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HALF CELL [10 records]

Record 1 2026-05-06

English

Subject field(s)
  • Morphology and General Physiology
  • Cytology
CONT

Hemifusomes consist of two vesicles, which are membrane sacs filled with liquid and formed by hemifusion, meaning that the smaller of the two is fused to the larger one like a hemisphere, almost as if its other half is missing. This occurs when the outer layers of two membranes merge first while the inner membrane layers stay open until a thin connection between them forms a new vesicle. The attached vesicles are sometimes found on the outside of the organelle and sometimes on the inside, and though where exactly these vesicles originate is still unknown, hemifusomes are thought to facilitate the formation of new vesicles that transport materials throughout the cell. This is probably how they take out cellular trash.

French

Domaine(s)
  • Morphologie et physiologie générale
  • Cytologie
CONT

Connaissez-vous les hémifusomes? [...] Les hémifusomes sont constitués de deux vésicules à moitié fusionnées (il reste une membrane entre les deux). Selon les scientifiques américains qui ont publié leur trouvaille dans «Nature Communications», les hémifusomes faciliteraient la formation de nouvelles vésicules, de petites «bulles» qui permettent de récupérer les déchets cellulaires, comme les protéines inutilisées, et de les recycler.

Spanish

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Record 2 2017-04-13

English

Subject field(s)
  • Cytology
  • Molecular Biology
  • Biochemistry
DEF

A situation in which the total level of a gene product... produced by the cell is about half of the normal level and is not sufficient to permit the cell to function normally.

Key term(s)
  • haplo-insufficiency

French

Domaine(s)
  • Cytologie
  • Biologie moléculaire
  • Biochimie
DEF

Situation dans laquelle le produit d’un seul allèle, bien qu’actif, est synthétisé en quantité insuffisante pour permettre le fonctionnement normal de la cellule.

OBS

haplo-insuffisance : terme et définition publiés au Journal officiel de la République française le 1er octobre 2016.

Spanish

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Record 3 2013-11-15

English

Subject field(s)
  • Genetics
DEF

The gametic chromosome number. A germ cell(an ovum or a spermatozoon) which has half as many chromosomes as the somatic or body cells of the same individual has such a number of chromosomes. The full number of chromosomes, as found in the cells of the body, is described as diploid. The haploid number of chromosomes in a human being is 23.

French

Domaine(s)
  • Génétique
DEF

Nombre de chromosomes, constitutifs d'un lot, identique chez tous les individus d'une même espèce, différent d'une espèce à l'autre. Dans l'espèce humaine, ce nombre est 23.

Spanish

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Record 4 2011-10-12

English

Subject field(s)
  • Electrolysis (Electrokinetics)
  • Electrochemistry
  • Analytical Chemistry
DEF

An electrode or half cell in which potential measurements are made through a glass membrane, which acts as a cation-exchange membrane.

CONT

In the potentiometric procedures, the more important pH-indicating electrodes are the hydrogen-gas electrode, the quinhydrone electrode, and the glass electrode. Each of these, in combination with a reference electrode, constitutes a chemical cell whose potential can be used to determine the hydrogen-ion activity of a solution.

French

Domaine(s)
  • Électrolyse (Électrocinétique)
  • Électrochimie
  • Chimie analytique
CONT

[...] l'électrode de verre [...] se compose d'une membrane de verre en forme de boule, à l'intérieur de laquelle a été introduite une solution-tampon où plonge une électrode de référence.

CONT

On constitue avec la solution de pH inconnu une cellule électrochimique dont l'une des deux électrodes a un potentiel dépendant du pH. [...] L'électrode indicatrice peut être une électrode à hydrogène, une électrode à quinhydrone, une électrode d'antimoine, ou plus commodément une électrode de verre.

OBS

L'électrode constitue une demi-cellule puisque cette dernière comprend deux électrodes.

Spanish

Campo(s) temático(s)
  • Electrólisis (Electrocinética)
  • Electroquímica
  • Química analítica
DEF

Electrodo en el que la medida de potencial se realiza a través de una cubierta de vidrio que lo rodea e intercambia sus cationes con los de la disolución en que está sumergido.

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Record 5 2011-07-26

English

Subject field(s)
  • Lighting Fixtures
  • Urban Planning
DEF

An outside lighting installation fitted to a pole and comprising, unless otherwise indicated, a support no longer than two and a half metres, a reflector inside a metal case, a bulb and a refractor, and including in some instances a photoelectric cell.

French

Domaine(s)
  • Luminaires
  • Aménagement urbain
DEF

Appareil d'éclairage extérieur fixé à un poteau et comprenant, sauf indication contraire, un support n'excédant pas deux mètres et demi de longueur, une enveloppe métallique abritant un réflecteur, une ampoule et un diffuseur, et comportant dans certains cas une cellule photoélectrique.

Spanish

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Record 6 2004-07-28

English

Subject field(s)
  • Atmospheric Physics
DEF

The middle and most intense phase in the life cycle of a thunderstorm cell; begins when precipitation reaches Earth’s surface and is characterized by both updrafts and downdrafts.

