Содержание
- 2. Colloidal Chemistry A colloid is a substance microscopically dispersed evenly throughout another substance. The designation ‘‘colloid’’
- 4. Colloidal Science an interdisciplinary intersection dealing with colloids, heterogeneous systems consisting of a mechanical mixture of
- 6. Surface tension
- 7. Dispersed liquids in nature
- 9. Minimal surfaces Costa’s minimal surface (1982) Catenoid Helicoid
- 10. There is an extra energy associated with a surface Molecules on the surface are less bounded
- 11. Surface phenomena The increased surface area of the phase separation is associated with the transition of
- 12. Surface tension σ is the work required for the creation of 1 m2 of surface [σ]=
- 13. Surface tension Surface tension depends on: the nature of fluid σ(Н2О)=72,8 J/m2; σ(serum)=45,4 J/m2). temperature (↑t
- 14. The surface tension can be thought of as a force F A The energy per unit
- 15. A didactic setup (Cf. Wilhelmy plate)
- 16. WETTABILITY Why does one fabric absorb water well while another seems to refuse it? Why does
- 17. WETTABILITY
- 18. Cohesion (n. lat. cohaerere "stick or stay together") or cohesive attraction or cohesive force is the
- 19. CAPILLARITY
- 20. Capillary forces What is the force between two spheres?
- 21. SORPTION
- 22. Medical & biological importance: Assimilation of nutrients and drugs Transfer of O2 and CO2 from the
- 23. Sorption -change in the concentration of one or more components in heterogeneous systems Sorption - the
- 24. Adsorption Adsorption is spontaneous change of component concentration in the surface layer compared to the volume
- 25. Gibbs Equation G - the amount of adsorbed substance [mole/m2] а – equilibrium activity of the
- 26. Surface activity The ability of the solute to change surface tension is called surface activity (γ)
- 27. Traube-Duclos rule: When extending the chain-CH2 - in homological series of surface activity increases in 3-3,5
- 28. SAS, SIS, SNS Surface-active substances (SAS): reduce σ solvent. σ solution O. SAS: alcohols, organic acids,
- 29. The isotherm of surface tension The dependence of σ on the concentration the dissolved substance at
- 31. Surfactants Surfactant classification according to the composition of their head: nonionic, anionic, cationic, amphoteric.
- 35. Surfactants in nature Pulmonary surfactants
- 36. Effect of surfactants on surface tension Critical micellar concentration
- 37. What is the pressure in a soap bubble ? « Amusons nous sur la terre comme
- 38. What can you tell about the pressure in a liquid from the shape of a rising
- 39. ADSORPTION ON THE LIQUID-GAS BORDER
- 40. Calculation of the adsorption isotherm G= ƒ(с) For the calculation of the adsorption isotherm you are
- 41. Gibbs’ isotherm of adsorption 1. Low С 1 2 G c gas water 2. High С
- 42. ADSORPTION ON THE SOLID-GAS BORDER
- 43. Adsorption by solids The adsorption value depends on: 1. The size of the adsorbent surface if
- 44. Freundlich equation А = x/m = k · p1/n G = x/m = КF · Cn
- 45. Determination of the constants in the Freundlich equation lg A = lg k + 1/n lg
- 46. The theory of Langmuir 1) On each absorption place on the surface of the adsorbent can
- 47. The theory of Langmuir According to this theory localization adsorption can be represented of the quasichemical
- 48. Langmuir equation А = А КС for gases : G = G _Кр_ 1+(КС) 1+Кр С
- 49. To find the constants A ∞ and K linear formula of Langmuir equation is used. Substituting
- 50. Langmuir’s isotherm of adsorption с G
- 51. Theory of polymolecular adsorption BET (Brunauer, Emmett, Teller) Many experimental evidence suggests that, after the monomolecular
- 52. ADSORPTION ON THE BORDER OF SOLID – SOLUTION In the study of adsorption from solutions on
- 53. Molecular adsorption Experimentally determined value of the adsorption of knowing the initial concentration of the solution
- 54. Molecular adsorption So, in the adsorption of aliphatic carboxylic acids from aqueous solutions on a non-polar
- 55. Conclusion From the above that is confirmed, that: For adsorption SAS from the nonpolar or low-polar
- 56. The ion exchange adsorption The ion exchange adsorption - a process in which the adsorbent is
- 57. Chromatography Chromatography is dynamic method of analysis based on multiply repeated processes of sorption and desorption.
- 58. Chromatography is physical chemical method used to separate substances analytical objectives formulations objectives Used for identification
- 59. From the history of chromatography Mikhail Semenovich Tsvet (1872—1919) Birthday of chromatography – 21.03.1903 The report
- 60. «No other discovery had such a huge long lasting effect in organic chemistry as the analysis
- 61. The principle of chromatographic separation of substances The stationary phase The mobile phase Molecules of substances
- 62. Column chromatography the stationary phase is in the column; the technique used in gas and liquid
- 63. Identification by GLC For Identification of compounds in the mixture, its retention time compared with a
- 64. HPLC Agilent Technologies
- 65. HPLC Milichrom
- 66. HPLC HP
- 67. GLC “Agilent Technologies”
- 68. Enterosorption It is method of treatment of various diseases, based on the ability of enterosorbents bind
- 69. Enterosorbents Polyphepan (lignin) Activated carbon (sorbex, carbolong, carbolen)
- 70. Enterosorbents Smecta Silicon organic sorbent Enterosgel
- 71. Enterosorption Enterosorption is part of efferent therapy (from the Latin word efferens means output). Also enterosorption,
- 72. Hemodialysis Hemodialysis (from hemo-and διάλυσις - decomposition, office) is extrarenal method of blood purification during acute
- 73. Peritoneal dialysis Peritoneal dialysis (dialysis Greek expansion, separation) is method of cleansing the blood of endogenous
- 74. Plasmapheresis Membrane plasma filter contains a chamber for the flow of blood separated from the cameras
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