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New synthesis of camphor
666
CURRENT TOI'ICS.
[J. F. I.
New Synthesis of Camphor.--JoHN J. RITTER (flour. Am. Chem. Soc., 1933, LV, 3322-3326) has achieved a new synthesis of camphor. Bornyl chloride is converted into isobornylaniline, then, by means of a nickel catalyst, into camphor anil. This is then hydrolyzed to obtain camphor. J. S. H. Prolactin: a New Hormone.--OSCAR RIDDLE, ROBERTW. BATES, AND SIMON W. DYKSHORN (Am. J. Physiol., 1933, CV, I91-216 ) have discovered a new hormone, prolactin, which is secreted by the anterior lobe of the pituitary gland, travels in the blood stream, and causes the secretion of milk. J. s. H. Occurrence of Metals in the Liver.--H. RAMAGE, J. H. SHELDON, AND WILFRID SHELDON (Proc. Royal Soc. [London], Series B, 1933, CXIII, 308-327) have subjected the livers of 125 children to spectrographic analysis. At birth, the liver contains a reserve supply of iron and copper; other metallic elements, such as manganese, rubidium, and calcium, are also present. The iron reserve is increased during the first two months of life. While the child is on a milk diet, the iron, copper, manganese, and calcium concentrations in the liver decrease, while the concentration of potassium and of rubidium increases. After the child is placed on a mixed diet, the content of the liver in iron, copper, manganese, and calcium increases. Approximately one-third of the livers contained silver. HENRY GEORGE REES (Analyst, 1933, LVIII, 384-387) analyzed fresh ox liver and found 0.0080 per cent of iron and 0.0024 per cent. of copper. On extraction with water at a temperature of 5 °0 C., 38.1 per cent. of the total iron and 7-3 per cent. of the total copper passed into the aqueous extract. Application of a higher temperature was less effective for extraction of the iron. J. S. H. Lactic Acid Content of Milk Products.--In the course of a paper on the quantitative determination of lactic acid in milk and its products, by oxidation to oxalic acid, and precipitation of calcium oxalate, B. G. HARTMANNAND F. HILLIG (flour. Asso. O~cial Agric. Chem., 1933, XVI, 435-445) report the per cent. of lactic acid found in certain dairy products: Fluid whole milk (4 samples) 0.025 to 0.029, whole milk powder (3 samples) o.217 to 0.275, evaporated milk (3 samples) 0.057 to 0.084, sweeten ed condensed milk (I sample) o. 125; milk fresh from cow 0.022, after 24 hours at room temperature 0.057, signs of curdling o.133, curdled 0.287. J. S. H.
CURRENT TOI'ICS.
[J. F. I.
New Synthesis of Camphor.--JoHN J. RITTER (flour. Am. Chem. Soc., 1933, LV, 3322-3326) has achieved a new synthesis of camphor. Bornyl chloride is converted into isobornylaniline, then, by means of a nickel catalyst, into camphor anil. This is then hydrolyzed to obtain camphor. J. S. H. Prolactin: a New Hormone.--OSCAR RIDDLE, ROBERTW. BATES, AND SIMON W. DYKSHORN (Am. J. Physiol., 1933, CV, I91-216 ) have discovered a new hormone, prolactin, which is secreted by the anterior lobe of the pituitary gland, travels in the blood stream, and causes the secretion of milk. J. s. H. Occurrence of Metals in the Liver.--H. RAMAGE, J. H. SHELDON, AND WILFRID SHELDON (Proc. Royal Soc. [London], Series B, 1933, CXIII, 308-327) have subjected the livers of 125 children to spectrographic analysis. At birth, the liver contains a reserve supply of iron and copper; other metallic elements, such as manganese, rubidium, and calcium, are also present. The iron reserve is increased during the first two months of life. While the child is on a milk diet, the iron, copper, manganese, and calcium concentrations in the liver decrease, while the concentration of potassium and of rubidium increases. After the child is placed on a mixed diet, the content of the liver in iron, copper, manganese, and calcium increases. Approximately one-third of the livers contained silver. HENRY GEORGE REES (Analyst, 1933, LVIII, 384-387) analyzed fresh ox liver and found 0.0080 per cent of iron and 0.0024 per cent. of copper. On extraction with water at a temperature of 5 °0 C., 38.1 per cent. of the total iron and 7-3 per cent. of the total copper passed into the aqueous extract. Application of a higher temperature was less effective for extraction of the iron. J. S. H. Lactic Acid Content of Milk Products.--In the course of a paper on the quantitative determination of lactic acid in milk and its products, by oxidation to oxalic acid, and precipitation of calcium oxalate, B. G. HARTMANNAND F. HILLIG (flour. Asso. O~cial Agric. Chem., 1933, XVI, 435-445) report the per cent. of lactic acid found in certain dairy products: Fluid whole milk (4 samples) 0.025 to 0.029, whole milk powder (3 samples) o.217 to 0.275, evaporated milk (3 samples) 0.057 to 0.084, sweeten ed condensed milk (I sample) o. 125; milk fresh from cow 0.022, after 24 hours at room temperature 0.057, signs of curdling o.133, curdled 0.287. J. S. H.