• 한국식품영양학회지
• /
• 제6권1호
• /
• pp.31-36
• /
• 1993

Strawberry pulp was separated into serum and insoluble pulp by centrifugation and the serum was concentrated in vacuo to five folds at 55~58$^{\circ}C$ and 30~60mmHg. Concentrated strawberry pulp was prepared by mixing of concentrated serum and insoluble pulp. To evaluate the quality changes of straw-berry pulp, color, physicochemical and sensory properties were analyzed after concentration and during 18 weeks storage at -18'2. The results obtained from the study were as follows : during 18 weeks storage at - l8$^{\circ}C$, soluble solid, browning, reducing sugar content were increased and total anthocyanin, vitamin C, apparent viscosity were decreased. The result of sensory evaluation indicated that texture of concentrated pulp was inferior to that of control but flavor, color intensity and overall acceptance were not different from each other.

• 한국환경과학회지
• /
• 제27권3호
• /
• pp.195-202
• /
• 2018

The present study was carried out to investigate the effects of spermine treatment on the growth, yield and quality in strawberry under low-temperature condition, and thereby develop a chemical method to minimize damages by low temperature in greenhouse cultivation. Spermine treatment significantly improved the growth of strawberry in terms of leaf number, leaf area, leaf length, leaf diameter, plant height and plant weight. The highest effect was observed in the 250 uM spermine treatment and the effect tended to be maintained during the entire growth period of 90 days. Fresh weight and dry weight were significantly different depending on the concentrations of spermine. Strawberry plants treated with 250 uM spermine showed higher fresh weight and dry weight compared to untreated control plants during the growth period. Fruit weight, fruit length and fruit diameter were relatively higher when treated with $100{\mu}M$ spermine compared to other treatments. The fruit yield was the highest with 14 fruits per plant at $250{\mu}M$ spermine treatment and the coloration of the fruit was the best at this treatment with the Hunter a and b values of 46.56 and 28.75, respectively. The hardness of strawberry fruit tended to increase higher than 2N at $250{\mu}M$ and $500{\mu}M$ 250 uM spermine treatment. The sugar content of strawberries treated with $250{\mu}M$ spermine was $9.5^{\circ}$ Bx which was $1.6^{\circ}$ Bx higher compared to that in untreated control. However, spermine treatment did not affect the acidity of fruit and it remained 0.68-0.76% regardless of treatment concentrations. These results suggest that spermine treatment has a positive effect on the growth and productivity of strawberry fruit under abnormal low-temperature condition. The positive effect was the highest at $250{\mu}M$ spermine treatment and gradually decreased in the order of $100{\mu}M$, $500{\mu}M$, and untreated control.

• 한국정보처리학회:학술대회논문집
• /
• 한국정보처리학회 2019년도 추계학술발표대회
• /
• pp.581-584
• /
• 2019

Food consumption is growing worldwide every year owing to a growing population. Hence, the increasing population needs the production of sufficient and good quality food products. Strawberry is one of the world's most famous fruit. To obtain the highest strawberry output, we worked with three strawberry varieties supplied with three kinds of nutrient water in a greenhouse and with the outcome of the strawberry production, the highest yielding strawberry variety is detected. This Study uses the nutrient water consumed every day by the highest yielding strawberry variety. The atmospheric temperature, humidity and CO2 levels within the greenhouse are identified and used for the prediction, since the water consumption by any plant depends primarily on weather conditions. Machine learning techniques show successful outcomes in a multitude of issues including time series and regression issues. In this study, daily nutrient water consumption of strawberry plants is predicted using machine learning algorithms is proposed. Four Machine learning algorithms are used such as Linear Regression (LR), K nearest neighbour (KNN), Support Vector Machine with Radial Kernel (SVM) and Gradient Boosting Machine (GBM). Gradient Boosting System produces the best results.

• 한국환경농학회지
• /
• 제41권4호
• /
• pp.282-287
• /
• 2022

BACKGROUND: Green algae (Chlorella spp.) has been widely used as a biofertilizer to improve the crop yield and quality. However, available information is not enough to verify the mechanism of green algae's beneficial impact on strawberry. This study was conducted to investigate the effect of Chlorella fusca CHK005 application on the growth and nutrient status of strawberry plant and fruit characteristics. METHODS AND RESULTS: A total of 800 seedlings of strawberry variety 'Kuemsil' were planted. Once a week, C. fusca culture solution (1.0 × 10⁷ cells mL^-1) was applied into soil via irrigation in four different concentrations: no application (control), 1/1000 times (× 0.5), 1/500 times (× 1), and 1/250 times (× 2). Result showed that growth of strawberry plant was enhanced by Chlorella application and the highest impact on fresh weight (FW) and chlorophyll content of the plants were observed in × 2 treatment, followed by × 1, × 0.5, and control treatments. The phosphorus (P) concentration in the plant was significantly higher in × 1 and × 2 treatments compared to control. In case of fruit quality, sugar content (°Brix), hardness, and FW were lowest in control, but these values increased as application levels of Chlorella were higher. Also, P and K contents in the fruits increased with increasing the application levels and significant correlation between P content and oBrix in the fruits was found. CONCLUSION(S): Overall, Chlorella application seemed to improve plant growth and fruit quality by increasing the utilization efficiency of P and K in strawberries.

