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The research of environment temperature influence on the input and output exergy flows in air-split conditioners refrigeration machines

100%

Labay V. Y. , Getsko V. V. , Omelchuk O. V.

Zeszyty Naukowe Politechniki Częstochowskiej. Budownictwo

2014

tom Z. 20 (170)

133--139

The elaborating method of the exergetic analysis of air split-conditioners one-step Freon refrigeration machines was used in this article. The dependence of input and output specific exergy flows and exergetic output-input ratio for refrigeration machine of air split-conditioner of firm “Sanyo” with cooling capacity 2020 W for refrigerators agent R22 from different temperatures of environment was defined.

W artykule zastosowano metodę analizy egzergetycznej urządzeń typu air split-conditioners refrigeration. Zdefiniowano zależność wyjściowych i wejściowych przepływów egzergetycznych oraz stosunku przepływów egzergetycznych dla urządzenia typu air split-conditioners refrigeration firmy Sanyo o wydajności chłodzenia 2020 W od różnych temperatur otoczenia.

Emigration activity of the saw-toothed grain beetle Oryzaephilus surinamensis L. (Coleoptera: Silvanidae) in various environmental temperatures

84%

Klys M.

nr 4

The study pertained to the saw-toothed grain beetle Oryzaephilus surinamensis L., a dangerous pest of stored food products. The studies were carried out in the laboratory. Thermostats were set at a temperature of 31°C; an optimum temperature for this insect species, and in temperatures lowered to 28 and 22°C. The relative air humidity was kept at 60 ±5% relative humidity (RH). The main topic of the study was to examine the effect of lower temperatures in the environment, on the emigration activity of O. surinamensis. In these conditions, the population dynamics and the sex structure in O. surinamensis populations were also studied. The saw-toothed grain beetle was found to display very high emigration activity at 31 and 28°C. Lowering the temperature to 22°C caused a decrease in emigration activity and total inhibition of emigration activity until the 120th day of the experiment. A higher emigration levels among females rather than males, was also observed.

Effect of hyperthermia on morphology and histochemistry of spinal cord in the rat

84%

Godlewski A. , Wygladalska-Jernas H. , Szczech J.

Folia Histochemica et Cytobiologica

1986

tom 24

nr 1

Effect of the environmental temperature on the beginning of oviposition in the springtail Tetrodontophora bielanensis [Waga], [Collembola]

84%

Krzysztofowicz A. , Jura C.

Acta Biologica Cracoviensia. Series Zoologia

1995

tom 37

Nitric oxide production and thermoregulation in Paramecium caudatum

84%

Malvin G. M. , Cecava N. , Nelin L. D.

Acta Protozoologica

2003

tom 42

nr 4

Influence of different dietary vitamin E supplementation on some plasma components and egg production of laying Japanese quails during heat stress

67%

Kaya S.

tom 63

nr 12

1568-1571

The experiment was conducted to evaluate the effects of vitamin E (dl-a-tocopherol acetate) supplementation at various concentrations (0-control-, 250, 500, 750 mg/kg of diet) on the feed intake, egg production, plasma enzymes, electrolytes and metabolites of laying quails (Coturnix coturnix japonica) exposed to chronic heat stress at a mean temperature of 31°C from 13 to 17 weeks of age. The quails were randomly assigned to 4 treatment groups, 3 replicates of 15 birds each. Body weight, feed intake and egg production were not affected by vitamin E supplementation. Plasma total cholesterol, total protein, alkaline phosphatase (ALP), blood urea nitrogen (BUN), inorganic P and Mg concentrations did not differ among the groups. Plasma creatinine was higher in the 750 mg/kg vitamin E supplemented group than in other vitamin E supplemented groups. Plasma glucose concentrations decreased as dietary vitamin E increased up to 500 mg/kg of the diet. A higher glucose concentration and activity of glutamic-oxaloacetic transaminase (GOT) were stated in the control group. Triglyceride concentration was the highest whereas albumin and Ca concentrations were higher in the control group than for the 250 and 750 mg/kg vitamin E supplemented groups. Plasma glutamic pyruvic transaminase (GPT) activity was the lowest in control group. These results indicate that the supplementation of 500 mg vitamin E/kg to the diet may offer a potential protective management practice for preventing heat stress-related damages in laying quails.

The effect of acute heat exposure on rat pituitary corticotroph activation: the role of vasopressin

67%

Jasnic N. , Korac A. , Velickovic K. , Golic I. , Djordjevic J. , Djurasevic S. , Djordjevic I. , Vujovic P. , Cvijic G.

Folia Histochemica et Cytobiologica

2010

tom 48

nr 4

Topography and morphology of arterial walls thickness in the limbs of the bears

67%

Tokarska E. , Wegrzyn M. , Bylina D. , Lis I.

tom 03

nr 1