• Horticultural Science & Technology
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• v.32 no.6
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• pp.771-780
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• 2014

In this study, we aimed to understand the effect of sorbitol and salicylic acid (SA) on quality and functional food contents of tomato. Sole or combined application of sorbitol and SA in different concentrations (0.5 mM and 1.0 mM) greatly improved the characteristics of tomato, such as red color tone, soluble solid content, hardness and weight as well as increasing the functional food contents such as of lycopene, anthocyanins and vitamins in comparison with the control. The cyanidin content increased approximately 52-61% and delphinidin contents also increased 20-24% and 39-41% in tomato plants treated with SA alone and sorbitol with SA, respectively. Furthermore, the sole or combined application of sorbitol and SA also increased the vitamin $B_1$ and C contents. In particular, vitamin C content was increased 1.2-fold by treatment with sorbitol alone and was increased 2-fold by SA treatment compared to the control. In the sorbitol with SA treatments, vitamin C content was approximately 4-fold increased relative to control plants.

• Journal of Life Science
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• v.25 no.1
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• pp.75-83
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• 2015

Curcuma longa L. (CL), a traditional medicinal plant, is well known as a functional food ingredient. The major component of CL is a curcumin of anthocyanin family that has multi-functions such as antimicrobial, anticancer, and antioxidant activity. In this study, fermented milk containing CL was prepared using a mixed strain culture (Bifidobacterium bifidus, Streptococcus thermophilus, Lactobacillus acidophilus), and its physicochemical properties were characterized. In addition, inflammatory cytokine-modulating effects of the fermented milk were also investigated. As regards the properties of fermented milk, the growth rate of lactic acid bacteria in fermented milk containing CL was found to be remarkably more rapid than control. During fermentation, caseins and whey proteins were observed to be partially hydrolyzed, and lactic acid and acetic acid were produced in larger amounts than in the control. The sensory score of fermented milk containing CL was lower than control, owing to its bitter taste and strong flavor. RAW 264.7 cells treated with CL fermented milk supernatant showed no cytotoxicity. Inflammatory cytokines such as tumor necrosis factor-alpha (TNF-${\alpha}$) and interleukin-6 (IL-6) were significantly produced by fermented milk with CL, compared to control. The secretion of nitric oxide (NO) from RAW 264.7 cells significantly increased relative to the control. Results from the present study suggested that CL could be used as a natural immunomodulating ingredient for making yogurts, beverages, and other products.

• Korean journal of food and cookery science
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• v.32 no.6
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• pp.677-685
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• 2016

Purpose: Molecular press dehydration is one of the dehydration methods. The purpose of this study was to investigate the quality characteristics of tarts made with dehydrated purple sweet potatoes during the storage period. Methods: Quality characteristics of purple sweet potato tarts were evaluated by analyzing moisture content, water activity, total phenolics, anthocyanins, 2,2-diphenyl-1-picrylhydrazyl (DPPH) free radical scavenging activity, color, and sensory evaluation for 45 days of storage. Results: Moisture content of tart crust made with molecular press dehydration treated purple sweet potatoes with concentrations of 20%, 40%, 60%, and 80% maltodextrin as a dehydrating agent for 45 days was 8.47%, 7.95%, 6.96%, and 6.24% respectively; however, the moisture content of non-treated tart crust was 11.99% (p<0.05). Total phenolics, anthocyanins, and DPPH free radical scavenging activity of dehydrated purple sweet potato tarts were lowered than those of non-treated tart (p<0.05). Conclusion: These results indicated that tarts made with molecular press dehydrated purple sweet potatoes had effectively controlled moisture content and water activity during storage although total phenolics, anthocyanins, DPPH free radical scavenging activity, color, and sensory evaluation were decreased.

