metals metalloids and non metals by laser ablation inductively coupled plasma mass spectrometry la icp ms in biological tissues
TECHNIQUES FOR THE ANALYSIS OF ORGANIC CHEMECALS BY INDUCTIVELY COUPLED PLASMA MASS SPECTROMETRY (ICP-MS) pptx
... diluted in a suitable solvent Direct organic solvent analysis demands some specific features and capabilities of the ICP- MS instrument, particularly in the sample introduction and plasma systems Details ... ShieldTorch System and a mass flow controller capable of adding oxygen to the plasma In routine operation, automatic switching between one set of cool plasma conditions and one set of normal plasma conditions ... ionized in a different region of the plasma This method is most effective if the plasma potential is minimized, which can only be achieved effectively by grounding the plasma using a metal shield plate...
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Si nanowires synthesized by laser ablation of mixed sic and sio2 powders
... nanowires The inset is SAED pattern Žb HRTEM image of the b-SiC nanoparticles The fringes are Ä1114 lattice planes with a spacing of 0.25 nm found in the SiNWs products by using other starting materials ... (1999) 16–20 spacing of 0.25 nm This value fits with the standard Ä 1114 crystalline plane of b-SiC Grain boundaries and microtwins are the main defects observed The results of XRD and Raman analysis ... the laser ablation process was started A KrF excimer laser beam Ž248 nm of 400 mJ per pulse and a pulse width of 34 ns at 10 Hz ablated the target The total duration of ablation was h and the size...
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Temperature dependence of morphology and diameter of silicon nanowires synthesized by laser ablation
... morphology of SiNWs synthesized by laser ablation In this Letter, we present the results on this project Our results show that the morphology and diameter of SiNWs synthesized by laser ablation not ... diameters of nanowires in zone C are larger than those in zone A or zone B Conclusions In summary, the diameter and morphology of SiNWs synthesized by laser ablation not only correlate closely with ... Letters 358 (2002) 396–400 Laser ablation synthesis of nanowires is quite popular, by which long, uniform-sized, and singlecrystal SiNWs can be readily fabricated in bulk quantities [16] To our...
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Báo cáo " Silver nanoparticles prepared by laser ablation and their optical characteristics " pptx
... silver nanoparticles prepared by laser ablation (a) and by chemical reduction (b) Fig Absorption spectra of silver nanoparticles produced by laser ablation in a 0.003, 0.01 and 0.1M solution of PVA ... produced by laser ablation in 0.01M solution of PVA Fig Comparison of the UV-Vis absorption spectra of silver nanoparticles produced by laser ablation in a 0.003M solution of SCD (a) and in a 0.01M ... SCD In comparison to the results obtained by chemical reduction using silver nitrate and trisodium citrate dihydrat C6H7Na3O7 (SCD), the silver nanoparticles average size produced by laser ablation...
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Identification of healthy elderly fallers and non-fallers by gait analysis under dual-task conditions docx
... the walking pattern or stopping walking Deficient structure and functioning of peripheral systems (vestibular and ocular system, proprioception) are certainly important factors since balance is ... talking while walking on velocity and balance following a stroke Age Ageing 2001; 30: 319 Á/23 Bronstein AM, Hood JD, Gresty MA, Panagi C Visual control of balance in cerebellar and parkinsonian ... examined in the healthy elderly fallers and nonfallers (autonomous subject) The Timed Up and Go Test9 and the single-task test described by Tinetti2 have been found useful for predicting falls in...
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Báo cáo sinh học: " Roles of adjuvant and route of vaccination in antibody response and protection engendered by a synthetic matrix protein 2-based influenza A virus vaccine in the mouse" pdf
... contrasting finding by Tompkins et al [9] that T cells contributed to protection against lethal IAV challenge in mice immunized by M2-DNA and M2recombinant adenovirus may be explained by induction ... resistance against IAV infection, independent of the glycoprotein makeup of circulating IAV strains The ectodomain of matrix protein (M2e) is a promising candidate for a broadly protective IAV vaccine ... anesthetized by intraperitoneal (i.p.) injection of 0.2 ml ketamine-xylazine (70/7 mg/kg); this results in the aspiration of the vaccine into upper and lower airways For subcutaneous (s.c.), intramuscular...
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báo cáo hóa học: " Method optimization and validation for the simultaneous determination of arachidonic acid metabolites in exhaled breath condensate by liquid chromatography-electrospray ionization tandem mass spectrometry" doc
... and include prostaglandins (PG), isoprostanes and leukotrienes (LT) These eicosanoids were used to try to assess the lung inflammation in patients with pulmonary disease Some prostaglandins and ... detection, including structural information, tandem mass spectrometry was used to determine unequivocally prostaglandins and leukotrienes This developed method could serve to monitor inflammatory ... Precision and accuracy The intraday repeatability was addressed by analysing Q1 and Q2 ten times in a row and on six different days resulting in a relative standard deviation for all parameters in the...
