Publication

The production of lactic acid from whey permeate by Lactobacillus helveticus

Urs von Stockar
1989
Journal Articles

Abstract

The effect of pH on growth and lactic acid prodn. of L. helveticus was investigated in a continuous culture using supplemented whey ultrafiltrate. Max. lactate productivity of 5 g/L/h occurred at pH 5.5. Whey permeates concd. up to 4 times were fermented using batch cultures. Max. lactic acid concn. of 95 g/L was attained, but residual sugars indicated a possible limitation in growth factors. [on SciFinder (R)]

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Urs von Stockar
1989
Journal Articles

Abstract

Official source

Related concepts (32)

In chemistry, pH (piːˈeɪtʃ ), also referred to as acidity, historically denotes "potential of hydrogen" (or "power of hydrogen"). It is a scale used to specify the acidity or basicity of an aqueous solution. Acidic solutions (solutions with higher concentrations of hydrogen () ions) are measured to have lower pH values than basic or alkaline solutions. The pH scale is logarithmic and inversely indicates the activity of hydrogen ions in the solution. where [H+] is the equilibrium molar concentration (mol/L) of H+ in the solution.

Growth factor

A growth factor is a naturally occurring substance capable of stimulating cell proliferation, wound healing, and occasionally cellular differentiation. Usually it is a secreted protein or a steroid hormone. Growth factors are important for regulating a variety of cellular processes. Growth factors typically act as signaling molecules between cells. Examples are cytokines and hormones that bind to specific receptors on the surface of their target cells. They often promote cell differentiation and maturation, which varies between growth factors.

Lactic acid

Lactic acid is an organic acid. It has a molecular formula . It is white in the solid state and it is miscible with water. When in the dissolved state, it forms a colorless solution. Production includes both artificial synthesis as well as natural sources. Lactic acid is an alpha-hydroxy acid (AHA) due to the presence of a hydroxyl group adjacent to the carboxyl group. It is used as a synthetic intermediate in many organic synthesis industries and in various biochemical industries.

Related publications (10)

The production of lactic acid from whey permeate by Lactobacillus helveticus

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