Diffusion

Abnormal Brain Circuits May Prevent Movement Disorder

... of the study published in the Journal of Neuroscience, said that they used diffusion tensor imaging - a type of magnetic resonance imaging (MRI) that measures c...lberg. The puzzle was why. In the latest study, the new advances in diffusion imaging allowed them to see something for the first time. They saw that the...

State privacy rules reduce electronic medical sharing by 24 percent, warns Management Insights

... enact privacy protection. This privacy protection may be of benefit to the diffusion of information-sharing technologies if it reassures consumers, or it may inhibit the diffusion of information sharing technologies if it imposes costs on firms who adopt ...

Virginia Bioinformatics Institute to develop petascale computer modeling capabilities

...opulations at the level of the individual can realistically be simulated on distributed computer networks. The goal of the proposal "Coupled Models of diffusion and Individual Behavior Over Extremely Large Social Networks" is to use new computer technology breakthroughs to study events like disease pandemics, ...

Alterations in brain's white matter key to schizophrenia, UCLA study shows

.... Historically, looking at white matter has been hard to do. But in recent years, she said, researchers have begun to use a relatively new technique, diffusion tensor imaging (DTI) that uses the movement of water molecules along white matter tracts to map out the brain's pathways. In the last few years, these...

Researchers to Monitor Public Perception of Swine Flu Outbreaks Using Technology from Realtime Search Engine, OneRiot

...se the large amount of realtime data provided by OneRiot, in conjunction with official public health surveillance data, to discern patterns in disease diffusion and public perception of health scare outbreaks. Previous studies have shown the benefit of analyzing data abstracted from internet searches in foreca...

Non-invasive test accurately identifies gynecologic malignancies

... diffusion weighted MR can accurately identify benign from malignant pelvic lymph node...rding to a study performed at Massachusetts General Hospital in Boston, MA. diffusion weighted imaging is a noninvasive test that uses an MRI sequence sensitized...

Diffusion in Medical Technology

Tiny Cup Attached to Eye Improves Drug Delivery For Retinal Diseases

...tiva, or covering of the eyeball, to the sclera -- the fibrous, protective outer layer of the eye. The tiny cup administers the drug slowly by passive diffusion through the sclera, where it reaches the retina and vitreous. The device is so small the patient should feel little or no discomfort and it does not h...

AFRESA(R) Phase 3 Pulmonary Function Safety Data in Patients with Diabetes Presented at ADA

...0 ml/year). Secondary endpoints included change from baseline in other PFT parameters (forced vital capacity, total lung capacity, and carbon monoxide diffusion test). Consistent with the normal course of aging, PFTs declined in all groups, including the nondiabetic group. Based on the predefined endpoin...

10-State Project to Study Methods to Reduce Central Line-Associated Bloodstream Infections in Hospital ICUs

...ns and Networks initiative, an implementation model of field-based research designed to promote innovation in health care delivery by accelerating the diffusion of research into practice. For more information on AHRQ's patient safety research, visit http://www.ahrq.gov/qual/errorsix.htm . A number of add...

Heavy Marijuana Use May Damage Developing Brain in Teens, Young Adults

...tudy leader Manzar Ashtari, Ph.D., director of the diffusion Image Analysis and Brain Morphometry Laboratory in...d a type of magnetic resonance imaging scan called diffusion tensor imaging (DTI) that measures water movement ...ugh brain tissues. "The abnormal patterns of water diffusion that we found among the young men with histories o...

Novexel to Present Five Posters at the Joint Annual Interscience Conference on Antimicrobial Agents and Chemotherapy and the Infectious Disease Society of America (ICAAC/IDSA) Meeting

...tion of the inhibitor (NXL104) that suppresses beta-lactamase activity. (Poster A-023). A second poster describes the use of a ceftazidime/NXL104 disk diffusion assay for the detection and identification of the Klebsiella pneumoniae carbapenemase enzyme (KPC) in Enterobacteriaceae (Poster D-291b). The third po...

Diffusion Pharmaceuticals Announces Initiation of a Phase I/II Clinical Trial in Patients with Peripheral Arterial Disease (PAD)

...th CHARLOTTESVILLE, Va., Sept. 3 /PRNewswire/ -- diffusion Pharmaceuticals LLC, a clinical-stage drug-develop...sing a novel mechanism of action, TSC enhances the diffusion of oxygen through blood plasma, increasing the rat...s a treatment for PAD is premised on enhancing the diffusion of oxygen through blood plasma to alleviate the cl...

Diffusion in Medical Products

Biotrace Sterile Barium Sulfate USP

Description:...odays medical professionals who administer bone cement via minimally invasive surgery. Comprised of a uniform particle size, Biotrace provides an even diffusion of sterile barium, resulting in a consistent visualization of bone cement placement under fluoroscopic guidance. Biotrace is the leading bone cem...
Company:Bryan Corporation

Criterion™ II Urine Analyzer

Description:...cludes absorbent pads underlying the reagent pad held in place by a mesh laminate overlay, rather than adhesive. This facilitates absorbency and rapid diffusion of the sample, prevents chemical runover onto adjacent strips, and provides easy-to-read, uniform, distinct color changes....
Company:Roche Diagnostics

Qflow 400 (Research Model)

Description:...onitor measures focal tissue perfusion in absolute units continuously in real-time. This precision instrument activates the minimally invasive Thermal diffusion Probe (TDP), which is connected by an umbilical cord to collect the data, convert it to digital form and send the data to a host PC via serial port fo...
Company:Hemedex, Inc.

