Relevant bibliographies by topics / Diagrammes de solubilité

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Academic literature on the topic 'Diagrammes de solubilité'

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Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Diagrammes de solubilité"

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Yakymchuk, Chris. "Applying Phase Equilibria Modelling to Metamorphic and Geological Processes: Recent Developments and Future Potential." Geoscience Canada 44, no. 1 (2017): 27. http://dx.doi.org/10.12789/geocanj.2017.44.114.

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Phase equilibria modelling has played a key role in enhancing our understanding of metamorphic processes. An important breakthrough in the last three decades has been the ability to construct phase diagrams by integrating internally consistent datasets of the thermodynamic properties of minerals, fluids and melts with activity–composition models for mixed phases that calculate end-member activities from end-member proportions. A major advance in applying phase equilibria modelling to natural rocks is using isochemical phase diagrams to explore the phase assemblages and reaction sequences appli
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Tatu, Alin Laurentiu, Alina Mihaela Elisei, Oana Lificiu, Camelia Diaconu, Magdalena Miulescu, and Olimpia Dumitriu Buzia. "Formulation, Preparation , Physico-Chemical, Microbiological Analysis and Clinical Uses of Capsaicin Microemulsions." Revista de Chimie 70, no. 4 (2019): 1278–82. http://dx.doi.org/10.37358/rc.19.4.7109.

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The present paper aims at creating a pharmaceutical formulation, i.e. microemulsion with capsaicin as the active principle; the purpose was to solubilize capsaicin and draw up pseudoternary phase diagrams establishing the microemulsion domains. We created a pharmaceutical form: capsaicin ointment, aiming at releasing capsaicin in the microemulsion and ointment bases. Comparative microbiological determinations were performed between microemulsion and ointment. The novelty of the study is formulating microemulsions as a means of solving solubility issues and increasing the bioavailability of med
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Nehm, Sarah J., Barbara Rodríguez-Spong, and Naír Rodríguez-Hornedo. "Phase Solubility Diagrams of Cocrystals Are Explained by Solubility Product and Solution Complexation." Crystal Growth & Design 6, no. 2 (2006): 592–600. http://dx.doi.org/10.1021/cg0503346.

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WANG, Yun-shan, Jin-ping ZHANG, and Gang YANG. "Solubility and phase diagrams of hydroxyl manganese chloride." Transactions of Nonferrous Metals Society of China 21, no. 5 (2011): 1136–40. http://dx.doi.org/10.1016/s1003-6326(11)60833-9.

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Babić-Ivančić, V., H. Füredi-Milhofer, W. E. Brown, and T. M. Gregory. "Precipitation diagrams and solubility of uric acid dihydrate." Journal of Crystal Growth 83, no. 4 (1987): 581–87. http://dx.doi.org/10.1016/0022-0248(87)90253-3.

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Dostál, Petr, Josef Filípek, Michal Černý, and Jaroslav Začal. "Dynamic Image of Change of Solubility in Binary Equilibrium System." Acta Universitatis Agriculturae et Silviculturae Mendelianae Brunensis 64, no. 5 (2016): 1473–82. http://dx.doi.org/10.11118/actaun201664051473.

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Change of solubility in solid state complicates relations in constitution diagrams. The authors have made an animation in which all implications are clearly and unambiguously depicted by means of constitution diagrams and instruments for their interpretation, using phase, structural and complex description.
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Christov, Christomir. "Pitzer Model Based Study of CsX-NiX2-H2O (X = Cl, Br) Systems at 298.15 K." Collection of Czechoslovak Chemical Communications 61, no. 4 (1996): 501–6. http://dx.doi.org/10.1135/cccc19960501.

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The Pitzer ion-interaction model was used for simulating the CsX-NiX2-H2O (X = Cl, Br) systems at 298.15 K. The necessary thermodynamic functions (binary and ternary parameters, thermodynamic solubility products) were calculated and the theoretical solubility diagrams plotted. A very good agreement was found between the calculated and observed data.
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Kim, Young Hoon, Yu Chul Kim, Dong-Jin Jang, et al. "Development of 20(S)-Protopanaxadiol-Loaded SNEDDS Preconcentrate Using Comprehensive Phase Diagram for the Enhanced Dissolution and Oral Bioavailability." Pharmaceutics 12, no. 4 (2020): 362. http://dx.doi.org/10.3390/pharmaceutics12040362.

