• Journal of Forest and Environmental Science
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• 제34권6호
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• pp.490-496
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• 2018

The present study aimed to identify the importance of forest experience activity by examining what effects forest experience activity has on primary school students. The study population consisted of 108 students enrolled as fourth graders in primary schools in Chuncheon as of November 2017. The study measured the changes in their attitude toward forest and personality from before and after forest experience activity. The results indicated that the primary school students who participated in forest experience activity showed statistically significant increase in attitude toward forest and personality. In other words, the study identified the positive effects of forest experience activity on recognizing the importance of nature and personality building. The present study aimed to test the importance and effects of forest experience through forest experience activity outside of the classroom, as well as to present the validity of promoting forest experience activity.

• Journal of the Korean Wood Science and Technology
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• 제33권5호통권133호
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• pp.86-91
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• 2005

Six compounds were isolated from the EtOAc and $Et_2O$ fractions of the bark of Rhus chinensis by repeated column chromatography with $SiO_2$ and Sephadex LH-20. The structures were determined by instrumental analysis using MS and NMR spectrophotometer as: gallic acid (1), methyl gallate (2), 6, 7-dimethoxycoumarin (3), orcinol-${\beta}$-D-glucoside (4), scopoletin (5), semialactone (6). Among these compounds, 6,7-dimethoxycoumarin (3) was isolated from this plant for the first time. To measure the antioxidant activity, the DPPH radical scavenging activity test was performed. Gallic acid (1) showed the strongest activity, while orcinol-${\beta}$-D-glucoside (4), semialactone (5) and scopoletin (6) had the low activities.

• Journal of the Korean Wood Science and Technology
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• 제34권2호
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• pp.95-100
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• 2006

This study is to isolate bio-active compounds from Alnus firma and evaluate their antioxidant activity. Dried wood powder of A. firma was extracted by organic solvents and fractionated in the sequential extraction steps. The isolated compounds were characterized by EI-MS, $^{13}C-$ and $^1H-NMR$ including COSY, DEFT, HMQC, and HMBC. Antioxidant activities of the isolated compounds were evaluated by DPPH (1,1-diphenyl-2-picrylhydrazyl) free radical scavenging effect. From the wood of A. firma, three kinds of diarylheptanoids, alnusodiol (1), alnusonol (2) and alnusone (3), and gallic acid (4) were isolated. Among these four compounds, compound 1, 2, and 3 are isolated from A. firma for the first time. The antioxidant activity of gallic acid was 93.5% at the concentration of 100 ppm. This compound showed stronger antioxidant activity than those of other isolated compounds and the reference BHT (butylated hydroxytoluene).

• 한국환경교육학회지:환경교육
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• 제18권2호
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• pp.90-100
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• 2005

This study was intended to investigate effects of building school forests on elementary school students, including changes in mental image of school, attitude toward nature and forest, and awareness of their relationship with school forest. The total number of 770 drawings and 1,124 writings were collected to be analyzed from three elementary schools. The results showed that there were significant differences between two student groups, respectively forest school group versus non-forest school group, in their mental image of school. For instance, more often observed in the drawings of forest school group students than their counterparts were natural and human elements, activities associated with nature, and natural or human elements located at central area. Also, more frequently found in the writings of forest school group students than their counterparts were letter-style sentences, stories about school forests, inherent values on nature and forest, and curiosity regarding the nature. These results seem to indicate that in order to materialize educational value of school forests, practical workshops for teachers need to be held as soon as possible and new activity models for students should be developed. In addition to that, long-term research on effectiveness of school forest have to be conducted to a number of schools.

• Journal of the Korean Wood Science and Technology
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• 제32권6호
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• pp.43-49
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• 2004

Three flavonoids, quercetin, taxifolin, and kaempferol were isolated from the woods of Liriodendron tulipifera. Their structures were determined by spectral analysis. Based on 1, l-diphenyl-2-picrylhydrazyl (DPPH) radical scavenging activity method, the antioxidative activities of three isolated compounds and their acetates were measured in order to search for natural antioxidants. The IC₅₀ of quercetin (1), taxifolin (2), and kaempferol (3) were 3.6, 3.9, and 4.1 ㎍/㎖, respectively.

