oxygen silicon and sulfur
Nature of the band gap of silicon and germanium nanowires
... 0) and (1 1) Ge nanowires with D$20 A of the band gap and determines the overall nature of the nanowire band structure Si (100) Ge (100) where mà and mà are the effective masses in the x and ... G2X bulk band gap The Ge nanowires converge towards different band gaps: (1 0) towards the G2L gap, whereas (1 0) and (1 1) nanowires converge towards the G2X value Figs and show the band dispersion ... the G2X bulk band gap, whereas the zone centre band gaps for (1 0) and (1 0) Ge nanowires clearly converge to different bulk band gap values The (1 0) gap converges towards the G2X band gap, while...
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First principles optical properties of silicon and germanium nanowires
... Optical gaps in SiNWs and GeNWs: quantum confinement and anisotropy effects In this section, we will describe the electronic properties of hydrogen passivated, free standing silicon and germanium nanowires ... gap in SiNWs (left) and GeNWs (right) as a function of wires’ size and orientation Table DFT-LDA electronic gaps in SiNWs and GeNWs are reported, respectively, in the third and fourth column, ... (NMP4-CT-2004-500198), and by MIUR through NANOSIM and PRIN 2005 We acknowledge the CINECA CPU time granted by INFM We are grateful to Andrea Marini for useful discussions and for providing us...
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Báo cáo khoa học: Oxygen binding and its allosteric control in hemoglobin of the primitive branchiopod crustacean Triops cancriformis pdf
... combinations of · and · with one (h ¼ 1) oxygenation-linked acid group and half (m ¼ 0.5) a Mg2+-binding site per oxygen- binding site For both combinations, · and · 4, the oxygen- binding and allosteric-equilibrium ... 7.0 and pH 8.0 corresponded to the overall heats of oxygenation of )51.3 and )45.6 kJỈmol)1, respectively, which include the heat of oxygen dissolution and the heat of proton dissociation from oxygenation-linked ... absorbance relative to the values for the fully oxygenated and fully deoxygenated samples, i.e those equilibrated with pure oxygen and nitrogen, respectively Oxygen- binding curves of purified Hb were...
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báo cáo hóa học: " Relationship between oxygen supply and cerebral blood flow assessed by transcranial Doppler and near – infrared spectroscopy in healthy subjects during breath – holding" doc
... and Rehabilitation 2006, 3:16 Background Unlike the other organs, human brain needs a constant oxygen supply in order to maintain its functional and structural integrity The local amount of oxygen ... the correct oxygenation levels This mechanism has to provide oxygen during both resting condition and focal cortical activity The strict coupling existing between "activation", local oxygen consumption, ... lead to uncertainties and poor comprehension of the VMR itself The aim of the study is the analysis of the relationship between oxygen supply and CBFV as detected by TCD and NIRS in healthy subjects...
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Báo cáo hóa học: " Photoinduced oxygen release and persistent photoconductivity in ZnO nanowires" pdf
... between desorbed and adsorbed oxygen Oxygen desorbs in vacuum at the same rate as in air, but since the oxygen is readily pumped out, it cannot be re-adsorbed [32] Thus, the surface oxygen can be ... to oxygen desorption as well However, the slow and prolonged nature of this second process suggests that this oxygen is more tightly bound Could it be lattice oxygen? The idea of lattice oxygen ... adsorbed oxygen molecules trap electrons, gradually bending the bands, raising the surface potential barrier and the internal field This reduces electron trapping at the surface, thereby reducing oxygen...
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Báo cáo hóa học: " Silicon and Germanium Nanostructures for Photovoltaic Applications: Ab-Initio Results" pptx
... nanostructures, and for the use of excess thermal generation to enhance voltages or carrier collection [7] Moreover recently also silicon and germanium nanowires have been used and envisaged for ... we apply DFT and MBPT to the calculation of the structural, electronic and optical properties of two classes of systems: pure and alloyed Si/Ge nanocrystals (NCs) embedded in wide band gap SiO2 ... ‘‘Ab-initio Methods: DFT and MBPT’’, it is well known that the DFT-LDA severely underestimates the band gaps for semiconductors and insulators A correction to the fundamental band gap is usually obtained...
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Báo cáo toán học: "OXIDATIVE PHOSPHORYLATION: Kinetic and Thermodynamic Correlation between Electron Flow, Proton Translocation, Oxygen Consumption and ATP Synthesis under Close to In Vivo Concentrations of Oxygen" docx
... the O2 electrode and its reference The output of both the oxygen electrode and luminometer were suitably modified by changing the amperage and/ or the voltage and fed into a KIPP and ZONEN multi-channel ... JW and Bustamante E Preparation and Characterization of Mitochondria and Submitochondrial Particles of Rat Liver and Liver-Derived Tissues Methods Cell Biol 1978; 20: 411-81 11 Napolitano MJ and ... line and the top of the trace (see Figs 1b and 2) This distance was then compared with standard curves constructed by adding different levels of ATP to air-saturated mediums in the presence and...