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In this study, we aimed to develop a 20(S)-protopanaxadiol (PPD)-loaded self-nanoemulsifying drug delivery system (SNEDDS) preconcentrate (PSP) using comprehensive ternary phase diagrams for enhanced solubility, physical stability, dissolution, and bioavailability. Capmul MCM C8 and Capryol 90 were selected as the oil phase owing to the high solubility of PPD in these vehicles (>15%, w/w). Novel comprehensive ternary phase diagrams composed of selected oil, surfactant, and PPD were constructed, and the solubility of PPD and particle size of vehicle was indicated on them for the effective de
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Christov, Christomir. "Thermodynamic Study of the CuCl2-MCl2-H2O Systems (M = Mg, Co) at 298.15 K." Collection of Czechoslovak Chemical Communications 61, no. 4 (1996): 507–11. http://dx.doi.org/10.1135/cccc19960507.

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The Pitzer ion-interaction model was used for a simulation of the CuCl2-MCl2-H2O (M = Mg, Co) systems at 298.15 K. The necessary thermodynamic functions (binary and ternary ion-interaction parameters and thermodynamic solubility products) were calculated and the theoretical solubility diagrams plotted. A very good agreement was obtained between the calculated and observed data.
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Kbir-Ariguib, Najia, Dalila Ben Hassan Chehimi, and Lotfi Zayani. "Treatment of Tunisian salt lakes using solubility phase diagrams." Pure and Applied Chemistry 73, no. 5 (2001): 761–70. http://dx.doi.org/10.1351/pac200173050761.

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The Tunisian salt lakes are considered as an important materials resource useful for industry and agriculture. They are called sebkhat or chott, and they cover a large part of Tunisian land. Their brines correspond to the quinary system: Na+, K+, Mg2+ / Cl­, SO42­­H2O. In the first part of this paper, a short description and abstracted geochemical and economical data about some Tunisian salt lakes are given. In the second part, the fitting equations used for modeling the quinary system are established and applied to the subsystems NaCl­KCl­H2O, NaCl­MgCl2­H2O, KCl­MgCl2­H2O, and to NaCl­Na2SO4
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Dissertations / Theses on the topic "Diagrammes de solubilité"

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Ampueda, Ramos Freddy. "Diagrammes de phases hydrocarbures (C12)-fluides supercritiques (N2, CO2, N2 + CO2)." Grenoble 2 : ANRT, 1986. http://catalogue.bnf.fr/ark:/12148/cb37595448c.

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Mahieu, Aurélien. "Nouvelles méthodes de détermination des diagrammes de solubilité polymère / principe actif." Thesis, Lille 1, 2013. http://www.theses.fr/2013LIL10144/document.

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La dispersion moléculaire d’un principe actif (PA) dans un polymère est généralement utilisée pour accroitre à la fois la solubilité et la stabilité physique de sa forme amorphe. Cependant, ce type de formulation demande une parfaite connaissance de la solubilité du PA dans le polymère. Cependant, les méthodes actuelles pour déterminer les courbes de solubilité sont longues et fastidieuses à mettre en oeuvre. Dans cette thèse, nous présentons une méthode originale pour déterminer efficacement la solubilité des PA dans les polymères. L’originalité de cette méthode réside dans le fait que les ét
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Lhéritier, Jean. "Etude thermoanalytique et galénique d'une nouvelle substance médicamenteuse." Montpellier 1, 1995. http://www.theses.fr/1995MON13515.

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Marchand, Pierric. "Development of thermal and calorimetric automatic techniques for determination of phase diagrams with molecular components." Rouen, 2004. http://www.theses.fr/2004ROUES042.

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Ce travail présente la mise au point de l'appareil d'Analyse Thermique Isopéribolique Discontinue (DITA)permettant la détermination des limites d'existences de phases condensées (comprenant au moins une phase liquide) dans le domaine des systèmes de composés moléculaires. Une version calorimétrique de cet appareil a également été mise au point. Une étude du phénomène de solubilité rétrograde dans les systèmes binaires a été réalisée : un critère thermodynamique permettant le diagnostique de la nature de la solubilité (normale ou rétrograde) est proposé ainsi qu'une caractérisation expérimental
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Querniard, Florian. "Thermodynamic study of organic heterogeneous systems : improvement of discontinuous isoperibolic thermal analysis, and use of phase diagrams to design enantiomeric resolutions by crystallization." Rouen, 2010. http://www.theses.fr/2010ROUES026.

