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Laboratory synthesized sulfanilamide. Sulfanilamide is a yellowish-white or white crystal or fine powder. It has a density of 1.08 g/cm 3 and a melting point of 164.5-166.5 °C. The pH of a 0.5% aqueous solution of Sulfanilamide is 5.8 to 6.1. It has a λ max of 255 and 312 nm. [5]
Harvesting of cork from the forests of Algeria, 1930. Cork is a natural material used by humans for over 5,000 years. It is a material whose applications have been known since antiquity, especially in floating devices and as stopper for beverages, mainly wine, whose market, from the early twentieth century, had a massive expansion, particularly due to the development of several cork-based ...
Skeletal structural formula of Vitamin B 12.Many organic molecules are too complicated to be specified by a molecular formula.. The structural formula of a chemical compound is a graphic representation of the molecular structure (determined by structural chemistry methods), showing how the atoms are connected to one another. [1]
At least 3 corners of every polyhedra must be shared, creating a continuous random network. All of these rules provide the correct amount of flexibility to form a glass and not a crystal. While these rules only apply to oxide glasses, they were the first rules to establish the idea of a continuous random network for glass structure.
In this example, the reactants are aniline, triethylamine (Et 3 N, Et = ethyl group), and iodine. Sulfur dioxide is believed to be activated through a series of intermediates: Et 3 N− + −I −, Et 3 N−I + −I − 3 and Et 3 N + −SO − 2. The sulfamide functional group is an increasingly common structural feature used in medicinal ...
Another widely available Nalgene Outdoor product is a 650 ml (22 fl oz) "All-Terrain" or "bike" bottle. The bottle is made from low-density polyethylene (LDPE), and its screw top has two moving parts — a drinking nozzle that seals until snapped open by pulling on it, and a hinged polycarbonate dome, that when closed both snaps the nozzle ...
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