Helical

New Custom Hybrid Planetary Gearbox Series from NMB

...rque and duty cycle applications can be provided. For low noise requirements, the standard spur gearing can be substituted with plastic and cut steel helical configurations. Additional value added options such as encoders, gearbox mounted pinions, gears and pulleys are part of the custom packages. T...

tw telecom Extends Portland Area Network Into Tualatin and Lake Oswego Business Districts

...comfortable as possible. Body Imaging Radiology services include: General X-Ray/Fluoroscopy, Digital Mammography, Short bore, High field MRI scanning, helical Multi-detector, high speed CT scanning, 3 dimensional reconstruction workstation, Therapeutic/Diagnostic Pain Management injections, Bone density scre...

Frost & Sullivan Lauds Pioneer Surgical Technology for Development of Tissue Scaffold E-Matrix

...ular weight carbohydrate, mimicking the open ECM structure of an early mesenchymal tissue. Single stranded molecules are produced by unraveling triple helical collagen structures and these are further stabilized by adding large carbohydrate molecules. The E-Matrix(TM) monomer contains exposed polar bind...

OrbusNeich Files Patent Infringement Lawsuit Against Boston Scientific

...ht, title, and interest in U.S. Patent No. 7,329,277 entitled "Stent Having helical Elements" and U.S. Patent No. 6,821,292 entitled "Crimpable Intraluminal Endoprosthesis Having helical Elements." In its complaint Orbus alleges, among other things, that BSC ha...

Impac Software Announces Clinical Release of RapidArc Support

...three-dimensional volume of a tumor with a single, continuous rotation of the treatment system's gantry. Volumetric modulated arc therapy differs from helical treatment techniques in that it delivers dose to the whole volume at once, making it fast as well as precise treatment. About Impac Software ...

Angled gantry technique reduced breast radiation exposure by 50 percent

...onary CT." Dr. Halpern and colleagues retrospectively reviewed 100 consecutive coronary CT angiography images that were obtained with a 64 detector helical scanner. They evaluated sagital images to: 1) define the position of the breasts and the gantry angulation required to perform a CT examination parall...

Helical in Medical Technology

First Skin Cancer Patients Treated With Electronic Brachytherapy (eBx) At University of Wisconsin Riverview Cancer Center

... of Wisconsin Carbone Cancer Center in Madison, WI. In November 2006 the Riverview center became the first in central Wisconsin to treat patients with helical tomotherapy, the most sophisticated and effective image-guided and intensity-modulated radiation therapy that exists today. For more information about...

Appendicitis: Evolving Tools to Diagnose a Classic Disease

...ndix is visible on the scan. With oral or rectal contrast (with or without intravenous contrast), sensitivity and specificity can both approach 98%. helical CT, which has finer resolution and shorter acquisition times, has improved test quality and made it more practical for patients who cannot remain stil...

Helical in Medical Products

Spira™ Helical Stone Basket

Description: Helical Stone Basket...
Company:Sacred Heart Medical

Paragon™ Nitinol Paired Helical Basket

Description: Nitinol Paired Helical Basket...
Company:Sacred Heart Medical

Hercules™ Stainless Steel Paired Helical Basket

Description: Stainless Steel Paired Helical Basket...
Company:Sacred Heart Medical

Captura® Helical Stone Extractor - with Unidex Handle

Description: Used for stone manipulation and removal in the urinary tract. Enhanced wire strength permits greater radial dilation in the ureter. The Unidex handle facilitates easy, ergonomic one-handed operation. Supplied sterile in peel-open packages. Intended for one-time use....
Company:Cook Incorporated

Captura® Helical Stone Extractor - RHR Replacement Stone Extractors

Description: Used for stone manipulation and removal in the urinary tract. Enhanced wire strength permits greater radial dilation in the ureter. The Unidex handle facilitates easy, ergonomic one-handed operation. Supplied sterile in peel-open packages. Intended for one-time use....
Company:Cook Incorporated

Ncircle® Nitinol Tipless Stone Extractor - Helical Basket with Unidex Handle

Description: Used for stone manipulation and removal in the urinary tract. The nitinol memory wire allows the basket to retain its shape following extreme torsion. The unique tipless design aids in calyceal stone capture by allowing the basket to open at the base of the calyx and encircle the stone. The tipless...
Company:Cook Urological

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Helical in Medical Definition

Full-body scan

...52777 . ^ Kashiwabara K, Kohshi S. (Sep 2006). "Outcome in patients with lung cancer invisible on chest roentgenograms but detected only by helical computed tomography.". Respirology 11 (5): 592-597. PMID 16916332 . ^ Pickhardt PJ, Choi JR, Hwang I, Butler JA, Puckett ML, Hildebran...

