Mathews, 1898, p. 546; Simon, 1895, p. 55 «The experiments of Schunk were fully confirmed by Hoppe-Seyler (Virchow's Archiv, 1863, vol. xxvii. pp. 388-392) in 1863, who demonstrated the constant presence of indican in over a hundred human urines, and also in such of carnivora and herbivora. Its formation Hoppe-Seyler regards as a probable function of the kidneys, since in his examinations of the spleen, liver, pancreas, muscles, blood, and kidneys traces were only found in the latter organs».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.Simon, Charles E. (1895). «The Modern Aspect of Indicanuria». En Edward P.Davis, ed. The American Journal of the Medical Sciences(en inglés) (Philadelphia: Lea Brothers & Co.) 110: 48-63. ISSN0002-9629.
Mathews, 1898, pp. 545-546 «In 1865 he made the not unimportant discovery that gypsum, heated with sodium chloride to 130ºC., was converted into the crystalline anhydride».; Cameron y Bell, 1906, p. 18 «The changes which gypsum undergoes at higher temperatures in sealed tubes have been investigated by Hoppe-Seyler, who found that gypsum changes to the hemihydrate at 140° C, and in the presence of a saturated solution of sodium chloride the change takes place at the lower temperature of 125°. Solutions of calcium chloride also reduce the temperature at which the transformation takes place. Under all circumstances the hemihydrate spontaneously changed rather readily into one of the anhydrous forms».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.Cameron, Frank Kenneth; Bell, James Munsie (1906). Calcium sulphate in aqueous solutions: a contribution to the study of alkali deposits(en inglés). Washington: Government Printing Office.
Mathews, 1898, p. 545; Atkinson, 1898, p. 811 «It was about the year 1866 that Hoppe Seyler, while engaged in the analysis of wolframite from Zinnwald, discovered that indium was present in it. He obtained 0.028 gram of indium from 122.6 grams of the mineral. He believed that as the latter contained zinc, the indium was probably present in the zinc blende, inasmuch as the quantity of indium found by him was not very much greater tan the contained in Freibert zinc blende».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.Atkinson, Elizabeth Allen (octubre de 1898). «I. Metal Separation by Means of Hydrobromic Acid Gas. II Indium in Tungsten Minerals». Journal of the American Chemical Society(en inglés) (American Chemical Society) 20 (10): 797-813. ISSN0002-7863. doi:10.1021/ja02072a014.
Mathews, 1898, p. 551; Willstätter y Stoll, 1928, pp. 3, 229; Johnson, 1890, p. 125 «Chlorophyllan, obtained by Hoppe-Seyler from grass, separates from its solution in hot alcohol in characteristic acicular crystals which are brown to transmitted light, and in reflected light are blackish green, with a velvety, somewhat metallic lustre. This substance has the consistence of beeswax, adheres firmly to glass, and at about 230" melts to a brilliant black liquid. The crystallized chlorophyllan has a composition as follows: Carbon 73.36, Hydrogen 9.72, Nitrogen 5.68, Phosphorus 1.38, Magnesium 0.34, Oxygen 9.52. Chlorophyllan is chemically distinct from chlorophyl, as proved by its optical properties, but in what the difference consists is not understood. Boiling alkali decomposes it with formation of chlorophyllanic acid that may be obtained in blue-black crystals, and at the same time glycerophosphoric acid and cholin, the decompositionproducts of lecithin, are produced. Tschirch found that chlorophyllan, by treatment with zinc oxide, yields a substance whose optical properties lead to the belief that it is identical with the chlorophyl that occurs in the living plant. It was obtained as a dark-green powder, but its exact chemical composition is not known».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.——; Stoll, Arthur (1928). Investigations on Chlorophyll: Methods and Results(en inglés). traducido por Frank Milton Schertz y Albert Ronald Merz. Science Press Printing Company. Archivado desde el original el 18 de mayo de 2015. Consultado el 10 de mayo de 2015.Johnson, Samuel W. (1890). How crops grow. A treatise on the chemical composition, structure and life of the plant, for students of agriculture. With numerous illustrations and tables of analyses(en inglés). New York: Orange Judd Company. doi:10.5962/bhl.title.40419.
