Theoretical study of elementary processes in silicon germanium epitaxial growth on SI(100) and SI1 xGEx (100) surfaces
Theoretical study of elementary processes in silicon germanium epitaxial growth on SI(100) and SI1 xGEx (100) surfaces
... involving in silicon and silicon- germanium epitaxial growth on Si(100) and Si1- xGex( 100) surface are investigated at atomic level using first principle density functional theory(DFT) calculations and ... transition state 12 Introduction 1.1 Silicon and germanium in semiconductor 1.1.1 Silicon and silicon- germanium devices Silicon, the second richest element existing in common stone, has attracted ... THEORETICAL STUDY OF ELEMENTARY PROCESSES IN SILICON- GERMANIUM EPITAXIAL GROWTH ON SI(100) AND SI1- XGEX( 100) SURFACES QIANG LI (B.Sc., Nankai University) A THEISI SUBMITTED FOR THE DEGREE OF...
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Báo cáo khoa học: Theoretical study of lipid biosynthesis in wild-type Escherichia coli and in a protoplast-type L-form using elementary flux mode analysis potx
... detectable in the cell wall-free mutant These findings stand in contrast to a subsequent analysis of singlegene knockout data indicating that E coli can only survive if at least L1-P-EtAmine and a lipid ... synthesis of unsaturated and saturated fatty acids, phospholipids (including cardiolipin), and lipid A It is important to study the metabolism of the glucosamine-based lipid A, because it is a major ... substrates In contrast, side modes use products of interest as substrates An example of such a side mode is an EFM that converts lipid A into lipid A (ca) Redundancy as a main characteristic of the wild-type...
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Theoretical study of spin currents in semiconductors
... Generating Spin Currents and Polarization Spin currents are electronic currents with a finite spin polarization, i.e comprising of unequal numbers of spin- up and spin- down carriers In pure semiconductors, ... used as spin filters in which unpolarized input currents result in spin- polarized output currents However, nonmagnetic means of generating spin currents INTRODUCTION Datta-Das device (Ch 4) Spin relaxation ... is a promising source of dissipationless spin currents In this Thesis, we theoretically study several critical aspects of SC spintronics, with a focus on spin currents in the presence of SOC These...
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Báo cáo khoa học: Acute intermittent porphyria – impact of mutations found in the hydroxymethylbilane synthase gene on biochemical and enzymatic protein properties pdf
... single gene located on chromosome 11 [6], assigned to the segment 11q24.1-q24.2 of the long arm [7] The HMBS gene is divided into 15 exons of 3 9–4 38 bp in length and 14 introns of 8 7–2 913 bp in ... [23] activity of HMBS in cells when affected by acute intermittent porphyria These findings further support the causality of those mutations in the HMBS gene and their association with the AIP disorder ... side chains is well understood The position of the observed mutations in the 3D structure is shown in Fig The structure of the E coli homolog [14] and the mode of interaction with the cofactor...
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Báo cáo khoa học: Adenine and adenosine salvage pathways in erythrocytes and the role of S-adenosylhomocysteine hydrolase A theoretical study using elementary flux modes Stefan Schuster and Dimitar Kenanov ppt
... difficult to assess in vivo, is involved in these pathways Since adenine is a substrate of ADPRT, the elevation of ATP in the absence of adenosine kinase shows that adenine must be released in the process ... Thus, there 5281 A theoretical study using elementary flux modes S Schuster and D Kenanov Table Elementary modes producing ATP from adenine Elementary modes –ADA –AK –PNPase –ADPRT (5 PGI) (5 ALD) ... adenosine obtained in the second simulation and include methyltransferases and SAHH1 in addition Interestingly, some modes involve both SAHH1 and SAHH2 5283 A theoretical study using elementary...
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Theoretical study of the molecular processes occurring during the growth of silicon on si(100) and sixge1 x si(100
... THEORETICAL STUDY OF THE MOLECULAR PROCESSES OCCURRING DURING THE GROWTH OF SILICON ON Si(100) AND SiXGe1- X /Si(100) LIM CHIANG HUAY, FREDA (B.Sc (Hons.) NUS) A THESIS SUBMITTED FOR THE DEGREE ... atomic-scale processes occurring on the surface of a semiconductor during the molecular beam epitaxial growth of the material The focus of this work is on the molecular beam epitaxy of silicon using precursors ... 5.4 The positions of the silyl group ( ) and the hydrogen atom (◊) along the decomposition path to a) the intra-row configuration, and b) the on- dimer configuration The initial, transition and...
