biological matter in electric field
Dielectrics in electric fields (1)
Ngày tải lên :
21/03/2014, 12:08
... modern dielectric theory and engineering, including the lastest analysis and modeling techniques As the editor of the Power Engineering Series, I am proud to include Dielectrics in Electric Fields ... 1.4.1 A dielectric sphere immersed in a different medium 1.4.2 A rigid dipole in a cavity within a dielectric 1.4.3 Field in a dielectric due to a conducting inclusion 1.5 The tunneling phenomenon ... that influence the conduction currents in experiments are outlined in Chapter Chapters deals with the fundamental processes in gaseous electronics mainly in uniform electric fields and again,...
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dielectrics in electric fields (2)
Ngày tải lên :
21/03/2014, 12:08
... form given by (1.3) 4.3 FIELD IN A DIELECTRIC DUE TO A CONDUCTING INCLUSION When a conducting sphere is embedded in a dielectric and an electric field E is applied the field outside the sphere ... of radius R and a dielectric constant 82 The sphere is situated in a dielectric medium extending to infinity and having a dielectric constant of S] and an external electric field is applied along ... sphere, at constant electric field intensity If we define a quantity, polarizability, a, as the induced dipole moment per unit electric field intensity, then a is a scalar quantity having the units...
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dielectrics in electric fields (3)
Ngày tải lên :
21/03/2014, 12:08
... internal field is calculated as shown in the following section 2.3 THE INTERNAL FIELD To calculate the internal field we imagine a small spherical cavity at the point where the internal field is ... to the inaccuracy caused by neglecting the reaction field which was introduced in chapter The field which acts upon a molecule in a polarized dielectric may be decomposed into a cavity field and ... which coincides with the nucleus, the charge density decreasing with increasing radius from the center When the atom is situated in an electric field the charged particles experience an electric...
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dielectrics in electric fields (4)
Ngày tải lên :
21/03/2014, 12:08
... particularly in long chain polymers, a linear configuration Further, in the solid phase the dipoles are more likely to be interactive and not independent in their response to the alternating field7 ... n increases s' changes with increasing COT, the curves crossing over at COT = At n=l the change in s' with increasing COT is identical to the Debye relaxaton, the material then possessing a single ... equal in the absence of an external electric field Electric Field a* d I position Fig 3.5 The potential well model for a dipole with two stable positions In the absence of an electric field (foil...
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dielectrics in electric fields (5)
Ngày tải lên :
21/03/2014, 12:08
... The screening effect can not follow instantly the hopping charge but attains a time averaged occupancy between the two sites The electric field influences the occupancy rate; down -field rate ... presence of dipoles in the vicinity Because the dipoles have finite length in real dielectrics they are more rigidly fixed, as in the case of a side group attached to the main chain of a polymer ... vibrations One, along the line joining the equilibrium positions of the charges, called longitudinal optic mode (LO) and another, in a plane perpendicular to the line joining the equilibrium positions...
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dielectrics in electric fields (6)
Ngày tải lên :
21/03/2014, 12:08
... chlorinated PVC (CPVC) with chlorine content increasing in the range 60-65% During chlorination, the chlorine replaces the hydrogen atoms in CH2 units rather than in the CH—Cl units Chlorination increases ... in the crystalline region, or to p-loss? Such questions frequently arise in dielectric studies in interpreting experimental data Since the peak value of B" increases with decreasing crystallinity ... along the chain at intervals of about 100 main units Branches of approximately the main chain length may also exist at intervals of a few main chain lengths The degree of chain branching changes...
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dielectrics in electric fields (7)
Ngày tải lên :
21/03/2014, 12:08
... domain to the frequency domain involves the assumption that the current is measured in the interval to infinity, which is not attained in practice The necessity to truncate the integral to a finite ... the electric field The new traps that are created permit more injection resulting in an increase of the current Such an increase in the number of traps is likely to saturate after a certain time ... current-time relationship in polymers 6.7.1 ARAMID PAPER Aramid Paper which is an aromatic polyamide is a high temperature insulating material and finds increasing applications in electrical equipment...
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dielectrics in electric fields (8)
Ngày tải lên :
21/03/2014, 12:08
... the electric field The influence of electric field on current in sPP is shown in fig 7.7 Ohmic conduction is observed at field strengths below 10 MV/m, and for higher fields the current increases ... fact that transport occurs within interchain of the molecule rather than within intrachain The mobilitiy of electrons in polymers is ~ 10"'° m2 V'V1 and at electric fields of 100 MV/m the drift ... electrode into unoccupied levels of the dielectric even though the electric field is not too high Field emission and field assisted thermionic emission also inject electrons into the dielectric...
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dielectrics in electric fields (9)
Ngày tải lên :
21/03/2014, 12:08
... — ion recombination AB In considering recombination many of these processes have to be taken into account acting in combination and the decrease of electron density due to recombination has led ... E/N the energy for generating an ion-pair is a minimum resulting in a minimum sparking potential of the gas I.2A ASYMPTOTE - = • ORIGIN TANGENT LINE 0.8 A C Q STOLETOW POINT 0.6A !•«= f = 368A 0.4A ... is obtained by finding the inverse Laplace transforms of equations (8.43) and (8.44) The details of computation are explained in the following section 8.5.3 Formative Time Lags in Cylindrical...
