TERMIUM Plus®

The Government of Canada’s terminology and linguistic data bank.

HOLLOW FIBER [7 records]

Record 1 2022-07-24

English

Subject field(s)
  • Synthetic Fabrics
DEF

A manufactured fiber with internal voids created by air injection or use of special spinnerets.

CONT

Hollow core fiber makes the filament yarn very light... This kind of fiber also ensures faster transportation of moisture away from the skin to the outer layer.

French

Domaine(s)
  • Textiles artificiels et synthétiques
DEF

Filament constitué d'un ou plusieurs canaux.

OBS

Les canaux rendent la fibre plus légère et plus isolante.

Spanish

Save record 1

Record 2 2013-11-25

English

Subject field(s)
  • Mathematics, Physics and Natural Sciences
  • Electronics and Informatics
  • Medicine and Health
  • Industries
DEF

A carbon nanotube composed of stacked truncated graphene nanocones.

CONT

Cup-stacked carbon nanotubes (CSCNTs) differ from other quasi-1D carbon structures, which normally behave as quasi-metallic conductors of electrons. CSCNTs exhibit semiconducting behaviors due to the stacking microstructure of graphene layers.

CONT

While carbon nanotubes(CNT) and carbon nanofibers(CNF) are both hollow, nanometer in scale, and produced in a similar manner, there are distinct differences which significantly impact their performance and ability to be processed. The primary differences between the materials are morphology, size, ease of processing, and price. Carbon nanofibers, also known as Stacked-Cup Carbon Nanotubes(SCCNT), have a unique morphology in that graphene planes are canted from the fiber axis, resulting in exposed edge planes on the interior and exterior surfaces of the fiber. CNTs, on the other hand, typically resemble an assembly of concentric cylinders of graphene. To illustrate the difference in morphology, Figure 1... shows a side by side comparison of A) multi-walled carbon nanotubes [MWCNT] and B) stacked-cup carbon nanotubes.... Figure 1. A) Multi-wall CNTs are composed of concentric cylinders of graphene where the basal planes form an inert surface. B) The stacked-cup structure of CNF has exposed graphitic edge planes along its length, providing opportunities for chemical modification of the surface for covalent bonding directly with the matrix.

OBS

This is completely different from single-wall or multiwall carbon nanotubes in structure. The open top and bottom edges of truncated graphene nanocones appear on the inner and outer surfaces of the nanotube, respectively.

OBS

cup-stack carbon nanotube; cup-stacked carbon nanotube: terms describing specific types of carbon nanofibres and nanoplates.

OBS

cup-stack carbon nanotube; cup-stacked carbon nanotube: terms and definition standardized by the International Organization for Standardization (ISO).

Key term(s)
  • cup-stacked carbon nanofibre
  • cup-stack carbon nanofibre
  • cup-stack carbon nanofiber
  • cup-stacked CNF
  • cup-stack CNF
  • CS-CNF
  • cupstacked carbon nanotube
  • cupstack carbon nanotube
  • cup-stacked CNT
  • cup-stack CNT
  • CS-CNT
  • cupstacked carbon nanofiber
  • cupstacked carbon nanofibre
  • cupstack carbon nanofiber
  • cupstack carbon nanofibre
  • stacked-cup carbon nanofibre

French

Domaine(s)
  • Mathématiques, physique et sciences naturelles
  • Électronique et informatique
  • Médecine et santé
  • Industries
DEF

Nanotube de carbone composé de nanocônes de graphène tronqués et empilés les uns dans les autres.

OBS

La structure de ce type de nanotube est complètement différente de celle de nanotubes de carbone simple paroi ou multi-parois. Les bords ouverts supérieur et inférieur des nanocônes de graphène tronqués apparaissent, respectivement, sur les surfaces intérieure et extérieure du nanotube.

OBS

nanotube de carbone de type «cup-stack» : terme décrivant des types spécifiques de nanofibres et nanofeuillets carbonés.

OBS

nanotube de carbone de type «cup-stack» : terme et définition normalisés par l'Organisation internationale de normalisation (ISO)

Key term(s)
  • nanotube de carbone de type «cupstack»

Spanish

Save record 2

Record 3 2011-06-07

English

Subject field(s)
  • Biological Sciences
  • Biotechnology
DEF

Thick-walled tubes about the diameter of a human hair. The tubes are made of a semipermeable material, such as cellulose, which confines large molecules while freely passing small ones.

CONT

Since the enzyme molecule entrapped is not chemically modified, its kinetic behavior in the hollow fiber enzyme reactor could be expected to be the same as that of the free enzyme. However, with hollow fiber reactors in the first category the permeation of substrate into the membrane is often the rate-determining step.... Thus, the apparent Michaelis constant Km(app) is often larger than the Km of the free enzyme. For example, a bacterial alkaline phosphatase entrapped in the outside region of a cellulose hollow fiber had a Km(app) l 700 times larger than the Km of the free enzyme.

