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Zhu Y, Cheng T, Liu C, Xu M, Huang Z, Wang D, Guo Z, Wang Z. Structural characteristics and emulsifying properties of linear dextrin/eicosapentaenoic acid composites: Effect of the degree of polymerization. Int J Biol Macromol 2024; 270:131889. [PMID: 38782624 DOI: 10.1016/j.ijbiomac.2024.131889] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2023] [Revised: 04/14/2024] [Accepted: 04/24/2024] [Indexed: 05/25/2024]
Abstract
This work aimed at building functional emulsions based on the linear dextrins (LDs) emulsion system. The gradient polyethylene glycol (PEG) precipitaion method was used to fractionate LDs into fractions with different degrees of polymerization (DP). A package, and co-precipitation procedure of LDs, and eicosapentaenoic acid (EPA) was used to fabricate LDs-EPA composites. The gas chromatograph, Fourier transform infrared spectroscopy, X-ray diffraction and differential scanning calorimetry analyses affirmed the formation of the LDs-EPA composites. The sizes of these composites were 38.55 nm, 59.14 nm to 80.62 nm, respectively, and they had good amphiphilicity. Compared with LDs, these LDs-EPA composites stabilized Pickering emulsion had higher stability and antioxidant capacity. Their emulsifying ability was positively correlated with the DP values of LDs. Furthermore, the oxidation stability results showed that LDsF10-EPA emulsion had the lowest lipid hydroperoxide (LHs) content, malondioxide (MDA) content and hexal concentration, which were 138.75 mmol kg-1 oil, 15.50 mmol kg-1 oil and 3.83 μmol kg-1 oil, respectively. The study provided a new idea and application values for the application of LDs in emulsion.
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Affiliation(s)
- Yuechun Zhu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Tianfu Cheng
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Caihua Liu
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China
| | - Minwei Xu
- Department of Plant Sciences, North Dakota State University, Fargo, ND 58108, USA
| | - Zhaoxian Huang
- College of Food Science and Engineering, Hainan University, Haikou 570228, China
| | - Daoying Wang
- Institute of Agricultural Products Processing, Jiangsu Academy of Agricultural Sciences, Nanjing 210014, China
| | - Zengwang Guo
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China.
| | - Zhongjiang Wang
- College of Food Science, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China.
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Zhan W, Yuan C, Cui B, Yu B, Liu P, Wu Z, Zhao H. Effect of chain length on the structure and physicochemical properties of active compound/linear dextrin composites. Carbohydr Polym 2021; 269:118304. [PMID: 34294321 DOI: 10.1016/j.carbpol.2021.118304] [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: 01/12/2021] [Revised: 05/31/2021] [Accepted: 06/01/2021] [Indexed: 10/21/2022]
Abstract
Three linear dextrins (LDs) with different chain length were obtained through fractionating short-chain LD by gradient precipitation with 65%, 70% and 75% alcohol, signed as 65LD, 70LD, and 75LD, respectively. The LDs were employed to encapsulate arachidonic acid (ARA) and geranic acid (GA). Fourier infrared spectrometry, differential scanning calorimetry and thermogravimetric analysis confirmed the formation of ARA/LD and GA/LD composites. The ARA/65LD and GA/75LD composites showed higher crystallinity, indicating the formation of more ordered and compact structures in ARA/65LD and GA/75LD composites. The micromorphology of ARA/65LD composite was a clear ellipsoidal like structure, whereas GA/75LD composite presented a spherical shape. The release behavior, thermal, photochemical and antioxidant abilities of ARA and GA were improved after forming composites. Overall, the longer chain LD displayed better encapsulation efficiency with the longer chain ARA, while the shorter chain LD had higher encapsulation capability with GA.
