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Record 1,  Textual support,  English

Record number: 1, Textual support number: 1 CONT

Flotation modifiers include several classes of chemicals as described below. ... Alkalinity regulators such as lime, caustic soda, soda ash, and sulfuric acid are used to control or adjust pH, a very critical factor in many flotation separations.  1, record 1, English, - alkalinity%20regulator

Record number: 1, Textual support number: 1 OBS

pH regulators: Substances used in flotation processes to control the hydrogen-ion concentration.  3, record 1, English, - alkalinity%20regulator

Record 1,  Textual support,  French

Record number: 1, Textual support number: 1 DEF

Réactif utilisé pour amener le pH de la pulpe à une valeur choisie.  3, record 1, French, - r%C3%A9gulateur%20de%20pH

Record 1,  Textual support,  Spanish

Record 2,  Textual support,  English

Record number: 2, Textual support number: 1 DEF

Type of chromatography developed following the observation that certain proteins were unexpectedly retained on affinity gels containing hydrophobic spacer arms. This concept was extended, and families of hydrophobic adsorbents prepared using a homologous series of hydrocarbon chains of different lengths. In practice most proteins can be satisfactorily purified using C-8 or phenyl substituents. Hydrophobic interactions are strongest at high ionic strength, so adsorption to a hydrophobic matrix can be conveniently performed after a salt precipitation or ion exchange chromatography step. Elution can be effected by altering the solvent ionic strength, pH, or composition or by the use of a dielectric constant modifier such as ethanediol.  2, record 2, English, - hydrophobic%20chromatography

Record number: 2, Textual support number: 1 CONT

When carrying out the hydrophobic chromatography of human urokinase ..., the solution containing the crude urokinase which is prepared from human urine in the usual simple method, is adjusted to a salt concentration of 0.2 to 2 M, preferably 0.2 to 1 M. The solution is then made to flow through the hydrophobic column packed with the protein adsorbent of this process.... The pH is not critical when carrying out the hydrophobic chromatography, however, the pH is usually adjusted to pH 5.5 to 10, preferably 6 to 8.5 at which pH urokinase is stable against inactivation. Purified urokinase can be obtained by treating the effluent from the hydrophobic column in a usual method, namely by lyophilization after desalting.  3, record 2, English, - hydrophobic%20chromatography

Record 2,  Textual support,  French

Record number: 2, Textual support number: 1 CONT

Certaines observations faites en chromatographie d'affinité ont montré que divers effets non spécifiques étaient attribuables à des interactions de type hydrophobe. De là est venue l'idée d'employer des chaînes carbonées fixées à un support d'agarose. On dispose maintenant de familles de composés, ne différant entre eux que par de minimes variantes de structure, mais présentant des propriétés chromatographiques intéressantes. Diverses protéines se fixent réversiblement et selon des modalités variées à ces chaînes hydrophobes : c'est donc une possibilité de séparation. Cette chromatographie "hydrophobe" est actuellement en expansion.  2, record 2, French, - chromatographie%20hydrophobe

Record 2,  Textual support,  Spanish

Record 3,  Textual support,  English

Record number: 3, Textual support number: 1 DEF

Logarithm of the reciprocal of the hydrogen-ion concentration in a solution (-log₁₀[H⁺]) used as a measure of the degree of acidity or alkalinity of this solution.  3, record 3, English, - pH

Record number: 3, Textual support number: 1 CONT

Roughly, pH can be divided into the following ranges: pH 0-2: Strongly acidic; pH 3-5: Weakly acidic; pH 6-8: Neutral; pH 9-11: Weakly basic; pH 12-14: Strongly basic. Under the Controlled Products Regulations, materials with pH values of 0-2 or 11.5-14 may be classified corrosive.  4, record 3, English, - pH

Record number: 3, Textual support number: 1 OBS

A pH of 7 is regarded as neutral (pure water), a pH less than 7 corresponds to an acid solution and a pH greater than 7 corresponds to an alkaline solution.  3, record 3, English, - pH

Record number: 3, Textual support number: 2 OBS

It should be noted that the pH scale is a logarithmic scale; a substance with a pH of 4 is more than twice as acid as a substance with a pH of 5. Similarly, a substance with a pH of 9 is much more than twice as alkaline as a substance with a pH of 8.  5, record 3, English, - pH

Record number: 3, Textual support number: 1 PHR

pH buffer solution, control, decline, diagram, electrode, gradient, indicator, limit, measurement, meter, modifier, probe, range, scale, unit, value.  6, record 3, English, - pH

Record 3,  Textual support,  French

Record number: 3, Textual support number: 1 DEF

Indice exprimant l'activité (ou la concentration) de l'ion hydrogène dans une solution à l'aide d'une échelle logarithmique.  5, record 3, French, - pH

Record number: 3, Textual support number: 1 OBS

Si le pH est inférieur à 7, la solution est acide; s'il est supérieur, elle est alcaline.  5, record 3, French, - pH

Record number: 3, Textual support number: 1 PHR

valeur de pH.  6, record 3, French, - pH

Record 3,  Textual support,  Spanish

Record number: 3, Textual support number: 1 DEF

Cologaritmo de la concentración de iones hidrógeno en una solución (-log₁₀[H⁺]) utilizado como medida del grado de acidez o alcalinidad de esta solución.  3, record 3, Spanish, - pH

Record number: 3, Textual support number: 1 OBS

Un pH de 7 se considera neutro (agua pura), un pH inferior a 7 corresponde a una solución ácida y un pH superior a 7 a una solución alcalina.  3, record 3, Spanish, - pH

Record number: 3, Textual support number: 1 PHR

valor de pH.  4, record 3, Spanish, - pH