Mathews, 1898, p. 551; Willstätter y Stoll, 1928, pp. 3, 229; Johnson, 1890, p. 125 «Chlorophyllan, obtained by Hoppe-Seyler from grass, separates from its solution in hot alcohol in characteristic acicular crystals which are brown to transmitted light, and in reflected light are blackish green, with a velvety, somewhat metallic lustre. This substance has the consistence of beeswax, adheres firmly to glass, and at about 230" melts to a brilliant black liquid. The crystallized chlorophyllan has a composition as follows: Carbon 73.36, Hydrogen 9.72, Nitrogen 5.68, Phosphorus 1.38, Magnesium 0.34, Oxygen 9.52. Chlorophyllan is chemically distinct from chlorophyl, as proved by its optical properties, but in what the difference consists is not understood. Boiling alkali decomposes it with formation of chlorophyllanic acid that may be obtained in blue-black crystals, and at the same time glycerophosphoric acid and cholin, the decompositionproducts of lecithin, are produced. Tschirch found that chlorophyllan, by treatment with zinc oxide, yields a substance whose optical properties lead to the belief that it is identical with the chlorophyl that occurs in the living plant. It was obtained as a dark-green powder, but its exact chemical composition is not known».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.——; Stoll, Arthur (1928). Investigations on Chlorophyll: Methods and Results(en inglés). traducido por Frank Milton Schertz y Albert Ronald Merz. Science Press Printing Company. Archivado desde el original el 18 de mayo de 2015. Consultado el 10 de mayo de 2015.Johnson, Samuel W. (1890). How crops grow. A treatise on the chemical composition, structure and life of the plant, for students of agriculture. With numerous illustrations and tables of analyses(en inglés). New York: Orange Judd Company. doi:10.5962/bhl.title.40419.
Evered, 1988, p. 229. Evered, Derek F. (octubre de 1888). «Felix Hoppe-Seyler's Handbuch der Physiologisch und Pathologisch-Chemischen Analyse für Aerzte und Studierende (8th Edition) Revised by H Thierfelder. pp 854. Publisher: Hirschwald, Berlin. 1909». Biochemical Education(en inglés) (International Union of Biochemistry and Molecular Biology) 16 (4): 229. ISSN1539-3429. doi:10.1016/0307-4412(88)90134-3.
Evered, 1988, p. 229; Hoppe, 1858. Evered, Derek F. (octubre de 1888). «Felix Hoppe-Seyler's Handbuch der Physiologisch und Pathologisch-Chemischen Analyse für Aerzte und Studierende (8th Edition) Revised by H Thierfelder. pp 854. Publisher: Hirschwald, Berlin. 1909». Biochemical Education(en inglés) (International Union of Biochemistry and Molecular Biology) 16 (4): 229. ISSN1539-3429. doi:10.1016/0307-4412(88)90134-3.Hoppe, Felix (1858). Anleitung zur pathologisch-chemischen Analyse für Aerzte und Studirende(en alemán) (1ª edición). Berlín: A. Hirschwald.
Hoppe-Seyler, 1864, p. 233; Giegé, 2013, pp. 6457, 6485. Hoppe-Seyler, Felix (1864). «Ueber die chemischen und optischen Eigenschaften des Blutfarbstoffs». Archiv für pathologische Anatomie und Physiologie und für klinische Medicin(en alemán)29 (1-2): 233-235. ISSN1432-2307.Giegé, Richard (diciembre de 2013). «A historical perspective on protein crystallization from 1840 to the present day». FEBS Journal(en inglés) (Wiley-Blackwell) 280 (24): 6456-6497. ISSN1742-4658. doi:10.1111/febs.12580.
Mathews, 1898, p. 545; Atkinson, 1898, p. 811 «It was about the year 1866 that Hoppe Seyler, while engaged in the analysis of wolframite from Zinnwald, discovered that indium was present in it. He obtained 0.028 gram of indium from 122.6 grams of the mineral. He believed that as the latter contained zinc, the indium was probably present in the zinc blende, inasmuch as the quantity of indium found by him was not very much greater tan the contained in Freibert zinc blende».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.Atkinson, Elizabeth Allen (octubre de 1898). «I. Metal Separation by Means of Hydrobromic Acid Gas. II Indium in Tungsten Minerals». Journal of the American Chemical Society(en inglés) (American Chemical Society) 20 (10): 797-813. ISSN0002-7863. doi:10.1021/ja02072a014.
