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Topic: Fixation


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In the News (Sat 20 Jul 19)

  
  eMedicine - Arytenoid Fixation : Article by Robert A Buckmire, MD
For example, in joint fixation resulting from traumatic fracture or dislocation of the CA joint, expedient relocation of the displaced arytenoid appears to be the procedure of choice, similar to the treatment choice for a dislocated knee or shoulder.
Concurrent external lateral fixation is then affected by passing 2 needles through the thyroid lamina to create a suture loop around the vocal fold under direct vision of the endoscopist.
In CA fixation, the magnitude of posterior glottic enlargement with cordotomy is entirely independent of arytenoid position and mobility, unlike with the techniques designed to achieve vocal-fold lateralization.
www.emedicine.com /ent/topic609.htm   (2831 words)

  
  OCULAR FIXATION
The diagnosis of impaired fixation suppression is made by observing the effect of asking the subject to fix his eyes upon a clearly visible target, upon any ongoing nystagmus.The most commonly used test procedure is one described by Albert (1974).
The fixation index is the ratio of nystagmus peak slow-phase velocity with fixation to nystagmus intensity with fixation removed (e.g.
Fixation suppression can also be easily calculate from rotatory chair tests by having the subject track a chair fixed laser projected on a wall.
www.dizziness-and-balance.com /practice/fixation.html   (525 words)

  
 The Cure of Defective Eyesight By Treatment Without Glasses - www.Central-Fixation.com
By central fixation is meant the ability of the eye to look directly at a point, and while doing so to see best with the centre of the fovea or the centre of the sight of the retina.
Before central fixation and normal vision can be obtained, it is necessary to stop the twitching of the eyelids and the movements of the eyeball that result from the strain of eccentric fixation.
Central fixation is obtained by eye training with the aid of the Snellen test card at twenty feet and by alternately practising central fixation with a dot or a fine point at twenty inches or nearer.
www.central-fixation.com /batesmed/radicalcure.htm   (7184 words)

  
  NationMaster - Encyclopedia: Nitrogen fixation   (Site not responding. Last check: )
Nitrogen fixation is performed naturally by a number of different prokaryotes, including bacteria, and actinobacteria certain types of anaerobic bacteria.
Biological nitrogen fixation was discovered by the Dutch microbiologist Martinus Beijerinck.
Although the basic nitrogen fixation process is the same with these plants as with legumes, most of their nitrogen contribution is in the form of falling leaves and decaying litter.
www.nationmaster.com /encyclopedia/Nitrogen-fixation   (2053 words)

  
 Better Eyesight : Central Fixation   (Site not responding. Last check: )
In most cases of eccentric fixation, on the contrary, the eye quickly tires and its appearance, with that of the face, is expressive of effort or strain.
Eccentric fixation is a symptom of strain and is relieved by any method that relieves strain, but in some cases a person is relieved just as soon as he is able to demonstrate the facts of central fixation.
The highest degrees of eccentric fixation occur in the high degrees of myopia, and in these cases, since the sight is best at the near-point, a person is benefited by practicing seeing worse at this point.
www.indiangyan.com /books/healthbooks/better_eyesight/central_fixation.shtml   (2428 words)

  
 Symbiotic Nitrogen Fixation   (Site not responding. Last check: )
The direct availability of the fixed N to the host allows it to grow in environments that are low in N, and at the same time to cut losses from denitrification, volatilization and leaching, improving the sustainability of both agricultural and natural systems that involve such symbioses.
The world’s population is projected to increase to 8.3 billion by 2025 (Mannion, 1998), with over 90% of that increase in developing countries.
The contrast is evident in data presented by Van Kessel and Hartley (2000) and Andrade and Hungria (2001).
www.soils.agri.umn.edu /academics/classes/soil3612/Symbiotic_Nitrogen_Fixation/Introduction.htm   (405 words)