• 한국환경과학회지
• /
• 제26권1호
• /
• pp.87-96
• /
• 2017

In the present study, we investigated the effects of artificial removal of corolla and calyx lobes from open flowers on fruit development and fruit quality of strawberry (Fragaria ${\times}$ ananassa Duch.). Removing the corolla had no significant effect on fruit weight, hardness, length, and diameter, Hunter L, a, b values, sugar content and acidity. However, removing the calyx lobes significantly inhibited longitudinal and transverse growth of the fruits, resulting in diminished fruit size. In addition, merchantable fruit quality significantly decreased upon removing the calyx lobes, and this tendency was increased as more calyx lobes were removed. Nonetheless, removal of the calyx lobes had no effects on fruit color, sugar content, or acidity, similar to the effect of corolla removal.

• 한국농공학회논문집
• /
• 제63권5호
• /
• pp.73-81
• /
• 2021

The objective of this study was to analyze the waste nutrient generation loads from hydroponics for three major crops in Gyeongsangnam-do. Study hydroponic farms were selected for the three major crops such as paprika, strawberry, tomato based on the agricultural statistics data and field investigation. The flow amount and water quality for inflow and outflow of study hydroponic farms were monitored and analyzed on a monthly basis. Monitored samples were analyzed in terms of DO, BOD, T-N, T-P, SS, and EC. The generated load of BOD, T-N, and T-P were calculated from the monitored flow and water quality. The monitoring results showed that the drainage ratio for the circular hydroponic farm was lower than the non-circular hydroponic farm because the outflow from the circular hydroponics were much lower than that from the non-circular. The generated load calculation results showed that the BOD tended to have a smaller value than the TMDLs guideline for land, while T-N and T-P showed higher value than that from the TMDLs guideline. In order to effectively manage the pollutant load discharged from the hydroponics farming complex, it is necessary to manage the non-circulating hydroponics farm. To improve water quality, it is necessary to gradually expand the circulating hydroponics farm through policy and economic support.

• 한국식품조리과학회지
• /
• 제17권4호
• /
• pp.316-322
• /
• 2001

본 연구에서는 보교조생 딸기의 최적조건의 배합 비(딸기 중량의 설탕 50%와 프락토올리고당 50%)에 딸기 중량의 10, 20, 30, 40%를 양파로 대체하여 제조한 딸기잼의 수분, pH, 색도, 총산도, 퍼짐성, 가용성 고형물 함량, 환원당 함량, 안토시아닌 잔존율 및 관능검사를 실시하여 그 품질 특성을 비교 검토하였다. 수분함량, 환원당 함량, 총산도, 펙틴 및 안토시아닌 함량은 딸기가 양파보다 높았고, pH와 가용성 고형물 함량은 양파가 딸기보다 높았다. 대조군 잼에 비해 양파의 첨가량이 많아질수록 수분함량과 총산도는 점차 감소하는 경향을 나타내었고, pH는 점차 증가하였다. 색도는 L값은 양파의 첨가량이 많아질수록 감소하는 경향을 나타내었고, a값은 대조군에 비해 양파를 첨가한 시료가 다소 낮은 값을 나타내었으며, b값은 대조군에 비해 양파를 첨가한 시료가 다소 높은 값을 나타내었다. 대조군 잼에 비해 양파의 첨가량이 많아질수록 가열시간은 길어졌고, 퍼짐성, 가용성고형물 함량, 환원당 함량 및 안토시아닌 잔존율은 점차 감소하는 경향을 나타내었다. 관능검사 결과는 색, 끈기, 광택, 단맛, 신맛, 향, 종합적인 기호도의 모든 항목에서 대조군보다 양파 첨가량이 많아질수록 관능검사 점수가 감소하였다. 한편 잼을 빵에 발라서 관능검사를 실시한 결과 모든 항목에서 대조군보다 양파 첨가량이 많아질수록 관능검사 점수가 감소하였다. 잼만으로 관능검사를 실시했을 때와는 다르게 단맛에서만 다소 점수가 감소하였고, 나머지 모든 항목에서 점수가 증가하였다. 본 실험에서 제시한 시료 배합비율 중에서는 대조군 시료가 모든 관능적인 면에서 가장 좋게 평가되어 기존의 딸기잼에 길들여진 기호도를 바꿀 수는 없었으나, 양파를 딸기 중량의 10%, 20% 첨가했을 때는 관능검사 점수가 다소 떨어지기는 하였지만, 양파 특유의 맛과 향을 지니면서도 상당히 우수한 관능적 품질을 나타내었다. 따라서 다양한 소비자의 기호를 충족시킬 수 있는 기능성이 우수한 잼을 제조하는데 양파를 첨가할 수 있는 새로운 가능성을 제시할 수 있을 것으로 생각된다.

