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Huang Z, Habib A, Ding X, Lv H. Physiochemical and Microbial Analysis of Tibetan Yak Milk Yogurt in Comparison to Locally Available Yogurt. Molecules 2023; 28:5242. [PMID: 37446903 DOI: 10.3390/molecules28135242] [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: 06/08/2023] [Revised: 06/28/2023] [Accepted: 07/04/2023] [Indexed: 07/15/2023] Open
Abstract
Yak yogurt, which is rich in microorganisms, is a naturally fermented dairy product prepared with ancient and modern techniques by Chinese herdsmen in the Qinghai-Tibet Plateau. The objective of this research was to assess the impact of Lactobacillus bulgaricus and Streptococcus thermophilus starter cultures on the quality and shelf life of yak yogurt, as well as the genetic stability across multiple generations, in comparison to commercially available plain yogurt and peach oat flavor yogurt. Following that, the samples were evenly divided into four treatment groups denoted as T1 (treatment 1), T2, T3, and T4, with each group employing a distinct source of yogurt formulation. T1 included L. bulgaricus, T2 comprised S. thermophilus, T3 consisted of plain yogurt, and T4 represented peach oat yogurt flavor. The findings indicate that T1 yogurt consistently presents a lower pH and higher acidity compared to the other three yogurt types throughout the entire generation process. Moreover, the fat content in all generations of the four yogurt types exceeds the national standard of 3.1 g/100 g, while the total solid content shows a tendency to stabilize across generations. The protein content varies significantly among each generation, with T1 and T4 yogurt indicating higher levels compared to the T2 and T3 yogurt groups. In terms of overall quality, T1 and T4 yogurt are superior to T2 and T3 yogurt, with T1 yogurt being the highest in quality among all groups. The findings revealed that the inclusion of L. bulgaricus led to enhanced flavor, texture, and genetic stability in yak yogurt. This study will serve as a valuable source of data, support, and methodology for the development and screening of compound starters to be utilized in milk fermentation in future research and applications.
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Affiliation(s)
- Zhipeng Huang
- Collaborative Innovation Center for Genetics and Development, State Key Laboratory of Genetic Engineering, Department of Microbiology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Arslan Habib
- Laboratory of Molecular Immunology, State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Xiaoming Ding
- Collaborative Innovation Center for Genetics and Development, State Key Laboratory of Genetic Engineering, Department of Microbiology, School of Life Sciences, Fudan University, Shanghai 200438, China
| | - Hong Lv
- State Key Laboratory of Genetic Engineering, School of Life Sciences, Fudan University, Shanghai 200438, China
- Shanghai Engineering Research Center of Industrial Microorganisms, Fudan University, Shanghai 200438, China
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Ali A, Iqbal S, Sohaib M, Khan AU, Younis RMW, Junaid S. Effects of commercial non-dairy tea whitener consumption in comparison to milk on lipid profile, histopathology, and liver enzymes in animal model. INTERNATIONAL FOOD RESEARCH JOURNAL 2022. [DOI: 10.47836/ifrj.29.5.07] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Abstract
The pandemic of obesity and other diet-related non-communicable diseases are serious threats to the wellbeing and financial prosperity around the globe. It has been documented that the consumption of processed foods with high levels of refined sugars and fats are the main cause contributing to this phenomenon. The present work was therefore conducted to assess the effects of the consumption of non-dairy tea whiteners (NDTW’s) on lipid profile, histopathology, and liver enzymes of rats for a period of three months. To this end, 30 albino Wister rats (7 weeks old, 130 ± 5 g) was divided into five groups namely control (G1), fed with whole milk (G2), and groups fed with defined dose of commercial NDTW’s (G3, G4, and G5). All rats were provided feed and water ad libitum during the experimental period. At trial completion, the rats were decapitated, and samples (blood, liver) were collected and subjected to blood chemistry (lipid profile) and liver histopathological analyses. Results indicated that as compared to milk, powder NDTW consumption increased the level of cholesterol (69%), triglycerides (98%), and LDL (84%), whereas HDL was non-significantly affected. On the other hand, liquid NDTW consumption led to the increase in triglyceride levels for all NDTW, and yielded 130% increase as compared to milk, which might have been attributed to composition of NDTW. Additionally, liver and renal functional tests yielded non-significant results. The present work concluded that the consumption of NDTW contributed towards derangement and elevation in lipid profile parameters as compared to milk, particularly if consumed for longer period of time.
