• 한국조리학회지
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• 제23권5호
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• pp.25-33
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• 2017

This study was to investigate the effects of enzyme on quality characteristics and antioxidant activities of wild peach (Prunus persica L.) juice. pH levels and S.S (soluble solid) values in all samples ranged from 3.86 to 4.13 and from 48.0 to $55.0^{\circ}Brix$, respectively. The TA (total acidity) values of control (not treatment enzyme) were higher than those of the others. The highest 'L', 'a' and 'b' values were observed on PWP (preserved wild peach (Prunus persica L.) juice of cellulase/pectinase (1:1, w/w) sample. Glucose (26.65 g/100 g) and fructose (17.42 g/100 g) in PWP product were determined, however sucrose and maltose were not detected. The predominating organic acid components analyzed in PWP sample were tartaric (32.36 g/100 g) and lactc acids (209.34 g/100 g), whereas citric acid, acetic acid and malic acid were not detected. Higher scores for taste, flavor, color and overall acceptance were found for PWP products compared to other samples. The total phenolic content (13.31 mg GAE/mg dry weight) analyzed using Folin-Ciocalteu's reagent, of PWP sample was higher than those of the others and the total flavonoid concentrations were also 10.95 mg CE/mg dry weight. The DPPH radical scavenging and ABTS radical scavenging activities in all samples ranged from 55.16 to 74.29% and from 39.59 to 82.79%, respectively. The antioxidant activities were affected by addition of enzyme. These results indicate that the use of the mixture of cellulase and pectinase could increase the quality, and antioxidant potentials of sugar preserved wild peach (Prunus persica L.) juice by enzymatic treatment.

• 한국산림과학회지
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• 제95권2호
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• pp.174-176
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• 2006

The experiments were conducted by supplying hosts with natural food(chestnut, peach, Quince). The developmental difference of peach pyralid moth, Dichocrocis punctiferalis was examined in the laboratory under three different natural food regime. The periods of egg, larva and pupa were $6.01{\pm}0.07$, $12.23{\pm}0.03$ and $13.32{\pm}0.01$ days on the chestnut fruit, $6.21{\pm}0.01$, $18.69{\pm}0.02$ and $13.38{\pm}0.03$ days on the peach fruit and $7.02{\pm}0.04$, $22.62{\pm}0.04$ and $13.44{\pm}0.14$ days on the quince fruit, respectively. The growth of D. punctiferalis larva was better chestnut fruit than other tested fruits. The rates(%) of hatching, pupation and emergence were 94.0, 57.0 and 63.3 on the chestnut fruit, 89.2, 77.8 and 85.7 on the peach fruit and 79.6, 52.6 and 70.7 on the quince fruit, respectively. The survival rate(%) of D. punctiferalis from hatching to emergence were 31.0 on the chestnut fruit, 4.8 on the peach fruit and 14.3 on the quince fruit, respectively. The sex ratio (female: male) of all pupae obtained on the tested natural food fruits were 52.7 : 47.3. The sex ratio of D. punctiferalis reared on three difference food fruits were no significantly. It can be used a as the basic research for the study of D. punctiferalis.

• 한국환경농학회지
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• 제37권1호
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• pp.41-48
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• 2018

BACKGROUND: This study was performed to calculate the biological half-lives and regression coefficient of bistrifluron and cyenopyrafen dissipation in peach and to estimate the Pre-Harvest Residue Limits (PHRLs). METHODS AND RESULTS: The bistrifluron and cyenopyrafen were prepared on the basis of good agricultural practice for peach and treated with a single application. Peaches were harvested at 0, 1, 3, 5, 7, 10 and 14 days after application, prepared for analysis, and analyzed by HPLC-DAD. The limits of quantitation (LOQ) of bistifluron and cyenopyrafen were 0.02 mg/kg and 0.04 mg/kg, respectively. The recoveries of bistrifluron and cyenopyrafen were 99.5~108.7% and 88.4~98.9% at two different concentration levels. The biological half-lives of field I (Sejong) and field II (Pyeongtaek) were 6.1 and 7.0 days for bistifluron, and 6.3 and 7.0 days for cyenopyrafen, respectively. The 95% confidence intervals of dissipation rate constants of bistrifluron in peach were 0.0805~0.1457 and 0.0577~0.1417 for field I and field II, respectively, and those of cyenopyrafen were 0.0911~0.1278 and 0.0576~0.1417, respectively. CONCLUSION: Residue dissipation of bistrifluron and cyenopyrafen in peach were similar to that of correction to sample weight difference during the harvest periods. This study suggests that residue dissipation rate would be helpful to set the PHRLs that protect public health.

