chemistry   14931

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Lloyd Erlick / Technical / Processing Fiber Base Prints with Ansel Adams' Odorless and Cheap "Plain Fixer" from Bulk Chemicals
More interesting for its description of the effects of contamination on fixer and prints than for the specific fixer recipe.
fixer  chemistry  printing  photography 
4 days ago by michielbuddingh
Switzerland (Schweiz) | Sigma-Aldrich
Type in Product Names, Product Numbers, or CAS Numbers to see suggestions
searchengine  pharma  chemistry  science  toxic 
7 days ago by gwippich
Synthesis of Ephedrine and Methcathinone from Propionic Acid
Ephedrone [α-Methylaminoethyl Phenyl Ketone (IV)]

A flask fitted with a stirrer, a dropping funnel, a thermometer, and an air inlet tube contained 56.5 g (0.421 mole) of propiophenone and 130 ml of benzene; 67.5 g (0.421 mole) of bromine was added to the mixture at 30?C at such a rate that the bromine became decolorized. If the decolorization of the reaction mixture was slow, air was blown through it to remove the hydrogen bromide formed. After the bromine had been added the solution was stirre...
chemistry 
8 days ago by torrid
The PubChem Project
PubChem homepage, compound, substance, assay, bioassay, pubchem tools, sar
chemistry  essentialoils  aromatherapy  eo 
10 days ago by ingekuijper
Cool, there's water on mars. but does it make good pickles?
Deep under the ice cap of Mars’s southern pole, there could be a store of water, the first stable body of liquid water ever found on the planet. After the paper announcing this discovery came out, reporters described a “lake of liquid water,” about 12 miles in diameter. Hearing that phrase, it’s easy, perhaps even natural, to imagine a bubble of crystal-clear water, hidden under the cap of frozen water and carbon dioxide, pure and sweet and waiting.
But the reality would be less appealing.
mars  astronomy  chemistry  science  space 
15 days ago by terry

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