Physics of Biology

1911 Submissions

[43] viXra:1911.0520 [pdf] submitted on 2019-11-30 13:08:24

Microneedle Reversible Contraception

Authors: George Rajna
Comments: 42 Pages.

In an effort to increase access to long-acting contraception, a US-based research team has developed a microneedle patch that slowly releases contraceptive hormone for more than a month, and generates no biohazardous sharps waste (Science Advances 10.1126/sciadv.aaw8145). [26] Researchers at the UPV/EHU-University of the Basque Country have developed a biomedical device for cell immune-isolation (microcapsules) with luminescence for in vivo tracking. [25] Using x-rays to reveal the atomic-scale 3-D structures of proteins has led to countless advances in understanding how these molecules work in bacteria, viruses, plants, and humans—and has guided the development of precision drugs to combat diseases such as cancer and AIDS. [24]
Category: Physics of Biology

[42] viXra:1911.0500 [pdf] submitted on 2019-11-29 01:49:06

Physical Principles in Revealing the Working Mechanisms of Brain, Part One

Authors: Nicolae Mazilu
Comments: 50 Pages.

This work is addressed to a wide range of scientists who approach the research of the human brain from different points of view. Our main point is that no matter of the angle of approach in the brain research, a scientist has to be aware of the physical possibility of working of the brain. We describe this possibility by modeling the brain as light. The essential physical property of this model is fractality. It will be physically explained for the light itself and then applied as such to the brain. The main brain functions: the memory, acquiring information, and handling this information are then explained as scale transient fractal phenomena. This physical model is thereby useful in guiding any research on brain, no matter of its nature.
Category: Physics of Biology

[41] viXra:1911.0496 [pdf] submitted on 2019-11-29 05:14:51

Photon in Organic Solar Cells

Authors: George Rajna
Comments: 56 Pages.

Organic solar cells are steadily improving as new materials are developed for the active layer, particularly when materials are stacked in a bulk heterojunction design that takes advantage of multiple combined absorption windows to use photons at more parts of the spectrum. [37] The experiments showed that quantum light can be used to probe enzyme activities in real time without perturbing the sample. [36] The biological technique of 'optogenetics' uses light to control cells within living tissues that have been genetically modified to be light-sensitive. [35]
Category: Physics of Biology

[40] viXra:1911.0486 [pdf] submitted on 2019-11-29 07:47:36

Cutting Nanoparticles to Size

Authors: George Rajna
Comments: 47 Pages.

In a new study, published in Nature Communications, researchers from the University of Birmingham and the University of Bath have demonstrated a technique that will allow chemists to more closely control the size and shape of nanoparticles. [33] Rice University scientists have found revealing information where light from a molecule meets light from a nanoparticle. [32] A University of Wyoming researcher and his team have shown, for the first time, the ability to globally align single-wall carbon nanotubes along a common axis. [31] The fight against global antibiotic resistance has taken a major step forward with scientists discovering a concept for fabricating nanomeshes as an effective drug delivery system for antibiotics. [30] The solution consisting of colloidal quantum dots is inkjet-printed, creating active photosensitive layer of the photodetector. [29] I'm part of a group of nanotechnology and neuroscience researchers at the University of Washington investigating how quantum dots behave in the brain. [28] Nanotechnology may provide an effective treatment for Parkinson's disease, a team of researchers suggests. [27] Recent research from Kumamoto University in Japan has revealed that polyoxometalates (POMs), typically used for catalysis, electrochemistry, and photochemistry, may also be used in a technique for analyzing quantum dot (QD) photoluminescence (PL) emission mechanisms. [26] Researchers have designed a new type of laser called a quantum dot ring laser that emits red, orange, and green light. [25] The world of nanosensors may be physically small, but the demand is large and growing, with little sign of slowing. [24] In a joint research project, scientists from the Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy (MBI), the Technische Universität Berlin (TU) and the University of Rostock have managed for the first time to image free nanoparticles in a laboratory experiment using a highintensity laser source. [23] For the first time, researchers have built a nanolaser that uses only a single molecular layer, placed on a thin silicon beam, which operates at room temperature. [22]
Category: Physics of Biology

[39] viXra:1911.0485 [pdf] submitted on 2019-11-29 09:43:25

Clarkson’s Disease: a Rare Syndrome to Better Understand Science

Authors: Diego Liberati
Comments: 16 Pages.

a priming on such rare disease
Category: Physics of Biology

[38] viXra:1911.0483 [pdf] submitted on 2019-11-29 09:47:49

SCLS Una Sindrome Rara Per L’approfondimento Scientifico (In Italian, Internal Report Ieiit CNR)

Authors: Diego Liberati
Comments: 7 Pages.

a priming in Italian
Category: Physics of Biology

[37] viXra:1911.0455 [pdf] submitted on 2019-11-27 08:17:17

Implantable Magnet Resonance Detector

Authors: George Rajna
Comments: 61 Pages.