Vitrasert Sterile Intraviteral Implant

Description:...nciclovir embedded in a polymer-based system that slowly releases the drug. The implant, surgically placed in the posterior segment of the eye, allows diffusion of the drug locally to the site of infection over an extended period of months....
Company:Bausch & Lomb Storz

1000-90 Mid Range Power Supplies - Designed for Maximum Versatility

Features:...to provide the operator with the option of applying a small voltage to the gel at the end of a timed experiment. This holding voltage minimizes sample diffusion prior to the disassembly of the electrophoresis apparatus. ...
Company:ThermoFisher Scientific

570-90 Mid Range Power Supplies

Features:...to provide the operator with the option of applying a small voltage to the gel at the end of a timed experiment. This holding voltage minimizes sample diffusion prior to the disassembly of the electrophoresis apparatus. ...
Company:ThermoFisher Scientific

Diffusion in Medical Definition

Cryostasis (clathrate hydrates)

...ill form a hydrate under some pressure-temperature conditions. [6] Live biological tissues can be saturated with the clathrate-forming gas(es) by diffusion or perfusion at the appropriate pressure in the range 1–50 bars at a temperature above clathrate-forming temperature. After saturation, the biological...

Medical procedure

... Aortography Retinal angiography Abreugraphy Magnetic resonance imaging Diffuse optical imaging Diffusion-weighted imaging diffusion tensor imaging Functional magnetic resonance imaging Computed tomography Corneal topography Positron emission tomography Radio...

Diffusion in Medical Dictionary

Membrane

...industrial, food, chemical, and biotechnology markets. Plasma Membrane and Cellular Transport. Content : - Plasma membrane - LDL, HDL - Simple diffusion ... Arrangement and function of proteins in the membrane . ... Features a collection of diagrams illustrating their molecular structure. Mem...

Diffusion in Biological News

One-dimensional diffusion accelerates molecular motors

Max Planck scientists have identified a new strategy which motor proteins use to move. The research was carried out by Prof. Jonathon Howard and Stefan Diez at the Max Planck Institute of Molecular Cell Biology and Genetics in Dresden. The motor protein MCAK (Mitotic Centromere Associated Kinesi...

Abnormal brain circuits may prevent movement disorder

...f the study published in the Journal of Neuroscience , said that they used diffusion tensor imaging a type of magnetic resonance imaging (MRI) that measures ch...lberg. The puzzle was why. In the latest study, the new advances in diffusion imaging allowed them to see something for the first time. They saw that the...

Brain difference in psychopaths identified

...alled the uncinate fasciculus (UF). However, nobody had ever studied the UF in psychopaths. The team from King's used an imaging method called in vivo diffusion tensor magnetic resonance imaging (DT-MRI) tractography to analyse the UF in psychopaths. They found a significant reduction in the integrity of th...

'Microfluidic palette' may paint clearer picture of biological processes

...usually mix fluids more actively, by pumps and the circulation of currents. diffusion gradients allow cells being studied to remain in the microchamber without the chance of their being swept away. diffusion also permits chemical molecules to move in and out of the cells naturally a...

Spontaneous assembly

...e not actively distributed or attached to specific locations in cells, as had been hypothesized. "Instead," said Liphardt, "random lateral protein diffusion and proteinprotein interactions are probably sufficient to generate the observed complex, ordered patterns. This simple stochastic self-assembly mecha...

UT nanomedicine project to be tested in space

...determine that near weightlessness has been achieved, the experiment will activate itself and begin a series of tests designed to learn more about the diffusion of micro nanoparticles through tiny microchannels measured in millionths of a meter, said Alessandro Grattoni, experiment project manager and senior r...

Diffusion in Biological Technology

Co-Inventor of Amgen's Aranesp(R) Technology Directs Worldwide Patent Strategy for Diffusion Pharmaceuticals' First-in-Class Oxygen Enhancing Therapeutics

CHARLOTTESVILLE, Va., Dec. 21 /PRNewswire/ -- Diffusion Pharmaceuticals LLC, a clinical stage drug-development company commercializing first-in-class drugs utilizing a novel mechanism of action that enhances oxygen diffusion, today announced that one of its key advisors, Mr. Thomas Byrne, was ...

DOR BioPharma Announces Publication of orBec(R) Clinical Pulmonary Data in Bone Marrow Transplantation

...com/bmt/journal/vaop/ncurrent/abs/bmt2009129a.html . Among the data published: A decrease in gas exchange as measured by the diffusion of carbon monoxide from the lung (DLCO) was observed in 33 of 42 (79%) of the placebo-treated patients, from pre-transplant to 80 days after randomiza...

