Texture profile analysis a closer look at this popular way of characterising the structure of foods l.jpg
This presentation is the property of its rightful owner.
Sponsored Links
1 / 29

Texture Profile Analysis A closer look at this popular way of characterising the structure of foods PowerPoint PPT Presentation


  • 942 Views
  • Uploaded on
  • Presentation posted in: General

Texture Profile Analysis A closer look at this popular way of characterising the structure of foods. TPA - The History. General Foods texturometer developed Force/time plot became known as a texture profile

Download Presentation

Texture Profile Analysis A closer look at this popular way of characterising the structure of foods

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Texture profile analysis a closer look at this popular way of characterising the structure of foods l.jpg

Texture Profile AnalysisA closer look at this popularway of characterising thestructure of foods


Tpa the history l.jpg

TPA - The History

  • General Foods texturometer developed

    • Force/time plot became known as a texture profile

  • Szczesniak defined specific terms which correlated well with sensory panel scores - texture profile analysis

    • 7 parameters were listed; 5 measured and 2 calculated


Tpa the history3 l.jpg

TPA - The History

  • Malcolm Bourne adapted the Instron to perform TPA and parameters were slightly modified


Slide4 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

  • Known as the “two bite test”

  • Provides textural parameters which correlate well withsensory evaluation parameters


Slide5 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

FIRST BITE

  • Known as the “two bite test”

  • Provides textural parameters which correlate well withsensory evaluation parameters

FORCE

TIME


Slide6 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

SECOND BITE

  • Known as the “two bite test”

  • Provides textural parameters which correlate well withsensory evaluation parameters

FORCE

TIME


Slide7 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the Probe

Force

o

Time


Slide8 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the PROBE

Force

o

DOWN

Time

‘COMPRESSION’


Slide9 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the PROBE

UP

Force

o

Time

‘Decompression’


Slide10 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the PROBE

Force

o

Time

DOWN


Slide11 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the PROBE

UP

Force

o

Time


Slide12 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Fracturability

Force

o

Time


Slide13 l.jpg

Definition

The force at which there is

the first significant break in

the curve (originally called

the brittleness)

NB - Not always present

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Fracturability

Force

o

Time


Slide14 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Hardness 1

Hardness 2

Force

o

Time


Slide15 l.jpg

Definition

The maximum force during

the first cycle of compression.

Is also known as the

“firmness”.

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Hardness

Hardness 2

Force

o

Time


Slide16 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Area 1

Area 2

Force

B

A

o

Time


Slide17 l.jpg

Definition

The ratio of the positive force

area during the second cycle

of compression to that of the

first cycle.

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

B

A

o

Time


Slide18 l.jpg

Definition

The ratio of the positive force

area during the second cycle

of compression to that of the

first cycle.

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

B

A

o

Time


Slide19 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

B

A

o

Time


Slide20 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

Stringiness

o

Time


Slide21 l.jpg

Note

Defined as the distance that the

product is extended during de-

compression before separating

from the probe.

Not an original TPA parameter

and is not included in the TPA

analysis macro at this point.

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

Stringiness

o

Time


Slide22 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Springiness

Force

o

Time


Slide23 l.jpg

Definition

The height that the food

recovers during the time that

elapses between the end of the

first cycle and the start of the

second cycle.

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Springiness

Force

o

Time


Slide24 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Springiness

Force

o

Time


Slide25 l.jpg

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Work of Adhesion

Force

o

Time

Adhesivness


Slide26 l.jpg

Definition

The negative area for

the first compression cycle -

representing the work needed

to overcome the attractive

forces between the surfaces of

the probe and the food.

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Work of Adhesion

Force

o

Time


Slide27 l.jpg

Definition

The maximum negative force

of the first compression cycle

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

o

Time

Adhesivness


Resilience l.jpg

Resilience

  • Not an original TPA parameter.

  • Developed from looking closely at elastic recovery

  • A measurement of how the sample recovers from deformation.

  • Ratio of the first UP ( decompression) stroke to the first DOWN ( compression) stroke


Initial modulus l.jpg

Initial Modulus

  • Not an original Texture Profile Analysis parameter

  • Developed from looking closer at curve before fracture

  • Initial Modulus = Initial Stress / Initial Strain

  • Initial Stress:taken as mean force from 0.5 -1.5secs and then dividing by the Contact Area

  • Initial Strain:calculated at the 1.5 second point


  • Login