Готові списки джерел за темами / Interphase analysi

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Добірка наукової літератури з теми "Interphase analysi"

Автор: Grafiati
Опубліковано: 11 березня 2023

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Статті в журналах з теми "Interphase analysi"

1

Wang, Meng, and Xiaochen Hang. "Finite Element Analysis of Residual Stress Distribution Patterns of Prestressed Composites Considering Interphases." Materials 16, no. 4 (February 5, 2023): 1345. http://dx.doi.org/10.3390/ma16041345.

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New finite element analysis procedures are developed in this study to obtain the precise stress distribution patterns of prestressed composites. Within the FEM procedures, an equivalent thermal method is modified to realize the prestress application, and a multi-step methodology is developed to consider coupling effects of polymer curing and prestress application. Thereafter, the effects of interphases’ properties, including the elastic modulus and coefficient of thermal expansion (CTE), on the stress distribution patterns are revealed. Analytical methods for residual stress prediction are modified in this study to demonstrate the finite element analysis procedures. From the residual stress results, it is found that the increase in the prestress level tends to contribute to the initiation of interphase debonding. The increase in the elastic modulus or CTE of the interphase results in very large circumferential and axial stress values appearing in the interphase. When the elastic modulus in the interphase is heterogeneous, the predicted stress values in the fiber and matrix are similar to the results predicted with the equivalent elastic modulus of the interphases. However, the heterogeneous elastic modulus results in serious circumferential and axial stress gradients in the interphase.
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2

Sancaktar, E., and P. Zhang. "Nonlinear Viscoelastic Modelling of the Fiber-Matrix Interphase in Composite Materials." Journal of Mechanical Design 112, no. 4 (December 1, 1990): 605–19. http://dx.doi.org/10.1115/1.2912653.

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A nonlinear viscoelastic analysis of the carbon fiber-thermoset (or thermoplastic) matrix interphase is presented. The second order nonlinear partial differential equation governing the state of stress at the fiber-matrix interphase is solved by using an iterative scheme involving successive differentiation and Taylor expansions to satisfy the boundary conditions. Additional iteration is used for the case with nonlinear viscoelastic matrix material. The results reveal that the thickness and material properties of the interphase have strong influence in reducing the shear stress magnitudes and distribution along the fiber. The analysis and results provide valuable insight into the application and interpretation of the single fiber tension (fragmentation) test procedure and the design of “tailored interphases.”
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3

El Khoury, Diana, Richard Arinero, Jean-Charles Laurentie, Mikhaël Bechelany, Michel Ramonda, and Jérôme Castellon. "Electrostatic force microscopy for the accurate characterization of interphases in nanocomposites." Beilstein Journal of Nanotechnology 9 (December 7, 2018): 2999–3012. http://dx.doi.org/10.3762/bjnano.9.279.

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The unusual properties of nanocomposites are commonly explained by the structure of their interphase. Therefore, these nanoscale interphase regions need to be precisely characterized; however, the existing high resolution experimental methods have not been reliably adapted to this purpose. Electrostatic force microscopy (EFM) represents a promising technique to fulfill this objective, although no complete and accurate interphase study has been published to date and EFM signal interpretation is not straightforward. The aim of this work was to establish accurate EFM signal analysis methods to investigate interphases in nanodielectrics using three experimental protocols. Samples with well-known, controllable properties were designed and synthesized to electrostatically model nanodielectrics with the aim of “calibrating” the EFM technique for future interphase studies. EFM was demonstrated to be able to discriminate between alumina and silicon dioxide interphase layers of 50 and 100 nm thickness deposited over polystyrene spheres and different types of matrix materials. Consistent permittivity values were also deduced by comparison of experimental data and numerical simulations, as well as the interface state of silicone dioxide layers.
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4

Singh, Manohar, and Jeewan Chandra Pandey. "Probing thermal conductivity of interphase in epoxy alumina nanocomposites." Polymers and Polymer Composites 30 (January 2022): 096739112210774. http://dx.doi.org/10.1177/09673911221077489.

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The objective of this research is to determine the thermal conductivity of the interphase in epoxy alumina nanocomposites. First, TPS 500 measures the thermal conductivity of epoxy alumina nanocomposite samples. Following that, a numerical model based on the finite element method was developed to estimate the effective thermal conductivity of epoxy alumina nanocomposites over a range of assumed interphase thermal conductivity values. Finally, an algorithm is devised to extract the interphase’s thermal conductivity by combining simulation and experiment results. Interphase was found to have significantly higher thermal conductivity than the base polymer. A comprehensive analysis is presented to shed light on the observed increase in interphase thermal conductivity. The findings of this study will be critical for further investigation of heat transfer in epoxy alumina nanocomposites via modeling and simulation studies.
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5

Khanna, Sanjeev K., P. Ranganathan, S. B. Yedla, R. M. Winter, and K. Paruchuri. "Investigation of Nanomechanical Properties of the Interphase in a Glass Fiber Reinforced Polyester Composite Using Nanoindentation." Journal of Engineering Materials and Technology 125, no. 2 (April 1, 2003): 90–96. http://dx.doi.org/10.1115/1.1543966.