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báo cáo khoa học: " Reactive oxygen species and transcript analysis upon excess light treatment in wild-type Arabidopsis thaliana vs a photosensitive mutant lacking zeaxanthin and lutein" pps
... wild-type and mutant leaves with highly specific ROS-sensor probes: singlet -oxygen sensor green (SOSG) for 1O2, dichlorofluorescein (DCF) for H2O2 and OH., and proxyl-fluorescammine (ProxF) for O - and ... -80°C Ascorbate and glutathione were extracted and assayed following the method developed by Queval and Noctor [119] ATP and ADP were assayed as previously described [120] Amino acids and sugars were ... AA and ER participated in the RNA isolation, microarray experiments and statistical analysis of data, quantitative real-time PCR; LC and RB conceived the study and participated in its design and...
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Báo cáo y học: " Reduced peak oxygen uptake and implications for cardiovascular health and quality of life in patients with schizophrenia" ppsx
... 33.7±10.4 years and 35.9±11.5 years in men and women, respectively The total PANSS, total positive PANSS and total negative PANSS score was 65±17, 15±6 and 17±8 in men, and 68±23, 16±6 and 18±8 in ... GM, J Hel, J Ho and J Heg designed the study J Heg and GEN recruited patients, performed VO2peak testing and other data acquisition GM and J Heg undertook the statistical analysis and J Heg wrote ... dose and quality of life: a randomized controlled trial Arch Intern Med 2009, 169:269-278 23 Figure legends Figure Peak oxygen uptake in patients with schizophrenia and normative healthy men and...
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báo cáo khoa học: " Differential patterns of reactive oxygen species and antioxidative mechanisms during atrazine injury and sucrose-induced tolerance in Arabidopsis thaliana plantlets" ppsx
... Singlet Oxygen Sensor Green®; DW: dry weight Authors' contributions FR, CS, MB, IC and GG conceived the study and designed experiments FR, MB and GG performed the experiments FR, CS, MB, IC and GG ... measured at 663 nm, 646 nm and 470 nm Levels of chlorophyll and total carotenoids (xanthophylls and carotenes) were determined from the equations given by Lichtenthaler and Wellburn [72] Measurements ... hours to the different control and treatment media described above (M, S, MA and SA) Plantlets, prior to the transfer and at the end of the treatment, were immersed and infiltrated under vacuum...
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Báo cáo khoa học: "Bench-to-bedside review: Oxygen debt and its metabolic correlates as quantifiers of the severity of hemorrhagic and posttraumatic shock" pptx
... Rixen and Siegel Headings (MESH) terms, as well as being searched for as text items The following combinations were studied: oxygen debt’ or oxygen deficit’ and ‘hemorrhagic shock’, ‘lactate’ and ... Schultz [52] and Powell [53] and their groups studied bacterial translocation and restoration of central venous oxygen saturation after BDguided hemorrhagic shock in rats Also, DeAngeles and coworkers ... failure and mortality after trauma Am J Emerg Med 1995, 13:619-622 104 Ivatury RR, Simon RJ, Havriliak D, Garcia C, Greenbarg J, Stahl WM: Gastric mucosal pH and oxygen delivery and oxygen consumption...
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Báo cáo khoa học: "The concentration of oxygen, lactate and glucose in the central veins, right heart, and pulmonary artery: a study in patients with pulmonary hypertension" ppt
... mean arterial pressure, and cardiac index Table shows individual SO2 and [Lac] measured at each sampling site, and Figure shows graphs of mean ± standard error values for SO2 and [Lac] There were ... IVC and SVC SO2 levels at the IVC and SVC were greater than that at the pulmonary artery (P < 0.01) and were greater than SO2 at the right atrium and right ventricle sites (P < 0.01 for IVC and ... development of ΔSO2 and Δ[Lac], as noted in this patient population The average concentrations of oxygen and lactate in SVC and IVC blood were indistinguishable from each other Moreover, SO2 and [Lac]...
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Báo cáo y học: "Association between administered oxygen, arterial partial oxygen pressure and mortality in mechanically ventilated intensive care unit patients" doc
... mechanical ventilation and the oxygenation targets may influence the outcome for patients Traditionally, arterial oxygen concentration (measured as partial oxygen pressure, PaO2) and oxygen saturation ... lowest partial oxygen presStandardised mortality ratio (SMR) byby(FiO2) ratio (kPa) in the first 24 Standardised care unit in inspired lowest partial oxygen pressure h after intensive of oxygen (ICU) ... Baboons exposed to 100% oxygen demonstrated a progressive reduction in forced vital capacity and functional residual capacity [6] and proliferative epithelial changes and interstitial fibrosis...
