• 한국유가공학회:학술대회논문집
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• 한국유가공기술과학회 2002년도 제54회 춘계심포지움 - 우유와 국민건강
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• pp.59-60
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• 2002

Edible films such as wax coatings, sugar and chocolate covers, and sausage casings, have been used in food applications for years$^{(1)}$ However, interest in edible films and biodegradable polymers has been renewed due to concerns about the environment, a need to reduce the quantity of disposable packaging, and demand by the consumer for higher quality food products. Edible films can function as secondary packaging materials to enhance food quality and reduce the amount of traditional packaging needed. For example, edible films can serve to enhance food quality by acting as moisture and gas barriers, thus, providing protection to a food product after the primary packaging is opened. Edible films are not meant to replace synthetic packaging materials; instead, they provide the potential as food packagings where traditional synthetic or biodegradable plastics cannot function. For instance, edible films can be used as convenient soluble pouches containing single-servings for products such as instant noodles and soup/seasoning combination. In the food industry, they can be used as ingredient delivery systems for delivering pre-measured ingredients during processing. Edible films also can provide the food processors with a variety of new opportunities for product development and processing. Depends on materials of edible films, they also can be sources of nutritional supplements. Especially, whey proteins have excellent amino acid balance while some edible films resources lack adequate amount of certain amino acids, for example, soy protein is low in methionine and wheat flour is low in lysine$^{(2)}$. Whey proteins have a surplus of the essential amino acid lysine, threonine, methionine and isoleucine. Thus, the idea of using whey protein-based films to individually pack cereal products, which often deficient in these amino acids, become very attractive$^{(3)}$. Whey is a by-product of cheese manufacturing and much of annual production is not utilized$^{(4)}$. Development of edible films from whey protein is one of the ways to recover whey from dairy industry waste. Whey proteins as raw materials of film production can be obtained at inexpensive cost. I hypothesize that it is possible to make whey protein-based edible films with improved moisture barrier properties without significantly altering other properties by producing whey protein/lipid emulsion films and these films will be suitable far food applications. The fellowing are the specific otjectives of this research: 1. Develop whey protein/lipid emulsion edible films and determine their microstructures, barrier (moisture and oxygen) and mechanical (tensile strength and elongation) properties. 2. Study the nature of interactions involved in the formation and stability of the films. 3. Investigate thermal properties, heat sealability, and sealing properties of the films. 4. Demonstrate suitability of their application in foods as packaging materials. Methodologies were developed to produce edible films from whey protein isolate (WPI) and concentrate (WPC), and film-forming procedure was optimized. Lipids, butter fat (BF) and candelilla wax (CW), were added into film-forming solutions to produce whey protein/lipid emulsion edible films. Significant reduction in water vapor and oxygen permeabilities of the films could be achieved upon addition of BF and CW. Mechanical properties were also influenced by the lipid type. Microstructures of the films accounted for the differences in their barrier and mechanical properties. Studies with bond-dissociating agents indicated that disulfide and hydrogen bonds, cooperatively, were the primary forces involved in the formation and stability of whey protein/lipid emulsion films. Contribution of hydrophobic interactions was secondary. Thermal properties of the films were studied using differential scanning calorimetry, and the results were used to optimize heat-sealing conditions for the films. Electron spectroscopy for chemical analysis (ESCA) was used to study the nature of the interfacial interaction of sealed films. All films were heat sealable and showed good seal strengths while the plasticizer type influenced optimum heat-sealing temperatures of the films, 130$^{\circ}$C for sorbitol-plasticized WPI films and 110$^{\circ}$C for glycerol-plasticized WPI films. ESCA spectra showed that the main interactions responsible for the heat-sealed joint of whey protein-based edible films were hydrogen bonds and covalent bonds involving C-0-H and N-C components. Finally, solubility in water, moisture contents, moisture sorption isotherms and sensory attributes (using a trained sensory panel) of the films were determined. Solubility was influenced primarily by the plasticizer in the films, and the higher the plasticizer content, the greater was the solubility of the films in water. Moisture contents of the films showed a strong relationship with moisture sorption isotherm properties of the films. Lower moisture content of the films resulted in lower equilibrium moisture contents at all aw levels. Sensory evaluation of the films revealed that no distinctive odor existed in WPI films. All films tested showed slight sweetness and adhesiveness. Films with lipids were scored as being opaque while films without lipids were scored to be clear. Whey protein/lipid emulsion edible films may be suitable for packaging of powder mix and should be suitable for packaging of non-hygroscopic foods$^{(5,6,7,8,)}$.

• 한국축산식품학회지
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• 제29권4호
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• pp.475-481
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• 2009

본 연구는 밀 식이섬유(Wheat fiber)와 분리대두단백(Isolated soybean protein)을 첨가한 프랑크푸르터의 이화학적 및 관능적 특성에 미치는 영향을 조사하였다. 밀 식이섬유와 분리대두단백의 첨가는 pH의 변화에 영향을 주지 않았으며, 최종제품에 있어 명도의 증가를 가져왔다. 2% 밀 식이섬유 처리구는 다른 처리구들과 유의적 차이가 없었으나 대조구에 비해 가열감량의 감소와 유화안정성의 향상을 보였으며, 특히 경도, 응집성 및 검성에서 유의적인 향상을 나타냈다. 관능적 특성에서 2% 밀 식이섬유를 첨가한 처리구는 대조구에 비하여 풍미, 다즙성, 전체적인 기호도의 향상을 보였다(p<0.05). 본 연구결과, 밀식이섬유는 분리대두단백과 비교하여 유사하거나 우수한 이화학적 및 관능적 특성을 보였으며, 따라서 밀 식이섬유는 분리대두단백의 대체재로서 활용성이 높다고 사료된다.

