نتایج جستجو برای: dynamic resistance of cones tip

تعداد نتایج: 21251093  

Journal: :Methods in molecular biology 2011
Daniel M Suter

The neuronal growth cone, a highly motile structure at the tip of neuronal processes, is an excellent model system for studying directional cell movements. While biochemical and genetic approaches unveiled molecular interactions between ligand, receptor, signaling, and cytoskeleton-associated proteins controlling axonal growth and guidance, in vitro live cell imaging has emerged as a crucial ap...

Journal: :Journal of neurobiology 2006
Emilie L Grzywa Aih Cheun Lee Gil U Lee Daniel M Suter

Neuronal growth cones are motile sensory structures at the tip of axons, transducing guidance information into directional movements towards target cells. The morphology and dynamics of neuronal growth cones have been well characterized with optical techniques; however, very little quantitative information is available on the three-dimensional structure and mechanical properties of distinct sub...

2015
István FÖLDI

In the nervous system neurons are organized into functional circuits where information between cells is transmitted by axons and dendrites. Axons are slender projections that extend over long distances in order to reach defined targets, i.e. other neurons, muscles or glandular cells. Growth cones, located at the distal tip of axons, play a crucial role in guiding axons to their correct target s...

Journal: :Applied sciences 2021

The aim of this study was to analyze the effect taper and apical diameter nickel–titanium (NiTi) endodontic rotary files on dynamic cyclic fatigue resistance. A total 50 unused conventional NiTi wire alloy instruments were used in study. All submitted a custom-made device until fracture occurred. time failure, number cycles pecking movements, length fractured file tip analyzed using analysis va...

Tip leakage loss introduces major part of losses of the rotor in axial gas turbines. Therefore, the rotor blade tip has a considerable effect on rotor efficiency. To understand the flow physics of the rotor tip leakage, we solve the flow field for different tip platforms (passive flow control) and by considering coolant tip injection (active flow control). Various blade tip configurations s...

Journal: :Applied optics 1980
J Y Liou C J Chen J W Chen

Total internal reflecting surfaces have been proposed as regenerative structures for solid-state lasers; the laser energy is extracted from the resonator through frustrated total re­ flection by a coupling prism. Instead of using frustrated total reflection to extract the energy, we found the energy can be extracted through a hole on the tip of the total reflecting surface. In this experiment, ...

Journal: :journal of dentistry, tehran university of medical sciences 0
m. saatchi l. etesami

statement of problem: it has been established that successful root canal treatment depends on the quality of obturation. deeper penetration of spreaders can improve the apical seal and the quality of the obturation. purpose: the aim of this study was to compare the initial penetration depth of spreaders during lateral condensation of 0.04 and 0.02 tapered gutta-percha master cones. materials an...

Journal: :The Southeast Asian journal of tropical medicine and public health 2009
Pradya Somboon Kritiya Yamniam Catherine Walton

The structure of the cibarial armature of mosquitoes has been found to be useful for taxonomic identification. We used a scanning electron micrograph to examine the cibarial armature of 4 of 5 species in the Anopheles dirus complex existing in Thailand: Anopheles dirus Peyton & Harrison, and An. cracens Sallum & Peyton, An. scanloni Sallum & Peyton, and An. baimaii Sallum & Peyton. In all speci...

2006
Saeed Asgary Masoud Parirokh Mohammad Jafar Eghbal Jamileh Ghoddusi

INTRODUCTION The purpose of this study was to evaluate the morphologic surface of gutta-percha cones after cutting with different methods. MATERIALS AND METHODS The apical 3 millimeters of forty standardized, gutta-percha cones size 40 were cut off using scissors or a scalpel against a glass slab. The samples were then examined under scanning electron microscopy (SEM) for topographic deformit...

Journal: :international journal of civil engineering 0
h. ziari iust, tehran,iran h. divandari islamic azad university, nowshahr branch, department of engineering, nowshahr, iran

pavement permanent deformations due to lack of shear strength in mixture are a major reason of rutting. any simple test to determine mixtures resistance to permanent deformation isn’t distinguished in the 1st level of superpave mix design method and prevalent methods for evaluating mixture rut resistance are expensive and time-consuming. two aggregate types, gradations, asphalt cements and fill...

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