Quality of Canadian food-type soybeans 2013
Table of Contents
Canadian generic food-type soybeans
Canadian generic food-type soybeans are used for tofu, soymilk or miso. Mean 100-seed weight for 2013 generic food-type soybean was 16.4 g, which was lower than the mean for 2012 (18.9 g). Water absorption capacity was 1.08 g H2O per g seeds, which was lower than that for 2012. Seed size and water uptake capacity are important quality characteristics of food-type soybeans for the production of tofu, soymilk and miso.
The nitrogen solubility index, which indicates the percentage of water-soluble protein, was 83.1% for generic food-type soybeans in 2013, lower than the indexfor 2012 (86.6%). High nitrogen solubility index is preferred for soymilk and tofu production since soybeans with a high nitrogen solubility index tend to give a high protein recovery when processed into soymilk, which in turn leads to high recovery in the final tofu product.
The mean protein content for 2013 Canadian generic food-type soybean was 42.3 g per 100 g dry matter, which was higher than the mean for 2012 (41.5 g per 100 g dry matter). The mean oil content for 2013 was 20.6 g per 100 g dry matter, which was slightly higher than the mean for 2012 (20.3 g per 100 g dry matter).
The mean sucrose content in 2013 generic food-type soybean was 62.6 g per kg dry matter, which was higher than the mean for 2012 (58.4 g per kg dry matter). The mean total oligosaccharides content was 43.6 g per kg dry matter, which was higher than the mean for 2012 (42.8 g per kg dry matter).
The mean total isoflavones content for 2013 Canadian generic food-type soybean was 2516 mg per kg dry matter, which was higher than the mean for 2012.
Quality data for 2013 Canadian generic food-type soybean compositesFootnote 1
|100-seed weight, g/100 seeds||16.4||18.9|
|Water absorption, g H2O/g seeds||1.08||1.21|
|Nitrogen solubility index (NSI), %||83.1||86.6|
|Chemical composition (g/100 g DM)|
|Sugar content (g/kg DM)|
|Total oligosaccharidesFootnote 2||43.6||42.8|
|Isoflavones (mg/kg DM)|
|Total isoflavonesFootnote 3||2516||2085|
- Footnote 1
Soyean, No. 1 Canada and No. 2 Canada combined.
- Footnote 2
Sum of raffinose, stachyose and verbascose.
- Footnote 3
Sum of isoflavone aglycones (daidzein, genistein and glycitein), glucosides, malonyl glucosides and acetyl glucosides.
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