electron charge and spin transport in organic and semiconductor nanodevices moletronics and spintronics
Charge and spin transport in graphene based devices
... for spin- up and spin- down charges The spin polarization in ferromagnetic material can be described as (2.2) and the net spin current is Since the net charge current is , the spin- up and spin ... using the spin degree of freedom of electron Having low spin orbit coupling, negligible hyperfine interaction and extremely high electronic quality make graphene a promising material for spintronics ... (ħ/2) and spin- down (-ħ/2) This interesting finding triggered the area of spintronics that focuses on the fundamental discoveries and new technologies by using the spin degree of freedom of electrons[5]...
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Optical time resolved spin dynamics in III-V semiconductor quantum wells
... have been distinguished by measuring electron spin relaxation in InGaAs/GaAs quantum wells The long spin lifetime implicates the NIA as the cause of the fast relaxation in InGaAs/InP Finally, the ... conduction band spin- splitting; and secondly, that scattering of the electron wavevector randomises somewhat the value of this field for each electron, causing a motional slowing of the rate of spin depolarisation ... and spin- orbit coupling lift the spin degeneracy [13] for electron states of finite wave vector (k) The spin- splitting can be represented by an effective magnetic field vector acting on the spin...
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CHARGE AND SPIN TRANSPORT STUDIES IN GRAPHENE AND BLACK PHOSPHORUS
... CHAPTER 1.1 INTRODUCTION SPINTRONICS Spin electronics3 or simply spintronics is a fast evolving technology that utilizes the intrinsic spin property of electron and its magnetic moment Spintronics ... showing the orthogonally aligned charge and spin currents; the longitudinal charge current induces a transverse spin current under spin Hall Effect due to an accumulation of spin- up and spin- down ... non-equilibrium spin accumulations in metallic and semiconductor systems by the spin Hall and inverse spin Hall Effects26–29 Increasing interests of spin transport in semiconductor systems can be attributed...
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Morphology and charge transport in polymer organic semiconductor field effect transistors
... oxygen and water molecules into the film more difficult, hence minimizing the doping of the polymer at the semiconductor- insulator interface 1.3 Nature of charge carriers The intrinsic motion of charge ... existence of disorder in the solutionprocessed thin films and electron- phonon coupling When a charge is introduced into the polymer chain, it causes a distortion in the chain and a polaron is formed ... which was explained by fewer defects due to folding in the lamellar, leading to a longer conjugation length and less perturbed interchain packing in longer chains This reduces the transport dependence...
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Báo cáo lâm nghiệp: "Effects of light intensity on the growth and energy balance of photosystem II electron transport in Quercus alba " potx
... examined (1) how growth dynamics and biomass allocation change with light levels and (2) to what extent light intensity influences the rate of electron transport by affecting photochemical and ... within the upper Piedmont physiographic region These germinated seeds were transplanted into 1.5 L plastic pots containing standard greenhouse potting substrate (Fafard 3B, Fafard Inc., Anderson, ... From the 263 surviving seedlings, 96 were randomly assigned and transplanted into twenty-four 57 L plastic pots (four seedlings per pot) that contained the same substrate Initially, all pots...
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Electrical spin injection and transport in two dimensional carbon materials
... geometry discussed in Section 2.6.3 (c) Schematic of electron spin injection and diffusion when the electrodes are in P configuration Injection of spin up electrons at electrode induces spin- up accumulation ... structure, spinorbit coupling in graphene, metal/graphene contacts, the importance of a contact barrier for spin injection, diffusion and detection in graphene spin devices, and other factors influencing ... high-efficient spin- injection techniques for injecting from spin polarized sources into carbon Both theoretical and experimental studies have shown that spin- injection efficiency between magnetic metal and...
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Salts Transport in Alkali Soil Reclamation by Gypsum and Prediction of Na Leaching in Field in China
... one In both cases, the Ca2+ concentration increased gradually from the beginning of leaching, decreased after a peak, and then increased and decreased again This behavior indicates that the initial ... the transport of salts such as cations (Na+, Ca2+, Mg2+ and K+) and Cl- in a column were investigated by using a tensiometer and a four-electrode sensor, and the amounts of these salts in soil and ... of amount of moisture infiltration in column infiltration experiment Changes in precipitation, evapotranspiration, and falling infiltration are shown in Fig 15 In April and May, evapotranspiration...