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Affiliation(s)
- Wei Zhan
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Chao Yuan
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China.
| | - Bo Cui
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Bin Yu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Pengfei Liu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Zhengzong Wu
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
| | - Haibo Zhao
- State Key Laboratory of Biobased Material and Green Papermaking, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China; School of Food Science and Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan 250353, China
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Escobar-García JD, Prieto C, Pardo-Figuerez M, Lagaron JM. Room Temperature Nanoencapsulation of Bioactive Eicosapentaenoic Acid Rich Oil within Whey Protein Microparticles. NANOMATERIALS (BASEL, SWITZERLAND) 2021; 11:575. [PMID: 33668857 PMCID: PMC7996356 DOI: 10.3390/nano11030575] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/20/2021] [Revised: 02/22/2021] [Accepted: 02/23/2021] [Indexed: 01/10/2023]
Abstract
In this study, emulsion electrospraying assisted by pressurized gas (EAPG) has been performed for the first time to entrap ca. 760 nm droplets of the bioactive eicosapentaenoic acid (EPA)-rich oil into whey protein concentrate (WPC) at room temperature. The submicron droplets of EPA oil were encapsulated within WPC spherical microparticles, with sizes around 5 µm. The EPA oil did not oxidize in the course of the encapsulation performed at 25 °C and in the presence of air, as corroborated by the peroxide value measurements. Attenuated Total Reflection-Fourier Transform Infrared spectroscopy and oxygen consumption tests confirmed that the encapsulated EPA-rich oil showed increased oxidative stability in comparison with the free oil during an accelerated oxidation test under ultraviolet light. Moreover, the encapsulated EPA-rich oil showed increased thermal stability in comparison with the free oil, as measured by oxidative thermogravimetric analysis. The encapsulated EPA-rich oil showed a somewhat reduced organoleptic impact in contrast with the neat EPA oil using rehydrated powdered milk as a reference. Finally, the oxidative stability by thermogravimetric analysis and organoleptic impact of mixtures of EPA and docosahexaenoic acid (DHA)-loaded microparticles was also studied, suggesting an overall reduced organoleptic impact compared to pure EPA. The results here suggest that it is possible to encapsulate 80% polyunsaturated fatty acids (PUFAs)-enriched oils by emulsion EAPG technology at room temperature, which could be used to produce personalized nutraceuticals or pharmaceuticals alone or in combination with other microparticles encapsulating different PUFAs to obtain different targeted health and organoleptic benefits.
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Affiliation(s)
- Juan David Escobar-García
- Research & Development Department, Bioinicia S.L., Calle Algepser 65, 46980 Paterna, Spain; (J.D.E.-G.); (M.P.-F.)
| | - Cristina Prieto
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Spain
| | - Maria Pardo-Figuerez
- Research & Development Department, Bioinicia S.L., Calle Algepser 65, 46980 Paterna, Spain; (J.D.E.-G.); (M.P.-F.)
