Water Chestnuts have a high starch content/ Was Re: question about a legal/illegal

[Guest guest]

Hi Donna,

Here is an article about water chestnuts. The article indicates that

the amylose content of water chestnuts is 29%. Amylose starch is less

readily digested than amylopectin.

http://en.wikipedia.org/wiki/Amylose

Mimi

http://www.blackwell-synergy.com/doi/abs/10.1111/j.1745-4514.2005.00010.x?cookie\

Set=1 & journalCode=jfbc

Journal of Food Biochemistry

Volume 29 Issue 4 Page 337 - August 2005

doi:10.1111/j.1745-4514.2005.00010.x

Volume 29 Issue 4

CHARACTERISTICS OF STARCH FROM WATER CHESTNUT (TRAPA BISPINOSA ROXB.)

VANNA TULYATHAN1*, KHAJEE BOONDEE1 and THANACHAN MAHAWANICH1

ABSTRACT

The physicochemical properties of the starch extracted from krajub

(Trapa bispinosa Roxb.) were investigated. Scanning electron

microscopy of the starch granules showed that they were either oval or

round in shape with small horn(s) protruding from the surface. Amylose

content of the krajub starch was 29.62% (dry weight basis [dwb]). The

pasting temperatures of 6–8% starch suspension were 81–83C. Brabender

amylogram showed no peak viscosity and very low breakdown, indicating

high heat and shear stability of the starch suspension. The starch

pastes highly retrograded and formed an opaque gel. The X-ray

diffraction patterns of the starch revealed a C-type crystallite. The

starch granules were more resistant to acid hydrolysis (2.2 N HCl at

ambient temperature) than mung bean starch (C-type crystallite).

> and can anyone tell me why waterchestnuts are illegal?

[Guest guest]

Here is an article that proves Elaine is right and Wiki is wrong!

The Journal of Nutrition Vol. 127 No. 7 July 1997, pp. 1349-1356

Copyright ©1997 by the American Society for Nutritional Sciences

Soluble Amylose Cornstarch Is More Digestible than Soluble Amylopectin Potato

Starch in Rats

http://jn.nutrition.org/cgi/content/full/127/7/1349

Mimi