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Baudron V, Gurikov P, Smirnova I, Whitehouse S. Porous Starch Materials via Supercritical- and Freeze-Drying. Gels 2019; 5:gels5010012. [PMID: 30813640 PMCID: PMC6473257 DOI: 10.3390/gels5010012] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2018] [Revised: 02/06/2019] [Accepted: 02/10/2019] [Indexed: 01/06/2023] Open
Abstract
The production of porous materials based on starch has been explored with supercritical drying—yielding aerogel—and freeze-drying. The two drying procedures were applied on the same gelling solution of amylomaize starch pasted at 140 °C and for two concentrations (5 and 10 wt.%). After gelation and retrogradation, water from the samples to be supercritically dried was exchanged to ethanol. The resulting starch aerogel presented high specific surface area (197 m2/g). Freeze-drying was assessed by investigating the effect of the gelation, retrogradation, freezing temperature, and sublimation pressure. The resulting starch materials were macroporous, with limited specific surface area and limited mechanical integrity. Cohesive open cell foam with pore size of ~20 µm was produced by quenching the hot starch melt in liquid nitrogen. The highest specific surface area obtained with freeze-drying was 7.7 m2/g for the hot starch melt frozen at −20 °C.
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Fellechner O, Rotzolk S, Smirnova I. Long-Chain Alcohol-Modified Micellar Systems and Their Application in a Continuous Extraction Process. Ind Eng Chem Res 2019. [DOI: 10.1021/acs.iecr.8b04617] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Dyshluk L, Dyshluk L, Sukhikh S, Sukhikh S, Ivanova S, Ivanova S, Smirnova I, Smirnova I, Subbotina M, Subbotina M, Pozdnyakova A, Pozdnyakova A, Neverov E, Neverov E, Garmashov S, Garmashov S. Prospects for using pine nut products in the dairy industry. FOODS AND RAW MATERIALS 2018. [DOI: 10.21603/2308-4057-2018-2-264-280] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Abstract: Functional products are currently attracting a lot of research interest. Modern people’s diet does not satisfy their need for nutrients, vitamins and minerals, and functional products can make it more balanced. In particular, our diet is lacking in protein. This paper discusses the prospects for enriching dairy products with plant protein derived from pine nuts and their products. Pine nut paste, fat-free milk, and oil cake are a valuable source of fatty acids, vitamins, and microelements. The protein, lipid, vitamin, and mineral content of these products makes them suitable for combining with milk. Their water-holding and fat-emulsifying capacities allow their use as stabilizers and emulsifiers. Siberian pine nuts grow wild in the Kemerovo Region, which makes their use as a raw material economically feasible. The article introduces a number of functional dairy products enriched with pine nut products, such as cheese, ice cream, and cottage cheese. Further, it describes the production process and the products’ nutritional value. The chemical composition of new types of dairy products shows that using pine nut oil cake, fat-free flour, paste, and oil enriches them with plant proteins, vegetable fats, vitamins as well as macro- and microelements. Replacing dairy raw materials with plants does not reduce the nutritional value of new dairy products. Dairy foods are rich in protein, fat, and minerals. The vitamin content of new dairy products with functional ingredients is similar to that of dairy-based products. Moreover, using functional products (pine nut oil cake, fat-free flour, paste, and oil) enriches new types of dairy products with tocopherols.
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Ganesan K, Budtova T, Ratke L, Gurikov P, Baudron V, Preibisch I, Niemeyer P, Smirnova I, Milow B. Review on the Production of Polysaccharide Aerogel Particles. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E2144. [PMID: 30384442 PMCID: PMC6265924 DOI: 10.3390/ma11112144] [Citation(s) in RCA: 123] [Impact Index Per Article: 20.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 09/07/2018] [Revised: 10/10/2018] [Accepted: 10/23/2018] [Indexed: 02/04/2023]
Abstract
A detailed study of the production of polysaccharide aerogel (bio-aerogel) particles from lab to pilot scale is surveyed in this article. An introduction to various droplets techniques available in the market is given and compared with the lab scale production of droplets using pipettes and syringes. An overview of the mechanisms of gelation of polysaccharide solutions together with non-solvent induced phase separation option is then discussed in the view of making wet particles. The main steps of particle recovery and solvent exchange are briefly described in order to pass through the final drying process. Various drying processes are overviewed and the importance of supercritical drying is highlighted. In addition, we present the characterization techniques to analyse the morphology and properties of the aerogels. The case studies of bio-aerogel (agar, alginate, cellulose, chitin, κ-carrageenan, pectin and starch) particles are reviewed. Potential applications of polysaccharide aerogel particles are briefly given. Finally, the conclusions summarize the prospects of the potential scale-up methods for producing bio-aerogel particles.
