LrgpV1, Istex, Corpus, bibRecord, 001589

Use of date products in production of the thermophilic dairy starter strain Streptococcus thermophilus

Identifieur interne : 001589 ( Istex/Corpus ); précédent : 001588; suivant : 001590

Use of date products in production of the thermophilic dairy starter strain Streptococcus thermophilus

Auteurs : Nabil Nancib ; Mostefa Ghoul ; Larbi Larous ; Aïcha Nancib ; Leila-Zed Adimi ; Mouloud Remmal ; Joseph Boudrant

Source :

Bioresource Technology [ 0960-8524 ] ; 1998.

RBID : ISTEX:2A5A862A978F73E2ADC41A49B2C5FBD4728D3CCA

English descriptors

Abstract

Abstract: Date-coat sugar extract and date-seed hydrolysate were utilized as the main constituents of a medium for the production of a thermophilic dairy starter strain. Date-coat sugar extract was used as the carbon source, while date-seed hydrolysate was used as the nitrogen source. A suitable concentration of date-coat sugar was in the range of 50 mg sugar/ml. Addition of various amounts of date-seed hydrolysate as the sole nitrogen source in the medium showed that, in spite of a nitrogen insufficiency found in the hydrolysate, the production of the starter strain increased with date-seed hydrolysate (nitrogen) concentration, but the maximum production of biomass was less than that observed with other nitrogen sources. Therefore, various amounts of urea were added and a mixture of urea (6 mg/ml) and of date-seed hydrolysate (4.0 mg/ml) allowed an increase in the concentration of the biomass. The addition of date-seed ash as a mineral source, at a concentration of 1.0 mg/ml in the medium containing date-coat sugar extract, date-seed hydrolysate, and urea could substitute for MgSO4, and MnSO4 of the usual medium. This medium gave the maximum production of the thermophilic lactic acid bacteria (0.57 mg/ml) and lactic acid (2 mg/ml), very close to what was obtained with the Elliker broth medium.

Url:

https://api.istex.fr/document/2A5A862A978F73E2ADC41A49B2C5FBD4728D3CCA/fulltext/pdf

