TERMIUM Plus^®

Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 DEF

The algebraic sum of the product of the molar concentration and ionic charge of each cationic and ionic species present.  2, record 1, English, - ionic%20balance

Record number: 1, Textual support number: 1 CONT

Ionic balances of watersheds have been used as means of quantifying the net basin reactions resulting from acid precipitation.  3, record 1, English, - ionic%20balance

Record number: 1, Textual support number: 1 OBS

In all waters this sum must be equal to zero. Any deviation from zero, of the balance calculated from the actual analytical results, is an indication either of the incompleteness of the determination (some ions not determined) or errors in analysis.  2, record 1, English, - ionic%20balance

Record number: 1, Textual support number: 2 OBS

ionic balance: term and definition standardized by ISO.  4, record 1, English, - ionic%20balance

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Somme algébrique des produits de la concentration molaire par la charge ionique de tous les cations et anions présents.  3, record 1, French, - bilan%20ionique

Record number: 1, Textual support number: 1 OBS

Dans toutes les eaux, cette somme doit être égale à zéro. Tout écart par rapport à zéro de la balance calculée à partir des résultats analytiques réels est indication soit d'une analyse incomplète (certains ions non déterminés), soit d'erreurs d'analyse.  3, record 1, French, - bilan%20ionique

Record number: 1, Textual support number: 2 OBS

bilan ionique : terme et définition normalisés par l'ISO.  4, record 1, French, - bilan%20ionique

Record 1,  Textual support,  Spanish

Record number: 1, Textual support number: 1 DEF

Suma algebraica del producto de la concentración molar y la carga iónica de cada anión y catión de los compuestos químicos presentes.  1, record 1, Spanish, - balance%20i%C3%B3nico

Record number: 1, Textual support number: 1 OBS

En todas las aguas, esta suma debe ser igual a cero. Toda desviación de cero del balance calculado de los resultados analíticos actuales, indica un análisis incompleto de la determinación (algunos iones no se han determinado) o un error en el análisis.  1, record 1, Spanish, - balance%20i%C3%B3nico

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

The product of the molar concentration of the nucleic acid and time of reaction at 65°C. It may be expressed in terms of moles of nucleotides times seconds per litre. It is used in the measurement of reassociation of heat-denatured DNA.  3, record 2, English, - cot%20unit

Record number: 2, Textual support number: 1 OBS

A similar term, the rot value, is used for DNA:RNA hybridization experiments in which cDNA is hybridized with an excess of RNA; it is the product of the reaction time and the initial RNA.  2, record 2, English, - cot%20unit

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 DEF

Produit de la concentration molaire en nucléotides et du temps d'incubation à 65°C exprimé en (moles/litre) x secondes. Il est utilisé dans les cinétiques de renaturation de l'ADN.  2, record 2, French, - Cot

Record number: 2, Textual support number: 1 OBS

Le terme Cot peut s'écrire C_ot.  3, record 2, French, - Cot

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

A concentration in which the amount of solute is stated in moles and the amount of solvent in kilograms (i.e., moles of solute per kilogram of solvent).  2, record 3, English, - molal%20concentration

Record number: 3, Textual support number: 1 CONT

The unit of molality is moles of solute per kilogram of solvent and is designated by a small m.  3, record 3, English, - molal%20concentration

Record number: 3, Textual support number: 1 OBS

"molal concentration" should not be confused with the term molar.  3, record 3, English, - molal%20concentration

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

[...] concentration d'une solution dont la quantité de soluté est donnée en moles et la quantité de solvant en kilogramme (c.-à-d. nombre de moles de soluté par kilogramme de solvant).  2, record 3, French, - concentration%20molale

Record 3,  Textual support,  Spanish

Record 4,  Textual support,  English

Record number: 4, Textual support number: 1 DEF

A proportionality constant between the velocity of a chemical reaction and the concentrations of the reacting species for a chemical reaction in which the velocity of the reaction is proportional to the concentration of one reactant.  2, record 4, English, - first%2Dorder%20rate%20constant

Record number: 4, Textual support number: 1 CONT

First-order reactions are those which proceed at a rate exactly proportional to the concentration of one reactant.... Then the reaction rate at any time t is given by the first-order rate equation... where(A) is the molar concentration of A and-d(A)/dt is the rate at which the concentration of A decreases. The proportionality constant k is called the rate constant or specific reaction rate. First-order rate constants have the dimensions of reciprocal time, usually S^-1.  3, record 4, English, - first%2Dorder%20rate%20constant

Record number: 4, Textual support number: 1 OBS

Because of technical constraints, the formula(s) given in CBT-167 could not be reproduced.  4, record 4, English, - first%2Dorder%20rate%20constant