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Spain
| | - Jose M. Lagaron
- Novel Materials and Nanotechnology Group, Institute of Agrochemistry and Food Technology (IATA), Spanish Council for Scientific Research (CSIC), Calle Catedrático Agustín Escardino Benlloch 7, 46980 Paterna, Spain
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Truzzi C, Giorgini E, Annibaldi A, Antonucci M, Illuminati S, Scarponi G, Riolo P, Isidoro N, Conti C, Zarantoniello M, Cipriani R, Olivotto I. Fatty acids profile of black soldier fly (Hermetia illucens): Influence of feeding substrate based on coffee-waste silverskin enriched with microalgae. Anim Feed Sci Technol 2020. [DOI: 10.1016/j.anifeedsci.2019.114309] [Citation(s) in RCA: 44] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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Grape Seeds: Chromatographic Profile of Fatty Acids and Phenolic Compounds and Qualitative Analysis by FTIR-ATR Spectroscopy. Foods 2019; 9:foods9010010. [PMID: 31877706 PMCID: PMC7023066 DOI: 10.3390/foods9010010] [Citation(s) in RCA: 55] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 12/11/2019] [Accepted: 12/18/2019] [Indexed: 12/22/2022] Open
Abstract
The primary product of the oenological sector is wine. Nonetheless, the grape processing produces large amounts of by-products and wastes, e.g., the grape seeds. In the context of a sustainable production, there is a strong push towards reutilizing these by-products and waste for making useful derivatives since they are rich of bioactive substances with high additional value. As it is true for the wine itself, bringing these by-products derivatives to the market calls for quality measures and analytical tools to assess quality itself. One of the main objectives is to collect analytical data regarding bioactive compounds using potentially green techniques. In the present work, the profile of fatty acids and the main phenolic compounds were investigated by conventional methods. The qualitative analysis of the main functional groups was carried out by Fourier Transform Infrared (FTIR) spectroscopy. Moreover, the successful use of FTIR technique in combination with chemometric data analysis is shown to be a suitable analytical tool for discriminating the grape seeds. Grape seeds of different origin have different content of bioactive substances, making this technique useful when planning to recover a certain substance with specific potential application in health area as food supplement or nutraceutical. For example, Cesanese d’Affile seeds were found to have a rather high fat content with a significant fraction of unsaturated fatty acids. On the other hand, the seeds of Nero d’Avola exhibit the highest amount of phenolic compounds.
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Identification of Passion Fruit Oil Adulteration by Chemometric Analysis of FTIR Spectra. Molecules 2019; 24:molecules24183219. [PMID: 31487942 PMCID: PMC6767306 DOI: 10.3390/molecules24183219] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2019] [Revised: 09/01/2019] [Accepted: 09/03/2019] [Indexed: 12/03/2022] Open
Abstract
Passion fruit oil is a high-value product with applications in the food and cosmetic sectors. It is frequently diluted with sunflower oil. Sunflower oil is also a potential adulterant as its addition does not notably alter the appearance of the passion fruit oil. In this paper, we show that this is also true for the FTIR spectrum. However, the chemometric analysis of the data changes this situation. Principal component analysis (PCA) enables not only the straightforward discrimination of pure passion fruit oil and adulterated samples but also the unambiguous classification of passion fruit oil products from five different manufacturers. Even small amounts—significantly below 1%—of the adulterant can be detected. Furthermore, partial least-squares regression (PLSR) facilitates the quantification of the amount of sunflower oil added to the passion fruit oil. The results demonstrate that the combination of FTIR spectroscopy and chemometric data analysis is a very powerful tool to analyze passion fruit oil.
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Gocen T, Bayarı SH, Guven MH. Effects of chemical structures of omega-6 fatty acids on the molecular parameters and quantum chemical descriptors. J Mol Struct 2018. [DOI: 10.1016/j.molstruc.2018.04.075] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022]
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8
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Lucarini M, Durazzo A, Sánchez del Pulgar J, Gabrielli P, Lombardi-Boccia G. Determination of fatty acid content in meat and meat products: The FTIR-ATR approach. Food Chem 2018; 267:223-230. [DOI: 10.1016/j.foodchem.2017.11.042] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2017] [Revised: 06/27/2017] [Accepted: 11/10/2017] [Indexed: 10/18/2022]
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9
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Gocen T, Bayari SH, Guven MH. Conformational and vibrational studies of arachidonic acid, light and temperature effects on ATR-FTIR spectra. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2018; 203:263-272. [PMID: 29879641 DOI: 10.1016/j.saa.2018.05.100] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 05/25/2018] [Accepted: 05/27/2018] [Indexed: 06/08/2023]
Abstract
Arachidonic acid (AA) (cis,cis,cis,cis-5,8,11,14-Eicosatetraenoic acid) is an omega-6 polyunsaturated fatty acid (PUFA) constituent of the phospholipids of cell membranes. The conformational behavior of AA in the gas phase was investigated by means of density functional theory (DFT) using B3LYP method with 6-311++G(d,p) basis set. Theoretical calculations on the structures and infrared spectra of monomer conformers and dimer form of the most stable monomer conformer of AA were performed. Vibrational assignment of the fundamental modes was made based on calculated potential energy distribution (PED). Attenuated Total Reflectance Fourier Transform Infrared (ATR-FTIR) spectrum of AA in liquid phase was recorded in the region 4000-450 cm-1. The theoretical spectrum of dimer AA in gas phase is in reasonably good agreement with the experimental liquid phase spectrum. The double bonds in unsaturated fatty acids are prone to oxidation. Oxidized PUFAs lead to adverse health effects. The effects of daylight and temperature on the oxidative stability of AA were investigated using ATR-FTIR spectroscopy. The analysis reveals that the light and thermal treatment induce cis-trans isomerization in AA.
