• KSBB Journal
• /
• v.4 no.3
• /
• pp.276-280
• /
• 1989

The effect of the pretreatment by solvent extraction on the saccharification of poplar (Populus euramencana) was studied. The solvent system was Phenol/H2O(Uncatalyzed)and Phenol/H2O/HCl catalyst system. When the poplar was pretreated by uncatalyzed system, the best result of the saccharification was total of 43.9 g/1 reducing sugar produced and 83.5% of carbohydrated conversion was obtained at 19$0^{\circ}C$, 60 minutes. Total wood yield and the lignin removal were 46.3% and 98.2% respectively. The use of acid catalyst was unsuitable to increase he efficiency of saccharification.

• Journal of the Korean Wood Science and Technology
• /
• v.37 no.3
• /
• pp.255-264
• /
• 2009

To evaluate the effects of chemical pretreatments of lignocellulosic biomass on enzymatic hydrolysis process, Populus euramericana was pretreated for 1 hr with 1% sulfuric acid ($H_2SO_4$) at $150^{\circ}C$ and 1% sodium hydroxide (NaOH) at $160^{\circ}C$, respectively. Before the enzymatic hydrolysis, each pretreated sample was subjected to drying process and thus finally divided into four subgroups; dried or non-dried acid pretreated samples and dried or non-dried alkali pretreated samples and chemical and physical properties of them were analyzed. Biomass degradation by acid pretreatment was determined to 6% higher compared to alkali pretreatment. By the action of acid ca. 24.5% of biomass was dissolved into solution, while alkali degraded ca. 18.6% of biomass. However, reverse results were observed in delignification rates, in which alkali pretreatment released 2% more lignin fragment from biomass to the solution than acid pretreatment. Unexpectedly, samples after both pretreatments were determined to somewhat higher crystallinity than untreated samples. This result may be explained by selective disrupture of amorphous region in cellulose during pretreatments, thus the cellulose crystallinity seems to be accumulated in the pretreated samples. SEM images revealed that pretreated samples showed relative rough and partly cracked surfaces due to the decomposition of components, but the image of acid pretreated samples which were dried was similar to that of the control. In pore size distribution, dried acid pretreated samples were similar to the control, while that in alkali pretreated samples was gradually increased as pore diameter increased. The pore volume which increased by acid pretreatment rapidly decreased by drying process. Alkali pretreatment was much more effective on enzymatic digestibility than acid pretreatment. The sample after alkali pretreatment was enzymatically hydrolyzed up to 45.8%, while only 26.9% of acid pretreated sample was digested at the same condition. The high digestibility of the sample was also influenced to the yields of monomeric sugars during enzymatic hydrolysis. In addition, drying process of pretreated samples affected detrimentally not only to digestibility but also to the yields of monomeric sugars.

• The Research Journal of the Costume Culture
• /
• v.11 no.5
• /
• pp.619-646
• /
• 2003

The purpose of this study is to explore and compare the regional characteristics of textile industries and corresponding education systems in Korea and Italy. The Italian textile industry is well known for its continuous development of high quality textile fabrics and aesthetic fashion design. One of contributing factors for the success of Italian textile industry is its regional specialization of the industry and corresponding education systems. In particular, the regional education systems in Italy are designed to educate and supply labors necessary to the development of the regional textile industries. According to the study, this characteristic is well shown in their curriculum which emphasizes the practicality and corporation with the industry. In contrast, the Korean education system for the textile industry ignores the regional specialization and its curriculum is designed, in large part, to produce textile designers. This causes difficulties in meeting the various demands from the industry such as the textile planning, textile production, and textile marketing and sales. To solve the problems, we must encourage the industrial-educational corporation to promote the practicality of the textile education system and make diversification and specialization of the curriculum of textile education to cultivate men of talent, such as merchandisers, fashion coordinators, converters, stylists, and displayer, necessary to the development of the Korean textile industry.