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Rege A, Preibisch I, Schestakow M, Ganesan K, Gurikov P, Milow B, Smirnova I, Itskov M. Correlating Synthesis Parameters to Morphological Entities: Predictive Modeling of Biopolymer Aerogels. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1670. [PMID: 30205623 PMCID: PMC6163492 DOI: 10.3390/ma11091670] [Citation(s) in RCA: 20] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/06/2018] [Revised: 08/28/2018] [Accepted: 09/03/2018] [Indexed: 12/15/2022]
Abstract
In the past decade, biopolymer aerogels have gained significant research attention due to their typical properties, such as low density and thermal insulation, which are reinforced with excellent biocompatibility, biodegradability, and ease of functionalization. Mechanical properties of these aerogels play an important role in several applications and should be evaluated based on synthesis parameters. To this end, preparation and characterization of polysaccharide-based aerogels, such as pectin, cellulose and k-carrageenan, is first discussed. An interrelationship between their synthesis parameters and morphological entities is established. Such aerogels are usually characterized by a cellular morphology, and under compression undergo large deformations. Therefore, a nonlinear constitutive model is proposed based on large deflections in microcell walls of the aerogel network. Different sizes of the microcells within the network are identified via nitrogen desorption isotherms. Damage is initiated upon pore collapse, which is shown to result from the failure of the microcell wall fibrils. Finally, the model predictions are validated against experimental data of pectin, cellulose, and k-carrageenan aerogels. Given the micromechanical nature of the model, a clear correlation-qualitative and quantitative-between synthesis parameters and the model parameters is also substantiated. The proposed model is shown to be useful in tailoring the mechanical properties of biopolymer aerogels subject to changes in synthesis parameters.
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Nešić A, Gordić M, Davidović S, Radovanović Ž, Nedeljković J, Smirnova I, Gurikov P. Pectin-based nanocomposite aerogels for potential insulated food packaging application. Carbohydr Polym 2018; 195:128-135. [DOI: 10.1016/j.carbpol.2018.04.076] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Revised: 03/20/2018] [Accepted: 04/19/2018] [Indexed: 12/17/2022]
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Hu X, Fassbender M, Drücker S, Fiedler B, Luinstra G, Smirnova I. Intelligente Reaktoren: Kombination von Stimuli-responsiven Hydrogelen und 3D-Druck. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855177] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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58
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Fellechner O, Smirnova I. Kontinuierliche extraktive Biokatalyse in mizellaren Zweiphasensystemen mit reaktiven Packungen. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855208] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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59
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Baudron V, Gurikov P, Smirnova I. A continuous approach to the aerogel microparticle production via emulsion-gelation method. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855144] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
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60
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Smirnova I, Gurikov P, Weinrich D, Movahhed S, Vogelsang V, Fricke M, Lölsberg W. Entwicklung organischer Aerogele: der Weg von der Akademia in die Praxis. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855365] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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61
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Fellechner O, Breuer M, Smirnova I, Liese A, Gurikov P, Kara S. Enzymatische Umsetzung von Catechol zu 2,3-Dihydroxybenzoesäure mit Amin-postfunktionalisierten Silicagelen. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855317] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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62
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Hu X, Smirnova I. Lignin aus Bioraffinerien basierend auf der Heißwasserhydrolyse und deren Nutzung in Polymercompounds. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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63
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Braeuer A, Gurikov P, Selmer I, Smirnova I. Supercritical drying of aerogels: in situ Raman spectroscopy and development of a predictive model. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855166] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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64
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Andersen L, Conrad M, Gil J, Hu X, Reynolds W, Schmidt L, Hartge E, Häring H, Kreft C, Meyer R, Zetzl C, Heinrich S, Kaltschmitt M, Lim C, Smirnova I. Aufbau einer Vollverwertungskette für ligninhaltige Biomasse über Hochdruckverfahrenstechnik: Neue Produkte durch Extraktion, Hydrolyse, überkritische Trocknung und Extrusion. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201855120] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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65
