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Assesment of food product by time domain NMR and MRI
Published on Apr 25, 20074832 Views
V predavanju bodo predstavljene napredne preiskave živil z neinvazivnimi metodami jedrske magnetne resonance in slikanja z magnetno resonanco. Predavanje bo s konkretnimi zgledi osredotočeno na preuče
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Chapter list
Assessment of food products by time domain NMR and MRI00:00
Outline01:55
Health foods: composition, structure and appreciation02:51
Structure Property Modelling: Food03:32
NMR and MRI methods04:40
The MRI ‘conflict of interest’05:44
Outline06:20
(Gouda, real Dutch?) Cheese06:37
Water and fat (and proteins) in cheese07:34
(Standard) Spin Echo Imaging: how?10:59
Quantitative amplitude + T2 imaging?11:59
S/N and complexity: imaging vs non-imaging12:43
Imaging mode: gradients in cheese13:19
Water and fat imaging14:02
Increase resolution by combined measurements14:55
A step in the cheese making process: Pressing of curd15:13
T2 imaging or turboSE (RARE)?15:50
Pressing of curd16:35
T2 imaging during pressing17:34
Outline18:38
Background19:02
High quality, fast cooking rice20:06
The MRI ‘conflict of interest’20:34
Fast Spin Echo or Turbo Spin Echo or RARE: time resolution ~ 1 min.20:50
Single slice out of 3D data set as function of cooking time21:18
Partner in Innovation22:56
Description of water uptake classes 23:31
Time Domain NMR 24:06
Time Domain NMR: Rice – comparison of mobility (T2)25:45
Time Domain NMR: Rice – comparison of mobility (T2)26:17
Time Domain NMR: quantification Rice – Liquid to Solid ratio (L/S)26:31
13C CP MAS spectra comparison of rice samples27:56
Outline28:24
Stability of (healthy) snacks (foods On-the-Go)28:46
Time domain NMR: Low moisture content cereal based matrix29:42
Short T2 imaging: how?30:17
MSE and SPI of dry bread (crackers)31:26
Varying TD: short T2 imaging and amplitude32:22
Quantitative SPI mapping: crackers33:06
Quantitative SPI mapping: crackers34:09
Liquid water ingress from agar34:35
Gas phase water ingress: one-sided35:49
Water ingress crackers36:15
Outline36:45
Integrity of plant cell (membranes)36:56
T2 analysis part of scale of onion37:47
Heat treatment: effect of vacuum infiltration by Gd-DTPA solution (T2 ~ 10 ms)40:11
D-T2 correlation plot: part of scale of onion41:42
Simulation: D(?) as function of P42:40
Experiment: Dav vs ? ; permeability43:50
Permeability calculation for restricted diffusion in confined geometry44:59
Region Selection Permeability46:04
Outline46:54
Conclusions 46:58
WNMRC: Spider in Web49:37
slide5650:39
Acknowledgement52:04