• Korean Journal of Plant Tissue Culture
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• v.25 no.5
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• pp.341-346
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• 1998

In this paper we describe the cloning and expression of the genes encoding the flavonoid-biosynthetic enzyme dihydroflavonol 4-reductase (DFR) in Matthiola incana R. Br. A heterologous cDNA probe from Zea mays was used to isolate full-size DFR cDNA clone from a corolla-specific cDNA library. Comparison of the coding region of this DFR cDNA sequence including the sequences of Zea mays, Anthirrinum majus, Petunia hybrida, Callistephus chinensis, Dianthus caryophyllus and Rosa hybrida reveals a identity higher than 61% at the nucleotide level. The DFR transcript is G/C rich in monocotyledonous plants show a strong codon bias preferring codons with a G or C in the third position. The function of this nucleotide sequences were verified by comparison with amino acid sequences of the amino-terminus and tryptic peptides from purified plant enzyme, by northern blotting with mRNA from wild type and mutant plants and by in vitro expression yielding an enzymatically active reductase. Genomic southern blot analysis showed the presence of one gene for DFR in Matthiola incana. Northern blot analysis of the DFR wild type and mutant lines showed that the lack of DFR activity in the stable acyanic mutant k17b is clearly by a transcriptional block of the DFR gene.

• Weed & Turfgrass Science
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• v.6 no.3
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• pp.196-202
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• 2017

This study was conducted to investigate the change of yield and quality according to seeding time and planting density and to determine effective weed control method in wet-hill-seeding use black colored rice. The most effective weed control system was application of bromobutide thiobencarb five days before seeding followed by bensulfuron mefenacet thiobencarb 12 days after seeding (barnyardgrass at 2.5-3.0 leaf stage). The seedling stand by seeding time and planting density increased with the delay seeding time and high planting density. The heading dates were delayed as the seeding time became late but no difference was found between planting density. The anthocyanin content of black colored rice was higher at late seeding time and lower planting density. The yield of full colored rice was high 80 plants per $3.3m^2$ in seeding on May 30 and June 10. This information could be useful for spreading rice direct seeding by inducing stabilization of wet-hill-seeding use black colored rice.

• The Korean Journal of Food And Nutrition
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• v.19 no.3
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• pp.311-317
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• 2006

Physicochemical analysis of the wild grape juice and its wine extracted with ethanol were assessed. The contents of moisture in wild grape juice and its wine were 78.7${\pm}$0.2% and 74.4${\pm}$O.4%, respectively. Total anthocyanin and flavonoid contents of wild grape juice were higher 4 times and 10 times than those of wild grape wine, respectively. Of the 17 amino acids, the glutamic acid in wild gape juice and threonine in wild grape wine were the highest, which were 43.7${\pm}$1.4mg/100 g and 14.1${\pm}$0.7 mg/100 g, respectively. Electron donating abilities of wild grape juice and its wine at concentration of 1,000 ${\mu}$g/ml were 93.1${\pm}$1.2% and 88.9${\pm}$O.8%, respectively. The nitrite scavenging abilities of wild grape juice and its wine were gradually increased by increasing levels of the extracts to 79.6${\pm}$1.27% and 72.8${\pm}$1.01% at concentration of 1,000 ${\mu}$g/ml under pH 2.5.

• Horticultural Science & Technology
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• v.28 no.6
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• pp.948-953
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• 2010

We evaluated the bioactive compounds including carbohydrates (CH), organic acids (OA), ascorbic acid (AA), anthocyanin (AC), and ellagic acid (EA) in the achenes, epidermis, and flesh of fully ripe strawberry fruits of the 'Maehyang', 'Seolhyang', 'Keumhyang', 'Akiheme', and 'Red pearl' cultivars. The total contents of CH, OA, AA, and AC were significantly greater in the epidermis than in other tissues, while the EA content was significantly greater in the achenes than in other tissues. The AA content of the epidermis ranged from $49.1-69.2mg{\cdot}100g^{-1}$ FW and was significantly greater than the content of the flesh, while AA was not detected in the achenes of any of the tested strawberry cultivars. The AA contents of the epidermis and flesh of the 'Maehyang' were 69.2 and $42.2mg{\cdot}100g^{-1}$ FW, respectively, and were greater than those of the other cultivars. The AC contents in the epidermis and achenes of the 'Keumhyang' were $74.0mg{\cdot}100g^{-1}$ FW and $36.7mg{\cdot}100g^{-1}$ DW, respectively, greater than those of the other cultivars. The EA content of the achenes of the 'Seolhyang' was $215.5mg{\cdot}100g^{-1}$ DW, significantly greater than those of the other cultivars. Results indicate that the antioxidant levels and other chemical compounds of strawberry fruits vary significantly among different fruit tissues. Our results also suggest that the recently introduced Korean 'Maehyang', 'Seolhyang', and 'Keumhyang' contain higher levels of antioxidants than other major June-bearing strawberry cultivars. These cultivars are feasible selections for both growers and consumers.

