• Asian-Australasian Journal of Animal Sciences
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• 제33권2호
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• pp.332-338
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• 2020

Objective: Aim of this study was to evaluate the influence of freeze-dried acid whey addition and the use a game meat (fallow deer) on a microbial content and the biogenic amines formation in dry fermented sausages. Methods: The experiment involved dry fermented sausages made in two variants from beef and from fallow deer. Each variant was divided into five groups: control (with a curing mixture), reference (with a sea salt), sample with a liquid acid whey and two samples with the addition of reconstituted freeze-dried acid whey in different concentrations. Changes in lactic acid bacteria (LAB), Enterobacteriaceae content and biogenic amines content were determined. Results: The microbial content changes suggest that addition of acid whey slightly affected LAB content in comparison with the control and reference sample, but the addition of freezedried acid whey resulted in a reduction of Enterobacteriaceae content in the sausages from fallow deer or a similar level in the beef sausages compared with the control and reference sample. Both changes in LAB and Enterobacteriaceae content were more evident in case of sausages made from fallow deer. Addition of acid whey (liquid and a higher amount of freezedried) and use of fallow deer meat to produce the sausages resulted in a significant reduction of total biogenic amines content. Conclusion: The addition of acid whey (liquid and higher amount of freeze-dried) resulted in a significant reduction of total biogenic amines content in dry fermented sausages made from fallow deer meat.

• Asian-Australasian Journal of Animal Sciences
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• 제19권6호
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• pp.905-908
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• 2006

The purpose of this research was to study the effects of kefir whey (kefir whey, peptides, lactic acid) on skin care properties including skin lightening effect and acne treatment. The final aim was to develop a new cosmetic product and enhance the value of dairy products. The results of skin lightening tests showed that all three kefir whey components (kefir whey, peptides and lactic acid) had inhibitory ability against melanin synthesis. Furthermore, copper chelating analysis demonstrated that both kefir whey and kefir whey peptides could chelate the copper in tyrosinase, which might explain the mechanism of inhibition. The ability for acne treatment indicated that lactic acid level higher than 60 mg/ml could inhibit the growth of Propionibacterium acne, whereas no inhibition was found with other components.

• 한국조리학회지
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• 제13권1호
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• pp.55-61
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• 2007

L. acidophilus KCCM 32820과 P. freudenreichii KCCM 31227의 성장곡선 및 5%와 10% 유청 배지를 고압증기멸균 및 저온살균하여 L. acidophilus KCCM 32820과 P. freudenreichii KCCM 31227을 혼합배양시 생성되는 propionic acid와 acetic acid 양을 측정하였다. L. acidophilus KCCM 32820의 대수기는 $6\sim21$시간, P. freudenreichii KCCM 31227의 대수기는 $36\sim108$시간으로 나타났다. 혼합배양시 propionic acid의 생성량은 5% 유청 배지보다는 10% 유청 배지에서, 고압증기 멸균보다는 저온살균에서 많은 양이 생성되었다. Propionic acid의 최대 생산량은 10% 유청 배지를 저온살균하였을 때 배양 120시간에 7.88 mg/mL이었다. Acetic acid도 5%보다는 10% 유청 배지에서 높은 생성량을 나타냈고 그 생성량은 배양시간이 경과함에 따라 propionic acid 생성량의 $2:1\sim3:1$이었다.

• 한국생물공학회:학술대회논문집
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• 한국생물공학회 2005년도 생물공학의 동향(XVI)
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• pp.181-185
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• 2005

We investigated the fermentative production of lactic acid from cheese whey and corn steep liquor as cheap raw materials using Lactobacillus sp. RKY2 to reduce the manufacturing cost of lactic acid. Lactic acid yields were obtained at more than 0.98 g/g from medium containing whey lactose. Lactic aid productivities and yields obtained from whey lactose were slightly higher than those obtained from pure lactose. The final concentration of lactic acid increased with increase, in whey lactose concentration, whereas the lactic acid productivity decreased probably due to substrate inhibition. The fermentation efficiencies were improved by addition of more corn steep liquor to the medium.

