• Proceedings of the Korean Society of Life Science Conference
• /
• 2005.09a
• /
• pp.42-42
• /
• 2005

• Journal of the Korea Academia-Industrial cooperation Society
• /
• v.19 no.10
• /
• pp.231-242
• /
• 2018

This study was performed to determine the effects on psychological and physiological variables of Horticulture Activity Caring Program for major company white-collar workers. Fifty three White-collar Workers participated in study. They were assigned to two groups (experimental group and control group) in random order. Random order is used Excel 2010 program RAND function of Microsoft. During the eight-week trial, the experimental group was treated with Horticulture Activity Caring Program weekly for 90 minute per session. The control group wasn't treated. Measurements of variables (stress, depression, blood glucose, total cholesterol, HDL-C, and LDL-C) were performed at weeks 0 and 8 for all participant. Changes in variables were calculated from baseline to trial completion. The data were collected from July to September 2014. SPSS 21.0 was used for the statistical analysis. : Horticulture Activity Caring Program had positive effects on depression (z=-4.57, p< .000). Conclusion of the study suggest the Horticulture Activity Caring Program may have positive effects on improving depression. We expect that the Horticulture Activity Caring Program will become a complementary and alternative therapy of mental health promotion for the white collar workers.

• Horticultural Science & Technology
• /
• v.35 no.1
• /
• pp.88-97
• /
• 2017

This study explored the physicochemical and nutritional changes associated with storage duration of fresh tomatoes. Fruits of the 'TY Megaton' and 'Yureka' tomato cultivars were harvested at the pink stage and stored at $12^{\circ}C$ for 20 days. During storage, firmness, weight loss, skin color (Hunter L, a, b, a / b values), soluble solids content (SSC), titratable acidity (TA), pH, antioxidant contents (lycopene, ascorbic acid, and total phenolics) and antioxidant activity were evaluated. Firmness was above the minimum marketable limit and fresh weight loss was below maximum acceptable weight loss after 3 weeks of storage, and no deleterious effect on antioxidant contents or activities were observed. Significant differences in SSC, TA, and pH were seen between varieties, but not between fruits stored for different durations. In both varieties, Hunter a values increased more than five-fold after 8 days of storage; this correlated with a more than four-fold accumulation of lycopene after two weeks of storage. The antioxidant activity of tomatoes was highest at the beginning of the storage period, likely because of the effective DPPH - reducing power of ascorbic acid and total phenolics. Antioxidant activity increased after 12 days of storage because of increasing lycopene content. Hence, this study indicates that pink - stage tomatoes may be stored at $12^{\circ}C$ for up to 3 weeks without affecting marketability or nutritional value.

• The Plant Pathology Journal
• /
• v.37 no.6
• /
• pp.632-640
• /
• 2021

Cucumber mosaic virus (CMV) and Pepper mild mottle virus (PMMoV) causes severe economic loss in crop productivity of both agriculture and horticulture crops in Korea. The previous surveys showed that naturally available biopolymer material - chitosan (CS), which is from shrimp cells, reduced CMV accumulation on pepper. To improve the antiviral activity of CS, it was synthesized to form phosphate cross-linked chitosan (PCS) and compared with the original CS. Initially, the activity of CS and PCS (0.01%, 0.05%, and 0.1% concentration) compound against PMMoV infection and replication was tested using a half-leaf assay on Nicotiana glutinosa leaves. The total number of local lesions represented on a leaf of N. glutinosa were counted and analyzed with phosphate buffer treated leaves as a negative control. The leaves treated with a 0.1% concentration of CS or PCS compounds exhibited an inhibition effect by 40-75% compared with the control leaves. The same treatment significantly reduced about 40% CMV accumulation measured by double antibody sandwich enzyme-linked immunosorbent assay and increased the relative expression levels of the NPR1, PR-1, cysteine protease inhibitor gene, LOX, PAL, SRC2, CRF3 and ERF4 genes analyzed by quantitative reverse transcriptase-polymerase chain reaction, in chili pepper plants.

