shapes for emulsion silicone phantom (p = 0.032; machines A) and between ROI locations on machine B (p ≤ 0.001). The SWE values differed significantly between the two machines (p < 0.05). The intra-/inter-operator agreements were excellent (intraclass correlation coefficient > 0.9). Conclusion The phantom size, depth, and different machines affected the variability of transrectal SWE.

• Aerospace Industry
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• v.85
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• pp.34-37
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• 2004

우리나라의 하늘을 날아다니는 항공기 중 354대나 롤스로이스 엔진을 장착한다는 사실을 알고 있는 이는 드물것이다. 이처럼 묵묵히 육상, 항공, 해상의 동력시스템 개발에 100년의 정열을 이어오는 곳이 바로 롤스로이스다. 최고의 제품을 만든다. 오로지 제품은 ''''엔진'''' 하나, 이것은 100년 동안 변하지 않고 이어온 롤스로이스(CEO : 존 로즈)의 신념이다.

• Nuclear industry
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• v.37 no.7
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• pp.17-18
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• 2017

미국의 환경 운동 기구인 "Environmental Progress"의 마이클 쉘렌버거 대표는 7월 5일 미국의 환경운동가, 역사학자, 기후학자 등 34명 공동 명의의 서한을 홈페이지(http://www.environmentalprogress.org/southkorea-letter)에 공개했다. 수신은 문재인 대통령으로 되어 있다. 쉘렌버거 대표는 미국의 이 2008년 '환경의 영웅(Hero of the Environment)'으로 선정한 환경운동가이다.. 퓰리처상 수상 경력이 있는 역사학자 리처드로즈, 기후학자 제임스 핸슨, 리처드 뮬러 UC버클리 교수 등도 서한에 이름을 올렸다.