• Title/Summary/Keyword: Korean jujube fruit

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Investigation of Packaging of Fresh Jujube (Zizyphus jujuba) on Quality during Storage (농가에서 활용가능한 생대추의 저장조건 연구)

  • Chung, Hyun-Jung
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.42 no.8
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    • pp.1296-1302
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    • 2013
  • The quality of fresh jujube (Zizyphus jujuba) fruit rapidly declines in the postharvest stage and thus the effective storage conditions for agricultural warehouses were investigated in this study. Fresh jujubes (~10 kg) were stored using five different storage methods: plastic box without further packaging as a control (C-PL), plastic box with hanji packaging (H-PL), plastic box with functional film packaging (F-PL), cardboard box with hanji packaging (H-CB), and cardboard box with functional film packaging (F-CB). The storage boxes were stored in a refrigerator ($0^{\circ}C$ and 80~90% RH), equipped with an ethylene gas scavenging device for 9 weeks and then the quality characteristics were analyzed. The control storage conditions of jujubes showed a substantial decline in quality with decreases in moisture content, hardness, and sugar content as well as increases in decay ratio and redness. Among the tested storage conditions, F-CB was most effective in terms of maintaining the quality of jujube fruit while maintaining firmness, weightlessness, ripening degree from redness and visible appearance. In conclusion, effective storage and packaging conditions during storage enabled maintenance of fruit quality of jujubes for 9 weeks.

Scale Insects (Stenorrhyncha) Occurred on Fruit Trees in Korea (국내 과수에 발생하는 깍지벌레(진딧물아목)의 종류)

  • 권기면;한만종
    • Korean journal of applied entomology
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    • v.42 no.4
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    • pp.279-288
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    • 2003
  • A total of 29 scale insect species belonging to 21 genera of five families were recognized on 11 fruit trees on the basis of specimens collected from 2001 to 2002 and specimens deposited in the Insect Collection of NIAST in Korea. Ten species were recognized on apple, nine species on pear, three species on peach, 14 species on unshiu orange, nine species on persimmon, two species on Japanese plum, one species on japanese apricot, 10 species on junos orange, one species on grape, four species on jujube and three species on kiwi fruit.

Physicochemical Properties of Ripe and Dry Jujube ($Ziziphus$ $jujuba$ Miller) Fruits (성숙과 건조 대추의 이화학적 특성)

  • Hong, Ju-Yeon;Nam, Hak-Sik;Shin, Seung-Ryeul
    • Food Science and Preservation
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    • v.19 no.1
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    • pp.87-94
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    • 2012
  • This study was carried out to investigate the physicochemical characteristics of maturating and dried jujube. The moisture contents of the unripe and ripe jujube were found to be 84.66 and 66.45%, respectively, but that of the dried jujube was 31.48%. The crude-fat and crude-ash contents of the dried jujube were much higher than those of the maturing jujube. The carbohydrate contents of the unripe, ripe, and dried jujube were found to be 13.51, 27.94, and 61.70%, respectively, and the soluble-protein contents were 0.88, 1.73, and 3.71%. The reducing-sugar content of the dried jujube was 18.82%, higher than that of the ripe jujube. The sucrose contents of the unripe and ripe jujube were 10.15 and 16.66 g/100 g, respectively, and that of the dried jujube was 33.46 g/100 g. The major fatty acids that were found to compose jujube were palmitic, oleic, pamitoleic, linoleic, and linolenic acid. The myristoleic and arachidonic acid contents were higher in the dried jujube than in the ripe jujube, but the palmitoleic acid content was lower in the dried jujube than in the ripe jujube. The major minerals of jujube were found to be Ca, K, Mg, and P, and the total mineral contents of the unripe, ripe, and dried jujube in this study were 343.38, 584.94, and 331.56 mg/100 g, respectively. The polyphenol contents of the unripe, ripe, and dried jujube were 309.12, 248.80, and 23.34 mg/100 g, respectively, while the vitamin C contents were 610.04, 310.22, and 423.27 mg/100 g.