  
 FIXATION - Official Band Website - Home
Fixation have a new drummer, his name is Geoff.
Fixation came first place gaining them a spot in Round 2 being held in 2 weeks- Wednesday, August 29th at The Agincourt Hotel, Fixation went home with $500 in prize money.
FIXATION will be taking 2 months off over March and April to record the long awaited EP- 'The Burning Silence'.
www.fixationsite.com   (1312 words)

  
 Biological Nitrogen Fixation
Nitrogen fixation rates from 75 to 300 kilograms of N per hectare per year (70 to 275 pounds of N per acre per year) are common in various combinations.
Nitrogen fixation is characteristically higher in environments such as tropical soils, where such factors as substrate availability, temperature and moisture are more favorable to the maintenance and activity of a high bacterial population.
Torrey, J.G. "Nitrogen fixation by actinomycete-nodulated angiosperms." Bioscience 28(9):586-592.
edis.ifas.ufl.edu /SS180   (2181 words)

  
 Genetic Drift
Where allele frequencies are asymmetrical, the chance of fixation for the common allele is higher than that for the rare allele.
The x axis is the initial allele frequency, ranging from 0 to 1.0 When p =.5 (the middle of the curve) average time to fixation or loss is the highest, and it is 2.8 N generations.
Finally, you can show this "time to fixation" in another way by graphing the distribution of population allele frequencies after various times, where different graphs show the trajectories of a set of populations with different initial allele frequencies.
www.wooster.edu /biology/mloveless/Drift.html   (849 words)

  
 Nitrogen fixation Summary
fixation contributes the equivalent of 2.5 million tons of fertilizer nitrogen annually to agricultural production and is essential to a country with limited natural gas reserves for fertilizer nitrogen production.
fixation is either pink or red in color due to the presence of hemoglobin needed for oxygen transport.
Nitrogen fixation is performed naturally by a number of different prokaryotes, including bacteria, and actinobacteria certain types of anaerobic bacteria.
www.bookrags.com /Nitrogen_fixation   (2852 words)

  
 FIXATION and FIXATIVES © Woods and Ellis 2000
Fixation is, therefore, the first step and the foundation in a sequence of events that culminates in the final examination of a tissue section.
The living cell is fluid or in a semi-fluid state, whereas fixation produces coagulation of tissue proteins and constituents, a necessary event to prevent their loss or diffusion during tissue processing; the passage through hypertonic and hypotonic solutions during tissue processing would otherwise disrupt the cells.
The use of heat for fixation in microbiology and for blood films is well known and the heating of formalin to temperatures of 60-70°C can be used for the rapid fixation of very urgent biopsy specimens, although the risk of tissue distortion is increased.
home.primus.com.au /royellis/fix.htm   (9964 words)

  
 Degenerative Changes Following Spinal Fixation in a Small Animal Model
The horizontal linking bars used to create fixation were attached to the vertical bars by means of a bolt coursing through a hole in each vertical bar that was approximately 10 mm posterior to the spinous process (2 mm from the distal tip of the vertical bar).
One reason for the lack of difference between control and fixation groups in these earlier time frames can be attributed to a relative reduction of degenerative findings in the subgroups of animals that had the fixation devices removed for varying periods.
A direct relationship was found between duration of fixation and development of degenerative changes in the Z joints in the FNR animals (with 2 exceptions in the single 8-week fixation animal).
www.chiro.org /research/ABSTRACTS/Degenerative_Changes_Following_Spinal_Fixation.shtml   (1548 words)

  
 Intermaxillary Fixation and Rigid Fixation - New York Presbyterian Hospital
Intermaxillary fixation and rigid fixation are two methods of fixation, a procedure for stabilizing broken bones and allowing them to grow together in the proper position.
The other, called rigid fixation, is a newer technique in which tiny screws or plates are attached directly onto the fractured sections of the jaw bone; it does not require physically binding the jaws shut.
Rigid fixation is becoming the preferred fixation technique when possible, because it is so much less disruptive to a patient's quality of life during recovery.
www.nyp.org /health/intermaxillary-rigid-fixation.html   (431 words)

