ScienceJohn Michels (Journalist) 1946 |
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Стр. 155
... Material Research Laboratory , Philips Lamps , Ltd. , London , England Another Chain Reaction Katherine Chamberlain Professor of Physics , Wayne. Vol . 103 , No. 2667 Friday , February 8 , 1946 T HE PHENOMENAL INCREASE in the pro ...
... Material Research Laboratory , Philips Lamps , Ltd. , London , England Another Chain Reaction Katherine Chamberlain Professor of Physics , Wayne. Vol . 103 , No. 2667 Friday , February 8 , 1946 T HE PHENOMENAL INCREASE in the pro ...
Стр. 157
... material with the correct particle size in the first place . Below are details of the preparation of three lumi- nescent materials which are suitable examples of the three most important chemical classes : the silicates , the tungstates ...
... material with the correct particle size in the first place . Below are details of the preparation of three lumi- nescent materials which are suitable examples of the three most important chemical classes : the silicates , the tungstates ...
Стр. 614
... material is centrifuged off and discarded . The pH is dropped to 4.0 , and precipitated material is centrifuged off . This precipi- tate can be reworked as many times as is necessary for complete recovery of toxin . To the supernatant ...
... material is centrifuged off and discarded . The pH is dropped to 4.0 , and precipitated material is centrifuged off . This precipi- tate can be reworked as many times as is necessary for complete recovery of toxin . To the supernatant ...
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