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Rysova L, Cejnar P, Hanus O, Legarova V, Havlik J, Nejeschlebova H, Nemeckova I, Jedelska R, Bozik M. Use of MALDI-TOF MS technology to evaluate adulteration of small ruminant milk with raw bovine milk. J Dairy Sci 2022; 105:4882-4894. [PMID: 35379461 DOI: 10.3168/jds.2021-21396] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/08/2021] [Accepted: 01/31/2022] [Indexed: 12/11/2022]
Abstract
Detection of adulteration of small ruminant milk is very important for health and commercial reasons. New analytical and cost-effective methods need to be developed to detect new adulteration practices. In this work, we aimed to explore the ability of the MALDI-TOF mass spectrometry to detect bovine milk in caprine and ovine milk using samples from 18 dairy farms. Different levels of adulteration (0.5, 1, 5, 10, 20, 40, 60, and 80%) were analyzed during the lactation period of goat and sheep (in May, from 60 to 90 d in milk, and in August, from 150 to 180 d in milk). Two different ranges of peptide-protein spectra (500-4,000 Da; 4-20 kDa) were used to establish a calibration model for predicting the concentration of adulterant using partial least squares and generalized linear model with lasso regularization. The low molecular weight part of the spectra together with the generalized linear model with lasso regularization regression model appeared to have greater potential for our aim of detection of adulteration of small ruminants' milk. The subsequent prediction model was able to predict the concentration of bovine milk in caprine milk with a root mean square error of 11.4 and 17.0% in ovine milk. The results offer compelling evidence that MALDI-TOF can detect the adulteration of small ruminants' milk. However, the method is severely limited by (1) the complexity of the milk proteome resulting from the adulteration technique, (2) the potential degradation of thermolabile proteins, and (3) the genetic variability of tested samples. Additionally, the root mean square error of prediction based only on one individual sample adulteration series can drop down to 6.34% for quantification of adulterated caprine milk and 6.28% for adulterated ovine milk for the full set of concentrations or down to 2.33 and 4.00%, respectively, if we restrict only to low concentrations of adulteration (0, 0.5, 1, 5, 10%).
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Affiliation(s)
- L Rysova
- Department of Food Science, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague-Suchdol, Czech Republic
| | - P Cejnar
- Department of Computing and Control Engineering, University of Chemistry and Technology, Prague, Technicka 5, 166 28 Prague 6-Dejvice, Czech Republic
| | - O Hanus
- Dairy Research Institute Ltd., Ke Dvoru 12a, 160 00 Prague 6-Vokovice, Czech Republic
| | - V Legarova
- Department of Food Science, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague-Suchdol, Czech Republic
| | - J Havlik
- Department of Food Science, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague-Suchdol, Czech Republic
| | - H Nejeschlebova
- Dairy Research Institute Ltd., Ke Dvoru 12a, 160 00 Prague 6-Vokovice, Czech Republic
| | - I Nemeckova
- Dairy Research Institute Ltd., Ke Dvoru 12a, 160 00 Prague 6-Vokovice, Czech Republic
| | - R Jedelska
- Dairy Research Institute Ltd., Ke Dvoru 12a, 160 00 Prague 6-Vokovice, Czech Republic
| | - M Bozik
- Department of Food Science, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague-Suchdol, Czech Republic.
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Rysova L, Legarova V, Pacakova Z, Hanus O, Nemeckova I, Klimesova M, Havlik J. Detection of bovine milk adulteration in caprine milk with N-acetyl carbohydrate biomarkers by using 1H nuclear magnetic resonance spectroscopy. J Dairy Sci 2021; 104:9583-9595. [PMID: 34099301 DOI: 10.3168/jds.2020-20077] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2020] [Accepted: 04/18/2021] [Indexed: 12/25/2022]
Abstract
In a return to tradition, the popularity of caprine milk is on the rise. However, particularly in countries with developed dairy industries based on bovine milk, there is the risk of adulteration with bovine milk, which is a cheaper alternative. Thus, a rapid, robust, and simple method for the detection of bovine milk added to caprine milk is necessary, and 1H nuclear magnetic resonance spectroscopy appears to provide a solution. A matrix of 115 pure and artificially adulterated pasteurized milk samples was prepared and used to discover biomarkers of bovine milk that are independent of chemical and biological variation caused by factors such as genetics, diet, or seasonality. Principal component analysis and orthogonal projections to latent structures discriminant analysis of pure bovine milk and pure caprine milk revealed spectral features that were assigned to the resonances of 4 molecules. Of these, the peaks corresponding to protons in the N-acetylglucosamine and N-acetylgalactosamine acetyl moieties showed significant applicability for our method. Receiver operating characteristic curve analysis was used to evaluate the performance of the peak integrals as biomarkers of adulteration. This approach was able to distinguish caprine milk adulterated with 5% of bovine milk with 84.78% accuracy and with 10% of bovine milk an excellent 95.65% accuracy. This study demonstrates that N-acetyl carbohydrates could be used as biomarkers for the detection of bovine milk in caprine milk and could help in protecting caprine milk authenticity.