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Racheva R, Rahlf AF, Wenzel D, Müller C, Kerner M, Luinstra GA, Smirnova I. Aqueous food-grade and cosmetic-grade surfactant systems for the continuous countercurrent cloud point extraction. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2018.03.040] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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66
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Preibisch I, Niemeyer P, Yusufoglu Y, Gurikov P, Milow B, Smirnova I. Polysaccharide-Based Aerogel Bead Production via Jet Cutting Method. MATERIALS (BASEL, SWITZERLAND) 2018; 11:E1287. [PMID: 30044454 PMCID: PMC6117653 DOI: 10.3390/ma11081287] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 06/29/2018] [Revised: 07/23/2018] [Accepted: 07/23/2018] [Indexed: 11/16/2022]
Abstract
The aim of this work is to develop a method to produce spherical biopolymer-based aerogel particles, which is capable for scale-up in the future. Therefore, the jet cutting method is suggested. Amidated pectin, sodium alginate, and chitosan are used as a precursor (a 1⁻3 wt. % solution) for particle production via jet cutting. Gelation is realized via two methods: the internal setting method (using calcium carbonate particles as cross-linkers and citric and acidic acid for pH adjustment) and the diffusion method (in calcium chloride solutions). Gel particles are subjected to solvent exchange to ethanol and consequent supercritical drying with CO₂. Spherical aerogel particles with narrow particle size distributions in the range of 400 to 1500 µm and a specific surface area of around 500 m²/g are produced. Overall, it can be concluded that the jet cutting method is suitable for aerogel particle production, although the shape of the particles is not perfectly spherical in all cases. However, parameter adjustment might lead to even better shaped particles in further work. Moreover, the biopolymer-based aerogel particles synthesized in this study are tested as humidity absorbers in drying units for home appliances, particularly for dishwashers. It has been shown that for several cycles of absorption and desorption of humidity, aerogel particles are stable with an absorption capacity of around 20 wt. %.
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Bueno A, Selmer I, S.P R, Gurikov P, Lölsberg W, Weinrich D, Fricke M, Smirnova I. First Evidence of Solvent Spillage under Subcritical Conditions in Aerogel Production. Ind Eng Chem Res 2018. [DOI: 10.1021/acs.iecr.8b00855] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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68
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Maksimysheva T, Kondratyeva E, Voronkova A, Melyanovskaya Y, Sherman V, Zhekayte E, Chernyak A, Nazarenko L, Odinokova O, Smirnova I, Mukhacheva V, Nikonova V, Shabalova L, Gorinova Y, Simonova O, Usacheva M, Zonenko O, Semykin S, Mukhina M, Lavrova A, Erzutova M, Baykova G, Kozyreva L, Boytsova E, Moskvina D, Stepanenko T, Gembitskaya T, Amelina E, Kashirskaya N, Krasovsky S. P201 Features of somatic growth of children with CF in different age periods in the Russian Federation. J Cyst Fibros 2018. [DOI: 10.1016/s1569-1993(18)30496-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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69
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Veres P, Sebők D, Dékány I, Gurikov P, Smirnova I, Fábián I, Kalmár J. A redox strategy to tailor the release properties of Fe(III)-alginate aerogels for oral drug delivery. Carbohydr Polym 2018. [DOI: 10.1016/j.carbpol.2018.01.098] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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70
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Smirnova I, Gurikov P. Aerogel production: Current status, research directions, and future opportunities. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.12.037] [Citation(s) in RCA: 97] [Impact Index Per Article: 16.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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71
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Reynolds W, Smirnova I. Hydrothermal flow-through treatment of wheat straw: Coupled heat and mass transfer modeling with changing bed properties. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.08.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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72
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Gurikov P, Smirnova I. Non-Conventional Methods for Gelation of Alginate. Gels 2018; 4:E14. [PMID: 30674790 PMCID: PMC6318612 DOI: 10.3390/gels4010014] [Citation(s) in RCA: 65] [Impact Index Per Article: 10.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/22/2017] [Revised: 01/25/2018] [Accepted: 01/26/2018] [Indexed: 11/21/2022] Open
Abstract
This review presents and critically evaluates recent advances in non-conventional gelation method of native alginate. A special focus is given to the following three methods: cryotropic gelation, non-solvent induced phase separation and carbon dioxide induced gelation. A few other gelation approaches are also briefly reviewed. Results are discussed in the context of subsequent freeze and supercritical drying. The methods are selected so as to provide the readers with a range of novel tools and tactics of pore engineering for alginate and other anionic polysaccharides.
