• Journal of Life Science
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• v.28 no.10
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• pp.1193-1200
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• 2018

This study investigated the physiochemical properties, antioxidative, nitrite-scavenging, and alcohol metabolism enzyme activities of nectarine vinegar prepared by a traditional fermentation method. The pH of nectarine vinegar was 3.70, the sugar content was $8.87^{\circ}Brix$, and the total acidity was 6.29%. Among organic acids detected, acetic acid was highest at 32.42 mg/ml, followed by lactic acid, malic acid, and succinic acid. Total phenol content of the nectarine vinegar was $121.84{\mu}g$ tannic acid equivalents (TAE)/100 ml. The antioxidative effects of muskmelon vinegar were measured using 1,1-Diphenyl2-picrylhydrazy (DPPH) radical-scavenging activity and superoxide dismutase (SOD) assay. DPPH of nectarine vinegar was increased in a dose-dependent manner, which was 84.47% at 40% concentration. SOD activity was increased in a dose-dependent manner, which was 89.06% at 60% concentration. Nitric scavenging activities of nectarine vinegar were 94.17%, 76.91%, and 20.21% at pH values 1.2, 3.0, and 6.0 at 100% concentration, respectively. The effects of nectarine vinegar on alcohol-metabolism were determined by measuring the generation of reduced nicotinamide adenine dinucleotide (NADH) by alcohol dehydrogenase (ADH) and acetaldehyde dehydrogenase (ALDH). ADH and ALDH activities of nectarine vinegar were increased in a dose-dependent manner, which were 153.61% and 178.20 % at 60% concentration, respectively. These results suggest that nectarine vinegar has great potential as a resource for high quality functional health beverages.

• Horticultural Science & Technology
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• v.17 no.1
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• pp.15-16
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• 1999

'Cheonhong'was released by the National Horticultural Research Institute in 1992 as a new mid-ripening, yellow-fleshed, and freestone nectarine variety, which originated from open-pollinated seeds of 'Garden State' nectarine collected in 1978. This was tested as 'Wonkyo Da-03' at 4 areas for 4 years from 1989. 'Cheonhong' is resistant to fruit cracking during rainy season and russeting. Fruits mature about 15 days before 'SunGlo' and have rich-flavor and good quality.

• Proceedings of the Korean Society of Plant Pathology Conference
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• 1999.10a
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• pp.71.1-71
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• 1999

• Korean Journal of Soil Science and Fertilizer
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• v.35 no.3
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• pp.175-184
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• 2002

Soil chemical parameters of peach orchards and the concentration of nutrients in peach leaves were investigated. Results of soil analysis showed that pH value and content of exchangeable calcium was quite low, required to adjust soil acidity in many investigated soils. Nitrogen and phosphorous contents in leaves were founded to be excessive comparing to RDA's optimal levels(N $29.3{\sim}35.9g\;kg^{-1}$, P $1.7{\sim}2.2g\;kg^{-1}$), while calcium contents were lower than optimal levels($11.2{\sim}21.0g\;kg^{-1}$) in many sites and Potassium content was higher in peach cultivars than nectarine cultivars. Correlation analysis revealed that organic matter contents in subsoils and exchangeable calcium content in soils(top and subsoil) were increased with cultivation year, but available phosphate contents in subsoils were decreased. Organic matter and exchangeable magnesium contents in top soils were positively correlated with potassium and magnesium contents in leaves, whereas were negatively correlated with calcium contents in leaves, impling antagonistic absorption of calcium against potassium and magnesium. The findings indicated that most of soils ought to managed to adjust soil acidity and application amount of nitrogen, phosphorous fertilizer and compost should be controlled properly.

• Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
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• 2007.11a
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• pp.166.2-166.2
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• 2007

• Journal of the Korean Society of Food Science and Nutrition
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• v.39 no.9
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• pp.1379-1383
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• 2010