Occurrence of Fruit Flies (Diptera: Tephritidae) in Fruit Orchards from Myanmar (미얀마 과수원에서 과실파리 발생에 관한 연구)

  • Win, Nan Zarchi;Mi, Khin Mi;Oo, Thi Tar;Win, Kyaw Kyaw;Park, Jinyoung;Park, Jong Kyun
    • Korean journal of applied entomology
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    • v.53 no.4
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    • pp.323-329
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    • 2014
  • Population of fruit flies was monitored by using methyl eugenol trap during 2010-2011 in Yezin, Myanmar. Population numbers were analyzed with meteorological factors including rainfall, temperature, relative humidity and duration of sunshine. Samples of mango, guava, and jujube fruits were collected from orchards. The fruits were kept in containers so that the species of flies infesting the fruit could be identified when the adult insects emerged and to assess damage caused by fruit flies. Regression analyses indicated that populations of fruit flies were observed to be positively correlative with rainfall, minimum temperature and relative humidity, and negatively correlative with the duration of sunshine. Eleven species of fruit flies, Bactrocera arecae, B. carambolae, B. correcta, B. dorsalis, B. kandiensis, B. latilineola, B. malaysiensis, B. neocognata, B. raiensis, B. verbascifoliae, and Carpomya vesuvina, were identified. B. correcta and B. dorsalis were the most abundant and accounted for 29.3% and 28.6% of total emerged adults in the different fruit samples. The highest percentage of fruit damage was observed on guava ($59{\pm}15.4$), followed by mango ($35.5{\pm}12.1$) while the lowest was recorded on jujube ($18.5{\pm}7.9$).

Analysis of Genetic Characteristic of Jujube (Ziziphus jujuba Mill.) Cultivated in Korea Revealed by ISSR Markers (ISSR 표지를 이용한 국내 재배 대추나무의 유전특성 분석)

  • Nam, Jae-Ik;Lee, Uk;Kim, Sea-Hyun
    • Journal of Korean Society of Forest Science
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    • v.107 no.4
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    • pp.378-384
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    • 2018
  • Chinese jujube (Ziziphus jujuba Mill.), a member of family Rhamnaceae, is an economically important species. It has high nutritional value in fruits, and its medicinal properties have led to extensive use in traditional oriental medicine. In this study, we investigated the genetic characteristics of 270 jujube germplasms collected from the six major jujube fruit production areas in Korea including Boeun and Gyeongsan, in order to understand the current situation on cultivated varieties of domestic jujube and to obtain useful data for selection of superior germplasms and establishing their breeding plans. The results of ISSR marker analysis revealed that the Shannon's information index of the 270 germplasms was 0.107 and the genetic similarity was as high as 0.935 showing the dominance of a specific cultivar or germplasm, and almost 67% (180) of them were identified at the same genotype with 'Bokjo'. The domestic commercial jujube populations could be characterized by very low genetic diversity and thus may be vulnerable to external disturbances. In addition, it seems that most of the jujube fruits in domestic market were largely produced through parthenocarpy.

Effects of Grape Fruit Stem Extracts Treatment on the Storage Property of Fresh Jujube (Zizyphus jujuba) (생대추의 저장성에 미치는 포도송이줄기 추출물 처리의 효과)