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Gurikov P, Smirnova I. Amorphization of drugs by adsorptive precipitation from supercritical solutions: A review. J Supercrit Fluids 2018. [DOI: 10.1016/j.supflu.2017.03.005] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
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74
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Koneva AS, Ritter E, Anufrikov YA, Lezov AA, Klestova AO, Smirnova NA, Safonova EA, Smirnova I. Mixed aqueous solutions of nonionic surfactants Brij 35/Triton X-100: Micellar properties, solutes' partitioning from micellar liquid chromatography and modelling with COSMOmic. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2017.10.044] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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75
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Ritter E, Smirnova I. Continuous Countercurrent Extractive Biocatalysis in Aqueous Surfactant Two-Phase Systems. CHEM-ING-TECH 2018. [DOI: 10.1002/cite.201700054] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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76
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Racheva R, Tietgens N, Kerner M, Smirnova I. In situ continuous countercurrent cloud point extraction of microalgae cultures. Sep Purif Technol 2018. [DOI: 10.1016/j.seppur.2017.08.066] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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77
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Yordanova D, Ritter E, Smirnova I, Jakobtorweihen S. Micellization and Partition Equilibria in Mixed Nonionic/Ionic Micellar Systems: Predictions with Molecular Models. LANGMUIR : THE ACS JOURNAL OF SURFACES AND COLLOIDS 2017; 33:12306-12316. [PMID: 28967760 DOI: 10.1021/acs.langmuir.7b02813] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/07/2023]
Abstract
In practical applications, surfactant solutions are mostly used in mixtures of nonionic and ionic surfactants because they have improved characteristics compared to those of single surfactant solutions. By adjusting the composition of the micelles and the pH value, the solubilization of solutes can be enhanced. Nevertheless, the partitioning of solutes between nonionic/ionic mixed micelles and the aqueous phase is studied to a much lesser extent than for single surfactant solutions. Theoretical methods to predict partition equilibria in mixed micelles are of interest for screening studies. For those, the composition of the mixed micelle has to be known. Here we investigate mixtures of TX-114 (Triton X-114), Brij35 (C12E23), SDS (sodium dodecyl sulfate), and CTAB (cetyltrimethylammonium bromide). First, to investigate the surfactant compositions in the micelles, molecular dynamics (MD) self-assembly simulations were applied. Thereafter, the predictive COSMO-RS model, which applies the pseudophase approach, and its extension to anisotropic systems termed COSMOmic were compared for the prediction of partition equilibria in mixed micelles, where various molar ratios of the surfactants were considered. It could be demonstrated that both methods are applicable and lead to reasonable predictions for neutral molecules. However, taking into account the three-dimensional structure of the micelle is beneficial because the calculations with COSMOmic are in better agreement with experimental results. Because the partitioning behavior of ionizable molecules in mixed micelles is of particular interest, the partitioning of ionized isovanillin in mixed Brij35/CTAB micelles at different micelle compositions was calculated with COSMOmic. Using a thermodynamic cycle, the position-dependent pKa of isovanillin within the micelle is calculated on the basis of COSMOmic free energy profiles. As a result, the protolytic equilibrium of isovanillin within the micelles can be taken into account, which is crucial for the reliable prediction of partition coefficients.