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Ce travail de thèse traite de l'étude thermodynamique des systèmes hétérogènes organiques. L'analyse thermique isopéribolique discontinues (DITA), une technique expérimentale permettant l'étude des diagrammes de phases a été améliorée dans trois de ses aspects. Tout d'abord, il a été montré que le signe des ruptures de pente, qui sont caractéristiques du franchissement des limites de domaines, indique le comportement direct ou rétrograde de ces limites. Ensuite, l'incertitude des résultats fournis par la DITA a été estimée grâce à un inventaire des sources d'erreur et à des tests de répétabili
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Latreche, Mansour. "Maîtrise de la stabilité physique des alliages moléculaires amorphes pour optimiser l'efficacité des médicaments." Thesis, Lille 1, 2019. http://www.theses.fr/2019LIL1R039/document.

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La formulation des principes actifs (PA) pharmaceutiques à l'état amorphe est une préoccupation majeure actuelle du génie pharmaceutique car elle permet d'améliorer la solubilité des (PA) peu solubles. Son optimisation requiert une parfaite connaissance de la courbe de solubilité du (PA) dans le polymère, de manière à définir le taux maximum de (PA) pouvant être chargé dans le polymère sans risque de recristallisation ultérieure. La détermination de cette courbe de solubilité est cependant extrêmement difficile en raison de la forte viscosité des polymères qui rend les états saturés très diffi
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Fours, Baptiste. "Contribution à l'étude des phases solides du rimonabant (SR141716)." Rouen, 2009. http://www.theses.fr/2009ROUES048.

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Ce mémoire est une contribution à l’étude des phases cristallines du rimonabant (SR141716). Une première partie traite de la caractérisation et de l’étude des stabilités relatives de deux variétés polymorphiques anhydres (par des mesures de solubilités ainsi que des expériences de conversions menées dans des solvants organiques). Il a également été démontré, par une approche théorique à l’aide des diagrammes de phases, que dans le cadre de systèmes binaires, la présence de solvant pouvait avoir une influence significative sur les équilibres hétérogènes modifiant l’ordre de stabilité des polymo
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Illous, Estelle. "Propriétés amphiphiles d’hydrotropes et de tensioactifs salino-résistants et biosourcés." Thesis, Lille 1, 2017. http://www.theses.fr/2017LIL10132.

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Les tensioactifs et hydrotropes anioniques précipitent en présence de cations mono- et divalents et perdent ainsi leurs propriétés fonctionnelles. Les amphiphiles salino-résistants actuellement proposés par les industriels sont pour la plupart contraires aux 12 principes de la chimie verte et à la loi REACH. Le but de ce travail de recherche a donc été de développer de nouveaux tensioactifs et hydrotropes biosourcés, issus d’une synthèse durable et solubles en milieu salin. Pour ce faire, un classement de la salino-résistance des têtes polaires anioniques, non-ioniques, éthoxylées/anioniques e
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Partaix, Axelle. "Contribution à l'étude de quelques transformations de phases dans des alliages à base TiAl." Rouen, 1996. http://www.theses.fr/1996ROUES060.

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L'objet de ce travail est d'apporter une meilleure connaissance des caractéristiques microstructurales et chimiques des intermétalliques à base TiAl ainsi que des mécanismes qui gouvernent certaines transformations de phases intervenant dans ces alliages. La première partie de l'étude concerne le rôle de l'oxygène, facteur réputé comme déterminant, sur la ductilité à température ambiante des alliages TiAl. Deux résultats importants ont été établis : i) la localisation préférentielle de l'oxygène dans la phase alpha deux et ii) la solubilité maximale de l'oxygène de l'ordre de trois cents ppm a
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Lins, de Azevedo Costa Bhianca. "Generation of high drug loading amorphous solid dispersions by different manufacturing processes." Thesis, Ecole nationale des Mines d'Albi-Carmaux, 2018. http://www.theses.fr/2018EMAC0012/document.

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La principale difficulté lors de l'administration orale d'un ingrédient pharmaceutique actif (API) est de garantir que la dose clinique de l’API sera dissoute dans le volume disponible de liquides gastro-intestinaux. Toutefois, environ 40% des API sur le marché et près de 90% des molécules en cours de développement sont peu solubles dans l’eau et présentent une faible absorption par voie orale, ce qui entraîne une faible biodisponibilité. Les dispersions solides amorphes (ASD) sont considérées comme l’une des stratégies plus efficaces pour résoudre des problèmes de solubilité de
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Books on the topic "Diagrammes de solubilité"

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Franco, E. P. Cardoso. Comportamento do ferro e do alumínio em solução aquosa: Diagramas de equilibrio. Ministério da Educação, Instituto de Investigação Científica Tropical, 1989.

