If you use Excel 40 hours a week (and those are the weeks you are on vacation), welcome to the MrExcel channel. Home to 2,400 free Excel tutorials. Bill "MrExcel" Jelen is the author of 67 books about ...
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Science history: First two-way phone call across outdoor lines made by Alexander Graham Bell — Oct. 9, 1876
On Oct. 9, 1876, Alexander Graham Bell made a telephone call to his assistant a few miles away — the first demonstration of ...
Two-dimensional liquid chromatography (2D-LC) improves chromatographic performance, with LCxLC providing extensive ...
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