A team of neuroscientists and electrical engineers from Germany and Switzerland developed a highly sensitive implant that enables to probe brain physiology with unparalleled spatial and temporal resolution. [37] A study published in Nature describes a new design for optical resonators that are more effective at trapping light, an important fundamental step towards making more efficient optical devices. [36] Researchers have, for the first time, integrated two technologies widely used in applications such as optical communications, bio-imaging and Light Detection and Ranging (LIDAR) systems that scan the surroundings of self-driving cars and trucks. [35]
Category: Physics of Biology

[36] viXra:1911.0445 [pdf] submitted on 2019-11-26 04:36:25

Topographical Gel Nanosensors

Authors: George Rajna
Comments: 49 Pages.

In a new study, Karthik Pushpavanam and an interdisciplinary team of researchers in the departments of Chemical Engineering, Molecular Sciences, Banner MD Anderson Cancer Center and Arizona Veterinary Oncology in the U.S. has described a novel gel-based nanosensor. The technology allows colorimetric detection and quantification of topographical radiation dose profiles during radiotherapy. [28] Nanometers are one billionth of a meter, a metric typically used to measure molecules and scientific building blocks not visible to the human eye. [27] A new chip-based platform developed by researchers at UC Santa Cruz integrates nanopores and optofluidic technology with a feedback-control circuit to enable an unprecedented level of control over individual molecules and particles on a chip for high-throughput analysis. [26] The ability to observe how life works at a nanoscale level is a grand challenge of our time. [25] Scientists at the Max Planck Institute for Plant Breeding Research in Cologne have now discovered how a protein called LMI1 can control leaf growth and shape. [24] One way we might actually prove our biological complexity is to look at the number of different proteins that our bodies can produce for building all our different types of cells and the other things they need. [23] A new method allows researchers to systematically identify specialized proteins that unpack DNA inside the nucleus of a cell, making the usually dense DNA more accessible for gene expression and other functions. [22]
Category: Physics of Biology

[35] viXra:1911.0444 [pdf] submitted on 2019-11-26 05:13:18

Magnets Mimic Binding in DNA

Authors: George Rajna
Comments: 35 Pages.

A team led by Cornell University physics professors Itai Cohen and Paul McEuen is using the binding power of magnets to design self-assembling systems that potentially can be created in nanoscale form. [22] Histones are proteins that regulate the unwinding of DNA in the cell nucleus and the expression of genes based on chemical modifications or "marks" that are placed on their tails. [21] Now, in a new paper published in Nature Structural & Molecular Biology, Mayo researchers have determined how one DNA repair protein gets to the site of DNA damage. [20]
Category: Physics of Biology

[34] viXra:1911.0443 [pdf] submitted on 2019-11-26 05:27:40

DNA Star Ultra-Sensitive Test

Authors: George Rajna
Comments: 37 Pages.

By folding snippets of DNA into the shape of a five-pointed star using structural DNA nanotechnology, researchers have created a trap that captures Dengue virus as it floats in the bloodstream. [23] A team led by Cornell University physics professors Itai Cohen and Paul McEuen is using the binding power of magnets to design self-assembling systems that potentially can be created in nanoscale form. [22] Histones are proteins that regulate the unwinding of DNA in the cell nucleus and the expression of genes based on chemical modifications or "marks" that are placed on their tails. [21]
Category: Physics of Biology

[33] viXra:1911.0438 [pdf] submitted on 2019-11-25 08:05:37

Enzyme Toolkit for Biotechnology

Authors: George Rajna
Comments: 47 Pages.

The Open Enzymes collection is one step toward allowing synthetic biologists from anywhere in the world to join the conversation. [28] The discovery that protein therapeutics can hijack the HOPS complex to gain access to the cell interior should help scientists design therapeutic proteins to treat diseases that are not adequately treated using other approaches, Schepartz said. [27] DNA regions susceptible to breakage and loss are genetic hot spots for important evolutionary changes, according to a Stanford study. [26] For the English scientists involved, perhaps the most important fact is that their DNA read was about twice as long as the previous record, held by their Australian rivals. [25] Researchers from the University of Chicago have developed a high-throughput RNA sequencing strategy to study the activity of the gut microbiome. [24] Today a large international consortium of researchers published a complex but important HYPERLINK "https://www.nature.com/articles/s41586-018-0734-6" study looking at how DNA works in animals. [23] Asymmetry plays a major role in biology at every scale: think of DNA spirals, the fact that the human heart is positioned on the left, our preference to use our left or right hand ... [22] Scientists reveal how a 'molecular machine' in bacterial cells prevents fatal DNA twisting, which could be crucial in the development of new antibiotic treatments. [21] In new research, Hao Yan of Arizona State University and his colleagues describe an innovative DNA HYPERLINK "https://phys.org/tags/walker/" walker, capable of rapidly traversing a prepared track. [20] Just like any long polymer chain, DNA tends to form knots. Using technology that allows them to stretch DNA molecules and image the behavior of these knots, MIT researchers have discovered, for the first time, the factors that determine whether a knot moves along the strand or "jams" in place. [19]
Category: Physics of Biology

[32] viXra:1911.0397 [pdf] submitted on 2019-11-23 04:14:37

MRI-Compatible Electrodes

Authors: George Rajna
Comments: 100 Pages.

