• 한국식품영양학회지
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• 제33권1호
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• pp.91-97
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• 2020

The purpose of this study was to provide the basic data of butternut squash (Cucurbita moschata) according to the drying methods. The proximate composition and chromaticity of freeze-dried and hot air-dried Cucurbita moschata powders were evaluated, and the antioxidant effects of these ethanolic extracts were analyzed by DPPH, ABTS, FRAP, reducing power activity, total phenolic, and flavonoid content. As a result, Cucurbita moschata was revealed to have high carbohydrate and crude protein contents, while crude ash and crude fat contents were relatively low. Also, it was confirmed that the hot air-dried Cucurbita moschata had lower L, a, and b values than the freeze-dried Cucurbita moschata. Additionally, as a result of analyzing the antioxidant activity of Cucurbita moschata ethanolic extracts, hot air-dried Cucurbita moschata ethanolic extract showed significantly superior antioxidant activity than freeze-dried Cucurbita moschata ethanolic extract. Also, hot air-dried Cucurbita moschata ethanolic extract was revealed to have a higher polyphenol content, but slightly lower flavonoid content than freeze-dried Cucurbita moschata ethanolic extract. Based on the data from this study, further experiments on Cucurbita moschata material are necessary.

• 한방비만학회지
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• 제9권2호
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• pp.57-63
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• 2009

In recent year, We are concerned about anti-aging, disease-protection, long-life, many methods are used in solving this problem. And Those are related with antioxidative ability. Recently, We heard that Cucurbita moschata Duch. has anti-hypertensive effect and good for health. So I let made a experiment for this result of the anti-oxidant effect of Cucurbita moschata Duch. used for 3 methods, those are DPPH radical scavenging activity, Nitric oxide(NO) radical scavenging activity and Bovine serum albumin(BSA). The results of this study were as follows: We measured level of DPPH radical scavenging activity. And we obtained results that the ability of DPPH radical's elimination was increased when concentration of Cucurbita moschata Duch. was to $20\;mg/m{\ell}$. We measured level of Nitric oxide(NO) radical scavenging activity. And we founded that the ability of NO radical's elimination was increased when concentration of Cucurbita moschata Duch. was to $10\;mg/m{\ell}$. When we inspected antioxidation with Bovine serum albumin(BSA). And we obtained that antioxidative ability was increased after$2.5\;mg/m{\ell}$ of Cucurbita moschata Duch.. So I guess that Cucurbita moschata Duch. has effect of antioxidative ability. Hereafter we need differential experimental methods for evidence of antioxidative effect on Cucurbita moschata Duch.

• Preventive Nutrition and Food Science
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• 제6권2호
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• pp.133-135
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• 2001

The edible part of cucurbita moschata Duch, which is commonly used as a Korean traditional medicine as well as a popular food source, was studied to isolate anti-complementary substance. Extracts of Cucurbita moschata Duch showed significant anti-complementary activities on the classical pathway of the complement system. Especially, the ripe Cucurbita moschata Duch had more activity than that of the complement system. Especially, the ripe Cucurbita moschata Duch had more activity than that of the green one in terms of the overall anti-complementary activity. Among the extracts of various organic solvents of the ripe Cucurbita moschata Duch, chloroform and ethyl-acetate extracts, which are non-polar solvent extracts, showed the strongest activities. These results suggest that the major difference in the solvent extraction for the anti-complementary substances depends on the change in the chemical composition such as the fatty acid with the degree of ripening.

• 생명과학회지
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• 제13권5호
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• pp.590-595
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• 2003

The objective of this study was to assess of genetic variation within and between pumpkin species including Cucurbita maxima, C. moschata, C. pepo and C. maxima${\times}$C. moschata using RAPD markers. The 16 primers showed the amplification of 136 scorable fragments ranging from about 100 bp to 2300 bp. A total of 94 DNA fragments were polymorphic with an average 5.9 polymorphic bands per primer. A species $(C. maxima\timesC. moschata)$ has the highest number of polymorphic loci. Based on obtained data, UPGMA cluster analysis was conducted. Twenty pumpkin cultivars were classified into three large categories and identified genetic distance of cluster ranging from 0.38 and 1.00. Clustering was in accordance with the division of Curcurbitaceae into four species, C. maxima, C. moschata, C. pepo and C. $C. maxima\timesC. moschata$. Therefore, RAPD method may be essential tool for enabling discrimination of pumpkin cultivars.

• Preventive Nutrition and Food Science
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• 제6권4호
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• pp.244-246
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• 2001

Angiotensin converting enzyme (ACE) inhibitor acts on the inhibition of ACE and causes a decrease in blood pressure. There have been several reports on screening of ACE inhibitors from natural food products and protein hydrolysates of various food sources. Ripe Cucurbita moschata Duch has been used as an oriental medicine in Korea. To isolate ACE inhibitors, crude water extracts of the edible portion of ripe Cucurbita moschata Duch were obtained after heating in water at 95$^{\circ}C$ for 2 h. Crude extracts were then filtered using PM-10 and YM-1 membranes. The membrane-filtered solution was loaded onto Sephadex G-15 column equlibrated with a phosphate buffer. Among the four major fractions of gel permeation chromatography, the second fraction had the highest inhibitory activity of 65%. Further purification of the fraction using reversed-phase HPLC with a $C_{18}$ column produced ACE inhibitors, which were identified as a mixture having molecular mass of 222 and 273 by Tandem mass spectrometry.

