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Chemical Reaction Kinetics

Appendix 4.1 Datasets Used for Examples in This Chapter

TABLE A.4.1 Degradation of 1-Methyladenosine in Heated Milk (Figure 4.11)

Heating Time (s)

at 1358C Concentration

(mmol L1)

0 0.41

2 0.38

12 0.36

31.7 0.35

45 0.29

60.1 0.32

70 0.26

128 0.24

156 0.15

Initial Concentration (mmol L1)

Initial Rate (mmol L1s1) at 1358C

0.41 0.011041

0.53 0.014196

0.64 0.01735

0.71 0.019243

1.18 0.031861

1.19 0.032177

2.35 0.063407

5.92 0.159306

Source: From Schlimme E., Ott F.G., and Kiesner C.

Reaction kinetics of the heat-induced formation of N6-methyladenosine in milk. Int Dairy J 4:617–627, 1994.

Note: The author would like to thank Prof. Schlimme for providing the data.

TABLE A.4.2 Nonenzymatic Browning of Whey Powder during Storage (Figure 4.12)

Time (days)

Optical Density Optical Density Exp. 1, 258C Exp. 2, 258C

0 1.8 1.9

30 4.3 4.1

60 6.3 6.1

90 7.4 7.6

120 9.6 9.8

150 12.0 11.8

180 12.5 12.7

210 14.5 14.8

TABLE A.4.2 (continued) Nonenzymatic Browning of Whey Powder during Storage (Figure 4.12) Time (days)

Optical Density Optical Density Exp. 1, 358C Exp. 2, 358C

0 1.7 1.6

10 5.2 5.0

20 7.9 7.9

30 10.6 10.5

40 13.7 13.8

50 16.3 16.5

60 20.2 20.1

70 23.2 23.4

95 27.8 27.7

Optical Density Optical Density

Time (days) Exp. 1, 458C Exp. 2, 458C

0 1.7 1.7

2 5.2 5.2

4 7.1 7.0

7 22.4 22.4

11 25.2 25.3

18 31.7 31.7

28 44.4 44.2

35 50.7 50.9

Source: From Labuza Th.P. Reaction kinetics and accelerated tests. Simulation as a function of temperature. In: Computer Aided Techniques in Food Technology, Vol. I, Saguy (ed.). New York: Marcel Dekker, 1983, pp. 71–115.

TABLE A.4.3 Degradation of Betanin in Aqueous Solution at 758C (Figure 4.13) Time (min)

Betanin mg L1

0 4.29

10 3.65

20 3.04

25 2.83

35 2.30

40 2.20

50 1.83

60 1.49

90 0.96

100 0.70

Source: From Saguy I., Kopelman I.J., and Mizrahi S.

Thermal kinetic degradation of betanin and betalamic acid. J Agric Food Chem 26:360–362, 1978.

TABLE A.4.4 Lysine Loss in Milk Heated at 1608C (Figure 4.14)

Time (s) Lysine (mg L1in Milk)

0 2.93

50 2.62

100 2.40

200 2.12

350 1.98

600 1.54

1000 1.01

1500 0.84

2000 0.62

Source: From Horak F.P. Über die Reaktionskinetik der Sporenabtötung und chemischer Veränderungen bei der thermischen Haltbarmachung von Milch zur Optimierung von Erhitzungsverfahren, PhD thesis.

Technical University of Munich, Germany, 1980.

TABLE A.4.5 Reduction of Hexacyanoferrate (III) ([B]) by Ascorbic Acid ([A]) at Ionic Strength of 0.0384 M (Figure 4.15)

Time ln(A=B)

0

1.02 3.26967

1.87 3.33875

3.05 3.43085

3.96 3.54598

4.98 3.61506

5.99 3.73019

7.12 3.82229

8.03 3.89137

9.1 3.98347

10.06 4.05255

11.19 4.14465

12.15 4.25978

13.22 4.35189

14.08 4.39794

15.2 4.51307

Source: From Watkins K.W. and Olson J.A. Ionic strength effect on the rate of reduction of hexacyanoferrate (III) by ascorbic acid. J Chem Ed 57:158–159, 1980.

TABLE A.4.6 Heat-Induced Denaturation=

Aggregation ofb-Lactoglobulin at 658C (Figure 4.16) Initial Concentration (g L1) Initial Rate

1.485 9.096e-6

Source: From Roefs S.P.F.M. and de Kruif C.G.

A model for the denaturation and aggregation of b-lactoglobulin. Eur J Biochem 226:883–889, 1994.

Note: The author would like to thank Dr. Roefs for supplying the data.

TABLE A.4.7 Degradation of Chlorophyll A at 1158C (Figure 4.17)

Source: From Canjura F.L., Schwarz S.J., and Nunes R.V.

Degradation kinetics of chlorophylls and chlorophyllides.