Deep brain stimulation (DBS)-in which electrodes implanted in the brain send electrical signals to areas that control movement-is increasingly employed to treat symptoms of movement disorders such as Parkinson's disease, essential tremor or dystonia. [59] Researchers at the Center for Quantum Nanoscience (QNS) within the Institute for Basic Science (IBS) at Ewha Womans University have made a major scientific breakthrough by performing the world's smallest magnetic resonance imaging (MRI). [58] Researchers at the University of Southampton and the Korea Institute for Advanced Study have recently showed that supersymmetry is anomalous in N=1 superconformal quantum field theories (SCFTs) with an anomalous R symmetry. [57] Researchers at ETH Zurich have developed a method that allows them to characterize the fluctuations in detail. [56] A team of researchers from Nanyang Technological University, Singapore (NTU Singapore) and Griffith University in Australia have constructed a prototype quantum device that can generate all possible futures in a simultaneous quantum superposition. [55] Physicists have proposed an entirely new way to test the quantum superposition principle-the idea that a quantum object can exist in multiple states at the same time. [54] Researchers have developed a new device that can measure and control a nanoparticle trapped in a laser beam with unprecedented sensitivity. [53] Researchers have discovered a 'blind spot' in atomic force microscopy-a powerful tool capable of measuring the force between two atoms, imaging the structure of individual cells and the motion of biomolecules. [52] Australian scientists have investigated new directions to scale up qubits-utilising the spin-orbit coupling of atom qubits-adding a new suite of tools to the armory. [51] A team of international researchers led by engineers from the National University of Singapore (NUS) have invented a new magnetic device to manipulate digital information 20 times more efficiently and with 10 times more stability than commercial spintronic digital memories. [50]
Category: Physics of Biology

[31] viXra:1911.0393 [pdf] submitted on 2019-11-23 05:10:57

Tiny Antennas for Wearable Electronics

Authors: George Rajna
Comments: 27 Pages.

Now, researchers in ACS Nano have made the tiniest radio-frequency antennas reported yet, with thicknesses of about 1/100 of a human hair. [16] Lin said the antenna he is developing could eventually be used in a chip implanted in a patient's brain to help treat disorders such as depression or severe migraines. [15] But for fast things like biomagnetic fields produced by firing neurons, we need to do better than that, or we might miss out on some information." [14] U.S. Army-funded researchers at Brandeis University have discovered a process for engineering next-generation soft materials with embedded chemical networks that mimic the behavior of neural tissue. [13] Researchers have fused living and non-living cells for the first time in a way that allows them to work together, paving the way for new applications. [12] UZH researchers have discovered a previously unknown way in which proteins interact with one another and cells organize themselves. [11] Dr Martin Sweatman from the University of Edinburgh's School of Engineering has discovered a simple physical principle that might explain how life started on Earth. [10] Nearly 75 years ago, Nobel Prize-winning physicist Erwin Schrödinger wondered if the mysterious world of quantum mechanics played a role in biology. A recent finding by Northwestern University's Prem Kumar adds further evidence that the answer might be yes. [9] A UNSW Australia-led team of researchers has discovered how algae that survive in very low levels of light are able to switch on and off a weird quantum phenomenon that occurs during photosynthesis. [8] This paper contains the review of quantum entanglement investigations in living systems, and in the quantum mechanically modeled photoactive prebiotic kernel systems. [7] The human body is a constant flux of thousands of chemical/biological interactions and processes connecting molecules, cells, organs, and fluids, throughout the brain, body, and nervous system. Up until recently it was thought that all these interactions operated in a linear sequence, passing on information much like a runner passing the baton to the next runner. However, the latest findings in quantum biology and biophysics have discovered that there is in fact a tremendous degree of coherence within all living systems. The accelerating electrons explain not only the Maxwell Equations and the Special Relativity, but the Heisenberg Uncertainty Relation, the Wave-Particle Duality and the electron's spin also, building the Bridge between the Classical and Quantum Theories. The Planck Distribution Law of the electromagnetic oscillators explains the electron/proton mass rate and the Weak and Strong Interactions by the diffraction patterns. The Weak Interaction changes the diffraction patterns by moving the electric charge from one side to the other side of the diffraction pattern, which violates the CP and Time reversal symmetry. The diffraction patterns and the locality of the self-maintaining electromagnetic potential explains also the Quantum Entanglement, giving it as a natural part of the Relativistic Quantum Theory and making possible to understand the Quantum Biology.
Category: Physics of Biology

[30] viXra:1911.0392 [pdf] submitted on 2019-11-23 05:44:57

Self-Propelled Protocells Control

Authors: George Rajna
Comments: 64 Pages.

Synthetic protocells can be made to move toward and away from chemical signals, an important step for the development of new drug-delivery systems that could target specific locations in the body. [41] MIT engineers have shown that they can enhance the performance of drug-delivery nanoparticles by controlling a trait of chemical structures known as chirality-the "handedness" of the structure. [40] The process, developed by Nagoya University researchers in Japan, could be upscaled for manufacturing purified batches of single-wall carbon nanotubes that can be used in high-performance electronic devices. [39] Scientists at Texas Heart Institute (THI) and Rice University have used biocompatible fibres made of carbon nanotubes (CNTs) as electrical bridges to restore conductivity to damaged hearts. [38] A team of researchers from China, the U.S. and Japan has developed a way to strengthen graphene-based membranes intended for use in desalination projects-by fortifying them with nanotubes. [37] The team arrived at their results by imaging gold nanoparticles, with diameters ranging from 2 to 5 nanometres, via aberration corrected scanning transmission electron microscope. [36] Nanoparticles of less than 100 nanometres in size are used to engineer new materials and nanotechnologies across a variety of sectors. [35] For years, researchers have been trying to find ways to grow an optimal nanowire, using crystals with perfectly aligned layers all along the wire. [34] Ferroelectric materials have a spontaneous dipole moment which can point up or down. [33] Researchers have successfully demonstrated that hypothetical particles that were proposed by Franz Preisach in 1935 actually exist. [32]
Category: Physics of Biology

