Dong Chil Chang

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This study was conducted to retard potato (Solanum tuberosum L. cvs Superior, Atlantic, and Jasim) shoot growth by nutrient interruption and thereby induce tuber formation in an aeroponic cultivation system. In the period between 25 and 55 days after transplanting (DAT), a 10-day nutrient interruption was carried out on the potato plants. The interruption(More)
The use of metal-backed tibial plates in total knee replacement prostheses can result in the flow of ultra-high molecular weight polyethylene (UHMWPE) from the tibial insert into a cavity on the metal tray surface. A study of the relationship between the thickness of UHMWPE inserts and the amount of cold extrusion is reported here. An attempt was made to(More)
Three hydroponic systems (aeroponics, aerohydroponics, and deep-water culture) were compared for the production of potato (Solanum tuberosum) seed tubers. Aerohydroponics was designed to improve the root zone environment of aeroponics by maintaining root contact with nutrient solution in the lower part of the beds, while intermittently spraying roots in the(More)
The release of two new potato (Solanum tuberosum L.) cultivars with different maturing characteristics, Haryeong and Jayoung, necessitates the development of appropriate electrical conductivity (EC) recommendations for the nutrient solutions used in hydroponic seed potato production. The two cultivars, along with the standard cultivar, Superior, were grown(More)
The relationship between the severity of natural freezing and frost damage (FFD) and the observed growth recovery and field production of Superior potatoes (Solanum tuberosum L.) was investigated under screen house conditions. Potato plants were damaged by accidental freezing and frost during the early phase of shoot growth, 40 days after planting in(More)
Despite the available reports on hydroponic potato production, little is known about its field establishment, yield components and efficiency of nitrogen (N) use from small hydroponic tubers (HT) planted in fields. Three sizes of HT (0.7 g, 5 g, and 10 g) and conventional cut seed tubers (CT) of about 40 g of medium-early maturity cultivar ‘Superior’ were(More)
Korean Chrysanthemum species naturally distributed throughout Korea is regarded as one of the most popular ornamentals and medicinal herbs. Phylogenetic studies were conducted to evaluate interspecific relationships in 19 populations of Korean Chrysanthemum species including 16 taxa and two outgroups using internal transcribed spacer (ITS1, ITS 2) region(More)
Seasonal experiments, spring studies in 2008 and 2014, and autumn studies in 2008 and 2013, were conducted to investigate the nutritional and structural response of potato leaves to reduced nitrogen (N) supply in the nutrient solution. Tissue culture plantlets of cultivars Atlantic and Superior were transplanted into a recirculating aeroponic system and(More)
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