• 제목/요약/키워드: white wine

검색결과 62건 처리시간 0.029초

Wine quality grading by near infrared spectroscopy.

  • Dambergs, Robert G.;Kambouris, Ambrosias;Schumacher, Nathan;Francis, I. Leigh;Esler, Michael B.;Gishen, Mark
    • 한국근적외분광분석학회:학술대회논문집
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    • 한국근적외분광분석학회 2001년도 NIR-2001
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    • pp.1253-1253
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    • 2001
  • The ability to accurately assess wine quality is important during the wine making process, particularly when allocating batches of wines to styles determined by consumer requirements. Grape payments are often determined by the quality category of the wine that is produced from them. Wine quality, in terms of sensory characteristics, is normally a subjective measure, performed by experienced winemakers, wine competition judges or winetasting panellists. By nature, such assessments can be biased by individual preferences and may be subject to day-to-day variation. Taste and aroma compounds are often present in concentrations below the detection limit of near infrared (NIR) spectroscopy but the more abundant organic compounds offer potential for objective quality grading by this technique. Samples were drawn from one of Australia's major wine shows and from BRL Hardy's post-vintage wine quality allocation tastings. The samples were scanned in transmission mode with a FOSS NIR Systems 6500, over the wavelength range 400-2500 ㎚. Data analysis was performed with the Vision chemometrics package. With samples from the allocation tastings, the best correlations between NIR spectra and tasting data were obtained with dry red wines. These calibrations used loadings in the wavelengths related to anthocyanins, ethanol and possibly tannins. Anthocyanins are a group of compounds responsible for colour in red wines - restricting the wavelengths to those relating to anthocyanins produced calibrations of similar accuracy to those using the full wavelength range. This was particularly marked with Merlot, a variety that tends to have relatively lower anthocyanin levels than Cabernet Sauvignon and Shiraz. For dry white wines, calibrations appeared to be more dependent on ethanol characteristics of the spectrum, implying that quality correlated with fruit maturity. The correlations between NIR spectra and sensory data obtained using the wine show samples were less significant in general. This may be related to the fact that within most classes in the show, the samples may span vintages, glowing areas and winemaking styles, even though they may be made from only one grape variety. For dry red wines, the best calibrations were obtained with a class of Pinot Noir - a variety that tends to be produced in limited areas in Australia and would represent the least matrix variation. Good correlations were obtained with a tawny port class - these wines are sweet, fortified wines, that are aged for long periods in wooden barrels. During the ageing process Maillard browning compounds are formed and the water is lost through the barrels in preference to ethanol, producing “concentrated” darkly coloured wines with high alcohol content. These calibrations indicated heaviest loadings in the water regions of the spectrum, suggesting that “concentration” of the wines was important, whilst the visible and alcohol regions of the spectrum also featured as important factors. NIR calibrations based on sensory scores will always be difficult to obtain due to variation between individual winetasters. Nevertheless, these results warrant further investigation and may provide valuable Insight into the main parameters affecting wine quality.

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국내 육성 품종 '청향' 포도의 숙도별 양조 적성 연구 (Study on Wine Quality of Domestic Grape Cultivar 'Cheonghyang' classified by Ripening Stage)

  • 이효영;전진아;박영식;이재형;권혜정;정석태
    • 동아시아식생활학회지
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    • 제26권5호
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    • pp.445-449
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    • 2016
  • In this study, Red pearl (4x) and MBA (2x) were crossed Gangwon-do Agricultural Research and Extension Services in 2000 to compare the brewing characteristics of Cheonghyang, a seedless kind of grape registered in 2009, by maturity. Fruit characteristics of Cheonghyang were examined after the first racking and 300 days after fermentation during aging in manufacturing wine based on maturity categories of being immature, mature, and overmature after harvest between August 25 and 27, 2014. The soluble solid matter content did not differ between the first racking following manufacturing wine and during ripening, and the alcohol content following the first racking was 12.9% for immature ones, 13.0% for mature ones, and 12.7% for overmature ones., The alcohol content decreased by appropriately 1.3% to 1.8% during ripening. The total acidity content was 0.9% for immature ones, 0.8% for mature ones, and 0.5% for overmature ones following the first racking and showed insignificant variations during ripening of 0.8%, 0.7%, and 0.5%, respectively, with wine made from mature ones showing proper acidity. The volatile acid content following the first racking during ripening, showing insignificant variation by maturity; however, it decreased after ripening. The sensory evaluation detected differences in acidity of wine between mature and overmature grapes. There was no difference in sour taste between immature and mature grapes; however, overmature ones had low levels of sour taste. Our results showed that mature wine had the best overall preference.

