세계적(世界的)으로 양잠지역(養蠶地域)에서 큰 피해를 주는 핵다각체병(核多角體病)은 양잠현장(養蠶現場)에서 잠실(蠶室) 잠구류(蠶具類)의 철저한 포르말린 소독에도 불구하고 예방효과가 의문시(疑問視)되는 경우가 발생하며, 이는 병원체의 존부(存否) 만으로 본 질병(疾病)의 만연(蔓延)이 설명될 수 없기 때문이라는 사실을 실험병리학적(實驗病理學的)으로 입증(立證)하였다. 핵다각체병(核多角體病)의 발생(發生)을 조장(助長)하는 불량(不良) 환경요인(環境要因)을 파악하기 위하여 1979년부터 1993년 까지 15년간 한국 일본 필리핀 등지에서 57건의 사육사례를 조사하였다. 환경상태(環境狀態)와 발병사례(發病事例)의 연관성을 분석하므로써 발병생리(發病生理)와 관련된 환경요인(環境要因)을 해명한 결과, 고름병 발생빈도(發生頻度)는 상엽육과 인공사료육 간에 비슷한 경향을 나타내었고, 잠실 잠구류의 소독(消毒)방법에서는 포르말린 소독(消毒) 여부(與否)에 따른 차이가 인정되지 않았다. 교잡종(交雜種)은 원종(原種)보다 핵다각체병(核多角體病) 발생율이 다소 높은 수준이었으며, 특히 애누에때 부터 장기간 통기불량(通氣不良)인 사육환경에서는 발병률(發病率)이 현저하게 높았다. 또한, 1993년부터 1997년 까지 5년간의 실증시험(實證試驗)에서는 잠실(蠶室) 및 잠구류(蠶具類)의 청소와 사육실의 강제순환식(强制循環式) 환기(換氣)로 사육환경을 개선하므로써 인체(人體)에 유해(有害)한 농약을 사용하지 않고도 누에 핵다각체병(核多角體病) 발생을 효율적으로 제어할 수 있음을 입증(立證)하였다.

The present study hypothesized that ratio between carcass traits components could be applied for the understanding of yield index in Hanwoo steer. A thousand data was generated based on average carcass weight (CW), loin area (LA) and backfat thickness (BT) of Hanwoo steer in December 2018 for analysis 1. Then yield index (YI) was calculated using newly established yield index equation. The correlation between yield index and each carcass traits was visualized. In the interaction between carcass traits components (LA, CW, BT) and YI, only the interactions including BT showed a regular pattern to YI. Then changes of YI according to ratio of carcass traits components were investigated. The observed interactions between LABT and CWBT were similar with Monod equation model. The changes of YI to LABT and CWBT were fitted to Monod equation, and yield constants (K1 for LABT; K2, CWBT) of each equation were calculated as 0.47 and 2.20, respectively. Carcass traits from 5 commercial Hanwoo steer farm were then employed in the second analysis. Yield constants of each farm were estimated. In estimation, R2 value for K1 (LABT) showed greater than the K2 (CWBT). Finally, each farm was plotted based on their K1 and K2 values and it was found that greater yield index of Hanwoo steer was found as increased K1 and K2. As conclusion, the present study suggested the possibility of K1 and K2 values for understanding of yield grade equation and their application in the evaluation of new model for yield grade estimation and feeding strategy.

본 연구는 지속가능발전교육 관점의 숲 체험활동이 유아의 환경보전지식과 환경 친화적 태도에 미치는 영향을 알아보는데 그 목적이 있다. 연구대상은 만 5세 유아 34명을 선정하였으며 수집된 자료는 SPSS WIN21.0 프로그램을 이용하여 독립표본 t검증으로 분석하였다. 연구결과 지속가능발전교육 관점의 숲 체험활동이 유아의 환경보전지식과 환경 친화적 태도에서 통계적으로 유의한 차이를 보였다. 결론적으로 지속가능발전교육 관점의 숲 체험활동이 유아의 환경보전지식과 환경 친화적 태도에 긍정적인 영향을 미쳤다고 볼 수 있으며, 유아교육현장에서 지속적으로 전개된다면 유아의 환경보전지식과 환경 친화적 태도 발달을 향상시킬 수 있는 의미 있는 활동이 될 수 있음을 시사한다.

Total mixed ration (TMR) including concentrate diet and roughage together have been used for the ruminant animal. Relatively high concentrations of moisture and water soluble carbohydrate are representative feature of TMR. Those moisture and water can also provide a niche for bacterial growth. Therefore, a possible fermentation of TMR induced by micro-organism is generally accepted. The present study hypothesized that different lactic acid bacteria could alter fermentation of TMR and subsequently rumen fermentation. Three lactic acid bacteria, Lactobacillus paracasei (A), L. plantarum (B) and L. parabuchneri (C), were employed and 7 treatments under full factorial design were compared with control without inoculation. TMR for dairy cow was used. Significant alterations by treatments were detected at lactic acid and butyric acid contents in TMR (p<0.05). Treatment AC (mixture of A and C) and BC (mixture of B and C) showed great lactate production. Great butyrate production was found at treatment C. At in vitro rumen fermentation, treatments B, C and AB (mixture of A and B) showed significantly great total gas production (p<0.05). All treatments except treatments B and AB, showed less dry matter digestibility, significantly (p<0.05). Total volatile fatty acid production at treatment AC was significantly greater than others (p<0.05). In individual volatile fatty acid production, treatment AB and AC showed great acetate and propionate productions, significantly (p<0.05). This study investigated correlation between organic acid production in TMR and rumen volatile fatty acid production. And it was found that butyric acid in TMR had significant negative correlation with acetate, propionate, total volatile fatty acid, AP ratio and dry matter digestibility.

