[The content of DNA, RNA and wet weight and the RNA:DNA and wet weight:DNA ratio in different tissues during the growth of chickens. 1. Analysis of the brain, the myocardium, the lungs and the liver]. / Der Gehalt an DNA, an RNA und an Frischmasse sowie der RNA:DNA- und der Frischmasse: DNA-Quotient in verschiedenen Geweben während des Wachstums beim Huhn. 1. Mitteilung: Analyse des Gehirns, des Herzmuskels, der Lunge und der Leber.

At each 8 chickens of the race "white leghorn" analyses of the body weight as well of the wet weight and the concentration of DNA and of RNA in different tissues from the 2nd to the 203rd day after hatching were performed. On the 2nd day after hatching the DNA-concentration in the brain amounted to 1.50 +/- 0.12, in the heart-muscle to 2.86 +/- 0.19, in the lung to 7.23 +/- 0.19 and in the liver to 2.86 +/- 0.20 mg/g wet weight. The highest content of nuclei in the brain of 1.38 x 10(9) was estimated on the 56th, in the heart-muscle of 1.94 x 10(9) on the 168th day, in the lung of 16.86 x 10(9) on the 112th day and in the liver of 69.81 x 10(9) on the 203rd day. Further the RNA:DNA- and the wet weight:DNA-ratio of the different tissues was calculated.

[The content of the DNA, the RNA and the wet weight and the RNA:DNA and the wet weight:DNA ratio in different tissues during the growth of chickens. 2. Analysis of the kidney, the spleen, the gizzard and the M. pectoralis superficialis]. / Der Gehalt an DNA, an RNA und an Frischmasse sowie der RNA:DNA-und der Frischmasse:DNA-Quotient in verschiedenen Geweben während des Wachstums beim Huhn. 2. Mitteilung: Analyse der Nieren, der Milz, des Muskelmagens und des M. pectoralis superficialis.

At chicken of the race "White Leghorn" the content of nuclei in the kidney was highest (14.60 x 10(9)) on the 203rd, in the spleen on the 112th (14.85 x 10(9)), in the gizzard on the 112th (18,24 x 10(9)) and in the M. pectoralis superficialis on the 168th day (36.42 x 10(9)) after hatching. The biggest fresh weight:DNA-ratio was determined in the kidney on the 203rd (285), in the spleen on the 28th (92) and in the gizzard (694) and in the M. pectoralis superficialis (1984) on the 203rd day. The DNA-concentration on the 2nd day after hatching in the kidney was 4,56 +/- 0,36, in the spleen 11.49 +/- 0.84, in the gizzard 1.85 +/- 0.13 and in the M. pectoralis superficialis 2.96 +/- 0.18 mg/g wet weight respectively the RNA:DNA-ratio in these tissues 1.00, 0.88, 1.70 and 0.85. The growth of tissues by the increase of the number of cells (hyperplasia) and of the volume of cells (hypertrophy) is described.

[The effect of a different level of crude protein in the feed of chickens from 1 to 14 days after hatching on the development of body weight, the biochemical parameters of the liver and breast muscle and the serum level of total protein and albumin]. / Der Einfluss eines unterschiedlichen Gehalts an Rohprotein im Futter von Küken vom 1. bis zum 14. Tag nach dem Schlüpfen auf die Entwicklung der Körpermasse, auf biochemische Kennwerte der Leber und des Brustmuskels sowie auf den Gehalt des Serums an Gesamtprotein und an Albumin.

The effect of a concentration of crude protein of 170 or of 227 g/kg in the ration of chicken from the 1st to the 14th day after hatching on biochemical values of the liver, the M. pectoralis superficialis and the serum was analysed. The significance of developmental investigations in domestic animals under normal and pathological conditions is discussed.

[A videorecorder attached to the D-800]. / Videorekorder am D-800.

A commercial videorecorder can be easily linked to the RFA-4030 video chain. Especially in angiography this leads to an improved investigation scheme. More examples are mentioned, where image storage is advantageous.