• 한국식품저장유통학회지
• /
• 제13권3호
• /
• pp.316-321
• /
• 2006

전해 방식에 따라 제조된 전기분해수로 세정처리한 딸기의 살균효과 및 저장중 품질변화를 살펴본 결과, 전기분해수에 의한 딸기의 미생물학적 살균효과는 침지수량은 중량 대비 10배수, 침지시간은 20분 처리시 초기균수에 대하여 2 log cycle 정도 감소하며 저장중 균증식 속도도 다소 느리게 나타났다. 폐기율은 $5^{\circ}C$ 저장시 EW-2 처리구에서 저장 5일째까지 10%수준을 보여 무처리 및 염소수 처리에 비해 낮은 폐기율을 보여주었고, 조직감도 $5^{\circ}C$ 저장 전기분해수 처리구에서는 저장 3일까지는 조직감 변화가 거의 없다가 그 이후 오히려 증가하는 경향을 나타내었다. 딸기의 표면색도 변화는 저장기간이 경과할 수록 무처리구와 CW 처리구는 전반적으로 L값이 증가하는 경향을 보인 반면에 전기분해수 처리구는 감소하는 경향을 보여 주었고, 저장기간별 색차(${\Delta}E$)값은 저장 3일까지는 무처리구가 가장 적은 변화를 나타내었다. 전기분해수 처리에 의한 초기 잔류염소량은 $0.04{\sim}0.06ppm$수준이며 저장 1-3일 경과 후에는 모든 처리구에서 $0.02{\sim}0.03ppm$ 수준으로 잔류염소량이 거의 동일하게 나타났다. 저장중 관능적 특성은 전기분해수 처리구(EW-1 및 EW-2)가 무처리 및 CW 처리구에 비해 높게 나타났다.

• 한국식품조리과학회지
• /
• 제16권6호
• /
• pp.530-537
• /
• 2000

본 연구에서는 보교조생(Bogyo-joseng)과 수홍(Suhong) 딸기에 설탕량의 25, 50, 75, 100%로 프락토올리고당을 대체하여 잼을 제조한 후, 수분, pH, 색도, 스프레드메타치, 당도, 환원당함량, 안토시아닌 잔존율, 기계적인 texture및 관능검사를 실시하여 그 품질 특성을 비교 검토하였다. 수분함량은 수홍이 보교조생보다 다소 높았다. pH는 보교조생과 수홍 잼이 각각 동일하였으며, 시료간에 유의차가 없었다 L, a, b값 모두 보교조생이 수홍보다 다소 높았다. 스프레드메타치는 보교조생과 수홍 잼 모두 프락토올리고당의 첨가량이 많아질수록 감소하는 경향을 나타내었다. 당도는 수홍이 보교조생보다 다소 높았다. 환원당 함량은 수홍이 보교조생보다 다소 높았고, 보교조생과 수홍 잼 모두 설탕만 첨가한 잼에 비해 프락토올리고당의 첨가량이 많아질수록 점차 증가하였다. 안토시아닌 잔존율은 보교조생 잼은 설탕만 첨가한 잼에 비하여 프락토올리고당을 첨가했을 때 모두 감소하는 경향을 나타냈으며, 수홍 잼은 프락토올리고당을 50% 첨가했을 때만 다소 증가하였고, 나머지는 모두 감소하였다. Springiness(탄력성) 및 cohesiveness(응집성)은 보교조생과 수홍 잼 모두 프락토올리고당의 첨가량이 많아질수록 다소 증가하였다. Resilience탄성)는 보교조생과 수홍 잼 모두 미비하게 감소하였다 관능검사 결과는 보교조생 잼은 프락토올리고당 50% 첨가가 가장 높은 점수를 나타내었고, 수홍 잼은 프락토올리고당 25% 첨가가 가장 높은 점수를 나타내었다.

• 농업과학연구
• /
• 제33권1호
• /
• pp.11-16
• /
• 2006

Joint marketing defines marketing activity which aims scale economies, quality improvement, and reducing marketing costs, through regrouping and sharing roles between farmers, regional cooperative, and national agriculture cooperative federation. As a case study for joint marketing, an empirical analysis was done for strawberry joint marketing in Nonsan city and future directions for joint marketing were deduced.