Spin modulated information storage in biomagnetites István Bókkon Abstract Nowadays different biocrystals get more and more attention and it seems formation of them is universal phenomenon and not exception in living cells. Biocrystals get a possible role not only in the pathological events of cells but also in functional processes. Namely, these can take part in cells’ information and other events. Many experimental facts show features of the nanoscale word and cells are able to connect organic and inorganic operation and information processes. Living cells are quantum „devices” rather than simple electronic devices utilizing only the charge of conduction electrons. However, special biomagnetites have to have a function in the cells and the brain. This paper points out every condition is given existing operational connection between the organic and the inorganic materials in the living cells. Beside it suggests a mechanism – on the basis of the Aharonov-Bohm effect – of biomagnetites as they can take part in the fixation of magnetic information processes in the cells. Key words: features of living cells, inorganic biocrystals, Aharonov-Bohm effect, spinmodulated resistance 1 1. Introduction Usually when we hear about crystals, which develop in living organisms or cells first we think for pathological cases as kidney stone, gallstone etc. Deficient biochemical processes or microorganisms cause different kind of pathological biocrystals formations [1,2]. However, some kinds of biocrystals have functional role in life of the cells. Many scientists treat biomagnetites in a very cursory fashion while others use biological self-assembling techniques to create inorganic magnetites within living bacterial cells, because these biomagnetites have such special features that make them capable to function in computers as information storage components [3]. If bionanomagnetites can work in computers, why don’t we think that they can work in the cells either? It has been well accepted by now different cells of many species contain inorganic biomagnetic crystals. Joseph Kirschvink at California Institute of Technology researched many years in several kinds of living creatures – like bacteria, insects, birds, fishes, etc. – and has found that biomagnetites play an important role in their spaceorientation [4,5]. He also has found Fe3O4 iron-oxide crystals in the human brain composing 50-100 granules. According to his calculations there are five million magnetic crystals in every gram of human brain, with 10-100 manometer of each [6,7]. Considering the mass of the whole human brain, we may assume billion nanocrystals in our brain. According to Kirschvink’s experiments, there are functional connections between biomagnetites and organic molecules. Besides, the assumption that magnetites not only perceive magnetic fields, but also can take part in the inheritance of magnetosome polarity has been raised a long time ago [8,9]. It was the first possibility 2 to ”Heredity without genes”, namely, that the process of information fixation did not take place within the DNA but in biomagnetites, and yet this fixed information could be manifested at the DNA level. 2. Problems in magnetobiology There are paradoxical and basic problems in magnetobiology. How can weak magnetic (for example, Earth’ magnetic fields) or ultra weak electromagnetic stimulus have effects on living cells’ processes? Thermal fluctuations of the kT scale are ten orders greater than the quantum of the AC magnetic fields’ energy [10]. Why do these random disturbances not destroy the magnetobiology effects? At the same time how can living cells resist or compensate the strong effects of natural and artificial magnetic or electromagnetic environment? There are many models of weak magnetic effects on living cells [11]. For examples, with help of biomagnetites, Eddy electric currents, classical and quantum oscillator models, cyclotron resonance, interference of quantum states of bound ions and electrons, coherent quantum excitations, parametric resonance, stochastic resonance, bifurcation, magnetosensitive free-radical etc. Why these models could not solve the basic problem of magnetobiology? I think usually there are not real contradictions among many mentioned models, because living cells use several kinds of different processes simultaneously, but they are so complicated that we cannot find connections among them. Now let see shortly some features of living cells and systems. Living cells use and generate electric, magnetic and electromagnetic (both coherent and incoherent biophoton) waves and also acoustic waves as conformational changes in macromolecules called conformons (analogy to lattice vibration of 3 phonons in solid crystals) [12-17]. Electricity is a basic feature of cells, because all biomolecules are ions or biomolecules are endowed with high electric dipole moment. Besides, when their charges move an electromagnetic field is generated. Magnetic features can emergence from free radicals, organic molecules with metals or biomagnetites [18]. Besides, according to ESR (electron-spin resonance) experiments all living cells or organisms have paramagnetic features in native state [19]. Conformons are originated from continuously moving of molecules. Different parts (DNA, RNA, protein) of the cells show piezoelectric and semiconductor features [20-23]. The piezoelectric effect refers to that property of matter, which can convert electromagnetic oscillations to mechanical vibrations and vice versa or electric oscillations to mechanical vibration and vice versa. Cells’ piezoelectric features can produce circular polarized light pulse, which is the base that living molecules are not raceme mixtures of optically