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Анотація:
Glass fiber reinforced polymer composites are widely used as structural materials. These two-component materials can be tailored to suit a large variety of applications. A better understanding of the properties of the fiber-matrix “interphase” can facilitate optimum design of the composite structure. The interphase is a microscopic region around the fiber and hence nano-scale investigation using nano-indentation techniques is appropriate to determine mechanical property variations within this region. In this study the atomic force microscope adapted with a commercial nanoindenter has been used to determine the variation of the elastic modulus across the interphase for different silane coated glass fiber reinforced polyester matrix composites. A comparative study of the elastic modulus variation in the various interphases is reported. The results are discussed in the light of the current limitations of the instrumentation and analysis.
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6

Vallat, M. F., S. Giami, and A. Coupard. "Elastomer-Elastomer Autohesion-Interphase Gradient of Elastic Modulus." Rubber Chemistry and Technology 72, no. 4 (September 1, 1999): 701–11. http://dx.doi.org/10.5254/1.3538827.

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Abstract The effect of migration on the vulcanizing ingredients is considered when two sheets of carbon black reinforced polyisoprene are brought into contact. Two formulations (conventional and efficient ones) are chosen. The formation of macroscopic interphases on both sides of the interface is shown by measurements of local modulus by microindentation. The local concentration of sulfur is determined by energy dispersive X-ray analysis. Near the interface, the modulus is always higher than in the bulk of the sheets although the interfacial strength may be quite low. Co-crosslinking of the chains in the interphase at the molecular level and macroscopic thick interphases are two important aspects of elastomer-elastomer joints.
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7

Baumgartner, Adi, Christy Ferlatte Hartshorne, Aris A. Polyzos, Heinz-Ulrich G. Weier, Jingly Fung Weier, and Ben O’Brien. "Full Karyotype Interphase Cell Analysis." Journal of Histochemistry & Cytochemistry 66, no. 8 (April 19, 2018): 595–606. http://dx.doi.org/10.1369/0022155418771613.

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Aneuploidy seems to play not only a decisive role in embryonal development but also in tumorigenesis where chromosomal and genomic instability reflect a universal feature of malignant tumors. The cost of whole genome sequencing has fallen significantly, but it is still prohibitive for many institutions and clinical settings. No applied, cost-effective, and efficient technique has been introduced yet aiming at research to assess the ploidy status of all 24 different human chromosomes in interphases simultaneously, especially in single cells. Here, we present the selection of human probe DNA and a technique using multistep fluorescence in situ hybridization (FISH) employing four sets of six labeled FISH probes able to delineate all 24 human chromosomes in interphase cells. This full karyotype analysis approach will provide additional diagnostic potential for single cell analysis. The use of spectral imaging (SIm) has enabled the use of up to eight different fluorochrome labels simultaneously. Thus, scoring can be easily assessed by visual inspection, because SIm permits computer-assigned and distinguishable pseudo-colors to each probe during image processing. This enables full karyotype analysis by FISH of single-cell interphase nuclei.
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8

Qin, Lizhe, Lanying Lin, Feng Fu, and Mizi Fan. "Microstructure and Quantitative Micromechanical Analysis of Wood Cell–Emulsion Polymer Isocyanate and Urea–Formaldehyde Interphases." Microscopy and Microanalysis 23, no. 3 (March 15, 2017): 687–95. http://dx.doi.org/10.1017/s1431927617000216.

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AbstractEmulsion polymer isocyanate (EPI) and urea-formaldehyde (UF) were selected as typical resin systems to investigate the microstructure of wood–adhesive interphases by fluorescence microscopy (FM) and confocal laser scanning microscopy (CLSM). Further, a quantitative micromechanical analysis of the interphases was conducted using nanoindentation. The FM results showed that the UF resin could penetrate the wood to a greater extent than the EPI resin, and that the average penetration depth for these two resin systems was higher in the case of latewood. CLSM allowed visualization of the resin distribution with contrasting colors, showing that the EPI resin could not penetrate the cell wall, whereas UF resin could enter the cell walls. The micromechanical properties of the cell walls were almost unaffected by EPI penetration but were significantly affected by UF penetration, especially in the first cell wall from the glueline. This further confirmed that only cell walls with resin penetration can improve the mechanical properties of the interphase regions.
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9

Geiss, Paul Ludwig, and Melanie Schumann. "Polymer Interphases in Adhesively Bonded Joints – Origin, Properties and Methods for Characterization." Materials Science Forum 941 (December 2018): 2249–54. http://dx.doi.org/10.4028/www.scientific.net/msf.941.2249.

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Анотація:
Chemically curing adhesives are formulations requiring reactions to convert from liquid to solid. Once cured, these adhesives carry the potential to create strong load bearing joints, resisting even severe detrimental service conditions. In adhesively bonded joints with chemically curing adhesives the term "interphase" relates to the adhesive volume adjacent to the surface of the adherent (interface), which generally will exhibit properties different from those of the adhesive bulk polymer. The properties of these interphases play an important role concerning the performance and durability of structural adhesive joints. Therefore localized strain analysis in the cross-section of shear-loaded adhesive joints was performed by combining a high-precision mechanical testing device with digital microscopy and by developing a method for preparing, marking, and digitally tracking the local deformations in micro shear specimen. Non-uniform shear profiles developing in the cross-section of the adhesive joints after exceeding the yield point serve as a sensitive indication for mechanical surface-affected interphase properties and it could be observed, that deranged crosslinking promotes strain softening of the polymer in the interphase. Infrared analysis of the cross-sectional interphase region in adhesively bonded joints was performed with a Bruker Tensor II Fourier Transform Infrared (FTIR) spectrometer equipped with a Hyperion 3000 microscope with a 20x ATR germanium crystal objective and a MCT-Focal-Plane-Array-Detector (FPA), allowing to conduct high resolution chemical imaging and localized chemical analysis.
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10

Chan, I. Tung, Tung Yang Chen, and Min Sen Chiu. "The Influence of Torsional-Rigidity Bounds for Composite Shafts with Specific Cross-Sections." Key Engineering Materials 462-463 (January 2011): 674–79. http://dx.doi.org/10.4028/www.scientific.net/kem.462-463.674.

