• The Korean Journal of Community Living Science
• /
• v.15 no.1
• /
• pp.27-33
• /
• 2004

Natural dyeing means coloring with dyes extracted from plants, minerals or animals found in nature. Natural dyeing provides calm and natural colors; it has antibacterial and deodorizing qualities; and the dyeing process is environmentally friendly. This study extracted natural dyes from young fruit by thinning out the superfluous fruits of Naju pear trees, and then examined its dyeing properties, the optimal dyeing conditions, and its color fastness for practical use. The results indicated that dyeing is ideal when it had Cu mordant treatment (5% concentration at 9$0^{\circ}C$, pH 4) for 50 min. The color fastness of natural dyes with Cu mordant treatment was very excellent after rubbing and dry cleaning, and also good after exposure to perspiration, light and washing.

• Korean Journal Plant Pathology
• /
• v.12 no.2
• /
• pp.214-218
• /
• 1996

배나무잎 이상반점증상의 보독여부를 신속정확하게 검정할 수 있는 목본 지표식물을 선발하기 위해 시험을 수행하였다. 신고x조생적 등 5개 교배조합 102개체를 공시해서 1차로 10개체를 선발하였다. 1차로 선발된 개체중에서 전형적인 이상반점증상이 조기에 잘 나타나고 이상반점증상과 유사한 검은무늬병에 저항성인 신고$\times$조생적 86-2-2 계통을 최종선발하였다. 선발된 지표식물을 사용하여 농가포장에서 이상반점 증상의 보독여부를 실증시험한 결과 보독유무의 조기판별이 가능하였다. 이상의 결과에서 최종 선발된 신고$\times$조생적 86-2-2계통을 PS-95로 명명하고자 한다.

• Korean Journal Plant Pathology
• /
• v.12 no.2
• /
• pp.209-213
• /
• 1996

배나무잎 이상반점증상의 발병환경 조건을 조사하고자 실험한 결과 주간 23$^{\circ}C$, 야간 18$^{\circ}C$ 온도조건에서 병징발현이 가장 심하였고 이보다 높은 온도인 28/23$^{\circ}C$와 낮은 온도인 18/13$^{\circ}C$에서는 발병이 아주 적었다. 배나무잎에 봉지를 피복하면 발병이 전혀 없거나 극히 저조하였다. 이것은 봉지내의 온도가 최고 46.8$^{\circ}C$까지 올라가 고온에 의하여 발병이 억제된 것으로 생각된다. 이병주 토양과 건전주 토양의 화학성을 조사한 결과 이병주 토양에서는 건전주 토양보다 유효인산량이 많게 나타났다. 토양수분이 많거나 적었을 때는 병징발현이 다소 늦어지기는 하나 최종 조사시 발병정도는 큰 차이를 나타내지 않았다.

• Proceedings of The Korean Society of Agricultural and Forest Meteorology Conference
• /
• 2005.09a
• /
• pp.71-73
• /
• 2005

• Proceedings of the Korean Society of Applied Pharmacology
• /
• 1998.11a
• /
• pp.187-187
• /
• 1998

The objective was to verify biological activities of fruit and stem of prickly pear(Opuntia ficus indica L. var, saboten Makino). We have determined inhibitory activities on enzymes, such as dopamine ${\beta}$-hydroxylase(DBH), monoamme oxidase A and B(MAO-A, B), and antioxidant activity, in vitro. We purchased dried stem powder and lyophilized fruit powder of prickly pear from CheJu Island, and prepared the extracts with 80% of methanol. The fruit extract showed stronger inhibitory effects on MAO-A and -B and antioxidant activity compared. to the stem extract, on fractionation with hexane, ethyl acetate, butanol and water. Both the stem and the fruit extracts with ethyl acetate showed stronger enzyme inhibitory and antioxidant activities than other extracts. Now we are isolating active principles from both ethyl acetate extracts.

• Korean journal of applied entomology
• /
• v.32 no.4
• /
• pp.373-381
• /
• 1993

Resistance evolution to organophosphate-based pesticides in apple and pear inhabiting arthropods of western North America extends to many classes of pest and some beneficial species. Resistance management programs to minimize resistance in pests while exploiting it in natural enemies have met with mixed success. Among beneficials, resistances have been exploited mostly among predators of pest mites. Evolution of resistant mites, leafminers, leafhopper, aphids, leafrollers and some internal fruit feeders have led to development of new monitoring methods and means to delay or avoid resistance. But it is resistance to azinphosmethyl in codling moth (Cydia pomonella) that is changing the pest control system and moving it from chemical to biologically-based means. Newly merging IPM system will depend more on use of biological, cultural, behavior and genetic controls. But more selective pesticides also will be needed to augment pheromones, resistant host plants and genetically altered organisms. These more biologically-based tactics will be prone to resistance evolution in pests as well, if used too unilaterally and/or too extensively.

• Journal of the Korean Society of Food Culture
• /
• v.18 no.4
• /
• pp.303-310
• /
• 2003

This study was conducted to investigate immunofunctional activity of the polyphenol fractions isolated from Korean pear. In the experimental of Rosette forming cell, the results showed that all the polyphenol fractions enhance the cell count compared with the control group. Especially polyphenol fraction II and III showed highly significant effect on Rosette forming cell, and allergy inhibition. After antigen challenge, histamine content of blood of the polyphenol groups was lowered to near the normal group.

• Food Industry And Nutrition
• /
• v.9 no.2
• /
• pp.53-59
• /
• 2004

• Proceedings of the Zoological Society Korea Conference
• /
• 2000.10a
• /
• pp.219.1-219
• /
• 2000

No Abstract, See Full Text

• The Plant Pathology Journal
• /
• v.15 no.6
• /
• pp.340-344
• /
• 1999

Fungicide-resistant isolates of Monilinia fructicola grew readily on media amended with 0.1, 1.0, 10, 100 and $1,000\mu\textrm{g}$ a.i./ml of carendazim, benomyl, or thiophanate-methyl. However, sensitive isolates did not grow on media amended even with $0.1\mu\textrm{g}$ a.i./ml of carbendazim, $1.0\mu\textrm{g}$ a.i./ml of benomyl or thiophanate-methyl. The fitness compositions including mycelial growth on fungicide-free medium, sporulation on fungicide-free medium and pear, and virulence on pear were not different between resistant and sensitive isolates. The resistant isolates persisted carbendazim resistance during multiple subdulturing and long term storage. The competitive ability of resistant isolates obtained from peach orchards in Korea was similar to those of sensitive isolates.