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Affiliation(s)
- Tuğba Gocen
- Bülent Ecevit University, Department of Physics, 67100 Zonguldak, Turkey
| | - Sevgi Haman Bayari
- Hacettepe University, Department of Physics Eng., 06800 Beytepe-Ankara, Turkey.
| | - Mehmet Haluk Guven
- Bülent Ecevit University, Department of Physics, 67100 Zonguldak, Turkey
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de Toledo-Piza AR, de Oliveira MI, Negri G, Mendonça RZ, Figueiredo CA. Polyunsaturated fatty acids from Phyllocaulis boraceiensis mucus block the replication of influenza virus. Arch Microbiol 2018; 200:961-970. [PMID: 29616305 DOI: 10.1007/s00203-018-1507-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2017] [Revised: 03/24/2018] [Accepted: 03/27/2018] [Indexed: 01/09/2023]
Abstract
Influenza viruses cause worldwide outbreaks and pandemics in humans and animals every year with considerable morbidity and mortality. The molecular diversity of secondary metabolites extracted from mollusks is a good alternative for the discovery of novel bioactive compounds with unique structures and diverse biological activities. Phyllocaulis boraceiensis is a hermaphroditic slug that exudes mucus, in which was detected hydroxy polyunsaturated fatty acids that exhibited potent antiviral activity against measles virus. The objective of this study was to evaluate this property against Influenza viruses. Cell viability and toxicity of the mucus were evaluated on Madin-Darby canine kidney (MDCK) cells by MTT assay. Antiviral activity from mucus against influenza viruses was carried out by determination of the virus infection dose and by immunofluorescence assays. The crude mucus and its fractions exhibited low cytotoxicity on MDCK cells. A significant inhibition of viral replication, reduced by the order of eight times, was observed in influenza-induced cytopathic effect. In immunofluorescence assay was observed a decrease of more than 80% of the viral load on infected MDCK cell treated with mucus and its fractions. The viral glycoproteins hemagglutinin and neuraminidase located on the surface of the virus are crucial for the replications and infectivity of the influenza virus. Some authors demonstrated that lipids, such as, polyunsaturated fatty acids exhibited multiple roles in antiviral innate and adaptive responses, control of inflammation, and in the development of antiviral therapeutics. As corroborated by other studies, hydroxy polyunsaturated fatty acids interfered with the binding of influenza virus on host cell receptor and reduced viral titers. The results obtained indicated that polyunsaturated fatty acids from P. boraceiensis crude mucus and fractions 39 exerted antiviral activity against influenza virus.
