• Journal of Biosystems Engineering
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• 제34권3호
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• pp.161-166
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• 2009

This study was conducted to investigate the growth characteristics of cherry tomatoes in greenhouse using far infrared heating system. The far infrared greenhouse heating systems were installed in two ways on the greenhouse side wall and at the greenhouse ceiling. The heating characteristics of far infrared heating system were analyzed by investigating the heating load, internal temperature, energy consumption, growth characteristics and quality evaluation. The results were compared with heated air heating system using kerosene. The results showed that tomatoes grown in the greenhouse with the far infrared heating system had relatively better plant height, leaf length, leaf width, stem diameter than ones from the greenhouse with hot air heating system and both heating methods had no significant difference on Cherry tomato sugar contents. At the same time, the far infrared heating system reduced heating cost from 34.5 to 41.4% on comparing with hot air heating system.

• 원예과학기술지
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• 제34권2호
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• pp.228-235
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• 2016

본 실험은 딸기 재배 후 휴작기에 후작물로 방울토마토 '루비'의 정식시기에 따른 생산성을 결정하기 위하여 수행하였다. 방울토마토는 딸기 전용상토로 충진된 2단 고설 벤치에 2015년 4월 20일, 4월 30일 그리고 5월 10일에 정식되었다. 과일의 수확 조사는 7월 31일까지 이루어졌다. 양액농도는 정식초기에 EC $1.2dS{\cdot}m^{-1}$로 시작하여 점진적으로 농도를 높여 1화방 개화 후에는 EC $2.5dS{\cdot}m^{-1}$로 공급하였다. 네덜란드의 PBG 양액을 이용하여 공급주기를 하루에 1분 6회로 공급하였다. 정식시기에 따른 방울토마토의 식물체 길이생장은 상단에 비하여 하단에 정식한 것이 유의하게 컸었으며, 일찍 정식한 것이 늦게 정식한 식물체 보다 길이생장이 컸다. 과일의 생산량은 4월 20일 하단베드에 정식한 방울토마토의 식물체당 평균 수확량이 2,954g으로 가장 높았다. 정식 시기나 베드 위치에 따른 과일의 평균무게나 과일의 당도에는 유의한 차이가 없었다. 방울토마토의 총 생산량은 4월 20일에 정식한 것이 4월 30일과 5월 10일에 정식한 방울토마토에 비하여 각각 18%와 34%로 높았다. 우리는 방울 토마토를 일찍 정식하였을 때, 생산량이 증가되는 것을 확인하였다. 이 결과는 농민들에게 2단 베드에서 딸기 후작물로 방울토마토의 재배 기간을 선택하는데 도움을 줄 것으로 판단된다.

• 한국조리학회지
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• 제20권6호
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• pp.200-210
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• 2014

본 연구에서는 방울토마토를 이용하여 다양한 온도와 저장기간(0, 7, 그리고 14일) 및 포장재의 기체조성을 달리하여 품질 변화 및 대장균, 곰팡이 그리고 효모와 같은 미생물의 오염도에 관해 분석하였다. 본 연구는 $5^{\circ}C$, $10^{\circ}C$ 그리고 $15^{\circ}C$의 상태에서 0일 7일 그리고 14일간 저장하여 pH, 색도 변화 및 미생물의 성장패턴을 확인하였다. 방울토마토의 pH의 변화에서는 기간에 따른 증가를 확인하였지만, 큰 차이는 보이지 않았다. 또한, 색도를 측정하였을 때도 기체조성과 온도에 독립적으로 밝기와 적색도 그리고 황색도에서 불규칙한 결과를 확인하였다. 미생물은 총균수, 대장균군수, 곰팡이 및 효모를 측정하였다. 혼합가스로 $5^{\circ}C$, $10^{\circ}C$ 그리고 $15^{\circ}C$의 상태에서 저장한 방울토마토의 미생물도 불규칙적인 생장패턴을 확인하였다. 그러나 산소함량에 비해 이산화탄소 함량이 많은 포장재에서 평균적으로 균의 생장 속도를 늦출 수 있는 것을 확인하였다. 따라서 본 연구는 저장이 우수한 최적의 기체조성 및 온도 등의 확립을 위한 기초자료로 제공할 수 있을 것으로 사료된다.

• 한국조리학회지
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• 제23권7호
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• pp.42-49
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• 2017