Roadside native vegetation provides important habitat for plants and animals, and provides visual amenity and beauty for drivers and rural areas. In particular, native wildflowers create and maintain attractive landscaping and scenic vistas while help protect and restore the natural environment. However, it is lacking in government policies and guidelines about using native wildflowers for roadside vegetation and alien invasive plants are a major threat to our environment. The purpose of this study is to review the regulations and programs for roadside vegetation, especially native wildflowers in USA in order to learn lessons about developing wildflower policies in Korea. A summary of results follows: (1) the goals of roadside vegetation have been shifted from beautification for pleasant driving experience to sustainable and economical maintenance. (2) Various funds and laws by federal and local government are essential for native wildflower planting and roadside enhancement. (3) Ongoing projects on seed collection and seed banking of native plants are conducted by wildflower research centers to conserve and propagate endangered plants. (4) Recognizing that wildflower viewing holds tremendous potential, increasing local governments try to grow wildflower tourism for economic benefits. In conclusion, we should establish a long-range plan and regulations on roadside wildflowers planting in order to create safe and sustainable transportation corridors in Korea. In addition, more research on wildflower habitat and propagation should be warranted and landscape architects should play a definitive role in providing pleasant driving experiences and promoting wildflower tourism.

It is important to understand consumer attitudes associated with their eco-friendly behavior on account of not only environmental reasons, but also corporate aspects. In this study, we examine the relations between variables influencing eco-friendly attitudes and eco-friendly behavioral intentions, namely, recycling, reusing, and reducing (3R). We first, performed a theoretical consideration through reviews of literature on ethical identity, ethical obligation, altruism, and eco-friendly attitudes, and behavioral intentions. Based on the literature review, we designed a study model and drew hypotheses. Further, we collected data using a survey and processed them statistically in order to verify the hypotheses. A total of 265 samples were collected and the data were analyzed using a structural equation model (-LISREL 8.70). The results suggest that ethical identity and altruism significantly influence environmental attitudes. However, the effects of ethical obligations on eco-friendly attitudes are insignificant. The environmental attitudes have a significant effects on the consumer behavioral intention for recycling, reusing, and reducing. Although this study has some limitations, it is expected that it will positively trigger follow-up research.

The purpose of this study is to observe the influence mother's pro-environmental consumption behavior have on the adolescents' environment-friendly attitudes and adolescents' pro-environmental consumption behavior. Also by examining the variable relation, the study scopes out the effectiveness of environmental experience. For the analysis, high school students in Korea were gathered from online and multiple regression analysis, and Baron and Kenny mediation analysis were conducted among a total of 521 surveys. The main findings are as follows: First, mother's pro-environmental consumption behavior were proven to be essential factors that have influence on the adolescents’ environment-friendly attitudes. Second, mother's pro-environmental consumption behavior were proven to be essential factors that have influence on the adolescents’ pro-environmental consumption behavior. Third, mediating effect of adolescents' environment-friendly attitudes was verified in the relationship between mother's and adolescent's pro-environmental consumption behavior. The findings suggest the importance of adolescents' environment-friendly attitudes and improve adolescent's pro-environmental consumption behavior by having practice mother's pro-environmental consumption behavior.

The purpose of this study was to observe the influence adolescents’ environmental experience and environmental consciousness have on the pro-environmental consumption behavior. Also by examining the variable relation, the study scoped out the effectiveness of environmental experience. For the analysis, high school students in Korea were gathered from online and the correlation analysis, multiple regression analysis, and Baron and Kenny mediation analysis were conducted among a total of 521 surveys. The main findings are as follows: First, adolescents’ environmental experience, environmental consciousness and pro-environmental consumption behavior showed a positive relationship. In other words, the more the experience, the more sense of responsibility adolescents had towards the environment and society, leading them to have pro-environmental consumption behavior. Second, environmental experience and environmental consciousness were proven to be essential factors that have influence on the adolescents’ pro-environmental consumption behavior. Third, partial mediating effect of environmental consciousness was verified in accordance with the relationship between environmental experience and pro-environmental consumption behaviour. The findings suggest the importance of adolescents' environmental consciousness and improvement of pro-environmental consumption behavior by having students gain environmental experience.

