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In philately, the Higgins & Gage World Postal Stationery Catalog is the most recent encyclopedic catalogue of postal stationery covering the whole world. Despite most volumes not having been updated for over thirty years, the catalogue and the H & G numbering system are still widely used by philatelists and stamp dealers although the values given in the catalogue are out of date.
The first catalog, the 400 page Scientific Materials Co. Catalog of Laboratory Apparatus & Supplies, was published in 1904. Fisher established an R&D lab at his company in 1915. Edwin Fisher, Chester's brother, developed the Meker-Fisher burner in 1921, an advancement on the design of the Bunsen burner. [2]
Thermo Fisher Scientific's previous headquarters in Waltham, Massachusetts Thermo Fisher Scientific office in Canada. Thermo Fisher Scientific Inc. is an American life, science and clinical research company.
The Standard Catalog of World Paper Money was a well-known catalogue of banknotes that was published by Krause Publications in three volumes. These catalogues are commonly known in the numismatic trade as the Pick catalogues, as the numbering system was originally compiled by Albert Pick, but are also referred to as "Krause" or "SCWPM".
Ammonium heptamolybdate is the inorganic compound whose chemical formula is (NH 4) 6 Mo 7 O 24, normally encountered as the tetrahydrate.A dihydrate is also known. It is a colorless solid, often referred to as ammonium paramolybdate or simply as ammonium molybdate, although "ammonium molybdate" can also refer to ammonium orthomolybdate, (NH 4) 2 MoO 4, and several other compounds.
Nessler's reagent, named after Julius Neßler (Nessler), is a 0.09 mol/L solution of potassium tetraiodomercurate(II) in 2.5 mol/L potassium hydroxide.This pale solution becomes deeper yellow in the presence of ammonia (NH 3).
Bromocresol green (BCG) is a dye of the triphenylmethane family (triarylmethane dyes).It belongs to a class of dyes called sulfonephthaleins. [4] It is used as a pH indicator in applications such as growth mediums for microorganisms and titrations.
Giemsa stained Trypanosoma parasites (Chagas disease pathogen) Whirling disease section stained with Giemsa stain. Giemsa stain (/ ˈ ɡ iː m z ə /), named after German chemist and bacteriologist Gustav Giemsa, is a nucleic acid stain used in cytogenetics and for the histopathological diagnosis of malaria and other parasites.