• Journal of the KSME
• /
• v.22 no.5
• /
• pp.355-359
• /
• 1982

우리 나라에서도 대형 발전용 보일러의 과열기와 재열기에 스테인레스강을 사용하고 있다. 발 전용 보일러가 점차 고온 고압화 되어감에 따라 고온강도와 내식성을 고려하여 과열기 및 재열 기의 재질은 스테인레스강관이 사용되고 있는 실정이다. 그러나 스테인레스강관을 사용함으로써 수증기에 의한 산화가 문제가 되면 1962년 E. Berle에 의해 연구가 시작된 이래 현재까지 연구는 계속되고 있다. 수증기 산화스케일(scale)의 박리탈락은 과열기 및 재열기의 폐색에 의한 보일러 운전에 장해가 되는 예가 있음으로 이 장해에 대하여 운전, 보수, 제작 측면에서 스케일의 발생 원인과 장해 및 대책에 관하여 그간 연구 및 검토한 결과를 종합하여 기술하고자 한다.

• KOREAN ASSOCIATION OF OCCUPATIONAL HEALTH NURSES
• /
• v.2 no.3 s.5
• /
• pp.23-28
• /
• 1995

• Korean Journal of Soil Science and Fertilizer
• /
• v.36 no.6
• /
• pp.417-422
• /
• 2003

The objective of this study was to assess the regime of heat shock protein and leaf temperature caused by high temperature stress in chinese cabbage grown in alpine region. In monsoon period, high temperature and heavy rain have caused a stress condition for the cultured higher plants. Chinese cabbages were grown in different altitude, i.e. 600 m and 1,100 m. It was demonstrated that heat shock protein (Hsp 90) in alpine chinese cabbage leaf was actively expressed by high temperature and surplus nitrogen application. As a results of thermo-graphically observed leaf temperatures, chinese cabbage grown in high altitude region were ranged from 20.5 to $24.3^{\circ}C$ while in low altitude from 24.0 to $31.5^{\circ}C$. Furthermore, analysis of assimilated nutrients indicated that total nitrogen content was higher in plant grown under high temperature than under low temperature.

• The Bimonthly Magazine for Agrochemicals and Plant Protection
• /
• v.13 no.1 s.106
• /
• pp.88-95
• /
• 1992

하우스재배에서 수량이나 품질을 낮추는 주요한 원인 가운데에는 시설내에서 발생하는 병해나 생리장해가 있다. 우리나라는 아직 선진국과 같이 시설이 대형화되고 중장비화(重裝備化)되지는 않았지만 현재에도 하우스 재배가 전업화되고 단지화됨에 따라 자연 연작하지 않을 수 없게 되어 연작장해가 일어나고 있는 실정이다. 즉 하우스 재배에서는 단위면적당 수량을 높이기 위해서 밀식하는 경향인데 비해 하우스내는 고온이고 노지보다 시비량이나 관수량도 많아 비료성분인 염류(鹽類)가 쌓이고 토양 병원균도 많아지고 토양물리성이 나빠져 토양병해나 생리장해가 많이 발생하고 있다. 이 글에서는 하우스 작물의 연작장해의 원인과 실태조사 결과를 분석해보고 다음호에서는 그 대책에 대해 알아본다.

• Journal of Bio-Environment Control
• /
• v.14 no.3
• /
• pp.137-143
• /
• 2005

Oriental melons hold at $38^{\circ}C$ for 48 hours before storage increased their soluble solid, titratable acidity, vitamin C contents and ${\alpha}$-tocopherol activity. These heat treated oriental melons maintained lower production of carbon dioxide, ethylene and acetaldehyde and loss of fresh weight than untreated them, called control, during $3^{\circ}C$ MA storage. After 39 days in storage, the last day of storage, visual quality and internal quality, such as firmness, soluble solid, titratable acidity, vitamin C and ${\alpha}$-tocopherol activity, showed higher in heat treated oriental melons. Especially, Ion leakage of flesh, index of chilling injury, increased remarkably in control, so that heat treatment had to alleviate chilling injury in oriental melon. Moreover, while Alternaria rot was shown in control plot after 25 days in $3^{\circ}C$ MA storage, oriental melons treated heat were not appeared any decomposition after 39 days in $3^{\circ}C$ MA storage. As storage life of oriental melon was calculated by regression equation between visual quality and days in storage, that was longer 8 days in heat treated than control. Consequently, heat treatment that was mild, $38^{\circ}C$ and long period, 48 hours, executed before storage, sterilized surface alleviated chilling injury and lengthened storage life in oriental melons.