복분자 술이 가토의 testosterone에 미치는 영향 연구 (Effects of Black Raspberry Wine on Testosterone Level of New Zealand White Rabbits)

  • 임채웅;정재명;최민준;이성일;이희곤;전병훈;백병걸
    • 동의생리병리학회지
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    • 제19권2호
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    • pp.375-379
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    • 2005
  • This study was conducted to investigate the effects of black raspberry wine, administered per os on testosterone levels in rabbits. Black raspberry wine containing 13% alcohol(v/v) was prepared from ripe fruits of Rubus coreanus fermented with Saccharomyces cervisiae. Experimental rats were divided into 2 groups(A and B) with 2 animals group: Group A received black raspberry wine. Group B received 13% concentrated alcohol('Soju') over a period of 6 weeks. all animals were monitored weekly for testosterone levels by radioimmunoassay using $^{125}I$ labeled anti-testosterone monospecific antibody. There was a significant(1.7-2.33 fold) increase in testosterone levels in Group A with a peak at 1 week post administration of black raspberry wine. There was no significant change in testosterone levels of rabbits in Group B. These data point to yet uncharacterized phytotestronegenic mechanisms of black raspberry wine that appear to be independent of ethyl alcohol. Further investigation of the mechanism of action of this fruit is warranted. These observations have potential implications for human reproductive health.

Structural and Physiological Characteristics of Rhamnogalacturonan II from Fruit Wines

  • Park, So-Yeon;Shin, Kwang-Soon
    • Food Science and Biotechnology
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    • 제16권2호
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    • pp.270-274
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    • 2007
  • To characterize the polysaccharides which exist as soluble forms in fruit wines, crude polysaccharides were isolated from red, white, raspberry, wild grape, and pear wine, respectively. Among them, the crude polysaccharide (RW-0) in red wine showed the highest yield and considerable amounts of thiobarbituric acid (TBA)-positive materials. The pectic polysaccharide RW-2 was purified to homogeneity from RW-0 by subsequent size-exclusion chromatography using Sephadex G-75 and its structure was characterized. RW-2 consisted of 14 different monosaccharides which included rarely observed sugars in general polysaccharides, such as 2-O-methyl-fucose, 2-O-methyl-xylose, apiose (Api), 3-C-carboxy-5-deoxy-L-xylose (aceric acid, AceA), 3-deoxy-D-manno-2-octulosonic acid (Kdo), and 3-deoxy-D-lyxo-2-heptulosaric acid (Dha). Methylation analysis indicated that RW-2 comprised at least 20 different glycosyl linkages such as 3,4-linked fucose, 2,3,4-linked rhamnose, 3'-linked apiose, and 2,3,3'-linked apiose, being characteristic in rhamnogalacturonan II (RG-II). High performance size-exclusion chromatography indicated that RW-2 mainly comprised RG-II of higher molecular weight (12,000), and that the changes of molecular weight to apparent 7,000 under less than pH 2.0 were observed. These analyses indicated that the higher molecular weight polysaccharide in RW-2 was mainly present as a RG-II dimer.

포도껍질의 제거 또는 첨가를 통한 국내산 포도주의 품질개선 (Quality Improvement of Wines Made from Domestic Grapes by the Elimination or Addition of Grape Skins)

  • 육철;장은미
    • 한국식품과학회지
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    • 제41권5호
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    • pp.528-535
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    • 2009
  • 국내산 적포도인 Campbell, MBA, Sheridan 세 품종의 포도를 각각 4가지 방식으로 나누어 처리를 하여 발효를 하였다. 첫 번째 시료는 포도를 제경하고 파쇄한 후 상법의 방법으로 발효시킨 적포도주(conventional), 두 번째는 포도껍질을 제거해서 발효시킨 포도주(skin removed), 세 번째는 상법의 적포도주 제조방식에 제거된 껍질을 추가로 첨가하여 발효시킨 포도주(skin added), 네 번째는 포도를 착즙하여 수율이 50% 되도록 착즙한 포도즙을 발효시킨 포도주(juice) 등 4가지 방식으로 포도주를 제조하였다. 발효과정 중 당도와 알코올 변화는 포도품종이나 처리방식에 따라 별 차이가 없었으나 색도에 있어서는 MBA가 가장 짙었고 Campbell, Sheridan 순으로 여려졌다. 처리 방법에 의해서는 포도의 품종에 관계없이 껍질을 제거하여 만든 포도주(skin removed)의 백색도(L값)가 가장 높았고 착즙액으로 제조한 포도주(juice), 상법에 의해 제조한 포도주(conventional), 껍질을 첨가하여 만든 포도주(skin added) 순으로 낮아졌고 폴리페놀 함량은 껍질을 제거해서 만든 포도주(skin removed)가 가장 낮았고 껍질을 첨가하여 만든 포도주(skin added)는 상법에 의해 제조한 포도주(conventional)에 비하여 30%이상 높게 나타났다. 관능검사 결과 dry-type(Campbell, MBA)에서는 껍질을 첨가해서 만든 포도주의 기호도가 상법에 의해 제조한 포도주에 비하여 높게 나타났으며 sweet-type(Sheridan)에서는 껍질을 제거해서 만든 포도주의 기호도가 크게 향상되었다.

