| Preface |
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xi | |
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xv | |
| Symbols |
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xix | |
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1 | (2) |
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2 Fundamental Concepts: Isotropic and Anisotropic Colloidal Suspensions |
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3 | (20) |
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2.1 Isotropic Dilute Suspensions |
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5 | (7) |
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2.1.1 Microscopic Colloidal Behavior: Diffusion, Sedimentation and Random Walk Models |
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5 | (2) |
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2.1.2 The Boundary Layer Concept: Electrically Charged Interfaces |
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7 | (3) |
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2.1.3 Effects of Polymers on Colloidal Stability |
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10 | (2) |
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2.2 Anisotropic Dense Suspensions: Colloidal Liquid Crystals |
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12 | (6) |
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2.2.1 The Role of Colloid Shape and Concentration |
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12 | (2) |
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2.2.2 Basic Concepts of Liquid Crystals: Phases and Order Parameter |
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14 | (2) |
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2.2.3 Long- and Short-Range Order: Orientational Distortions and Defects |
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16 | (2) |
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2.3 A Composite System: Nematic Colloids |
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18 | (5) |
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3 Particle-based Active Systems |
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23 | (48) |
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3.1 Self-propelled Swimmers |
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25 | (17) |
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3.1.1 Self-phoretic Swimmers and their Active Brownian Particle (ABP) Models |
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26 | (1) |
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26 | (3) |
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3.1.1.2 Experimental Realizations of Phoretic Swimmers |
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29 | (3) |
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3.1.1.3 Basic Statistical Properties of Self-phoretic Swimmers: Diffusion and Sedimentation |
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32 | (2) |
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3.1.1.4 The Active Brownian Model |
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34 | (4) |
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3.1.2 Swimmers Based on Marangoni Flows |
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38 | (2) |
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3.1.3 Biological Microswimmers |
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40 | (1) |
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3.1.3.1 Flagellated Bacteria |
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40 | (1) |
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3.1.3.2 Other Biological Microswimmers |
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41 | (1) |
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3.2 Colloids Driven to Swim |
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42 | (25) |
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42 | (1) |
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43 | (3) |
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3.2.1.2 A Magnetically Driven Magnetic Snake |
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46 | (1) |
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3.2.1.3 Magnetic Spinners |
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47 | (3) |
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3.2.2 Electric Forcing: Quincke Rollers under DC Driving |
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50 | (3) |
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3.2.3 Electric Forcing: Classical Fixed-Charge Electroosmotic Flows |
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53 | (2) |
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3.2.4 Induced-Charge Electrophoresis under AC Driving |
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55 | (1) |
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3.2.4.1 Induced-Charge Electrophoresis |
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55 | (2) |
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3.2.4.2 Liquid Crystal-Enabled Electrophoresis |
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57 | (4) |
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3.2.4.3 Anomalous Statistical Characteristics of Driven Nematic Colloids |
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61 | (6) |
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3.3 Brief Commented List of Selected Review Papers |
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67 | (4) |
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4 Protein-based Active Fluids |
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71 | (44) |
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4.1 Active Gels Based on Filamentary Proteins |
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72 | (5) |
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4.1.1 Active Gels Based on Actin Filaments |
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72 | (1) |
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4.1.2 Active Gels Based on Microtubules |
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73 | (1) |
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4.1.2.1 Historic Antecedents |
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73 | (1) |
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4.1.2.2 The Brandeis Approach |
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74 | (3) |
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4.2 Two-dimensional Active Nematics |
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77 | (7) |
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4.2.1 Active Nematics Based on Microtubules |
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77 | (6) |
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4.2.2 Active Nematics Based on Actin Filaments |
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83 | (1) |
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4.3 The Effect of the Interface on Two-Dimensional Active Nematics |
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84 | (9) |
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4.3.1 Aqueous Active Nematics Interfaced with Isotropic Oils |
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84 | (3) |
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4.3.2 Aqueous Active Nematics Interfaced with Anisotropic Oils |
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87 | (6) |
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4.4 Effects of Spatial Confinement |
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93 | (16) |
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4.4.1 Encapsulated Active Nematics |
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93 | (6) |
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4.4.2 Geometric Confinement of Active Nematics |
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99 | (4) |
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4.4.3 A New Concept: Active Boundary Layers |
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103 | (3) |
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4.4.4 Geometric Confinement of Active Gels |
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106 | (3) |
