نتایج جستجو برای: labyrinth
تعداد نتایج: 7019 فیلتر نتایج به سال:
CONCLUSION Three-dimensional cone beam computed tomography (3DCT) images revealed characteristic malformations of the membranous labyrinth of the inner ear in Meniere's disease (MD). The morphology of the membranous region between the vestibular cecum of the cochlea and the saccule of ears with MD was compared to that of healthy ears. The present study supports the hypothesis proposed earlier t...
An oncogenic D842V mutation in the platelet-derived growth factor (PDGF) alpha-receptor (Pdgfra) has recently been described in patients with gastrointestinal stromal tumors. In order to test if the same mutation would confer oncogenic properties to the homologous PDGF beta-receptor (Pdgfrb), the corresponding aspartic acid residue at position 849 of Pdgfrb was changed into valine (D849V) using...
MOTIVATION This paper presents a workflow designed to quantitatively characterize the 3D structural attributes of macroscopic tissue specimens acquired at a micron level resolution using light microscopy. The specific application is a study of the morphological change in a mouse placenta induced by knocking out the retinoblastoma gene. RESULT This workflow includes four major components: (i) ...
PROBLEM Pregnancy is a challenge to the maternal immune system as it must defend the body against pathogens while at the same time develop immune tolerance against the fetus growing inside the uterus. Despite ex vivo techniques being used to understand these processes, in vivo techniques are missing. METHOD OF STUDY To directly study these phenomena, we have developed a new microscope stage a...
The importance of the labyrinth as a trope in the Western tradition can hardly be overstated. Far from being a metaphor that describes just anything, it is a sign whose meaning appears in specific contexts. This article argues how the labyrinth’s triple function as visual, verbal and spatial sign—as well as its paradoxical function as unicursal and multicursal structure—makes it flexible enough...
We report flow instabilities with simultaneous, in-plane-rotating and dc-axial uniform magnetic fields. In uniform dc-axial magnetic fields, a ferrofluid drop in a Hele-Shaw cell with an ,1.0-mm gap forms the familiar labyrinth pattern. With subsequent application of an ,100-G rms in-plane, 20–40-Hz rotating uniform magnetic field, smooth spirals form. If the rotating magnetic field is applied ...
Labyrinth seals are widely used in centrifugal compressors, turbines, and many other pneumatic systems due to their simplicity of design, reliability, low cost. The calculation scheme for the movement working medium a labyrinth seal is constructed by analogy with through holes sharp edge. Annular flat slots, holes, such factor as shaft rotation calculated sector 3 degrees were studied. purpose ...
Labyrinth seals are extensively used in gas turbines to control leakage between components. In this research, the effects of geometry on sealing performance investigated. To obtain best performance, an investigation is undertaken into possibility optimising labyrinth seal planforms using a genetic algorithm (GA). Large Eddy Simulation (LES) for its ability accurately capture complex unsteady be...
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