수박종자의 건열 처리가 발아 및 유묘생장에 미치는 효과

박은지,이정은,안성광,제병일,박영훈,이용재,최영환,강점순 한국환경과학회 2023 한국환경과학회지 Vol.32 No.2

This study was conducted to investigate changes in seed vigor based on temperature of dry heat and duration treatment of watermelon seeds and examine the effect on percent of emergence and seedling vigor. When the upper limit temperature of dry heat treatment was raised to 80℃, the percent of the germination decreased. Moreover, T50 was delayed as the upper limit temperature of dry heat treatment increased. The higher the upper limit temperature of dry heat treatment and the longer the treatment period, the higher the percentage of abnormal seedlings. The optimum upper limit temperature for dry heat treatment was 72℃, and the treatment period was five days. Seed vigor was better maintained at 30℃, 45℃, and 52℃, followed by stepwise exposure to high temperatures of 72℃, the upper limit of dry heat treatment, rather than dry heat treatment at a high temperature of 72℃ for 5 days from the initial stage of treatment. When the fungicide was added during the dry heat treatment process, the germination percentage decreased and the percent of the abnormal seedling percentage increased. However, the addition of 10 mg/kg fungicide did not significantly reduce seed vigor.

단소용 대나무재의 열처리 및 건조

변희섭,오승원,공태석,김종만 한국산림바이오에너지학회 2002 산림바이오에너지 Vol.21 No.3

본 연구는 단소용 대나무 악기재를 효과적으로 건조하기 위하여 열처리 및 몇 가지 스케줄에 의한 건조를 실시하였다. 평균 직경 2.2cm, 길이 60cm정도의 솜대를 이용하였다. 열처리 효과를 평가하기 위하여 무처리 및 열처리재로 구분하였으며 적당한 건조 조건 조사를 위해서 20℃, 65%와 40℃, 40% 그리고 대기상태의 3가지 조건으로 실시하였다. 탄화와 재색의 결함이 발생하지 않는 열처리의 최적 온도 조건은 180℃정도가 적당하였으며 열처리가 할렬의 수와 할렬 크기의 발생을 줄였으며 건조결함을 발생하지 않는 최적의 조건은 온도 20℃, 관계습도 65%이지만 건조를 할 때 기간이 너무 많이 소요되는 단점이 있기 때문에 40℃, 40%에서 건조시키는 것이 더욱 효율적이었다. This study was carried out to investigate a heat treatment condition and suitable drying schedule of bamboo material(Phyllostachys nigra var. henonis) for a vertical flute with small-notched bamboo. It is very important to prevent drying defects during its drying process. We investigated the effort of heat treatment the most suitable drying schedule for small-notched bamboo vertical flute without drying defects in this research. A direct heat treatment method and drying conditions of 3($20^{\circ}C$ 65%, $40^{\circ}C$ 40%, and dry at air condition) were applied to the Bamboo specimen that felled in several areas for a month. The result suggested that the most suitable drying schedule with the less split and the shortest time was to dry at $40^{\circ}C$, 40% condition and it was useful to direct heat-treatment because of reducing the number and size of split during drying bamboo.

종자처리에 의한 상추 품종간 추대반응 차이

황현정 ( Hyeon Jeong Hwang ),이정명 ( Jung Myung Lee ),안종문 ( Jong Moon An ),김세영 ( Se Young Kim ),최근원 ( Geun Won Choi ) 한국환경농학회 2007 한국환경농학회지 Vol.26 No.4

A series of experiments were performed to evaluate effects of lettuce seed treatment with low temperature and dry heat treatment (DHT) on bolting response in the case of spring cultivation. During spring production in greenhouse, bolting response of the plants produced from the treated seeds was faster in the order of low temperature treatment, control and DHT. Plant height was increased 5-10 cm higher by low temperature treatment, but plant growth of some cultivars was inhibited by DHT. Difference on lettuce plant growth between low temperature treatment and DHT was gradually diminished with the lapse of time after transplanting. Fresh weight of plant was not significantly different among all treatments. ``Red Gyeolku`` showed very early bolting response and plant height was significantly promoted by low temperature treatment. However, ``Cheongchima`` showed low bolting percentage after various seed treatments, so it is considered late-bolting cultivar.

