• 제목/요약/키워드: Grape by-product

검색결과 38건 처리시간 0.024초

Impact of a reduction in the quality of Shine Muscat on the grape variety market using the Armington model

  • Byung Min, Soon;Sumin, Cho;Sounghun, Kim
    • 농업과학연구
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    • 제48권4호
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    • pp.911-926
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    • 2021
  • We devised a grape variety model to estimate the impact of lowering the Shine Muscat quality level on the grape market. Shine Muscat has become a popular grape variety in Korea. Accordingly, the area devoted to the harvesting of Shine Muscat has increased dramatically since 2016. Our study examines how a reduction in the quality of Shine Muscat affects other grapes such as Campbell Early, giant peak, and Muscat Bailey A (MBA). The Armington model was used to impose consumer preferences and product differentiation assumptions. We found that a decrease in the consumer preference for Shine Muscat realized by lowering the quality of Shine Muscat largely reduces the price of this variety. Also, the prices of other grape varieties fell via a substitute effect. Moreover, if grape varieties were more differentiated, the reduction in the price of Shine Muscat would be greater, while the decreases in the prices of other grape varieties would be smaller. These results imply that farmers of Shine Muscat must continue with quality management efforts to avoid the negative effect of changing consumer behavior with regard to Shine Muscat against a reduction in its quality. Our model introduces a product differentiation model for the fruit market and helps policymakers and farmers understand the impact of changing market conditions in the fruit market.

Characterization of phenolic compounds biosynthesized in pink-colored skin of Japanese indigenous Vitis vinifera cv. Koshu grape

  • Kobayashi, Hironori;Suzuki, Yumiko;Ajimura, Kosei;Konno, Tomonori;Suzuki, Shunji;Saito, Hiroshi
    • Plant Biotechnology Reports
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    • 제5권1호
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    • pp.79-88
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    • 2011
  • Vitis vinifera cv. Koshu is a traditional grape cultivar that has been grown for centuries in Japan. The Koshu grape has pink-colored skin and Koshu wines have slight astringency. We demonstrated for the first time the characterization of hydroxycinnamic acids, flavan-3-ols, and flavonoids in Koshu grape using high-performance liquid chromatography and liquid chromatography-mass spectrometry. The gross weight of phenolic compounds excluding anthocyanins and proanthocyanidins in Koshu grape at harvest was higher than those in Sauvignon Blanc, Chardonnay, and Merlot grapes. In addition, hydroxycinnamic acid and monomeric flavonol contents in Koshu grape were also higher than those in the other grape cultivars. Transcription analysis of cinnamic acid 4-hydroxylase, p-coumarate 3-hydroxylase, caffeate methyltransferase, and flavonol synthase genes indicated high accumulation of hydroxycinnamic acids and flavonols in Koshu grape skin compared with the other cultivars. These findings obtained by chemical and molecular approaches partially explained the phenolic characteristics and the peculiar astringency of Koshu grape.

포도가공부산물을 이용한 젖소의 대사활성 증진 및 우유품질 향상에 관한 연구 (Effect of Dietary Grape By-product on Milk Yield, Milk Composition and Blood Metabolites of Dairy Cows)

  • 김상범;박중국;김태균;임동현;이현준;기광석;손준규;김현수;김삼철;권응기
    • 농업생명과학연구
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    • 제45권6호
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    • pp.135-140
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    • 2011
  • 본 시험은 포도부산물의 첨가가 젖소의 산유량, 유성분 및 혈액 성상에 미치는 영향을 조사하기 위하여 실시하였다. 비유중기 젖소 8두(평균 월령: 89.8, 평균 유기: 164.4, 평균 산차: 2.8산)를 공시하였으며, 포도부산물을 첨가하지 않은 대조구와 1일 1 kg을 첨가한 시험구로 두 처리구를 설정하여 3주간 급여하였다. 유지방, 유단백, 유당 및 총 고형물 함량은 처리간에 차이가 없었다. 그러나 산유량은 포도부산물을 첨가한 처리구가 23.13 kg/d으로 대조구의 21.16 kg/d에 비해 높은 반면(p<0.05), 체세포 수는 대조구가 포도부산물 처리구에 비해 높았다(p < 0.05). 혈중 glucose, alanine aminotransferase, total protein 및 blood urea nitrogen 함량은 처리구간 차이가 없었으나, AST와 총콜레스테롤 함량은 대조구(123.75 IU/L, 200.82 mg/dl)가 포도부산물 처리구(95.34 IU/L, 180.63 mg/dl)에 비해 높았다(p<0.05). 이상의 결과에서, 다양한 생리활성을 가진 포도부산물은 젖소를 위한 기능성 사료로 이용 가능성이 높을 것으로 사료된다.