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Анотація:
We consider the Saint-Venant torsion problem of composite shafts. Two different kinds of imperfect interfaces are considered. One models a thin interphase of low shear modulus and the other models a thin interphase of high shear modulus. The imperfect interfaces are characterized by parameters given in terms of the thickness and shear modulus of the interphases. Using variational principles, we derive rigorous bounds for the torsional rigidity of composite shafts with cross-sections of arbitrary shapes. The analysis is based on the construction of admissible fields in the inclusions and in the matrix. We obtain the general expression for the bounds and demonstrate the results with some particular examples. Specifically, circular, elliptical and trianglar shafts are considered to exemplify the derived bounds. We incorporate the cross-section shape factor into the bounds and show how the position and size of the inclusion influence the bounds. Under specific conditions, the lower and upper bounds will coincide and agree with the exact torsional rigidity.
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Більше джерел

Дисертації з теми "Interphase analysi"

1

Filippo, Miriam Di. "Analysis of the chromatin structure in interphase nuclei." Thesis, Open University, 2008. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.489905.

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This thesis is devoted to the characterization and detailed understanding of the base compositional patterns and the distribution of genes in the chromosomes of the chicken genome. Vertebrate chromosomes are organized into isochores, very long DNA segments (»300 kb) that are compositionally fairly homogenous, and characterized by different GC levels.
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2

Cimaszewski, Steven A. (Steven Andrew). "Statistical analysis of fiber composite interphase inverse problem." Thesis, Massachusetts Institute of Technology, 1994. http://hdl.handle.net/1721.1/35411.

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3

Svensson, Daniel, and Tomas Walander. "Evaluation of an Interphase Element using Explicit Finite Element Analysis." Thesis, University of Skövde, School of Technology and Society, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:his:diva-3895.

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A research group at University of Skövde has developed an interphase element for implementation in the commercial FE-software Abaqus. The element is using the Tvergaard & Hutchinson cohesive law and is implemented in Abaqus Explicit version 6.7 using the VUEL subroutine. This bachelor degree project is referring to evaluate the interphase element and also highlight problems with the element.

The behavior of the interphase element is evaluated in mode I using Double Cantilever Beam (DCB)-specimens and in mode II using End Notch Flexure (ENF)-specimens. The results from the simulations are compared and validated to an analytical solution.

FE-simulations performed with the interphase element show very good agreement with theory when using DCB- or ENF-specimens. The only exception is when an ENF-specimen has distorted elements.

When using explicit finite element software the critical time step is of great importance for the results of the analyses. If a too long time step is used, the simulation will fail to complete or complete with errors. A feasible equation for predicting the critical time step for the interphase element has been developed by the research group and the reliability of this equation is evaluated.

The result from simulations shows an excellent agreement with the equation when the interphase element governs the critical time step. However when the adherends governs the critical time step the equation gives a time step that is too large. A modification of this equation is suggested.

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4

Maierhofer, Christine. "Etablierung der Vielfarben Interphase FISH Dekonvolutions-Mikroskopie zur Einzelzell-Analyse." Diss., lmu, 2003. http://nbn-resolving.de/urn:nbn:de:bvb:19-16586.

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5

Laborie, Marie-Pierre Genevieve. "Investigation of the Wood/Phenol-Formaldehyde Adhesive Interphase Morphology." Diss., Virginia Tech, 2002. http://hdl.handle.net/10919/26411.

