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filament in Medical News

Premiere Fibers Unveils New Logo, Names for Innovative Brands

...arket segments. About Premiere Fibers, Inc.: Premiere Fibers, Inc. manufactures and markets nylon, polyester as well as other melt spinnable filament yarns to the military, industrial technical, medical, activewear, specialty apparel and hosiery market segments among others. The company was founded ...

Preventing a second stroke is focus of study at Rush University Medical Center

...surgeon at Rush, was the first physician in Illinois to use the Wingspan stent. The catheterization procedure involves carefully threading a hair-like filament from a tiny incision on the inside of the thigh through the body's arteries and veins up to the patient's brain. After reaching the site of the blocka...

From mother to daughters: A central mystery in cell division solved

...s accomplished by the contractile ring, which is assembled from two protein filament types, actin and myosin, that are also used in muscle. During cell divisi...hese long filaments, preventing them from being efficient tracks for myosin filament movement." "This discovery will open the door to further studies of ce...

Green Tea Antioxidant May Help Prevent Alzheimer's

...rotein aggregates implicated in causing disease," Cole said. One novel aspect of the study is the authors' demonstration that EGCG prevents toxic filament formation by redirecting the aggregating proteins to make non-toxic proteins, Cole said. "This is surprising, because similar protein aggregate sp...

MicroRNAs, EMT and cancer progression

...aracterized by a decreased expression of the cell adhesion molecule and epithelial marker, E-cadherin, and an increased expression of the intermediate filament protein and mesenchymal cell marker, Vimentin. EMT is a normal embryological process, but it is implicated in various adult pathologies including c...

Controversial theory of Alzheimer's origin funded

...he same size. Next, the spheres join together in linear chains like beads on a string. In the third stage the beads merge together to form a uniform filament identical to those found in the brains of patients with the disease. Advocates of Xus theory are numerous. Daniel Woodard, KSC physician, was the f...

The structural basis of familial hypertrophic cardiomyopathy is revealed

... this point mutation severely disrupts actin-myosin interactions as compared to those in wildtype myosin. While myosin normally attaches to the actin filament at a fixed angle, the mutated myosin displayed a wide variety of angles at the attachment sites, thus demonstrating a structural basis for the change ...

Bak Protein Sets Stressed Cells on Suicide Path

...cancer, a protein called Bak just may set it up for suicide, researchers have found. In a deadly double whammy, Bak helps chop the finger-like filament shape of the cell's powerhouse, or mitochondrion, into vulnerable little spheres. Another protein Bax then pokes countless holes in those spheres, s...

A New Focus For The Mechanism Of Nerve Growth

...vance depends on the coordinated assembly of actin filament networks. This study implicates the molecular mo...croscopy, or FSM, that let them directly see actin filament assembly, disassembly and movement in living cells...y role in growth cone guidance -- suggesting actin filament recycling and signaling may be intimately related....

Mini motor for micromedical applications

...uch a small motor, would be on the end of an endoscope. A mirror could be controlled by the motor to allow the light delivered by the fibre optic filament to illuminate a larger area of the upper digestive tract and physicians to view larger areas. “Also, because these motors are not electromagnetic, but...
filament in Medical Products

Centralis Direct®

Description:... Utilizing a unique solid methyl methacrylate optic with a bonded protective glass LaserWindow™ exterior, this special optical design eliminates filament reflection common to other lower profile fundus lenses. Available in Volk's exclusive ANF+ (Advanced No Fluid) contact design for methylcellulose free...
Company:Volk Optical, Inc.

Welch Allyn Prestige Coaxial-plus Ophthalmoscope (Head Only)

Features:... The Coaxial-plus Optical System enables easy entry into undilated pupils through precise lamp filament and optical alignment. The neutral filter provides the ideal amount of Halogen HPX light for entering healthy eyes without unwanted reflex. Th...
Company:Welch Allyn Medical Products
filament in Biological News

Building memories with actin

...with adenosine, a naturally occurring signal that squelches LTP. Adenosine prevents phosphorylation and inactivation of cofilin, an inhibitor of actin filament assembly, the team found. Cofilin's involvement, in turn, implicates signaling cascades headed by GTPases, such as the RhoA-ROCK and Rac-PAK pathways....

Muscle atrophy through thick but not thin

...d that MuRF1 targets the thick filament, demolishing various components in a specific order. The researchers hypothesize that removal of certain thick filament components first permits subsequent MuRF1 access to the myosin heavy chain. However, MuRF1 doesn't exert the same power over the thin filament, which ...

