Abstract SCHIRACK, ANDRIANA VAIS. The Effect of Microwave ...

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detailed description of the sensory characteristics of a sample both in qualitative and quantitative aspects, by a panel consisting of 12-15 members. The trained panel uses a 15-point category scale, which is marked at regular intervals with numbers or words. More extensive training is needed to train the panel in the use of a category scale, but it is a universal scaling technique which can be easily applied to other products. This method is also differentiated by its extensive use of references (Drake and Civille, 2003). A final technique that is also used is Free Choice Profiling. In this method, consumers generate their own terms to describe samples. Although it may be harder to interpret data as a result, the consumers may find novel ways to differentiate products, and the data will also reflect consumers' perception of the product (Murray et al., 2001). Project Objectives Using these techniques of descriptive sensory analysis and chemical techniques such as GC-O and GC-MS, the flavor profile of peanuts can be characterized. Specifically, the off-flavors which may form during high temperature microwave blanching can be linked to their causative chemical compounds. The objectives of this study were to characterize the processing parameters best suited for the microwave blanching of peanuts, to identify the conditions under which the off-flavor occurs, and to analyze this off-flavor using descriptive sensory analysis and chemical analysis. Through this project, the causes of the off-flavor formed 76
during high temperature microwave blanching could be determined and thereby possibly prevented, allowing the adoption of this alternative blanching process. 77
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Abstract SCHIRACK, ANDRIANA VAIS. T
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THE EFFEGT OF MICROWAVE BLANCHING O
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BIOGRAPHY Andriana Schirack is orig
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TABLE OF CONTENTS v Page List of Ta
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Materials and Methods..............
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Table 3 High Impact Aroma-Active Co
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CHAPTER 1: INTRODUCTION 1
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The processing parameters used duri
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educed from 35-40% moisture to 8-10
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REFERENCES Adelsberg GD, Sanders TH
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Interdependency and underlying dime
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Composition of Peanuts The structur
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and Burma. The peanut prices in the
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(w.b.) within 3 days, large quality
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cdry = Specific heat of dry seeds (
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there is no direct correlation publ
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Peanuts are commonly stored in flat
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lanching has been imitated using a
Page 37 and 38: (1999), no detrimental effects of b
Page 39 and 40: when the air is distributed from ab
Page 41 and 42: y-product (Giese, 1992). Drying is
Page 43 and 44: the material to absorb electromagne
Page 45 and 46: ε' = Relative real permittivity (d
Page 47 and 48: oils, both ε' and ε" are low and
Page 49 and 50: 1969). The flavor characteristics o
Page 51 and 52: et al., 1980). Likewise, sugars pre
Page 53 and 54: n-methylpyrrole. Walradt et al. (19
Page 55 and 56: fact, Ory et al. (1992) suggested t
Page 57 and 58: Flavor Research in Other Nuts Sever
Page 59 and 60: changed with time of roasting and i
Page 61 and 62: polyunsaturated acids that have a c
Page 63 and 64: hexanal are intensified to the high
Page 65 and 66: The results of temperature stress i
Page 67 and 68: Brown et al. (1977) found that the
Page 69 and 70: exhibited the fruity fermented off-
Page 71 and 72: (Pawliszyn, 2000). Also, the elevat
Page 73 and 74: compounds eluting from microwave-he
Page 75 and 76: Table 1: Peanut Volatile Analysis b
Page 77 and 78: the identification of volatile comp
Page 79 and 80: the detector. The compounds can the
Page 81 and 82: GC-O Applications High vacuum disti
Page 83 and 84: each half was allocated into one of
Page 85 and 86: Woody/Hulls/Skins Cardboard Table 2
Page 87: Givaudan-Roure developed Quantitati
Page 91 and 92: OVM Organic volatiles meter Pa Pasc
Page 93 and 94: References Abegaz EG, Kerr WL, Koeh
Page 95 and 96: odorants in high temperature cured
Page 97 and 98: 17(4): 728-732. Mason ME, Waller GR
Page 99 and 100: partitioning constants and release
Page 101 and 102: Vercellotti JR, Crippen KL, Lovegre
Page 103 and 104: ABSTRACT Peanut blanching consists
Page 105 and 106: peanut moisture content from 5.5 to
Page 107 and 108: The computer monitored power output
Page 109 and 110: RESULTS AND DISCUSSION Energy Absor
Page 111 and 112: All treatments using the fan (F) ha
Page 113 and 114: Treatments 11NF, 8NF, and 5NF also
Page 115 and 116: lanchabilities as well as a longer
Page 117 and 118: microwave attain much higher temper
Page 119 and 120: REFERENCES ADELSBERG, G.D. and SAND
Page 121 and 122: TABLES AND FIGURES Table 1: Process
Page 123 and 124: Energy absorbed (kJ) 3000 2500 2000
Page 125 and 126: Temperature of peanuts (°C) 160 14
Page 127 and 128: Percent blanchability 100 90 80 70
Page 129 and 130: Maximum internal temperature (°C)
Page 131 and 132: ABSTRACT Microwave blanching of pea
Page 133 and 134: Several methods are used for blanch
Page 135 and 136: Peanuts MATERIALS AND METHODS Mediu
Page 137 and 138: Canada) on a laptop computer (Dell
Page 139 and 140:
Sensory Analysis RESULTS AND DISCUS
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significantly lower final moisture
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ACKNOWLEDGMENTS Funded in part by t
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Foods and Beverages, Vol. 29, (G. C
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TABLE LEGENDS Table 1. Microwave ap
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TABLE 2. LEXICON OF PEANUT FLAVOR D
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Sweet Aromatic TABLE 4. CORRELATION
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CHAPTER 5: CHARACTERIZATION OF AROM
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Introduction The most common use of
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The objective of this study was to
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attributes which were different fro
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Volatile compounds from the solvent
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0.25 μm df; J & W Scientific, Fols
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adjusted with the same concentratio
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characterized by the attributes of
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(E,E)-2,4-decadienal (fried/oxidize
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flavor dilution factors, nor did th
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that of the control, but only in th
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e high enough for pyrazine formatio
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sensory panelists analyzing process
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References (ASTM) American Society
Page 181 and 182:
Megahed MG. 2001. Microwave roastin
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Vercellotti JR, Mills OE, Bett KL,
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Table 2- Model system concentration
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28 4-acetoxy-2,5-dimethyl- 3(2H)-fu
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Table 5 - Quantification, sensory o
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Conclusions This research investiga
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microwave technology may provide ma
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protect against colon, prostate, an
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APPENDICES 185
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SAFE (3 SAFE's can be done in 1 day
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2. Turn off waterbath. 3. Turn off
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5. Filter through a third sodium su
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contamination, and run a blank on t
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AC nutty/burnt 975 1.5 NB cabbage/g
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AC oxidized 1289 1.5 NB dusty/nutty
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NB brothy 1612 3.5 NB honey/hay 161
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Table 2: Aroma-Active Compounds in
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AC cedar 1081 3.0 AC burnt sugar/nu
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AC brothy 1350 2.0 NB garlic 1352 5
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NB fruity/floral 1670 3.0 NB rosy 1
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