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This work addresses the morphology of the wood/ Phenol-Formaldehyde (PF) adhesive interphase using yellow-poplar. In this case, morphology refers to the scale or dimension of adhesive penetration into wood. The objective is to develop methods for revealing ever smaller levels of wood/resin morphology. Dynamic techniques that are commonly utilized in polymer blend studies are investigated as potential methods for probing the wood/ adhesive interphase morphology. These are Dynamic Mechanical Analysis (DMA) and solid state NMR using CP/MAS. PF resin molecular weight is manipulated to promote or inhibit resin penetration in wood, using a very low or a very high molecular weight PF resin. With DMA, the influence of PF resin on wood softening is investigated. It is first demonstrated that the cooperativity analysis according to the Ngai coupling model of relaxation successfully applies to the in-situ lignin glass transition of yellow-poplar and spruce woods. No significant difference in intermolecular coupling is detected between the two woods. It is then demonstrated that combining simple DMA measurements with the cooperativity analysis yields ample sensitivity to the interphase morphology. From simple DMA temperature scans, a low molecular weight PF (PF-Low) does not influence lignin glass transition temperature. However, the Ngai coupling model of relaxation indicates that intermolecular coupling is enhanced with the low molecular weight PF. This behavior is ascribed to the low molecular weight PF penetrating lignin on a nanometer scale and polymerizing in-situ. On the other hand, a high molecular weight resin with a broad distribution of olecular weights (PF-High) lowers lignin glass transition temperature dramatically. This plasticizing effect is ascribed to a small fraction of the PF resin being low enough in molecular weight to penetrate lignin on a nanoscale, but being too dispersed for forming a crosslinked network. With CP/MAS NMR, intermolecular cross-polarization experiments are found unsuitable to probe the angstrom scale morphology of the wood adhesive interphase. However, observing the influence of the PF resins on the spin lattice relaxation time in the rotating frame, HT1r, and the cross-polarization time (TCH) is useful for probing the interphase morphology. None of the resins significantly affects the cross-polarization time, suggesting that angstrom scale penetration does not occur with a low nor a high molecular weight PF resin. However, the low molecular weight PF substantially modifies wood polymer HT1r, indicating that the nanometer scale environment of wood polymers is altered. On the other hand, the high molecular weight PF resin has no effect on wood HT1r. On average, the high molecular weight PF does not penetrate wood on a nanometer scale. Interestingly, the low molecular weight PF resin disrupts the spin coupling that is typical among wood components. Spin coupling between wood components is insensitive to the high molecular weight PF. Finally, it is noteworthy that the two PF resins have significantly different T1r 's in-situ. The low molecular weight resin T1r lies within the range of wood relaxations, suggesting some degree of spin coupling. On the other hand, the T1r of the high molecular weight PF appears outside the range of wood relaxations. Spin coupling between the high molecular weight resin and wood components is therefore inefficient. The CP/MAS NMR and DMA studies converge to identify nanometer scale penetration of the low molecular weight PF in wood. On the other hand, the high molecular weight PF resin forms separate domains from wood, although a very small fraction of the PF-High is able to penetrate wood polymers on a nanoscale.
Ph. D.
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6

Giunta, Rachel K. "Durability of Polyimide/Titanium Adhesive Bonds: An Interphase Investigation." Diss., Virginia Tech, 1999. http://hdl.handle.net/10919/29449.

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When bonded joints are subjected to harsh environmental conditions, the interphase, the three-dimensional region surrounding the adhesive/substrate interface, becomes critically important. Frequently, failure occurs in this region after adhesively bonded systems are subjected to elevated temperature oxidative aging. In a previous study, this was found to be the case with a polyimide adhesive bonded to chromic acid anodized (CAA) Ti-6Al-4V. The objective of the current research has been twofold: 1) to investigate the effect of thermal aging on the interphase region of polyimide/titanium adhesive joints, and 2) to evaluate the method used in the current study for durability characterization of other adhesive/substrate systems. The method used in this research has been to characterize the effect of elevated temperature aging on the following systems: 1) Notched coating adhesion (NCA) specimens and 2) bulk samples of dispersed substrate particles in an adhesive matrix. The NCA test has the advantages of an accelerated aging geometry and a mode mix that leads to failure through the interphase, the region of interest. The bulk samples have the advantage of an increased interphase volume and allow for the application of bulk analysis techniques to the interphase, a region that is traditionally limited to surface analysis techniques. The adhesive systems studied consisted of one of two polyimide adhesives, LaRC⠢ PETI-5 or Cytec Fiberite⠢ FM-5, bonded to CAA Ti-6Al-4V. The model filled system consisted of a PETI-5 matrix with amorphous titanium dioxide filler. Through the use of the NCA test, it was determined that bonded specimens made with FM-5 lose approximately 50% of their original fracture energy when aged in air at 177°C for 30 days. This aging temperature is well below the glass transition temperature of the adhesive, 250°C. At the same time, the failure location moves from the anodized oxide layer to the adhesive that is directly adjacent to the substrate surface, the interphase region. Through surface analysis of this region, it is determined that the adhesive penetrates the pores of the CAA surface to a depth of 70 to 100 nm, promoting adhesion at the interface. With aging, the adhesive in the interphase region appears to be weakening, although analysis of the bulk adhesive after aging shows little change. This indicates that adhesive degradation is enhanced in the interphase compared to the bulk. Analysis of the model filled system gave similar information. Specimens containing titanium dioxide filler had glass transition temperatures that were approximately 20°C lower than the neat polyimide samples. In addition, the filled samples contained a significant portion of low molecular weight extractable material that was not present in the neat specimens. The tan delta spectra from dynamic mechanical thermal analysis of the filled specimens exhibited a shoulder on the high-temperature side of the glass transition peak. This shoulder is attributed to the glass transition of the interphase, a distinct phase of the polyimide which is constrained by adsorption onto the filler particle surfaces. As a function of aging time at 177° or 204°C, the shoulder decreases substantially in magnitude, which may relate to loss of adhesive strength between the polyimide and the filler particles. From this research, it has been illustrated that information relating to the durability of adhesively bonded systems is gained using an interfacially debonding adhesive test and a model system of substrate particles dispersed in an adhesive matrix
Ph. D.
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7

Fellah, Clémentine. "Influence de la nature des interfaces carbonées au sein des composites SiC/SiC à renfort Hi-Nicalon S et Tyranno SA3 sur leur comportement mécanique." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLEM078.