• 식물병연구
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• 제7권1호
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• pp.37-41
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• 2001

복숭아 수확 후 보르도액의 살포효과를 구명하기 위하여 미백도 품종에 대해 9월 중순부터 1∼3회 살포한 후 이듬해 5월부터 세균성구멍병 이병율을 조사하였을 때, 보르도액 살포에 의한 방제효과는 살포횟수가 많을수록 높게 나타났다. 복숭아 수확기인 8월 상순의 경우 잎에서는 무처리구의 27.4%∼38.1%에 비해 보르도액 살포구에서는 9.7%∼31.8%의 이병율로 16.5%∼64.6%의 방제가를 보였고, 과실에서도 잎에서와 비슷한 경향이었는데 무처리구의 17.2%∼21.6%에 비해 41.9%∼70.9%의 방제가를 나타내었다. 보르도액 살포로 인한 약해는 6-6식 보르도액에서 2정도의 약해를 나타내었고, 4-12식 및 4-8식 보르도액에서는 약해가 없었으며, 복숭아 품종간에는 차이를 보이지 않은 경향이었다.

• 한국식품영양학회지
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• 제28권4호
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• pp.643-649
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• 2015

This study was performed to determine the optimal month of harvest between May and July for wild peach (Prunus davidiana) by comparison of functional materials. The general composition, amino acid and vitamin (A, C, and E) content, and antioxidant activity were determined. With respect to the general composition of wild peach according to the month of harvest, wild peach harvested in May (HMP) and July (HJP) contained mostly carbohydrate, the contents of which amounted to 77.37 g/100 g and 77.92 g/100 g, respectively. The total amino acid content of HMP and HJP were 675.29 mg% and 573.25 mg%, respectively. Regarding the vitamin contents, vitamin A (retinol), E (${\alpha}-tocopherol$) and C in HMP were higher than those in HJP. The total polyphenol content of HMP (218.37 mg TAE/g) was higher than that of HJP (71.45 mg TAE/g). The total flavonoid content of HMP (64.95 mg RE/g) was also higher than that of HJP (32.67 mg RE/g). Moreover, the DPPH and ABTS radical scavenging activities ($IC_{50}$) were higher in HMP ($137.18{\mu}g/mL$ and $157.15{\mu}g/mL$) than those in HJP ($160.10 {\mu}g/mL$ and $186.01 {\mu}g/mL$), meaning that the former produces better antioxidant effects. It can be concluded that wild peach harvested in May contained higher functional materials such as vitamins and amino acids and had a higher antioxidant effect, than wild peach harvested in july.

• 한국식품저장유통학회지
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• 제7권4호
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• pp.349-356
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• 2000

본 연구는 소비자와 생산자는 물론이고 유통종사자까지도 모두 이익을 볼 수 있는 과학적이고 합리적인 등급화 방안의 모색을 위해 복숭아 생산자, 유통종사자, 소비자의 등급화에 대한 실태 및 의향을 조사 분석하여 각 주체의 입장차이를 조화시킬 수 있는 방안을 도출함을 목적으로 하고 있다. 1997년부터 1999년까지 3년에 걸쳐 생산농가, 소비자 및 유통종사자를 대상으로 면접청취조사와 질문지법을 병행하여 복숭아 농가 등급화실태, 소비실태 및 소비의향, 유통실태를 조사하였다. 현행 등급 기준으로 가장 중요시하는 것은 생산농가에서는 무게를, 유통종사자 및 소비자는 색깔로 나타났으며, 무게와 색깔은 복숭아를 먹어보기 전에 맛을 예측하는 방법으로 향후 비파괴 당도선별이 가능할 경우에는 생산농가, 유통종사자, 소비자 모두가 당도를 1순위로 선택하였다. 특히 소비자는 당도를 가장 중요시하며 소량구입 및 소포장 상자규격을 가장 선호하는 것으로 나타났다. 그러므로 소비자를 비롯하여 생산자 및 유통종사자들 모두가 이익을 얻을 수 있는 바람직한 복숭아 표준화, 등급화를 이룰 수 있는 세부포장규격을 신설하고 등급을 당도와 무게 범위로 표시하는 이원적인 체계가 시행될 수 있도록 등급을 세분화할 필요성이 대두되고 있다.