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Affiliation(s)
- Ana Rita de Toledo-Piza
- Laboratory of Parasitology, Butantan Institute, 1500th, Vital Brazil Ave, São Paulo, SP, Brazil.
| | - Maria Isabel de Oliveira
- Respiratory Infectious Diseases, Adolfo Lutz Institute, 355th, Doutor Arnaldo Ave, São Paulo, SP, Brazil
| | - Giuseppina Negri
- Department of Preventive Medicine, Federal University of São Paulo, 740th, Botucatu St., São Paulo, SP, Brazil
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Oshakbayev K, Dukenbayeva B, Togizbayeva G, Gazaliyeva M, Syzdykova A, Daurenbekov K, Issa P. Accumulated substancies and calorific capacity in adipose tissue: Physical and chemical clinical trial. BBA CLINICAL 2017. [PMID: 28626640 PMCID: PMC5466547 DOI: 10.1016/j.bbacli.2017.05.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
Aim To study physical and chemical structures and properties including calorific value of human adipose tissue in different anatomical location in autopsy-assigned clinical trial. Methods A pilot physical and chemical descriptive randomized autopsy-assigned trial. Adipose tissue 252 sampled from 36 individuals at autopsy who between 36 and 63 years old died from road accidents. Interventions: Chemical functional groups and calorific value were studied using infrared and atomic adsorptive spectrometries, elemental chemical analysis and differential scanning calorimetry. Adipose tissue was sampled from the 7 various anatomical locations. Results The highest levels of the analysed chemical substancies were found in dense atherosclerotic plaque. Dense atherosclerotic plaque contains the most of metabolic products, organic and inorganic elements. Dense atherosclerotic plaque has the most of calorific value. The lowest calorific capacity has a pararenal fat. Conclusions Human body lipids serve as a harbor for various organic substances, they may absorb different metabolic products, and they have different calorific capacity depending on their location and forms. Atherosclerotic plaque contains the most of organic and inorganic elements, and brings the highest energy potential. The body adipose tissue is heterogeneous in content and in property. Atherosclerosis plaque contains the largest amount of organic/inorganic functional groups. Atherosclerosis plaque is a harbor for various organic substances. Adipose tissue has different calorific capacity depending on its locations and forms. Plaques bring the highest of energy potential in compare to other fats.
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Affiliation(s)
| | | | | | | | - Alma Syzdykova
- Nazarbayev University Medical Center, Astana, Kazakhstan
| | | | - Pernekul Issa
- Kazakh University for technology and business, Astana, Kazakhstan
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Toledo-Piza ARD, Figueiredo CA, Oliveira MID, Negri G, Namiyama G, Tonelotto M, Villar KDS, Rofatto HK, Mendonça RZ. The antiviral effect of mollusk mucus on measles virus. Antiviral Res 2016; 134:172-181. [PMID: 27623346 DOI: 10.1016/j.antiviral.2016.09.005] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2016] [Revised: 08/16/2016] [Accepted: 09/09/2016] [Indexed: 11/25/2022]
Abstract
Measles is a viral disease highly contagious spread by respiratory transmission. Although infection can be controlled by vaccination, numerous cases of measles have been registered in many areas of the world, highlighting the need for additional interventions. Terrestrial gastropods exude mucus on their body surface when traveling, to protect the body from mechanical injury, desiccation or contact with harmful substances. The mucus of mollusks has been studied as a source of new natural compounds with diverse biological activities. In this study, the antiviral activity of the mucus of the land slug P. boraceiensis was demonstrated in vitro using Vero cells infected with measles virus. The crude sample and four fractions were tested in cultures infected with measles virus and the antiviral activity was assessed by the cytopathic effect in infected cell cultures as well as by immunofluorescence and qPCR. Fractions 39 and 50 of the mucus from P. boraceiensis were analyzed by HPLC-DAD-ESI-MS/MS and infrared spectroscopy. A mixture of polyunsaturated fatty acids was found in the two fractions. A reduction in the growth of the measles virus was observed, measured by qPCR, with a protection index of 80% in Vero cells infected with measles and treated with fraction 39. Fraction 39 exhibited the best antiviral action in vitro and high contents of hydroxy-tritriacontapentaenoic acid and hydroxy-pentatriacontapentaenoic acid were found in this fraction.