[29] viXra:1911.0372 [pdf] submitted on 2019-11-21 10:26:22

3-D Imaging for Biomedical Researches

Authors: George Rajna
Comments: 64 Pages.

By combining a compressive sensing algorithm with a digital holographic microscope, Prof. Shih-Chi Chen of the Department of Mechanical and Automation Engineering, Faculty of Engineering, The Chinese University of Hong Kong (CUHK) and his research team have developed a high-speed imaging method. [40] Researchers have developed a combination of commercially available hardware and open-source software, named PySight, which improves rapid 2-D and 3-D imaging of the brain and other tissues. [39] A University of Nottingham academic has won a prestigious five-year fellowship to explore the use of harmless sound waves to view deep inside living cells to aid early diagnose in diseases such as cancer. [38]
Category: Physics of Biology

[28] viXra:1911.0332 [pdf] submitted on 2019-11-19 01:16:27

Quantum Light Biological Measurement

Authors: George Rajna
Comments: 55 Pages.

The experiments showed that quantum light can be used to probe enzyme activities in real time without perturbing the sample. [36] The biological technique of 'optogenetics' uses light to control cells within living tissues that have been genetically modified to be light-sensitive. [35] Not much is known about the course of events leading to Alzheimer’s disease, but the formation of toxic β-amyloid plaques and phosphorylated tau proteins have long been described as major hallmarks of the disease. [34]
Category: Physics of Biology

[27] viXra:1911.0331 [pdf] submitted on 2019-11-19 02:05:28

Speed of Life Protein Imaging

Authors: George Rajna
Comments: 58 Pages.

To study the swiftness of biology—the protein chemistry behind every life function—scientists need to see molecules changing and interacting in unimaginably rapid time increments—trillionths of a second or shorter. [37] The experiments showed that quantum light can be used to probe enzyme activities in real time without perturbing the sample. [36] The biological technique of 'optogenetics' uses light to control cells within living tissues that have been genetically modified to be light-sensitive. [35]
Category: Physics of Biology

[26] viXra:1911.0309 [pdf] submitted on 2019-11-18 07:00:38

Cancer-Shielding Protein

Authors: George Rajna
Comments: 67 Pages.

What we learned in this study is extremely useful in designing new drugs because it tells us which areas to target to block the checkpoint protein's function." [36] Now, in a watershed advance, engineers at the University of California, Riverside, in collaboration with researchers at City of Hope National Medical Center, have invented a device that holds potential for mass-producing engineered cells at lower cost, a tipping point for these lifesaving therapies. [35] Scientists have reported a new approach to treating lung cancer with inhaled nanoparticles developed at Wake Forest School of Medicine, part of Wake Forest Baptist Health. [34]
Category: Physics of Biology

[25] viXra:1911.0293 [pdf] submitted on 2019-11-17 04:22:45

Nanoparticles Fight Lung Cancer

Authors: George Rajna
Comments: 64 Pages.

Scientists have reported a new approach to treating lung cancer with inhaled nanoparticles developed at Wake Forest School of Medicine, part of Wake Forest Baptist Health. [34] Another collaborative project from a nanoparticles expert at The University of Texas at Arlington has yielded promising results in the search for more effective, targeted cancer treatments. [33] Automated radiotherapy planning is a boon for medical physicists and dosimetrists, radiotherapy departments, and patients themselves – according to a team at Cone Health Cancer Center. [32]
Category: Physics of Biology

[24] viXra:1911.0288 [pdf] submitted on 2019-11-17 06:38:45

Precisely Poking Cells Cure Cancer

Authors: George Rajna
Comments: 65 Pages.

Now, in a watershed advance, engineers at the University of California, Riverside, in collaboration with researchers at City of Hope National Medical Center, have invented a device that holds potential for mass-producing engineered cells at lower cost, a tipping point for these lifesaving therapies. [35] Scientists have reported a new approach to treating lung cancer with inhaled nanoparticles developed at Wake Forest School of Medicine, part of Wake Forest Baptist Health. [34]
Category: Physics of Biology

[23] viXra:1911.0285 [pdf] submitted on 2019-11-16 10:17:04

Better Candidate for Chemotherapy

Authors: George Rajna
Comments: 41 Pages.

