texture profile analysis a closer look at this popular way of characterising the structure of foods
Download
Skip this Video
Download Presentation
Texture Profile Analysis A closer look at this popular way of characterising the structure of foods

Loading in 2 Seconds...

play fullscreen
1 / 29

texture profile analysis a closer look at this popular way of characterising the structure of foods - PowerPoint PPT Presentation


  • 1066 Views
  • Uploaded on

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

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'texture profile analysis a closer look at this popular way of characterising the structure of foods' - paul


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
tpa the history
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
TPA - The History
  • Malcolm Bourne adapted the Instron to perform TPA and parameters were slightly modified
slide4

TPA (TEXTURE PROFILE ANALYSIS)

  • Known as the “two bite test”
  • Provides textural parameters which correlate well withsensory evaluation parameters
slide5

TPA (TEXTURE PROFILE ANALYSIS)

FIRST BITE

  • Known as the “two bite test”
  • Provides textural parameters which correlate well withsensory evaluation parameters

FORCE

TIME

slide6

TPA (TEXTURE PROFILE ANALYSIS)

SECOND BITE

  • Known as the “two bite test”
  • Provides textural parameters which correlate well withsensory evaluation parameters

FORCE

TIME

slide7

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the Probe

Force

o

Time

slide8

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the PROBE

Force

o

DOWN

Time

‘COMPRESSION’

slide9

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the PROBE

UP

Force

o

Time

‘Decompression’

slide10

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the PROBE

Force

o

Time

DOWN

slide11

TPA (TEXTURE PROFILE ANALYSIS)

Movement of the PROBE

UP

Force

o

Time

slide12

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Fracturability

Force

o

Time

slide13

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

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Hardness 1

Hardness 2

Force

o

Time

slide15

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

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Area 1

Area 2

Force

B

A

o

Time

slide17

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

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

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

B

A

o

Time

slide20

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

Stringiness

o

Time

slide21

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

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Springiness

Force

o

Time

slide23

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

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Springiness

Force

o

Time

slide25

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Work of Adhesion

Force

o

Time

Adhesivness

slide26

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

Definition

The maximum negative force

of the first compression cycle

TPA (TEXTURE PROFILE ANALYSIS)

Analysis of the data

Force

o

Time

Adhesivness

resilience
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
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
ad