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Affiliation(s)
- L Rysova
- Department of Food Science, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague 6-Suchdol, Czech Republic
| | - V Legarova
- Department of Food Science, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague 6-Suchdol, Czech Republic
| | - Z Pacakova
- Department of Statistics, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague 6-Suchdol, Czech Republic
| | - O Hanus
- Dairy Research Institute Ltd., Ke Dvoru 12a, 165 00 Prague 6, Czech Republic
| | - I Nemeckova
- Dairy Research Institute Ltd., Ke Dvoru 12a, 165 00 Prague 6, Czech Republic
| | - M Klimesova
- Dairy Research Institute Ltd., Ke Dvoru 12a, 165 00 Prague 6, Czech Republic
| | - J Havlik
- Department of Food Science, Czech University of Life Sciences Prague, Kamycka 129, 165 00 Prague 6-Suchdol, Czech Republic.
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Edwards CA, Havlik J, Cong W, Mullen W, Preston T, Morrison DJ, Combet E. Polyphenols and health: Interactions between fibre, plant polyphenols and the gut microbiota. NUTR BULL 2017; 42:356-360. [PMID: 29200959 PMCID: PMC5698720 DOI: 10.1111/nbu.12296] [Citation(s) in RCA: 84] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
A high‐fibre diet and one rich in fruit and vegetables have long been associated with lower risk of chronic disease. There are several possible mechanisms underpinning these associations, but one likely important factor is the production of bioactive molecules from plant‐based foods by the bacteria in the colon. This links to our growing understanding of the role of the gut microbiome in promoting health. Polyphenolic‐rich plant foods have been associated with potential health effects in many studies, but the bioavailability of polyphenol compounds, as eaten, is often very low. Most of the ingested molecules enter the large intestine where they are catabolised to smaller phenolic acids that may be the key bioactive effectors. Dietary fibres, present in plant foods, are also fermented by the bacteria to short‐chain fatty acids, compounds associated with several beneficial effects on cell turnover, metabolism and eating behaviour. Polyphenols and fibre are often eaten together, but there is a lack of research investigating the interaction between these two groups of key substrates for the colonic bacteria. In a project funded by the Biotechnology and Biological Sciences Research Council Diet and Health Research Industry Club, we are investigating whether combining different fibres and polyphenol sources can enhance the production of bioactive phenolic acids to promote health. This could lead to improved dietary recommendations and to new products with enhanced potential health‐promoting actions.
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Affiliation(s)
| | - J Havlik
- University of Glasgow Glasgow UK
| | - W Cong
- University of Glasgow Glasgow UK
| | - W Mullen
- University of Glasgow Glasgow UK
| | | | | | - E Combet
- University of Glasgow Glasgow UK
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Volstatova T, Havlik J, Doskocil I, Potuckova M, Hroncova Z. MON-PP035: Adhesion Abilities of Five Different Milk Proteins on the Selected Strains of Lactobacilli in Cell Culture Model. Clin Nutr 2015. [DOI: 10.1016/s0261-5614(15)30467-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Killer J, Kopecny J, Mrazek J, Rada V, Benada O, Koppova I, Havlik J, Straka J. Bifidobacterium bombi sp. nov., from the bumblebee digestive tract. Int J Syst Evol Microbiol 2009; 59:2020-4. [DOI: 10.1099/ijs.0.002915-0] [Citation(s) in RCA: 69] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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Kokoska L, Havlik J, Valterova I, Sovova H, Sajfrtova M, Jankovska I. Comparison of chemical composition and antibacterial activity of Nigella sativa seed essential oils obtained by different extraction methods. J Food Prot 2008; 71:2475-80. [PMID: 19244901 DOI: 10.4315/0362-028x-71.12.2475] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Nigella sativa L. seed essential oils obtained by hydrodistillation (HD), dry steam distillation (SD), steam distillation of crude oils obtained by solvent extraction (SE-SD), and supercritical fluid extraction (SFE-SD) were tested for their antibacterial activities, using the broth microdilution method and subsequently analyzed by gas chromatography and gas chromatography-mass spectrometry. The results showed that the essential oils tested differed markedly in their chemical compositions and antimicrobial activities. The oils obtained by HD and SD were dominated by p-cymene, whereas the major constituent identified in both volatile fractions obtained by SD of extracted oils was thymoquinone (ranging between 0.36 and 0.38 g/ml, whereas in oils obtained by HD and SD, it constituted only 0.03 and 0.05 g/ml, respectively). Both oils distilled directly from seeds showed lower antimicrobial activity (MICs > or = 256 and 32 microg/ml for HD and SD, respectively) than those obtained by SE-SD and SFE-SD (MICs > or = 4 microg/ml). All oil samples were significantly more active against gram-positive than against gram-negative bacteria. Thymoquinone exhibited potent growth-inhibiting activity against gram-positive bacteria, with MICs ranging from 8 to 64 microg/ml.