When the red blood cells make their tight squeeze through the lung's tiny capillaries, the nanoparticles are sheared off and taken up by lung cells with tenfold greater success than free-floating nanoparticles, and dramatically improved the survival of mice with lung cancer metastasis. [25] But a new ultrasonic method proposed by biomedical engineers from Qifa Zhou's team at the University of Southern California in Los Angeles could enable acoustic control and real-time tracking of drug release within the body. [24] A Rutgers-led team has created better biosensor technology that may help lead to safe stem cell therapies for treating Alzheimer's and Parkinson's diseases and other neurological disorders. [23]
Category: Physics of Biology

[22] viXra:1911.0276 [pdf] submitted on 2019-11-15 23:47:03

Energy, Market, Ecology and the Challenge of Civilization

Authors: V. A. Kasimov.
Comments: 7 Pages. Russian, English

Perhaps the most sinister the shadow hanging over the future of Humanity is the uncontrolled use of enormous amounts of energy. The "marriage union" of the market with energy is able to create an ecological monster that will "devour” all life on Earth except, perhaps, prokaryotes - the original form of life.
Category: Physics of Biology

[21] viXra:1911.0271 [pdf] submitted on 2019-11-16 07:43:53

Carbon Nanotube Controlling Neural Cell

Authors: George Rajna
Comments: 66 Pages.

Researchers of the Microelectronics Research Unit (MIC) at the University of Oulu, in collaboration with Tampere University, have demonstrated that carbon nanotubes can be used to control the direction of neural cell growth. [40] Now Shulaker and his team in Department of Electrical Engineering and Computer Science, alongside researchers at Analog Devices, Inc.(ADI) also in Massachusetts USA, have taken on a series of challenges that have hampered carbon nanotube (CNT) computers since the first carbon nanotube transistors were reported in the late 1990s. [39] Scientists at Texas Heart Institute (THI) and Rice University have used biocompatible fibres made of carbon nanotubes (CNTs) as electrical bridges to restore conductivity to damaged hearts. [38]
Category: Physics of Biology

[20] viXra:1911.0253 [pdf] submitted on 2019-11-14 10:52:41

Molecular Chirality Changes

Authors: George Rajna
Comments: 22 Pages.

The researchers have generated femtosecond laser pulses, with tailor-made, temporally varying polarizations, which are themselves chiral. [17] The scientists identified a shortlist, a kind of "periodic table" of the most designable knot types, i.e. those knots that could easily self-assemble under appropriate physical and chemical conditions. [16] Scientists have now observed for the first time how diamonds grow from seed at an atomic level, and discovered just how big the seeds need to be to kick the crystal growing process into overdrive. [15] The researchers engineered diamond strings that can be tuned to quiet a qubit's environment and improve memory from tens to several hundred nanoseconds, enough time to do many operations on a quantum chip. [14] Intel has announced the design and fabrication of a 49-qubit superconducting quantum-processor chip at the Consumer Electronics Show in Las Vegas. To improve our understanding of the so-called quantum properties of materials, scientists at the TU Delft investigated thin slices of SrIrO3, a material that belongs to the family of complex oxides. [12] New research carried out by CQT researchers suggest that standard protocols that measure the dimensions of quantum systems may return incorrect numbers. [11] Is entanglement really necessary for describing the physical world, or is it possible to have some post-quantum theory without entanglement? [10] A trio of scientists who defied Einstein by proving the nonlocal nature of quantum entanglement will be honoured with the John Stewart Bell Prize from the University of Toronto (U of T). [9] While physicists are continually looking for ways to unify the theory of relativity, which describes large-scale phenomena, with quantum theory, which describes small-scale phenomena, computer scientists are searching for technologies to build the quantum computer using Quantum Information. In August 2013, the achievement of "fully deterministic" quantum teleportation, using a hybrid technique, was reported. On 29 May 2014, scientists announced a reliable way of transferring data by quantum teleportation. Quantum teleportation of data had been done before but with highly unreliable methods. The accelerating electrons explain not only the Maxwell Equations and the Special Relativity, but the Heisenberg Uncertainty Relation, the Wave-Particle Duality and the electron's spin also, building the Bridge between the Classical and Quantum Theories. The Planck Distribution Law of the electromagnetic oscillators explains the electron/proton mass rate and the Weak and Strong Interactions by the diffraction patterns. The Weak Interaction changes the diffraction patterns by moving the electric charge from one side to the other side of the diffraction pattern, which violates the CP and Time reversal symmetry. The diffraction patterns and the locality of the self-maintaining electromagnetic potential explains also the Quantum Entanglement, giving it as a natural part of the Relativistic Quantum Theory and making possible to build the Quantum Computer with the help of Quantum Information.
Category: Physics of Biology

[19] viXra:1911.0240 [pdf] submitted on 2019-11-13 11:40:36

L'évolution Des Espèces en Question

Authors: Vialla Stéphane
Comments: 4 Pages. français

Dans cet article je reviens sur les trois mécanismes qui régissent l'évolution des espèces: l'environnement de Charles Darwin, l'épigénétique de Jean baptiste Lamarck et la génétique dont l'origine tient dans les travaux de G. Mendel. Je conclus avec une proposition d'un mécanisme génétique propre supplémentaire intervenant dans l'évolution des espèces.
Category: Physics of Biology

[18] viXra:1911.0227 [pdf] submitted on 2019-11-12 10:44:29

Sound Waves Target Drugs to Tumors

Authors: George Rajna
Comments: 39 Pages.

