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Complaint casebook foreign matter in the United States

Last updated on March 6, 2025.

1.Overview

I found light yellow foreign matter in the United States.

Photos of foreign objects in the United States
Foreign matter in the U.S.

Image of rice starch grains
Rice starch grains

2.Test results

  • Appearance: 13 x 11 x 5 mm in size, 10 x 6 x 6 mm, 6 x 4 x 2 mm in weight, 0.48, 0.23, 0.02 g, light yellow hard solids were recognized.
  • Stereo microscope: It was a small amount of fine powder.
  • Optical Transmission Microscope: I recognized starch grains of rice.
  • Iodine starch reaction: Positive

3.Conclusion

It was estimated that it was a mass of rice bran.

4.Reference

When threshing rice, it is probable that a lump of rice bran attached to the threshing machine grew large, falling off at some point and mixed into white rice.

Published on March 8, 2007

Inquiries to this page

RIKEN, Medical Care Bureau Institute of Hygiene

Phone: 045-370-9451

Phone: 045-370-9451

Fax: 045-370-8462

E-Mail address [email protected]

Return to the previous page

Page ID: 604-536-923

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