• Food Science and Biotechnology
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• 제17권6호
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• pp.1327-1331
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• 2008

In order to determine whether peach contains compounds to regulate adipocyte differentiation, extracts of flesh/pericarp of yellow/white peach were prepared in water, ethyl acetate (EtOAc), or n-butanol solvent and determined for effects on adipocyte differentiation in C3H10T1/2 or 3T3-L1 cells. Interestingly, none of peach extracts has statistically significant stimulatory effect on the adipocyte differentiation in C3H10T1/2. Furthermore, the presence of EtOAc extract of white peach pericarp (WPP) was found to inhibit lipid accumulation in 3T3-L1 cells both by microscopic examination of Oil Red O-stained lipid droplets and by spectrophotometric quantification of extracted stain, indicating a significant inhibitory effect on adipocyte differentiation. The inhibition of lipid accumulation was accompanied by a significant decrease in the expression levels of adipocyte molecular markers-peroxisome proliferator-activated receptor $\gamma$, CAAT enhancer binding protein $\alpha$, and fatty acid-binding protein. Thus, this study determined that WPP EtOAc extract contains the inhibitory compound(s) on adipogenesis.

• 한국근적외분광분석학회:학술대회논문집
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• 한국근적외분광분석학회 2001년도 NIR-2001
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• pp.1267-1267
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• 2001

The existing fruit sorter has the method of tilting tray and extracting fruits by the action of solenoid or springs. In peaches, the most sort processing is supported by man because the sorter make fatal damage to peaches. In order to sustain commodity and quality of peach non-destructive, non-contact and real time based sorter was needed. This study was performed to develop peach sorter using near-infrared spectroscopy in real time and nondestructively. The prototype was developed to decrease internal and external damage of peach caused by the sorter, which had a way of extracting tray with it. To decrease positioning error of measuring sugar contents in peaches, fiber optic with two direction diverged was developed and attached to the prototype. The program for sorting and operating the prototype was developed using visual basic 6.0 language to measure several quality index such as chlorophyll, some defect, sugar contents. The all sorting result was saved to return farmers for being index of good quality production. Using the prototype, program and MLR(multiple linear regression) model, it was possible to estimate sugar content of peaches with the determination coefficient of 0.71 and SEC of 0.42bx using 16 wavelengths. The developed MLR model had determination coefficient of 0.69, and SEP of 0.49bx, it was better result than single point measurement of 1999's. The peach sweetness grading system based on NIR reflectance method, which consists of photodiode-array sensor, quartz-halogen lamp and fiber optic diverged two bundles for transmitting the light and detecting the reflected light, was developed and evaluated. It was possible to predict the soluble solid contents of peaches in real time and nondestructively using the system which had the accuracy of 91 percentage and the capacity of 7,200 peaches per an hour for grading 2 classes by sugar contents. Draining is one of important factors for production peaches having good qualities. The reason why one farm's product belows others could be estimated for bad draining, over-much nitrogen fertilizer, soil characteristics, etc. After this, the report saved by the peach grading system will have to be good materials to farmers for production high quality peaches. They could share the result or compare with others and diagnose their cultural practice.