Record 4,  Textual support,  French

Record number: 4, Textual support number: 1 CONT

Les réactions du premier ordre sont celles dont la vitesse est exactement proportionnelle à la concentration d'un réactif. [...] Dans ce cas, la vitesse de la réaction à un temps quelconque t est donnée par l'expression : [...] où (A) est la concentration molaire de A et - d(A)/dt, la vitesse à laquelle la concentration de A décroît. La constante de proportionnalité k est appelée constante de vitesse. Les constantes de vitesse des réactions du premier ordre ont pour dimension l'inverse du temps, c'est-à-dire s^-1.  1, record 4, French, - constante%20de%20vitesse%20des%20r%C3%A9actions%20du%20premier%20ordre

Record number: 4, Textual support number: 1 OBS

En raison de contraintes d'ordre technique, les formules figurant dans la source CBT-167 ne peuvent être reproduites.  2, record 4, French, - constante%20de%20vitesse%20des%20r%C3%A9actions%20du%20premier%20ordre

Record 4,  Textual support,  Spanish

Record 5,  Textual support,  English

Record number: 5, Textual support number: 1 DEF

[A solution] containing one equivalent weight of a dissolved substance per liter of solution.  3, record 5, English, - normal%20solution

Record number: 5, Textual support number: 2 DEF

A solution which contains one gram molecular weight of a solution divided by the hydrogen equivalent of the substance, per litre.  4, record 5, English, - normal%20solution

Record number: 5, Textual support number: 1 OBS

Thus HCl would be 1 mole divided by 1 H equivalent or 1 molar. H₂SO₄ would be 1 mole divided by 2 H equivalents or 0.5 moles.  4, record 5, English, - normal%20solution

Record number: 5, Textual support number: 2 OBS

A standard measure of concentration, indicated by [the italicized letter] N, e. g. 2 N, 0. 5 N, etc. See also molar.  3, record 5, English, - normal%20solution

Record number: 5, Textual support number: 1 CONT

The aqueous extract is ... slowly added to 250 ml of 6 N hydrochloric acid.  5, record 5, English, - normal%20solution

Record 5,  Textual support,  French

Record number: 5, Textual support number: 1 DEF

Liqueur titrée contenant une valence-gramme active par litre (par exemple 1 molécule gramme d'acide chlorhydrique ou une demi-molécule gramme d'acide sulfurique par litre).  5, record 5, French, - solution%20normale

Record number: 5, Textual support number: 1 CONT

Mélanger dans un récipient contenant 10 à 15 ml d'acide chlorhydrique 6 N et noter le volume obtenu.  6, record 5, French, - solution%20normale

Record number: 5, Textual support number: 2 CONT

[...] une solution d'acide nitrique 2 N (masse moléculaire = 63,0) renferme 2 X 63, soit 126 grammes, d'acide nitrique par litre.  7, record 5, French, - solution%20normale

Record number: 5, Textual support number: 1 OBS

N : Cette abréviation s'écrit en italique.  8, record 5, French, - solution%20normale

Record 5,  Textual support,  Spanish

Record number: 5, Textual support number: 1 DEF

[Solución] que contiene un equivalente-gramo de soluto por cada litro de disolución.  2, record 5, Spanish, - soluci%C3%B3n%20normal

Record 6,  Textual support,  English

Record number: 6, Textual support number: 1 DEF

a law in physics: the absorption of light by different concentrations of the same solute dissolved in the same solvent is an exponential function of the concentration provided the thickness of the absorbing medium remains constant.  3, record 6, English, - Beer%20law

Record number: 6, Textual support number: 1 CONT

The law discovered by Beer in 1852, that the absorption coefficient for light passing through a solution of a given salt in a non-absorbing solvent is proportional to the concentration.... Sometimes written I=I₀e^{-a[ alpha}cx where I is the intensity of light transmitted, I₄ is the intensity of the incident light, e is the natural logarithmic base, c is the concentration of the solution in moles per liter, x is the thickness of the transmitting layer, and a [alpha] is the molar absorption coefficient.  1, record 6, English, - Beer%20law

Record number: 6, Textual support number: 1 OBS

In general, Beer’s law is used for light of a particular narrow wavelength band and then "a" [alpha] is the specular molar absorption coefficient. The Beer law is also written I = I₀10^ecx where "e" is known as the molar extinction coefficient. Not all solutions obey the Beer law.  1, record 6, English, - Beer%20law

Record number: 6, Textual support number: 2 OBS

See also the "Bouguer law".  1, record 6, English, - Beer%20law

Record 6,  Textual support,  French

Record number: 6, Textual support number: 1 DEF

loi qui permet de calculer la quantité de lumière transmise à travers une épaisseur donnée x de substance absorbante. Elle s'exprime par la relation I = I₀e^-ax, I étant l'intensité transmise, I₀ l'intensité initiale et "a" [alpha] une constante.  2, record 6, French, - loi%20de%20Beer

Record number: 6, Textual support number: 2 DEF

Loi limite, à la base de la colorimétrie, indiquant qu'aux faibles concentrations et pour une longueur d'onde déterminée, l'intensité I de la lumière transmise est donnée par I = I₀. e^-kcl en appelant I₀ l'intensité initiale, "c" la concentration de la substance dissoute et "l" l'épaisseur traversée.  3, record 6, French, - loi%20de%20Beer

Record 6,  Textual support,  Spanish