Mathews, 1898, p. 551; Willstätter y Stoll, 1928, pp. 3, 229; Johnson, 1890, p. 125 «Chlorophyllan, obtained by Hoppe-Seyler from grass, separates from its solution in hot alcohol in characteristic acicular crystals which are brown to transmitted light, and in reflected light are blackish green, with a velvety, somewhat metallic lustre. This substance has the consistence of beeswax, adheres firmly to glass, and at about 230" melts to a brilliant black liquid. The crystallized chlorophyllan has a composition as follows: Carbon 73.36, Hydrogen 9.72, Nitrogen 5.68, Phosphorus 1.38, Magnesium 0.34, Oxygen 9.52. Chlorophyllan is chemically distinct from chlorophyl, as proved by its optical properties, but in what the difference consists is not understood. Boiling alkali decomposes it with formation of chlorophyllanic acid that may be obtained in blue-black crystals, and at the same time glycerophosphoric acid and cholin, the decompositionproducts of lecithin, are produced. Tschirch found that chlorophyllan, by treatment with zinc oxide, yields a substance whose optical properties lead to the belief that it is identical with the chlorophyl that occurs in the living plant. It was obtained as a dark-green powder, but its exact chemical composition is not known».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.——; Stoll, Arthur (1928). Investigations on Chlorophyll: Methods and Results(en inglés). traducido por Frank Milton Schertz y Albert Ronald Merz. Science Press Printing Company. Archivado desde el original el 18 de mayo de 2015. Consultado el 10 de mayo de 2015.Johnson, Samuel W. (1890). How crops grow. A treatise on the chemical composition, structure and life of the plant, for students of agriculture. With numerous illustrations and tables of analyses(en inglés). New York: Orange Judd Company. doi:10.5962/bhl.title.40419.
Mathews, 1898, p. 551; Willstätter y Stoll, 1928, pp. 3, 229; Johnson, 1890, p. 125 «Chlorophyllan, obtained by Hoppe-Seyler from grass, separates from its solution in hot alcohol in characteristic acicular crystals which are brown to transmitted light, and in reflected light are blackish green, with a velvety, somewhat metallic lustre. This substance has the consistence of beeswax, adheres firmly to glass, and at about 230" melts to a brilliant black liquid. The crystallized chlorophyllan has a composition as follows: Carbon 73.36, Hydrogen 9.72, Nitrogen 5.68, Phosphorus 1.38, Magnesium 0.34, Oxygen 9.52. Chlorophyllan is chemically distinct from chlorophyl, as proved by its optical properties, but in what the difference consists is not understood. Boiling alkali decomposes it with formation of chlorophyllanic acid that may be obtained in blue-black crystals, and at the same time glycerophosphoric acid and cholin, the decompositionproducts of lecithin, are produced. Tschirch found that chlorophyllan, by treatment with zinc oxide, yields a substance whose optical properties lead to the belief that it is identical with the chlorophyl that occurs in the living plant. It was obtained as a dark-green powder, but its exact chemical composition is not known».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.——; Stoll, Arthur (1928). Investigations on Chlorophyll: Methods and Results(en inglés). traducido por Frank Milton Schertz y Albert Ronald Merz. Science Press Printing Company. Archivado desde el original el 18 de mayo de 2015. Consultado el 10 de mayo de 2015.Johnson, Samuel W. (1890). How crops grow. A treatise on the chemical composition, structure and life of the plant, for students of agriculture. With numerous illustrations and tables of analyses(en inglés). New York: Orange Judd Company. doi:10.5962/bhl.title.40419.
Evered, 1988, p. 229; Hoppe, 1858. Evered, Derek F. (octubre de 1888). «Felix Hoppe-Seyler's Handbuch der Physiologisch und Pathologisch-Chemischen Analyse für Aerzte und Studierende (8th Edition) Revised by H Thierfelder. pp 854. Publisher: Hirschwald, Berlin. 1909». Biochemical Education(en inglés) (International Union of Biochemistry and Molecular Biology) 16 (4): 229. ISSN1539-3429. doi:10.1016/0307-4412(88)90134-3.Hoppe, Felix (1858). Anleitung zur pathologisch-chemischen Analyse für Aerzte und Studirende(en alemán) (1ª edición). Berlín: A. Hirschwald.
Evered, 1988, p. 229. Evered, Derek F. (octubre de 1888). «Felix Hoppe-Seyler's Handbuch der Physiologisch und Pathologisch-Chemischen Analyse für Aerzte und Studierende (8th Edition) Revised by H Thierfelder. pp 854. Publisher: Hirschwald, Berlin. 1909». Biochemical Education(en inglés) (International Union of Biochemistry and Molecular Biology) 16 (4): 229. ISSN1539-3429. doi:10.1016/0307-4412(88)90134-3.
