• Applied Biological Chemistry
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• 제42권2호
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• pp.147-151
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• 1999

제주지역에서 생산되는 대표적인 감귤품종인 흥진조생 온주밀감의 품질에 관여하는 물리화학적인 특성을 조사하기 위하여 감귤원의 고도별 및 생산지역별로 12월 초순에 감귤을 수확하여 분석하였다. 가용성고형물의 함량은 해안 지역(해발 100 m 이하)에서 $9.06{\sim}12.98$였으며, 중산간 지역(해발 150 m 이상)에서는 $10.16{\sim}12.26$으로서 일반적으로 고도가 낮은 지역에서 생산된 감귤이 당도가 높았으며 지역간에도 차이가 있음을 알수 있었다. 산 함량은 한경면을 제외하고는 해안 지역에서는 $0.83{\sim}1.21%$였으며, 중산간 지역에서는 $0.94{\sim}1.34%$를 보여 일반적으로 중산간 지역에서 생산된 감귤이 해안 지역에 비하여 산 함량이 높음을 알 수 있었다. 해안 지역에서 생산된 감귤의 과육율은 $77.32{\sim}81.27%$이었고, 중산간 지역은 $75.00{\sim}81.55%$를 보여 재배지역 사이에 차이를 보였다. 수확시기가 늦어짐에 따라 해안 지역과 중산간 지역에서 각각 당도의 변화량은 0.91과 0.82였고, 산 함량의 변화량은 0.15%와 0.13%의 차이를 나타내었다. 이에 따라 당산비의 증가가 각각 1.85와 1.39를 나타내어 수확 시기가 늦어짐에 따라 품질이 향상됨을 알 수 있었다. 겉보기에 의한 관능평가에서는 감귤원의 고도에 따른 차이는 나타나지 않았으나 고도가 낮은 감귤 주산지에서 생산된 감귤이 높은 점수를 나타내었다. 또한, 감귤 주산지인 서귀포시 지역에서 수확한 온주밀감이 다른 지역보다는 품질이 우수함을 알 수 있었다.

• 현장농수산연구지
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• 제11권1호
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• pp.173-179
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• 2009

부식용 채소로 이용되는 호박의 과실 품질을 손쉽게 측정할 수 있는 방법을 제시하고자 실험한 결과는 다음과 같다. 1. 호박의 식미와 가장 관련이 갚은 성분 중 하나가 총고형물의 양으로, '풋호박'과 '서울마디호박'의 과실내 총고형물이 각각 6.4 및 7.5%이었고 'Ford Zucchini'와 시판 '쥬키니' 품종은 각각 4.7 및 4.3%로 나타나 관능검사로 조사한 식미의 선호도 정도와 거의 일치하였다. 2. 분리세대에서 초장과 과실 품질 관련형질과의 상관관계가 없음을 알 수 있어, 초장이 짧은 우수 계통을 육성하는 것이 어렵지 않음을 알 수 있었다. 3. 호박 과실을 건조시킨 후 무게를 측정하는 간이측정법으로 식미 품질을 파악할 수 있어, 호박을 재배하면서 손쉽게 품질을 평가할 수 있는 방법으로 활용될 것으로 생각된다.

• 한국식품저장유통학회지
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• 제11권2호
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• pp.135-141
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• 2004

토마토와 자두의 포장방법 및 저장 온도가 과실의 저장성에 미치는 영향을 분석하기 위하여 저장 중 중량감소율, pH 및 적정산도, 색도, 경도, anthocyanin 함량을 측정하였다. 중량감소율은 $25^{\circ}C$보다 4$^{\circ}C$ 저장 시험구에서 보다 적게 나타났으며 포장재 처리구가 대조구에 비해 중량감소율이 적게 나타났다. 저장 중 pH는 저장기간이 증가함에 따라 점차 증가하는 경향을 나타내었지만 포장방법에 따른 차이는 나타나지 않았다. 적정산도의 경우 저장온도와 포장방법에 상관없이 저장기간이 증가함에 따라 감소하는 경향을 나타내었다. 토마토 색도의 경우 포장방법에 따른 변화는 나타나지 않았지만 4$^{\circ}C$에서 색도의 변화가 거의 나타나지 않았고 $25^{\circ}C$에서 저장한 시험구에서는 점차 증가하는 것으로 나타났다. 자두의 경도는 저장기간이 증가할수록 감소하는 경향이 나타났으며 anthocyanin 함량은 $25^{\circ}C$에서 저장 시 급격한 변화가 관찰된 반면 4$^{\circ}C$에서는 그 변화 폭이 적었다. 미생물의 변화는 저장 중 모든 종류의 미생물의 수가 증가하였는데 저온저장 시 포장재처리가 상대적으로 증가율을 감소시켰다. 본 실험 결과 품질 유지에 가장 효율적인 포장재는 토마토의 경우 PVDC이며, 딸기의 경우 HDPE임을 알 수 있었다. 즉, 냉장유통 및 적절한 포장재 선택이 토마토와 자두 같은 신선 과채류의 품질유지 및 유통기한 증대에 중요한 요인으로 생각되었다.

