• 한국식물병리학회:학술대회논문집
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• 한국식물병리학회 2005년도 한국식물병리학회 임시총회 및 춘계학술발표회
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• pp.68.1-68.1
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• 2005

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2000년도 춘계학술발표논문집
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• pp.71-71
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• 2000

Recycled fibers usually give slow drainage in the paper forming zone on papermachine, which limit the application of more refining to the fibers for improving paper strength and formation. To use recycled fibers, especially, OCC, more effectively, developing very efficient handling technique of short fibers and fines is inevitable. We tried to make hard flocs of fractionated short fibers and fines, which were the main cause of slow drainage, by adding excessive amount of retention aid on them. This technique was proved to increase drainage with no difference in strength properties, compared to the conventional technique of adding the same amount of polymers to the whole furnish in the lab test. The bonding capability of short fibers and fines in Korean OCC were very poor to be considered as ´fillers´in paper products. Various chemical treatment on the short fibers and fines of the Korean OCC did not improve their bonding and optical properties. One of the reasons of no improvement in their properties was thought to be their high amount of ashes (over 30% in the fractionated samples).

• Journal of the Korean Wood Science and Technology
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• 제51권5호
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• pp.358-380
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• 2023

The intestinal microbiota plays a crucial role in determining human health, rendering it a major focus of scientific investigation. Rather than eliminating all microbes, promoting the proliferation of beneficial microorganisms within the gut has been recognized as a more effective approach to improving health. Unfavorable conditions potentially alter gut microbial populations, including a reduction in microbial diversity. However, intentionally enhancing the abundance of beneficial gut microbes can restore a state of optimal health. Polysaccharides are widely acknowledged for their potential to improve the gut microbiota. This review emphasizes the findings of recent studies examining the effects of forest product-derived polysaccharides on enhancing the gut microbiota and alleviating inflammation, diabetes symptoms, and obesity. The findings of several studies reviewed in this paper strongly suggest that forest products serve as an excellent dietary source for improving the gut microbiota and potentially offer valuable dietary interventions for chronic health problems, such as inflammation, diabetes, and obesity.

• 펄프종이기술
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• 제30권4호
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• pp.59-68
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• 1998

This study was to investigate the effect of chitosan molecular weight, its charge density, and its surface coating treatment on the antibacterial properties of paper. For this study, E.coil was used for antibacterial experiment. Results obtained were as follows : 1. The antibacterial properties of chitosan was significant on the surface-treated sheet. 2. Antibacterial property surface treatment was appeared to be effective when film was formed on the paper surface. 3. The antibacterial properties of chitosan-treated paper was dependent on the amount and the molecular weight of chitosan used. The lower the molecular weight of the chitosan down to 30,000 the better the antibacterial properties in this experiment. 4. Determination of the degree of chitosan-deacetylation by colloidal titration method was consistent with the more complicated and conventional FT-IR method.

• 한국환경생태학회지
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• 제26권3호
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• pp.463-471
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• 2012

본 연구는 산림기반형 한방치유 관광상품에 대한 수요자 욕구와 선호를 파악하여 향후 보다 표적화되고 차별화된 산림치유 관련 정책 수립과 한방치유 관련 프로그램의 개발을 위한 기초자료 제공을 목적으로 실시되었다. 서울에 거주하는 30대 이상 성인남녀 400명을 조사대상으로 성과 연령별, 거주지역별로 비례할당 표본추출법을 사용, 인터넷조사(CAWI)를 실시하여 총 317부가 최종 분석에 이용되었다. 산림기반형 한방치유 관광상품에 대한 이미지는 '산림욕, 숲속 걷기, 나무'가 다수(61.5%)를 차지했고, 선호 의견과 이용 의향은 각각 72.9%와 67.5%로 긍정적인 경향이 높았다. 단지 조성에 적합한 지역으로는 수도권이 53.6%, 강원도가 38.8%로 나타났다. 이용목적은 '스트레스 해소와 재충전', '산림휴양활동', '건강 유지 및 체력 증진'의 순이었다. 선호 치유요법은 '트래킹, 산책 등 걷기요법'이 가장 많았으며 '피트니스, 기체조 등 운동요법'이 그 뒤를 이었다. 상품선택 시 주요 고려 요인은 '이용 비용의 적정성', '음식과 이용 식자재의 적절성', '의료진 및 직원들의 친절성' 등으로 나타났으나 이용편의성과 의료서비스의 질, 관광활동 관련 요인 등 전 요인에 걸쳐 높은 점수를 기록하여 상품에 대한 수요자의 높은 기대수준을 보여주고 있다. 또한 인구통계학적 세분시장 별로 이용관련 요인들에 대한 선호에 차이점을 보이고 있어 관련 상품의 기획과 운영 시 차별화 되고 세분화된 수요자 욕구를 반영하는 것이 필요할 것으로 보인다. 그러나 본 연구는 상이한 수요자 선호를 파악함에 있어 인구통계학적 세분 시장만을 규명함으로써 가장 기초적인 단계에 머무른 한계점을 지니고 있어 후속연구에서는 다차원적이고 복합적인 수요자 욕구에 대한 보다 정교화된 규명이 요망된다.

