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Protons in Medical News

Proton-powered pooping

... of Utah scientists discovered that bare subatomic protons can act like larger, more complex ... to trigger electrical changes in cells. protons are the only new members of this group in nearly ... of many atoms, the new study revealed a surprise: protons which are single hydrogen atoms stripped of ...

ProCure Treatment Centers to Equip Chicago Facility With Software Solutions From Elekta

... most robust dose calculation algorithms, XiO allows users to generate quick and accurate treatment plans. Developed more than a decade ago, XiO for protons is in clinical use at more proton facilities than any other commercial vendor. Vendor-neutral, XiO also is used in conjunction with IBA, Varian and ...

Compact cancer-therapy particle-delivery system patented

... Unlike conventional radiation beams, which deposit energy as they travel through healthy tissue on the way to internal tumors, particle beams made of protons or charged ions, such as carbon, deposit most of their energy at the cancerous tumor. Thus, precisely aimed particle beams have more cancer-killing ...

Mini heart attacks lessen damage from major ones

... The cell's powerhouse, mitochondria use oxygen to convert nutrients into cellular energy supply. As they do so, they create a gradient of protons across their membranes. When the gradient becomes too large, it triggers the mitochondria to use oxygen to generate free radicals. The problem gets ...

Proton therapy may reduce serious side effect of lung cancer treatment

... (IMRT). The remaining 67 patients received chemotherapy and proton beam therapy. Proton beam therapy is a type of external beam therapy that uses protons rather than photons to kill fast growing cancer cells. "Because proton therapy allows us to control the radiation differently than other types of ...

Groundbreaking cancer studies to be unveiled at ASTRO annual meeting

... Compared To Standard Radiation Treatment Patients who are treated with proton therapy (a specialized type of external beam radiation therapy using protons rather than X-rays to treat cancer) decreases the risk of patients developing a secondary cancer by two-fold, compared to being treated with standard ...

Cancer research highlights

... oncologists to adjust the energy delivered to the tumor assuring that the prescribed energy is delivered at right location. Since high energy protons and photons induce gamma rays via interaction with nuclei in the human body by imaging the gamma rays, one could see the location and measure the ...

Siemens Consortium to Construct Particle Therapy Center at the University Clinic of Schleswig-Holstein

... The company will contribute its extensive experience in financing, construction, and building operation to the Kiel project. In particle therapy, protons or carbon ions are accelerated to a very high speed by an accelerator system and then applied precisely to the target tissue. Calculation and control ...

Iowa State chemists track how drug changes, blocks flu virus

... it inside the cell through a process called endocytosis. Once in the cell, the virus uses a protein called M2 to open a channel to the healthy cell. protons from the healthy cell flow through the channel into the virus and raise its acidity. That triggers the release of the virus genetic material into the ...

Penn researchers discover new target for preventing and treating flu

... the Jan. 31 issue of the journal Nature. The M2 protein is located in the viral envelope, forming a long, narrow channel that allows the flow of protons into the viral interior, an essential step for infection. Amantadine sits in this channel and blocks the flow of protons, thus halting infection. In ...

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Protons in Medical Technology

New Proton Therapy Equipment Enables More Tumors to be Treated

... Feb. 23 /PRNewswire/ -- An advance in the way protons are delivered at the University of Florida ... scanning, the new device moves a single beam of protons in a sweeping or "scanning" motion, enabling the ... round filters that limited how deep and how wide protons could travel into the body. Proton therapy ...

Battelle Scientists Named on Patent for Making Oxygen From Light and Water

... relies on a photochemical reaction that uses a special catalyst that takes protons and electrons from water and makes molecular oxygen without producing hydrogen gas. Then, the protons and electrons can be used for other purposes, such as trapping carbon ...

MRI Emerges As Vital Resource in Treatment of Back Pain

... ) vascular disorders trauma MRI scans are produced by stimulating the protons in tissues and liquids (such as fat, muscle, spinal cord, and fluid in the spine) using radiofrequency waves in the presence of a magnetic field. MRI ...
Protons in Biological News

Wastewater produces electricity and desalinates water

... the wastewater it releases charged ions -- protons -- into the water. These protons cannot pass the anion membrane, so negative ions ... the wastewater chamber. At the other electrode protons are consumed, so positively charged ions move ...

Two-day symposium in Baltimore to tackle the promises and perils of proton radiotherapy

... and creating therapeutic beam of protons. In theory, a thin beam of protons can destroy a tumor with less damage to surrounding tissues than the broader cone of X-ray photons. This is because the protons penetrate a specific distance into the body and release most of their ...

Microbial fuel cells turn on the juice

... cathode chambers. When hydrogen meets the anode electrode, it splits into protons and electrons, with protons going across the membrane to the cathode chamber, and electrons passing ...

Small animal imaging facility is big boon to research

... When powerful magnets line up the bodys protons before radiofrequency waves can grab their attention away, its called spin ... Georgia. But if you put an object in the MRI, the magnet will line up the protons and what that does is generate the original, steady state. Then, by ...