• 한국식품과학회지
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• 제48권4호
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• pp.372-377
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• 2016

본 실험의 목적은 고추씨 분말의 첨가량이 닭다리살 프랑크푸르트 소시지의 품질 특성에 미치는 영향을 연구하고자 하는데 있다. 실험 결과 수분의 함량은 1.5% 처리구에서 다른 실험구 보다 유의적으로 높은 값을 나타냈으며(p<0.05), 반면에 단백질 함량과 지방 함량은 고추씨 분말의 첨가량의 증가에 따라 감소하는 경향을 보였다. 회분 함량은 수분의 함량과 비례하여 1.5% 처리구에서 가장 높은 값을 나타내었다. 가열수율은 고추씨 분말의 첨가량이 증가함에 따라 상승하는 추세를 보였다. 겉보기 점도의 평균은 고추씨 분말 첨가량의 증가 따라 증가하는 결과를 보였다. 색도는 고추씨의 첨가량의 증가에 따라 적색도와 황색도의 값이 높게 측정되었으며, 가열 전, 가열 후 pH는 소시지에 첨가되는 고추씨 분말의 함량이 증가함에 따라 감소하는 경향을 나타내었다. TPA에서는 모든 항목에서 대조구와 처리구간의 유의적인 차이를 보이지 않았으며(p>0.05), 관능 평가에서는 고추씨 분말 1.5% 처리구가 모든 평가에서 좋은 점수를 받은 것으로 보아 대조구와 처리구간의 기계적 물성의 차이는 크게 나타나지 않았으나 관능적으로 우수함을 알 수 있었다. 따라서 실험 결과를 토대로 닭다리살 프랑크푸르트 소시지에 고추씨 분말을 첨가하여 품질 특성을 연구한 결과 1.5%의 고추씨 분말을 첨가한 소시지가 이화학적으로 가장 우수한 성적을 보였으며 관능적으로도 뛰어난 소시지를 제조할 수 있을 것으로 생각된다.

• 한국축산식품학회지
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• 제34권3호
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• pp.378-386
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• 2014

This study was conducted to determine the effects of red and green glasswort on the physicochemical and textural properties of reduced-salt cooked sausages. The control was formulated with 1.5% NaCl; then, three reduced-salt treatments were prepared, with 0.75% NaCl (RS), 0.75% NaCl+1.0% red glasswort (RSR) and 0.75% NaCl+1.0% green glasswort (RSG), respectively. The addition of glasswort within the added amount of 1% had no influence on the pH value of the reduced-salt cooked sausages, regardless of the glasswort type. In terms of color, RSG treatment conveyed a higher hue angle value than the RSR treatment (p<0.05). Increases in the protein solubility (total and myofibrillar proteins) and apparent viscosity of reduced-salt meat batter that were due to the addition of glasswort were observed; however, there were no differences according to the type of glasswort (p>0.05). Furthermore, the addition of glasswort, regardless of its type, resulted in decreased cooking loss, and increased emulsion stability. As a result, reduced-salt cooked sausages formulated with either red or green glasswort demonstrated similar textural properties to those of the control. In conclusion, the type of glasswort within an added amount of 1% had no influence on the physicochemical and textural properties of reduced-salt cooked sausages, except for the color characteristics. In terms of color alteration by the addition of glasswort, the red glasswort, which in comparison with the green glasswort could minimize the color changes of reduced-salt cooked sausages, might be an effective source for manufacturing meat products.

• 농업생명과학연구
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• 제53권3호
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• pp.41-49
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• 2019

육제품에 사용되는 합성 항산화제를 대체할 천연물질에 관한 관심이 높아지고 있다. 본 연구는 냉장저장 중 아스타잔틴(AX)의 첨가가 유화형소시지의 산화 안정성 및 품질 특성에 미치는 영향을 조사하기 위해 무첨가구인 대조구, 500 mg/kg BHT (Butylated hydroxytoluene), 및 80 mg/kg AX으로 처리하였다. AX의 첨가는 유화형소시지의 pH, 유화 안정성 및 가열 수율에 유의적인 영향을 미치지 않았다(p>0.05). 그러나 육색의 경우 아스타잔틴 첨가구의 초기(day 1) 색상유지력은 합성 항산화제인 BHT와 동일하였고, 적색도는 높게 나타났다(p<0.05). 항산화 능력에서, 처리구간 단백질 산화는 유의적인 차이가 없었다. 지질 산화의 경우 저장 종료시(day 14) BHT 처리구에서 가장 낮은 값을 나타냈으나 AX 첨가구 또한 무 첨가구인 대조구보다 매우 낮게 나타났다(p<0.05). 한편, 경도는 저장 초기에 비해 저장 종료시 BHT와 AX 처리구들에서 대조구에 비해 낮게 나타났다(p<0.05). 그러므로 천연물질인 아스타잔틴은 기존에 사용되는 합성 항산화제인 BHT를 대체하여 항산화제의 역할뿐만 아니라 육제품의 색상 증진제로도 활용 가능할 것으로 판단된다.