발효 머루 부산물을 급여한 돈육의 품질 및 기호성 (Quality and Palatability of Pork Meats Fed with Fermented Wild Grape By-product)

  • 박경숙;정인철
    • 동아시아식생활학회지
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    • 제15권6호
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    • pp.759-765
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    • 2005
  • This study was carried out to investigate the feeding effects of fermented wild grape by-product on pork meat qualities. The samples consisted of the pork not fed fermented wild grape byproduct(FWG-X) and the pork fed fermented wild grape byproduct(FWG-O). The moisture, crude protein, crude fat and crude ash were not significantly different between samples. The cholesterol and TBARS of FWG-O were lower than those of the FWG-X, and the salt soluble protein extractability of FWG-O was higher than that of the FWG-X(p<0.05). The calorie, cooking loss, water holding capacity, pH and volatile basic nitrogen were not significantly different between FWG-X and FWG-O. The meat colors of the a and b value of FWG-O were higher than those of the FWG-X, and in case of the fat color, the a value of FWG-O was higher than that of the FWG-X. The hardness, springiness, cohesiveness, gumminess, chewiness and shear force were not significantly different between FWG-X and FWG-O. The total amino acid contents of FWG-X and FWG-O were 74.35 and 69.59g/100g protein, respectively, The raw meat color of FWG-O was higher than that of the FWG(p<0.01), and the cooked meat color(p<0.05), taste(p<0.001), flavor(p<0.001), juiciness(p<0.01) and palatability(p<0.01) were superior to those of the FWG-X. This study showed that fermented wild grape by-product decreased the cholesterol content and lipid oxidation with enhancing the sensory score.

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Effect of dietary supplementation of grape skin and seeds on liver fibrosis induced by dimethylnitrosamine in rats

  • Shin, Mi-Ok;Moon, Jeon-Ok
    • Nutrition Research and Practice
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    • 제4권5호
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    • pp.369-374
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    • 2010
  • Grape is one of the most popular and widely cultivated fruits in the world. Although grape skin and seeds are waste product of the winery and grape juice industry, these wastes contain large amounts of phytochemicals such as flavonoids, phenolic acids, and anthocyanidins, which play an important role as chemopreventive and anticancer agents. We evaluated efficacies of grape skin and seeds on hepatic injury induced by dimethylnitrosamine (DMN) in rats. Treatment with DMN significantly increased levels of serum alanine transaminase, aspartate transaminase, alkaline phosphatase, and bilirubin. Diet supplementation with grape skin or seeds (10% daily for 4 weeks) prevented these elevations. The grape skin and seeds also restored serum albumin and total protein levels, and reduced the hepatic level of hydroxyproline and malondialdehyde. Furthermore, grape skin and seeds reduced DMN-induced collagen accumulation, as estimated by histological analysis of liver tissue stained with Sirius red. Grape skin and seeds also reduced hepatic stellate cell activation, as assessed by ${\alpha}$-smooth muscle actin staining. In conclusion, grape skin and seeds exhibited in vivo hepatoprotective and antifibrogenic effects against DMN-induced liver injury, suggesting that grape skin and seeds may be useful in preventing the development of hepatic fibrosis.