Sulphur in just one hair could blow a terrorist's alibi

... of Oviedo, Spain, have come up with a method to detect how the proportions of isotopes in a chemical element (atoms with an equal number of protons and electrons but different numbers of neutrons) vary throughout the length of a single hair. The mid-term objective is to be able to use these ...

Turning sunlight into liquid fuels

... carry out the critical photosynthetic reaction of splitting water molecules. "Photooxidation of water molecules into oxygen, electrons and protons (hydrogen ions) is one of the two essential half reactions of an artifical photosynthesis system - it provides the electrons needed to reduce carbon ...

Louisiana Tech physicists highlight top 10 science stories of 2008

... has begun the transition to LHC-related work," says Sawyer, head of the physics department at Louisiana Tech. The LHC accelerates two streams of protons toward each other at nearly 99.99% of the speed of light in an effort to prove, or possibly disprove, the "Big Bang Theory." It could also explain ...

Europe rallies behind nanotechnology to wean world from fossil fuels

... and a class of bacteria, cyanobacteria, have evolved photosynthesis, involving the harvesting of light and the splitting of water into electrons and protons to provide a stream of energy that in turn produces the key molecules of life. Photosynthesis can potentially be harnessed either in ...

UC Santa Barbara has key role in Large Hadron Collider project

... back again, scientists at the Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) in Geneva fired the first beams of protons that they hope will eventually produce history-making science. A contingent of more than 40 faculty members, graduate students, postdoctoral ...

Molecular cubes in the sunlight

... in a battery: that is electrical energy is converted to chemical energy. The electrolysis of water involves two half reactions: at the cathode, protons (positively charged hydrogen ions) are reduced to hydrogen, whereas at the anode the oxidation of water produces oxygen. The goal of the researchers ...

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Protons in Biological Technology

A single VSOP can do a 'proton' magic!

... that a single protein of VSOP, Voltage Sensor Only Protein/ Hv1, can carry protons even without making a multimeric complex. Since VSOP is known to be ... but here we clearly showed that a single subunit of VSOP can carry protons without making any assembling hole. This finding may help to design new ...

Biological electron transfer captured in real time

... is to couple electron transfer to the translocation of positively charged protons across the membrane, so that the mitochondrial membrane (or the cell ... second phase, the voltage difference of the battery is used to drive the protons back across the membrane, coupled to the synthesis of ATP by very special ...

Berkeley scientists bring MRI/NMR to microreactors

... molecular forms are diatomic, but in orthohydrogen, the spins of the two protons in the nuclei are pointed in the same direction, whereas in parahydrogen, the spins of the two protons point in opposite directions. By increasing the fraction of parahydrogen ...

Young's experiment in a hydrogen molecule

... smallest system existing - a molecule of hydrogen -, which consists of two protons and two electrons. The research team used light generated by the large ... (USA), to extract the two electrons from the molecule of hydrogen. The two protons carry out the role of the two electron-emitting apertures, separated by an ...

Stanford researchers find a quicker, cheaper way to sort isotopes

... that is bouncing back and forth off a set of mirrors inside a special container. The atoms of a particular element all have the same number of protons in their core, but may have differing numbers of neutrons. Carbon, for example, has six protons, but the number of neutrons in carbon atoms can vary ...

Understanding the science of solar-based energy: more researchers are better than one

... charge. The interaction of the system's electrical charge and an oxygen catalyst produce oxygen gas and positively charged hydrogen ions or protons from water. The electrical charge, in combination with a hydrogen catalyst and protons, produces hydrogen gas. "These transformations will require ...

Carnegie Mellon MRI technology that noninvasively locates, quantifies specific cells in the body

... into an animal subject and tracks the cells in vivo using 19F MRI. While conventional MRI detects the nuclear magnetic resonance signal from protons contained in the mobile water in tissue, 19F MRI detects the signal from the nucleus of the fluorine atom. Fluorine is not normally present in the ...

University of Pennsylvania scientists move optical computing closer to reality

... conventional electronic circuits. Such devices could eventually find applications in the developing area of high-speed optical computing, in which protons and light replace electrons and transistors for greater performance. Colleagues in the Department of Bioengineering, Alexander A. Govyadinov and ...

NIST/NIH micromagnets show promise as colorful 'smart tags' for magnetic resonance imaging

... geometry, perhaps by widening the gap between the discs or changing the discs' thickness or diameter. As water in a sample flows between the discs, protons acting like twirling bar magnets within the water's hydrogen atoms generate predictable RF signals-the stronger the magnetic field, the faster the ...

