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  • Yogurt-like beverages made of a mixture of cereals, soy and grape must: microbiology, texture, nutritional and sensory properties.

Yogurt-like beverages made of a mixture of cereals, soy and grape must: microbiology, texture, nutritional and sensory properties.

International journal of food microbiology (2012-02-22)
Rossana Coda, Alessia Lanera, Antonio Trani, Marco Gobbetti, Raffaella Di Cagno
ABSTRACT

Cereal (rice, barley, emmer and oat) and soy flours and concentrated red grape must were used for making vegetable yogurt-like beverages (VYLB). Two selected strains of Lactobacillus plantarum were used for lactic acid fermentation, according to a process which included the flour gelatinization. All VLYB had values of pH lower than 4.0 and both selected starters remained viable at ca. 8.4 log cfu/g throughout storage. All VLYB showed high values of apparent viscosity and water holding capacity. During fermentation, lactic acid bacteria consumed glucose, fructose, and malic acid, which was supplied with grape must. Compared to control vegetable yogurt-like beverages (CVYLB), without bacterial inoculum, an increase of total free amino acids (FAA) was found during fermentation and storage. Also the concentration of polyphenolic compounds and ascorbic acid (ASC) was higher in VLYB compared to CVYLB. This was reflected on the antioxidant activity. As determined by Solid Phase Micro-Extraction/Gas-Chromatography/Mass-Spectrometry analysis, several volatile compounds were identified. Beverages made with the mixture of rice and barley or emmer flours seemed to possess the best combination textural, nutritional and sensory properties.

MATERIALS
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Product Description

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SPME fiber assortment kit 2, for use with manual holder, needle size 24 ga
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SPME fiber assortment kit 4, for use with autosampler, size 24 ga
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SPME StableFlex fiber assortment kit, needle size 23 ga, StableFlex fiber, for use with autosampler
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SPME fiber assortment kit 1, for use with autosampler, needle size 23 ga
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SPME StableFlex fiber assortment kit, needle size 24 ga, for use with autosampler
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SPME fiber assortment kit 2, for use with autosampler, needle size 23 ga
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SPME fiber assortment kit 4, for use with autosampler, needle size 23 ga
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SPME fiber assortment kit 2, for use with autosampler, size 24 ga
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SPME fiber assortment kit 4, for use with manual holder, size 24 ga
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SPME Fiber Assembly Polydimethylsiloxane/Divinylbenzene (PDMS/DVB), df 65 μm(PDMS/DVB, needle size 24 ga, for use with autosampler
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SPME fiber assembly Carboxen/Polydimethylsiloxane (CAR/PDMS), df 85 μm(CAR/PDMS, needle size 23 ga, StableFlex, for use with autosampler
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