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Báo cáo y học: "Central venous oxygen saturation and emergency intubation another piece in the puzzle" potx
... systemic oxygen delivery increased before intubation because of pre-oxygenation with 100% oxygen, which results in a large amount of physically dissolved oxygen [7] Secondly, sedation and paralysis ... and paralysis required for intubation most likely lower systemic oxygen demand and thus increase SCVo2 via a net decrease in oxygen extraction ratio These two mechanisms should outweigh the potential ... that some patients had an underlying oxygen supply/demand dependency, so that any increase in oxygen delivery was accompanied by an increase in consumption, and consequently unchanged SCVo2 Unfortunately,...
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Báo cáo y học: " FEM-based oxygen consumption and cell viability models for avascular pancreatic islets" pot
... diffusion of oxygen and nutrients from the periphery, which limits the oxygen and nutrient supply in the inner core of islets, especially larger islets, and can ultimately lead to hypoxia and cell ... oxygenconditions to lower three islets(h = diameters of =presented and 200 μm) in standard culture conditions Calculated oxygen concentration for three islets (with diameters of = 100, 150, and ... large size, large metabolic demand, and increased sensitivity to hypoxia Hence, there is a keen interest to model oxygen consumption in non-vascularised islets and to use the acquired information...
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Báo cáo y học: " Near-infrared spectroscopy during stagnant ischemia estimates central venous oxygen saturation and mixed venous oxygen saturation discrepancy in patients with severe left heart failure and additional sepsis/septic shock" potx
... failure and death [1] Low cardiac output states (cardiogenic, hypovolemic and obstructive types of shock), anemic and hypoxic hypoxemia are characterized by a decreased DO but a preserved oxygen ... from the pulmonary artery is used for calculations of oxygen consumption and has been advocated as an indirect index of tissue oxygenation and a prognostic predictor in critically ill patients ... risks and its usefulness remains under debate [7,8] Not surprisingly the monitoring of central venous oxygen saturation (ScvO2) was suggested as a simpler and cheaper assessment of global DO2 to oxygen...
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Báo cáo y học: "entral venous oxygen saturation and blood lactate levels during cardiopulmonary bypass are associated with outcome after pediatric cardiac surgery" potx
... statistical analysis, and manuscript preparation CC participated in data acquisition and interpretation GI provided data acquisition and interpretation and manuscript drafting TDT and SE were involved ... values of venous oxygen saturation during CPB are generally interpreted as an increased peripheral oxygenextraction rate due to an oxygen delivery (DO2) inadequate to sustain the oxygen consumption ... Kolmogorov-Smirnov test, and in case of nonnormal distribution were presented as median and interquartile range and analyzed with nonparametric tests Categoric data are presented as number and percentage...
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Advanced silicon and germanium transistors for future p channel MOSFET applications
... Spectroscopic ellipsometry SEM Scanning electron microscopy Si Silicon SiC Silicon carbon SiGe Silicon germanium SiN Silicon nitride SRIM Stopping and range of ions in matter SS Subthreshold swing TEM ... performance enhancement have been well studied, including silicon germanium (SiGe) or silicon carbon (SiC) source and drain (S/D) stressor and silicon nitride (SiN) liner stressor technologies SiGe ... thicknesses and control p-FET P-FETs with DLC liner of ~33 nm and ~26 nm have 39 % and 16 % higher ION, respectively, than the control 34 |IDS| versus VDS plots for unstrained p-FET and strained...
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Validation of chemical looping with oxygen uncoupling (CLOU) using cu based oxygen carrier and comparative study of cu, mn and co based oxygen carriers using ASPEN plus
... devolatilization and gasification syngas and char burn with O2 carrier reduction reaction carrier oxidation reaction O2 and Cu2O separation CuO and air separation separation - ash and flue gas flue ... reactors, oxygen carrier conversion kinetics, and the overall performance of the CLOU process Scaled-up cases were also carried out to investigate the influence of increase in the coal and oxygen ... the overall energy output, and the effect of varying the air flow rate on energy output and the performance of three – Copper (Cu), Manganese (Mn) and Cobalt (Co) based oxygen carriers in the CLOU...
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Interface studies of rare earth oxides on silicon and germanium substrates
... LAO(12.5nm)/Si and LAO(12nm)/Y/Si structures before and after 800oC annealing The corresponding EOTs before and after annealing are 5.70 nm and 6.10 nm respectively for LAO/Si, and 4.80 nm and 5.50 ... followed by (b) molecular oxygen oxidation (3 nm Y + O2) and (c) oxygen plasma oxidation (3 nm Y + OP); (d) evaporation of nm Y followed by oxygen plasma (1 nm Y + OP) and (e) evaporation of 0.5 ... formed by in situ oxidation using oxygen plasma (OP) 176 xix Introduction and Motivation 1.1 Introduction and Motivation MOS scaling: problems and solutions Silicon (Si) - based microelectronic...
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