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Affiliation(s)
- Ana Rita de Toledo-Piza
- Laboratory of Parasitology, Butantan Institute, 1500th, Vital Brazil Ave, São Paulo, SP, Brazil.
| | | | - Maria Isabel de Oliveira
- Respiratory Infectious Diseases, Adolfo Lutz Institute, 355th, Doutor Arnaldo Ave, São Paulo, SP, Brazil
| | - Giuseppina Negri
- Department of Preventive Medicine, Federal University of São Paulo, 740th, Botucatu St., São Paulo, SP, Brazil
| | - Gislene Namiyama
- Electron Microscopy Center, Adolfo Lutz Institute, 355th, Doutor Arnaldo Ave, São Paulo, SP, Brazil
| | - Mariana Tonelotto
- Laboratory of Parasitology, Butantan Institute, 1500th, Vital Brazil Ave, São Paulo, SP, Brazil
| | - Karina de Senna Villar
- Laboratory of Parasitology, Butantan Institute, 1500th, Vital Brazil Ave, São Paulo, SP, Brazil
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Kiefer J, Frank K, Zehentbauer FM, Schuchmann HP. Infrared Spectroscopy of Bilberry Extract Water-in-Oil Emulsions: Sensing the Water-Oil Interface. BIOSENSORS-BASEL 2016; 6:13. [PMID: 27089376 PMCID: PMC4931473 DOI: 10.3390/bios6020013] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 02/16/2016] [Revised: 04/06/2016] [Accepted: 04/08/2016] [Indexed: 11/23/2022]
Abstract
Water-in-oil (w/o) emulsions are of great interest in many areas of the life sciences, including food technology, bioprocess engineering, and pharmaceuticals. Such emulsions are complex multi-component systems and the molecular mechanisms which lead to a stable emulsion are yet to be fully understood. In this work, attenuated total reflection (ATR) infrared (IR) spectroscopy is applied to a series of w/o emulsions of an aqueous anthocyanin-rich bilberry extract dispersed in a medium chain triglyceride (MCT) oil phase. The content of the emulsifier polyglycerin-polyricinoleat (PGPR) has been varied systematically in order to investigate whether or not its concentration has an impact on the molecular stabilization mechanisms. The molecular stabilization is accessed by a careful analysis of the IR spectrum, where changes in the vibrational frequencies and signal strengths indicate alterations of the molecular environment at the water/oil interface. The results suggest that adding emulsifier in excess of 1% by weight does not lead to an enhanced stabilization of the emulsion.
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Affiliation(s)
- Johannes Kiefer
- Technische Thermodynamik, Universität Bremen, Badgasteiner Str. 1, Bremen 28359, Germany;
- Erlangen Graduate School in Advanced Optical Technologies, University of Erlangen-Nuremberg, Erlangen 91052, Germany
- School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK
- Correspondence: ; Tel.: +49-421-218-64777
| | - Kerstin Frank
- Section I: Food Process Engineering, Institute of Process Engineering in Life Sciences, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany;
- Present affiliation: BASF SE, Ludwigshafen 67056, Germany;
| | - Florian M. Zehentbauer
- Technische Thermodynamik, Universität Bremen, Badgasteiner Str. 1, Bremen 28359, Germany;
| | - Heike P. Schuchmann
- Section I: Food Process Engineering, Institute of Process Engineering in Life Sciences, Karlsruhe Institute of Technology, Karlsruhe 76131, Germany;
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Vidal NP, Goicoechea E, Manzanos MJ, Guillén MD. Fourier transform infrared spectroscopy as a tool to study farmed and wild sea bass lipid composition. JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE 2014; 94:1340-1348. [PMID: 24834498 DOI: 10.1002/jsfa.6417] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
BACKGROUND The lipids of 16 farmed and wild European sea bass (Dicentrarchus labrax) samples were studied by Fourier transform infrared (FTIR) spectroscopy. The spectroscopic parameters which would be useful when distinguishing between both fish origins were analysed. RESULTS It was shown, for the first time, that the frequency and the ratio between the absorbance of certain bands are efficient and reliable authentication tools for the origin of sea bass. Furthermore, relationships between infrared data and fish lipids composition referring to the molar percentage or concentration of certain acyl groups were also studied. It was proved that some infrared spectroscopic data (the frequency of certain bands or the ratio of the absorbance of others), are very closely related to the composition of sea bass lipids. It was shown for the first time that certain infrared spectroscopic data could predict, with a certain degree of approximation, the molar percentage, or concentration, of omega-3, docosahexaenoic (DHA) and di-unsaturated omega-6 (linoleic) in sea bass lipids. CONCLUSION The consistency of the results confirms the usefulness of FTIR spectroscopy to detect frauds regarding sea bass origin, and to provide important compositional data about sea bass lipids from the nutritional and technological point of view.