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Báo cáo hóa học: " Microscopic study of electrical properties of CrSi2 nanocrystals in silicon" potx
... density in the cap, resulting in virtual height increase in tapping-mode amplitude image In samples with NCs 50 nm deep below the surface, the morphology and the phase of the tapping-mode AFM of the ... limit of scanning capacitance microscopes J Phys D Appl Phys 2003, 36:598 doi:10.1186/1556-276X-6-209 Cite this article as: Dózsa et al.: Microscopic study of electrical properties of CrSi2 nanocrystals ... microscopy (XTEM) using the sample preparation method described in [7] Page of temperatures (not shown in the figures) The calculated doping profiles in the two type of samples are shown in Figure The...
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A study of politeness strategies in the conversational activities of the course book new cutting edge (elementary, pre intermediate and intermediate)
... from pre- intermediate to intermediate level (New Cutting Edge – Intermediate) These course books contain a lot of interaction activities with meaningful conversation in daily life In the part Real ... record politeness strategies 42 The chart shows that the percentage of politeness strategies in all conversations in the course book New Cutting Edge (Elementary, Pre – intermediate and Intermediate) ... activities of the course book "New New Cutting Edge" (Elementary, Pre – intermediate, Intermediate) Chapter presents the implications for learning and teaching politeness strategies for students at Quang...
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Theoretical study of carbon based materials and their applications in nanoelectronics
... THEORETICAL STUDY OF CARBON- BASED MATERIALS AND THEIR APPLICATIONS IN NANOELECTRONICS KAI-TAK LAM A THESIS SUBMITTED FOR THE DEGREE OF DOCTOR OF PHILIOSOPHY DEPARTMENT OF ELECTRICAL AND COMPUTER ... vii in obtaining GNRs by unzipping carbon nanotubes has made the prospect of fabricating GNR -based electronic devices in large quantities more promising and hence, detailed understanding of the ... Outreach group of the Department of Electrical and Computer Engineering for the opportunities in promoting science and engineering to the secondary and pre-university students and for the exposure...
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Theoretical study of spin dependent transport in nanoscale spintronic systems
... behind these results began to attract ever-growing interest In spintronic devices, the electron -transport is spin- dependent The theoretical study of spin- dependent transport (SDT) is to set up theoretical ... intensive interest since 1980s One of the most important aspects of the theoretical study of spintronics is to model the spin dependent transport (SDT) through these devices SDT naturally occur in spintronic ... CHAPTER Spin dependent transport in nanoscale CIP SVs 2.1 Introduction The theoretical study of spin dependent transport (SDT) in magnetic multilayers has attracted much research interest since...
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A detailed study of anodization current in ion irradiated silicon
... clamping increases the risk of breaking fragile wafers, and any inappropriate clamping may cause leakage of the electrolyte 2.2.2 Material analysis and morphology studies After ion irradiation ... anodization of ion irradiated Si Fig of [21] MEDICI plots of E-field during anodization in a region of Ω.cm wafer containing a line irradiated with a 2MeV proton of line fluence of (a) 2x106/cm; (b) ... (glass) patterning Chapter introduces silicon surface patterning, and the effects of amorphization, sputtering, reduction of work function are incorporated into the anodization current flow study...
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A quantitative study of colloidal fouling in membrane processes
... membrane by Loeb and Sourirajan in 1963 (Sourirajan, 1970; Sourirajan and Matsuura, 1985) The membrane industry has come a long way and today membranes are used in a vast array of fields Chapter ... strength, a fundamental parameter of water chemistry, was found to significantly exacerbate colloidal fouling Experimental data conclusively indicated that the colloidal fouling potential increased linearly ... Literature Review A review of the literature covering membrane processes, membrane fouling, as well as fundamental theories and principles of colloidal fouling and colloidal interactions are presented...
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Formation of ultra shallow junctions in silicon germanium by pulsed laser annealing
... process windows Laser annealing offers several advantages over conventional processing techniques: 1) the junction depth is defined by the amorphous/crystalline interface Laser annealing, combined ... and ultra- shallow junctions The degree of melting is determined by the extent of laser absorption and rate of heat dissipation, which are dependent on the substrate properties Laser annealing ... that laser annealing has a strong dependence on the thermal conductivity of the substrate used which causes a great challenge in maintaining the integrity of the strained-Si layer during shallow- melt...
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Báo cáo y học: "Comparative study of control selection in a national population -based case-control study: Estimating risk of smoking on cancer deaths in Chinese men"
... deaths TABLE Characteristics of cases and two control groups: Population- based case -control study of smoking on risk of cancer deaths among Chinese men 1989–1991 Characteristic Cases No of subjects ... sex-matched living spouse control design as an alternative control selection for a nationwide population- based case -control study is valid and feasible, and can produce highly acceptable research ... policy making when an answer is needed a short time The purpose of this study was to apply the basic principles of a population- based case -control study to assess the validation of the novel control...
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