  • Woo, Koan Sik;Son, Sang Ik;Jeong, Heon-Sang;Lee, Junsoo;Lee, Hee-Bong
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.35 no.2
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    • pp.192-198
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    • 2006
  • Treatment effects of grape fruit stem extracts (GFSE) containing trans-resveratrol on the storage property of fresh jujube (Zizyphus jujube) were investigated. Fresh jujubes were packed in different storage containers [polyethylene terephthalate (PET) and polyethylene (PE)], and treated with GFSE containing trans-resveratrol of 10, 30 and 50 ppm, respectively. The storage vessels filled with $N_2$ gas, and stored in refrigerator $(0{\pm}1^{\circ}C)$ during 18 weeks, and then quality characteristics during storage period were analysed. Ethylene gas increased until 8 weeks and decreased afterward. Decaying of jujube started at $6\~8$ weeks in control, but it did at 14 week storage for the fruits at $50\%$ maturity treated with 10 ppm of GFSE and packed in PE vessel. Soluble solid (Brix degree) and total acidity of fresh jujube slightly increased in all the treatments during storage period. Hardness slightly increased until 4 weeks and decreased afterward. Vitamin C content was at the highest content of $86.8\~273.4$ mg/100g for most of treatments at 2 weeks and decreased afterward. Storage stability was higher for $50\%$ maturity fruits than for the $70\%$ maturity, and higher for PE vessels than PET containers. Storage period of fresh jujube in this experiment ranges in $10\~12$ weeks for $50\%$ maturity fruits treated with 10 ppm of GFSE and packed in PE vessel.

Effects on Storage Property of Fresh Jujube Treated with Grape Fruit Stem Extracts (GFSE) and Fermented Pollen (FP) (포도줄기추출물 및 발효화분 처리가 생대추의 저장기간에 미치는 영향)

  • Woo, Koan-Sik;Hwang, In-Guk;Jang, Keum-Il;Kang, Tae-Su;Lee, Hee-Bong;Jeong, Heon-Sang
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.37 no.8
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    • pp.1090-1094
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    • 2008
  • Treatment effects of grape fruit stem extracts (GFSE) containing trans-resveratrol or fermented pollen (FP), and ethylene gas scavenging material (EGS) on the storage property of fresh jujube (Z izyphus jujuba forma hoonensis C.S. Yook) were investigated. Fresh jujubes were packed in different storage containers (PE film and Lock & Lock vessel), and treated with GFSE containing trans-resveratrol of 30 ppm or 1% FP, and EGS. The storage vessels were stored in refrigerator ($0{\pm}1^{\circ}C$) during 12 weeks, and then quality characteristics during storage period were analysed. Hardness slightly increased until 4 weeks and decreased afterward. Soluble solid ($^{\circ}Bx$) and total titratable acidity of fresh jujube slightly increased in all treatments during storage period. Vitamin C content of fresh jujube slightly decreased in all treatments during storage period. Number of microorganisms decreased until 4 weeks and increased afterward. The decay enzyme activity increased in all treatments during storage period. Storage stability was higher for PE film than Lock & Lock containers. Storage period of fresh jujube in this experiment ranges in $8{\sim}9$ weeks for maturity fruits treated with 30 ppm of GFSE and ethylene gas scavenging material.

Antioxidant and Alcohol Dehydrogenase Activity of Water Extracts From Abalone Containing Medicinal Plants (전복과 천연 식물류 복합물의 항산화 및 알코올대사 효소 활성)

  • Shin, Jung-Hye;Lee, Soo-Jung;Choi, Duk-Ju;Kang, Min-Jung;Sung, Nak-Ju
    • Korean journal of food and cookery science
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    • v.24 no.2
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    • pp.182-187
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    • 2008
  • This study was performed to evaluate the possible production of a functional beverage derived from abalone and with several plants (AP). Five types of AP composites were prepared having different medicinal plant compositions (AP- I : abalone, garlic, jujube, Chinese matrimony fruit, dried orange peel, licorice root, zinger, honey; AP- II: abalone, garlic, black bean, Chinese matrimony fruit, cornus fruit, licorice root, zinger, honey; AP-III : abalone, jujube, arrow root, milk vetch, dried orange peel, licorice root, zinger, honey; AP-N: abalone, black bean, arrow root, milk vetch, cornus fruit, liquorice root, zinger, honey; AP-V : abalone, garlic, Chinese matrimony fruit, milk vetch, licorice root, zinger, honey). In vitro analysis were performed to examine the antioxidant contents and alcohol dehydrogenase activities of the composites. AP- II had the highest total phenol contents ($28.55{\pm}1.56\;mg/l00\;g$), and AP- V the highest level of flavonoids ($47.61{\pm}1.58\;mg/l00\;g$). At $78.89{\pm}0.16%$, AP- V displayed the strongest electron donating ability followed by AP-II($57.99{\pm}0.21%$) and API ($37.66{\pm}0.20%$). Reducing power was also significantly higher in AP- V. The Hydroxyl radical scavenging and SOD-like activities of all composites were less than 15% and 20%, respectively. At 12.5% alcohol concentration, ADH activity ranged from $114.47{\pm}2.18{\sim}121.39{\pm}4.36%$ and ALDH activity ranged from $100.04{\pm}2.90{\sim}129.54{\pm}4.80%$; AP- I , AP- II, and AP- Vin 12.5% of alcoholic concentration. The composites of AP- I , AP- II, and AP- V, all containing garlic and Chinese matrimony fruit, were significantly stronger than AP-III and AP-N. Finally, also at 12.5% alcoholic concentration, the ALDH activity of AP- V was higher than its ADH activity.

