| 1 | I let the silver nitrate react with pieces of brain hardened in potassium dichromate. | |
| 2 | Ginkgo may also help control the transformation of cholesterol to plaque associated with the hardening of arteries, and can relax constricted blood vessels. | |
| 3 | Restricted blood flow caused by diabetes and atherosclerosis - hardening of the arteries - can cause erectile dysfunction. | |
| 4 | Via a proprietary technique, the researchers turn waste cooking oil into a liquid polymer, which hardens after application. | |
| 5 | Patients with autoimmune diseases such as lupus and multiple sclerosis should be particularly careful, he says. |
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