This study was conducted to determine the nutritional value of domestic cherry tomato varieties (Summerking, Qutiquti, and Minichal). The levels of amino acids, amino acid derivatives, and ${\gamma}-aminobutyric-acid$ (GABA) were analyzed using ion chromatography. In domestic cherry tomatoes, eighteen free amino acids were found including L-glutamic acid (L-Glu), L-glutamine (L-Gln), and L-aspartic acid (L-Asp). L-Glu was the most abundant amino acid, ranging from 1,533.17 mg/100 g to 1,920.65 mg/100 g (dry weight). The next abundant amino acids were L-Gln, ranging from 784.68 mg/100 g to 1,164.36 mg/100 g and L-Asp, ranging from 320.73 mg/100 g to 387.22 mg/100 g. Domestic cherry tomatoes contained eight essential amino acids except tryptophan and the total essential amino acid content was 297.30~432.43 mg/100 g (dry weight), which was 8.92~10.61% of total free amino acid. Several amino acid derivatives were found: L-carnitine (L-Car), hydroxylysine (Hyl), o-phosphoethanolamine (o-Pea), phosphoserine (p-Ser), ${\beta}-alanine$ (${\beta}-Ala$), N-methyl-histidine (Me-His), ethanolamine ($EtNH_2$), and L-citrulline (L-Cit). L-Car, transporting long-chain fatty acid into mitocondrial matrix, was the most abundant amino acid derivative in all domestic cherry tomatoes. A high level of GABA (313.18~638.57 mg/100 g), known as a neurotransmitter, was also found in all three domestic cherry tomatoes. These results revealed that domestic cherry tomatoes have a good balance of nutrient and bioactive compounds. Therefore, cherry tomatoes can be used as a functional food material.

• 한국식품영양과학회지
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• 제26권5호
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• pp.866-871
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• 1997

This study was carried out to determine the effect of osmotic dehydration as pretreatment on the qualities of dried cherry-tomatoes. The weight reduction and solid gain in osmosed cherry-tomato were increased by increasing sugar concentration, immersion temperature and time; among three parameters, the immersion temperature affected more than sugar concentration and immersion time did. The moisture content was decreased as increasing sugar concentration, immersion temperature and time, and it was the lowest at the osmotic conditions of 7$0^{\circ}C$, 60$^{\circ}$Brix and 11hr. To determine the optimum processing condition by RSm, the polynomial optimum models were established. The regression models was significant (p<0.05). It was used contour plots to optimize osmotic dehydration. The optimum condition for osmotic dehydration as pretreatments for drying of cherry-tomatoes were immersion temperature of 47~53$^{\circ}C$, sugar concentration of 39~43$^{\circ}$Brix, and immersion time of 7hr, in which process conditions were 78~86% moisture content, 8.5~10$^{\circ}$Brix sugar content and 80~86% weight reduction.

• 원예과학기술지
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• 제35권3호
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• pp.300-313
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• 2017

'Unicon' cherry tomato (Solanum lycopersicum) is one of the most highly perishable horticultural crops due to its high water content and respiration rate. This study was carried out to assess the effect of continuous application of $CO_2$ (control [air], 3%, and 5%) on the quality and shelf life of cherry tomato fruits stored at $10^{\circ}C$ and $85{\pm}5%$ relative humidity (RH) at two maturity stages (pink and red). Continuous application of $CO_2$ did not affect the soluble solids content (SSC) or titratable acidity (TA) of the fruit at either maturity stage during storage. However, there was a significant difference among treatments in terms of flesh firmness, cell wall thickness, pectin content, vitamin C content, skin color, lycopene content, weight loss, ethylene production rate, respiration rate, and acetaldehyde and ethanol production. Fruits treated with 5% $CO_2$ maintained their high quality with regards to vitamin C, skin color ($a^*$), lycopene content, weight loss, physiological parameters (ethylene production rate, respiration rate, and volatile compounds), flesh firmness, cell wall thickness, and pectin content at both maturity stages compared with 3% $CO_2$ treatment and the control. Continuous application of $CO_2$ (5%) reduced the ethylene production rate and the production of volatile compounds during storage. Therefore, cherry tomato 'Unicon' fruit can be stored for two weeks without losing fruit quality at both maturity stages under continuous application of 5% $CO_2$ as a postharvest treatment.

• Mycobiology
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• 제29권3호
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• pp.176-178
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• 2001

A soft rot of fruits caused by Rhizopus stolonifer occurred on cherry tomato in Jinju City Agricultural Products Wholesale Market, Korea. The disease infection usually started from wounding after cracking of fruits. At first, the lesions started with water soaked and were rapidly softened and diseased lesion gradually expanded. The mycelia grew vigorously on the surface of fruits and formed stolons. Colonies on potato dextrose agar at $25^{\circ}C$ were white cottony at first, becoming heavily speckled by the presence of sporangia and the browinish black, and spreading rapidly by means of stolons fired at various points to the substrate by rhizoids. Sporangia were $82.7{\times}196.7{\mu}m$ in size and globose or sub-globose with somewhat flattened base. The color of sporangia was white at first and then turned black with many spores, and never overhanging. Sporangiophores were $2.6{\sim}5.8{\times}12.3{\sim}24.2{\mu}m$ in width, smooth-walled, non-septate, tight brown, simple, long, arising in groups of $3{\sim}5$ from stolons opposite rhizoids. Sporangiospores were $8.2{\sim}18.8{\mu}m$ long, irregular, round, oval, elongate, angular, and browinish-black streaked. Columella was $64.1{\times}136.3{\mu}m$. brownish gray, and umberella-shaped when dehisced. The causal organism was identified to be R. stolonifer. This is the first report of Rhizopus soft rot on cherry tomato caused by R. stolonifer in Korea.

