urea cycle Chromium alloys 2 Chromium hydroxide 2 Dangling bonds 2 Homogeneous precipitation 2 Hydrolysis 2 Hydrotalcites 2 Layered double hydroxides 2 Microwaves 2 Nickel alloys 2 Nickel hydroxide 2 Nucleation 2 Precipitation (chemical) 2 Urea 2 aging 2 article 2 carbon dioxide 2 chemical stress 2 chromium 2 crystal 2 hydrolysis 2 hydroxide 2 hydroxyl group 2 microwave radiation 2 nickel 2 particulate matter 2 polymerization 2 precipitation 2 priority journal 2 synthesis 2