• Journal of Dairy Science and Biotechnology
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• 제41권1호
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• pp.34-43
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• 2023

Hydrolysis of whey-derived proteins using lactic acid bacteria (LAB) utilizes the mass culture method and fermentation of LAB to produce effective bioactive peptides. Whey protein has the biological potential of its precursors, but the active fragments may not be released depending on the hydrolysis method. As an alternative to these problems, the nutritional and bioactive functionality of the hydrolysis method have been reported to be improved using LAB for whey protein. Peptide fractions were obtained using a sample fast protein liquid chromatography device. Antioxidant activity was verified for each of the five fractions obtained. In vitro cell experiments showed no cytotoxicity and inhibited nitric oxide production. Cytokine (IL [interleukin]-1α, IL-6, tumor necrosis factor-α) production was significantly lower than that of lipopolysaccharides (+). As a result of checking the amino acid content ratio of the fractions selected through the AccQ-Tag system, 17 types of amino acids were identified, and the content of isoleucine, an essential amino acid, was the highest. These properties show their applicability for the production of functional products utilizing dietary supplements and milk. It can be presented as an efficient method in terms of product functionality in the production of uniform-quality whey-derived peptides.

• 한국축산식품학회지
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• 제30권3호
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• pp.458-465
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• 2010

유청농도 12% 용액에 Lactobacillus helveticus ATCC 55163과 Propionibacterium acidipropionici 5020을 혼합 배양하여 프로피온산, 초산, 젖산 등이 생성된 유청발효물을 빵 제조 시 물의 10%, 15% 대체하여 제조한 빵의 부피, pH 및 총산도, 수분함량, 수분활성도, 조직감, 유기산, 관능검사 등을 분석하였다. 부피는 대조구가 가장 컸고, pH 및 총산도에서 pH는 대조구가 가장 낮았고 총산도는 대조구가 가장 높았다. 수분은 유청발효물 함량에 따라 차이가 없었고 수분활성도는 저장기간이 길어질수록 유청발효물 10% 첨가한 것에서 가장 높았다. 조직감은 저장기간이 길어질수록 유청발효물 10% 첨가한 것의 경도 (hardness)가 가장 낮아 부드러웠다. 유기산 함량 분석에서 대조구에서는 프로피온산이 검출되지 않았고, 호박산 젖산 초산 등도 시험구보다 낮게 검출되었다. 시험구 중에는 유청발효물을 15% 첨가한 것에서 호박산, 초산, 젖산 등이 높게 검출되었고 특히 프로피온산 검출량이 높았다. 관능검사에서 유청발효물을 10% 첨가한 것이 가장 높은 점수를 얻었다. 제품의 품질 면에서 유청발효물 10%, 보존성 면에서 유청발효물 15%를 첨가하는 것이 효과가 있을 것으로 기대된다.

• Applied Biological Chemistry
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• 제50권1호
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• pp.6-11
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• 2007

P. freudenreichii KCCM 31227을 whey 배지에서 배양시 whey 배지의 살균방법 즉, 고압증기멸균(121$^{\circ}C$, 15분), 저온살균(60$^{\circ}C$, 30분) 방법과 배양액에 yeast extract를 0.5, 1% 첨가하였을 때 생균수와 총산도를 측정하여 P. freudenreichii KCCM 31227의 생육특성을 조사하였다. 6% whey 배지보다는 12% whey 배지에서, yeast extract 0.5% 보다는 1.0% 첨가 시 생균수가 높았고, 12% whey 배지에 yeast extract를 1.0% 첨가하고 저온살균하였을 때 배양 72시간에 7.5${\times}10^7$ cfu/ml로 가장 높은 생균수를 나타냈다. 총산도는 12% whey 배지에 yeast extract를 1.0% 첨가하여 저온살균하였을 때 5.2로 가장 높았다. 배양 72시간 동안 생균수와 총산도의 증가는 유사한 경향을 보여주었다. Propionic acid와 acetic acid의 생성은 고온살균보다 저온살균에서 높게 검출되었다.