Ames Laboratory researchers solve fuel-cell membrane structure conundrum

... this structure of relatively wide diameter channels, densely packed and running mostly parallel through the material that helps explain how water and protons can so easily diffuse through Nafion, almost as easily as water passing through water Schmidt-Rohr said. To unlock the structure mystery, ...
Protons in Biological Products

Pectinase from Sigma-Aldrich

Description:... Unit Definition: 1 U corresponds to the amount of enzyme which produces 1 mol protons per minute at pH 5.5 and 30C (peptin from citrus peel, Fluka-No. 76280, as ...
Company:Sigma-Aldrich
Protons in Biological Definition

Mitochondrion

... the transfer use the released energy to pump protons (H + ) against a gradient (the concentration of protons in the intermembrane space is higher than that in ... transport system (energy requiring) pumps the protons against their physical tendency (in the "wrong" ...

Mitochondrion

... the transfer use the released energy to pump protons (H + ) against a gradient (the concentration of protons in the intermembrane space is higher than that in ... transport system (energy requiring) pumps the protons against their physical tendency (in the "wrong" ...

Proton pump

... membrane protein that is capable of moving protons across the membrane of a cell , ... of protons. For example, the translocation of protons by cytochrome c oxidase is powered by reducing ... of chloroplasts, in contrast, usually conduct protons from high to low concentration across the ...

Flagellum

... . The engine is powered by proton motive force , i.e., by the flow of protons (i.e., hydrogen ions ) across the bacterial cell membrane due to a ... a sodium ion pump, rather than a proton pump ). The rotor transports protons across the membrane, and is turned in the process. The rotor by itself can ...

Oxidative phosphorylation

... complex called ATP synthase is embedded in that membrane and enables protons to pass through in both directions; it generates ATP when the proton ... and it costs ATP to pump a proton against (up) the gradient. Because protons have already been pumped into the intermembrane space against the ...

ATP synthase

... of a cylinder of 6 subunits , alternating alpha and beta subunits, that form a ring around an asymmetrical gamma subunit. Facilitated diffusion of protons causes the F O particle to rotate, rotating the gamma subunit of F 1 , while the major F 1 subunits are fixed in place. This rotation forces a ...

ATPase

... motion bonds ADP and P together to create ATP. ATP synthetase can also function in reverse; that is, use energy released by ATP hydrolysis to pump protons against their thermodynamic gradient. External links "ATP synthase - a splendid molecular machine" ...

Ion gradient

... generation, NADPH synthesis and ATP synthesis/hydrolysis. Some archaea , most notably halobacteria , make proton gradients by pumping in protons from the environment with the help of the solar driven enzyme bacteriorhodopsin , here it is used for driving the molecular motor enzyme ATP ...

Electron transfer chain

... to create ATP . Complex IV is the terminus of the electron transfer chain , where oxygen from the lungs is reduced by electrons and hydrogen protons (provided by NADH and/or FADH2 ) to make water . Cytochrome c Cytochrome c is also an essential part of the electron transfer chain ...

Enzyme

... can digest proteins Coenzyme Q - cytochrome c reductase : participates in the electron transfer chain by reducing cytochrome c and pumping protons across the membrane Cytochrome c oxidase : endpoint of the electron transfer chain, where oxygen is reduced to water Cytochrome c peroxidase ...

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Protons in Biological Dictionary

Protons

... protons and neutrons are both nucleons, which may be ... force ... atoms are composed of two or more protons and various numbers of neutrons. ... ... from deep inelastic scattering ... Along with protons , neutrons make up the nucleus, held together by ...

Atom

... electrons. The atomic nucleus contains a mix of positively charged protons and electrically ... Intel Atom is the brand name for a line ... called a nucleus. ... ... atom will have the same number of protons and electrons and most atoms have ... Return to the Atoms , Elements ...

Proton-motive force

... ... The existence of proton - motive force enabled the evolution of porters driven by ... generated electrochemical gradients of protons ( proton - motive force ) across their ... The existence of proton - motive force enabled the evolution of porters driven ... ... of ...

Proton pump

... A proton pump is an integral membrane protein that is capable of moving protons across the membrane of a cell, mitochondrion, or other subcellular compartment. Proton pump inhibitors (or "PPI"s) are a group of ...

IS element

... A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus. The term is also used to refer to a pure chemical ... An insertion sequence is a short DNA sequence that acts ...

Elements

... A chemical element is a pure chemical substance consisting of one type of atom distinguished by its atomic number, which is the number of protons in its nucleus. The term is also used to refer to a pure chemical ... (Redirected from Elements ) Jump to: navigation, search ... ...

Electron transport chain

... ELECTRON TRANSPORT CHAIN AND OXIDATIVE PHOSPHORYLATION. Introduction ... Some electron carriers of the transport chain accept and release protons along ... Electron transport chain summary with 15 pages of encyclopedia entries, essays, summaries, ... Induces Diaphragm Electron ...

Chemiosmosis

... ... Chemiosmosis . ATP is produced in the chloroplast by Chemiosmosis . Chemiosmosis requires a phospholipid bilayer, a proton pump, protons and ATPase. ... Cristae (singular crista) are the internal compartments formed by the inner ... As a result, chemiosmosis occurs, producing ATP ...

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