active molecules. Organic semiconductors have crystal-like structure and electrical conductivity as diode. The electric fields of the wave can couple to the mobile carriers within a semiconductor structure and modify its electronic and elastic properties. Optical signals (biophoton) can be stored by the surface acoustic waves (conformon as mechanical vibrations in macromolecules similar to phonon in the solid crystals) in the semiconductor, in a photon-atom-bound way [24], and can be re-assembled into light after very long delay times and at a remote location of the sample. The membrane lipid has about 1011 pores m-2 density, and it is not a uniform non-conductive bulk phase [25]. It is quasi insulators with conductive and nonconductive parts, and besides there are semiconductor proteins in it. It has a non- 4 linear characteristic of current-voltage. Cytoplasm is not simply an aqueous solution of macromolecules, but is a structurally and dynamically organized network (cytoskeleton) of interconnected (semiconductor) protein polymers in the ordered water/ion solution, namely living are liquid crystals [26,27]. Liquid crystals show some of the orientational order of a solid, but the molecules are mobile. The regulated living structures can produce coherent or laser-like oscillations, these vibrations are called Fröhlich oscillations [28]. It seems that the coherence – in the ultrashort time – is a universal phenomenon and not exception in biochemical processes [29]. Many processes work in the ultra short femtosecond time, which let to avoid thermal noises or fluctuations and also can produce coherent biophoton. Living systems show fractal features. Fractal systems, which are the best models of living and non-living world, have special features. Namely, fractals can resist to strong forces at the same time can use very weak ones [30-32]. The phase lateness is a very important feature of fractals, which can be generated by the noise of nonlinear systems. Namely, working of fractals can be direct connection with problem of useful noise [33]. Living cells and organisms can use nonlinear creative white noise for signal amplifying. Claude E. Shannon showed that the most effective code is the noise-like code. We should distinguish between two things, the noise of environment and the noise of vacuum. According to experiments random noise can help the reaction of the neuron system (non-linear resonance) given to a weak signal [34]. Many scientists’ claim that can be an information field from which laws of universe are 5 originated and also work as information storage field. This field is called in many different names in science, but they think for the same thing. For examples, Sheldrake’s morphogenetic field, Igor Sokolov’s virtual particles of structured vacuum, trees “gebits” of Reginald Cahill and Cristopher Klinger, Schrödinger’s negative entropy, extra dimensions of Theodor Kaluza and Oskar Klein etc. [35-38]. The creative noise which work in non-linear systems is originated from this structured geometric information of vacuum field by help of virtual particles as I pointed out previously [39]. I think, the real and fundamental question is in the science existence of extra information fields, which can solve many problems of physic and biology! However living cells can use and originate electric, magnetic, electromagnetic and acoustic waves and convert from one to other. 3. Ion gate model of biomagnetites What are biomagnetites doing in the cells? In the case of bacteria the answer may be simple. Magnetite crystals can take part in navigation processes during they sense Earth's or other magnetic fields called magnetotaxis. But in the case of the birds the answer is not at all simple. How can a migratory bird find the way to home from 3000 kilometers? Besides, what are doing milliard magnetites in the human brain? Kirschvink raised a model that biomagnetites can open or close ion gates in the cells while they perceive the Earths magnetic fields or different electromagnetic fields. This idea was met with many contradictory opinions, doubting that the Earths magnetic fields would be strong enough to generate significant biological effects on biomagnetites. According to photon quantum teleportation Zeilinger: “Yet I am not convinced that living systems are just classical machines” [40]. 6 However, living cells are quantum “devices” rather than simple mechanical and electrical machines. Many experiments show that ultra weak forces work - but fast and accurately - in the cells, as well as information or regulation processes are much faster than molecular processes. If ultra weak processes do not work accurate and very fast (at femtosecond time scale) in the cells, different effects of natural and artificial environment can disintegrate their processes. Of course different natural and artificial radiation can have effects on the cells’ processes but they can compensate it to a wide limit. Living cells can sense and use the Earth’s weak magnetic fields, which is 100 billion stronger than brain’s magnetic processes [41]. At the same time, during MRI examines we are exposed to a very strong 1-14 Tesla magnetic fields, which is much stronger than Earth’ magnetic field. If biomagnetites work as a regulator of ion gates, during MRI examines magnetic radiation can have strong effects on biomagnetites that they can be arranged in one direction and the brain’s processes can be collapsed. So ion gate model is hardly possible. However, there exist additional biophysics possibilities that biomagnetites can take part in information processes in the cells. We must think of it that it is insufficient for a migratory bird to find its way home to simply perceive the Earths magnetic field: the brain of the bird have to record the magnetic map or magnetic vector potential map of the entire way. But how can a migratory bird find the exact way home, to its nest under the certain eaves of a certain house in a certain city from the distance of some thousand kilometers. I think, while magnetites are built up in co-operation mode with help of organic molecules in the cells, these magnetites record the magnetic vector potential information of the entire flight. 