스판덱스 코어 나일론 커버링 two way 복합사 직물의 전단특성

李春吉 慶一大學校 2002 論文集 Vol.18 No.-

The two way fabrics woven by spandex-core nylon-covering complex yarn play a decisive role in producing the high quality textile garments. The fabrics used in this experiments, woven by polyurethane 40 denier core filament and nylon 140 denier/ 48 filaments covering yarn, were wet and dry heat treated two way fabrics. We performed the experiments to know the influence of treatment time and temperature on the shear properties of the two way fabrics. In wet treatment, the samples were made by using the two way fabric at boiling temperature through the treatment time of 2, 4, 6, 8, 10 min. respectively. In dry treatment, the samples were made at the temperature of 100, 120, 140, 160℃ for 2, 6, 10, 20 min. respectively. The shear properties of the samples were evaluated by using Kawabata Hand Evaluation System. Through the experiments the following results were obtained. The shear stiffness of the wet treated samples increased according to the treatment time and the shear stiffness of the dry treated samples decreased at the treatment temperature of 160℃ according to the treatment time. The hysteresis of shear force at the shear angle φ=0.5° of the wet treated samples decreased and the hysteresis of shear force at the shear angle φ=0.5° of the dry treated samples decreased at the treatment temperature of 160℃ according to the treatment time. The hysteresis of shear force at the shear angle φ=5°of the wet treated samples had almost the same values but the hysteresis of shear force at the shear angle φ=5°of the dry treated samples decreased over the treatment temperature of 120℃ according to treatment time.

Effective Heat Treatment Techniques for Control of Mung Bean Sprout Rot, Incorporable into Commercial Mass Production

Lee, Jung-Han,Han, Ki-Soo,Kim, Tae-Hyoung,Bae, Dong-Won,Kim, Dong-Kil,Kang, Jin-Ho,Kim, Hee-Kyu The Korean Society of Plant Pathology 2007 Plant Pathology Journal Vol.23 No.3

Seedlot disinfection techniques to control mung bean sprout rot caused by Colletoricum acutatum and C. gloeosporioides were evaluated for commercial production scheme. Soaking seedlots in propolis (100 X) and ethanol (20% for 30 min) appeared promising with control values of 85.5 and 80.8 respectively, but still resulted in up to 20% rot incidence. None of the C. acutatum conidia survived through hot water immersion treatment (HWT) for 10 min at temperatures of 55, 60 and $65^{\circ}C$, whereas the effective range of the dry heat treatment (DHT) was $60-65^{\circ}C$. Tolerance of mung bean seedlot, as estimated by hypocotyl elongation and root growth, was lower for HWT than for DHT. Germination and growth of sprouts were excellent over the range of $55-65^{\circ}C\;at\;5^{\circ}C$ intervals, except for HWT at $65^{\circ}C$ for 5 min. At this marginal condition, heat damage appeared so that approximately 2% of seeds failed to sprout to normal germling and retarded sprouts were less than 5% with coarse wrinkled hypocotyls. These results suggested that DHT would be more feasible to disinfect mung bean seedlots for commercial sprout production. Heat treatment at above ranges was highly effective in eliminating the epiphytic bacterial strains associated with marketed sprout rot samples. HWT of seedlot at 55 and $60^{\circ}C$ for 5 min resulted in successful control of mung bean sprout rot incidence with marketable sprout quality. DHT at 60 and $65^{\circ}C$ for 30 min also gave good results through the small-scale sprouting system. Therefore, we optimized DHT scheme at 60 and $65^{\circ}C$ for 30 min, considering the practical value of seedlot disinfection with high precision and accuracy. This was further proved to be a feasible and reliable method against anthracnose incidence and those bacterial strains associated with marketed sprout rot samples as well, through factory scale mung bean sprout production system.

Effective Heat Treatment Techniques for Control of Mung Bean Sprout Rot,Incorporable into Commercial Mass Production

Jung Han Lee,Ki Soo Han,Tae Hyoung Kim,Dong Won Bae,Dong Kil Kim,Jin Ho Kang,Hee Kyu Kim 한국식물병리학회 2007 Plant Pathology Journal Vol.23 No.3