OBS

In the first hollow fiber enzyme reactor... the enzyme solution was placed inside a fiber bundle, which was then temporarily sealed. The substrate solution was introduced to the container outside the hollow fibers. Substrate molecules passed through the fibers to be converted by the enzyme on the inside. Products diffused out.

French

Domaine(s)
  • Sciences biologiques
  • Biotechnologie
DEF

Fibre constituée d'un matériau poreux (une membrane semi-perméable) dont le diamètre interne est de l'ordre du mm. Les enzymes peuvent y être piégées. Il suffit de remplir de telles fibres par une solution d'enzymes et de sceller leurs extrémités. Des artifices technologiques permettent d'obtenir immédiatement des réacteurs.

CONT

Les fibres creuses présentent une grande surface d'échange (0,1 à 1,5 m2) avec un encombrement minimum. La pression est fournie par la pompe qui envoie la solution à concentrer dans les fibres ou par l'application d'une dépression du côté du filtrat. La solution à concentrer circule dans les fibres, dans le premier cas. Dans le second cas, le filtrat est «pompé» à travers les fibres, à partir d'une solution agitée. Les vitesses d'ultrafiltration sont très élevées (on peut atteindre 1 à plusieurs litres par heure selon le nombre de fibres).

Spanish

Campo(s) temático(s)
  • Ciencias biológicas
  • Biotecnología
Save record 3

Record 4 2011-01-07

English

Subject field(s)
  • Biological Sciences
CONT

With hollow fiber reactors... the permeation of substrate into the membrane is often the rate-determining step. Therefore, the reaction rate does not reach a maximum in the same concentration range as for free enzyme, because the actual substrate concentration in the chamber of enzyme solution is always lower than the bulk substrate concentration as a result of the enzyme reaction. Thus the apparent Michaelis constant Km(app) is often larger than the Km of the free enzyme. For example, a bacterial alkaline phosphatase entrapped in the outside region of a cellulose hollow fiber had a Km(app) 1 700 times larger than the Km of the free enzyme.

French

Domaine(s)
  • Sciences biologiques
CONT

Une différence fondamentale apparaît entre le comportement cinétique d'une enzyme libre et d'une enzyme immobilisée. Prenons l'exemple d'un réacteur à lit fixe : aux faibles débits, il existe une différence significative entre la concentration moyenne en substrat dans la colonne et la concentration à proximité du site actif de l'enzyme, et la valeur de K'm est plus élevée pour l'enzyme liée que pour l'enzyme libre.

Spanish

Save record 4

Record 5 2009-05-25

English

Subject field(s)
  • Surgical Instruments
CONT

A Deaver retractor (manual) is used to retract deep abdominal or chest incisions. Available in various widths.

OBS

Proper name: Deaver Retractor. ... Features: Hand held; Circular, curved blades; Handle curved oppositely to blade direction. Uses: Deep cavity tissue retraction.

OBS

In medical eponyms, the possessive form, such as "Deaver’s retractor", often disappears over the years. For that reason, the written form "Deaver retractor" is also found.

PHR

Flat handle lighted Deaver retractor; Deaver retractor with hollow grip handle; Deaver retractor with fiber optic light guide; Deaver retractor grip handle; pediatric Deaver retractor; narrow Deaver retractor; large Deaver retractor.

French

Domaine(s)
  • Instruments chirurgicaux

Spanish

Campo(s) temático(s)
  • Instrumental quirúrgico
OBS

Retractor de un solo brazo.

Save record 5

Record 6 2001-11-23

English

Subject field(s)
  • Textile Industries
  • Thread Spinning (Textiles)
CONT

Angora fiber is hollow, giving it insulating properties... it can be spun almost directly from the rabbit... Core spinning is another good method for spinning angora.

French

Domaine(s)
  • Industries du textile
  • Filature (Textiles)

Spanish

Save record 6

Record 7 1995-05-15

English

Subject field(s)
  • Water Treatment (Water Supply)
  • Food Industries
CONT

The design of the hollow fiber membrane module uses the fibers in a half loop with the free ends potted in epoxy resin. The loop end is contained in a pressure vessel. Feed solution is introduced around the outside of the hollow fiber. Filtrate passes through the fiber walls and flows up the bore to the open end of the fiber at the epoxy head. Brine is discharged from the opposite end of the pressure vessel.

French

Domaine(s)
  • Traitement des eaux
  • Industrie de l'alimentation
DEF

Module constitué d'un très grand nombre de fibres creuses assemblées en U ou en longueurs parallèles ou croisées, à l'intérieur d'un carter de géométrie tubulaire.

OBS

Le sens de la filtration peut avoir lieu de l'intérieur vers l'extérieur des fibres ou inversement.

OBS

Les modules fibres creuses ont pour avantage leur compacité, leur faible coût à l'achat et à l'entretien et leur faible consommation énergétique. Dans le cas où la séparation est effectuée de l'intérieur vers l'extérieur, les modules fibres creuses sont inadaptés aux produits visqueux ou chargés en particules.

Spanish

Save record 7

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