• Horticultural Science & Technology
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• v.32 no.3
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• pp.303-309
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• 2014

The purpose of this study is to suggest indicators and proper standards to forecast the sensory quality of 'Hongisul' grape. Further, this study determines the optimum fruit load of 'Hongisul' grape reflecting consumer preference. Among several quality attributes, identified through instrumental and sensory evaluation, soluble solid-acid ratio was the most useful indicator of consumer preference for 'Hongisul' grapes. The ideal soluble solid-acid ratio for marketable grapes was found to be higher than 86.3. Analysis on the effects of fruit load control on fruit quality revealed a negative correlation where the latter increased as the former decreased. This trend is common for all grape species. The field with a fruit load of $1,400kg{\cdot}10a^{-1}$ exhibited a soluble solid-acid ratio of less than 86.3, uneven coloring and slow softening texture at the mature stage. However, fruit quality proved excellent in the field with a fruit load of $1,200kg{\cdot}10a^{-1}$ or less. It is therefore proposed that fruit load should be controlled to $1,200kg{\cdot}10a^{-1}$ or less when growing 'Hongisul' grapes to produce high quality grapes. We believe that this result can be used as a standard in judging harvest time and evaluating fruit quality.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.53 no.2
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• pp.233-238
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• 2008

This experiment was conducted to enhance the colored potatoes utilization and to determine the biological activity of colored potato extracts. In order to understand the factors responsible for the potent anti-oxidant ability of colored potatoes, it has been evaluated for anti-oxidative activity using oxygen radical absorbance capacity (ORAC) assay. 'Hongyoung' extract was significant anti-oxidant activities in ORAC assay. About two-fold higher radical absorbance capacity was found in 'Hongyoung' compared to that in 'Jayoung'. The ability of 80% ethanol extracts from colored potatoes to influence the inhibitory activity of nitric oxide (NO) and nitric oxide synthase (iNOS), cyclooxygenase-2 (COX-2) has also been investigated. The various therapeutic benefit claims in the new functional medicinal usage of colored potatoes ascribed to the phenolic compounds and anthocyanin. This result revealed that the extracts of colored potatoes are expected to be good candidate for development into sources of free radical scavenger or COX-2 inhibiting agents.

• Korean Journal of Food Science and Technology
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• v.47 no.4
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• pp.452-459
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• 2015

The effects of aronia powder on the rheological and sensory characteristics of Sulgidduk were investigated. The moisture content of Sulgidduk ranged from 40.86 to 44.40%; however, addition of aronia powder to Sulgidduk tended to decrease its moisture content. With regard to the rheological properties, the addition of aronia powder decreased the hardness, springiness, adhesiveness, cohesiveness, chewiness, gumminess, and brittleness of Sulgidduk. Chromaticity determination revealed a decrease in L and b values, while the a value increased with the increasing amounts of aronia powder. Total polyphenol, total flavonoid and total anthocyanin contents increased with the increasing amounts of aronia powder. Antioxidant activity, measured by DPPH and ABTS radical scavenging activities, was significantly higher than that of the control, and increased proportionally with the amount of aronia powder. During 4 day storage, the growth of total aerobic colony and coliform content significantly decreased with increasing levels of aronia powder in Sulgidduk. Sensory evaluation demonstrated the best score in color, taste and overall acceptance when aronia powder was added at 5% of rice powder. These results suggest that 5% aronia powder can be added for the preparation of Sulgidduk.