But a new ultrasonic method proposed by biomedical engineers from Qifa Zhou's team at the University of Southern California in Los Angeles could enable acoustic control and real-time tracking of drug release within the body. [24] A Rutgers-led team has created better biosensor technology that may help lead to safe stem cell therapies for treating Alzheimer's and Parkinson's diseases and other neurological disorders. [23]
Category: Physics of Biology

[17] viXra:1911.0197 [pdf] submitted on 2019-11-11 07:46:12

DNA Signaling Pathways

Authors: George Rajna
Comments: 35 Pages.

When cells suffer DNA damage, they send out an SOS signal. When the repair crew arrives, the emergency signal is cancelled as it is no longer needed. [21] Now, in a new paper published in Nature Structural & Molecular Biology, Mayo researchers have determined how one DNA repair protein gets to the site of DNA damage. [20] A microscopic thread of DNA evidence in a public genealogy database led California authorities to declare this spring they had caught the Golden State Killer, the rapist and murderer who had eluded authorities for decades. [19]
Category: Physics of Biology

[16] viXra:1911.0196 [pdf] submitted on 2019-11-11 08:03:52

DNA Genetic Molecules

Authors: George Rajna
Comments: 37 Pages.

Biology encodes information in DNA and RNA, which are complex molecules finely tuned to their functions. [22] When cells suffer DNA damage, they send out an SOS signal. When the repair crew arrives, the emergency signal is cancelled as it is no longer needed. [21] Now, in a new paper published in Nature Structural & Molecular Biology, Mayo researchers have determined how one DNA repair protein gets to the site of DNA damage. [20]
Category: Physics of Biology

[15] viXra:1911.0195 [pdf] submitted on 2019-11-11 08:19:50

Understanding Antibiotic Synthesis

Authors: George Rajna
Comments: 39 Pages.

Researchers at McGill University's Faculty of Medicine have made important strides in understanding the functioning of enzymes that play an integral role in the production of antibiotics and other therapeutics. [23] Biology encodes information in DNA and RNA, which are complex molecules finely tuned to their functions. [22] When cells suffer DNA damage, they send out an SOS signal. When the repair crew arrives, the emergency signal is cancelled as it is no longer needed. [21]
Category: Physics of Biology

[14] viXra:1911.0191 [pdf] submitted on 2019-11-11 10:48:37

Biosensor for Stem Cells

Authors: George Rajna
Comments: 38 Pages.

A Rutgers-led team has created better biosensor technology that may help lead to safe stem cell therapies for treating Alzheimer's and Parkinson's diseases and other neurological disorders. [23] Biology encodes information in DNA and RNA, which are complex molecules finely tuned to their functions. [22] When cells suffer DNA damage, they send out an SOS signal. When the repair crew arrives, the emergency signal is cancelled as it is no longer needed. [21]
Category: Physics of Biology

[13] viXra:1911.0190 [pdf] submitted on 2019-11-11 10:56:10

Diagnostics into Your Hand

Authors: George Rajna
Comments: 40 Pages.

Handheld electrochemical sensors are part of the daily routine for millions of people with diabetes around the globe who monitor their blood sugar levels with electric glucometers. [24] A Rutgers-led team has created better biosensor technology that may help lead to safe stem cell therapies for treating Alzheimer's and Parkinson's diseases and other neurological disorders. [23]
Category: Physics of Biology

[12] viXra:1911.0172 [pdf] submitted on 2019-11-09 04:40:07

Photosynthesis by X-Ray Pules

Authors: George Rajna
Comments: 29 Pages.

In a new study, led by Petra Fromme and Nadia Zatsepin at the Biodesign Center for Applied Structural Discovery, the School of Molecular Sciences and the Department of Physics at ASU, researchers investigated the structure of Photosystem I (PSI) with ultrashort X-ray pulses at the European X-ray Free Electron Laser (EuXFEL), located in Hamburg, Germany. [14] Researchers have discovered a new role for protein vibrations in controlling the transformation of sunshine into useful energy. [13] University Professor of Applied Physics Stephen Arnold and his team at the New York University Tandon School of Engineering have made a discovery that could lead to Star Trek-like biosensor devices capable of flagging the barest presence in blood of a specific virus or antibody, or protein marker for a specific cancer; or sniffing out airborne chemical warfare agents while they are still far below toxic levels. [12]
Category: Physics of Biology

[11] viXra:1911.0124 [pdf] submitted on 2019-11-07 05:27:56

Treatment to Stroke Patients

Authors: George Rajna
Comments: 66 Pages.

Swarms of nanoparticles which are 15,000 times smaller than a pinhead may be able to deliver vital drugs to the brain, offering new hope to patients in the early stages of a stroke. [42] An international team of researchers has used nanoparticles to deliver a drug—one that previously failed in clinical trials for pain—into specific compartments of nerve cells, dramatically increasing its ability to treat pain in mice and rats. [41] MIT engineers have shown that they can enhance the performance of drug-delivery nanoparticles by controlling a trait of chemical structures known as chirality—the "handedness" of the structure. [40]
Category: Physics of Biology

[10] viXra:1911.0106 [pdf] submitted on 2019-11-06 03:35:10

Nanoparticle Drug Delivery

Authors: George Rajna
Comments: 63 Pages.

