Suchergebnisse
Suchergebnisse:
Vor 2 Tagen · Perovskite solar cell. A perovskite solar cell ( PSC) is a type of solar cell that includes a perovskite-structured compound, most commonly a hybrid organic–inorganic lead or tin halide-based material as the light-harvesting active layer. [1] [2] Perovskite materials, such as methylammonium lead halides and all-inorganic cesium lead halide ...
Vor 4 Tagen · It is widely used in organic chemistry as a Lewis acid, for example in the Mukaiyama aldol condensation. In the van Arkel–de Boer process, titanium tetraiodide (TiI 4) is generated in the production of high purity titanium metal. Titanium(III) and titanium(II) also form stable chlorides.
Vor 4 Tagen · v. t. e. Nonmetals are chemical elements that mostly lack distinctive metallic properties. They range from colorless gases like hydrogen to shiny crystals like iodine. Physically, they are usually lighter (less dense) than metals; brittle or crumbly if solid; and often poor conductors of heat and electricity.
Vor 5 Tagen · Organic compounds of phosphorus form a wide class of materials; many are required for life, but some are extremely toxic. Fluorophosphate esters are among the most potent neurotoxins known. A wide range of organophosphorus compounds are used for their toxicity as pesticides ( herbicides , insecticides , fungicides , etc.) and weaponised as nerve agents against enemy humans.
Vor 3 Tagen · Some reports state that Cahn & Hepp or a French chemist called Charles Gerhardt first synthesized paracetamol in 1852. [46] [47] Harmon Northrop Morse synthesized paracetamol at Johns Hopkins University via the reduction of p -nitrophenol with tin in glacial acetic acid in 1877, [143] [144] but it was not until 1887 that clinical pharmacologist Joseph von Mering tried paracetamol on humans. [142]
Vor 2 Tagen · Plastic. Household items made of various types of plastics. Plastics are a wide range of synthetic or semi-synthetic materials that use polymers as a main ingredient. Their plasticity makes it possible for plastics to be molded, extruded or pressed into solid objects of various shapes. This adaptability, plus a wide range of other properties ...
Vor 4 Tagen · Manufacturing LSD requires laboratory equipment and experience in the field of organic chemistry. It takes two to three days to produce 30 to 100 grams of pure compound. It is believed that LSD is not usually produced in large quantities, but rather in a series of small batches. This technique minimizes the loss of precursor chemicals in case a ...