No small measure: Origins of nanorod diameter discovered

...own to the next lowest layer, they begin to stack up and grow higher. It is the cooperation and competition of atoms in this process of multi-layer diffusion that accounts for the fundamental diameter of nanorods, Huang shows in the new study. The rate at which atoms are being deposited onto the surface, a...

Sangart, Inc. Completes Series F Funding Round

...ique polyethylene glycol conjugation with human hemoglobin and was specifically designed to the optimal molecular size, viscosity, oxygen affinity and diffusion potential to target oxygen delivery to tissues at risk of oxygen deprivation based on experiments with artificial capillaries and in several different...

Diffusion Pharmaceuticals Announces Completion of a $2.9 Million Private Placement and Company Presentations at Upcoming Industry Conferences in Geneva, Switzerland and Naples, Florida

... CHARLOTTESVILLE, Va., Feb. 6 /PRNewswire/ -- diffusion Pharmaceuticals LLC, a clinical-stage drug develop...ion, David G. Kalergis, Chief Executive Officer of diffusion Pharmaceuticals, will be presenting at two industr...com/cgi-bin/prnh/20090206/PH67853 ) To date, diffusion Pharmaceuticals has raised $13.1 million in privat...

DiFUSION Technologies Completes Successful Testing of Antimicrobial Spinal Implant

...of 4 weeks. Unlike other devices on the market, DiFUSION's CleanFUZE(TM) will be capable of releasing its dosage amount over time and the rate of diffusion can be controlled by parts-per-billion. Additionally, rather than antimicrobial coatings currently used in devices, CleanFUZE(TM) contains antimicrob...

Diffusion in Biological Products

Mid Range Power Supply from Thermo Scientific

Description:...s been reached. A dual function 100 hour time is standard and can be set to automatically end a run. Users can set a holding voltage to prevent sample diffusion at the end of a run.The EC135-90 is backed by Thermo EC's premier 4 year warranty....
Company:Thermo Scientific

EC570-90 Power Supply from Thermo Scientific

Description:...automatically end a run and wil automatically accrue elapsed time when operated in the passive mode. Holding voltage can also be set to prevent sample diffusion prior to disassembly of the apparatus. The EC570-90 is backed by Thermo EC's premier 4 year warranty....
Company:Thermo Scientific

Diffusion in Biological Definition

Diffusion

This article is about the physical mechanism of diffusion. For alternative meanings, see diffusion (disambiguation) . Diffusion is the spontaneous spreading of something such as particles , heat , or momentum . The phenomenon is readily observed when a drop of colored water is added t...

Facilitated diffusion

Facilitated diffusion ( facilitated transport ) is a process of passive transport ( diffusion ) via which molecules diffuse across membranes , with the help of transport proteins ( mediated transport ). Small uncharged molecules can easily diffuse across cell membranes. However, due t...

Fick's law of diffusion

Fick's laws of diffusion describe diffusion . Contents showTocToggle("show","hide") 1 History 2 Fick's First Law 3 Fick's Second Law 4 A Biological Perspective 5 See also 6 References History Fick's laws of diffusion were derived by Adolf Fi...

Active transport

...port energy is directly coupled to movement of desired substance across a membrane, independent of any other species. Secondary transport concerns the diffusion of one species across a membrane to drive the transport of another. Primary Primary active transport directly uses energy to transport molecu...

ATP synthase

... to be composed 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 f...

Cartilage

...lage ring, causing tissue to herniate into the spinal canal . The matrix of cartilage acts as a barrier, preventing the entry of lymphocytes or diffusion of immunoglobins . This property allows for the transplantation of cartilage from one individual to another without fear of tissue rejection. Bi...

Diffusion in Biological Dictionary

Diffusion

Molecular diffusion , often called simply diffusion , is a net transport of molecules from a region of higher concentration to one of lower concentration by random molecular motion. The result of diffusion is a gradual mixing... Diffusion MRI is a magnetic resonance imaging (MRI) method th...

Facilitated diffusion

Facilitated diffusion is a process of diffusion , a form of passive transport facilitated by transport proteins. Facilitated diffusion is the spontaneous passage of molecules or ions across a biological membrane passing through specific transmembrane transport proteins.... Facilita...

Plasma membrane

...on-polar ... Plasma membranes have nearly one cholesterol per phospholipid molecule. ... Content : - Plasma membrane - LDL, HDL - Simple diffusion - Passive mediated ... The plasma membrane is assymetric with respect to the lipid distribution. ... Plasma membranes also contain prot...

Passive transport

...ive transport or passive transport to ... diffusion is the tendency of molecules to spread into an available space. The diffusion of substances across a membrane is called passiv...and ... Passive Transport ... Passive ... diffusion is a means of passive transport . ... Channel ...

Osmosis

... Osmosis is the diffusion of water through a semi-permeable membrane, from a low concentrate solutio... up a solute concentration gradient. The simplest definition is that it is diffusion of... Reverse osmosis is a filtration process that is often used for ...

Osmoregulation

...ance: The work required for osmoregulation depends on properties of the ... Osmoregulation : Please give me a drink! by J. Charles Delbeek M.Sc. diffusion is defined as the movement of a substance from an area of high ... Definition and other additional information on Osmoregulation from Biology-Onl...