Helical in Medical Dictionary

Pleural fluid analysis

...ty M.D ... Pancreatitis - usually left sided, pleural fluid amylase: serum amylase > 1.0; ... Pleural fluid analysis . Sometimes helical CT or other tests ... Pleural fluid analysis is done to diagnose the cause of pleural effusion. ... What is thoracentesis and pleural...

Keratin

...or making things like hair. ... ,biological,biology definition,biology terminology,biology terms,biology abbreviations ... Keratin molecules are helical and fibrous, twisting around each ... Podiatrist-recommended NonyX Nail Gel clears out discoloring keratin debris under the nail. <p>Nail ...

Helicobacter pylori

... ... See also: Timeline of peptic ulcer disease and Helicobacter pylori ... Helicobacter pylori is a Gram-negative organism that has a helical or spiral ... 1. Blaser Martin J. "Ecology of Helicobacter pylori in the Human Stomach" J. Clin. ... Helicobacter pylori (H. pylori ) is ...

Borrelia

...own species, 12 of which are Lyme related, and an unknown number of genomic strains. Borrelia ... borrelia n. Any of various irregularly coiled helical spirochetes of the genus Borrelia , some species of which cause relapsing fever in humans, Borrelia Borrelia Scientific classification King...

Helical in Biological News

Caltech scientists show function of helical band in heart

PASADENA, Calif.--Scientists from the California Institute of Technology (Caltech) have created images of the heart's muscular layer that show, for the first time, the connection between the configuration of those muscles and the way the human heart contracts. More precisely, they showed that t...

UC San Diego engineer provides insights to decades-old DNA squabble

...ally a combination of both of these models. Some researchers suggest that its structure is like a solenoid, where the chain of nucleosomes follows a helical path along the chromatin axis such that adjacent nucleosomes along the chain lie side by side on the chromatin fiber also and thus the linker DNA conn...

What scientists know about jewel beetle shimmer

...ells form similar to a certain kind of liquid crystal called a 'cholesteric' liquid crystal whose free surface has cone-like structures and that has a helical arrangement of molecules. Research suggests the cells come from spontaneous arrangement of glucose-like particles called chitin molecules that form a...

'Disordered' amino acids may really be there to provide wiggle room for signaling protein

... a pathway. Oddly, researchers have noted that the ezrin-binding motif conveniently fits into a cleft on the surface of the PDZ domains, but assumes a helical structure, which is highly unusual for this class of proteins. As is typical for human proteins, over one third of the amino acids that make up NH...

Covering the bases: Quantum effect may hold promise for low-cost DNA sequencing, sensor applications

... used to determine the identities of the four nucleotide basesadenine, thymine, cytosine and guaninewhich make up the ladder rungs of the DNA's double helical structure. Most of these require snipping DNA into hundreds of thousands of short fragments, unzipping the helix and reading a few hundred to a few th...

UConn chemists find secret to increasing luminescence efficiency of carbon nanotubes

...rch that Papadimitrakopoulos and Sang-Yong Ju began wrapping nanotubes with helical assemblies and probing their luminescence properties. The more luminesce...e applications are possible due to the nanotube's flavin-based (vitamin B2) helical wrapping. ...

Helical in Biological Technology

Researchers control the assembly of nanobristles into helical clusters

CAMBRIDGE, Mass. January 8, 2008 From the structure of DNA to nautical rope to distant spiral galaxies, helical forms are as abundant as they are useful in nature and manufacturing alike. Researchers at the Harvard School of Engineering and Applied Sciences (SEAS) have discovered a way to synthe...

Scientists determine the structure of highly efficient light-harvesting molecules in green bacteria

...les all lined up," he said. The NMR results also enabled the scientists to determine that the chlorophyll molecules in green bacteria are arranged in helical spirals. In the mutant bacteria, the chlorophyll molecules are positioned at a nearly 90-degree angle in relation to the long axis of the nanotubes, ...

Pizza tossing art unlocks secrets of tiny motors

...res the art of pizza tossing. "In brief, if you toss a pizza dough one toss at a time that is, if you toss then catch your hands should move in a helical fashion, like they are moving along a spiral, a curved line laid along a cylinder," Associate Professor Friend said. "If you are tossing the pizza...