Seasonal Occurrence of Three Pest Moths in Jujube Orchards in Boeun, Korea (보은지역 대추과원 나방류 해충 3종의 발생 소장)

  • Lee, Seongkyun;Kim, Chungwoo;Lee, Kyeong Hee;Lee, Jong Won;Oh, Ha Kyung;Han, Jongwoo;Kim, Sang Hee;Kim, Youngho
    • Korean journal of applied entomology
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    • v.56 no.3
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    • pp.261-265
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    • 2017
  • Currently, clearwing moths and peach fruit moths are considered economically important pests of jujube in Boeun, Chungbuk, Korea. However, until now, specific studies on occurrence of the major pests of jujube in Boeun area, which could be useful for pest control, have not been carried out. In this study, seasonal occurrence of three pest moths (Synanthedon bicingulata, S. haitangvora, and Carposina sasakii) in jujube orchards was monitored using sex pheromone traps. Synanthedon bicingulata and S. haitangvora were monitored from 2013 to 2015. Adults of both species were captured from May to October, with two peaks in their occurrence: mid-June and mid-September for S. bicingulata, and mid- to late-June and mid- to late-September for S. haitangvora. However, S. haitangvora occurred in lower numbers than S. bicingulata. Adults of C. sasakii were captured from 2014 to 2016. From May to October, two peaks were observed in their occurrence in mid-June and in late-August to mid-September and the second peak was lower than the first. Thus, the life histories of these pest moths of jujube should be studied in detail for an effective pest control.

Screening of Chinese Herbal Medicines with Inhibitory Effect on Aldose Reductase (V) (중국 약용식물 추출물의 알도즈 환원 효소 억제 효능 검색 (V))

  • Lee, Yun-Mi;Kim, Young-Sook;Kim, Joo-Hwan;Kim, Jin-Sook
    • Korean Journal of Pharmacognosy
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    • v.42 no.2
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    • pp.187-194
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    • 2011
  • Aldose reductase (AR), the key enzyme in the polyol pathway, plays an important role in the development of the diabetic complications. None of Aldose reductase Inhibitor (ARI) has achieved worldwide use because of limited efficacy or undesirable side effects. Therefore, evaluating natural sources for ARI potential may lead to the development of safer and more effective agents against diabetic complications. Fifty two Chinese herbal medicines have been investigated for inhibitory activities on AR. Among them, twelve herbal medicines, Artemisia anomala (aerial part), Centella asiatica (aerial part), Scutellaria baicalensis (root), Senecio chrysanthermoides (whole plant), Gleditsia japonica (twig), Zizyphus jujube (twig, leaf), Citrus aurantium (fruit), Hydnocarpus anthelmintica (fruit), Potaninia mongolica (aerial part), Tribulus terrestris (fruit), Artemisia apiacea (aerial part) and Eclipta prostrate (aerial part) exhibited a significant inhibitory activity against AR. Particularly, Artemisia anomala, Centella asiatica and Scutellaria baicalensis showed four times more potent inhibitory activity than the positive control, 3,3-tetramethyleneglutaric acid (TMG).