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dielectrics in electric fields (10)
Ngày tải lên :
21/03/2014, 12:08
... Configuration Decreasing Decreasing Decreasing & increasing Decreasing & increasing Field Slope Two one Four one (Liu and Raju, 1992; with permission of IEEE ©.) In considering the effects of non-uniformity ... Laplacian electric field due to the space charges are also shown Close to the point there is intensification of the field due to the positive ions and a corresponding reduction in the field in the ... discharge continue to draw interest Corona is a self sustained electrical discharge in a gas where the Laplacian electric field confines the primary ionization process to regions close to high field...
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dielectrics in electric fields (11)
Ngày tải lên :
21/03/2014, 12:08
... in aramid paper Poling field and heating rate: A 7.9 MV/m, K/min; • 11.8 MV/m, K/min.; O 7.9 MV/m, K/min.; Q 3.9 MV/m, 2K/min.; A MV/m, 2K/min.; • 7.9 MV/m, K/min.; X i K/min (Raju, 1992, with ... coefficients depend on the nature of the material; retrapping is dominant in dielectrics whereas recombination with light output dominates in thermoluminiscent materials Conduction level Forbidden energy ... measurements with heating rate of p T&V Windowing Polarization Fig 10.5 Protocol for windowing TSD Note the additional detail in the region EFGH Tp and Td are poling and window temperatures respectively...
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dielectrics in electric fields (12)
Ngày tải lên :
21/03/2014, 12:08
... scattered mainly in the forward direction The electrons move a certain distance within the dielectric, building up a space charge density and an internal electric field which may be quite intense ... for determining P(;c) involves the following steps: The integral sign in equation (11.26) may be replaced by a summation by dividing the film into n incremental thickness, each layer having its ... thermal pulsing experiment in the double metallizing and single metallizing configurations (Collins, 1980, Am Inst Phys.) The observed properties of the electret are in general related to the internal...
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Biological Alteration of Zinc Complexation Characteristics of Dissolved Organic Matter in Domestic Wastewater Treatment Plant Effluent under River Water Environment
Ngày tải lên :
05/09/2013, 10:15
... DOM in the original river water sample seems to fit into two linear portions indicating two classes of binding sites In contrast, DOMs in the samples after and weeks fitted to a single line, ... of zinc binding sites in river water DOM Fig represents the variation of DOC, UV254 and SUVA during the river water incubation for weeks in the preliminary study During the first days of incubation, ... signifying only one type of binding site It seems that the weak type of binding site in the river water DOM might have been degraded by biological activities On the other hand, total ambient binding...
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Báo cáo hóa học: " Gold colloidal nanoparticle electrodeposition on a silicon surface in a uniform electric field" pdf
Ngày tải lên :
20/06/2014, 22:20
... using a reversed electric field or dipping the sample into a basic or acid bath Following such treatment, no change in the surface density of the Cathode Colloidal suspension Pt/Ir Colloid O-Ring ... was investigated and analyzed in relation to several parameters such as voltage, the electric field, and the charge exchanged Deposition was found to be associated with a minimum electric field ... suspended in the solution Particle transport is governed solely by Brownian’s motion with random displacement Under the influence of an electric field, particle motion occurs in a direction determined...
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Báo cáo hóa học: " Research Article Electroelastic Wave Scattering in a Cracked Dielectric Polymer under a Uniform Electric Field" doc
Ngày tải lên :
21/06/2014, 20:20
... Value Problems y Incident waves γ −a x O a E0 Figure 1: Scattering of waves in a dielectric medium with a Griffith crack The electric field equations 3.3 are satisfied by introducing an electric potential ... the first kind The value of Ka u, s for u < s is obtained by interchanging u and s in 4.43 4.1.3 Mode I Dynamic Singular Stresses Near the Crack Tip The mode I dynamic electric stress intensity ... is an in nite integral that has a rather slow of convergence To improve this problem the in nite integral is converted into integrals with finite limits Thus, for the calculation of the integral,...
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Báo cáo hóa học: " Rapid Concentration of Nanoparticles with DC Dielectrophoresis in Focused Electric Fields" pot
Ngày tải lên :
22/06/2014, 00:20
... delicate insulating structure constructed in a channel for the purpose of field focusing (Fig 1) A simple and effective field-focusing insulator structure is shown in Fig 1a, which 123 (a) Insulating ... field Insulators Outlet Fig a Diagram of a simple design for field focusing via insulator posts The electric field (E) is indicated with field lines b An insulating ‘tree’ structure for rapid electric ... illustrating the fabrication of the microfluidic device containing PDMSinsulating microstructures Microfabrication and Experimental Setup The microfluidic device containing the insulating microelectrodes...
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The trend of globalization in every field
Ngày tải lên :
05/04/2013, 21:13
... hard in pronouncing every single sound In addition, it would be impossible to maintain a regular rhythm and speed if speakers are to put certain consonant sounds together * Linking and intrusion ... for reading, three for writing, and four for speaking and pronunciation) The pronunciation lesson is incorporated into speaking lesson and lasts one period, accounting for 45 minutes In each ... materials, as well as listening and imitating phases during the lessons Regarding methods of language teaching in general and their philosophy of pronunciation teaching in particular, it can be...
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Improvement of Water Quality by Removal of Suspended Solids and High-speed Biological Filtration in Closed Water Body
Ngày tải lên :
05/09/2013, 08:40
... experiment was carried out in the field, some disturbances such as typhoon, heavy rain and windy day were met These disturbances had influence on temperature, SS, turbidity and the inflow of water, but ... were dissolved in this plant Experiment was carried out from 29 August 2002 to 17 October 2002 During this period, one typhoon, one heavy rain and one windy day were met Little influence of these ... very small animals alive Since the ecosystem is made around biological medium, organic particles could be degraded biologically at high speed HRT was set up at 10 minutes in this experiment, but...
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