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Book chapters on the topic "Diagrammes de solubilité"

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Usdowski, Eberhard, and Martin Dietzel. "Derivation of Phase Diagrams from Solubility Data." In Atlas and Data of Solid-Solution Equilibria of Marine Evaporites. Springer Berlin Heidelberg, 1998. http://dx.doi.org/10.1007/978-3-642-60284-9_2.

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Pankow, James F. "Solubility Control, Solubility Limitation, the Coexistence of Multiple Solid Phases, and Multiple-Solid Predominance Diagrams." In Aquatic Chemistry Concepts. CRC Press, 2018. http://dx.doi.org/10.1201/9781315137742-14.

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Schweitzer, George K., and Lester L. Pesterfield. "E–pH Diagrams." In The Aqueous Chemistry of the Elements. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195393354.003.0003.

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This volume is intended to employ E–pH diagrams to describe the inorganic solution chemistry of the chemical elements. Such diagrams are very useful in numerous fields of investigation, including electrochemistry, analytical chemistry, inorganic chemistry, geochemistry, environmental chemistry, corrosion chemistry, hydrometallurgy, water chemistry, agricultural chemistry, toxicology, biochemistry, chemical engineering, materials science, health physics, and nutrition. It is assumed that the reader is acquainted with the following major topics which are treated in elementary chemistry: stoichiometry, equilibrium, acid–base phenomena, solubility, complexation, elementary thermodynamics, and electrochemistry. In 1923, W. M. Clark and B. Cohen published a paper in which they introduced the idea of plotting the electromotive force as referred to the hydrogen electrode E against the pH for several chemical systems. In 1928, Clark continued to develop this graphical presentation in his text on the determination of pH. The utility of the method was further extended by numerous other investigators such as M. Pourbaix, G. Valensi, G. Charlot, T. P. Hoar, R. M. Garrels, N. de Zoubov, J. Van Muylder, E. Deltombe, C. Vanleugenhaghe, J. Schmets, M. Maraghini, P. Van Rysselberghe, A. Moussard, J. Brenet, F. Jolas, K. Schwabe, J. Besson, W. Kunz, A. L. Pitman, J. N. Butler, P. Delahay, H. Freiser, H. A. Laitinen, L. G. Sillen, P. L. Cloke, and others. In 1963, M. Pourbaix in collaboration with N. de Zoubov published Atlas d’equilibres electrochimiques, a collection of E–pH diagrams for 90 chemical elements. This volume was translated into English in 1966 by J. A. Franklin and published as Atlas of Electrochemical Equilibria in Aqueous Solutions. Subsequently other investigators published computer programs for constructing the diagrams: L. Santoma; B. G. Williams, and W. H. Patrick; P. B. Linkson, B. D. Phillips, and C. D. Rowles; K. Osseo-Asare, A. W. Asihene, T. Xue, and V. S. T. Ciminellie; D. R. Drewes; M. Mao and E. Peters; H-H. Huang and C. A. Young; J. P. Birk and Laura L. Tayer; G. P. Glasby and H. D. Schulz; and Q. Feng, Y. Ma, and Y. Lu.
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Bunker, Bruce C., and William H. Casey. "Nucleation and Growth of Solid Oxide and Hydroxide Phases." In The Aqueous Chemistry of Oxides. Oxford University Press, 2016. http://dx.doi.org/10.1093/oso/9780199384259.003.0013.