효모의 종류를 달리한 캠벨 얼리 포도 발효주의 제조 (Wine Making using Campbell Early Grape with Different Yeasts)

  • 김경환;한기동
    • 한국미생물·생명공학회지
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    • 제39권1호
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    • pp.43-48
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    • 2011
  • 인천광역시 강화군에서 재배된 시판 효모의 종류를 달리한 캠벨 얼리 포도 발효주 5종류를 사용하여 전통 제조방법에 따른 캠벨 얼리 포도 발효주의 이화학적 및 관능적 특성을 비교하였다. 15일간의 발효과정 중 매일 시료를 채취하여 pH를 측정한 결과 pH는 3.0~3.3으로 큰 변화가 없었다. 산도는 0.4~0.9%로 유지되었으며, 당도는 발효주의 초기당이 24 Brix에서 발효 종료 시 6~7 Brix로 감소하였고, 알코올 함량은 발효 종료 시 13.2~14.4%로 나타났다. 특히, 발효 종료시 EC-1118의 알코올 함량이 다른 효모들에 비해서 많이 생성되었다. 그러므로 이화학적 특성을 비교해 볼 때 효모 EC-1118이 알코올 생성 능력이 뛰어나므로 산업화에도 적합하리라고 본다. 색도분석 결과 L값은 black과 white 사이의 다양한 값이 나타났고, a값은 red 계열에 가깝게 나타났으며, b값은 blue와 yellow 사이의 다양한 값이 나타났다. 폴리페놀 함량은 1000 ppm 전후로 나타났으며, 관능평가결과 전체적인 기호도는 효모 EC-1118이 가장 높았으며, Fermivin은 색을 제외한 나머지 기호도에서 전체적으로 가장 낮은 기호도를 보였다. 관능적 특성을 비교했을 때 색상, 향, 맛, 목넘김, 후미, 종합적 기호도 등 모든 부분에서 효모 EC-1118이 가장 높은 평가를 받았다. 위와 같은 연구결과로 볼 때 이화학적 특성과 관능적 특성에서 효모 EC-1118이 캠벨얼리 포도주에 가장 적합한 효모인 것으로 판단된다. 이러한 결과가 포도주 산업과 연계된다면 더 좋은 제품이 나올 것으로 생각된다.

건조 오미자에서 분리된 야생 효모로 와인 제조 및 알코올 발효 시 영양요구성 조사 (Preparation of Wine Using Wild Yeast from Dried Omija and Optimal Nutritional Requirements for Alcoholic Fermentation)

  • 모혜원;정지숙;최상원;최경호
    • 한국식품영양과학회지
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    • 제41권2호
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    • pp.254-260
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    • 2012
  • 본 연구는 건조 오미자 추출액을 이용하여 오미자와인을 발효하였다. 건조 오미자를 YM배지에 분주하고 반복 배양하여 알코올 발효효모 OM-1 및 OM-2를 분리하였다. 분리균은 $10^{\circ}Brix$로 보당한 오미자 추출액배지에서 10% 이상의 알코올을 생성하였으며, OM-2로 발효한 오미자와인의 관능적 특성이 OM-1으로 발효한 와인보다 우수한 것으로 평가되었다. 분리균 OM-2는 0.1% urea, 0.02% mineral mixture를 첨가한 오미자 추출액배지에서 균체증식이 유의적으로 촉진되었으며 vitamin mixture는 urea가 첨가된 경우에만 약간의 증식촉진 효과를 나타내었다.

전통적 탁주증자법으로 처리한 홍삼의 일부 항산화 및 항암효과 (Antioxidant and Anticancer Activities of Ginseng Treated with Traditional Rice Wine Steam Process Method)

