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Related to atactic: syndiotactic polymer


pertaining to or characterized by ataxia; marked by incoordination or irregularity.




(a-tak'se-a, a?) [Gr. ataxia, lack of order]
Defective muscular coordination, esp. that manifested when voluntary muscular movements are attempted. atacticataxic (a-tak'tik, a?) (a-tak'sik, a?), adjective

alcoholic ataxia

In chronic alcoholism, ataxia due to a loss of proprioception.

bulbar ataxia

Ataxia due to a lesion in the medulla oblongata or pons.

cerebellar ataxia

Ataxia due to cerebellar disease.

choreic ataxia

Ataxia in patients with chorea.

Friedreich ataxia

See: Friedreich, Nikolaus

hysterical ataxia

Ataxia of leg muscles due to somatoform disorders.

limb ataxia

Inability to make smooth, coordinated movements of an arm or a leg, as when trying to touch an examiner's finger with an index finger or when trying to run one's right or left heel straight down the opposite shin. Limb ataxia is present when a limb that has no deficits in strength wobbles during movement or misses its target.

locomotor ataxia

Tabes dorsalis.

Marie ataxia

See: Marie, Pierre Marie

motor ataxia

Inability to perform coordinated muscle movements.

optic ataxia

Loss of hand-eye coordination in reaching for an object one has seen, due to damage to visually dedicated regions of the cerebral cortex.

sensory ataxia

Ataxia due to interference in conduction of sensory responses, esp. proprioceptive impulses from muscles. The condition becomes aggravated when the eyes are closed.
See: Romberg sign; spinal ataxia

spinal ataxia

Ataxia due to spinal cord disease.

static ataxia

Loss of deep sensibility, causing inability to preserve equilibrium in standing.


pertaining to or characterized by ataxia; marked by incoordination or irregularity.
References in periodicals archive ?
The DMA and dynamic thermal results discussed at present work, let conclude the efficiency of an atactic polypropylene with a high succinic anhydride grafting level as an effective interfacial modifier in iPP/SCF composites.
The material is modified with a modifier selected from a group including: Atactic PolyPropylene (APP), Amorphous Poly Alpha Oletin (APOA), Thermoplastic PolyOlefin (TPO), Styrene-Butadiene-Styrene (SBS), Styrene-Ethylene-Butadiene-Styrene (SEBS) and synthetic rubber.
Backbone chemical structure Three structural factors affect the value of Tg in atactic polymers.
Neither material contains low-molecular-weight atactic fractions, making them suitable for pharmaceutical and food applications.
Tenders are invited for Roof Treatment At The C Type Qtrs Nivh With Atactic Polypropylene Polymer Membrane 3 Mm And Parks Scooter Shed And Drain At Nivh Rajpur Road Dehradun
These D-lactides are statistically spread in the chain and are responsible for the atactic stereo regularity.
Modified bitumen, which is an asphalt modified with either Styrene-Butadiene-Styrene (SBS) or Atactic Polypropylene (APP) and a polyester nonwoven mat has become the preferred roofing system over BUR, in both North America and Europe.
Aristech Chemical, Pittsburgh, PA, announced that effective July 1, BassTech Rosins, Englewood, NJ, will be the sole outlet for all of Aristech's atactic polypropylene, which is produced as a by-product at the company's La-Porte, TX facility.
Two primary modifiers are used today: atactic polypropylene- (APP-) and styrene butadiene styrene- (SBS-) modified products.
Amoco is still at the laboratory stage in development of elastomeric homopolymer PP (EHPP) that combines isotactic and atactic PP in the same polymer chain.
Previously, the conformation of a repeat unit of uniaxially oriented atactic PSt was assumed; angle y between the transition dipole moment vector of the out-of-plane vibration of the phenyl ring and the chain axis was determined [25] by plotting the orientation function of the main chain [f.
In the early 1980's the modified bitumen (MB) method came to North America; the system consists of asphalt modified with either Atactic Polypropylene (APP) or Styrene-Butadiene-Styrene (SBS) along with a polyester nonwoven mat substrate, which can be either spunbonded, needlepunched, fiberglass-based or a