Contractile Root
Mostrando 1-12 de 13 artigos, teses e dissertações.
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1. Diversidade morfoanatômica das estruturas subterrâneas de Arrojadoa Britton &Rose (Cactoideae, Cactaceae) / Morpho-anatomical diversity of the subterranean structures of Arrojadoa Britton &Rose (Cactoideae, Cactaceae)
Os diferentes taxa de Arrojadoa exibem uma variedade de estruturas subterrâneas, tanto de origem caulinar como radicular. O desenvolvimento de estruturas subterrâneas de origem caulinar em Arrojadoa é uma característica única entre as Cactaceae do leste do Brasil. No entanto, não há estudos sobre a diversidade morfológica das estruturas subterrâneas
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 05/07/2011
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2. Proerectile effect of an alkaloidical rich fraction isolated from aspidosperma ulei markgr.: in vivo and in vitro study. / Efeito pró-erétil de uma fração rica em alcalóides isolada de aspidosperma ulei markgr.: estudo in vivo e in vitro
The genus Aspidosperma (Apocyanaceae) is known to be rich in yohimbine type of indol alkaloids. This study was aimed to evaluate the alkaloid rich fraction (SF3-5) obtained from Aspidiosperma ulei Markgr. root bark for its general toxicity, behavioral effects in mice and a possible proerectile activity. Acute toxicity tests were performed to determine the LD
Publicado em: 2005
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3. The Mechanics of Left Ventricular Contraction in Acute Experimental Cardiac Failure*
The effects of acute cardiac failure induced by pentobarbital or pronethalol on the basic mechanical properties of the intact left ventricle were examined in the dog, and the influence on auxotonic and isovolumic contractions of the increase in end-diastolic volume that usually accompanies cardiac failure was assessed. The right heart bypass preparation was
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4. Contractile and electromyographic characteristics of rat plantaris motor unit types during fatigue in situ.
1. The ventral root dissection technique was used to obtain contractile and electromyogram (e.m.g.) characteristics of ninety-five plantaris motor units in situ in pentobarbitone-anaesthetized rats (n = 20). 2. Motor units demonstrated a wide spectrum of sizes, contractile speeds, and fatigue indices, and were categorized in the same manner as cat hind-limb
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5. Reinnervation of the lateral gastrocnemius and soleus muscles in the rat by their common nerve.
To determine whether there is any specificity of regenerating nerves for their original muscles, the common lateral gastrocnemius soleus nerve (l.g.s.) innervating the fast-twitch lateral gastrocnemius (l.g.) and slow-twitch soleus muscles was sectioned in the hind limb of twenty adult rats. The proximal nerve stump was sutured to the dorsal surface of the l
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6. Organization of motor units following cross-reinnervation of antagonistic muscles in the cat hind limb.
Peripheral reorganization of nerve and muscle properties was studied following misdirection of regenerating axons to foreign muscles. The tibial nerve, which innervates all of the distal extensor muscles, was cross-united with the common peroneal nerve, which innervates all of the distal flexor muscles, in one hind limb of seven 2-6 month old cats. After 18-
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7. Bacteriophage that can distinguish between wild-type Rhizobium japonicum and a non-nodulating mutant.
A bacteriophage (phage TN1) that lyses Rhizobium japonicum 3I1b110 was isolated from Tennessee soil. Structurally, this phage resembles the Escherichia coli phage T4, having an icosahedral head (47 by 60 nm) and a contractile tail (17 by 80 nm). An interesting feature of this phage is that it lyses all of the symbiotic defective mutants derived from R. japon
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8. Isolation and Characterization of a Bacteriophage Tail-Like Bacteriocin from a Strain of Rhizobium
Bacterial strain 16-3 spontaneously produces a bacteriocin which inhibits the growth of closely related strain 16-2. Both strains were newly isolated from root nodules of lupines and probably belong to the species Rhizobium lupini. Production of infectious progeny of newly isolated virulent phage 16-2-4 in strain 16-2 is inhibited completely if complexes are
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9. In-series compliance of gastrocnemius muscle in cat step cycle: do spindles signal origin-to-insertion length?
1. It has been claimed that stretch in the non-contractile (extramysial) portion of muscles is substantial, and may produce large discrepancies between the origin-to-insertion muscle length and the internal length variations 'seen' by muscle spindle endings. 2. In eight pentobarbitone-anaesthetized cats, we estimated stretch in the extramysial portion of med
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10. Contractile characteristics and innervation ratio of rat soleus motor units.
1. Physiological properties of motor units in the soleus muscle were studied in anaesthetized rats using ventral root splitting to isolate single units. 2. Motor unit types were classified by the same criteria used to classify cat hindlimb motor units into types FR (fast-twitch, fatigue-resistant) and type S (slow-twitch, fatigue-resistant). Type FR units we
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11. Mechanical and morphological properties of chronically inactive cat tibialis anterior motor units.
1. The lumbar spinal cord was functionally isolated in ten cats by cord transection at the junctions of segments T12-T13 and L7-S1 and cutting bilaterally all dorsal roots between the two transections. Two 24 h EMG recording sessions were used to verify that muscles in the lower limb were virtually electrically silent. The cats were maintained in excellent h
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12. Synaptic rearrangements and alterations in motor unit properties in neonatal rat extensor digitorum longus muscle.
1. We have used in vitro intracellular recordings and measurements of the contractile properties of single motor units to examine the changes in muscle innervation occurring during the post-natal development of a fast-twitch muscle in the hindlimb of the rat, the extensor digitorum longus (EDL). 2. Intracellular recordings of end-plate potentials evoked in r