• Title/Summary/Keyword: physico-chemical and sensory properties

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Physico-chemical properties of whole sweetpotatoes on precooking and frozen storage (고구마의 가열방법과 저장성에 따른 이화학적 성질)

  • Kum, Jun-Seok
    • Applied Biological Chemistry
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    • v.37 no.2
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    • pp.77-84
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    • 1994
  • Sweetpotatoes were baked (BK), microwaved (MW), microwaved/baked (MWBK), and microwaved/hold/microwaved (MWHO). Sugars, Huntercolors, compression and shear forces, sensory scores, moisture content, starch, and alcohol insoluble solids (AIS) were determined for each treatment. The BK roots contained higher (p<0.05) amount of sugars and less (p<0.05) starch. The MW roots contained higher (p<0.05) amount of starch, AIS, and less (p<0.05) sugar. The BK product resulted in the least (p<0.05) compression and shear forces needed to break it. The MW product demanded the greatest (p<0.05) force. The MWHO showed very similar results to the BK. Sensory scores for the BK and the MWHO sweetpotatoes were very acceptable. In color scores, the MWHO products were very acceptable and similar to the BK in flavor.

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Efficacy of Flaxseed Flour as Bind Enhancing Agent on the Quality of Extended Restructured Mutton Chops

  • Sharma, Heena;Sharma, Brahma Deo;Mendiratta, S.K.;Talukder, Suman;Ramasamy, Giriprasad
    • Asian-Australasian Journal of Animal Sciences
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    • v.27 no.2
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    • pp.247-255
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    • 2014
  • Consumers have become very conscious about their nutrition and well being due to changes in their socio-economic lifestyle and rapid urbanization. Therefore, development of technology for production of low cost and functional meat products is urgently required. One such approach is innovative restructuring technology in which binding of meat pieces still remains the main challenge and extension of product is generally associated with poor binding and texture. Thus, the present study was envisaged as an attempt to solve this problem by the incorporation of flaxseed flour (FF) as bind enhancing agent. The FF was used at three different levels viz., 0.5%, 1%, and 1.5% to replace lean meat in pre-standardized restructured mutton chops formulation. The products were subjected to analysis for physico-chemical, sensory and textural properties. Cooking yield, moisture percentage and fat percentage increased with increase in the level of incorporation of FF, however, protein percent and pH decreased with increase in the level of incorporation. Shear force value of product incorporated with 1.5% FF was significantly higher (p<0.01) than control and product containing 0.5% FF level. Among the sensory attributes, product with 1% flaxseed flour showed significantly higher values (p<0.05) for general appearance, binding, texture and overall acceptability. Hardness showed significant increasing (p<0.01) values with increasing levels of incorporation of flaxseed flour, however all other parameters of texture profile analysis showed a decreasing trend. On the basis of sensory scores and physico-chemical properties, the optimum incorporation level of FF was adjudged as 1%. Products incorporated with optimum level of flaxseed flour (1%) were also assessed for water activity and microbiological quality during the storage period of 15 days. It was found that the extended restructured product could be safely stored under refrigeration ($4^{\circ}C{\pm}1^{\circ}C$) in low density polyethylene (LDPE) pouches for 15 days without marked deterioration in sensory and microbiological quality. Thus, it was concluded that flaxseed flour can be used as a good bind enhancing agent in extended restructured meat products at an economic cost.

Studies on the Physico-chemical Properties and Sensory Evaluation of Pickled Quail Egg (메추리알 초란의 이화학적 특성과 기호성 평가)

  • Yang Cheul-Young
    • Food Science of Animal Resources
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    • v.25 no.4
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    • pp.472-477
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    • 2005
  • This experiment was studied to investigate the physico-chemical properties and sensory evaluation in pickled quail egg during storage at 10 and $20^{\circ}C$ for storage periods 15 days. The weight change of the pickled quail egg were saw a big increase rate with the pickle during 10 days later, and the during storage at $20^{\circ}C$ were increased than the during storage at $10^{\circ}C$. Moisture, crude protein, crude fat and crude ash content of quail egg were 75.24, 12.13, 9.53 and $1.20\%$ respectively. The pH were showed increase pattern for pickle storage periods on 5 days at $10^{\circ}C$. Water soluble nitrogen of quail egg white saw decreased with during the pickle peroids at 10 and 15 days, and the non-protein nitrogen saw increased with according to pickle periods. The change of the viscosity by a rotation viscometer measurement saw increased with according to pickle period days. and the viscosity values saw increased on pickle periods at 5 days. The result of sensory evaluation of sample was S-3>S-2>S-1, in order.