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In this chapter, we consider what happens when solids begin to form from solution. To grow solids from solution, solution conditions are changed from a condition in which all species are completely soluble to a condition in which they are insoluble. In the context of hydrolysis diagrams, the solution composition moves in pH and total dissolved metal concentration from a regime below a solubility or saturation limit (given by the bold solid line in Figs. 5.2 and 5.3) to a regime above this limit where the solution is supersaturated. Supersaturated solutions are inherently unstable and have the potential to generate hydroxide or oxide solids. Sometimes these solutions can be maintained in a metastable state in which precipitation does not occur immediately. However, Mother Nature eventually reduces the energy of the solution by forming a stable mixture of solids plus solution species. As solids form, soluble complexes are removed from solution until concentrations drop back to the solubility limit. The precipitation of a solid from an aqueous solution is a surprisingly complex process, involving nucleation and growth phenomena that occur at nanometer-length scales. Nucleation involves reactions between oligomers to form new clusters or particles that are sufficiently large that they do not redissolve spontaneously via the reversible reactions denoted in hydrolysis diagrams. Homogeneous and heterogeneous nucleation processes represent events that occur within the bulk solution or at the interface of another phase, respectively. Growth involves the addition of monomers to clusters in solution or oligomers to existing particles or surfaces. The combination of nucleation and growth phenomena can lead to oxides exhibiting a bewildering range of sizes, shapes, and crystal structures. How do metal complexes decide whether to form a new particle or add to an existing particle? What determines the size, shape, and crystal structure of evolving particles? Do the particles aggregate with one another in an organized fashion? Because nucleation typically involves extremely rapid (<1 millisecond) events involving objects that are extremely small (on the order of a nanometer), it is difficult to probe such phenomena at a molecular level.
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Ducruix, A., and R. Giegé. "Methods of Crystallization." In Crystallization of Nucleic Acids and Proteins. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780199636792.003.0009.

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There are many methods to crystallize biological macromolecules (for reviews see refs 1-3), all of which aim at bringing the solution of macromolecules to a supersaturation state (see Chapters 10 and 11). Although vapour phase equilibrium and dialysis techniques are the two most favoured by crystallographers and biochemists, batch and interface diffusion methods will also be described. Many chemical and physical parameters influence nucleation and crystal growth of macromolecules (see Chapter 1, Table 1). Nucleation and crystal growth will in addition be affected by the method used. Thus it may be wise to try different methods, keeping in mind that protocols should be adapted (see Chapter 4). As solubility is dependent on temperature (it could increase or decrease depending on the protein), it is strongly recommended to work at constant temperature (unless temperature variation is part of the experiment), using commercially thermoregulated incubators. Refrigerators can be used, but if the door is often open, temperature will vary, impeding reproducibility. Also, vibrations due to the refrigerating compressor can interfere with crystal growth. This drawback can be overcome by dissociating the refrigerator from the compressor. In this chapter, crystallization will be described and correlated with solubility diagrams as described in Chapter 10. Observation is an important step during a crystallization experiment. If you have a large number of samples to examine, then this will be time-consuming, and a zoom lens would be an asset. The use of a binocular generally means the presence of a lamp; use of a cold lamp avoids warming the crystals (which could dissolve them). If crystals are made at 4°C and observation is made at room temperature, observation time should be minimized. Preparation of the solutions of all chemicals used for the crystallization of biological macromolecules should follow some common rules: • when possible, use a hood (such as laminar flux hood) to avoid dust • all chemicals must be of purest chemical grade (ACS grade) • stock solutions are prepared as concentrated as possible with double distilled water. Solubility of most chemicals are given in Merck Index. Filter solutions with 0.22 μm minifilter.
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Schweitzer, George K., and Lester L. Pesterfield. "Precipitation and Complexation." In The Aqueous Chemistry of the Elements. Oxford University Press, 2010. http://dx.doi.org/10.1093/oso/9780195393354.003.0006.

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In Chapter 2, a method for the construction of single-element E–pH diagrams has been presented. No agent which could produce an insoluble compound nor any agent which could complex with any of the simple ions in the single-element diagrams except OH− has been included. However, it is of interest in many cases to derive E–pH diagrams for systems which involve the precipitation or complexation of one or more of the simple ions present in the single-element diagram. One method of deriving such diagrams is to recognize that precipitation or complexation of a simple cation or anion reduces the concentration of the simple ion in solution considerably. If this reduced simple-ion concentration is calculated, it can then be used to construct a new E–pH diagram for the simple ion. Therefore, since the predominant species in the region labeled as the simple ion is no longer the simple cation or anion due to the precipitation or complexation, the region is re-labeled with the precipitated compound or the complex. E–pH diagrams which involve the precipitation or complexation of one or more of the simple ions present in the single-element diagram may also be obtained using one of the available computer programs. For complicated systems, the hand calculations become time consuming and it is often better to employ a computer program. In order to determine the changes in a single element E–pH diagram that occur due to the addition of a precipitating species and the resulting formation of an insoluble compound, the following five steps may be followed. (1) Select an element of interest showing a simple cation or anion and construct the E–pH diagram for the element at a soluble species equilibrium concentration of 10−4.0 M. (2) Select a precipitating agent which will form an insoluble compound with a simple cation or anion of the element of interest. In order to determine which species will form insoluble compounds with the simple ions of an element, it is often useful to consult a list of solubility rules.
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Veesler, S., and R. Boistelle. "Diagnostic of Pre-Nucleation and Nucleation By Spectroscopic Methods and Background on the Physics of Crystal Growth." In Crystallization of Nucleic Acids and Proteins. Oxford University Press, 1999. http://dx.doi.org/10.1093/oso/9780199636792.003.0015.

