中国水牛肾上腺光镜和电镜观察

对成年的湖南滨湖水牛肾上腺光镜和电镜观察结果表明，肾上腺外面被覆一层较厚的被膜，内分皮质部和髓质部．四周为皮质部，呈深黄色，约占肾上腺７０％，中央为髓质部，呈灰白色，约占肾上腺３０％．Ｈ－Ｅ染色法将皮质部分为３个小区，即球状区，束状区和网状区．球状区薄，细胞染色较深；束状区厚，胞质呈蜂窝状，细胞染色浅；网状区细胞与髓质交界参差不齐，胞核呈退化变性现象，染色较深．髓质部比皮质部染色浅，常分为外区和内区．外区细胞大，呈高柱状，主要由肾上腺素细胞组成；内区细胞较小，呈立方或多边形，由去甲肾上腺素细胞和肾上腺素细胞组成，去甲肾上腺素细胞分散于肾上腺素细胞之间．髓质部还有少数分散的大型交感神经节细胞，且内区比外区多．     

THE EFFECT OF ADRENAL CORTICAL AND PITUITARY ADRENOTROPIC HORMONES ON TRANSPLANTED LEUKEMIA IN RATS

Growth was obtained in rats on synthetic diets in which the ten essential amino acids were the sole source of amino acid nitrogen. The growth rate was dependent upon the quantity of amino acids fed and appeared to compare favorably with that obtained when a similar quantity of nitrogen was fed in the form of casein. No increase in growth was observed when nitrogen in addition to that given in the form of the essential amino acids was supplied as glycine. Our experiments would not support the contention that the unnatural forms of the amino acids are toxic. We wish to acknowledge and thank Phyllis Robison for technical assistance, and Dr. D. Mark Hegsted for helpful suggestions.