"Pfeffer's solution" meaning in English

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          "ref": "1923, Botanical Gazette, volume 76, page 286",
          "text": "The experiments reported here would seem to permit the following statements bearing on the ultimate cessation of growth of excised root tips in the modified Pfeffer's solution containing 2 per cent glucose.",
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          "ref": "1946, Walter Stiles, Trace Elements in Pants and Animals, page 2",
          "text": "It will be noticed that, in addition to the elements given above, Pfeffer's solution also contains chlorine, while Sachs's solution contains not only chlorine, but sodium.",
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          "ref": "2013, T. Kull, J. Arditti, Orchid Biology VIII: Reviews and Perspectives, page 479",
          "text": "On 14 January 1919 he attempted to germinate seeds of Cattleya mossiae on Pfeffer's solution (Table 7-1) plus 1% sucrose.",
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      "glosses": [
        "A plant nutrient solution consisting of calcium nitrate, potassium nitrate, magnesium sulfate, monopotassium phosphate, potassium chloride, ferric chloride, and water."
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