Chemical News and Journal of Industrial Science, Tomy 105-106Chemical news office., 1912 |
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Strona 6
... extract of soils always contains some organic matter . In consequence organic compounds have always to be considered as a portion of the material in the nutrient solution supplied to crops growing in the soil . The chief function of ...
... extract of soils always contains some organic matter . In consequence organic compounds have always to be considered as a portion of the material in the nutrient solution supplied to crops growing in the soil . The chief function of ...
Strona 7
... extraction . The alkali used was dilute , 2 per cent , the treatment was at room tem- perature and for a short time only , and the compounds isolated are not known to be formed by decomposition of more complex organic material by any ...
... extraction . The alkali used was dilute , 2 per cent , the treatment was at room tem- perature and for a short time only , and the compounds isolated are not known to be formed by decomposition of more complex organic material by any ...
Strona 16
... extract , from which on cooling a light yellow micro - crystalline body separates . This material was separated by ... Extraction of this with boiling petroleum ether yielded a light coloured solution , which after removal of the ...
... extract , from which on cooling a light yellow micro - crystalline body separates . This material was separated by ... Extraction of this with boiling petroleum ether yielded a light coloured solution , which after removal of the ...
Strona 17
... extract of a soil obtained by extraction with dilute alkali is acidified , a brown or black flocculent precipitate of the so - called humus bodies is formed . If this precipitate is separated by filtration , washed , and treated while ...
... extract of a soil obtained by extraction with dilute alkali is acidified , a brown or black flocculent precipitate of the so - called humus bodies is formed . If this precipitate is separated by filtration , washed , and treated while ...
Strona 25
... extract ( after benzene ) of the over- ground parts of a willow - herb ( Epilobium ) , viz . , with iron salts a blue - black precipitate , with ammonia a yellow colour with scarlet streaks to a brown - yellow liquid , with lime- water ...
... extract ( after benzene ) of the over- ground parts of a willow - herb ( Epilobium ) , viz . , with iron salts a blue - black precipitate , with ammonia a yellow colour with scarlet streaks to a brown - yellow liquid , with lime- water ...
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