Varian Medical Systems to Exhibit X-ray and CT Technologies for Non-Destructive Testing at the Upcoming ASNT 18th Annual Spring Conference

...at the conference including: A new computed tomography system, the BIR 500-450/225, capable of operating in volumetric (cone-beam) CT, helical volume CT, and real-time radiographic imaging modes. This system offers high-speed distributed reconstruction, providing dramatically improved image ...

Leading Middle East Cancer Hospital Acquires Advanced Radiotherapy Capability from Varian Medical Systems

...enter in the world. In keeping with this mandate, we evaluated offerings from all three major vendors, as well as other arc therapy techniques such as helical tomotherapy, and decided that Varian had the most advanced systems and the most clinically integrated system to meet our needs." "Varian's equi...

Elekta Announces First Two Clinical Sites Using VMAT Cancer Treatment Capability

...o existing advanced radiation therapy techniques, often referred to as IMRT (Intensity Modulated Radiation Therapy) and offers a faster alternative to helical tomotherapy. With Elekta's VMAT technology, the target continuously is radiated while the source of the beam is rotated around the patient in single o...

Helical in Biological Definition

Alpha helix

...amino acids in an α helix are arranged in a helical structure, about 5 wide. Each amino acid resul... and corresponds to a translation of 1.5 along the helical axis. The helix is tightly packed; there is almost...ypeptides usually are not able to adopt the alpha helical structure, since the entropic cost associated wi...

Bacterium

...spirochaetes , have structures similar to flagella, called axial filaments , between two membranes in the periplasmic space. They have a distinctive helical body that twists about as it moves. Bacterial flagella are arranged in many different ways. Bacteria can have a single polar flagellum at one end o...

Collagen

...oiling of each of the alpha chain subunits of tropocollagen, where there is a rise per turn of just 0.3 nm as opposed to the .36 nm of a regular Alpha helical coil. Hydroxylysine and hydroxyproline play important roles in the stabilisation of the tropocollagen globular structure as well as the final fibre sh...

Computed axial tomography

...ged, is slowly and smoothly slid through the X-ray circle. These are called helical or spiral CT machines. Their computer systems integrate the data of the mov..., and requires accurately timed rapid injections of contrast and high-speed helical scanners. CT is the standard method of evaluating abnormalities seen on che...

Cytoskeleton

... MreB , are involved in the maintenance of cell shape. All non-spherical bacteria have genes encoding actin-like proteins, and these proteins form a helical network beneath the cell membrane that guides the proteins involved in cell wall biosynthesis . Some plasmids encode a partitioning system that i...

DNA

...Table of comparison of the properties of different helical forms 6.5 Non-helical forms 7 Dire...ructure of DNA 9.3.1 Discovery that DNA is helical 9.3.2 Discovery that complementary nucleotides ...se pairing causes the nucleotide bases to face the helical axis, the sugar and phosphate groups of the nucleo...

Helical in Biological Dictionary

Z-DNA

... Z - DNA is one of the many possible double helical structures of DNA . It is a left-handed double helical structure in which the double helix winds to the left in a zig-zag patter...

Supercoil

... In a "relaxed" double-helical segment of DNA, the two strands twist around the helical axis once every 10.4-10.5 base pairs of sequence. Adding or subtracting twists, as some enzymes can do, imposes strain. If a DNA segment... Su...

Spirochetes

...usually only a fraction of a micron ... Spirochetes are gram negative, helical bacteria possessing an internal flagellum ... All spirochetes divide ...Page ... Spirochetes are Gram negative bacteria that are long, thin, helical and motile. ... It is extremely difficult to detect spirochetes in tertia...

Replication fork

...teins at the replication fork address each of these problems. ... As the replication fork moves on, leading and lagging strands twist. into helical forms. ... DNA Replication Fork . Roll over for. more info " ... for bacterial replication forks , see references 135 and 220; ... RFBs, for ...

Relaxed DNA

... " double-helical segment of DNA , the two strands twist around the helical axis once every 10.4-10.5 base pairs of sequence. Adding or subtracting t.... ... Relaxed DNA is in the "B" configuration, with 10 base pairs per helical turn. ... DNA in its relaxed (ideal) state usually assumes the B con...

Pseudoknot

...... BWYV pseudoknot structure as ... type RNA pseudoknot , optimally positioned six to eight ... pairing, and potential stacking of pseudoknot helical stems, ... BWYV pseudoknot reveals significant ... RNA pseudoknot structure is defined as a ... A simple pseudoknot is composed of two helix ....