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Les composites SiC/SiC à interphase pyrocarbone (PyC) sont des candidats prometteurs en tant que matériau de gainage du combustible et de structure des réacteurs à neutrons rapides, constituant une alternative aux alliages métalliques. Leur comportement sous irradiation neutronique et leur caractère réfractaire sont de sérieux atouts en milieu irradiant. Néanmoins, les fibres et la matrice en carbure de silicium (SiC) sont, individuellement, des céramiques fragiles. L’intégrité des structures ne peut donc être assurée que si le composite acquiert une tolérance aux déformations. Cette tolérance n’est possible que grâce à la présence d’une interphase de pyrocarbone, entre la matrice et les fibres, assurant le rôle de déviateur de fissures. La capacité des composites SiC/SiC à résister à l’endommagement est dictée par le couplage fibre/matrice (F/M). L’intensité de ce couplage peut être influencée par de nombreux paramètres, tels que la rugosité et la physicochimie de surface du renfort. Les travaux faisant l’objet de cette thèse ont mis en évidence une couche de carbone en surface des fibres par microscopie électronique en transmission à haute résolution (METHR) et via des analyses physicochimiques de surface. Les caractéristiques de cette couche de carbone varient avec le procédé de fabrication des fibres. Son impact sur le couplage F/M a été appréhendé par l’observation des mécanismes locaux d’endommagement. La décohésion fibre/matrice a été étudiée en analysant par METHR les régions interfaciales des composites SiC/SiC ayant subi un essai mécanique. La compréhension de l’origine de cette couche de surface de fibres a permis de mieux connaitre les mécanismes locaux d’interaction. Ces mécanismes dépendent de la structure du carbone de surface des fibres dont découle le mode d’adhésion entre ce carbone de surface et l’interphase de pyrocarbone. Un traitement de surface sur un type de fibres a alors été développé, suggérant une légère amélioration du comportement mécanique des composites SiC/SiC élaborés à partir de ces renforts fibreux
SiC/SiC composites including the third generation SiC fibers with pyrocarbon interphase (PyC) are promising candidates to improve the safety of nuclear reactors, especially for core materials such as cladding and to replace metallic alloys for these applications. Their intrinsic refractory properties, their neutron transparency and their microstructural stability when irradiated or exposed to high temperatures make them attractive for nuclear applications. However SiC fibers and SiC matrix are brittle ceramics. The integrity of the structures can be fulfilled only if the composite is damage tolerant and can acquire a pseudo-ductile mechanical behavior. An interphase is deposited between the fibers and the matrix to provide this damage tolerance of SiC/SiC composites.The ability of SiC/SiC composites to sustain damage is dictated by the fiber/matrix (F/M) coupling mode. The intensity of this coupling can be related to many parameters such as the roughness and the chemistry of the surface of the reinforcement. A carbon layer on the fiberssurface was highlighted by High Resolution Transmission Electronic Microscopy (HRTEM) and by physico-chemical analyses. The characteristics of this carbon layer vary with the fabrication process of the fibers. The impact of this carbon layer on the F/M coupling was investigated by the observation of the local damage mechanisms. To elucidate the local bonding modes governing the damage mechanisms at the F/M interface of these SiC/SiC composites, macroscopic mechanical tests have been coupled with observations of structural modifications occurring in the interface region after loading. Understanding the origin of this carbon layer allowed elucidating the local interaction mechanisms according to these studied materials. These mechanisms depend on the carbon structure of the SiC fibers surface which in turn governs the adhesion between this carbon and the PyC interphase. Thanks to this study, a surface treatment on fibers was developed to optimize the mechanical behavior of SiC/SiC composites, whatever the fibrous reinforcement chosen
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8

Elmore, Jennifer Susan. "Dynamic mechanical analysis of graphite/epoxy composites with varied interphases." Thesis, This resource online, 1994. http://scholar.lib.vt.edu/theses/available/etd-10312009-020414/.

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9

Tillman, Matthew Scott. "Analysis and development of interphase matrices for use in thermosetting composites and adhesives /." Thesis, Connect to this title online; UW restricted, 2002. http://hdl.handle.net/1773/9921.

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10

Batty, Elizabeth. "PML nuclear bodies and the spatial analysis of interphase mammalian cell nuclear architecture." Thesis, Imperial College London, 2009. http://hdl.handle.net/10044/1/5573.