포도소비수준에 따른 포도선택속성 중요도-만족도 분석 (Analysis of the Importance-Satisfaction of the Grape Selection Attributes by Grape Consumption Level)

  • 최승균;김태영;김수민;백진경;최희령;김태인;홍완수
    • 한국식생활문화학회지
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    • 제34권5호
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    • pp.595-603
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    • 2019
  • This paper provides data for product development and improvement of grape varieties by analyzing the satisfaction-importance of the grape selection attributes from a consumer's perspective. A survey was conducted on consumers aged 19-59 living in Seoul, Gyeonggi and Incheon on their fruit consumption level, preferences according to the grape quality characteristics, importance, and satisfaction with the grape selection attributes. Three hundred and eighty two valid samples were collected and analyzed statistically using SPSS 23. In the preference according to the grape quality characteristics, consumers tended to prefer a sweet taste, black color, and seedless grapes. Regarding the importance of the grape selection attributes according to the level of grape consumption, the high consumption group considers texture, size, shape, color, ease of removing seeds, country of origin, area of production, certification, and brand to be more important. In satisfaction, the high consumption group rated satisfaction highly in texture, odor, size, shape, color, ease of removing peelings, ease of removing seeds, price, country of origin, area of production, certification, and brand. An analysis of the IPA of the grape selection attributes showed that improvement of price and shape attributes will be prioritized, and the development and management of properties, such as seeds, peelings, certification, and brand will be required. These results can be used to help improve the grape varieties and develop products that meet the consumer needs, secure the competitiveness of grape farmers, and revitalize the local economy.

Identification and Quantification of Flavonoids in Korean Wild Grape (Meoru grape, Vitis coignetiae) and Its Pomace

  • Shim, Kwan-Seob;Kang, Da-Rae;Park, Seong-Bok;Park, Jong Hyuk;Chung, Yi Hyung;Kang, Young-Hee;Shin, Daekeun
    • 한국자원식물학회지
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    • 제27권6호
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    • pp.650-659
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    • 2014
  • Large quantities of Korean wild grape (Vitis coignetiae, KWG) pomace, a by-product of grape juice and wine manufacture, are generated annually, and disposal cost of KWG pomace is now increasing. Therefore, this study was conducted to determine total polyphenol, flavonoid, and anthocyanin content in whole KWG, KWG skin and KWG pomace and to identify and quantify flavonoids found in whole KWG and KWG pomace using LC/MS/MS. Spectral analysis showed high total polyphenol and flavonoid in KWG skin extracted with 75% ethanol (p < 0.05). KWG pomace had higher amount of total polyphenol, flavonoid and anthocyanin than whole grape (p < 0.05). Sixteen flavonoids were identified, but only 10 flavonoids were quantifiable from whole KWG and KWG pomace. Both epicatechin and rutin were the major flavonoids, and 521 or 147 ng/g of epicatechin (p < 0.05) and 305 or 110 ng/g of rutin (p > 0.05) were found in whole KWG and KWG pomace, respectively. The results show that KWG pomace is a very rich source of flavonoids, thus KWG pomace can be used as a functional food additive. Plans to include KWG pomace in food production are necessary.

산머루주 박 급여가 버크셔종의 등심 품질특성에 미치는 영향 (Effects of Supplementary Wild Grape Wine By-product on Quality Characteristic of Loin from Berkshire Breed)

  • 김태완;김철욱;김일석
    • Journal of Animal Science and Technology
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    • 제50권2호
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    • pp.247-254
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    • 2008
  • 경남 함양지방의 양돈장에서 사육중인 아메리칸 버크셔종을 대상으로 산머루주 부산물을 배합사료와 혼합한 시험사료 5%를 20두에 대해 생시체중 70 kg에서 88일간 급여한 후 등심부위를 채취하여 품질평가를 실시하였다. 일반성분 분석결과 수분과 조지방은 대조구와 처리구 간에 유의적인 차이를 나타내지 않았으나(p>0.05), 조단백질과 조회분은 처리구가 낮았다(p<0.05). pH와 WHC는 대조구와 처리구 간에 차이가 없었고(p>0.05), 콜레스테롤과 지방의 전단가는 처리구가 낮게 나타났다(p<0.05). 육색은 차이가 없었으나(p>0.05), 지방색에서의 명도와 백색도는 처리구가 높았다(p<0.05). Oleic acid(C18:1), linoleic acid(C18:2, n-6), arachidonic acid(C20:4, n-6), 필수아미노산 및 EFA/UFA에서 유의적인 차이가 나타났다(p<0.05). 총 아미노산 함량은 대조구와 처리구 간에 유의적인 차이가 없었으나(p>0.05), 필수아미노산은 처리구가 대조구 보다 높게 나타났다(p<0.05). 이상에서 산머루주 박 급여 시 등지방색, 전단가, 콜레스테롤 및 필수지방산의 함량이 개선되는 것으로 나타나 산업적 응용 가능성이 있을 것으로 판단되었다.