J Food Sci 56:1639–1643, 1991.

TABLE A.4.8 Sucrose Hydrolysis at 708C and pH 2.5 (Figure 4.18)

Time (min) Sucrose in g L1, exp. 1 Sucrose in g L1, exp. 2

0 0.76 0.76

20 0.72 0.71

30 0.68 0.66

50 0.61 0.59

70 0.55 0.54

85 0.49 0.50

115 0.48 0.44

140 0.37 0.37

175 0.5 0.32

215 0.27 0.26

260 0.22 0.19

320 0.14 0.12

400 0.08 0.07

535 0.03 0.04

Source: From Pinheiro Torres A., Oliveira R., Silva C.L.M., and Fortuna S.P. The influence of pH on the kinetics of acid hydrolysis of sucrose. J Food Process Eng 17:191–208, 1994.

TABLE A.4.9 Effect of pH on Acid Hydrolysis of a Fructo-Oligomer (Figure 4.25) pH

Log (rate) for Raftilose P95

2 1.6

2.6 2

3 2.7

3.5 3

4 3.7

4.2 4

Source: From Blecker C., Fougnies C., van Herck J.C., Chevalier J.P., and Paquot M. Kinetic study of the acid hydrolysis of various oligofructose samples.

J Agric Food Chem 50:1602–1607, 2002.

TABLE A.4.10 Demethylation Kinetics of Aspartame in aqueous solution at 258C (Figure 4.26)

pH Log k1 Log k2 Log k3

0.28 4.96

0.59 5.31

0.91 5.67

1.33 6.15

1.82 6.60

2.25 7.0

5.82 5.96

TABLE A.4.10 (continued) Demethylation Kinetics of Aspartame in aqueous solution at 258C (Figure 4.26) aspartame and L-phenylalanine methyl ester in aqueous solution. Pharm Res 10:1174–1180, 1993.

TABLE A.4.11 Effect of a-Tocopherol on b-Carotene (Figure 4.28)

Tocopherol 7.5mmol dm3 3.8mmol dm3 0mmol dm3

TABLE A.4.11 (continued) Effect of a-Tocopherol on b-Carotene (Figure 4.28)

Source: From Takahashi, A., Shibasaki-Kitakawa, N., and Yonemoto, T., J. Am. Oil Chem. Soc., 80, 1241, 2003.

TABLE A.4.12 Photodecomposition of Riboflavin in Water and Milk Serum (Figure 4.29)

Time (days) Log c=c0in Water

0 2

Time (days) Log c=c0in Milk Serum

0 2

Bibliography and Suggested Further Reading

About Kinetics

Andraos J. A streamlined approach to solving simple and complex kinetic systems analytically. J Chem Ed 76:1578–1583, 1999.

Baird J.K. A generalized statement of the law of mass action. J Chem Ed 76:1146–1150, 1999.

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Croce A.E. The application of the concept of extent of reaction. J Chem Ed 79:506–509, 2002.

TABLE A.4.12 (continued) Photodecomposition of Riboflavin in Water and Milk Serum (Figure 4.29)

Time (days) Log c=c0in Water

2.68 1.15

3.18 1.12

3.39 1.07

3.81 1.05

3.9 0.98

Source: From Toyosaki T., Yamamoto A., and Mineshita T. Kinetics of photolysis of milk riboflavin. Milchwiss 43:

143–146, 1988.

TABLE A.4.13 Photodecomposition of Aspartame (Figure 4.30)

0 lx 1100 lx 3300 lx 5500 lx

Time (days) (30.001 M)

0 1.2 1.2 1.2 1.2

2 1.18 1.18 1.16 1.12

4 1.16 1.14 1.09 1.03

6 1.15 1.13 1.02 0.9

8 1.12 1.1 0.96 0.81

10 1.09 1.04 0.92 0.73

Source: From Kim, S.K., Jung, M.Y., and Kim, S.Y., Food Chem., 59, 273, 1997.

TABLE A.4.14 Photosensitization of Ascorbic Acid by Riboflavin (Figure 4.31)

Riboflavin 0 ppm 1.2 ppm 2.4 ppm 3.6 ppm 6.0 ppm

Time (min) (30.0001 M)

0 1.20 1.20 1.21 1.21 1.20

3 1.18 1.00 0.87 0.74 0.60

6 1.18 0.76 0.50 0.31 0.13

9 1.18 0.54 0.23 0.032 0.02

12 1.17 0.35 0.04 0.003 0

15 1.17 0.22 0.004 0 0

Source: From Jung, M.Y., Kim, S.K., and Kim, S.Y., Food Chem., 53, 397, 1995.

Cvitaš T. A new look at reaction rates. J Chem Ed 76:1574–1577, 1999.

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Ramachandran B.R. and Halpern A.M. A novel experiment in kinetics: The AÐ B ! C reaction system.