• 생명과학회지
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• 제22권11호
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• pp.1487-1492
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• 2012

복숭아는 오래 전부터 알레르기를 일으키는 식품으로 알려져 있으나 특정 식품과의 교차반응에 대한 연구는 부족한 실정이다. 본 연구에서는 한국에서 재배되고 있는 복숭아, 앵두, 고추의 단백질을 추출하여 복숭아 알레르기를 가진 환자가 앵두와 고추에 대해 교차반응성을 일으키는지 확인하고 이 단백질들의 소화효소처리에 따른 안정성을 조사하였다. 복숭아, 앵두 및 고추 단백질 추출물은 Tricine-SDS-PAGE상에서 3 kDa부터 26 kDa 이상까지 넓은 범위의 단백질 분포를 보였으나 각기 다른 패턴을 가지는 것을 확인하였다. 복숭아 단백질의 항원성을 확인하기 위해 복숭아 민감성 환자의 혈청과의 IgE반응성을 확인한 결과, 환자 혈청은 모두 복숭아의 주요 항원성 단백질 lipid transfer protein로 예상되는 9 kDa 부근에서 강한 IgE결합력을 보였으며 또한 9 kDa 단백질이 anti-LTP1 polyclonal antibody에 의해 검출되는 것을 확인하였다. 앵두와 고추 단백질 추출물은 23 kDa 부근에서의 IgE결합력이 9 kDa과의 반응성보다 크게 나타났다. 복숭아, 앵두 및 고추의 소화효소에 대한 안정성을 SDS-PAGE 상에서 확인한 결과, 복숭아, 앵두 및 고추의 항원성 단백질은 인공 위액 및 장액에 의해 완전히 분해되지 않아 알레르기를 유발할 잠재성이 있는 것을 확인할 수 있었다. 본 연구 결과를 바탕으로, 복숭아, 앵두 및 고추 단백질 추출물이 소화효소처리에 안정성을 가지는 특성을 가지며 복숭아 알레르기 증상을 가지는 사람에게 앵두 및 고추는 교차반응성을 일으킬 가능성이 크다는 것을 확인할 수 있었다.

• 생명과학회지
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• 제16권7호
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• pp.1071-1079
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• 2006

야생 돌복숭아(Prunus persica Batsch var. davidiana Max.)의 생리활성 추출물질이 선천성 고혈압 흰쥐(SHR)의 지질대사 이상 및 고혈압 예방과 개선효과 등에 생리생화학적 효능이 있을 것으로 추정되어 Wistar 계 수컷 SHR을 사용하여, 기본식이와 물만을 급여한 대조군인 Control군과 SHR에 돌복숭아 5.0g% 추출액을 급여한 군(5g% Ex.군) 및 SHR에 돌복숭아 10.0g% 추출액을 섭취시킨 10g% Ex.군을 33일간 실험 사육하여 혈청 지질성분 및 혈압 저하 효과를 생리적 측면에서 검토하기 위하여 본 실험을 수행하였다. 혈청 중의 총 콜레스테롤 농도, 중성지방, LDL-콜레스테롤, 유리 콜레스테롤 및 동맥경화지수 등에서 돌복숭아 생리활성물질 5.0g%, 10.0g% 추출액을 섭취시킴으로서 유의적인 농도 등의 감소 효과를 보였으며, HDL-콜레스테롤 농도 및 총 콜레스테롤에 대한 HDL-콜레스테롤 비는 상승되는 것으로 나타났다. 한편, 간장 및 뇌 중의 총 콜레스테롤, 중성지방 농도는 돌복숭아 5.0g%, 10.0g% 추출액을 섭취시킨 군에서 감소되는 것으로 나타났다. 반면, 혈청 apolipoprotein(Apo) A-I, Apo A-II 농도 등은 돌복숭아 5.0g%, 10.0g% 추출액을 섭취시킨 군에서 유의적으로 증가되는 것으로 나타났다. 또한 Apo C-II, Apo C-III, Apo E 및 Apo A-I에 대한 Apo B의 농도 비는 감소되었으며, 혈압의 변화는 SHR에 돌복숭아 5.0g% 및 10.0g% 추출액을 섭취시킴으로서 혈압이 저하됨을 관찰할 수가 있었다. 돌복숭아 5.0g% 농도(5g% Ex.군)와 10.0g% 농도(10g% Ex.군)의 추출액 섭취에 따른 두 군간에 각종 지질성분과 apolipoprotein 분획 농도 및 혈압 변화의 비교는 유의적인 차이는 없었다 따라서 야생 돌복숭아 중의 생리활성물질 추출액 섭취가 선천성 고혈압 흰쥐에 대한 혈청 지질개선 및 심장순환기계 질환, 고혈압의 예방과 치료개선에 효과가 있을 것으로 생각된다.