calculation in food Aw determination for the prediction of food - - PowerPoint PPT Presentation

17/09/11 dominique.thuault@adria.tm.fr

AwDesigner : A software for water activity calculation in food

Aw determination for the prediction of food stability

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Key words: Aw measure, mathematical models, sorption, desorption

17/09/11 dominique.thuault@adria.tm.fr

AwDesigner : A software for water activity calculation in food.

 ADRIA Développement proposes a new software for water activity calculation that will be very useful for every food producers  The main concept is to calculate the water activity thanks to a database and mathematical models.

Our software

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner : A software for water activity calculation in food.

 It will help you to accelerate the product innovation by saving time, money, manpower, and raw materials.

The software will calculate the aw of any product: dairy products, seafood products, cerals food based products, sauces, precooked dishes.

Our software

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner : A software for water activity calculation in food.

– to optimise your formulations in order to meet your safety and quality objectives. – to determine and compare the depressor activities of ingredients. – to formulate products with less salts, sugars and without labelling. – to limit moisture transfer occuring between different components of multi-domain foods. Our software will help you

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner : A software for water activity calculation in food.

 Database: 230 ingredients and additives

– 70 additives (listed in the list of food additives E ...) including the main preservatives, antioxidants, emulsifiers, stabilizers and gelling agents.

What is in the software?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

– 160 ingredients including: different types

• f starch, protein concentrates, fiber,

gum, flour, fat, egg products, spices, natural food products (cereals, fruits, vegetables,)

The software will be constantly enriched, an English version will be available at the end of august 2009.

What is in the software?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 Principles of calculations are based on the study of the hygroscopic properties of individual phases that constitute the food (liquid and solid).  The calculations are based on published models (models of GAB and Ferro-Fontan for the solid phase and models Teng, Roa for the liquid phase).

What is in the software?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

Impact of solutes on aw

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aw

17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

Isotherm for gelatin

0,2 0,4 0,6 0,8 1 1,2 0,2 0,4 0,6 0,8 1

aw teneur en eau (g/g de matière sèche)

valeurs expérimentales modèle

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. experimental data

• model

Moisture of dry matter

17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

Calculation of the aw

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

Aw depressor properties of ingredients

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

Optimization of formula, estimating the amount of salt and sorbitol to be added for a given aw

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 The water activity represents the ratio, from 0 (bone dry) to 1.0 (pure water) of the water vapor pressure of the food to the water vapor pressure of pure water under the same conditions.  Water activity (aw) is an important consideration for food product design and food safety.

What is aw ?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 Water activity can be considered as one of the most important factors in determining quality and safety for food

Why aw must be controlled ?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 Low water activity affects, the microbiological quality, the safety, the shelf life, texture changes in characteristics (such as crispness and crunchiness), flavor, and smell of foods you produce every day…

Why aw must be controlled ?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 For instance, by measuring water activity, it is possible to predict which spoilage and pathogen microorganisms will grow by using predictive microbiology. www.symprevius.org  Managing water activity can increase the stability of food and beverage in time…

Why aw must be controlled ?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 To better meet the nutritionnal requirements of food safety agencies : reduction of salt or sugars content.  To control moisture migration in multi- domain foods.

Why aw must be controlled ?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 Finally, to better answer to consumer demands, it will be useful to control labelling and to remove unessential substances from your production or to substitute some of them with natural ingredients.

Why aw must be controlled ?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

Why aw must be controlled ?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 By adding solutes : sugars, salts, polyols…  By removing water : drying, cooking, baking, smoking are many other ways to modify water activity.

How to modify aw?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 Today , Equipment for aw measuring are available, they must be calibrated.  The precision and the reproductibility of the measure is difficult to obtain.

How to measure aw?

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17/09/11 dominique.thuault@adria.tm.fr

AwDesigner: A software for water activity calculation in food.

 To order it or if you have any question, please do not hesitate to contact Dominique Thuault at ADRIA Developpement.

+33. (0)6.60.02.32.80 Dominique.thuault@adria.tm.fr

Contact

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