이 연구는 학교 현장에서 쓰레기 줄이기 활동과 관련하여 환경심리학적 강화물이 환경태도 와 실천의식 및 환경 친화적 행동에 어떻게 영향을 미치는지, 그리고 강화물 중 환경 친화적 행동을 증진하는데 가장 효과적인 것은 무엇이며, 환경심리학적 접근이 환경문제를 해결하는데 어떻게 기여할 것인지를 제시하는 것이다. 이 연구를 위해 경기도 소재 J초등학교 6학년 2개 반 70명을 대상으로 실험 수업과 설문 조사를 실시하였고, 그 연구 결과는 다음과 같다. 첫째, 실험 수업 대상 학생들에게 사전⋅사후 검사를 통해 환경 친화적 행동의 변화를 조사한 결과 환경심리학적 강화접근법은 환경태도와 실천의식 및 환경 친화적 행동을 증진시키는데 효과적 인 것으로 나타났다. 둘째, 환경 친화적 행동을 증진시키데 사용한 강화물의 경우 즐거움이 가 장 효과적이었고, 다음으로 쿠폰 혜택, 명예, 현금 순으로 나타났다. 셋째, 환경규범 활성화와 정적⋅부적 강화접근 및 환경 교육은 환경 친화적 행동의 발생빈도를 증가시키는데 기여함으 로써 환경 보호 기능이 가능하다.

인간은 환경과 끊임없는 상호작용을 통해서 발달하며 특히 아동은 건전한 성장과 발달을 위해 환경적 요인이 더욱 중요하다. 아동 친화적 환경은 아동 중심의 패러다임으로 아동의 욕구를 적극적으로 반영하고 기본적인 아동의 권리를 보장할 수 있도록 조성되어야 한다. 따라서 본 연구의 목적은 아동의 성장과 발달을 도모할 수 있는 환경의 요소를 포함하여 환경의 요인을 범위로 아동 친화적 환경의 개념을 도입한 아동 친화 환경 디자인의 토대를 만드는 것이다. 연구의 방법은 다음과 같다. 첫째, 아동 친화적 환경을 정의하기 위해 유니세프와 유엔아동권리협약에서 제시된 기본 전제들을 개념화하였다. 둘째, 아동 친화적 환경을 디자인하기 위해서 생태학적 이론, 사회적 배제 이론에 근거하여 아동과 관련 있는 환경 요소들을 다차원적, 구조적으로 분석하였다. 셋째, 친화적 환경 디자인 정책을 마련하기 위해 정책목표를 설정하고 비전을 제시하여 친화적 환경 디자인의 전략을 제시하였다. 결과적으로 아동 친화적 환경은 아동에 대한 영향력을 고려하여 조성되어야 하고, 최소한의 안전과 건강을 보장할 수 있도록 모니터링 되어야 한다. 또한 환경과 관련된 모든 사항에 대해 아동의 참여를 보장하고 아동 중심의 예산이 공정하게 분배될 수 있도록 디자인되어야 한다.

본 연구는 가정과 연계한 환경교육활동이 유아의 환경친화적 태도 및 환경 보전 지식에 어떠한 영향을 미치는지 알아보는데 그 목적이 있다. 연구 대상은 제주특별자치도 제주시에 소재한 2곳의 사립유치원에 재원 중인 만 5세 유아 46명으로 실험집단 23명, 통제집단 23명이다. 본 연구의 결과는 첫째, 가정과 연계한 환경교육활동을 경험한 실험집단과 경험하지 않은 통제집단 간의 환경친화적 태도는 통계적으로 유의한 차이가 있었다(t=4.00, p< .05). 이는 가정과 연계한 환경교육활동이 환경친화적 태도에 긍정적인 영향을 미쳤음을 보여주는 것이다. 둘째, 가정과 연계한 환경교육활동을 경험한 실험집단과 경험하지 않은 통제집단 간의 환경 보전 지식에 통계적으로 유의한 차이가 있었다(t=8.31, p< .05). 이는 가정과 연계한 환경교육활동이 환경 보전 지식에 긍정적인 영향을 미쳤음을 보여주는 것이다. 이러한 연구 결과를 통해 유아환경교육은 가정과 연계가 되었을 때 효과적이라는 점을 시사한다.

Bacterial cellulose (BC) has played important role as new functional material for food industry and industrial products based on its unique properties. The interest in BC from static cultures has increased steadily in recent years because of its potential for use in medicine and cosmetics. In this study, we investigated culture condition for BC production by Acetobacter sp. F15 in static culture. The strain F15, which was isolated from decayed fruit, was selected on the basis of BC thickness. The optimal medium compositions for BC production were glucose 7%, soytone 12%, K2HPO4 0.2%, NaH2PO4ㆍ2H2O 0.2%, lactic acid 0.05% and ethanol 0.3%, respectively. The strain F15 was able to produce BC at 26℃-36℃ with a maximum at 32 ℃. BC production occurred at pH 4.5-8 with a maximum at pH 6.5. Under these conditions, a maximum BC thickness of 12.15 mm was achieved after 9 days of cultivation; this value was about 2.3-fold higher than the thickness in basic medium. Scanning electron micrographs showed that BC from the optimal medium was more compact than plant cellulose and was reticulated structure consisting of ultrafine cellulose fibrils. BC from the optimal medium was found to be of cellulose type I, the same as typical native cellulose.