  
 What is specimen fixation?
Fixation using formaldehyde is a chemical process during which the proteins in the specimen are cross-linked.
Fixation prevents the breakdown of tissues resulting from the release of enzymes after tissue death (autolysis).
Formaldehyde fixation involves immersing the specimen in 10% formaldehyde for several days up to weeks depending upon the size of the fish.
www.amonline.net.au /fishes/faq/fixation.htm   (326 words)

  
 Fixation 2.x Home Page
Fixation is a chess client for the Internet Chess Club (ICC), Free Internet Chess Server (FICS), US Chess Live (USCL) and chess.net (limited support).
Fixation only runs on Macintosh computers -- there are no plans to port Fixation to any other platform.
Fixation 2.x was derived from version 1.x, which was developed by Adam Miller.
cknelsen.sasktelwebsite.net /fixation/Fixation_title.html   (573 words)

  
 Fixation
Fixation should proceed for at least 30 minutes, but specimens can be stored in fixative for several years without damage.
After fixation gregarines may be stored in alcohol or stained and processed as permanent mounts.
After fixation, transfer by graded series to 70% EtOH and continue repeated, gentle fluid changes until picric acid and cupric acetate are removed.
science.peru.edu /gregarina/html/fixation.html   (875 words)

  
 Nitrogen Fixation   (Site not responding. Last check: )
fixation could only be detected by measuring the growth of organisms on media low or devoid in nitrogen.
fixation, first employed around 1941, is now the standard other methods must match.
Thus, it is routinely assumed that the conversion rate between acetylene reduction and nitrogen fixation is 3:1.
www.soils.agri.umn.edu /academics/classes/soil3612/Nitrogen_Fixation/Measurement.htm   (646 words)

  
 AEC Client Education Library - Upward Pateller Fixation
Intermittent upward patellar fixation is a condition whereby the horse’s pelvic limb temporarily "locks" in extension.
Therefore, it is important to assess the horse as a whole prior to determining the cause for upward patellar fixation.
In subtle cases of upward patellar fixation where conformation is relatively good, increased exercise alone may result in resolution of the problem.
www.atlantaequine.com /pages/client_lib_UpPatellerFix.html   (2318 words)

  
 Nitrogen Fixation by Legumes
Within these nodules, nitrogen fixation is done by the bacteria, and the NH produced is absorbed by the plant.
However, nitrogen fixation by legumes can be in the range of 25-75 pounds of nitrogen per acre per year in a natural ecosystem, and several hundred pounds in a cropping system.
In a new field, the poor fixation is often attributed to the lack of native Rhizobium to nodulate the legume, but the cause may also be poor plant nutrition or other plant stresses that inhibit nitrogen fixation.
www.csun.edu /~hcbio027/biotechnology/lec10/lindemann.html   (1628 words)

  
 Technical paper 2: Biological nitrogen fixation
Biological nitrogen fixation (BNF) is the process whereby atmospheric nitrogen (N=N) is reduced to ammonia in the presence of nitrogenase.
Biological nitrogen fixation is brought about bath by free-living soil microorganisms and by symbiotic associations of microorganisms with higher plants.
Biological nitrogen fixation is the process of capturing atmospheric nitrogen by biological processes.
www.fao.org /Wairdocs/ILRI/x5546E/x5546e05.htm   (3616 words)

  
 FIXATION
The subject of fixation and preservation is a major scientific topic in the methodology of microscopy and it deals with many aspects of the living state and the nature of the organisms to be fixed.
Another manner of fixation is so-called 'chemical fixation.' Depending on the physiological status of the cells/tissues to be fixed, numerous chemical fixatives were defined in the past centuries and the techniques are still being improved.
No fixation or staining has been performed prior to microscopy; it is therefore an in vivo study since the life processes of these organisms continue for a while until water evaporates and the material consequently dries.
www.microscopy-uk.org.uk /mag/artoct00/fixation.html   (1320 words)

  
 Fixation
Using this is not necessary to the operation of Fixation, and in fact probably not useful to those only connecting to one Chess server.
Something to remember: Fixation does not read from the server while you're dragging a piece, so don't be dragging a piece waiting for some sign.
Note: Fixations will always ask if you really want to quit if you're in the middle of a game, whether this option is selected or not.
www.adum.com /comp/fix.html   (1058 words)