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Gerlach T, Müller S, Smirnova I. Development of a COSMO-RS based model for the calculation of phase equilibria in electrolyte systems. AIChE J 2017. [DOI: 10.1002/aic.15875] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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79
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Smirnova I, Gurikov P. Aerogels in Chemical Engineering: Strategies Toward Tailor-Made Aerogels. Annu Rev Chem Biomol Eng 2017; 8:307-334. [DOI: 10.1146/annurev-chembioeng-060816-101458] [Citation(s) in RCA: 110] [Impact Index Per Article: 15.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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80
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Yordanova D, Ritter E, Gerlach T, Jensen JH, Smirnova I, Jakobtorweihen S. Solute Partitioning in Micelles: Combining Molecular Dynamics Simulations, COSMOmic, and Experiments. J Phys Chem B 2017; 121:5794-5809. [DOI: 10.1021/acs.jpcb.7b03147] [Citation(s) in RCA: 25] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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81
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Kühn S, Sluyter G, Christlieb MA, Heils R, Stöbener A, Kleber J, Smirnova I, Liese A. In Situ Separation of the Chiral Target Compound ( S)-2-Pentanol in Biocatalytic Reactive Distillation. Ind Eng Chem Res 2017. [DOI: 10.1021/acs.iecr.7b01163] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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82
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Ritter E, Racheva R, Jakobtorweihen S, Smirnova I. Influence of d -glucose as additive on thermodynamics and physical properties of aqueous surfactant two-phase systems for the continuous micellar extraction. Chem Eng Res Des 2017. [DOI: 10.1016/j.cherd.2017.02.032] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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83
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Abstract
Galactoside/H+ symport by the lactose permease of Escherichia coli (LacY) involves reciprocal opening and closing of periplasmic and cytoplasmic cavities so that sugar- and H+-binding sites become alternatively accessible to either side of the membrane. After reconstitution into proteoliposomes, LacY with the periplasmic cavity sealed by cross-linking paired-Cys residues does not bind sugar from the periplasmic side. However, reduction of the S-S bond restores opening of the periplasmic cavity and galactoside binding. Furthermore, nanobodies that stabilize the double-Cys mutant in a periplasmic-open conformation and allow free access of galactoside to the binding site do so only after reduction of the S-S bond. In contrast, when cross-linked LacY is solubilized in detergent, galactoside binding is observed, indicating that the cytoplasmic cavity is patent. Sugar binding from the cytoplasmic side exhibits nonlinear stopped-flow kinetics, and analysis reveals a two-step process in which a conformational change precedes binding. Because the cytoplasmic cavity is spontaneously closing and opening in the symporter with a sealed periplasmic cavity, it is apparent that an asymmetrical conformational transition controls access of sugar to the binding site.
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Kehili M, Kammlott M, Choura S, Zammel A, Zetzl C, Smirnova I, Allouche N, Sayadi S. Supercritical CO 2 extraction and antioxidant activity of lycopene and β-carotene-enriched oleoresin from tomato ( Lycopersicum esculentum L.) peels by-product of a Tunisian industry. FOOD AND BIOPRODUCTS PROCESSING 2017. [DOI: 10.1016/j.fbp.2017.02.002] [Citation(s) in RCA: 50] [Impact Index Per Article: 7.1] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/31/2023]
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85
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Kazan A, Heymuth M, Karabulut D, Akay S, Yildiz-Ozturk E, Onbas R, Muderrisoglu C, Sargin S, Heils R, Smirnova I, Yesil-Celiktas O. Formulation of organic and inorganic hydrogel matrices for immobilization of β-glucosidase in microfluidic platform. Eng Life Sci 2017; 17:714-722. [PMID: 32624816 DOI: 10.1002/elsc.201600218] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/15/2016] [Revised: 12/21/2016] [Accepted: 01/17/2017] [Indexed: 11/10/2022] Open
Abstract
The aim of this study was to formulate silica and alginate hydrogels for immobilization of β-glucosidase. For this purpose, enzyme kinetics in hydrogels were determined, activity of immobilized enzymes was compared with that of free enzyme, and structures of silica and alginate hydrogels were characterized in terms of surface area and pore size. The addition of polyethylene oxide improved the mechanical strength of the silica gels and 68% of the initial activity of the enzyme was preserved after immobilizing into tetraethyl orthosilicate-polyethylene oxide matrix where the relative activity in alginate beads was 87%. The immobilized β-glucosidase was loaded into glass-silicon-glass microreactors and catalysis of 4-nitrophenyl β-d-glucopyranoside was carried out at various retention times (5, 10, and 15 min) to compare the performance of silica and alginate hydrogels as immobilization matrices. The results indicated that alginate hydrogels exhibited slightly better properties than silica, which can be utilized for biocatalysis in microfluidic platforms.