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Tài liệu Women, Development and Transport in Rural Eastern Cape, South Africa ppt
... community and its people Establishing and understanding gender differences in transport needs, access and planning is important, particularly in that men and women have different economic and socio-cultural ... travelling to and from the river, minutes of travelling for primary production purposes, and 52 minutes of travelling to and from the field In addition to this, 74 minutes are spent travelling to and ... dung, 45 minutes tending to the fire and 114 minutes (1 hour 45 minutes) preparing and cooking food Other household activities take an average of 211 minutes (3 hours 31 minutes), bringing the...
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Tài liệu Báo cáo khoa học: Characterization of electrogenic bromosulfophthalein transport in carnation petal microsomes and its inhibition by antibodies against bilitranslocase docx
... found to linearly depend on the addition of protein (2.6 ± 0.04 lmolÆmin)1Æmg protein)1, with lg valinomycin), as well as of K+ (6.25 ± 0.16 unitsÆmEq)1 K+, with lg valinomycin) and valinomycin (0.51 ... human ligandins: characterization of a binding-site peptide Biochim Biophys Acta 955, 296–300 52 Gregus Z & Klaassen CD (1982) Role of ligandin as a binding protein and as an enzyme in the biliary ... containing 29 lM BSP and increasing concentrations of sucrose After attainment of the steady state, lL (¼ lg) valinomycin was added Data (n ¼ 3) are means ± SEM and were fitted to a straight line...
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Tài liệu Báo cáo khoa học: Arsenite stimulated glucose transport in 3T3-L1 adipocytes involves both Glut4 translocation and p38 MAPK activity docx
... new elements of insulin signaling Insulin receptor substrate-1 and proteins with SH2 domains Diabetes 42, 643–650 White, M.F (1997) The insulin signalling system and the IRS proteins Diabetologia ... Chen, D., Fucini, R.V., Olson, A.L., Hemmings, B.A & Pessin, J.E (1999) Osmotic shock inhibits insulin signaling by maintaining akt protein kinase B in an inactive dephosphorylated state Mol Cellular ... steps in both arsenite- and insulin-induced glucose uptake: activation of p38 MAPK and tyrosine-phosphorylation of c-Cbl In contrast to insulin, arsenite does not activate PI-3¢ kinase (and consequently...
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Tài liệu Báo cáo Y học: Mutations in the docking site for cytochrome c on the Paracoccus heme aa3 oxidase Electron entry and kinetic phases of the reaction pptx
... native oxidase In focussing on the main interaction domain on subunit II, we introduced additional mutations in exposed residues in the relevant area above the CuA site (see Fig and Table 2), ... entry site: mutations in an exposed tyrosine (Y226F; see Table 1) and in a histidine (H119N; Table 2) show wild-type kinetics Biphasic steady-state kinetics Non-linear kinetics have been observed ... combining the standard purification in dodecyl maltoside [21], however, running the gel filtration step in the presence of Triton X-100 to dissociate subunits III and IV [24] Briefly, the following...
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Báo cáo khoa học: High negative charge-to-size ratio in polyphosphates and heparin regulates factor VII-activating protease pdf
... heparin and N-acetyl heparin promote an increase in FSAP activity rather than inhibiting it Thus, polyanion binding to SERPINs, over and above their binding to FSAP, plays a decisive role in mediating ... sulfate and hyaluronic acid, showed no competition, indicating no binding to FSAP (Fig 1C, lower panel, and Fig S3A) Thus, using gel-shift and competition binding assays, it was demonstrated that binding ... unfractionated heparin, and exhibits weak FSAP binding and activation Mast cell-derived heparin has a higher charge than unfractionated heparin, and exhibits a stronger ability to bind to and activate...
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Báo cáo khoa học: Protein transport in organelles: The composition, function and regulation of the Tic complex in chloroplast protein import pptx
... fast membrane binding and integration into the Tic complex Reducing conditions on the other hand lead to solubilization into the stroma and increased interaction with its other known interaction ... N-terminal half of the protein, including the dehydrogenase domain Specific binding of the FNR is mediated by a unique series of proline/serine-rich repeat motifs located in the C-terminus For the integration ... involved in protein–protein interaction are blue and the dehydrogenase domains of Tic32 and Tic62 are shown in green Tic110 contains two transmembrane domains at the proximal N-terminus The topology...