  • 예은주;김수정;박창호;배만종
    • 한국식품영양과학회지
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    • 제34권5호
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    • pp.599-604
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    • 2005
  • 본 연구는 인삼의 가공방법을 개발하고 제품을 다양화하기 위해 우리나라의 전통주인 탁주로 인삼을 증자한 후 홍삼의 항산화성 및 아질산염 소거능, 항암효과를 비교 연구하였다. $A1\~~A9$시료의 $60\%$ 에탄올 추출물에서의 DPPH 라디칼 소거효과는 1,000 ppm에서 인삼의 증자 횟수와 비례하여 증가하였고, 특히 A3에서 $79.5{\pm}3.3\%$로 라디칼 소거율이 뚜렷하게 증가함을 보였다. 아질산염 소거능은 pH 1.2에서 W.G는 $25.9{\pm}4.4\%$, R.G는 $12.9{\pm}1.1\%$, $A1\~A9$$26.2{\pm}0.1\~56.1{\pm}0.5\%$로 증자 횟수가 증가할수록 높은 아질산염 소거능을 나타냈다. 인체유래 간암세포(Hep3B)에서의 항암효과로 실험에서 W.G는 에탄올 추출물 5,000 ppm으로 처리했을 때, $19.6{\pm}4.5\%$로 나타나 증식 억제율이 미미하였으나, R.G는 에탄을 추출물 5,000 ppm으로 처리했을 때 $54.5{\pm}6.1\%$를 나타냈으며, A9에서는 $96.3{\pm}2.4\%$로 높은 항암효과 가 관찰되었다. 이상의 결과로 볼 때 탁주를 이용한 증자홍삼이 일반 홍삼 및 백삼보다 본 실험의 항산화 및 항암 system(in vitro)을 이용하여 실험한 결과 더 높은 항암 및 항산화 효과를 나타내었다.

A Study of the Costumes and Make-up in the Movie "Anna Karenina"

  • Jung, Jeewon;Kim, Eunsil
    • 패션비즈니스
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    • 제19권3호
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    • pp.14-30
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    • 2015
  • The purpose of this study is to establish how main characters' mental states are expressed through costumes and makeup by understanding and analyzing the relationship between the costumes and the makeup in the movie "Anna Karenina" and to compare the 19th century Russian costumes. The study methods are a literature review and an empirical case study. The results are as follows. First, the costumes in "Anna Karenina" are a mixture of late crinoline and early bustle style in general. However, the costumes were altered after the actress's movements and acting were considered. Regarding colors, Anna wears a lavender robe as the virtuous wife, a wine-colored robe for love and death, and a white robe for innocence, thus reflecting her mental states; through the colors, her changes of mental state are expressed. Second, the costumes of Alexei Vronsky, are similar in style and colors to those of mid-late 19th century Russian military uniforms. White, blue and black costume colors are used to describe his situations and emotional changes. Third, Alexei Karenin wears 19th century costumes of dark and achromatic colors without decorations, representing his conservative, authoritative character. However, he showshis rage with a wine and red-colored costume at the end of the movie. Fourth, regarding the makeup in the movie, Anna wears makeup of a soft pink-gold color influenced by 19th century naturalism. Male characters express their characteristics with their beards and hair styles. Vronsky's Hollywood mustaches and wavy blonde hair show his charm, and Karenin's chin curtain beard and bald head reveal his conservative character. The costumes of the three main characters in the movie are not very different from 19th century style in general, but mental states and situations are expressed through accessories, and colors maximize all of the effects. Through this research, it is illustrated that the costumes and makeup in a movie can not only express characters' emotional changes but also show the relationships between the characters in different scenes.

고려시대의 원예식품류에 관한 연구 (A Study on Horticulture Foods in Kory$\v{o}$ Era)

  • 강춘기
    • 한국식품영양학회지
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    • 제3권1호
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    • pp.69-79
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    • 1990
  • Koryo(918-1352) made a certain progress in her culture and agriculture except the latter part of the era when the development in social economy were retarded due to military dictatorship and Mongol invasion. Despite of these external conditions, cultivations and kinds of horticulture foods were expanded With the help Of many king's agriculture first policy and the advancement in cultivating method . Among the horticulture foods, fruits such as peach, plum, Japanese apricot, apricot, cherry, pear, persimmon, pomegranate, crab apple, Jujube, grape, Chinese quince, walnut, orange, yuzu, chestnut, ginkgo nut(silvernut), pine nut, nutmeg nut, and fiat were crowed, and vegetables such as Chinese cabbage, turnip, radish, garlic, welsh onion, gynmigit, scallion, taro, malva, cucumber, white gourd, bottle gourd, water melon, eggplant, Japanese ginger, ginger and litchi were cultivated, while semi, water shieled and bamboo sprouts were taken in natural. Fruits were taken in natural or through dry, and particularly grapes were used to make wine, Flowers of Japanese apricots, some fruit trees, and chrysanthemum were also made into wine. Certain fruits were used as medicine owing to its medicinal nature. Vegetables were used to make Kimchi or to boil soup, sometimes they were dried to be kept in storage to be used in rare season and also used as medicine Increase in kinds of horticulture foods does not have any direct relation with the reform of social economy, but the fact that so many kinds of horticulture foods were cultivated and used in Koryo era shows that they elevated people's life and dietary culture.

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