Study may aid efforts to prevent uncontrolled cell division in cancer

... by successive rounds of cell division. The division of one cell into two is accomplished by the contractile ring, which is assembled from two protein filament types also used in muscle. During cell division, the genome is replicated and the two copies are separated to opposite sides of the cell. A contrac...

Cheap and efficient white light LEDs new design described in AIP's Journal of Applied Physics

...entally friendly and much more efficient than other types of light bulbs. Incandescent bulbs produce light by sending electricity through a thin metal filament that glows red hot. Only about five percent of the energy is turned into light, however. The rest is wasted as heat. Compact fluorescent bulbs, which ...

MIT: Novel needle could cut medical complications

...ed from the oil industry. It involves a hollow S-shaped needle containing a filament that acts as a guide wire. When a physician pushes the device against a tis...e to the combined buckling and interactions with the walls of the tube, the filament locks into place "and the needle and wire advance as a single unit," said J...

A budding role for a cellular dynamo

...oundbreaking new study in the current issue of Developmental Cell , Brandeis researchers raise the curtain on how this actin maintains just the right filament length to keep the cell healthy and happily dividing. Using baker's yeast as the model organism, Brandeis researchers Melissa Chesarone, Christophe...

Human DNA repair process recorded in action

...to action whenever it occurs. Rad51 takes a leading role in the action. Always on call in the cell, molecules of the protein assemble into a long filament along a damaged or broken segment of DNA, where they help stretch out the coiled strands and align them with corresponding segments on the cell's seco...

Lamin A/C deficiency is 'unnerving'

... Mutations in the nuclear intermediate filament lamin A/C (LMNA) gene are associated with Emery-Dreifuss muscular dystrophy, but cause the disease by unknown mechanisms. Mjat et al. show that one me...

University of Arizona scientist shares in discovery of microbe filaments' power

...ilaments to pull is one of the strongest nanomotors known in biology, So said. In previous studies, the same group of investigators measured single filament retraction forces in the 50 to 100 picoNewton range. This force allows the bacterium to move an object 10,000 times its own body weight. Retraction fo...

Media highlights in the Dec. 15 issue of Biophysical Journal

...chanism is still not fully revealed because of its complex nature involving binding of both Ca2+ and myosin (a linear force-generating motor) to actin filament (the track protein). In this work the authors approached the mechanism of regulation by myosin molecules from a new angle. The idea was to test the ef...
filament in Biological Technology

Laser technology creates new forms of metal and enhances aircraft performance

...pe of the nano-structures -- and thus what colors of light those structures absorb and radiate -- to change the amount of each wavelength of light the filament radiates. In addition to this research, Guo and his team have been working on creating technology that may enable the Air Force to create an addit...

Regular light bulbs made super-efficient with ultra-fast laser

...out to study the reverse processthat the blackened filament would radiate light more effectively as well. "...he amount of each wavelength of light the tungsten filament radiates. Though Guo cannot yet make a simple bulb...e light. Guo's team has even been able to make a filament radiate partially polarized light, which until now...

New Flexible Vacuum Controller from Varian, Inc. is Expandable and Easy to Use

...of pressure, the XGS-600 can operate, display and process readings from hot filament and cold cathode high vacuum gauges (including UHV), as well as convection ...imultaneously operate up to twelve convection type gauges or up to four hot filament or cold cathode gauges combined with four convection gauges in one unit. ...

Heavier hydrogen on the atomic scale reduces friction

...loped a system for depositing diamond thin films. The technique, called hot filament chemical vapor deposition, involves the heating of a tungsten filament (like those found in incandescent light bulbs) to over 2000 degrees Celsius...

Sol-gel inks produce complex shapes with nanoscale features

...-dimensional structures, the researchers use a robotic deposition process called direct-write assembly. The concentrated sol-gel ink is dispensed as a filament from a nozzle approximately 1 micron in diameter (about 100 times smaller than a human hair). The ink is dispensed while a computer-controlled micropo...

A new wide field-of-view confocal imaging system and its applications in drug discovery and pathology

...sorption of the illumination light by structures in the specimen. In a conventional widefield microscope, the commonly used light sources are tungsten filament lamps with a continuum of blackbody radiation, or xenon arc lamps with a continuum between 300 and 800 nm. 21 However, in the brightfield detection m...

Transfection of Green Fluorescent Protein into Human Adrenalcarcinoma Cells

...ntains vimentin intermediate filaments. A subclone derived from this cell line lacks vimentin expression and is thought to contain no intermediate filament network. 1 Although we have previously had success using this cell line for transfection studies using calcium phosphate, 2,3 two recent observa...
filament in Biological Definition

Intermediate filament

Intermediate filaments are one component of the cytoskeleton - important structural components of living cells. Their size is intermediate between that of microfilaments and microtubules . They are assembled from several different proteins . IFs crisscross the cytosol from the nuclear e...