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Promyelocytic leukaemia nuclear bodies (PML NBs) are found within the nucleus of mammalian cells. Numbering between 10 and 30 per nucleus, they are an obvious feature of the nuclear landscape, yet their functions have still to be unambiguously defined. In the mammalian nucleus, compartmentalization of functions is apparent, as reflected in the wide-range of other nuclear compartments that can be identified. Quantification of relationships between PML NBs and other nuclear functional compartments is essential for a complete understanding of PML NB function. Initially, PML size, number, distance relationships, and spatial organisation in relation to each other, and the nuclear boundary and centroid, under the spatial point pattern theory hypothesis of Complete Spatial Randomness (CSR), were investigated in both normal and SV40 transformed MRC5 and WI38 human foetal lung fibroblasts. This was also completed in normal MRC5 cells treated with heat shock, and interferon β (both of which alter PML NB morphometrics), and also serum starvation. PML NBs appeared to locate according to CSR with respect to each other, and inter – PML distances were dependent upon median PML NB number per nucleus. PML NBs did not tend to associate with the nuclear centroid, and were repelled from the nuclear boundary in all cell lines and conditions. The distance and spatial organisation relationships between PML NBs and eleven different nuclear compartments were also compared and contrasted in the cell lines and conditions mentioned previously. PML NBs were shown to share strong distance and spatial organisation relationships with the 11S immunoproteasome regulator, SC35 domains, and transcriptional compartments in normal asynchronous nuclei, and with telomeres in transformed cells, highlighting likely functions for the bodies. Lastly, the three dimensional spatial preference of functional compartments in the nucleus was determined using an aggregate map, which provided a novel means to visualise the nuclear location of functional compartments in relation to each other, and under different cellular conditions. Spatial preference fell into four categories: 1) diffuse, 2) annular, 3) core, and 4) polar. Nucleoli and RNA polymerase maintained their spatial preference across cell lines and conditions, whereas other compartments showed altered spatial preferences. Interestingly, viral transformation led to global disorganisation of the nucleus, where most compartments (including PML NBs) reverted to a diffuse spatial preference.
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Книги з теми "Interphase analysi"

1

K, Grohmann Kleanthes, ed. InterPhases: Phase-theoretic investigations of linguistic interfaces. Oxford: Oxford University Press, 2008.

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2

American Chemical Society. Division of Analytical Chemistry, ed. Interfaces and interphases in analytical chemistry. Washington, DC: American Chemical Society, 2010.

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3

Analysis of interphase formed on the electrodes of lithium ion batteries. [Place of publication not identified]: Proquest, Umi Dissertatio, 2012.

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4

Alers, J. C. Interphase cytogenetic analysis of solid tumors by non-isotopic DNA in situ hybridization. Stuttgart: Gustav Fischer, 1996.

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5

Interphase Cytogenetic Analysis of Solid Tumors. Lubrecht & Cramer Ltd, 1998.

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6

Yurov, Yuri B., Svetlana G. Vorsanova, and Ivan Y. Iourov. Human Interphase Chromosomes: Biomedical Aspects. Springer, 2013.

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7

Yurov, Yuri B., Svetlana G. Vorsanova, and Ivan Y. Iourov. Human Interphase Chromosomes: Biomedical Aspects. Springer London, Limited, 2013.

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8

Yurov, Yuri B., Svetlana G. Vorsanova, and Ivan Y. Iourov. Human Interphase Chromosomes: Biomedical Aspects. Springer, 2015.

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9

Grohmann, Kleanthes K. InterPhases: Phase-Theoretic Investigations of Linguistic Interfaces. Ebsco Publishing, 2009.

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10

Ltd, ICON Group. INTERPHASE CORP.: Labor Productivity Benchmarks and International Gap Analysis (Labor Productivity Series). 2nd ed. Icon Group International, Inc., 2000.

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Частини книг з теми "Interphase analysi"

1

Oh, Ji Won, and Alexej Abyzov. "Analysis of Cell and Nucleus Genome by Next-Generation Sequencing." In Human Interphase Chromosomes, 35–65. Cham: Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-62532-0_3.

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2

Fitzer, E., and H. P. Rensch. "Carbon Fibre Surfaces and Their Analysis." In Controlled Interphases in Composite Materials, 241–54. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-7816-7_24.

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3

Maruyama, Benji, Enrique V. Barrera, Richard K. Everett, and Steve M. Heald. "Extended X-Ray Absorption Fine Structure Analysis Applied to Composite Materials." In Controlled Interphases in Composite Materials, 175–83. Dordrecht: Springer Netherlands, 1990. http://dx.doi.org/10.1007/978-94-011-7816-7_17.

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4

Fung, Jingly, Heinz-Ulli G. Weier, Roger A. Pedersen, and Horst F. Zitzelsberger. "Spectral Imaging Analysis of Metaphase and Interphase Cells." In FISH Technology, 363–87. Berlin, Heidelberg: Springer Berlin Heidelberg, 2002. http://dx.doi.org/10.1007/978-3-642-56404-8_29.

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5

Liehr, Thomas, and Nadezda Kosyakova. "Three-Dimensional Interphase Analysis Enabled by Suspension FISH." In Springer Protocols Handbooks, 385–92. Berlin, Heidelberg: Springer Berlin Heidelberg, 2016. http://dx.doi.org/10.1007/978-3-662-52959-1_41.

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6

Hunstig, Friederike, Marina Manvelyan, Samarth Bhatt, Ulf Steinhaeuser, and Thomas Liehr. "Three-Dimensional Interphase Analysis Enabled by Suspension FISH." In Fluorescence In Situ Hybridization (FISH) — Application Guide, 313–20. Berlin, Heidelberg: Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-540-70581-9_28.

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7

Hngand, H. H., and K. M. Knowles. "Faceting at ZnO-Bi2O3 Interphase Boundaries in ZnO-based Varistor Ceramics." In Electron Microscopy and Analysis 1997, 463–66. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003063056-120.

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8

Turan, S., and K. M. Knowles. "Orientation-dependent equilibrium film thickness at interphase boundaries in ceramic-ceramic composites." In Electron Microscopy and Analysis 1997, 483–86. Boca Raton: CRC Press, 2022. http://dx.doi.org/10.1201/9781003063056-125.