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Zhang X, Yang J, Zhang C, Chi H, Zhang C, Zhang J, Li T, Liu L, Li A. Effects of Lactobacillus fermentum HY01 on the quality characteristics and storage stability of yak yogurt. J Dairy Sci 2022; 105:2025-2037. [PMID: 35033347 DOI: 10.3168/jds.2021-20861] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Accepted: 10/08/2021] [Indexed: 11/19/2022]
Abstract
Lactobacillus fermentum HY01 is a probiotic strain screened from traditional yak yogurt, which can effectively relieve enteritis and constipation. This study aimed to evaluate the effects of HY01 as an adjunct starter on the quality and storage of yak yogurt. A total of 36 main volatile flavor substances were detected in all samples. In particular, more aldehydes, esters, and alcohols were detected in yak yogurt prepared by mixed fermentation of L. fermentum HY01 and starter MY105 (including Streptococcus thermophilus and Lactobacillus delbrueckii ssp. bulgaricus). The rheological results showed that the yak yogurt prepared by mixed fermentation of L. fermentum HY01 and starter MY105 had higher apparent viscosity and lower tan δ value compared with compared with traditional yak yogurt, yak yogurt with only L. fermentum HY01, and cow yogurt with L. fermentum HY01 and starter MY105. Meanwhile, the conjugated linoleic acid in the yak yogurt prepared by mixed fermentation of L. fermentum HY01 and starter was significantly higher than those in the HY01 group or the yogurt starter group alone. After 28 d of storage at 4°C, the number of HY01 in the yak yogurt prepared by mixed fermentation of L. fermentum HY01 and starter was still higher than 107 cfu/mL, its acidity was lower than 110°T, and its syneresis was the lowest. The results indicated that L. fermentum HY01 could improve the flavor, texture, and storage properties of yak yogurt.
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Affiliation(s)
- Xin Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Jiajie Yang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Chao Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Houyu Chi
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Chongwei Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Jingjing Zhang
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Tongtong Li
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China
| | - Libo Liu
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China.
| | - Aili Li
- Key Laboratory of Dairy Science, Ministry of Education, College of Food Science, Northeast Agricultural University, Harbin 150030, Heilongjiang, China; Heilongjiang Green Food Research Institute, Harbin 150028, China.
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SOHAIB M, NAEEM M, ALI A, IQBAL S, AMJAD A, NAUMAN K, AHMAD S, RAZA M, SAAD BIN JUNAID M, UMAIR RIAZ M. Nutritional and safety evaluation of various liquid and powdered tea whiteners available in Pakistan. FOOD SCIENCE AND TECHNOLOGY 2022. [DOI: 10.1590/fst.04921] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Affiliation(s)
| | | | - Ahmad ALI
- University of Veterinary & Animal Sciences, Pakistan
| | | | | | - Kashif NAUMAN
- University of Veterinary & Animal Sciences, Pakistan
| | - Shahzad AHMAD
- University of Veterinary & Animal Sciences, Pakistan
| | - Mohsin RAZA
- University of Veterinary & Animal Sciences, Pakistan
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Azad M, Nadeem M, Gulzar N, Imran M. Impact of fractionation on fatty acids composition, phenolic compounds, antioxidant characteristics of olein and super olein fractions of flaxseed oil. J FOOD PROCESS PRES 2021. [DOI: 10.1111/jfpp.15369] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Muhammad Azad
- Department of Dairy Technology University of Veterinary and Animal Sciences Lahore Pakistan
| | - Muhammad Nadeem
- Department of Dairy Technology University of Veterinary and Animal Sciences Lahore Pakistan
| | - Nabila Gulzar
- Department of Dairy Technology University of Veterinary and Animal Sciences Lahore Pakistan
| | - Muhammad Imran
- Department of Dairy Technology University of Veterinary and Animal Sciences Lahore Pakistan
- Institute of Home and Food Sciences Faculty of Life Sciences Government College University Faisalabad Pakistan
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Relationship between Fatty Acids Composition/Antioxidant Potential of Breast Milk and Maternal Diet: Comparison with Infant Formulas. Molecules 2020; 25:molecules25122910. [PMID: 32599866 PMCID: PMC7356699 DOI: 10.3390/molecules25122910] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2020] [Revised: 06/19/2020] [Accepted: 06/22/2020] [Indexed: 02/02/2023] Open
Abstract
The fatty acid composition of human breast milk is relevant for the energy, immunity and eicosanoid production in infants. Additionally, the antioxidant properties of foods are essential for human health. Therefore, in the present study we aimed to investigate the relationship between maternal diet and fatty acids composition as well as the antioxidant potential of breast milk from donors to human milk bank of Perugia's hospital, Italy. Results were compared with infant formulas. We observed increased levels of total fatty acids and, in particular, saturated and monounsaturated fatty acids in milk from mothers fed on a vegetable and fruit-rich diet compared with a Mediterranean diet. In the same milk, a reduced antioxidant potential was found. All infant formulas resulted in richer total fatty acid content than human breast milk. Only some formulas were qualitatively similar to breast milk. Of note, the antioxidant potential of the formulas was higher or lower than the human milk with the exception of one sample. The antioxidant potential of four formulas was very high. Dietary supplementation with antioxidants has been shown to have a teratogenic effect and to increase the formation of metastases in adult. There are no data on the effects of excess antioxidants in the infants, but the possibility that they can be harmful cannot be excluded.