• Journal of the Korean Wood Science and Technology
• /
• v.32 no.4
• /
• pp.66-73
• /
• 2004

Three species of Italian poplar (Populus euramericana), red pine (Pinus densiflora) and oriental oak (Quercus variabilis) were selected for this study. They were cut so that the distances between each of tips and roots for a pair of fingers were 0, 0.15, 0.30 and 0.45 mm. Poly vinyl acetate (PVAc) and resorcinol-phenol resin (RPR) were used for finger-jointing. Compressive test parallel to the grain was conducted for the finger-jointed specimens. The results were as follows: The efficiency of compressive Young's modulus of finger-jointed timber to solid wood indicated low values, whereas the efficiency of compressive strength indicated high values of more than 90% in all species, especially, it was found that those of red pine indicated markedly high values of more than 97%. The efficiency of compressive displacement of Italian poplar finger-jointed timber was 2 times higher than solid wood, and it was 1.2 and 1.3 times higher than solid woods in red pine and oriental oak, respectively. Also, it was found that 0, the distance between each tip and root for the fingers, indicated the highest efficiency of compressive strength performance in Italian poplar finger-jointed timber, and for red pine and oriental oak finger-jointed timbers, the distances of 0.15 and 0.30 were found to indicate the highest efficiency.

• Culinary science and hospitality research
• /
• v.4
• /
• pp.437-453
• /
• 1998

As hotel industry is growing more and more with increasing income and free time, departments of Rooms and Food & Beverage(F&B) in hotels are getting more important. Especially F & B department in hotel has been playing an important role in marking 39.9% of total revenue. It is certain that F & B will be more crucial. The printed menu is an extremely important marketing tool in order to increase profits. A well-designed and well-produced menu can afford to promote efficiencies in the kitchen, to get practical service system, to save the time and to provide customers with good food. A well-designed menu can also draw to reduce expenditure on wage and food stuff.

• Electrical & Electronic Materials
• /
• v.27 no.4
• /
• pp.14-22
• /
• 2014

• Proceedings of the Korea Air Pollution Research Association Conference
• /
• 2004.11a
• /
• pp.475-476
• /
• 2004

• Proceedings of the Korean Fiber Society Conference
• /
• 2003.04a
• /
• pp.135-138
• /
• 2003

오늘날의 섬유산업은 단순히 입는다는 기능적인 면에서 탈피하여 인간의 미와 감성을 추구하는 매체로써의 역할을 요구하고 있다. 따라서 다양한 직물을 선호하는 소비자들의 욕구를 충족시켜주기 위하여 원사 자체가 점점 다양화 되어가고 있으며, 특히 합성섬유의 발명에 의해서 의류용 소재로 많이 사용되고 있다. 섬유에 감성을 부여하기 위한 방법으로 여러 가지가 있지만 최근 일본, 이태리 등을 중심으로 활발히 시도되고 있는 복합연사기술의 개발에 많은 관심이 집중되고 있다.[7] (중략)

• Proceedings of the Korean Society of Dyers and Finishers Conference
• /
• 2003.04a
• /
• pp.83-86
• /
• 2003

기존의 습식염색법이 에너지 다소비형일 뿐만 아니라 분산염료를 이용해 PET, Nylon과 같은 합성섬유를 염색할 때 첨가되는 조제(계면활성제, 균염제, 유연제 등)가 난분해성 폐수를 유발시킨다. 이를 방지하기 위한 새로운 초임계염색법이 1991년 독일의 Schollmeyer 교수에 의해 보고된 이후, 한국, 미국, 이태리, 프랑스 등에서도 이에 관한 연구가 활발히 진행되어 현재 많은 연구 성과를 거두고 있다. (중략)

• Landscaping Tree
• /
• v.81 no.7_8
• /
• pp.25-28
• /
• 2004

그간 무궁화 보급운동은 무궁화가 가지고 있는 속성과 품종의 선택, 식재방법 및 관리에 대한 기본 개념이 정립되지 않은 상태에서 추진되어온 결과 다소 잘못된 점이 도출 되었을 뿐 아니라 국민들이 좋아할 만큼 성공되지 못하였다. 세계적으로 무궁화를 가로수나 정원수로 심고 있는 나라는 온대지역에 속하는 대부분의 나라로 알려져 있고 특히 그리스나 이태리에서 주택가나 가로수로 식재되고 있다. 그러나 그 가로수는 우리가 일반적으로 생각하고 있는 느티나무, 은행나무, 버드나무등과 같이 크게 자라는 나무가 아니므로 주택가나 꽃길조성에 식재되어 왔다. 이제 무궁화는 어느 곳이든 잘 자라는 수벽이나 꽃동산으로 이용하고 아무데서나 잘 자란다는 「고정관념」을 버려야 한다.