Evered, 1988, p. 229; Hoppe, 1858. Evered, Derek F. (octubre de 1888). «Felix Hoppe-Seyler's Handbuch der Physiologisch und Pathologisch-Chemischen Analyse für Aerzte und Studierende (8th Edition) Revised by H Thierfelder. pp 854. Publisher: Hirschwald, Berlin. 1909». Biochemical Education(en inglés) (International Union of Biochemistry and Molecular Biology) 16 (4): 229. ISSN1539-3429. doi:10.1016/0307-4412(88)90134-3.Hoppe, Felix (1858). Anleitung zur pathologisch-chemischen Analyse für Aerzte und Studirende(en alemán) (1ª edición). Berlín: A. Hirschwald.
Mathews, 1898, p. 546; Simon, 1895, p. 55 «The experiments of Schunk were fully confirmed by Hoppe-Seyler (Virchow's Archiv, 1863, vol. xxvii. pp. 388-392) in 1863, who demonstrated the constant presence of indican in over a hundred human urines, and also in such of carnivora and herbivora. Its formation Hoppe-Seyler regards as a probable function of the kidneys, since in his examinations of the spleen, liver, pancreas, muscles, blood, and kidneys traces were only found in the latter organs».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.Simon, Charles E. (1895). «The Modern Aspect of Indicanuria». En Edward P.Davis, ed. The American Journal of the Medical Sciences(en inglés) (Philadelphia: Lea Brothers & Co.) 110: 48-63. ISSN0002-9629.
Hoppe-Seyler, 1864, p. 233; Giegé, 2013, pp. 6457, 6485. Hoppe-Seyler, Felix (1864). «Ueber die chemischen und optischen Eigenschaften des Blutfarbstoffs». Archiv für pathologische Anatomie und Physiologie und für klinische Medicin(en alemán)29 (1-2): 233-235. ISSN1432-2307.Giegé, Richard (diciembre de 2013). «A historical perspective on protein crystallization from 1840 to the present day». FEBS Journal(en inglés) (Wiley-Blackwell) 280 (24): 6456-6497. ISSN1742-4658. doi:10.1111/febs.12580.
Mathews, 1898, p. 545; Atkinson, 1898, p. 811 «It was about the year 1866 that Hoppe Seyler, while engaged in the analysis of wolframite from Zinnwald, discovered that indium was present in it. He obtained 0.028 gram of indium from 122.6 grams of the mineral. He believed that as the latter contained zinc, the indium was probably present in the zinc blende, inasmuch as the quantity of indium found by him was not very much greater tan the contained in Freibert zinc blende».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.Atkinson, Elizabeth Allen (octubre de 1898). «I. Metal Separation by Means of Hydrobromic Acid Gas. II Indium in Tungsten Minerals». Journal of the American Chemical Society(en inglés) (American Chemical Society) 20 (10): 797-813. ISSN0002-7863. doi:10.1021/ja02072a014.
Mathews, 1898, p. 551; Willstätter y Stoll, 1928, pp. 3, 229; Johnson, 1890, p. 125 «Chlorophyllan, obtained by Hoppe-Seyler from grass, separates from its solution in hot alcohol in characteristic acicular crystals which are brown to transmitted light, and in reflected light are blackish green, with a velvety, somewhat metallic lustre. This substance has the consistence of beeswax, adheres firmly to glass, and at about 230" melts to a brilliant black liquid. The crystallized chlorophyllan has a composition as follows: Carbon 73.36, Hydrogen 9.72, Nitrogen 5.68, Phosphorus 1.38, Magnesium 0.34, Oxygen 9.52. Chlorophyllan is chemically distinct from chlorophyl, as proved by its optical properties, but in what the difference consists is not understood. Boiling alkali decomposes it with formation of chlorophyllanic acid that may be obtained in blue-black crystals, and at the same time glycerophosphoric acid and cholin, the decompositionproducts of lecithin, are produced. Tschirch found that chlorophyllan, by treatment with zinc oxide, yields a substance whose optical properties lead to the belief that it is identical with the chlorophyl that occurs in the living plant. It was obtained as a dark-green powder, but its exact chemical composition is not known».Mathews, Albert P. (agosto de 1898). «The Life and Work of Felix Hoppe-Seyler». Appletons' Popular Science Monthly(en inglés) (New York: Popular Science Pub. Co.) 53: 542-552.——; Stoll, Arthur (1928). Investigations on Chlorophyll: Methods and Results(en inglés). traducido por Frank Milton Schertz y Albert Ronald Merz. Science Press Printing Company. Archivado desde el original el 18 de mayo de 2015. Consultado el 10 de mayo de 2015.Johnson, Samuel W. (1890). How crops grow. A treatise on the chemical composition, structure and life of the plant, for students of agriculture. With numerous illustrations and tables of analyses(en inglés). New York: Orange Judd Company. doi:10.5962/bhl.title.40419.