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9

Alessandri, C., and A. Tralli. "Sensitivity Analysis of Fibre-Reinforced Composites with Interphase Unilateral Constraints." In Solid Mechanics and Its Applications, 97–102. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-015-8494-4_13.

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10

Gupta, Preksha, Thais Lavagnolli, Hegias Mira-Bontenbal, and Matthias Merkenschlager. "Analysis of Cohesin Function in Gene Regulation and Chromatin Organization in Interphase." In Methods in Molecular Biology, 197–216. New York, NY: Springer New York, 2016. http://dx.doi.org/10.1007/978-1-4939-6545-8_12.

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Тези доповідей конференцій з теми "Interphase analysi"

1

Nazarenko, Lidiia, Aleksandr Chirkov, Henryk Stolarski, and Holm Altenbach. "Application of equivalent cylindrical inhomogeneity to modeling of CNT and analysis of influence of CNT distributions on response of functionally graded structural elements." In The 13th international scientific conference “Modern Building Materials, Structures and Techniques”. Vilnius Gediminas Technical University, 2019. http://dx.doi.org/10.3846/mbmst.2019.081.

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A mathematical model based on the concept of the energy-equivalent inhomogeneity combined with the method of conditional moments (MCM) has been applied to analyze Carbon Nanotube (CNT)-reinforced materials. The idea of the energy-equivalent inhomogeneity is to replace the inhomogeneity and its interphase by a single equivalent inhomogeneity. It is evaluated for cylindrical inhomogeneity with Gurtin-Murdoch surface model and spring layer model of interphases. Inclusion of multiple mechanisms in the description of interphases is applied to the CNT-reinforced materials. The CNT is modeled as a cylindrical high-stiffness surface. A weak zone surrounding the CNT can be modeled by a spring layer. In this case, one Gurtin-Murdoch and one spring layer models would need to be combined. To evaluate the effective properties of CNT-reinforced materials a statistical method, the MCM, has been employed which describes random distribution of CNT’s. Closed-form formulas for the components of the effective stiffness tensor of such composites have been developed. A composite plate weakened by a hole under different types of loading is considered. It is assumed, that the plate made of the polymer with randomly distributed and disoriented CNT’s. Analysis of how various special distributions of CNT concentration affect the response of this plate is performed.
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2

Parsa, A., and M. Mosavi Mashhadi. "An Inverse Numerical/Analytical Approach to Predict the Material Properties of Carbon Nanotube/Polymer Interphase." In ASME 2010 10th Biennial Conference on Engineering Systems Design and Analysis. ASMEDC, 2010. http://dx.doi.org/10.1115/esda2010-25320.

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There is substantial interest in using carbon nanotubes (CNTs) to create multifunctional polymer composite materials with outstanding mechanical, electrical, and thermal properties. A difficulty in modeling the behavior of these systems is the non-bulk interphase region in these systems that forms due to nanoscale interactions between the embedded NTs and adjacent polymer chains. However, the mechanical properties of this interphase region are unknown and very difficult to measure directly from experimental testing due to the size scale of this interphase region. Thus a three-phase (nanotube, interphase and matrix) Mori-Tanaka micromechanical model has been developed such that the properties of this interphase region can be inferred from macroscale elastic data. Both as-received and functionalized NTs have been considered in order to investigate the influence of functionalization on predicted mechanical properties of the interphase. A hybrid finite element-micromechanical method is also used to consider the effect of NT waviness in modeling. Results show that the Young’s modulus of interphase region is significantly higher than that of bulk polymer and it must be considered as an independent reinforcement mechanism in CNT/polymer nanocomposites.
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3

Seidel, Gary D., Kelli L. Boehringer, and Dimitris C. Lagoudas. "Analysis of Clustering and Interphase Region Effects on the Electrical Conductivity of Carbon Nanotube-Polymer Nanocomposites via Computational Micromechanics." In ASME 2008 Conference on Smart Materials, Adaptive Structures and Intelligent Systems. ASMEDC, 2008. http://dx.doi.org/10.1115/smasis2008-670.

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In the present work, computational micromechanics techniques are applied towards predicting the effective electrical conductivities of polymer nanocomposites containing aligned bundles of SWCNTs at wide range of volume fractions. Periodic arrangements of well-dispersed and clustered/bundled SWCNTs are studied using the commercially available finite element software COMSOL Multiphysics 3.4. The volume averaged electric field and electric flux obtained are used to calculate the effective electrical conductivity of nanocomposites in both cases, therefore indicating the influence of clustering on the effective electrical conductivity. In addition, the influence of the presence of an interphase region on the effective electrical conductivity is considered in a parametric study in terms of both interphase thickness and conductivity for both the well dispersed case and for the clustered arrangements. Comparing the well-dispersed case with an interphase layer to the same arrangement without the interphase layer allows for the assessment of the influence of the interphase layer on the effective electrical conductivities, while similar comparisons for the clustered arrangements yield information about the combined effects of clustering and interphase regions. Initial results indicate that there is very little influence of the interphase layer on the effective conductivity prior to what is identified as the interphase percolation concentration, and that there is an appreciable combined effect of clustering in the presence of interphase regions which leads to increases in conductivity larger than the sum of the two effects independently.
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4

YI, S. POLLOCK, G. AHMAD, and H. HILTON. "THERMO-VISCOELASTIC ANALYSIS OF FIBER-MATRIX INTERPHASE." In 34th Structures, Structural Dynamics and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 1993. http://dx.doi.org/10.2514/6.1993-1517.

