• Food Science and Biotechnology
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• v.18 no.2
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• pp.362-366
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• 2009

This research was conducted to determine the effect of far-infrared ray (FIR) irradiation of grape berries as a potential application for manufacturing grape products with a high amount of antioxidant chemicals. Two grape cultivars, the red grape cv. Campbell Early and the white grape cv. Thompson Seedless, produced increased amounts of crude extracts, in the FIR treatments compared to a non-FIR treatment control with same temperature. However, total phenolic concentrations and antioxidant activity in a 'Campbell Early' increased in the extracts following FIR treatment, whereas those of 'Thompson Seedless' did not increase significantly. High performance liquid chromatography (HPLC) analysis indicated that functional components affecting antioxidant activity were significantly increased in the extract of 'Campbell Early' following FIR treatment. Our results indicate that application of FIR treatment in heat process of grapes increases levels of antioxidative phenolic chemicals and it may help to enhance the availability of antioxidative compounds in various grape food products.

• Korean Journal of Plant Resources
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• v.37 no.1
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• pp.93-99
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• 2024

As a result of low temperature exotherm (LTE) measurement targeting the buds of 13 grape cultivars that are recently cultivated or introduced in Korea, 'Shooting Star', 'Muscat Bailey A', 'IFG-6', 'Vanessa Seedless', 'Summer Crispy', 'Shine Muscat', 'Jelly Pop', 'Campbell Early', 'Ruby Seedless', 'My Heart', 'Kyoho', 'Thompson Seedless', and 'Violet King' in order of being resistant to low temperatures. The LTE value was the lowest at -18.9℃ in 'Shooting Star' and the highest at -12.5℃ in 'Violet King'. Through these results, it can be used as basic data to determine whether or not cultivation by region is possible efficiently by comparing data based on 'Campbell Early' and 'Kyoho', which are presented as standard varieties for domestic cultivation.

• Horticultural Science & Technology
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• v.29 no.5
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• pp.507-509
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• 2011

'Heukisul' (3x) a cross made in 2000 between 'Kyoho' (4x, Vitis sp.) and 'Thompson Seedless' (2x, Vitis vinifera L.) in a seedless grape breeding program, was preliminarily selected in 2004. After regional adaptation testing under the name of 'KTS014' at two sites during 2004-2005, it was finally selected in 2006. 'Heukisul' showed low incidence of berry shattering, resulting in a good berry set compared to 'King Dela'. 'Heukisul' had budburst on April 23, flowering on in June 9, and fruit maturation in September 29 (almost the same as 'King Dela' at Chuncheon), and it was considered a midseason cultivar. The mean berry weight was 4.0 g, about 0.7 g heavier than 'King Dela', and mean soluble solids were $21.9\;^{\circ}Brix$, about $2.7\;^{\circ}Brix$ higher than 'King Dela'. The skin color was dark violet with abundant bloom and the flesh was very firm. Although the cluster was compact, it required no cluster thinning. Also the incidence of berry cracking was very low.

• Korean Journal of Agricultural Science
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• v.46 no.1
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• pp.45-56
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• 2019

As a result of analyzing the quality of imported grapes during the 2018 season, the hardness of the grape berry was found to be 10 N or less in total. In the case of Chilean grapes, the soluble solids tended to be lower as imports and distribution periods were delayed. The berry weight was the largest at 14.4 - 14.8 g for the 'Red Globe', 7.1 - 7.4 g for the 'Thompson Seedless' and 6.0 - 7.0 g for the 'Crimson Seedless'. The 'Crimson Seedless' grapes imported from Chile, which had a high berry shatter rate, had a shorter pedicel length, pad width and brush length than that of the other 2 varieties. Regardless of the grape varieties, the weight loss during the distribution at room temperature ($25^{\circ}C$) increased rapidly as the import season was delayed. Additionally, it was found that the later the distribution seasons, a higher stem browning index was observed regardless of the variety. The 'Thompson Seedless' was revealed to be more susceptible to browning than that of the other varieties. The shrinkage of the stem and the pedicel browning progressed within a short time during shelf-life as the distribution time was delayed. The incidence of berry decay of the imported grapes tended to increase with the progression of the distribution period. In the fruits distributed on April, except for the 'Crimson Seedless', the grapes were rapidly corrupted in the second half of the distribution. The 'Red Globe' grapes completely lost marketability due to a berry decay of 26.1% and 69.9% at 9 and 12 days after shelf-life, respectively.

• Korean Journal of Food Science and Technology
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• v.52 no.3
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• pp.205-211
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• 2020

In this study, fruit phenolics were investigated with using LC/MS and HPLC analysis in order to compare the differences between domestic ('Campbell Early', 'Kyoho', 'Heukbosuk', and 'Hongju SDS') and imported ('Crimson SDS' and 'Thomson SDS') grapes. In the case of fruit characteristics, imported grape 'Crimson SDS' and 'Thompson SDS', had lighter skin weight (300-350 mg/berry) and hard flesh (5.2-5.6 kg·f) than domestic grape cultivar. The phenolic compound contents of 'Crimson SDS' skin was higher, but resveratrol (25-29 mg/kg), quercetin (350-380 mg/kg), and myricetin (31-32 mg/kg) contents were similar in to those of 'Hongju SDS'. The anthocyanin content was different from differed between grape cultivars. 'Hongju SDS' grape was showed higher in Delphinidin-3-glucose (D3G) levels, and 'Crimson SDS' was showed higher in Peonidin-3-glucoside (P3G) levels. The contents of phenolic compounds were investigated differently for each grape berry part. Catechin, epicatechin, procyanidin B1, and B2 were found in grape seeds.