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Unlike the crystallization of small inorganic molecules, the problem of protein crystallization was first approached by trial and error methods without any theoretical background. A physico-chemical approach was chosen because crystallographers and biochemists needed criteria to rationally select crystallization conditions. In fact, the problem of the production of homogeneous and structurally perfect protein crystals is set the same as the production of high-quality crystals for opto-electronic applications, because, in both cases, the crystal growth mechanisms are the same. Biological macromolecules and small organic molecules follow the same rules concerning crystallization even if each material exhibits specific characteristics. This chapter introduces the fundamentals of crystallization: supersaturation, nucleation, and crystal growth mechanisms. Phase diagrams are presented in Chapter 10. Special attention will be paid to the behaviour of the macromolecules in solution and to the techniques used for their analysis: light scattering (LS), small angle X-ray scattering (SAXS), small angle neutron scattering (SANS), and osmotic pressure (OP). Before obtaining any nucleation or growth, it is necessary to dissolve the biological macromolecules under consideration in some good solvent. However, it may immediately be asked whether a good solvent is a solvent in which the material is highly soluble, or in which nucleation is easily controlled, or in which growth is fast, or solvent in which the crystals exhibit the appropriate morphology. In practice, the choice of the solvent often depends on the nature of the material to be dissolved, taking into account the well known rule which says that ‘like dissolves like’. This means that, for dissolution to occur, it is necessary that the solute and the solvent exchange bonds: between an ion and a dipole, a dipole and another dipole, hydrogen bonds, and/or Van der Waals bonds. Therefore, the nature of the bonds depends on both the nature of the solute and the solvent which can be dipolar protic, dipolar aprotic, or completely apolar. Once the material has dissolved, the solution must be supersaturated in order to observe nucleation or growth. The solution is supersaturated when the solute concentration exceeds its solubility. There are several ways to achieve supersaturation.
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Pankow, James F. "Which Solid Is Solubility Limiting? Examples with Fe(II) for FeCO3(s) vs. Fe(OH)2(s) Using Log p C O 2 vs. pH Predominance Diagrams." In Aquatic Chemistry Concepts. CRC Press, 2019. http://dx.doi.org/10.1201/9780429198861-14.

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Conference papers on the topic "Diagrammes de solubilité"

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Turco Neto, Eugenio, M. A. Rahman, Syed Imtiaz, and Salim Ahmed. "Numerical Flow Analysis of Hydrate Formation in Offshore Pipelines Using Computational Fluid Dynamics (CFD)." In ASME 2016 35th International Conference on Ocean, Offshore and Arctic Engineering. American Society of Mechanical Engineers, 2016. http://dx.doi.org/10.1115/omae2016-54534.

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Hydrate formation is one of the major challenges faced by the Oil and Gas industry in offshore facilities due to its potential to plug wells and reduce production. Several experimental studies have been published so far in order to understand the mechanisms that govern the hydrate formation process under its thermodynamic favorable conditions; however, the results are not very accurate due to the uncertainties related to measurements and metastable behavior observed in some cases involving hydrate formation. Moreover, thermodynamic models have been proposed to overcome the latter constraints b
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"Molecular composition - inhibition activity relationships for humic substances narrow fractions sets obtained by solid-phase extraction." In Sixth International Conference on Humic Innovative Technologies "Humic Substances and Eco-Adaptive Technologies ”(HIT – 2021). Non-Commercial Partnership "Center for Biogenic Resources "Humus Sapiens" (NP CBR "Humus Sapiens"), 2021. http://dx.doi.org/10.36291/hit.2021.mikhnevich.001.

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Humic substances (HS) have a wide spectrum of biological activity including inhibitory activity against β-lactamases.1 The latter are capable of hydrolyzing beta-lactam antibiotics and represent one of the main pathways of bacterial antibiotic resistance. HS are characterized by low toxicity and good solubility in water. A use of HS for therapeutic purposes is hindered by extreme molecular heterogeneity and high level of isomeric complexity. Solid-phase extraction (SPE) fractionation in combination with ultra-high resolution mass spectrometry (FTICR MS) is a promising method to simplify this m
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