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Liu Y, Gao S, Cui Y, Wang L, Duan J, Yang X, Liu X, Zhang S, Sun B, Yu H, Gao X. Characteristics of Lactic Acid Bacteria as Potential Probiotic Starters and Their Effects on the Quality of Fermented Sausages. Foods 2024; 13:198. [PMID: 38254499 PMCID: PMC10813914 DOI: 10.3390/foods13020198] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2023] [Revised: 01/02/2024] [Accepted: 01/04/2024] [Indexed: 01/24/2024] Open
Abstract
The aim of this study was to explore the potential of commercial lactic acid bacteria (LAB) as probiotic starters in fermented sausages. We initially investigated the growth activity, acid production capability, and tolerance to fermentation conditions of Lactobacillus sakei, Lactiplantibacillus plantarum, and Pediococcus pentosaceus. All three LAB strains proved viable as starters for fermented sausages. Subsequently, we explored their potential as probiotics based on their antibacterial and antioxidant capabilities. L. plantarum exhibited stronger inhibition against Escherichia coli and Staphylococcus aureus. All three strains displayed antioxidant abilities, with cell-free supernatants showing a higher antioxidant activity compared to intact cells and cell-free extracts. Moreover, the activities of superoxide dismutase, glutathione peroxidase, and catalase were stronger in the cell-free supernatant, cell-free extract, and intact cell, respectively. Finally, we individually and collectively inoculated these three LAB strains into sausages to investigate their impact on quality during the fermentation process. External starters significantly reduced pH, thiobarbituric acid reactive substances, and sodium nitrite levels. The improvements in color and texture had positive effects, with the L. plantarum inoculation achieving higher sensory scores. Overall, all three LAB strains show promise as probiotic fermentation starters in sausage production.
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Affiliation(s)
- Yinchu Liu
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang 050018, China; (Y.L.); (S.G.); (L.W.); (J.D.); (X.Y.)
| | - Sai Gao
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang 050018, China; (Y.L.); (S.G.); (L.W.); (J.D.); (X.Y.)
| | - Yue Cui
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang 050018, China; (Y.L.); (S.G.); (L.W.); (J.D.); (X.Y.)
| | - Lin Wang
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang 050018, China; (Y.L.); (S.G.); (L.W.); (J.D.); (X.Y.)
| | - Junya Duan
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang 050018, China; (Y.L.); (S.G.); (L.W.); (J.D.); (X.Y.)
| | - Xinyu Yang
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang 050018, China; (Y.L.); (S.G.); (L.W.); (J.D.); (X.Y.)
| | - Xiaochang Liu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.L.); (S.Z.); (B.S.); (H.Y.)
| | - Songshan Zhang
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.L.); (S.Z.); (B.S.); (H.Y.)
| | - Baozhong Sun
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.L.); (S.Z.); (B.S.); (H.Y.)
| | - Haojie Yu
- Institute of Animal Sciences, Chinese Academy of Agricultural Sciences, Beijing 100193, China; (X.L.); (S.Z.); (B.S.); (H.Y.)
| | - Xiaoguang Gao
- College of Food Science and Biology, Hebei University of Science and Technology, Shijiazhuang 050018, China; (Y.L.); (S.G.); (L.W.); (J.D.); (X.Y.)
