This work evaluates the possibility of meeting a single family household’s need for hot water and heat year round, using solar collectors as the sole energy source. The main flaw of energetic systems based on solar energy is that the energy supply is usually insufficient in winter, when it is most needed. This work is going to show that, for a house surface of 150 m2 and base dimension of 10×10 m, it is possible to supply sufficient heat for everyday purposes with solar energy only, using a thermally insulated thermal storage unit of 200 m3 volume, filled with water or paraffin wax.
In developing Gallería mellonella larvae (reared at 30°C) three proteins of 74/ 76 and 81/82 kDa were identified. They represent a group of storage proteins (LHP proteins). In Galleria larvae, the development of which is arrested by low temperature (18°C)/ accumulation of the 74, 76 and 81/82 kDa proteins was detected in the hemolymph. The synthesis of 74 kDa and 76 kDa proteins started after 24 h, and that of about 80 kDa after 96 h following the transfer of larvae from 30°C to 18°C. 20-Hydroxyecdysone inhibited synthesis of the 74 and 76 kDa proteins in larvae exposed to low temperature. The arrest of development of Galleria larvae is associated with the synthesis and accumulation of storage proteins, and ecdysteroids are involved in these processes.
Torlińska, T., Malendowicz, L. K, Paluszak, J., Koźlik, J., Nowak, M., Nowak, K. W. and Godlewski, J.: The effect of 4-aminopyrazolo (3,4-d) pyrimidine (4-APP) on some parameters of carbohydrate metabolism in the rat. Acta physiol, pol., 1989, 40 (5-6): 530-534. The study was designed to evaluate some parameters of carbohydrate metabolism in the rat as influenced by 4-APP, an adenine analogue. Adult female rats were injected with 1 mg 4-APP /100 g body weight/ day for 3 days. 4-APP evoked a marked enlargement of the liver with lipid droplets accumulation in hepatocytes. This was accompanied by a marked lowering of the liver glycogen content. Within 3 days 4-APP did not change serum glucose, insulin and free fatty acid concentration. Serum glycogenolytic activity studied in an in vitro system showed 7 times as high glucose releasing ability in 4-APP treated rats as that of the serum of control animals. 4-APP resulted also in a marked enlargement of the adrenal medulla and lowered adrenaline and noradrenaline concentrations in the gland. The possibility of an activation of glycogenolysis in the liver of 4-APP treated rats has been discussed.