Definition. Moyamoya is the Japanese word for âpuff of smokeâ, which is how the tangled blood vessels caused by the blocked arteries at the base of the brain appear on angiography.Moyamoya disease is a rare, progressive cerebrovascular disorder that generally affects children, although it can affect adults.oyamoya is the Japanese word for âpuff of smokeâ, which is how the tangled blood vessels caused by the blocked arteries at the base of the brain appear on angiography.
Antimony trisulfide is a gray solid. It reacts with hydrochloric acid to make hydrogen sulfide and an antimony(III) compound. It dissolves in potassium hydroxide. It burns in air to make antimony(III) oxide and sulfur dioxide. It is a reducing agent. Occurrence. Stibnite is the mineral form of antimony trisulfide. Preparation. Antimony trisulfide is made in the laboratory by reacting any antimony(III) compound with hydrogen sulfide. Uses. Antimony trisulfide is used in cosmetics; in this area it is called kohl. It is used in pyrotechnics to make a glitter effect.
Antimony is a chemical element with symbol Sb (from Latin: stibium) and atomic number 51. A lustrous gray metalloid, it is found in nature mainly as the sulfide mineral stibnite (Sb2S3). Antimony compounds have been known since ancient times and were used for cosmetics; metallic antimony was also known, but it was erroneously identified as lead upon its discovery.