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García-López JD, Barbieri F, Baños A, Madero JMG, Gardini F, Montanari C, Tabanelli G. Use of two autochthonous bacteriocinogenic strains as starter cultures in the production of salchichónes, a type of Spanish fermented sausages. Curr Res Food Sci 2023; 7:100615. [PMID: 37881335 PMCID: PMC10594565 DOI: 10.1016/j.crfs.2023.100615] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/04/2023] [Revised: 10/05/2023] [Accepted: 10/08/2023] [Indexed: 10/27/2023] Open
Abstract
In this work, two autochthonous LAB strains (Lactiplantibacillus paraplantarum BPF2 and Pediococcus acidilactici ST6), isolated from spontaneously fermented sausages produced in Spain, were tested to produce Spanish fermented sausages (salchichón) in pilot plants, due to their promising technological and anti-listerial activity. These products were compared with a sample obtained with a commercial starter (RAP) and a spontaneously fermented control sample. Physico-chemical parameters, microbial counts, metagenomic analysis, biogenic amines content and organoleptic profile of the obtained samples were studied to assess the performances of the native starters. In fact, traditional and artisanal products obtained through spontaneous fermentations can represent an important biodiversity reservoir of strains to be exploited as new potential starter cultures, to improve the safety, quality and local differentiation of traditional products. The data underlined that ST6 strain resulted in a final lower percentage if compared with the other LAB used as starter cultures. The use of starters reduced the BA concentration observed in the sausages obtained with spontaneous fermentation and the BPF2 and ST6 strains were able to decrease the level of products rancidity. Moreover, a challenge test against L. monocytogenes were performed. The data confirmed the effectiveness in the inhibition of L. monocytogenes by the two bacteriocinogenic strains tested, with respect to RAP and control samples, highlighting their ability to produce bacteriocins in real food systems. This work demonstrated the promising application in meat industry of these autochthonous strains as starter cultures to improve sensory differentiation and recognizability of typical fermented sausages.
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Affiliation(s)
| | - Federica Barbieri
- Department of Agricultural and Food Sciences, University of Bologna, 47521, Cesena, Italy
| | - Alberto Baños
- Department of Microbiology, DOMCA S.A.U, 18620, Alhendín, Spain
| | | | - Fausto Gardini
- Department of Agricultural and Food Sciences, University of Bologna, 47521, Cesena, Italy
| | - Chiara Montanari
- Department of Agricultural and Food Sciences, University of Bologna, 47521, Cesena, Italy
| | - Giulia Tabanelli
- Interdepartmental Center for Industrial Agri-Food Research, University of Bologna, 47521, Cesena, Italy
- Department of Agricultural and Food Sciences, University of Bologna, 40127, Bologna, Italy
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Kim HJ, Kim HJ, Kim HC, Lee D, Jung HY, Kang T, Jo C. Mathematical modeling for freshness/spoilage of chicken breast using chemometric analysis. Curr Res Food Sci 2023; 7:100590. [PMID: 37727874 PMCID: PMC10506101 DOI: 10.1016/j.crfs.2023.100590] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/25/2023] [Revised: 09/04/2023] [Accepted: 09/07/2023] [Indexed: 09/21/2023] Open
Abstract
Chicken meat spoilage is a significant concern for food safety and quality, and this study aims to predict the spoilage point of chicken breast meat through various attributes and metabolites. Chicken meat was stored in anaerobic packaging at 4 °C for 13 days, and various meat quality attributes (pH, drip loss, color, volatile basic nitrogen [VBN], total aerobic bacteria [TAB], and metabolites) were examined. First, the spoiled point (VBN >20 mg/100 g and/or TAB >7 log CFU/g) of the chicken breast meat was determined. Using univariate and multivariate analyses, twenty-four candidate metabolites were identified. A receiver operating characteristic (ROC) analysis was used to validate the obtained binary logistic regression model using nine metabolites (proline, methionine, glutamate, threonine, acetate, uridine 5'-monophosphate, hypoxanthine, glycine, and glutamine). The results showed a high area under the ROC curve value (0.992). Thus, this study confirmed the predictability of spoilage points in chicken breast meat through these nine metabolites.
