Science, Том 118John Michels (Journalist) American Association for the Advancement of Science, 1883 Since Jan. 1901 the official proceedings and most of the papers of the American Association for the Advancement of Science have been included in Science. |
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Стр. 26
John Michels (Journalist). The term chemical silica as used in this discussion means silica which is precipitated . The objectives of this paper are to show that chemical silica is present in large quantities in recent marine sediments ...
John Michels (Journalist). The term chemical silica as used in this discussion means silica which is precipitated . The objectives of this paper are to show that chemical silica is present in large quantities in recent marine sediments ...
Стр. 28
... silica than the original rock . Mason ( 10 ) states , " From pH 5-9 the solubility of silica increases con- siderably , but alumina is practically insoluble . Under these conditions , removal of silica can take place , leav- ing alumina ...
... silica than the original rock . Mason ( 10 ) states , " From pH 5-9 the solubility of silica increases con- siderably , but alumina is practically insoluble . Under these conditions , removal of silica can take place , leav- ing alumina ...
Стр. 131
... silica has been discovered . The new silica has not previously been described as the product of synthesis nor has it been discovered in nature as a rock constituent . The conditions needed for the formation of the new dense silica ...
... silica has been discovered . The new silica has not previously been described as the product of synthesis nor has it been discovered in nature as a rock constituent . The conditions needed for the formation of the new dense silica ...
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serodiagnosis of syphilis | 55 |
serum cancer and ion exchange | 114 |
schizophrenic stress and toxicity | 132 |
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