  
 Carbon Fixation | World of Chemistry
Carbon fixation refers to the chemical transformation of simple, inorganic compounds of carbon into more complex forms of organic matter.
Usually, sunlight is the energy source for the fixation reactions, which is referred to as photosynthesis, and the organisms as photoautotrophs.
In addition to photosynthetic fixations of CO, inorganic forms of carbon can be fixed by other biotic reactions occurring in aquatic ecosystems.
www.bookrags.com /research/carbon-fixation-woc   (403 words)

  
 Orthopedic Hardware
A general classification of orthopedic fixation hardware is shown in the next table.
The prototypical spinal fixation device is the venerable Harrington rod.
The usual complications of this fixation system are loosening or infection (or both) of the pins.
www.rad.washington.edu /mskbook/orthopedichardware.html   (4533 words)

  
 External Fixation Overview   (Site not responding. Last check: )
Whenever possible, external fixation is the preferred treatment for fractures since internal fixation damages the soft tissues and can compromise blood flow to the injured site.
There are several methods of external fixation ranging from bracing and casting to placement of pins through bones distant from the fracture which are attached to external fixators.
Planar fixation is performed by passing pins through one (unilateral) or both (bilateral) sides of a bone and connecting the pins to clamps and rods.
www.med.wayne.edu /diagRadiology/RSNA2003/external_fixation_Overview.htm   (253 words)

  
 fixation
Fixation is one of the most critical aspects of histology, because it determines a large extent which tissue components you will be able to detect.
We invariably find that one-fixation method is preferable to the others for detection of a given antigen in a given tissue.
In order to work with tissues for histology the tissues must be processed to a workable and preserved state.
www.ndsu.nodak.edu /ndsu/lreynold/fixation.htm   (281 words)

  
 Lumbar lordosis versus the AS ilium fixation
The bilateral AS ilium fixation is the most commonly encountered pattern for the hyperlordotic lumbar spine, especially with an overlay of emotional tension.
The other important and common contributor to the AS ilium fixation patterns is the L-5 rotation pattern, followed less frequently by the L-4 rotation pattern.
A common finding with the symptomatic hyperlordotic lumbar curve with bilateral AS fixations and L-5 rotation is as follows: An attempt to adjust L-5 is unsuccessful or the setup is uncomfortable to the doctor.
www.chiroweb.com /archives/18/05/04.html   (1109 words)

  
 Fixation by N.C. Anderson
fixation is an example of what readers should demand of e-books--great storytelling, fine editing and some of the best work in the genre.
FIXATION is an intriguing romantic suspense that centers on how easily a fatal attraction can destroy an innocent individual.
FIXATION, an exciting new suspense thriller from NanC Anderson, is a page-turner, or should I say "screen-turner," that will have you hunched over the monitor reading late into the night, as Grady Bowman, a local rancher, finds himself drawn to the attractive, but terrified, Jessica.
nancanderson.romance-central.com /fixation.html   (812 words)

  
 Chess Sets for Fixation for Macintosh
Fixation is a free program for Macintosh users that provides an easy-to-use graphical interface for the popular ICC and FICS online chess servers.
Fixation 1.41 by Adam Miller or the more recent Fixation 2.0 by Craig Knelsen.
Fixation is free, but its creators Adam Miller and Craig Knelsen ask that you not distribute your altered version to others without their permission.
world.std.com /~wij/fixation/chess-sets.html   (847 words)

  
 Fixation - D I G I T A L - S A L E S
Fixation offer a "While-you-wait" sensor-cleaning service on all Nikon and most Canon Professional SLR cameras.
When you ask Fixation to clean your camera sensor, our technicians first of all take a test image on one of our own compact flash cards to establish what level of dust/dirt/smearing is present and where it is located.
Fixation accepts no responsibility for customers damaging their sensor by cleaning it with the products we have supplied, or the suggestions we make to help you.
www.fixationuk.com /digital.htm   (773 words)

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