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Affiliation(s)
- Hyun-Jun Kim
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hye-Jin Kim
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyun Cheol Kim
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, 08826, Republic of Korea
| | - Dongheon Lee
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, 08826, Republic of Korea
| | - Hyun Young Jung
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, 08826, Republic of Korea
| | - Taemin Kang
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, 08826, Republic of Korea
| | - Cheorun Jo
- Department of Agricultural Biotechnology, Center for Food and Bioconvergence, and Research Institute of Agriculture and Life Science, Seoul National University, Seoul, 08826, Republic of Korea
- Institute of Green BioScience and Technology, Seoul National University, Pyeongchang, 25354, Republic of Korea
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Yoo Y, Oh H, Yoon Y. Isolation of Debaryomyces hansenii and selection of an optimal strain to improve the quality of low-grade beef rump (middle gluteal) during dry aging. Anim Biosci 2023; 36:1426-1434. [PMID: 37170499 PMCID: PMC10472159 DOI: 10.5713/ab.22.0475] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 02/12/2023] [Accepted: 05/03/2023] [Indexed: 05/13/2023] Open
Abstract
OBJECTIVE The objective of this study was to evaluate the effect of Debaryomyces hansenii isolated from dry-aged beef on the tenderness and flavor attributes of low-grade beef during dry aging. METHODS Five D. hansenii strains were isolated from dry-aged beef samples. The rump of low-grade beef was inoculated with individual D. hansenii isolates and subjected to dry aging for 4 weeks at 5°C and 75% relative humidity. Microbial contamination levels, meat quality attributes, and flavor attributes in the dry-aged beef were measured. RESULTS Of the five isolates, the shear force of dry-aged beef inoculated with SMFM201812-3 and SMFM201905-5 was lower than that of control samples. Meanwhile, all five isolates increased the total free amino acid, glutamic acid, serine, glycine, alanine, and leucine contents in dry-aged beef. In particular, the total fatty acid, palmitic acid, and oleic acid contents in samples inoculated with D. hansenii SMFM201905-5 were higher than those in control samples. CONCLUSION These results indicate that D. hansenii SMFM201905-5 might be used to improve the quality of beef during dry aging.
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Affiliation(s)
- Yoonjeong Yoo
- Department of Food and Nutrition, Sookmyung Women’s University, Seoul 04310,
Korea
| | - Hyemin Oh
- Risk Analysis Research Center, Sookmyung Women’s University, Seoul 04310,
Korea
| | - Yohan Yoon
- Department of Food and Nutrition, Sookmyung Women’s University, Seoul 04310,
Korea
- Risk Analysis Research Center, Sookmyung Women’s University, Seoul 04310,
Korea
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Zavistanaviciute P, Klementaviciute J, Klupsaite D, Zokaityte E, Ruzauskas M, Buckiuniene V, Viskelis P, Bartkiene E. Effects of Marinades Prepared from Food Industry By-Products on Quality and Biosafety Parameters of Lamb Meat. Foods 2023; 12:foods12071391. [PMID: 37048209 PMCID: PMC10093910 DOI: 10.3390/foods12071391] [Citation(s) in RCA: 5] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/21/2023] [Accepted: 03/22/2023] [Indexed: 03/29/2023] Open
Abstract
This study aimed to develop marinade formulas based on by-products from the dairy, berry, and fruit industries and apply them to lamb meat (LM) treatments to improve the safety and quality characteristics of the meat. To fulfil this aim, six marinade (M) formulations were created based on acid whey (AW) fermented with Lacticaseibacillus casei (Lc) and Liquorilactobacillus uvarum (Lu), either alone or combined with freeze-dried apple (AP) or blackcurrant (BC) pomace. The most appropriate fermentation times for the marinades were selected according to the lower pH values and higher viable LAB counts in the samples. Additionally, the antimicrobial activity of the selected marinades against pathogenic and opportunistic bacterial strains was tested. The characteristics of the LM were analysed after 24 and 48 h of treatment, including physicochemical, technological, and microbiological parameters, as well as overall acceptability. It was established that, after 48 h of fermentation, all of the tested marinades, except M-AWLuBC, had lactic acid bacterial counts > 8.0 log10 CFU·mL−1 and pH values < 3.74. The broadest spectra of pathogen inhibition were observed in the M-AWLuAP and M-AWLuBC marinades. The latter formulations improved the water holding capacity (WHC) and overall acceptability of the LM, while, in the LM-AWLcAP samples, histamine, cadaverine, putrescine, tryptamine, and phenylethylamine were not formed. Lastly, LM treatment with the M-AWLcAP and M-AWLuAP formulas for 48 h achieved the highest overall acceptability (9.04 and 9.43), tenderness (1.53 and 1.47 kg·cm−2) and WHC (2.95% and 3.5%) compared to the control samples.