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5

Yekani Fard, Masoud, Samuel Perrino, and Conor Hedman. "Stochastic Analysis of the Carbon Nanotube Network Interphase in Dry and Pre-Infused Buckypaper." In ASME 2022 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2022. http://dx.doi.org/10.1115/imece2022-95523.

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Abstract Assembling CNTs into a thin film Buckypaper (BP) effectively creates high CNT content nanocomposites. BP consists of entangled CNT networks with a porous 3D structure in which CNTs are randomly distributed. The interaction between the dispersed CNT and the polymer or between the CNT network and the surrounding polymer occurs via interphase. The interphase is the region between two constituents and has different local morphology and properties than the constituents. The morphology and properties of the interphase between the CNT network and polymer have not been given enough attention in the literature. Atomic Force Microscopy-based Peak Force Quantitative Nanomechanics Mapping (PFQNM) technique has been used to characterize the CNT network interphase at the nanoscale with high lateral resolution. Probe actual stiffness, tip radius, tapping force, deformation level, and deflection sensitivity for heterogeneous BP are discussed. The nano-scale material properties are extracted from the DMT contact mechanic’s model. The authors show that reduced modulus and deformation can examine the interphase zone thickness and properties. Weibull model is used to investigate the distribution of an interphase thickness and the size of the CNT network.
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6

Gibson, Joshua, Marco Siniscalchi, Sudarshan Narayanan, Trevor Binford, Jack Swallow, Pravin Didwal, Leanne Jones, et al. "Operando HAXPES probing solid electrolyte interphase growth through ultra-thin film electrodes." In Photoemission Spectroscopy for Materials Analysis II, edited by Rosa Arrigo, Robert Palgrave, and Philip D. King. SPIE, 2023. http://dx.doi.org/10.1117/12.2656826.

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7

Kulkarni, Shank S., Alireza Tabarraei, and Pratik Ghag. "Effect of Property of Interphase Layer on Damping Properties of Polymer Composites Using Sensitivity Analysis." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-10070.

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Abstract This work studies the damping property of Nanocomposites through simulating wave propagation using the Finite Element Method (FEM). For this purpose Representative Volume Element (RVE) of the composite material is created using Random Sequential Absorption (RSA) algorithm. Damping property is represented using the wave attenuation coefficient. The matrix material is assumed to be isotropic visco-elastic in nature with randomly dispersed stiff elastic spherical fillers. In order to model mechanical imperfections at the boundary of fillers and matrix, the interphase layer is modeled surrounding the spherical fillers. Determining the thickness and stiffness of this interphase region is a challenging task. Therefore this study aims at investigating the effect of variation in thickness and stiffness values of the interphase region on damping property of whole composite using sensitivity analysis. Two specific cases with a volume fraction of 5 % and 8.6 % are selected for sensitivity analysis. It has been found that both the thickness and stiffness of the interphase region plays an important role in deciding the damping properties of the polymer composite. Value of attenuation coefficient is more sensitive to the thickness of interphase than stiffness and hence it is important to choose the value of thickness correctly for accurate predictions.
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Smith, K. S. "Analysis and control of ASVC for interphase loadflow compensation." In Sixth International Conference on AC and DC Power Transmission. IEE, 1996. http://dx.doi.org/10.1049/cp:19960372.

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Bhide, R. S., and S. V. Kulkarni. "Analysis of parallel operation of converters with interphase transformer." In 2006 India International Conference on Power Electronics (IICPE 2006). IEEE, 2006. http://dx.doi.org/10.1109/iicpe.2006.4685366.

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10

Khanna, Sanjeev K., Robb M. Winter, P. Ranganathan, S. B. Yedla, and K. Paruchuri. "Investigation of Nanomechanical Properties of the Interphase in a Fiber Reinforced Plastic Composite." In ASME 2001 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/imece2001/pvp-25214.

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Abstract Glass fiber reinforced plastic composites are widely used as structural materials. These two phase materials can be tailored to suit a large variety of applications. A better understanding of the properties of the fiber-matrix ‘interphase’ can enable more optimum design of composites. The interphase is a microscopic region around the fiber and hence nano-scale investigation using nano-indentation techniques is appropriate to determine mechanical property variations. In this study the atomic force microscope with the Hysitron indenter has been used to determine the variation of the elastic modulus across the interphase for different silane coated glass fiber reinforced polyester composites. A comparative study of the elastic modulus variation in the interphase is reported. The results are discussed in the light of the current limitations of the instrumentation and analysis.
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Звіти організацій з теми "Interphase analysi"

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Jon J. Kellar, William M. Cross, and Lidvin Kjerengtroen. Final Report: Interphase Analysis and Control in Fiber Reinforced Thermoplastic Composites. Office of Scientific and Technical Information (OSTI), March 2009. http://dx.doi.org/10.2172/949227.

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2

Seidel, Gary D., Daniel Carl Hammerand, and Dimitris C. Lagoudas. Analytic and computational micromechanics of clustering and interphase effects in carbon nanotube composites. Office of Scientific and Technical Information (OSTI), January 2006. http://dx.doi.org/10.2172/902208.

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