MIT engineers have shown that they can enhance the performance of drug-delivery nanoparticles by controlling a trait of chemical structures known as chirality-the "handedness" of the structure. [40] The process, developed by Nagoya University researchers in Japan, could be upscaled for manufacturing purified batches of single-wall carbon nanotubes that can be used in high-performance electronic devices. [39] Scientists at Texas Heart Institute (THI) and Rice University have used biocompatible fibres made of carbon nanotubes (CNTs) as electrical bridges to restore conductivity to damaged hearts. [38] A team of researchers from China, the U.S. and Japan has developed a way to strengthen graphene-based membranes intended for use in desalination projects-by fortifying them with nanotubes. [37] The team arrived at their results by imaging gold nanoparticles, with diameters ranging from 2 to 5 nanometres, via aberration corrected scanning transmission electron microscope. [36] Nanoparticles of less than 100 nanometres in size are used to engineer new materials and nanotechnologies across a variety of sectors. [35] For years, researchers have been trying to find ways to grow an optimal nanowire, using crystals with perfectly aligned layers all along the wire. [34] Ferroelectric materials have a spontaneous dipole moment which can point up or down. [33] Researchers have successfully demonstrated that hypothetical particles that were proposed by Franz Preisach in 1935 actually exist. [32] Scientists from the Department of Energy's SLAC National Accelerator Laboratory and the Massachusetts Institute of Technology have demonstrated a surprisingly simple way of flipping a material from one state into another, and then back again, with single flashes of laser light. [31]
Category: Physics of Biology

[9] viXra:1911.0104 [pdf] submitted on 2019-11-06 04:06:44

Nanoparticle Pain Relief

Authors: George Rajna
Comments: 64 Pages.

An international team of researchers has used nanoparticles to deliver a drug-one that previously failed in clinical trials for pain-into specific compartments of nerve cells, dramatically increasing its ability to treat pain in mice and rats. [41] MIT engineers have shown that they can enhance the performance of drug-delivery nanoparticles by controlling a trait of chemical structures known as chirality-the "handedness" of the structure. [40] The process, developed by Nagoya University researchers in Japan, could be upscaled for manufacturing purified batches of single-wall carbon nanotubes that can be used in high-performance electronic devices. [39] Scientists at Texas Heart Institute (THI) and Rice University have used biocompatible fibres made of carbon nanotubes (CNTs) as electrical bridges to restore conductivity to damaged hearts. [38] A team of researchers from China, the U.S. and Japan has developed a way to strengthen graphene-based membranes intended for use in desalination projects-by fortifying them with nanotubes. [37] The team arrived at their results by imaging gold nanoparticles, with diameters ranging from 2 to 5 nanometres, via aberration corrected scanning transmission electron microscope. [36] Nanoparticles of less than 100 nanometres in size are used to engineer new materials and nanotechnologies across a variety of sectors. [35] For years, researchers have been trying to find ways to grow an optimal nanowire, using crystals with perfectly aligned layers all along the wire. [34] Ferroelectric materials have a spontaneous dipole moment which can point up or down. [33] Researchers have successfully demonstrated that hypothetical particles that were proposed by Franz Preisach in 1935 actually exist. [32]
Category: Physics of Biology

[8] viXra:1911.0082 [pdf] submitted on 2019-11-05 04:50:18

Dietary Carbon Nanotube Fiber

Authors: George Rajna
Comments: 61 Pages.

The process, developed by Nagoya University researchers in Japan, could be upscaled for manufacturing purified batches of single-wall carbon nanotubes that can be used in high-performance electronic devices. [39] Scientists at Texas Heart Institute (THI) and Rice University have used biocompatible fibres made of carbon nanotubes (CNTs) as electrical bridges to restore conductivity to damaged hearts. [38] A team of researchers from China, the U.S. and Japan has developed a way to strengthen graphene-based membranes intended for use in desalination projects-by fortifying them with nanotubes. [37] The team arrived at their results by imaging gold nanoparticles, with diameters ranging from 2 to 5 nanometres, via aberration corrected scanning transmission electron microscope. [36] Nanoparticles of less than 100 nanometres in size are used to engineer new materials and nanotechnologies across a variety of sectors. [35] For years, researchers have been trying to find ways to grow an optimal nanowire, using crystals with perfectly aligned layers all along the wire. [34] Ferroelectric materials have a spontaneous dipole moment which can point up or down. [33] Researchers have successfully demonstrated that hypothetical particles that were proposed by Franz Preisach in 1935 actually exist. [32] Scientists from the Department of Energy's SLAC National Accelerator Laboratory and the Massachusetts Institute of Technology have demonstrated a surprisingly simple way of flipping a material from one state into another, and then back again, with single flashes of laser light. [31] Materials scientists at Duke University computationally predicted the electrical and optical properties of semiconductors made from extended organic molecules sandwiched by inorganic structures. [30]
Category: Physics of Biology

[7] viXra:1911.0060 [pdf] submitted on 2019-11-04 03:31:28

Fluorescent Probes Drug Delivery

Authors: George Rajna
Comments: 68 Pages.