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Noack K, Eskofier B, Kiefer J, Dilk C, Bilow G, Schirmer M, Buchholz R, Leipertz A. Combined shifted-excitation Raman difference spectroscopy and support vector regression for monitoring the algal production of complex polysaccharides. Analyst 2014; 138:5639-46. [PMID: 23905163 DOI: 10.1039/c3an01158e] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The applicability of shifted-excitation Raman difference spectroscopy (SERDS) in combination with signal regression analysis as an alternative and non-invasive approach for monitoring the cultivation of phototrophic microorganisms producing complex molecules of pharmaceutical relevance in a bioreactor is demonstrated. As a model system, the cultivation of the red unicellular algae Porphyridium purpureum is used for focusing on the segregation of sulfated exopolysaccharides (EPS) which exhibit antiviral activity. The spectroscopic results obtained by partial linear least squares regression (PLSR) and by nonlinear support vector regression (SVR) are discussed against the corresponding results from the reference analytics based on the phenol-sulfuric acid assay. The SERDS-approach turns out to have strong potential as a non-invasive tool for online-monitoring of biotechnological processes.
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Affiliation(s)
- Kristina Noack
- Institute of Engineering Thermodynamics, University of Erlangen-Nuremberg, Am Weichselgarten 9, 91058 Erlangen, Germany
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Kiefer J, Cöngevel MA, Roth D, Obert K, Wasserscheid P, Leipertz A. Attenuated total reflection infrared difference spectroscopy (ATR-IRDS) for quantitative reaction monitoring. APPLIED SPECTROSCOPY 2012; 66:685-688. [PMID: 22732540 DOI: 10.1366/11-06472] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Monitoring of chemical reactors is key to optimizing yield and efficiency of chemical transformation processes. Aside from tracking pressure and temperature, the measurement of the chemical composition is essential in this context. We present an infrared difference spectroscopy approach for determining the reactant (cyclooctene) and product (cyclooctane) concentrations during a catalytic hydrogenation reaction in the solvent cyclohexane, which is present in large excess. Subtracting the spectrum of the pure solvent from the reactor mixture spectra yields infrared (IR) spectra, which can ultimately be evaluated using a curve-fitting procedure based on spectral soft modeling. An important feature of our evaluation approach is that the calibration only requires recording the pure component spectra of the reactants, products, and solvent. Hence, no time-consuming preparation of mixtures for calibration is necessary. The IR concentration results are in good agreement with gas chromatography measurements.
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Affiliation(s)
- Johannes Kiefer
- School of Engineering, University of Aberdeen, Scotland, UK.
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Struthers HC, Zehentbauer FM, Ono-Sorhue E, Kiefer J. Chemical Composition Monitoring in a Batch Distillation Process Using Raman Spectroscopy. Ind Eng Chem Res 2011. [DOI: 10.1021/ie2015125] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hollie C. Struthers
- School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, Scotland, U.K
| | | | - Ese Ono-Sorhue
- School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, Scotland, U.K
| | - Johannes Kiefer
- School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, Scotland, U.K
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