• 한국환경농학회지
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• 제41권4호
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• pp.245-251
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• 2022

BACKGROUND: Selection an suitable light source is essential in the year-round production of horticultural crops in closed production systems such as plant factory with controlled environments. This study was investigated to confirm the effects of artificial light sources on growth of cherry tomato'CF Jelly'(Lycopersicon esculentum var.) under high-pressure sodium lamps (HPS), metal-halide lamps (MH), and LEDs. METHODS AND RESULTS: Light intensity of the light sources was controlled at 220±30 µmol/m²/s with 12 hrs of photoperiod for a day. Flower development was significantly faster in HPS and MH treatments compared to the LEDs. There was no significant difference between the leaf number and leaf shape under the HPS and MH treatments. Reproductive growth of cherry tomato was significantly promoted by the LEDs treatment of blue plus red lights. Fruit yield per plant also increased under the LEDs compared to the others. CONCLUSION(S): Growth, flowering, and fruit setting of the cherry tomato were accomplished by the artificial lights under plant factory conditions. The HPS treatment showed negative effect on fruit quality in terms of blossom-end rot incidence compared to the LEDs or MH treatment. Effect of the LEDs on promotion of fruit weight and yield was also proved. Additional research should be carried out for improving sugar metabolism or decreasing disease in the fruits under plant factory system using only artificial lights.

• 한국조리학회지
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• 제20권6호
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• pp.115-127
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• 2014

본 연구에서는 방울토마토 라이코펜 품종의 기능성 식품 또는 식품 소재로서의 효용성을 알아보기 위하여 총 폴리페놀 및 플라보노이드 함량, 항산화 활성, 암세포 생육억제 효과를 검증하여 보았다. 방울토마토 라이코펜 품종의 폴리페놀 함량은 건조물 1 g당 $12.28{\pm}1.78mg$으로 국내산 일반 토마토와 유사하였으며, 플라보노이드는 건조물 1 g당 $3.89{\pm}0.54mg$이 함유되어 있어, 일반 토마토에 비해 4~6배 가량 높았다. 방울토마토 라이코펜 품종의 항산화 활성을 알아보기 위해 DPPH radical scavenging activity(DSA), ABTS radical scavenging activity(ASA) 및 Ferric reducing antioxidant power(FRAP)를 측정하였다. DSA와 ASA를 측정한 결과, 추출물의 농도가 증가함에 따라 유의적으로 라디칼 소거 활성이 증가하였으며, $IC_{50}$은 각각 $328.64{\pm}4.190{\mu}g/mL$, $350.61{\pm}3.30{\mu}g/mL$이었다. 또한, FRAP값은 $26.92{\pm}0.68{\mu}mol$ $Fe^{2+}/g$으로 밝혀져 방울토마토 라이코펜 품종은 항산화 활성이 있음이 확인되었다. 방울토마토 라이코펜 품종의 세포독성과 암세포 생육억제 효과를 검증한 결과, 폐암세포(A549)에 대해 강한 생육 억제 효과를 확인할 수 있었다. 방울토마토 라이코펜 추출물은 처리 농도가 증가함에 따라 유의적으로 A549 세포의 생육을 억제하였다. 추출물을 $500{\mu}g/mL$ 농도로 처리하였을 경우, 67.39%의 암세포 억제 효과를 보였으며, $IC_{50}$은 $375.46{\pm}33.67{\mu}g/mL$이었다. 또한, 방울토마토 라이코펜 추출물은 자궁경부암세포(HeLa)와 간암세포(HepG2)에 대해서도 약한 생육억제 효과를 보임을 확인할 수 있었다. 이상의 결과를 통해 방울토마토 라이코펜 품종은 기능성 식품 또는 식품 소재로서의 가치가 매우 높음이 확인되었다.

• 농업과학연구
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• 제46권4호
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• pp.931-939
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• 2019

Biochar is a solid carbon material made by pyrolyzing a biomass under limited oxygen conditions. Biochar has been reported to confer various benefits, such as increased soil productivity, pollutant absorption, and reduced greenhouse gas. In this study, oak pyrolyzed at 600℃ for 3 hours was either powdered or pelleted. Each of the biochar types was added to the soil at a rate of 2%. The control did not receive any biochar while a combination of the biochar and NPK treatment (biochar 2% + NPK) was also included. The cherry tomatoes were grown in greenhouse pots for 50 days to compare the growth characteristics of the different treatments. The cherry tomato with the powdered biochar 2% + NPK treatment had the heaviest plant fresh shoot weight of 276.4 g and the highest chlorophyll content of 59.3 SPAD. The control had the lightest plant fresh shoot weight of 44.2 g and a chlorophyll content of 26.5 SPAD. Both forms of biochar affected the chemical properties of the soil, increased the pH, electrical conductivity, available phosphate, total carbon and total nitrogen and positively influenced the cherry tomato growth and productivity. From the above results, therefore, both biochar forms are suited for use as soil amendments.