• 한국산림과학회지
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• 제96권2호
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• pp.183-188
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• 2007

This study was carried out to examine the perceptions of consumers and forest product manufacturers in South Korea about forest certification and to identify their willingness-to-pay for certified products by personal interviews. Sixteen percent of interviewees knew and heard about forest certification. However, fifty-six percent of interviewees had an intention to participate in forest certification system. The consumers' group can be described in relative terms as the male of 30 age bracket. The average price premium charged to consumers was higher than one paid to manufacturers, and thus manufacturers are willing to include the additional costs for certified products.

• 한국응용과학기술학회지
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• 제35권1호
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• pp.247-253
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• 2018

본 연구에서는 수입되는 바이오매스를 대체하고 증가하는 국내 RPS의무비율을 보다 효과적으로 대응하기 위해 우드펠릿으로 사용가능한 국내 산림바이오매스 부존자원을 파악하기 위하여 선행연구 방법과 매년 추가로 성장하는 임목생장률을 기준으로 미이용 산림바이오매스의 양을 산정하였다. 그 결과, 임목가공 중 발생하는 부산물 중 20%를 우드펠릿 원료로 사용한다고 가정했을 경우 두 가지 추정 방법으로 도출된 평균값을 기준으로 우드펠릿 생산 가능량을 예측 하였다. 그 결과 미이용 부산물은 2016년 199만 톤, 2020년 228만 톤, 2030년 308만 톤이 발생되고 원목가공 과정에서 발생되는 임목부산물(피죽, 톱밥 등) 중 20%가 우드펠릿 원료로 활용될 경우 2016년 258만 톤/년, 2020년 295만 톤/년 2030년 398만 톤/년의 원재료가 추가되어 미이용 부산물과 원목가공 과정 중 발생되는 부산물로 생산 가능한 우드펠릿 양은 2016년에 274만 톤/년, 2020년 314만 톤/년 2030년 423만 톤/년의 우드펠릿이 생산 가능하다는 결과를 도출 하였다.

• 펄프종이기술
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• 제42권3호
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• pp.58-66
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• 2010

The Annals of beeswax applied-Joseon Dynasty have some serious damages such as cracks, brown, red or black spots, and discolorations by chemical and biological degradation, but others without any beeswax application have still been keeping good quality during over several hundred years. It would be convinced that the beeswax applied in the Annals resulted in these deteriorations. Therefore, in order to focus on the aging mechanism and conservation techniques for the beeswax-applied Annals of Joseon Dynasty, the beeswax applying and dewaxing techniques of Hanji were tried by auto bar coater with a hot plate, and by heat-pressure sensitive extracting treatments. The ageing behaviors of beeswaxed Hanji and dewaxed Hanji were investigated by measuring the changes of physical, optical, morphological, and chemical properties, through accelerated ageing treatment in dry oven at $150^{\circ}C$ during 48 hours. Consequently, the ageing actions of beeswaxed Hanji were even faster than that of Hanji. The optimum dewaxed amounts from beeswaxed Hanji was also obtained in pressure of $40\;kg_f$ under heating conditions.

• 펄프종이기술
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• 제32권2호
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• pp.1-7
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• 2000

In the previous experiment, it was found that OCC pre-treatment with Hobart mixer at 20-25％ consistency for 3 hrs or more followed by the application of the equal refining time, caused the increase of tensile strength, burst strength, compressive strength and tear resistance, compared to the no pre-treated. Four completely different fibers, which were Hw-BKP, Sw-BKP, White ledger, and OCC were selected for this experiment to investigate the effect of mechanical pre-treatment process on different fibers. From the experiment, it was found that the mechanical pre-treatment did not decrease fiber length at all, but decreased freeness, com-pared to the no pre-treated, when the same refining time was applied. WRVs of the pre-treated fibers were higher than the no pre-treated at the same freeness level. It was speculated that the mechanical pre-treatment induced only hydrophilic nature of fibers without damaging fiber length by delaminating fiber walls. The fiber surface area and the physical strength differences of handsheets will be discussed in the next publication.

• 한국펄프종이공학회:학술대회논문집
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• 한국펄프종이공학회 2000년도 춘계학술발표논문집
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• pp.69-69
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• 2000

In the previous experiment, it was found that OCC pre-treatment with Hobat mixer at 20-25% consistency for 3 hrs or more followed by the application of the equal refining time, caused the increase of tensile strength, burst strength, compressive strength and tear resistance, compared to the no pre-treated. Four completely different fibers, which were Hw-BKP, Sw-BKP, White ledger, and OCC were selected for this experiment to investigate the effect of mechanical pre-treatment process on different fibers. From the experiment, it was found that the mechanical pre-treatment did not decrease fiber length at all, but decreased freeness, compared to the no pre-treated, when the same refining time was applied WRVs of the pre-treated fibers were higher than the no pre-treated at the same freeness level. It was speculated that the mechanical pre-treatment induced only hydrophilic nature of fibers without damaging fiber length by delaminating fiber walls. The fiber surface area and the physical strength differences of handsheets will be discussed in the next publication.