7 4. Biomineral productions under biological control (Operation and informational connections between organic molecules and inorganic crystals in the cells) In previously sections we could see living cells originate and also work with electric, magnetic, electromagnetic and acoustic waves and convert one of them to other one. Since, biomagnetites are direct connection with surrounding organic piezoelectric, semiconductor and quasi-insulator molecules, an electric operating connection exist between the biomagnetites and the organic molecules. Electron plays a very important role in the information flow between organic and inorganic materials in the cells. According to experiments - at Lawrence Berkeley National Laboratory - in which examined the behavior of electrons at border-surfaces [42]. A piece of inorganic silver was coated with organic paraffin and it was illuminated with a tunable laser at femtosecond pulse. The electrons came out from silver surface and could bind to lattice of organic paraffin as polarons. The polaron could exist for 1000 femtosecond and came back with tunnel-effect to silver. As the Authors emphasized, this phenomenon is very important in biochemical processes, namely a functional electric connection can exist between organic and inorganic materials. Not only electric operational connection can work between the organic and the inorganic molecules in the cells. Electromagnetic waves mostly effect along cell membranes, which membranes have functional connection with biomagnetites [43]. In in vitro experiments weak electromagnetic fields exert a direct influence on the kinetics of crystal forming [44]. Since, the living cells produce coherent electromagnetic waves (biophoton) [45-47], there also can be electromagnetic operating connection between the organic and the inorganic molecules. So holographic lithography can work within the cells, generating biocrystals by interference of non-coplanar coherent biophotons 8 [48]. Ursula Liebl et al. proved evidence – with femtosecond spectroscopy – for driving of a reaction in a protein complex by coherent motions and suggested the functional importance of vibrational coherence operating on a femtosecond timescale [49]. It seems that the ultrashort time coherence is a universal phenomenon in biochemical processes, as well as processes of femtosecond timescale can produce an operating connection between the organic and the inorganic materials. At nano-levels there are unusual magnetic and electric nonlinear fluctuations, which make modeling rather difficult. At the same time there are phenomena, which create an informational connection possible between the organic and the inorganic molecules. Matter at the nanometer scale has very special properties because of quantum size effects, altered thermodynamics, and modified chemical reactivity. Summarized the mentioned facts, they let organic informational and operational processes linked to inorganic information processes in the living cells. However, biomagnetic crystals are single and structurally well ordered magnetic domains with stabile magnetized and the maximum magnetic moment per unit volume possible for magnetite [50,51]. Biomagnetitec crystal morphology is cubo-octahedral with the {111} direction yields which particle shape uncommon in geological magnetite crystals, so the production of this biomineral must be under precise biological control! Here I suggest this biological control happening by help of coherent biophoton mechanisms in holographic lithography way. The nanometer scale is the dimensional where soft and hard materials sciences meet! 5. Model about the role of biomagnetites on the basis of the Aharonov-Bohm effect Quantum physical Aharonov-Bohm effect is proven by experiments of electron 9 interference [52]. Essence of this effect: if take a piece of static magnet then its static magnetic field is shielded but still exists an effect which can change wave phase of electrons. This effect is more fundamental than magnetic feature, called magnetic vector potential. Here I suggest spin-modulated resistance can work in biomagnetites through the Aharonov-Bohm effect. In this effect, the phase of the electron wave depends on magnetic vector potential, which causes a phase difference and interference between partial waves. Through Aharonov-Bohm effect weak geomagnetic fields can have effects on living cells’ processes. Biomagnetites are so called ferromagnets. Manyala et al. argued that magnetoresistance can rise from different mechanism in certain ferromagnets is quantum interference effect [53]. In addition, Tsukagoshi et al. in their experiments reported that spin-polarized electrons can be injected from a ferromagnet into nonferromagnetic materials (multi-walled carbon nanotubes), finding direct evidence for the coherent transport of electron spins [54]. The above-mentioned mechanisms can work in the cells and in the biomagnetites too. Thus, a model can be generated about the role of biomagnetites as they can take part in information storage and operating processes in the cells through the AharonovBohm effect. When the time of migration comes, magnetic information of surroundings (mainly vector potential) induces a genetic program in the brain