Physico-chemical Properties of Boxthorn(Lycii fructus) Hot Water Extracts by Roasting Conditions (볶음 조건에 따른 구기자 열수 추출물의 이화학적 특성)

  • Lee, Boo-Yong;Kim, Eun-Jeong;Choi, Hee-Don;Kim, Yoon-Sook;Kim, In-Hwan;Kim, Sung-Soo
    • Korean Journal of Food Science and Technology
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    • v.27 no.5
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    • pp.768-772
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    • 1995
  • The physico-chemical properties of hot-water extracts of dried and roasted Boxthorn(Lycii fructus) were investigated. The proximate composition of dried Boxthorn was 17.5% moisture, 5.4% ash, 14.7% lipid, 18.9% protein, 11.8% fiber and 31.7% carbohydrate. As the roasting temperature and time increased, water soluble solids, turbidity, titrable acidity and redness of the hot water extracts were increased, while the free sugar content was reduced. The linoleic acid of roasted Boxthorn decreased and palmitic acid increased at higher roasting temperature. The sensory properties of sweet odor, burnt odor, sour taste, burnt taste and tannic taste of the hot water extract were scored higher and sweet and roasted taste were lower as the roasting temperature and time increased.

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Development of Saengshik Beverage Products and Their Physico-chemical Properties (생식 음료 개발 및 이화학적 특성)

  • Lee, Ju-Yeon;Mok, Chulkyoon
    • Food Engineering Progress
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    • v.13 no.4
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    • pp.341-347
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    • 2009
  • Saengshik beverage products were developed to improve the convenience in consumption, and thereby to expand the Saengshik market. Beverages were prepared from 3 commercial Saengshik products (ES, BS, SS) by mixing with water using a high shear blender. The physicochemical and sensory properties of the Saengshik beverage product were compared. The most acceptable beverage product was made of BS at 7.7% (w/w) level. The apparent viscosity of the beverages increased as the Saengshik levels increased. The beverages at lower Saengshik levels showed dilatant fluid characteristics, while they were Newtonian and pseudoplastic fluids at middle and high Saengshik levels, respectively. The beverage products also showed rheopectic type time-dependency at middle (5.7-9.7%) Saengshik levels, while they were time independent at low and high levels.

A Study on Rheology of the Rib-eye Cooked by Cooking Method and Cooking Utensil (Rib-eye의 조리기구 및 조리방법에 따른 물성 연구)

  • 박진수;최민경
    • Korean Journal of Human Ecology
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    • v.7 no.1
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    • pp.21-31
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    • 2004
  • This study was carried out to investigate the physico-chemical properties during the rib-eye preperation while cooked rib-eye and fine sensory evaluation by various cooked utensil (oven, fry-pan and microwave). 1) Change of moisture contents of sauce-pan boiling cooker was lower than boiling by preasure cooker and fat content of sauce-pan boiling was higher than preasure cooker boiling. 2) Degree of cholesterol of cooker meat was not change for content of cholesterol during the boiling preperation but progressively decreased in order of well-done steak < medium steak < rare steak measured by cholesterol analysis. 3) Sensory evaluation conducted by fine graduate as panelists showed that oven steak and fry-pan steak had higher score of sensory evaluation. While microwave steak had the lowest score all sensory profile score.

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A Comparison of Fattening Performance, Physico-Chemical Properties of Breast Meat, Vaccine Titers in Cross Bred Meat Type Hybrid Chicks Fed Sulfur (유황을 급여한 육용 교잡계의 성장능력과 계육의 물리.화학적인 성상의 비교)