• 농업과학연구
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• 제51권1호
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• pp.9-23
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• 2024

This study investigates the physiological and psychological effects of a nature-based outdoor activity program in an environment reflecting the characteristics of forest and coastal areas on 30 firefighters (average age: 40.4 ± 9.8 years) who are frequently exposed to dangerous situations. Blood pressure, pulse pressure, and heart rate variability were used as physiological measurement indicators, and the Korean versions of PANAS (positive affect and negative affect schedule), WEMWBS (Warwick-Edinburgh mental well-being scale), and PRS (perceived restorativeness scale) were used as psychological measurement indicators. For four days and three nights, the participants experienced programs at Hallyeohaesang Nature Center and the surrounding mountains, seas, and islands, utilizing forest resources such as trekking on forest trails, walking barefoot, taking aromatic footbaths, meditating in forest oxygen domes, and lying on relaxation chairs, and programs utilizing marine resources such as taking a boat to an island, walking on forest trails with seascape views, and sailing on a yacht. Participants' systolic blood pressure and pulse pressure decreased, and participants' positive emotions increased and negative emotions decreased after the program. There was a statistically significant increase in mental well-being and perceived restorative environment. Through this study, it was found that nature-based outdoor activity programs based on forest and marine resources are effective in physiological and psychological stability of firefighters. It is hoped that the results of this study will be applied to other high-risk workers for PTSD, who have high stress levels, by combining forest healing and marine healing, and expanding the scope and diversity of programs in more diverse environments and conditions.

• 한국환경생태학회지
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• 제30권5호
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• pp.908-914
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• 2016

우리나라 유아교육현장에서 자연친화 교육에 대한 관심이 높아지고 자연체험 프로그램에 대한 요구가 증가하고 있다. 본 연구에서는 숲이 가지고 있는 산림치유인자들과 요인들을 활용하는 숲에서의 오감체험활동이 유아의 자아효능감과 생명존중인식에 미치는 영향을 알아보고자 하였다. 실험대상은 청주시 OO동에 위치한 유아교육기관의 숲특별반을 주2회 참여하는 실험군과 통제군은 숲활동을 하지 않고 유아교육기관에서 운영하는 프로그램에 참여하는 만 5세 유아 남녀 각각 20명으로 하였으며 남자아이는 11명, 여자아이는 9명씩이었다. 실험기간은 2016년 8월08일부터 2016년 9월20일까지 매주 2회씩 12회기로 1시간 (60분)씩 실시하였다. 오감체험활동은 숲에서 유아들이 오감을 깨우고, 오감을 통해 계절의 변화를 알고, 자신의 자아를 확립하고 자연과 친해지는 활동이다. 프로그램 실시 전후에 유아를 대상으로 한 자아효능감 검사와 생명존중인식검사를 실시하고 그 자료는 SPSS 18.0 로 분석하였다. 그 결과 긍정적인 생각과 자신감을 나타내는 자아효능감, 자연과 함께 더불어 살아가며 생명을 존중하는 생명존중인식이 통계적으로 유의미하게 향상되었다(p<0.05). 오감체험활동을 통해 유아들은 온몸으로 자유롭게 자연을 마음껏 느낄 수 있었고, 교실에서 이루어지는 활동에 비해 자아효능감이나 생명존중인식에 긍정적인 영향을 주는 것으로 나타났다.

• 한국농림기상학회:학술대회논문집
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• 한국농림기상학회 2005년도 추계 학술발표논문집
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• pp.68-70
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• 2005

• 한국응용곤충학회:학술대회논문집
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• 한국응용곤충학회 2000년도 합동 춘계 학술발표회
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• pp.74-74
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• 2000

• Journal of Ecology and Environment
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• 제38권4호
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• pp.443-450
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• 2015

The east coast of the Korean Peninsula is susceptible to fires because of the low rainfall in winter and spring, and large forest fires have occurred in this area. Lack of fresh water to combat fires has hampered efforts to prevent widespread forest fires in this region. Seawater has not been used as a suppressant because of possible detrimental effects of salt. We investigated the mobility of saline water in the forest soil and their effect on the microbial activity. Using a fire-fighting helicopter, seawater was sprayed over three plots (50 × 100 m) located on the eastern slope of the Baekdu mountain range in South Korea in April, 2011. We sampled the soil in April 4, May 20, and August 5 to determine the amount of salt that remained in the soil. The electrical conductivity value of the soil decreased to <400 μS/cm over a 1-month period. Approximately, four months after the application of seawater, the electrical conductivity value and Na⁺ content in all treatment plots did not significantly differ to those of the control plot, and total microbial activity also recovered to that of the control. Our results indicate that the amount of rainfall, soil physical-chemical properties, and topological factors may be a critical factor determining the mobility of saline water in forest soil.