DOI: 10.1016/S0960-8524(98)00115-1

Links to Exploration step

ISTEX:2A5A862A978F73E2ADC41A49B2C5FBD4728D3CCA

Le document en format XML

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<front><div type="abstract" xml:lang="en">Abstract: Date-coat sugar extract and date-seed hydrolysate were utilized as the main constituents of a medium for the production of a thermophilic dairy starter strain. Date-coat sugar extract was used as the carbon source, while date-seed hydrolysate was used as the nitrogen source. A suitable concentration of date-coat sugar was in the range of 50 mg sugar/ml. Addition of various amounts of date-seed hydrolysate as the sole nitrogen source in the medium showed that, in spite of a nitrogen insufficiency found in the hydrolysate, the production of the starter strain increased with date-seed hydrolysate (nitrogen) concentration, but the maximum production of biomass was less than that observed with other nitrogen sources. Therefore, various amounts of urea were added and a mixture of urea (6 mg/ml) and of date-seed hydrolysate (4.0 mg/ml) allowed an increase in the concentration of the biomass. The addition of date-seed ash as a mineral source, at a concentration of 1.0 mg/ml in the medium containing date-coat sugar extract, date-seed hydrolysate, and urea could substitute for MgSO4, and MnSO4 of the usual medium. This medium gave the maximum production of the thermophilic lactic acid bacteria (0.57 mg/ml) and lactic acid (2 mg/ml), very close to what was obtained with the Elliker broth medium.</div>
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<abstract xml:lang="en"><p>Date-coat sugar extract and date-seed hydrolysate were utilized as the main constituents of a medium for the production of a thermophilic dairy starter strain. Date-coat sugar extract was used as the carbon source, while date-seed hydrolysate was used as the nitrogen source. A suitable concentration of date-coat sugar was in the range of 50 mg sugar/ml. Addition of various amounts of date-seed hydrolysate as the sole nitrogen source in the medium showed that, in spite of a nitrogen insufficiency found in the hydrolysate, the production of the starter strain increased with date-seed hydrolysate (nitrogen) concentration, but the maximum production of biomass was less than that observed with other nitrogen sources. Therefore, various amounts of urea were added and a mixture of urea (6 mg/ml) and of date-seed hydrolysate (4.0 mg/ml) allowed an increase in the concentration of the biomass. The addition of date-seed ash as a mineral source, at a concentration of 1.0 mg/ml in the medium containing date-coat sugar extract, date-seed hydrolysate, and urea could substitute for MgSO4, and MnSO4 of the usual medium. This medium gave the maximum production of the thermophilic lactic acid bacteria (0.57 mg/ml) and lactic acid (2 mg/ml), very close to what was obtained with the Elliker broth medium.</p>
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<item><term>Date products</term>
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<item><term>Streptococcus thermophilus</term>
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<item><term>Lactic acid</term>
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<item><term>Culture</term>
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<head><ce:title>Use of date products in production of the thermophilic dairy starter strain <ce:italic>Streptococcus thermophilus</ce:italic>
</ce:title>
<ce:author-group><ce:author><ce:given-name>Nabil</ce:given-name>
<ce:surname>Nancib</ce:surname>
<ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup>
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<ce:author><ce:given-name>Mostefa</ce:given-name>
<ce:surname>Ghoul</ce:surname>
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<ce:author><ce:given-name>Larbi</ce:given-name>
<ce:surname>Larous</ce:surname>
<ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup>
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<ce:author><ce:given-name>Aïcha</ce:given-name>
<ce:surname>Nancib</ce:surname>
<ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup>
</ce:cross-ref>
</ce:author>
<ce:author><ce:given-name>Leila-zed</ce:given-name>
<ce:surname>Adimi</ce:surname>
<ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup>
</ce:cross-ref>
</ce:author>
<ce:author><ce:given-name>Mouloud</ce:given-name>
<ce:surname>Remmal</ce:surname>
<ce:cross-ref refid="AFF1"><ce:sup>a</ce:sup>
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<ce:author><ce:given-name>Joseph</ce:given-name>
<ce:surname>Boudrant</ce:surname>
<ce:cross-ref refid="COR1"><ce:sup>∗</ce:sup>
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<ce:cross-ref refid="AFF2"><ce:sup>b</ce:sup>
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<ce:affiliation id="AFF1"><ce:label>a</ce:label>
<ce:textfn>Department of Microbiology, Institut of Biology, University of Setif, Setif, Algeria</ce:textfn>
</ce:affiliation>
<ce:affiliation id="AFF2"><ce:label>b</ce:label>
<ce:textfn>LSGC-CNRS-ENSAIA, BP 172, 2, avenue de la forêt de Haye, 54505, Vandoeuvre-les-Nancy, France</ce:textfn>
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<ce:text>Corresponding author.</ce:text>
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<ce:abstract><ce:section-title>Abstract</ce:section-title>
<ce:abstract-sec><ce:simple-para>Date-coat sugar extract and date-seed hydrolysate were utilized as the main constituents of a medium for the production of a thermophilic dairy starter strain. Date-coat sugar extract was used as the carbon source, while date-seed hydrolysate was used as the nitrogen source. A suitable concentration of date-coat sugar was in the range of 50 mg sugar/ml. Addition of various amounts of date-seed hydrolysate as the sole nitrogen source in the medium showed that, in spite of a nitrogen insufficiency found in the hydrolysate, the production of the starter strain increased with date-seed hydrolysate (nitrogen) concentration, but the maximum production of biomass was less than that observed with other nitrogen sources. Therefore, various amounts of urea were added and a mixture of urea (6 mg/ml) and of date-seed hydrolysate (4.0 mg/ml) allowed an increase in the concentration of the biomass. The addition of date-seed ash as a mineral source, at a concentration of 1.0 mg/ml in the medium containing date-coat sugar extract, date-seed hydrolysate, and urea could substitute for MgSO<ce:inf>4</ce:inf>
, and MnSO<ce:inf>4</ce:inf>
 of the usual medium. This medium gave the maximum production of the thermophilic lactic acid bacteria (0.57 mg/ml) and lactic acid (2 mg/ml), very close to what was obtained with the Elliker broth medium.</ce:simple-para>
</ce:abstract-sec>
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<ce:keywords><ce:section-title>Keywords</ce:section-title>
<ce:keyword><ce:text>Date products</ce:text>
</ce:keyword>
<ce:keyword><ce:text><ce:italic>Streptococcus thermophilus</ce:italic>
</ce:text>
</ce:keyword>
<ce:keyword><ce:text>Lactic acid</ce:text>
</ce:keyword>
<ce:keyword><ce:text>Culture</ce:text>
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<name type="personal"><namePart type="given">Nabil</namePart>
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<name type="personal"><namePart type="given">Joseph</namePart>
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<abstract lang="en">Abstract: Date-coat sugar extract and date-seed hydrolysate were utilized as the main constituents of a medium for the production of a thermophilic dairy starter strain. Date-coat sugar extract was used as the carbon source, while date-seed hydrolysate was used as the nitrogen source. A suitable concentration of date-coat sugar was in the range of 50 mg sugar/ml. Addition of various amounts of date-seed hydrolysate as the sole nitrogen source in the medium showed that, in spite of a nitrogen insufficiency found in the hydrolysate, the production of the starter strain increased with date-seed hydrolysate (nitrogen) concentration, but the maximum production of biomass was less than that observed with other nitrogen sources. Therefore, various amounts of urea were added and a mixture of urea (6 mg/ml) and of date-seed hydrolysate (4.0 mg/ml) allowed an increase in the concentration of the biomass. The addition of date-seed ash as a mineral source, at a concentration of 1.0 mg/ml in the medium containing date-coat sugar extract, date-seed hydrolysate, and urea could substitute for MgSO4, and MnSO4 of the usual medium. This medium gave the maximum production of the thermophilic lactic acid bacteria (0.57 mg/ml) and lactic acid (2 mg/ml), very close to what was obtained with the Elliker broth medium.</abstract>
<subject><genre>Keywords</genre>
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Use of date products in production of the thermophilic dairy starter strain Streptococcus thermophilus

Use of date products in production of the thermophilic dairy starter strain Streptococcus thermophilus

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