Halaman 1 dari 35 hasil
The objective of this investigation was to characterize organismic, organ and mitochondrial alterations in rats over the course of 27 days at 0.4 atm. In the adjustment phase (day 1 through 5) a significant decrease in systemic oxygen uptake and body weight (23% of pre-altitude values) occurred. In
Influence of oxygen deficiency and vasodilating drugs on coronary arterial tonus was investigated. In the fibrillating heart, hypoxia initially decreased total coronary resistance, later increased it, and exerted little effect on large coronary arteries. Dilation of helically cut specimens of the
Expression of the damaging effect of adrenalin on the myocardium of rats adapted to hypoxia was studied under condition of adrenalin being injected into the integral body or in perfusion of an isolated heart. The damage was tested by the histoenzymatic reaction for the succinic dehydrogenase
The rabbits being repeatedly poisoned with small doses of sodium cyanide, the activity of succinic dehydrogenase in the tissues does not essentially change. The activity of NAD.H2-cytochrome-c-reductase and NAD.H2-diaphorase in the brain, myocardium and kidneys increases. Under histotoxic hypoxia
OBJECTIVE
Treatment with acetylsalicylic acid (ASA) is established for secondary stroke prevention. Recent studies showed neuroprotection of ASA against glutamatergic excitants. The goal of this study was to investigate the time course of neuroprotection of ASA against indirect excitotoxicity by
Cochlear microphonics and succinic dehydrogenase (SDH) activity of the hair cells during anoxia were studied in guinea pigs. After injection of the glucose-glucose oxidase mixture into the cerebellomedullary cistern, the deprivation of the oxygen tension in CSF and perilymph was measured in
Tench (Tinca tinca) were acclimated to either aerated (P02 17.6 KPa) or hypoxic water (P02 1.5 KPa) at 15 degrees C. Fish acclimated to P02 17.6 KPa had a routine oxygen consumption (mls O2/Kg bodyweight/h) of 32.7 in aerated water. Upon acute exposure to Po2 1.5 KPa oxygen consumption decreased to
The studies have been performed in high- (HR) and low-resistant (LR) to hypoxia animals swimming to the point of exhaustion. It has been established that HR rats are capable to endure the dynamic load twice longer. The introduction of sodium alpha-ketoglutarate (SKG) increases the endurance of LR
The dynamic changes in the CAP, SP and EP in the scale media were examined with single micropipet during anoxia and reventilation with oxygen. Also, the morphologic changes in the IHC, OHC and synapse were observed in this experiment. It was found that the amplitude of the SP and EP values declined
The resistance of mice to hypoxic hypoxia 3 months after their X-irradiation was evaluated with respect to such parameters as survival rate during the "ascent" to 11,000 m, life time at that altitude and brain succinic dehydrogenase (SDH) and lactate dehydrogenase (LDH) activities at an altitude of
Hypoxic, thermal and radiation tolerance of rats exposed to hypoxia and overheating for 4 to 22 days was measured. Activities of succinic dehydrogenase, lactate dehydrogenase and alkaline phosphomonoesterase as well as water content in the brain were examined biochemically and histochemically. Brain
Laboratory animals were kept for 2, 8 and 16 hours in a pressure chamber, the air of which contained 8% O2 and 92% N2. Histochemical and ultrastructural examinations revealed the following duodenal alterations: 1. The alkaline phosphatase activity of the epithelium and glandular epithelium showed no
With the seedlings of Lübachun No. 4, a hypoxia-resistant cultivar, and Zhongnong No. 8, a hypoxia-sensitive cultivar, as test materials, and by the method of solution culture, this paper studied the effects of root zone hypoxia on their roots' respiratory metabolism. The results showed that root