Actin

...free to polymerize. Another important component in filament production is the Arp2/3 proteins , which serve a...e myosin head then releases after moving the actin filament in a relaxing or contracting movement by usage of ...the actin-bundling protein actinin separates each filament by 40 nm . This increase in distance allows the mo...

Cytoskeleton

...ryotic cells contain three kinds of cytoskeletal filaments. Actin Filaments Main article: microfilaments . Around 7 nm. in diameter, this filament is composed of two actin chains oriented in an helicoidal shape. They are mostly concentrated just beneath the plasma membrane, as they keep cellular ...

Ebola

...s in various shapes including a 'u', '6', a coil, or may be branched. The filaments are reported to be between 60-80 nm in diameter; the length of a filament associated with an individual viral particle is extremely variable, with Ebola particles of up to 14,000 nm in length being reported. An average lengt...

Flagellum

...ternal links Bacterial flagellum The filament is composed of the protein flagellin and is a ho...g is directly attached to the plasma membrane. The filament ends with a capping protein. The bacterial flag...f can operate at 6,000 to 17,000 rpm , but with a filament attached usually only reaches 200 to 1000 rpm. T...

Actin

...free to polymerize. Another important component in filament production is the Arp2/3 proteins , which serve a...e myosin head then releases after moving the actin filament in a relaxing or contracting movement by usage of ...the actin-bundling protein actinin separates each filament by 40 nm . This increase in distance allows the mo...

Myosin

... Myosin is a motor protein filament found in muscle tissue . Together with actin ... sarcomere , which is composed of three different filament systems, the thin filaments assembled by actin proteins, the thick filament system consisting of myosin as well as the ela...
filament in Biological Dictionary

Intermediate filament

Mitosis and intermediate -sized filaments in developing skeletal muscle" ... Nestin, a Type VI Intermediate Filament Protein J Biol Chem, Vol. 274, Issue 14, ... There are five different types of Intermediate filaments : ... Each intermediate filament monomer consists of...

Stamen

...ers based in San Francisco. stamen n. , pl. stamens or stamina . The pollen-producing reproductive organ of a flower, usually consisting of a filament and an anther Definition of stamen from the Merriam-Webster Online Dictionary with audio pronunciations, thesaurus, Word of the Day, and word gam...

Rhizoid

...olio highlights some of the work ... rhizoid ( ) n. A slender rootlike filament by which mosses, liverworts, and fern gametophytes attach to the substratum...ritannica online encyclopedia article on rhizoid (biology), a short, thin filament found in fungi and in certain plants and sponges that anchors the growing...

RecA protein

...cA protein ... E. coli RecA protein promotes homologous pairing in two ... In vitro, the purified RecA -RFP protein forms a nucleoprotein filament whose ... However, RecA protein is also a dATPase; dATP supports RecA -RFP nucleoprotein ... The RecA protein of Pseudomonas aeruginosa (R...

Primordium

.... The ovary primordium rises, and on the top of it two lateral and one abaxial ... Simultaneously, each stamen primordium develops into a filament and a basifixed ... ...

Oscillatoria

... in tangled mats, derives its name from its slow, rhythmic oscillating motion, which is thought to result from a secretion of mucilage that pushes the filament away from the direction of excretion. Reproduction is by... Violuric acid can be used to inhibit and/or prevent the growth of many ... Ankistrodesm...

Nerve chord

...ll article > ... www.filamentrecordings.co .uk ... Audio Archive > filament Recordings > Nerve Chord . Listen to audio. Stream (help) VBR M3U (Hi...ord - [fila0017] ... 07. Nerve Chord . 08. Braintrap. 09. Marshmermaid. filament Recordings ... ... include: Notochord replaced by spinal chord , intern...

Muscle contraction

...rtter Syndrome - tetany ... ... are the contractile units of the muscle and are organized into sarcomeres. ... This scene illustrates the sliding filament rationale for muscle contraction . ... A muscle contraction (also known as a muscle twitch or simply twitch) occurs ... Voluntary muscle ...

Heterocyst

...ir using the enzyme nitrogenase, in order to provide the cells in the filament with nitrogen for biosynthesis.... Aspects of the topic heterocyst are...cialized cell types to be aware of, the heterocyst and the akinete. ... filament (=trichome), sheath, heterocyst , akinete. Chlorophyta ... ...

Conjugation tube

...his tube a bud formed (Fig. (Fig.5).5 ) ... The cell contents of one filament pass through the conjugation tube and the nuclei fuse. ... Cells of each filament put out a conjugation tube ... directly into the centrifuge tube u...
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