• Journal of Forest and Environmental Science
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• 제35권2호
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• pp.69-77
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• 2019

Pterocarpus erinaceus is a multipurpose tree species indigenous to semi-arid and Guinean-savanna woodlands of Africa. Natural regeneration on the savanna is being hampered by higher fire frequencies and other land use changes. Simultaneously, demand for timber from the species on the international market is on the rise, raising conservation concerns. To ensure sustainability, good quality seeds, sources of which have not received much research focus, are needed for afforestation. This study investigated how seed quality, germinability and initial seedling growth of P. erinaceus might be influenced by land-use type, mother tree size as well as source and timing of fruit harvest, using both correlational and experimental approaches. The results showed that up to 94.6% of all harvested fruits contained seeds, with no differences found between fruits harvested from cultivated and non-cultivated lands. Percentage of (sound) unblemished seeds was found to be higher for fruits harvested early March (47.3%) than fruits from late April (39.5%). Percentage sound seeds was 41.4% for dispersed fruits (i.e. detached fruits picked from under mother trees) which was not found to differ from undispersed fruits (i.e. fruits harvested while still attached to mother trees) at 45.5%. Also, the influence of fruit harvest time was not found to be different for dispersed and undispersed fruits. Correlations between seed set (proportion of fruits containing seeds) and mother tree size (both tree height and DBH) were found to be very low and non-significant for both dispersed and undispersed fruits. Across mother trees, mean emergence percent was 79.7%, and mean seedling height at three weeks following emergence was 5.32 cm. Both emergence percentage and seedling height were not found to differ among mother trees, but seeds from dispersed fruits had a higher emergence percent (85%) than seeds from undispersed fruits (74%). Implications of findings are discussed.

• 한국식품저장유통학회지
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• 제2권2호
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• pp.251-257
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• 1995

In order to determine the quality of Citrus unshiu(medium cultivar of satsuma mandarin) produced in Cheju, citrus fruits sampled at sorting places and harvested directly on citrus tree in south and north area of Cheju were analyzed. The fruits were grown in size till early of November, and soluble solids were increased continuously after that. Compared with the quality of citrus fruits as a factor of soluble solids, firmness, total sugar, pH, and color index, the optimum harvest periods were supposed to be reasonable from early of December for C. unshiu Marc. var. yonezawa and C. unshiu Marc. var. hayashi, Fruit weights and peel thickness had a linear correlation with increasing fruit size, but soluble solids and acid contents had not a correlation. The selection of C. unshiu variety was needed to determine by the properties of storage.

• Journal of Plant Biotechnology
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• 제45권1호
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• pp.36-44
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• 2018

In this study, we evaluated the effect of different concentrations of chitosan and chitosan nanoparticles as edible coating in extending shelf life and maintaining the quality of banana fruits (Musa acuminata AAA group). The fruit treated with 1.15% chitosan, 1.25% chitosan and chitosan nanoparticles then store at ambient temperature ($25{\pm}1^{\circ}C$). The shelf-life of banana, starch content, weight loss, pulp to peel ratio, total soluble solid, surface morpholgy of banana peel and sensory evaluation were analysed. Molecular analysis on the effect of chitosan was also conducted. Results showed that the application of chitosan nanoparticles and chitosan could extend shelf-life and maintain quality of banana fruits.