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Affiliation(s)
- Paulina Zavistanaviciute
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Correspondence: ; Tel.: +370-655-06461
| | - Jolita Klementaviciute
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Dovile Klupsaite
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Egle Zokaityte
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Modestas Ruzauskas
- Department of Anatomy and Physiology, Faculty of Veterinary, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Institute of Microbiology and Virology, Faculty of Veterinary, Lithuanian University of Health Sciences, Mickeviciaus Str. 9, LT-44307 Kaunas, Lithuania
| | - Vilija Buckiuniene
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
| | - Pranas Viskelis
- Lithuanian Research Centre for Agriculture and Forestry, Institute of Horticulture, Kauno Str. 30, LT-54333 Babtai, Lithuania
| | - Elena Bartkiene
- Institute of Animal Rearing Technologies, Faculty of Animal Sciences, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
- Department of Food Safety and Quality, Veterinary Academy, Lithuanian University of Health Sciences, Tilzes Str. 18, LT-47181 Kaunas, Lithuania
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Millet Grains as an Immobilizing Matrix for Probiotics in Dry Fermented Sausage. FOOD BIOPROCESS TECH 2023. [DOI: 10.1007/s11947-023-03003-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
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Liu R, Ma Y, Chen L, Lu C, Ge Q, Wu M, Xi J, Yu H. Effects of the addition of leucine on flavor and quality of sausage fermented by Lactobacillus fermentum YZU-06 and Staphylococcus saprophyticus CGMCC 3475. Front Microbiol 2023; 13:1118907. [PMID: 36817110 PMCID: PMC9932774 DOI: 10.3389/fmicb.2022.1118907] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Accepted: 12/28/2022] [Indexed: 02/05/2023] Open
Abstract
Methyl-branched aldehydes, especially 3-methylbutanal, have been reported to be perceived either as a malty or as a nutty/chocolate-like aroma and were considered an important flavor contributor in fermented meat products. Decomposition of leucine (Leu) by branched-chain amino acid transaminase (BACT) is a crucial step in the metabolism of Leu to 3-methylbutanal. This study was conducted to explore the effects of mixed-starter culture (Lactobacillus fermentum YZU-06 and Staphylococcus saprophyticus CGMCC 3475) and addition of Leu (0, 1, and 3 mM) on the flavor and quality of fermented sausages. The pH, water activity, texture profile analysis, color, counts of lactic acid bacteria (LAB) and staphylococci, peptide, and flavor compounds were detected during fermentation. The results showed that the starter culture group increased hardness, elasticity, the counts of LAB and staphylococci, peptide content, volatile flavor compounds, as well as the sensorial scores of sausage, while decreasing pH, a w , and L* and b* values compared with the non-inoculation group. The mixed starter of adding with 3 mM Leu enhanced the content of 3-methylbutanal and overall flavor of fermented sausages. It is applicable to directionally produce methyl-branched aldehydes and improve the overall quality of fermented sausage by the addition of Leu and using starter of L. fermentum YZU-06 and S. saprophyticus CGMCC 3475.
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Affiliation(s)
- Rui Liu
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, China
| | - Yong Ma
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, China
| | - Lei Chen
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, China
| | - Chenyan Lu
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, China
| | - Qingfeng Ge
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, China
| | - Mangang Wu
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, China
| | - Jun Xi
- Changshou Characteristic Meat Product Processing and Engineering Research Center of Jiangsu, Jiangsu Changshou Group Co., Ltd., Rugao, Jiangsu, China
| | - Hai Yu
- School of Food Science and Engineering, Yangzhou University, Yangzhou, Jiangsu, China,*Correspondence: Hai Yu,
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Rocchetti G, Rebecchi A, Maria Lopez C, Dallolio M, Dallolio G, Trevisan M, Lucini L. Impact of axenic and mixed starter cultures on metabolomic and sensory profiles of ripened Italian salami. Food Chem 2023; 402:134182. [DOI: 10.1016/j.foodchem.2022.134182] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2022] [Revised: 08/25/2022] [Accepted: 09/06/2022] [Indexed: 10/14/2022]
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Jeong CH, Lee SH, Yoon Y, Choi HY, Kim HY. Identification of Optimal Fermentation Temperature for Dry-Fermented Sausage Using Strains Isolated from Korean Fermented Foods. Foods 2022; 12:foods12010137. [PMID: 36613352 PMCID: PMC9818867 DOI: 10.3390/foods12010137] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Revised: 12/23/2022] [Accepted: 12/23/2022] [Indexed: 12/29/2022] Open
Abstract
This study aims at identifying the optimal fermentation temperature for dry-fermented sausage using strains isolated from Kimchi (GK1, Pediococcus pentosaceus-GK1; NK3, P. pentosaceus-NK3), Doenjang (D1, Debaryomyces hansenii-D1), and commercial fermented sausage (S6, spontaneously generated Penicillium nalgiovense-S6). The microbial population, pH, moisture content, color, thiobarbituric acid reactive substance (TBARS), volatile basic nitrogen (VBN), and electronic nose (E-nose) were analyzed to identify the optimal fermentation temperature. The dry-fermented sausages were inoculated with three types of starter cultures [CS (commercial starter culture), GD (GK1 + D1 + S6), and ND (NK3 + D1 + S6)]. The fermentation was performed for 3 days at 20 °C and 25 °C, and dried for 28 days. The Lactobacillus spp. plate count and TBARS showed significantly higher values in the 25 °C group than in the 20 °C group (p < 0.05). The Staphylococcus spp. plate count of GD and ND were significantly higher than CS group at all temperatures. On day 31, the moisture content and VBN values of all groups were less than 35 % and 20 mg%, respectively. According to E-nose, the highest amount of acetoin was detected at the GD group fermented at 25 °C. Thus, the optimal fermentation temperature is expected at 25 °C after using GD in the manufacturing of dry-fermented sausages.