CONT

The life cycle of a thunderstorm cell can be divided into three stages which are determined by the magnitude and direction of the predominating vertical motions within the cell. These stages include(1) the cumulus stage,(2) the mature stage, and(3) the dissipation stage.... The mature stage is characterized by the existence of both updrafts and downdrafts in the lower half of the cell. The start of this stage is marked when the rain first falls distinctly out of the bottom of the cloud. It is during this stage that the most intense lightning occurs, the heaviest rains are recorded at the surface, and the strongest winds are observed. If present, hail will occur during this stage.

French

Domaine(s)
  • Physique de l'atmosphère
CONT

Le stade de maturité commence lorsque les précipitations commencent à tomber de la base du nuage. [...] Ce stade de maturité constitue la période d'orage; il dure de quinze à vingt minutes. On y observe des éclairs soit au sein même du nuage (horizontaux, dits «crawler») soit dirigés vers le sol (éclairs Cloud-Ground ou CG) accompagnés de tonnerre et d'averses (de pluie, de neige ou de grêle en fonction des circonstances). Les températures sont plus basses dans les courants descendants en comparaison avec l'air environnant et contrastent spécialement avec les températures dans les courants ascendants [...]

CONT

Un orage est composé de différentes cellules qui se trouvent à un stade de développement différent. Le cycle de vie d'une des cellules comporte trois stades : cumulus (ou naissance), adulte et dissipation. [...] Le stade adulte est [...] caractérisé par la présence simultanée de courants ascendants, de courants descendants et de pluie.

Spanish

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Record 7 2003-06-17

English

Subject field(s)
  • Orbital Stations
  • Research Experiments in Space
CONT

DIDO Experiment Container is essentially a box with a side length of 150 mm. Design philosophy of DIDO experiment foreseen an "all inside" approach, so(at this moment) the experiment container is a mere box with no windows or openings, or relevant external features. DIDO EC is intended as a structural part for the inside experiment; only mechanical, electrical and data interfaces are required to connect DIDO EC with GLAD facility. The box is assembled as one piece but the topside is removable to have access to DIDO experiment. In this way the topside component works as a cover plate. The EC is made by(TBD) material and to meet safety requirements EC' s corners are slightly rounded, materials must not be flammable and machined with non-toxic surface treatment. Cover plate is connected with the box through screws. The bottom side, instead, compose the "first plate" of DIDO experiment, housing tanks and pumping system. Another plate placed about half height provides a "second plate" for DIDO cell and relative optics, laser unit and CCD camera.

OBS

Objectives of the experiment DIDO ... is the measurement of diffusion coefficients in a three-component solution. It’s impossible to carry out these measurements on Earth because in a diffusion boundary, when the transport is promoted by at least two independent driving forces, convention instabilities may arise, called "fingers" and "overstability."

OBS

DIDO experiment container: term officially approved by the International Space Station official approval Group (ISSOAG).

French

Domaine(s)
  • Stations orbitales
  • Travaux de recherche dans l'espace
OBS

contenant expérimental DIDO : terme uniformisé par le Groupe de travail de la terminologie de la Station spatiale internationale (GTTSSI).

Spanish

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Record 8 2003-04-16

English

Subject field(s)
  • Containers
DEF

A container which has a standard length and width but only half the height.

OBS

It is suitable for the carriage of dense cargoes since these take up a relatively small space in relation to their weight. Two half height containers occupy one cell in a containership. This container often has an open top with a waterproof cover since many of the cargoes are loaded from the top.

Key term(s)
  • half height container

French

Domaine(s)
  • Conteneurs
DEF

Conteneur de 4 pieds ou de 4 pieds 3 pouces de haut, mais de même longueur et de même largeur que les conteneurs de 8 pieds ou de 8 pieds 6 pouces de haut.

OBS

conteneur mi-hauteur : terme uniformisé par le CN.

Spanish

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Record 9 1997-11-24

English

Subject field(s)
  • Electrochemistry
  • Electrometallurgy
DEF

An electrode of an electrolytic cell and the electrolyte with which it is in contact.

CONT

When, for instance, a copper electrode is in contact with even a dilute solution of copper sulphate, the metal becomes positively charged with respect to the solution and the copper and its sulphate solution constitute a half cell.

French

Domaine(s)
  • Électrochimie
  • Électrométallurgie

Spanish

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Record 10 1985-03-25

English

Subject field(s)
  • Biochemistry
CONT

It should be kept in mind that the catalysts used in many chemical processes has half lives of months or years, often at very high temperatures and pressures. The catalytic half lives of several immobilized cell systems also are very respectable : 120 days(aspartic acid production), more than 50 days(malic acid production), more than 270 days(malic acid degradation), and 60 days(glucose isomerization).

French

Domaine(s)
  • Biochimie
CONT

Il ne faut pas perdre de vue que les catalyseurs utilisés dans de nombreux procédés chimiques ont des demi-vies qui se comptent en mois ou en années, souvent à des températures et à des pressions très élevées. Les demi-vies catalytiques de plusieurs systèmes à cellules immobilisées sont également très respectable : 120 jours (production d'acide aspartique), plus de 50 jours (production d'acide malique), plus de 270 jours (dégradation de l'acide malique) et 60 jours (isomérisation du glucose).

Spanish

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