• 원예과학기술지
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• 제33권2호
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• pp.196-201
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• 2015

Lysophosphatidylethanolamine (LPE) affects the quality of flowers, fruits, and other horticultural products. Studies have provided evidence that LPE can accelerate ripening of fruits and prolong shelf-life at the same time. In this study, the influence of LPE on anthocyanin accumulation and phytochemical characteristics of sweet cherry was investigated. LPE ($10mg{\cdot}L^{-1}$) was applied to a commercial sweet cherry c.v. '0900 Ziraat' orchard two and four weeks before harvest for two treatment years (2011 and 2012). Preharvest applications of LPE resulted in significant improvement in both pomological and phytochemical attributes at harvest. LPE treatment led to a 17% increase in fruit weight and a 6% increase in soluble solid content when averaged over two experimental years. Fruit phytochemical content and antioxidant capacity were increased significantly. The average total phenolic content of LPE-treated fruits for the two years was $703{\mu}g$ gallic acid equivalent (GAE)/g fresh weight (g FW) compared to $569{\mu}g$ GAE/g FW in the untreated control. Fruits treated with LPE had a 27% and 16% more anthocyanin than the control fruits in 2011 and 2012. Antioxidant capacity of fruits, as measured by TEAC (Trolox equivalent antioxidant capacity) assay, was 12.5 and $11.4{\mu}mol$ TE/g FW in LPE-treated and untreated control fruits, respectively, when averaged over two experimental years. Our results suggest that preharvest application of LPE may have the potential to increase anthocyanin accumulation, improve fruit quality and enhance phytochemical characteristics of sweet cherries.

• 한국자원식물학회:학술대회논문집
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• 한국자원식물학회 2020년도 춘계학술대회
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• pp.32-32
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• 2020

High-quality and high-phytonutrient watermelon fruits have strong market opportunities besides their health related benefits. Hence, investigating quality and nutritional related traits of watermelon genetic resources could provide important baseline data in breeding for increased lycopene content thereby increasing the marketability of watermelon. To this end, we have examined some fruit morphological traits and lycopene content of 105 genetic resources. The morphological characters were recorded on the field and inside laboratory and lycopene was measured using spectrophotometric and HPLC methods. Watermelon fruits have shown a diverse morphological characters. Red and pink fleshed fruits dominated in the entire collections. Fruits with higher thickness of rind were found to exhibit less soluble solid content (SSC). Korean origin fruits were characterized by intermediate SSC while USA, RUS, TJK, TKM, TWN, and URY originated fruits had the highest SSC. The lycopene content varied between 41.37 and 182.82 ㎍/g, 2.81 and 163.72 ㎍/g, and 3.54 and 255.47 ㎍/g using HPLC, UV-Vis, and microplate reader instrumnets, respectively. Red- and pink-fleshed fruits had the highest levels of lycopene content compared to the yellow- and orange-fleshed. Lycopene content had a significant positive correlation with SSC, however, no correlations were detected between lycopene and other quantitative fruit morphological characters.

• 한국식품과학회지
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• 제34권5호
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• pp.919-923
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• 2002

'Manita', a red pepper cultivar, and 'HL', a cultivar bred for single-harvest by National Horticultural Research Institute, were cultivated using direct sowing method, and all fruits were harvested five times at on interval of one week, and were grouped into five grades by color and appearance (drying degree). The amount of red fruits increased gradually with increasing harvest time, and at the fifth harvest time, the ratios of red fruits were 80.9 and 79.1% for Manita and HL, respectively. Among red fruits, the portion of ROO grade (red pepper dried considerably on the plant) was 42.9%, RO (red pepper dried partially on the plant) 31.9%, and RF (fresh red pepper) 6.1% for Manita. For HL, the portions of RO and RF were 56.7 and 22.4%, respectively. As fruits aged, the redness intensified. ROO, RO, and RF fruits had ASTA color values of 150.4, 140.1, and 107.4 for Manita, and for HL, those of RO and RF were 100.0 and 77.1, respectively. The contents of capsaicinoids, organic acid, and sugar were not significantly different with the harvest time.

• 한국식품과학회지
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• 제34권1호
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• pp.128-131
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• 2002

'Manita', a red pepper cultivar being cultivated currently and 'HL', a cultivar bred for single-harvest by National Horticultural Research Institute were grown by direct sowing and raising seedling methods, respectively, and all the fruits on the tree were harvested once. Fruits were grouped into 6 grades by color and appearance and their chemical compositions were analyzed. Generally, 'HL' showed less redness and contained less amounts of capsaicin, organic acid, Vit. C, and sugar than 'Manita'. Regardless of cultivar and cultivation method, red-old fruits, ripened and partially dried on the plant, had more red color (21-30%) and more capsaicin (40.0-78.3 mg% vs. 33.2-52.7 mg%), but less sugar (12.70-16.69% vs. 14.46-17.43%) than red-fresh fruits. No difference was found between direct sowing and raising seedling.