About Book

As an interesting field of research, biophysical chemistry is now growing up rapidly with major breakthroughs everywhere. Biophysical chemistry is an interdisciplinary field of study that uses concepts of chemistry and physics to understand biological systems by describing the quantitative, qualitative, energetics, structure, functions, and interactions phenomena of its physical nature. Because of the complexities of biological systems, a wide range of classical and sophisticated techniques have been employed in the field of biophysical chemistry; therefore mathematical, physical, and chemical techniques all flow into a single stream to describe biological systems. The most important areas that of biophysical chemistry are molecular structure, molecular function, molecular dynamics, and kinetics, interactions, and thermodynamics of macromolecules those are located in the cell membrane or cytoplasmic constituents. This book elucidates new techniques and applications of biophysical chemistry in a multidisciplinary approach. It provides comprehensive insights on nonsynaptic epileptiform activity, dye-sensitized solar cells, pressure measurement, biophysical properties, biophysical effects, attractor hypothesis, biophysical models, imaging applications, biophysical screening and physicochemistry. It presents this complex subject in the most comprehensible and easy to understand language. This book is a complete source of knowledge on the present status of this important field. Readers with a basic understanding of biochemistry and/or biophysics will quickly gain an overview of cutting-edge technology for the biophysical chemistry. Equally, any researcher contemplating a career in the chemical, pharmaceutical or bio-industry will greatly benefit from the technological knowledge presented.

Preface............................................................................................................v

Chapter 1 Physicochemistry and Utilization of Wood Vinegar from Carbonization of Tropical Biomass Waste...........................................1

Abstract...................................................................................................1

1. Introduction............................................................................................2

2. Definition of wood vinegar.................................................................3

3. Factors influencing properties of wood vinegar.............................3

4. Physicochemical properties of wood vinegars................................7

5. Quality of wood vinegars.................................................................11

6. Semi-purification of wood vinegars................................................12

7. Utilization of wood vinegar..............................................................15

8. Conclusion............................................................................................22

Chapter 2 Going Small: Using Biophysical Screening to Implement Fragment Based Drug Discovery.............................................................................27

Abstract.................................................................................................27

1. Introduction..........................................................................................28

2. The rise of fragments as a screening ideology.............................28

3. Fragment primary screening.............................................................29

4. Fragment secondary screening.........................................................43

5. Fragment hit progression..................................................................49

6. Conclusions..........................................................................................51

Acknowledgments...............................................................................52

Chapter 3 Advances in AFM Imaging Applications for Characterizing the Biophysical Properties of Amyloid Fibrils.........................................60

Abstract.................................................................................................60

1. Introduction..........................................................................................61

2. Imaging of self-assembled amyloid fibrils in liquid

environments........................................................................................63

3. PeakForce QNM (quantitative nanomechanical mapping) of

amyloid fibrils......................................................................................69

4. Kelvin probe force microscopy (KPFM) of amyloid fibrils........76

5. Conclusion and perspectives............................................................83

Chapter 4 Implications of Quantum Informational Entropy in Some

Fundamental Physical and Biophysical Models...............................91

1. Introduction..........................................................................................91

2. Informational entropy and energy..................................................93

3. Conclusions........................................................................................118

Chapter 5 Attractor Hypothesis of Associative Cortex: Insights from a

Biophysically Detailed Network Model...........................................125

1. Introduction........................................................................................125

2. Basic hypothesis................................................................................126

3. The network model..........................................................................128

4. Attractor properties, low firing rates and nested oscillations.130

5. Scaling the network and the emergence of bistability and alpha

oscillations..........................................................................................138

6. Multi-item working memory..........................................................141

7. Attentional blink................................................................................144

8. Summary and conclusions..............................................................146

Chapter 6 Biophysical Effects on Chronic Rhinosinusitis Bacterial

Biofilms......................................................................................................155

1. Introduction........................................................................................155

2. Chronic rhinosinusitis......................................................................156

3. Biofilm formation..............................................................................158

4. Methods of disrupting biofilms.....................................................162

5. Summary.............................................................................................165

Chapter 7 Biophysical Properties of Liquid Water exposed to EM Radio

Frequency Radiation..............................................................................177

1. Introduction........................................................................................177

2. Objects and methods ......................................................................178

3. Results and discussion ...................................................................181

4. Conclusion .........................................................................................198

5. Acknowledgment .............................................................................199

Chapter 8 Biophysical phenomena in blood flow system in the process of indirect arterial pressure measurement.............................................204

1. Introduction........................................................................................204

2. Biophysical processes of origin of the arterial pressure waves

interference in occlusive blood flow ............................................205

3. Measurement criteria of systolic and diastolic arterial pressure

based on recording by the oscillogram derivative extreme

point.....................................................................................................214

4. Conclusion .........................................................................................218

5. Acknowledgement ...........................................................................218

Chapter 9 The Chemistry and Physics of Dye-Sensitized Solar Cells.........222

1. Introduction........................................................................................222

2. Mechanism operation.......................................................................223

3. Constituents of DSSCs.....................................................................227

4. Efficiency and prospects..................................................................241

5. Conclusion .........................................................................................242

Chapter 10 Biophysical Aspects of the Nonsynaptic Epileptiform Activity.247

1. Introduction ......................................................................................247

2 . Nonsynaptic epileptiform events...................................................248

3. Nonsynaptic mechanisms ..............................................................254

4. Nonsynaptic connections ...............................................................258

5. Biophysical aspects of the nonsynaptic epileptiform

activities .............................................................................................259

6. Possible targets for controlling refractory seizures ..................278

7. Conclusion .........................................................................................280

8. Acknowledgment .............................................................................280

Citation......................................................................................................287

Index...........................................................................................................289

About Author

Yankun Aiken received his Ph.D. in Biochemistry from Science University, Kaohsiung. He is serving as a Research Associate at Public Research Institute, Jiangsu. His research interest areas are developing new experiments for the physical chemistry laboratory; chemical education and determination of the structures of natural products using spectroscopic methods. Aiken has written several articles and journals on areas of chemistry and physics directly impacting biological phenomena such as biological macromolecules, biologically active molecules, macromolecular assemblies and cell components in terms of kinetics, etc. He has been an active participant at international conferences and forums.