J Chem Ed 74:975, 1997.

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About Radical Reactions

Antunes F., Salvador A., Marinho H.S., Alves R., and Pinto R.E. Lipid peroxidation in mitochondrial inner membranes. 1. An integrative kinetic model. Free Radic Biol Med 21:917–943, 1996.

Brimberg U.I. and Kamal-Eldin A. On the kinetics of the autoxidation of fats: Influence of pro-oxidants, antioxidants and synergists. Eur J Lipid Sci Technol 105:83–91, 2003.

Brimberg U.I. and Kamal-Eldin A. On the kinetics of the autoxidation of fats: Substrates with conjugated double bonds. Eur J Lipid Sci Technol 105:17–22, 2003.

Chen B.H., Chen T.M., and Chien J.T. Kinetic model for studying the isomerization of alpha- and beta-carotene during heating and illumination. J Agric Food Chem, 42:2391–2397, 1994.

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Karel M. Kinetics of lipid oxidation. In: Physical Chemistry of Foods, Schwartzberg H.G. and Hartel R.W.

(Eds.), pp. 651–668, New York: Marcel Dekker, 1992.

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Minn D.B. and Boff J.M. Chemistry and reaction of singlet oxygen in foods. Comp Rev Food Sci Food Safety 1:58–72, 2002

Takahashi A., Shibasaki-Kitakawa N., and Yonemoto T. A rigorous kinetic model for b-carotene oxidation in the presence of an antioxidant,a-tocopherol. J Am Oil Chem Soc 80:1241–1247, 2003.

Yanishlieva N.V., Kamal-Eldin A., Marinova E.M., and Toneva A.G. Kinetics of antioxidant action of a-andg-tocopherols in sunflower and soybean triacylglycerols. Eur J Lipid Sci Technol 104:262–270, 2002.

About Photochemistry

Hippler M. Photochemical kinetics: Reaction orders and analogies with molecular beam scattering and cavity ring-down experiments. J Chem Educ 80:1074–1077, 2003.

Jung M.Y., Kim S.K., and Kim S.Y. Riboflavin-sensitized photooxidation of ascorbic acid: Kinetics and amino acid effects. Food Chem 53:397–403, 1995.

Kim S.K., Jung M.Y., and Kim S.Y. Photodecomposition of aspartame in aqueous solutions. Food Chem 59:273–278, 1997.

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Toby S. Does a photochemical reaction have a kinetic order? J Chem Educ 82:37–38, 2005.

About Kinetics and Mass Transport

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New York: John Wiley & Sons Inc., 1999.

General Textbooks

Atkins P.W. Physical Chemistry, 6th edn. Oxford: Oxford University Press, 1999.

Cussler E.L. and Moggridge G.D. Chemical Product Design. Cambridge, UK: Cambridge University Press, 2001.

Damodaran S., Parkin K.L., and Fennema O.R. Fennema’s Food Chemistry, 4th edn. Food Science and Technology, p. 1144. Taylor & Francis, Boca Raton, FL, 2008.

Gardiner W.C. Rates and Mechanisms of Chemical Reactions. New York: WA Benjamin Inc., 1969.

Fennema O.R. (Ed.) Food Chemistry, 3rd edn. New York: Marcel Dekker, 1996.

Hill C.G. An Introduction to Chemical Engineering Kinetics and Reactor Design. New York: John Wiley &

Sons, 1977.

Laidler K.J. Chemical Kinetics, 3rd edn. New York: Harper & Row, 1987.

Marangoni A.G. Enzyme Kinetics. A Modern Approach. Hoboken, NJ: Wiley Interscience, 2003.

Maskill H. The Physical Basis of Organic Chemistry. Oxford: Oxford University Press, 1985.

Moore W.J. Physical Chemistry. London: Longman, 1972.

Olmsted III J. and Williams G.M. Chemistry, the Molecular Science. Dubuque, IA: Wm.C. Brown, 1997.

Raff L.M. Principles of Physical Chemistry. Upper Saddle River, NJ: Prentice-Hall Inc., 2001.

Tinoco T., Sauer K., and Wang J.C. Physical Chemistry: Principles and Applications in Biological Sciences, 3rd edn. Englewood Cliffs, NJ: Prentice-Hall International, 1995.

Sutton R., Rockett B., and Swindells P. Chemistry for the Life Sciences. London: Taylor & Francis, 2000.

Voet D. and Voet J.G. Biochemistry, 2nd edn. New York: Wiley & Sons, 1995.

Walstra P. Physical Chemistry of Foods. New York: Marcel Dekker, 2003.

Westphal G., Buhr H., and Otto H. Reaktionskinetik in Lebensmitteln (Reaction Kinetics in Foods, in German). Berlin: Springer-Verlag, 1996.

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Temperature