• 한국축산식품학회지
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• 제41권1호
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• pp.145-152
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• 2021

Microbial bioconversion using lactic acid bacteria (LAB) provides several human health benefits. Although whey and whey-derived bioactive compounds can contribute to an improvement in human health, the potential anti-obesity effect of whey bioconversion by LAB has not been well studied. This study aimed to investigate whether bioconversion of whey by Pediococcus pentosaceus KI31 and Lactobacillus sakei KI36 (KI31-W and KI36-W, respectively) inhibits 3T3-L1 preadipocyte differentiation. Both KI31-W and KI36-W reduced intracellular lipid accumulation significantly, without decreasing 3T3-L1 preadipocyte proliferation. In addition, obesity-related transcription factor (peroxisome proliferator-activated receptor γ) and genes (adipocyte fatty acid-binding protein and lipoprotein lipase) were down-regulated significantly in 3T3-L1 cells in the presence of KI31-W and KI36-W. Collectively, these results suggest that bioconversion of whey by LAB exhibits anti-adipogenic activity and may be applied as a therapeutic agent for obesity.

• 한국식품과학회지
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• 제16권3호
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• pp.285-290
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• 1984

유청(乳淸)과 두유(豆乳)의 공동침전(共同沈澱)에 의해 치즈를 제조하기 위한 기초실험으로서 유청-두유 혼합액에서 6종의 유산균들의 생육특성을 조사하였다. S. cremoris와 L. acidophilus가 두유와 유청-두유 혼합액에서 다 같이 많은 산을 생성하였다. 그러나 모든 유산균들이 두유에서 보다는 유청-두유 혼합액에서 더 많은 산을 생성하였고 이것은 특히 S. lactis와 S. cremoris에서 현저하였다. S. lactis와 S. cremoris 혼합균주의 생균수는 두유에서보다 유청-두유혼합액에서 약10배정도 많았다. 유청-두유 혼합액에서 산생성이 증가되는 것은 유청중에 존재하는 유당의 효과에 주로 기인한 것으로 나타났다. 두유에서의 산생성을 촉진키 위해 첨가하는 유당의 적정량은 두유 100ml당 0.8g으로 밝혀졌다.

• Asian-Australasian Journal of Animal Sciences
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• 제30권1호
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• pp.85-93
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• 2017

Objective: This study evaluated the effect of acid whey and freeze-dried cranberries on the physicochemical characteristics, lipid oxidation and fatty acid composition of nitrite-free fermented sausage made from deer meat and pork fat. Antioxidant interactions between acid whey and cranberry compounds were also explored. Methods: Four formulations of fermented venison sausage were prepared: F1 (control), F2 (with 5% liquid acid whey), F3 (with 0.06% of freeze-dried cranberries), and F4 (with 5% liquid acid whey and 0.06% of freeze-dried cranberries). Each sample was analyzed for pH, water activity ($a_w$), heme iron content, 2-thiobarbituric acid reactive substances (TBARS) value and conjugated dienes at the end of the manufacturing process and at 30 and 90 days of refrigerated storage. Fatty acid composition was measured once at the end of the manufacturing process. Results: At the end of ripening, all samples presented statistically different values for a pH range of 4.47 to pH 4.59. The sum of the unsaturated fatty acids was higher, while the conjugated diene and the TBARS values were lower in sausages with freeze-dried cranberries as compared to the control sausage. The highest content of heme iron (21.52 mg/kg) at day 90 was found in the sausage formulation with the addition of freeze-dried cranberries, which suggests that the addition of cranberries stabilized the porphyrin ring of the heme molecule during storage and thereby reduced the release of iron. The use of liquid acid whey in combination with cranberries appears to not be justified in view of the oxidative stability of the obtained products. Conclusion: The results suggest that the application of freeze-dried cranberries can lower the intensity of oxidative changes during the storage of nitrite-free fermented sausage made