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von Ballmoos C, Smirnova I, Poiana F, Gonska N, Chang HY, Gennis RB, Brzezinski P, Ädelroth P. Dynamics of the KBProton Pathway in Cytochromeba3fromThermus thermophilus. Isr J Chem 2017. [DOI: 10.1002/ijch.201600136] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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Akay S, Heils R, Trieu HK, Smirnova I, Yesil-Celiktas O. An injectable alginate-based hydrogel for microfluidic applications. Carbohydr Polym 2017; 161:228-234. [PMID: 28189233 DOI: 10.1016/j.carbpol.2017.01.004] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/27/2016] [Revised: 12/28/2016] [Accepted: 01/03/2017] [Indexed: 01/15/2023]
Abstract
The objective of this study was to develop an injectable alginate based formulation for immobilizing enzymes into microfluidic systems. The gelation was induced upon lowering the pH by addition of d-glucono-δ-lactone (GDL) and release of Ca+ ions from solid CaCO3. The effects of GDL concentration on enzymatic activity and gelation time were investigated. The results indicated that increasing the GDL concentration increased both surface area and enzymatic activity. Also, chitosan was added to the formulation at different ratios to enhance the stability of enzyme during immobilization. For microfluidic application, 100μl spiral coil single channel microchip was fabricated and alginate GDL mixture containing β-glucosidase was injected to the microchannel prior to gelation. Enzymatic conversion was performed by pumping substrate (pNPG) through the microchannel. The results indicated that the entire substrate was converted continuously during 24h without any leakage or deactivation of immobilized enzyme.
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Kehili M, Schmidt LM, Reynolds W, Zammel A, Zetzl C, Smirnova I, Allouche N, Sayadi S. Biorefinery cascade processing for creating added value on tomato industrial by-products from Tunisia. BIOTECHNOLOGY FOR BIOFUELS 2016; 9:261. [PMID: 27980671 PMCID: PMC5133755 DOI: 10.1186/s13068-016-0676-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/21/2016] [Accepted: 11/24/2016] [Indexed: 05/27/2023]
Abstract
BACKGROUND In today's consumer perception of industrial processes and food production, aspects like food quality, human health, environmental safety, and energy security have become the keywords. Therefore, much effort has been extended toward adding value to biowastes of agri-food industries through biorefinery processing approaches. This study focused, for the first time, on the valorization of tomato by-products of a Tunisian industry for the recovery of value-added compounds using biorefinery cascade processing. RESULTS The process integrated supercritical CO2 extraction of carotenoids within the oil fractions from tomato seeds (TS) and tomato peels (TP), followed by a batch isolation of protein from the residues. The remaining lignocellulosic matter from both fractions was then submitted to a liquid hot water (LHW) hydrolysis. Supercritical CO2 experiments extracted 5.79% oleoresin, 410.53 mg lycopene/kg, and 31.38 mg β-carotene/kg from TP and 26.29% oil, 27.84 mg lycopene/kg, and 5.25 mg β-carotene/kg from TS, on dry weights. Protein extraction yields, nearing 30% of the initial protein contents equal to 13.28% in TP and 39.26% in TS, revealed that TP and TS are a rich source of essential amino acids. LHW treatment run at 120-200 °C, 50 bar for 30 min showed that a temperature of 160 °C was the most convenient for cellulose and hemicellulose hydrolysis from TP and TS, while keeping the degradation products low. CONCLUSIONS Results indicated that tomato by-products are not only a green source of lycopene-rich oleoresin and tomato seed oil (TSO) and of protein with good nutritional quality but also a source of lignocellulosic matter with potential for bioethanol production. This study would provide an important reference for the concept and the feasibility of the cascade fractionation of valuable compounds from tomato industrial by-products.Graphical abstractSchema of biorefinery cascade processing of tomato industrial by-products toward isolation of valuable fractions.
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Gonçalves V, Gurikov P, Poejo J, Matias A, Heinrich S, Duarte C, Smirnova I. Alginate-based hybrid aerogel microparticles for mucosal drug delivery. Eur J Pharm Biopharm 2016; 107:160-70. [DOI: 10.1016/j.ejpb.2016.07.003] [Citation(s) in RCA: 76] [Impact Index Per Article: 9.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2015] [Revised: 05/23/2016] [Accepted: 07/01/2016] [Indexed: 01/15/2023]
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Subrahmanyam R, Gurikov P, Dieringer P, Sun M, Smirnova I. Correction: Raman Subrahmanyam, et al. On the Road to Biopolymer Aerogels-Dealing with the Solvent. Gels 2015, 1, 291-313. Gels 2016; 2:21. [PMID: 31265718 PMCID: PMC6318589 DOI: 10.3390/gels2030021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/02/2016] [Accepted: 08/03/2016] [Indexed: 11/26/2022] Open
Abstract
[This corrects the article DOI: 10.3390/gels1020291.].