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Affiliation(s)
- L Kokoska
- Department of Crop Sciences and Agroforestry, Institute of Tropics and Subtropics, Czech University of Life Sciences Prague, Kamycka 129, 165 21 Prague 6-Suchdol, Czech Republic.
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Havlik J, Kokoska L, Vasickova S, Valterova I. Chemical composition of essential oil from the seeds ofNigella arvensis L. and assessment of its actimicrobial activity. FLAVOUR FRAG J 2006. [DOI: 10.1002/ffj.1713] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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Kokoska L, Havlik J, Valterova I, Nepovim A, Rada V, Vanek T. Chemical composition of the essential oil ofNigella orientalis L. seeds. FLAVOUR FRAG J 2005. [DOI: 10.1002/ffj.1449] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Alvarez-McLeod A, Havlik J, Drew KE. Foscarnet treatment of genital infection due to acyclovir-resistant herpes simplex virus type 2 in a pregnant patient with AIDS: case report. Clin Infect Dis 1999; 29:937-8. [PMID: 10589917 DOI: 10.1086/520465] [Citation(s) in RCA: 20] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
Affiliation(s)
- A Alvarez-McLeod
- Division of Infectious Diseases, Cobb County Board of Health/Immunology Clinic, Marietta, Georgia 30060-4009, USA.
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Krcméry V, Havlik J. Emergence of transferable amikacin resistance in enterobacteria in a Czechoslovakian clinic. J Antimicrob Chemother 1986; 18:429-31. [PMID: 3771430 DOI: 10.1093/jac/18.3.429-a] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/07/2023] Open
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Siniukhin VN, Pochatov IM, Berezin FV, Havlik J, Janku J. [Clinical pharmacokinetics of azabutyron, a new short-term action neuroleptic]. Farmakol Toksikol 1978; 41:154-7. [PMID: 350611] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
Abstract
Pharmacokinetics of azabutyron--a new Soviet-made neuroleptic was studied clinically without anesthesia and also during surgery against the background of deep and surface fluorothan anesthesia in conjunction with artificial nitrous oxide and oxygen ventilation of the lungs (2:1). After intravenous administration of the drug in a dose of 4 mg/kg its maximum concentration (about 8 gamma/ml) was recorded in 5 minutes and the amount eliminated during 2 hours of observation comprised 1--2 per cent of the dose introduced. In practically healthy individuals with no anesthesia the pharmacokinetics of azabutyron lies within the limits of a bicompartment pharmacokinetics model, while surface anesthesia, blood loss changes the pharmacokinetics of the drug to such an extent that is has to be described from the standpoint of the unicompartment model system.
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Havlik J, Holý M, Hauznerovă S. [Levels of amoxycillin after a single administration of higher dosage. (Amoxycillin SPOFA 500 mg. tablets)]. Cesk Pediatr 1977; 32:244-6. [PMID: 872257] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/24/2022]
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Havlik J, Holý M. [Erythromycin stearate Spofa--coated tablets for pediatric practice]. Cesk Pediatr 1976; 31:402-4. [PMID: 963828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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Havlik J, Kubecová D, Pánek V, Fojtík F. [Congenital cyst of the biliary tract as the cause of carrier state of S. paratyphi B in a child]. Cesk Pediatr 1969; 24:62-4. [PMID: 5772993] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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Havlik J, Pánek V. [Experience with combined surgical treatment of habitual salmonella excretors]. Med Welt 1968; 9:556-60. [PMID: 5719390] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 01/16/2023]
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