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Affiliation(s)
- Chang-Hwan Jeong
- Department of Animal Resources Science, Kongju National University, Yesan-Gun 32439, Republic of Korea
| | - Sol-Hee Lee
- Department of Animal Resources Science, Kongju National University, Yesan-Gun 32439, Republic of Korea
| | - Yohan Yoon
- Department of Food and Nutrient, Sookmyung Women’s University, Seoul 04310, Republic of Korea
| | - Hyung-Youn Choi
- Food Standard Research Center, Food Industry Research Division, Korea Food Research Institute, Wanju-Gun 55365, Republic of Korea
- Correspondence: (H.-Y.C.); (H.-Y.K.); Tel.: +82-63-219-9274 (H.-Y.C.); +82-41-330-1241 (H.-Y.K.); Fax: +82-63-219-9333 (H.-Y.C.); +82-41-330-1249 (H.-Y.K.)
| | - Hack-Youn Kim
- Department of Animal Resources Science, Kongju National University, Yesan-Gun 32439, Republic of Korea
- Correspondence: (H.-Y.C.); (H.-Y.K.); Tel.: +82-63-219-9274 (H.-Y.C.); +82-41-330-1241 (H.-Y.K.); Fax: +82-63-219-9333 (H.-Y.C.); +82-41-330-1249 (H.-Y.K.)
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Jeong CH, Lee SH, Kim HY. Analysis of Food Storage Stability of Biodegradable Containers Made of Pork Skin Gelatin Polymer with Walnut Shell Powder. Polymers (Basel) 2022; 14:polym14101940. [PMID: 35631823 PMCID: PMC9144320 DOI: 10.3390/polym14101940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2022] [Revised: 05/03/2022] [Accepted: 05/06/2022] [Indexed: 11/29/2022] Open
Abstract
This study analyzes the food storage stability of biodegradable containers made of pork skin gelatin polymer. Packaging materials were prepared with different proportions of walnut shell powder, including 10% (W10), 20% (W20), and polyethylene packaging (PE) as a control. To analyze storage stability, parameters such as pH, thiobarbituric acid reactive substance (TBARS), volatile basic nitrogen (VBN), microbial population, and color were measured. The pH, yeast and mold, redness, and yellowness of W10 and W20 had no significant difference compared to those of PE in all storage periods (p > 0.05). The TBARS of W20 was shown to slowly increase compared to W10. The VBN concentration of W10 and W20 were significantly higher than that of PE in the first and second weeks, but there was no significant difference in the third week (p < 0.05). The total bacterial counts of W10 and W20 were significantly higher than that of PE during the first week (p < 0.05), but there was no significant difference thereafter (p > 0.05). The lightness values of W10 and W20 were significantly lower than that of PE in the second and third weeks (p < 0.05). These results indicated that biodegradable containers containing up to 20% walnut shell powder can substitute plastic packaging materials.
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Affiliation(s)
| | | | - Hack-Youn Kim
- Correspondence: ; Tel.: +82-41-330-1241; Fax: +82-41-330-1249
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