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9 resultaten
Morphological and biochemical examination of Cosmos 1887 rat heart tissue: Part I--Ultrastructure.
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Morphological changes were observed in the left ventricle of rat heart tissue from animals flown on the Cosmos 1887 biosatellite for 12.5 days. These tissues were compared to the synchronous and vivarium control hearts. While many normal myofibrils were observed, others exhibited ultrastructural
[Structural and functional organization of the vestibular apparatus in rats maintained under weightless conditions for 19.5 days aboard the satellite "Cosmos-782"].
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Vestibular apparatus was investigated in rats subjected to weightlessness for 19.5 days in the satelite "Cosmos-782" and experienced acceleration on launching and landing. Some structural and functional changes were noted. They were seen in otolith clinging to the utricular receptor surface and in
[Ultrastructure of the blood vessels and muscle fibers in the skeletal muscle of rats flown on the Kosmos-605 and Kosmos-782 biosatellites].
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Electron microscopy was used to study ultrastructures of the wall of blood vessels and muscle fibers of the red (soleus) and mixed (gastrocnemius) muscles of rats flown on Cosmos-605 for 22.5 days and on Cosmos-782 for 19,5 days and sacrificed 4-6 hours, 48 hours and 25-27 days postflight. It was
[Structural changes in the soleus muscle of rats on the Kosmos-series biosatellites and in hypokinesia].
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Structural changes in the soleus muscle of rats used in flight and synchronous experiments of the Cosmos program and hypokinetic studies have been investigated. It is hypothesized that focal edema and dystrophic changes observed in flight, synchronous and hypokinetic rats can be caused by
Review of primary spaceflight-induced and secondary reloading-induced changes in slow antigravity muscles of rats.
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We have examined the light and electron microscopic properties of hindlimb muscles of rats flown in space for 1-2 weeks on Cosmos biosatellite flights 1887 and 2044 and Space Shuttle missions Spacelab-3, Spacelab Life Sciences-1 and Spacelab Life Sciences-2. Tissues were obtained both inflight and
[Morphohistochemical study of skeletal muscles in rats after experimental flight on "Kosmos-1887"].
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Morphometric and histochemical methods were used to examine the soleus, gastrocnemius (medial portion), quadriceps femoris (central portion) and biceps brachii muscles of Wistar SPF rats two days after the 13-day flight on Cosmos-1887. It was found that significant atrophy developed only in the
Distinguishing unloading- versus reloading-induced changes in rat soleus muscle.
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Previously, solei from rats orbited 12.5 days aboard Cosmos 1887 biosatellite were biopsied 48-56 hours postflight. These atrophic muscles showed severe pathology. Designing a ground-based model of that space flight, we tested the hypothesis that 48 hours of postflight muscle reloading induced
Muscle sarcomere lesions and thrombosis after spaceflight and suspension unloading.
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Spaceflight (flight) and tail suspension-hindlimb unloading (unloaded) produced significant decreases in fiber cross-sectional areas of the adductor longus (AL), a slow-twitch antigravity muscle. However, the mean wet weight of the flight AL muscles was near normal, whereas that of the suspension
Skeletal muscle fiber, nerve, and blood vessel breakdown in space-flown rats.
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Histochemical and ultrastructural analyses were performed postflight on hind limb skeletal muscles of rats orbited for 12.5 days aboard the unmanned Cosmos 1887 biosatellite and returned to Earth 2 days before sacrifice. The antigravity adductor longus (AL), soleus, and plantaris muscles atrophied
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