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Ritter E, Smirnova I. Kontinuierliche extraktive Biokatalyse in wässrigen mizellaren Zweiphasensystemen. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650086] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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92
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Kühn S, Heils R, Sluyter G, Christlieb MA, Smirnova I, Liese A. Simultane Reaktion und Produktabtrennung in der Biokatalyse: Enzymatische Reaktivrektifikation zur Synthese chiraler Produkte. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650246] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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93
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Schmidt L, Kaltschmitt M, Smirnova I. Wirtschaftliches Potenzial der Integration der Lävulinsäuresynthese in Bioraffinerien basierend auf der Heißwasserhydrolyse. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650287] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
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94
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Smirnova I, Gurikov P, Tschernjaew J, Kachel S. Hochporöse silicabasierte Partikel als Träger für Wirkstoffe: Herstellung, Charakterisierung und neueste Anwendungen. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650189] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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95
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Christlieb MA, Kühn S, Heils R, Stöbener A, Smirnova I, Liese A. Ortsaufgelöste Analytik in der enzymkatalysierten Reaktivrektifikation. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650286] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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96
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Goslinska M, Heinrich S, Selmer I, Smirnova I, Kleemann C, Kulozik U. Coating of Protein-Based Aerogels Using Spouted-Bed Technology. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201650313] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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97
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Barros A, Quraishi S, Martins M, Gurikov P, Subrahmanyam R, Smirnova I, Duarte ARC, Reis RL. Hybrid Alginate-Based Cryogels for Life Science Applications. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201600096] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
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98
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Reynolds W, Baudron V, Kirsch C, Schmidt LM, Singer H, Zenker L, Zetzl C, Smirnova I. Odor-Free Lignin from Lignocellulose by Means of High Pressure Unit Operations: Process Design, Assessment and Validation. CHEM-ING-TECH 2016. [DOI: 10.1002/cite.201600005] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
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Abstract
Although the first reports on aerogels made by Kistler(1) in the 1930s dealt with aerogels from both inorganic oxides (silica and others) and biopolymers (gelatin, agar, cellulose), only recently have biomasses been recognized as an abundant source of chemically diverse macromolecules for functional aerogel materials. Biopolymer aerogels (pectin, alginate, chitosan, cellulose, etc.) exhibit both specific inheritable functions of starting biopolymers and distinctive features of aerogels (80-99% porosity and specific surface up to 800 m(2)/g). This synergy of properties makes biopolymer aerogels promising candidates for a wide gamut of applications such as thermal insulation, tissue engineering and regenerative medicine, drug delivery systems, functional foods, catalysts, adsorbents and sensors. This work demonstrates the use of pressurized carbon dioxide (5 MPa) for the ionic cross linking of amidated pectin into hydrogels. Initially a biopolymer/salt dispersion is prepared in water. Under pressurized CO2 conditions, the pH of the biopolymer solution is lowered to 3 which releases the crosslinking cations from the salt to bind with the biopolymer yielding hydrogels. Solvent exchange to ethanol and further supercritical CO2 drying (10 - 12 MPa) yield aerogels. Obtained aerogels are ultra-porous with low density (as low as 0.02 g/cm(3)), high specific surface area (350 - 500 m(2)/g) and pore volume (3 - 7 cm(3)/g for pore sizes less than 150 nm).
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Amelina E, Krasovsky S, Cherniak A, Kashirskaya N, Kondratieva E, Voronkova A, Gorinova Y, Alimova I, Asherova I, Baykova G, Boytsova E, Dyachkova A, Enina E, Filimonova T, Gaimolenko I, Gembitskaya T, Golubtsova O, Ilyenkova N, Kalinina Y, Kondakova Y, Kozyreva L, Lavrova A, Ledeneva L, Ledneva V, Ljagusha D, Merzlova N, Nikonova V, Pavlov P, Pinegina Y, Protasova T, Revel-Muroz N, Romanenko N, Rybalkina M, Safonova T, Satsuk N, Sergienko D, Seroklinov V, Shabalova L, Shadrina V, Sherman V, Simanova T, Simonova O, Skachkova M, Smirnova I, Stashkevich T, Stepanenko T, Stezhkina E, Usacheva M, Vasilyeva T, Vodovozova E. 259 National cystic fibrosis patients Registry of Russia (RCFPR) in 2014. J Cyst Fibros 2016. [DOI: 10.1016/s1569-1993(16)30497-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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