• Food Science and Biotechnology
• /
• v.16 no.2
• /
• pp.290-293
• /
• 2007

Cassumunar ginger (Zingiber montanum Roxb.) was grown in the experimental field at the Department of Horticulture, Kasetsart University, Thailand. The antioxidant activity and volatile oil content of rhizomes of varying age were measured. Antioxidant activity as determined using the DPPH (diphenyl-2-picrylhydrazyl) method differed significantly between samples of different ages. Antioxidant activity and rhizome age were positively correlated, with 22-month old rhizomes showing the highest radical scavenging activity (79.19%). Volatile oil was obtained by steam distillation of fresh rhizomes. The extraction yield of volatile oil was highest in l6-month old rhizomes (13.02 mL/kg). GC-FID data indicated the presence of three major compounds, sabinene, terpinen-4-ol and (E)-1-(3',4'-dimethylphenyl) butadiene (DMPBD), however none of the major components were correlated with the age of rhizome.

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2007.11a
• /
• pp.343.2-343.2
• /
• 2007

See Full Text

• Proceedings of the Plant Resources Society of Korea Conference
• /
• 2007.11a
• /
• pp.344.1-344.1
• /
• 2007

See Full Text

• Journal of People, Plants, and Environment
• /
• v.22 no.6
• /
• pp.601-609
• /
• 2019

The purpose of this study was to investigate the applicability of rational emotive behavior therapy(REBT) technique to the horticultural activity program as a method of reducing irrational beliefs and job-seeking stress, and improving career maturity through the change of irrational beliefs. The subjects were 30 university students with irrational beliefs, 15 of them in the control group and 15 in the experimental group. The horticultural therapy program was carried out in total 10 sessions once a week for one and a half hours. For irrational beliefs, the experimental group showed a significant decrease (p=.002) in the total score after the program, but the control group showed an insignificant change (p=.529). Total job-seeking stress score was decreased significantly in the experimental group (p=.002) after the program, whereas it was increased in the control group (p=.023). For the career maturity, the experimental group showed a significant increase (p=.008) in the total score, whereas the control group showed a significant decrease (p=.028). Therefore, it can be found that REBT applied horticultural activity programs are helpful for reducing irrational beliefs and job-seeking stress and improving career maturity for young adults.

• Korean Journal of Plant Resources
• /
• v.24 no.5
• /
• pp.622-627
• /
• 2011

This study was designed to investigate the possible role of 10 green manure crop extracts in antimicrobial activity against potato common scab (Streptomyces scabiei). Ten green manure crops were extracted with hexane, ether, ethylacetate, methanol and water. The DPPH radical scavenging activity of ether, methanol and water was higher than those of hexane and ethylacetate fractions. The fractions of methanol, ethylacetate, ether and water showed antimicrobial activity against Streptomyces scabiei from the concentration of 0.25 mg/mL. Methanol fraction of Sorghum showed the highest antimicrobial activity against this microorganism. This result suggests the sorghum extract was the best as good green manure crop with antimicrobial activity against Streptomyces scabiei.

• Journal of Environmental Science International
• /
• v.29 no.2
• /
• pp.167-175
• /
• 2020

The purpose of this study was to investigate the effect of shading on the growth and productivity of strawberries. Photosynthesis was normally achieved under natural light without shading treatment, and vegetative growth of under- and aboveground part of strawberry plants were excellent. Strawberry fruit productivity and quality were different depending on shading conditions. In natural light, they were improved possibly by balanced vegetative and reproductive growth. However, under light-shading conditions with insufficient sunshine, photosynthetic activity deteriorated and carbohydrate production was therfore inadequate; this adversely affected plant height and quality. The negative effects were more pronounced at 50% shading condition. Shading treatments resulting in insufficient sunshine had a detrimental impact on plant productivity and growth; this implies that proper shading conditions could heip improve yield and fruit quality.