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Báo cáo khoa học: Protein transport in organelles: Protein transport into and across the thylakoid membrane pptx
... proteinaceous insertion machinery Other singlespanning proteins have also been suggested to use this membrane integration route, including the photosystem II subunits, PsbW and PsbX In describing ... N-terminal basic region, a hydrophobic central core and a polar C-terminal region ending in an Ala-X-Ala terminal processing site Proteins destined to be transported by the Tat pathway contain a ... immediate vicinity of the twin arginine motif, whereas Hcf106 cross-links less strongly to residues in the hydrophobic core and the early mature protein [32] Binding of the precursor can occur in the...
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Báo cáo khoa học: Protein transport in organelles: Dual targeting of proteins to mitochondria and chloroplasts ppt
... mitochondrial and chloroplastic targeting signals in terms of arginine and serine content (i.e not as high as in mitochondrial targeting signals) and may be slightly enriched in hydrophobic residues In ... provided, and the insights that may be gained from a greater understanding of the mechanism of dual targeting for the targeting of location-specific proteins is discussed Targeting signals and mature ... split [30], and is present in several plant species (see Table S1) The RPS16 protein gives an interesting insight into the evolutionarily history of dual targeting In both Arabidopsis and Oryza...
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![Báo cáo khoa học: Epoxidation of benzo[a]pyrene-7,8-dihydrodiol by human CYP1A1 in reconstituted membranes Effects of charge and nonbilayer phase propensity of the membrane pot](https://media.store123doc.com/images/document/14/rc/ld/small_ldo1394248806.jpg)
Báo cáo khoa học: Epoxidation of benzo[a]pyrene-7,8-dihydrodiol by human CYP1A1 in reconstituted membranes Effects of charge and nonbilayer phase propensity of the membrane pot
... 0.9, and molar lipid/protein ratio of 1200 The intra- and interday degree of variation in relative P450, reductase, and lipid content did not exceed 10% in any of the vesicular preparations Finally, ... Branched phosphatidylcholines stimulate activity of cytochrome P450SCC (CYP11A1) in phospholipid vesicles by enhancing cholesterol binding, membrane incorporation, and protein exchange J Biol Chem ... dependence on the phospholipid charge and the type of lipid used For instance, Vmax for (–)-7,8-diol oxidation to DE2 was about 33 pmolÆmin)1Æpmol)1 in vesicles containing PtdSer This rate is very...
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Báo cáo khoa học: Knock-out of the chloroplast-encoded PSI-J subunit of photosystem I in Nicotiana tabacum PSI-J is required for efficient electron transfer and stable accumulation of photosystem I pot
... binding site for either Pc or Cyt c6 and was explained by a displacement of this domain Thus, PSI-J does not appear to participate directly in binding of Pc or Cyt c6, but plays a role in maintaining ... purpurea (PORPU)] and cyanobacteria [Synechcoccus elongatus (SYNEL) and Prochlorococcus marinus (PROMA)] Amino-acid residues involved in Chl binding [W (Trp), E (Glu) and H (His)] are indicated with ... obtained using chemical oxidation and reduction of P700 (data not shown) This clearly indicates an % 20% reduction in P700 in plants lacking PSI-J To investigate this by an independent method and...
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Báo cáo khoa học: Enzymes in organic media Forms, functions and applications potx
... subtilisin in the presence of 98% (w/w) of KCl was tentatively explained by either rigid salt structure protecting the enzyme in organic solvents or polar environment of salt helping in maintaining ... is in environmental control and analysis [95] Russell et al [96] showed that antigen–antibody interaction is possible in low water containing organic solvents Stocklein et al [97] studied binding ... Antibody-antigen binding in organic solvents Biochem Biophys Res Commun 158, 80–85 Stocklein, W., Gebbert, A & Schmid, R.D (1990) Binding of triazine herbicides to antibodies in anhydrous organic solvents...
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Báo cáo khoa học: cGMP and glutathione-conjugate transport in human erythrocytes The roles of the multidrug resistance-associated proteins, MRP1, MRP4 and MRP5 pot
... overnight in 3% (w/v) bovine serum albumin The filters were rinsed with mL of ice-cold stop solution and the tracer retained on the filter was determined by liquid scintillation counting All transport ... transport and that vincristine inhibits the high affinity DNP-SG transport in the presence but not in the absence of GSH [12,45,46] Thus the effect of vincristine on the cGMP uptake was also tested in ... appear to be incompatible with transport via MRP5 CGMP transport is inhibited by anion transport inhibitors, PKC inhibitors and IBMX Because substrates for MRPs are often organic anions, inhibitors...
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