Nectarine beverage treated with cellulase and pectinase enzymes was measured for mineral contents, total flavonoids, and free amino acids and DPPH radical scavenging effect, nitrite scavenging effect. Total flavonoid contents of the no treatment, treated with pectinase, with cellulase, and with both measured 0.146 mg/mL, 0.167 mg/mL, 0.148 mg/mL and 0.171 mg/mL, respectively. DPPH was measured as 13.42% with no treatment and more than 28.98% with enzyme treatments. Nitrite scavenging effect with no treatment was 79% at pH 1.2. Whereas, it was measured above 90% while treated with enzymes at pH 1.2. And also, the nitrite scavenging effect was slightly higher at pH 3.0, pH 4.0 and pH 6.0 than no treatment. Results of free amino acids analysis revealed that, aspartic acid, serine, alanine, $\gamma$-aminobutylic acid, and glutamic acid were present with the amount ranging from 86.71% to 94.14% from total detected free amino acids. Ornithine and taurine were also observed from the beverages. The mineral contents, nitrogen element (T-N) of enzyme treatment of nectarine beverages were measured slightly higher than T-N of no treatment, however, the $P_2O_5$ was similar. Moreover, CaO, MgO and $K_2O$ in the beverages were measured above 45 mg/L, 85 mg/L and 2,133 mg/L, respectively.

• Korean Journal of Plant Tissue Culture
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• v.25 no.2
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• pp.99-102
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• 1998

The most effective medium for shoot initiation in vitro of peach cv. Baekmijosaeng, Yumyeong and nectarine cv. Cheonhong was Quoirin and Lepoivre medium(LP). 20 g/L and 30 g/L sorbitol as carbon source were effective for shoot proliferation of cv. Baekmijosaeng. Addition of 500 mg/L lacto albumin enzymatic hydrolysate(LH) increased shoot number per explant of cv. Baekmijosaeng peach. Removing the apical meristem and horizontal placing of explants on the medium increased cv. Baekmijosaeng shoot.

• Horticultural Science & Technology
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• v.17 no.1
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• pp.17-18
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• 1999

'Baekhyang' was released by National Horticultural Research Institute in 1994 as a white-fleshed, late-maturing, and freestone peach variety, which originated from open-pollinated seeds of 'Garden State' nectarine collected in 1978. This variety was tested as 'Wonkyo Da-05' at 4 areas for 4 years from 1991. 'Baekhyang' is the latest maturing among white-fleshed peach varieties in Korea. Fruits mature 10 to 15 days after 'Yumyeong' and have rich-flavor and good quality.

• The Plant Pathology Journal
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• v.25 no.4
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• pp.429-432
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• 2009

An unreported disease of apricot was observed in orchards in Zhejiang province, China. Symptoms started as water soaked lesions on the fruit surface. Later, water-soaked areas developed and spread to the entire fruit, resulting in soft rot of the whole fruit. The causal organism isolated from symptomatic fruits was identified as Burkholderia cepacia based on its biochemical and physiological characteristics and confirmed by the cellular fatty acid composition and Biolog data as well as 16S rRNA gene sequence analysis. The bacterial isolates caused similar symptoms when inoculated onto fruits of apricot. In addition, European plum, Japanese plum, nectarine and kiwifruit were susceptible to the B. cepacia pathogen. However, the B. cepacia pathogen failed to cause any visible symptoms when it was inoculated onto 16 other fruits. This is the first report of a bacterial disease of apricot caused by B. cepacia in China.

• Korean Journal of Agricultural Science
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• v.46 no.4
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• pp.737-754
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• 2019

Peaches have soft tissues compared to other fruits and are vulnerable to softness, wounds, and loss of marketability due to the weak fruit hardness after harvest. It is necessary to develop a technology to improve the shelf-life of the fruit to expand the distribution of peaches. Calcium compounds and chitosan have an important role in improving the shelf-life of fruit by maintaining the hardness and reducing the respiration rate in peach fruits. In this study, to select useful compounds to improve the shelf-life of peaches, calcium citrate, calcium chloride, calcium nitrate, GH-Ca, OS-Ca, chitosan, and chitosan dissolved in calcium chloride were sprayed onto peach trees. The characteristics of the harvested fruits were investigated after the 'Kumhong' and 'Madoka' peach tree treatments. The hardness of the fruit was kept the highest with the combined treatment and remained high with the calcium citrate, chitosan and calcium nitrate treatments. Ethylene production and respiration were effectively inhibited by the GH-Ca and chitosan treatments. There was no significant difference in soluble solids content and acidity among the fruits treated with the chemicals. The coloration of the fruit skin was not delayed by the calcium and chitosan chemical treatments. Calcium compounds were increased in the fruits and leaves of the peach trees treated with the chemicals compared to the untreated ones. These results suggest that the calcium treatment extended the shelf-life by increasing the calcium content in the leaves and fruits of the peach trees.