• KOREAN JOURNAL OF CROP SCIENCE
• /
• v.31 no.2
• /
• pp.238-241
• /
• 1986

To clarify the effect of silicate application on the reduction of summer drought damage of orchardgrass, a pot experiment treated with 3 levels of available SiO$_2$ 100(control), 150, and 200 ppm was carried out in the phytotron, and field experiment in the medium textured hilly soils also was carried out. The plant height and weight of orchardgrass grown in the pots were increased with increasing of SiO$_2$ application, and the higher content of SiO$_2$ in plant became erect types of leaves with low ethylene evolution. With application of SiO$_2$ in the hilly soils, the reduction of summer drought phenomenon was recognized by the increasing 9% in yield with decreased ethylene evolution at summer drought stage but the nutritive values of the plant were not deteriorated.

• Journal of Bio-Environment Control
• /
• v.20 no.3
• /
• pp.233-240
• /
• 2011

We evaluated the changes of fruit quality factors and the incidence of physiological disorders during the periods of high temperature environment in 'Wonhwang' and 'Whasan' pears to determine appropriate harvest time for exportation. In 'Wonhwang' pears, the fruits harvested at 130 days after full bloom (DAFB) showed 31.3 and 17.6N of flesh firmness after 5 and 10 days after simulated marketing at $30^{\circ}C$, respectively, while those of the fruits harvested at 135 DAFB lowered to 16.7 or 6.9N, respectively. Whereas, 'Whasan' pear showed higher firmness during 14 days of high marketing condition than 'Wonhwang' pears which represented 30.4, 26.5 and 21.6N in the fruits harvested 145, 150 and 155 DAFB, respectively. Higher soluble solid contents and lower acidity values observed in the late harvested fruits in both cultivar along with increased marketing period at $30^{\circ}C$. Late harvested 'Wonhwang' pears showed higher respiration rate and ethylene production than early harvested ones, while those of 'Whasan' pears showed lower values regardless of fruit maturity which represented less than 50% of 'Wonhwang' pears. The incidence of physiological disorders such as internal browning, water soaking, flesh spot decay, core breakdown and pithiness appeared more severely in the fruits of 'Wonhwang' in accordance with the progress of high temperature marketing and fruit maturity. Whereas, those symptoms were occurred only after 14 days of prolonged marketing time in 'Whasan' pears. Consequently, it was needed to pay more attention to determine the ripeness when the fruits exported to the country with high temperature environment, especially in the fruits of 'Wonhwang' pears showing rapid quality loss and severe physiological disorders.

• 농업기술회보
• /
• v.51 no.4
• /
• pp.26-27
• /
• 2014

지구 온난화의 영향으로 여름철 시설하우스 내부온도는 $40{\sim}50^{\circ}C$이상 상승하는 반면 습도는 50~70%로 낮아진다. 우리나라는 여름철에 비가 집중되고 국지성 호우가 증가하는 추세로 6월부터 고온과 과습으로 인해 수정률이 낮아지고 생리장해가 증가되는 등 생산량과 품질이 저하돼 가격변동이 심한 편이다. 때문에, 여름철에도 안정적으로 시설채소를 생산하고 품질이 향상시키기 위한 환경조절 및 작물관리 기술을 소개한다.

• THE HEALTH and ORGANIC FARMING
• /
• no.240
• /
• pp.1-12
• /
• 2007

제6회 '친환경유기농박람회2007' 개최/우리의 산야초-쥐방울덩굴/과일의 생장발육과 무기영양 공급/한.미 FTA 비준에 대비한 명예농림부 장관 초청 Workshop 개최/농림부 발표 "한.미 FTA 보완대책(안)" 골자/산나물도 '친환경인증' 추진/한미 FTA 이후의 우리농업의 살 길/친환경농산물 인증제도의 발전방향/포도 갈색 무늬병의 발병 생태/작물의 고온장해 극복/친환경자재 목록공시제 관리 필요/<암을 이기는 음식>(5) 율무/걷기는 남성에게 최고의 명약/EU, 유기식품 라벨 규정 마련/유기농, 몰락위기 유럽농업 구했다/유용미생물의 개발

• Proceedings of the Korean Society for Bio-Environment Control Conference
• /
• 1995.04a
• /
• pp.66-67
• /
• 1995

상추는 세계에서 가장 많이 재배되는 샐러드용 채소이다. 특히 반결구상추는 유럽을 중심으로 재배되고 있고, 최근에 독특한 향기와 샐러드로서 품질이 우수하여 수경재배 또는 식물공장에서 재배가 급속히 늘고 있다. 반결구상추는 서늘한 기후를 좋아하는 채소로서 고온기 재배는 품질이 떨어지고 tipburn과 같은 생리장해가 많이 나타난다고 알려져 있다. 특히 수경재배에서는 토양재배보다 생육이 다른 관계로 Ca결핍과 같은 장해가 많이 나타나 상품화율이 현저히 떨어지게 된다. (중략)