cells of migratory birds, which initiates and operates the development of the biomagnetites. Biomagnetites are grown by slow and directed extraction in the cells. During migration, layers of biomagnetites and phases of non-conductive electrons’ wave in the layers take shape by current magnetic vector potential field of surroundings. So, polarized states of non- 10 conductive electrons – which ones are fixed in current layers of biomagnetites – can play the main role in magnetic information storage. During return of bird vector potentials of current magnetic surroundings induce an Aharonov-Bohm type of oscillation in the fixed layer of biomagnetites, so the electric resistance of biomagnetites oscillates. Localized – previously fixed and spin-modulated – non-conductive electrons act as scattering sites for the mobile electrons. Namely, oscillations of dephasing nonconductive (fixed) electrons can have an influence on conductive mobile electrons in biomagnetites. Then there work a coherent transport of mobile electrons’ spins into semiconductor protein molecules (which ones are around biomagnetites). Both effects electric resistance oscillates of biomagnetites and transport of spins can change conformations of semiconductor and other organic molecules at the free rotations. In the end, influences of conformation changes are extended in the cell, and then among the cells, which ones can direct the movement of the bird. In this model, biomagnetites work as devices of spin-modulated resistance. Biomagnetites can perceive the Earth’s magnetostatic or vector potential fields while the layers of them have taken shape, but the magnetostatic interaction between magnetic nanoparticles is negligible in 2D nanoscale limit [55]. So their magnetic state can be manipulated independently of the state of the neighbouring biomagnetites. Consequently, vector potential of the Earth’s magnetic field plays the main role (which cannot be shielded) so we do not need a strong magnetic field to have mechanical effect (closing or opening ion gates) on biomagnetites. Wernsdorfer and Sessoli have observed an Aharonov-Bohm type of oscillation in magnetic molecular clusters, analogous to the oscillations as a function of external flux in a SQUID ring [56]. Their opinion: A great deal of information is contained in 11 these oscillations both about the form of the molecular spin Hamiltonian and about the dephasing effect of the environment. This spin „memory” model of biomagnetites guarantees a great amount of information and an operating system, which is needed for the migratory bird, to find its way home from some thousand kilometers. 6. Signal amplifying process of fixed spin information In reality, many biomagnetites and cells take part in these cooperation processes, but static magnetic forces of biomagnetites and environment do not take role in it but magnetic vector potentials. This model does not need biomagnetites exist in the most cells of the bird’s brain. Fixed vector potential information in biomagnetites is converted to different vibration energy in the cells. Aharonov-Bohm oscillates of electric resistance in biomagnetites and also transport of spins can change conformations organic molecules, which are direct connection with biomagnetites. Then conformation changing can oscillate and these vibrations as conformons - in a polar biological systems - generate electromagnetic biophoton fields around themselves, which can mediate long-range interaction and also signal amplifying processes [57,58]. The living matrix is a structural and energetic continuum. Every cell contains a cytoskeleton that is connected, across the cell surface, with the extracellular connective tissue matrix. Structural components of the system include the connective tissue, cytoskeletal, musculoskeletal, and genetic frameworks. So propagation of conformal changes can expand in this network of the cells. Coupled oscillations, resonant transfer, and electrodynamic coupling allow energy and information to move through the network. So electromechanical, electrochemical, or electrooptic signals can regulate the signal-amplifying processes. 12 7. Without biomagnetites Magnetite is absent in many unicellular organisms, but also can capable of reacting to the different weak magnetic field or low-frequency magnetic field, which can causes a biological response fields. In this case Aharonov-Bohm effect also have a key role in spin modulation way of different organic molecules. But of course without biomagnetites there is not mentioned long-term spin-modulated information storage. 8. Biomagnetites in the human brain The Aharonov-Bohm effect can play a central role in the biomolecular communication. This effect links different electric, magnetic or electromagnetic electrooptic signal processes in the cells. Magnetic informational processes can serve unconscious navigation of the living creatures. It seems that humans also have an innate unconscious sense of direction, namely the direction-sensitive cells [59]. In this case also biomagnetites can play a central role, otherwise why are there billion biomagnetites (among others in hippocampus where direction-sensitive or place cells also take place and vision is not necessary for normal firing of hippocampal place cells) with particular structure in the brain cells [60-62]. However, roles of inorganic materials (crystals) in the cells are not limited on just stabilizing protein structures or taking part in their catalytic processes, as I point out in connection with biopiezoelectric crystals and cells' matrix (which is like a liquid crystal) as they can be holographic information storage in the brain [63,64]. 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