머루주 박의 급여가 돈육 등심의 품질에 미치는 영향 (Effects on Quality Characteristics of Pork Loin Fed with Wild Grape(Vitis amurensis Ruprecht) Wine By-product)

  • 정인철;문윤희
    • 한국축산식품학회지
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    • 제25권2호
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    • pp.168-174
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    • 2005
  • 본 연구는 머루주박 사료가 돈육의 품질에 미치는 영향을 검토하기 위하여 수행하였다. 일반성분, VBN, TBARS 및 pH는 대조구와 머루주박 급여구 사이에 차이가 없었으나 콜레스테롤 함량과 가열감량은 대조구보다 머루주박 급여구가 낮았고, 염용성 단백질 추출성은 머루주박 급여구가 높았다. (p<0.05). 돈육의 $a^{\ast}$$b^{\ast}$값이 머루주박 급여 돈육이 높았고, 지방은 대조구보다 머루주박 급여구의 $a^{\ast}$값이 높았다(p<0.05). 그러나 $L^{\ast}$값은 돈육과 지방에서 대조구와 머루주박 급여구 사이에 유의한 차이가 없었다. Cohesiveness, gumminess 및 chewiness는 대조구(각각 $66.2\%$, 428kg 및 189g)가 머루주박 급여구(각각 $61.4\%$, 357 kg 및 154 g)보다 높았다. (p<0.05). 총유리아미노산 함량은 두 시료 사이에 차이가 없었지만 공통적으로 많이 함유된 아미노산은 glutamic acid, leucine, arginine 및 aspartic acid의 순이었다. 지방산 조성에서 머루주박 급여 돈육의 arachidonic acid, EPA및 DHA함량이 대조구보다 높았다. (p<0.05) 그리고 머루주박 급여 돈육의 맛(p<0.001), 향기(p<0.05), 풍미(p<0.001), 다즙성(p<0.01) 및 전체적인 기호성(p<0.01)이 대조구보다 유의하게 높았다.

포도과즙(葡萄果汁) 우유(牛乳) 혼합음료(混合飮料)의 시제(試製) (A Note on Preparation of Acid Milk Drink Containing Natural Grape Juice)

  • 하덕모
    • 한국식품과학회지
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    • 제7권4호
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    • pp.250-253
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    • 1975
  • 포도과즙(果汁), 산유(酸乳), 설탕을 주원료로하여 포도과즙(果汁) 혼합음료를 제조하고 동(同) 음료의 보존성을 검토하여 다음과 같은 결과를 얻었다. 1) 포도과즙(果汁) 산유(酸乳) 혼합음료는 과즙(果汁)중의 colloid와 유(乳)단백질의 결합에 의하여 응집 침전물을 형성하며 가열살균에 의하여 침전물의 형성이 촉진된다. 2) 원료과즙(果汁)의 pectin함량은 제품의 안전성에 직접적으로 관계되며 과즙(果汁)중의 pectin함량은 제품의 안전성에 직접적으로 관계되며 과즙(果汁)중의 pectin함량이 2.5mg% 이하일 때 과즙 $10{\sim}20%$ 혼합시에 있어서도 응집 침전물의 형성을 방지할 수 있다. 3) pectin분해효소로써 처리한 투명과즙(果汁)을 사용하여 제조한 혼합음료는 $85^{\circ}C$ 20분간의 가열살균으로 응집 침전물이 형성되지 않으면 장기간의 저장이 가능하다.

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