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4.5 Recent Advances in the Preparation of Active Gels and Active Nematics |
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109 | (6) |
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5 Emerging Concepts in Active Matter |
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115 | (24) |
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5.1 Dynamic Clustering and Swarming Behavior |
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116 | (6) |
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5.1.1 Experimental Observations of Dynamic Clustering |
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117 | (4) |
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5.1.2 Modeling Approaches to Clustering of Microswimmers |
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121 | (1) |
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5.2 Motility-Induced Phase Separation |
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122 | (6) |
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128 | (4) |
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5.4 Thermodynamic Concepts in Active Matter |
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132 | (7) |
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132 | (1) |
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133 | (6) |
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139 | (48) |
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6.1 Linearized Leslie-Ericksen Theories for Active Polar Fluids |
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140 | (15) |
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6.1.1 General Scheme of Equations |
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141 | (5) |
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6.1.2 Analysis of +1 Defects: Asters, Vortices, and Spirals |
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146 | (2) |
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6.1.3 Activity-Induced Flows from Aligned States |
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148 | (3) |
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6.1.4 Minimal Version for a Two-Dimensional Active Nematic in Absence of Flow-Alignment |
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151 | (4) |
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6.2 A Beris-Edwards Approach to Model Active Nematics |
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155 | (8) |
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6.2.1 General Scheme of Equations |
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155 | (2) |
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6.2.2 A Simplified Analysis of Defect Dynamics |
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157 | (3) |
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6.2.3 Theoretical Description of Active Nematic Turbulence |
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160 | (3) |
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6.3 Modeling Interfaced Active Fluids |
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163 | (8) |
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6.4 Modeling Confined Active Fluids |
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171 | (12) |
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6.4.1 Modeling Active Flows in Thin Films and Droplets |
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171 | (1) |
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6.4.1.1 Thin Active Films |
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171 | (3) |
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174 | (5) |
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6.4.2 Modeling Active Flows under Geometric Confinement |
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179 | (4) |
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6.5 Brief Commented List of Selected Review Papers |
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183 | (4) |
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7 Concepts and Models for Dry Active Matter |
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187 | (20) |
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7.1 Hydrodynamic-like Theories |
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189 | (10) |
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7.1.1 Flocking of Active Polar Particles |
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189 | (3) |
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7.1.1.1 Giant Number Fluctuations |
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192 | (2) |
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7.1.2 Particles Interacting Nematically on a Substrate |
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194 | (3) |
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7.1.3 Self-Propelled Rods with Nematic Alignment |
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197 | (2) |
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7.2 Microscopic-like Theories |
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199 | (8) |
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7.2.1 Particle-Based Models for Dry Systems |
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199 | (3) |
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7.2.2 Common Rationale: Phase-Separated Regimes |
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202 | (1) |
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7.2.3 Specific Class-Dependent Features |
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203 | (1) |
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7.2.3.1 Traveling Bands in Polar Class |
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203 | (1) |
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7.2.3.2 Unstable Nematic Bands |
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204 | (1) |
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7.2.4 Properties of the Liquid Ordered Phase |
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205 | (2) |
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8 Appendix 1: Microswimming in Constrained and Disordered Environments |
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207 | (10) |
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8.1 Microswimming under Constrained Motion |
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207 | (4) |
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8.2 Microswimming under the Effects of Noise and Disorder |
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211 | (6) |
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9 Appendix 2: Microswimming in Complex Fluids |
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217 | (8) |
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9.1 Motion of Microorganisms in Complex Fluids |
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217 | (2) |
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9.2 Artificial Microswimmers Performing in Complex Fluids |
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219 | (3) |
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9.3 Theoretical Approaches to Microswimming in Complex Fluids |
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222 | (3) |
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10 Appendix 3: Motility Assays |
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225 | (6) |
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10.1 Motility Assays Based on the Actin System |
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225 | (3) |
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10.2 Motility Assays Based on the Tubulin System |
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228 | (3) |
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11 Appendix 4: Active Nematic Concepts in the Context of Cell Tissues |
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231 | (10) |
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11.1 Textures, Flows, and Defects in Cell Tissues |
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231 | (10) |
| Bibliography |
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241 | (38) |
| Index |
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279 | |