Selecting the most effective molecules for drug delivery is often a trial-and-error process, but Cornell engineers are providing some precision thanks to a technique that reveals the performance of those molecules inside living cells. [45] Now, researchers at MIT and elsewhere have developed a system to deliver medical treatments that can be released at precise times, minimally-invasively, and that ultimately could also deliver those drugs to specifically targeted areas such as a specific group of neurons in the brain. [44] Gene editing technology is a technology that eliminates the underlying causes of and treats diseases by removing specific genesor editing genes to restore their normal function. In particular, CRISPR gene editing technology is now commonly used for immunotherapy by correcting the genes of immune cells to induce them to attack cancer cells selectively. [43]
Category: Physics of Biology

[6] viXra:1911.0057 [pdf] submitted on 2019-11-04 08:34:12

Spin on Life's Origin

Authors: George Rajna
Comments: 25 Pages.

This research may also enable new synthesis pathways for chiral drugs that do not require chiral molecules as inputs. [13] The conditions for life surviving on planets entirely covered in water are more fluid than previously thought, opening up the possibility that water worlds could be habitable, according to a new paper from the University of Chicago and Pennsylvania State University. [12]
Category: Physics of Biology

[5] viXra:1911.0054 [pdf] submitted on 2019-11-04 10:14:55

Protein EPR Spectroscopy

Authors: George Rajna
Comments: 53 Pages.

Biochemists can use electron paramagnetic resonance (EPR) on protein single crystals to determine the ultimate electronic structure of paramagnetic protein intermediates and investigate the relative magnetic tensor to a molecular structure. [28] Random bit sequences are key ingredients of various tasks in modern life and especially in secure communication. In a new study researchers have determined that generating true random bit sequences, classical or quantum, is an impossible mission. [27] A quantum circuit that can unambiguously test for information scrambling in an experiment could help verify the calculations of quantum computers and even shed more light on what happens to quantum information when it falls into a black hole. [26]
Category: Physics of Biology

[4] viXra:1911.0048 [pdf] submitted on 2019-11-03 02:55:47

Stretchable Stopwatch for Human Skin

Authors: George Rajna
Comments: 63 Pages.

Such human-machine interfaces are no longer science fiction, but they still have a way to go before becoming mainstream. [38] With further engineering, the vertical semiconductor-graphene-semiconductor transistor is promising for high-speed applications in future 3-D monolithic integration because of the advantages of atomic thickness, high carrier mobility, and the high feasibility of a Schottky emitter. [37] Scientists at the U.S. Department of Energy's Brookhaven National Laboratory have new experimental evidence and a predictive theory that solves a long-standing materials science mystery: why certain crystalline materials shrink when heated. [36] In a new study now published A team of scientists are seeking to kick-start a wearable technology revolution by creating flexible fibres and adding acids from red wine. [33] An inexpensive way to make products incorporating nanoparticles-such as high-performance energy devices or sophisticated diagnostic tests-has been developed by researchers. [32] Researchers from Empa and ETH Zurich, together with colleagues from IBM Research Zurich, have recently been able to create this effect with long-range ordered nanocrystal superlattices. [31] The optical tweezer is revealing new capabilities while helping scientists understand HYPERLINK "https://phys.org/tags/quantum+mechanics/" quantum mechanics, the theory that explains nature in terms of subatomic particles. [30] In the perspective, Gabor and Song collect early examples in electron metamaterials and distil emerging design strategies for electronic control from them. [29]
Category: Physics of Biology

[3] viXra:1911.0032 [pdf] submitted on 2019-11-02 05:46:44

Controlling Cell Immune Response

Authors: George Rajna
Comments: 71 Pages.

Scientists at Tomsk Polytechnic University jointly with the University of Montana (USA) proposed a promising new material for regenerative medicine for recovery of damaged tissues and blood vessels. [44] Nanocapsules and other containers can transport drugs through a patient's body directly to the origin of the disease and release them there in a controlled manner. [43] Coupier has found that deflating and inflating microscopic shells can induce directed motion, which could, for example, be used to help target drug delivery to a tumour. [42]
Category: Physics of Biology

[2] viXra:1911.0031 [pdf] submitted on 2019-11-02 06:54:44

Tiny Swimming Donuts

Authors: George Rajna
Comments: 73 Pages.

The researchers note that "these biocompatible, 3-D printed micro swimmers would then be able to interface and manipulate biological active matter leading to the development of intelligent cell transport and therapy." [45] Scientists at Tomsk Polytechnic University jointly with the University of Montana (USA) proposed a promising new material for regenerative medicine for recovery of damaged tissues and blood vessels. [44] Nanocapsules and other containers can transport drugs through a patient's body directly to the origin of the disease and release them there in a controlled manner. [43]
Category: Physics of Biology

[1] viXra:1911.0005 [pdf] submitted on 2019-11-01 07:48:42

Conduction Through Proteins

Authors: George Rajna
Comments: 38 Pages.

In new research, Stuart Lindsay and his colleagues investigate a recently discovered feat carried out by enzymes, and most likely, all proteins. [23] An advanced imaging technique reveals new structural details of S-DNA, ladder-like DNA that forms when the molecule experiences extreme tension. [22] Histones are proteins that regulate the unwinding of DNA in the cell nucleus and the expression of genes based on chemical modifications or "marks" that are placed on their tails. [21]
Category: Physics of Biology