• 한국식품과학회지
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• 제43권2호
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• pp.195-199
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• 2011

본 연구에서는 늙은호박(Cucurbita moschata Duch.)의 부위별 항산화 효과 및 생리활성을 평가하기 위하여 잎과 과피, 과육과 씨 네 부분으로 나누어 일반성분을 측정하고, 환류 추출과 감압농축 및 동결건조를 통하여 분말을 얻은 후 실험에 사용하였다. 호박의 부위별 총 폴리페놀 함량은 잎이 $29.62{\pm}0.88mg$ GAE/g DM로 가장 높게 측정되었다. 플라보노이드 함량도 잎이 가장 높고 과피, 과육, 씨의 순서로 측정되어 폴리페놀 함량과 같은 경향을 보였다. DPPH radical 소거 활성과 ABTS radical 소거 활성에서 SC50값을 측정하였을 때는 잎에서 가장 높은 소거 활성을 나타내었다(DPPH: $1.27{\pm}0.14$, ABTS: $2.28{\pm}0.05$). FRAP assay를 이용한 환원력을 실험한 결과에서도 잎에서 가장 높은 환원력이 관찰되었다. 한편, 생리활성적인 측면 중 tyrosinase 효소 억제 활성 능력은 대조군인 kojic acid와 비교하였을 때 같은 농도인 0.1 mg/mL에서 20.70%이었던 반면 실험군인 잎은 49.58%, 과육은 40.20%을 보였고, 과피는 41.30%, 씨는 36.79%가 관찰되어 모두 이보다 높은 수치를 나타냈으므로 kojic acid 보다 효과가 있는 것을 확인할 수 있었다. 최종당화산물(AGEs) 생성억제 효능에서는 잎(65.85%), 과피(50.14%), 과육(13.72%), 그리고 씨(11.18%)의 순서로 관찰되었다. ${\alpha}$-Glucosidase 저해활성은 씨 부분의 저해활성이 63.58%로 67.28%를 나타낸 대조군 0.06 mM acarbose에 근접한 수치를 나타내었다.

• 식물병연구
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• 제11권2호
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• pp.106-114
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• 2005

To breed powdery mildew resistant varieties, 104 accessions of Cucurbita spp. germplasm were evaluated. Powdery mildew resistance and horticultural characteristics of the accessions were investigated in the field conditions. C. martinezii was selected for high resistance to powdery mildew in the field. The growth of powdery mildew pathogen and response of leaf surface tissue to the pathogen were observed after artificial inoculation to resistant C martinezii and susceptible C. moschata cv. 'Wonye No.402'. Mycelium growth was very clearly different between resistant C. martinezii and susceptible C moschata cv. 'Wonye No. 402' at 5 days after inoculation at the adult stage. Interspecific hybridization was attempted to transfer powdery mildew resistance gene(s) from C. martinezii to C. moschata. A single dominant gene action was postulated as deter mining powdery mildew resistance at the seedling stage. But for the effective selection of powdery mildew resistant individuals, it was established that adult plant resistance should be confirmed in the field conditions after the seedling test. Through the seedling and field tests, C. moschata lines resistant to powdery mildew and superior to horticultural characteristics, were selected after 2 backcrossing and 3 selfing generations. The fruit characteristics of newly developed lines were similar to those of the recurrent parent, 'Jaechenjarae'.

• Applied Biological Chemistry
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• 제42권3호
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• pp.267-270
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• 1999

• Archives of Pharmacal Research
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• 제25권4호
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• pp.438-440
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• 2002

A new unsaturated hydroxy fatty acid was isolated from the leaves of Cucurbita moschata through repeated silica gel column chromatography and chemical methods. The structure of the new fatty acid was determined as 13-hydroxy-9, 11, 15-octadecatrienoic acid on the basis of several spectral data including 2D-NMR. The stererostructures of double bonds were determined to be 9Z, 11 E and 15E by coupling patterns of related proton signals in the $^1H-NMR$ and NOESY experiments.

• 한국식품저장유통학회지
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• 제24권8호
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• pp.1122-1128
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• 2017

애호박의 부위 중 덩굴손 유래의 열수 추출물에 대한 세포 독성 및 염증제어활성 대하여 조사하였다. 애호박 덩굴손의 열수에 대한 세포의 독성에 미치는 영향을 조사한 결과 0.313-2.5 mg/mL의 농도일 때 물 추출물은 세포의 생장에 영향을 미치지 않아 세포에 대한 독성이 없다고 판단되었다. BMDMs를 배양한 세포에 호박덩굴손 열수 추출물과 LPS와 함께 처리한 결과 염증성 사이토카인인 IL-6 및 TNF-${\alpha}$의 농도 의존적으로 감소함을 확인하였다. 호박 덩굴손 열수 추출물로부터 단리 정제된 rutin에 의한 염증성 사이토카인의 분비가 억제되었다. 국내에서 재배되고 있는 호박의 부위별로 조사해본 결과 호박부위 중 유일하게 덩굴손부분에서 염증억제 활성을 보였다. 쥬키니 호박, 애호박 및 늙은 호박의 덩굴손에서 유효성분인 rutin을 함유하고 있었고 향후 염증 억제 소재로서의 활용가능성을 시사하였다.