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Ullah R, Nadeem M, Imran M, Khan MK, Mushtaq Z, Asif M, Din A. Effect of microcapsules of chia oil on Ω-3 fatty acids, antioxidant characteristics and oxidative stability of butter. Lipids Health Dis 2020; 19:10. [PMID: 31948460 PMCID: PMC6966832 DOI: 10.1186/s12944-020-1190-5] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/09/2019] [Accepted: 01/08/2020] [Indexed: 02/07/2023] Open
Abstract
Background Ω-3 fatty acids perform several therapeutic functions in the body, however, their applications are limited due to the inferior oxidative stability. To improve the oxidative stability and release properties of Ω-3 fatty acids, microencapsulation is performed. Butter is a good source of fat-soluble vitamins and antioxidant systems however, it is not a good source of Ω-3 fatty acids. Supplementation of butter with microcapsules of vegetable oils rich in Ω-3 fatty acids is not reported in literature. Methods Microcapsules of chia oil (MCO) were prepared using chitosan as encapsulating material by spray drying at lower temperature. Unsalted butter prepared from cultured cream using Lactococcus lactis ssp. Lactis at 21 °C for 16 Hrs. Cream was churned at 12 °C and microcapsules of chia oil were added to the butter during the working stage at four different concentrations i.e. 2, 4, 6 and 8% (T1, T2, T3 and T4, respectively). Butter without supplementation of MCO were kept as control. Butter samples were stored for 90 days at -10 °C. Butter composition, antioxidant capacity, fatty acid profile, induction period, free fatty acids, peroxide value and sensory evaluation were performed at 0, 45 and 90 days of storage. Results Addition of MCO in butter did not have any effect on standards of identity of butter. Microencapsulation had no effect on fatty acid profile of microcapsules of chia oil. Concentration of alpha-linolenic acid (ALA) in control, T1, T2, T3 and T4 were 0.49, 4.29, 8.41, 13.21 and 17.44%, respectively. Concentration of ALA in fresh and 90 days stored butter samples were 17.44 and 17.11%, respectively. After 90 days of storage, loss of eicosapentaenoic acid (EPA), docosapentaenoic acid (DPA) and docosahexaenoic acid (DHA) were 0.07%, 0.05 and 0.03%, respectively. At 0, 45 and 90 days of storage, 2, 2-Diphenyl-1-picrylhydrazyle (DPPH) free radical scavenging activity of free chia oil was 39.81, 71.22 and 62.18%, respectively. However, microcapsules of chia oil had superior antioxidant activity. DPPH free radical scavenging activity of microcapsules at 0, 45 and 90 days of storage was 36.51, 36.43 and 35.96%, respectively (p > 0.05). Total antioxidant capacity of microcapsules at 0, 45 and 90 days of storage was 70.53, 69.88 and 68.52%, respectively (p > 0.05). It was recorded that induction period of free chia oil and microcapsules was only 2.86 h and 8.55 h. Among the butter samples, control revealed the lowest induction period. While, induction period of experimental samples was not different from each other. Peroxide value and free fatty acids of the butter samples at the end of storage period (90 days) was less than the European Union standards limit (10MeqO2/kg and 0.2%). Sensory characteristics of experimental samples were similar to the control. MCO can be added in butter to improve its functional value. Conclusion Concentration of Ω-3 fatty acids in butter up to 8% can be increased through microcapsules of chia oil with reasonable oxidative stability and no effect on sensory characteristics.
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Affiliation(s)
- Rahman Ullah
- Department of Dairy Technology, University of Veterinary and Animal Sciences, Outfall Road, Lahore, Pakistan
| | - Muhammad Nadeem
- Department of Dairy Technology, University of Veterinary and Animal Sciences, Outfall Road, Lahore, Pakistan.
| | - Muhammad Imran
- Institute of Home and Food Sciences, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan
| | - Muhammad Kamran Khan
- Institute of Home and Food Sciences, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan
| | - Zarina Mushtaq
- Institute of Home and Food Sciences, Faculty of Life Sciences, Government College University, Faisalabad, Pakistan
| | - Muhammad Asif
- Planning and Development Division, Pakistan Agricultural Research Council, Islamabad, Pakistan
| | - Ahmad Din
- Postharvest Research Station, Ayub Agricultural Research Institute, Faisalabad, Pakistan
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