  • 박재홍;류명선;이영은;송근섭;류경선
    • Korean Journal of Poultry Science
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    • v.30 no.3
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    • pp.211-217
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    • 2003
  • A study was conducted to investigate the fattening performance, physico-chemical properties of breast meat, vaccine titers in cross bred meat type hybrid chicks fed organic sulfur. Total three hundred and sixty chicks of eight weeks old were replaced in individual cage from 8 to 10 weeks old. Four levels of organic sulfur (0, 1.0, 2.0, 4.0%) containing 45% sulfur were added into basal diet containing CP 19% and ME 2,950 kcal/kg. Weight gain, feed intake, fred conversion were weekly measured. The proximate composition, physico-chemical properties of breast meat, vaccine titer and sensory characteristics were examined at the end of experiment. Weight gain, feed intake and feed conversion of birds fed organic sulfur were not statistically different with control. There were no significant difference in feed intake and feed conversion. However, abdominal fat(%) of birds fed organic sulfur tended to increase compared with control. Crude fat of breast meat decreased significantly in organic sulfur treatments(P<0.05). The red color of breast meat seemed to increase but was not statistically different among the treatments. Cooking loss showed decrements significantly in organic sulfur treatments(P<0.05). Mechanical Hardness, cohesiveness and springiness were prone to be high and gumminess greatly high in breast meat of birds fed organic sulfur addition compared with control. Juiciness tended to increase and greasiness decreased(P<0.05) in organic sulfur treatments by the sensory evaluation. The overall acceptability of the breast meat was the highest at 2.0% organic sulfur added chicks(P<0.01). There were no different blood cholesterol, AST, ALT and BUN.

Effects of Sodium Chloride, Potassium Chloride, Potassium Lactate and Calcium Ascorbate on the Physico-chemical Properties and Sensory Characteristics of Sodium-reduced Pork Patties (NaCl, KCl, Potassium Lactate와 Calcium Ascorbate의 첨가가 저장 중 저염 돈육 패티의 이화학적 특성과 관능 특성에 미치는 영향)

  • Moon, Sung-Sil;Kim, Young-Tae;Jin, Sang-Keun;Kim, Il-Suk
    • Food Science of Animal Resources
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    • v.28 no.5
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    • pp.567-573
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    • 2008
  • This study investigated the effects of sodium chloride, potassium chloride, potassium lactate and calcium ascorbate on the physico-chemical and sensory characteristics of sodium-reduced pork patties. Pork patties were prepared in 4 ways: T1 (control, 1.0% NaCl), T2 (0.6% NaCl, 0.4% KCl), T3 (0.7% NaCl, 0.3% potassium lactate) and T4 (0.7% NaCl, 0.3% calcium ascorbate). The pH, cooking loss, total plate counts, TBARS (2-thiobarbituric acid reactive substances), surface color (L, a, b) and sensory characteristics were evaluated. The partial substitution of NaCl with KCl and calcium ascorbate decreased the cooking loss and TBARS values, and enhanced microbial stability. The partial substitution of NaCl with potassium lactate significantly decreased TBARS values and enhanced microbial stability, but significantly increased cooking loss compared to the control after 1 and 4 days of storage. However, the surface color and sensory characteristics were not affected by any of the treatments.

Studies on Physico-chemical Properties of Chicken Meat Cooked in Electric Oven Combined with Superheated Steam (전기오븐에서 과열증기주입에 따른 열처리가 닭고기의 이화학적 특성변화에 미치는 영향)

  • Chun, Ji-Yeon;Kwon, Bong-Gu;Lee, Su-Hyun;Min, Sang-Gi;Hong, Geun-Pyo
    • Food Science of Animal Resources
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    • v.33 no.1
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    • pp.103-108
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    • 2013
  • This study was carried out to observe the effect of superheated steam combined with oven heating on the physico-chemical and sensory properties of chicken meat. Specially, chicken breasts and thighs were heated for 40 min in various heating formulations such as oven heating, superheated steam heating or a combination of two kinds of heating. In the physical properties measurement, the shear force was increased as superheated steam heating time and chicken thighs were higher than chicken breasts in all treatments (p<0.05). The highest level of water holding capacity was solely superheated steam treated chicken for 40 min (p<0.05). The $L^*$ value was decreased but $a^*$ value or $b^*$ value were increased after cooking. Chicken breast exhibited a higher colour value than chicken thigh. Superheated heating was effective to reduce heating loss as 22.64% (p<0.05). However, pH was not different depending on the heating formulation or part of the chicken meat (p>0.05). In the sensory test, the combination of 10 min oven heating and 30 min superheated steam heating was effective to create a good flavour of chicken meat. In this study, an optimum formulation was developed which was a combination of 10 min oven heating and 30 min superheated steam heating. It was more effective to improve the quality of chicken meat than the single heat treatment of chicken meat.