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Báo cáo y học: "Quasi-MSn identification of flavanone 7-glycoside isomers in Da Chengqi Tang by high performance liquid chromatography-tandem mass spectrometry." ppsx
... fragmentation of naringin and isonaringin based on quasi-MSn (up to MS4 ) spectra in negative ion mode Proposed fragmentation of naringin and isonaringin based on quasi-MSn (up to MS4 ) spectra in negative ... neohesperetin were 8.0, 9.3 and 10.3 minutes respectively (Figures and 3) Identification of the two pairs of flavanone 7-glycoside isomers by LC -MS/ MS We found that hesperidin, neohesperidin and naringin ... hesperetin and neohesperetin were 5.5, 8.0, 9.3 and 10.3 minutes respectively which underwent CID = 30 v to obtain quasi -MS/ MS /MS spectra We found an unusual phenomenon in the quasiMS /MS/ MS spectra...
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Metals, Metalloids and Radionuclides in the Baltic Sea Ecosystem docx
... Bothnia, Finland and Riga Several regions are distinguished based on the bottom topography: the Arkona Basin, the Bornholm Basin and the Gotland Basin (Fig 1.2) The Gotland Basin in subdivided into ... industry is predominantly located in Finland, i.e refinery, fertiliser and chlorine plants and in S w e d e n - chlorine and PCV plants It is important to note that chlorine plants are based on ... 18% to Finland and 2% to Norway (HELCOM, 1998a) Finland has copper smelters, Sweden- aluminium plant; a still mill and several stainless steel plants are located in the area The chemical industry...
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measurement of metalcarbon nanotube contact resistance by adjusting contact length using laser ablation
... the laser beam The laser machining system is equipped with an in- line vision system which allows laser cutting at the desired location on the CNT The laser pulses are focused onto the sample using ... the laser operating parameters The edge of the gap separating the two thin film electrodes is just barely visible in the bottom left-hand edge of the micrograph The figures in the inset show enlarged ... conditions were achieved, the laser spot was positioned over the MWCNT, and a number of successive laser cuts were made In some cases, although the Au film was well ablated by the laser pulse, the MWCNT...
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phase explosion and its time lag in nanosecond laser ablation
... through the laser- induced vapor plume, scattering of laser beam from the laser- induced vapor plume, transient location and velocity of the laser- induced vapor front, and ablation depth per laser pulse ... When the laser fluence is higher than 5.2 J/cm2, the percentage of laser energy scattered by the plume is increased to about 4–5% Fig 2b shows the ablation depth per laser pulse at different laser ... fluences The ablation depth increases from 14 to 20 nm when the laser fluence is less than 4.0 J/cm2 When the laser fluence increases from 4.2 to 5.2 J/cm2, a jump increase in the ablation depth...
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Báo cáo hóa học: " Properties of nanocones formed on a surface of semiconductors by laser radiation: quantum confinement effect of electrons, phonons, and excitons" pptx
... as shown in Figure 4 Non- monotonous dependence of Si crystal microhardness as a function of the laser intensity The increase of microhardness with increasing LR intensity is explained by formation ... Blums J: Buried layer formation in silicon by laser radiation J Appl Phys 1996, 79:9118-9122 Medvid’ A: Redistribution of point defects in the crystalline lattice of a semiconductor in an inhomogeneous ... semiconductor by selective laser heating of the top layer with following mechanical plastic deformation of the layer as a result of relaxation of the mechanical compressive stress arising between these layers...
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Báo cáo hóa học: " Fabrication of HfO2 patterns by laser interference nanolithography and selective dry etching for III-V CMOS application" pdf
... resolution using He-Cd laser interference lithography and dry etching using a combination of CF and O plasmas The etched GaAs trenches formed by this process were found to be residue-free and atomically ... nanostructuring process (a) Schematic drawing of the starting multilayer structure (b) Patterning of the photoresist by laser interference lithography (c) Pattern transfer to the SiO2 layer by CF4 ICP- RIE ... resist and HfO2 patterns Plan view images of (a) the resist pattern after laser interference nanolithography and (b) the resulting HfO2 nanopattern after CF4/ O2 ICP- RIE and HCl/H2O cleaning linewidth...
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Báo cáo hóa học: " Formation of tungsten oxide nanostructures by laser pyrolysis: stars, fibres and spheres" ppt
... a reducing atmosphere in the laser- precursor interaction that influences the reaction pathway towards the formation of the products To determine how the laser wavelength plays a role in laser ... of Figure A schematic of laser pyrolysis within the reaction chamber during laser- precursor interaction The laser power was varied using a polarization-based attenuator, and the wavelength variation ... how the laser parameters affected the product size or composition, and thus, it is believed that some possible competing reactions taking place during the laser- precursor interaction or during annealing...
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Báo cáo hóa học: " Optimization, Yield Studies and Morphology of WO3 Nano-Wires Synthesized by Laser Pyrolysis in C2H2 and O2 Ambients— Validation of a New Growth Mechanism" pdf
... nano-spheres and thin films at relatively low laser power (50 W in a 2.4-mm focal region) We demonstrate the role of thermal annealing in the conversion of the spheres and slabs into nano-wires ... Briefly, the method involves injecting a stream of very fine droplets of a precursor solution into an infrared laser beam and depositing the resulting aerosol onto a Corning glass substrate A wavelength ... wavelength tuneable continuous wave (cw) CO2 laser was used in the experiments (Edinburgh Instruments, model PL6) By selecting a wavelength of 10.6 lm, the laser was 373 within, but not exactly on,...
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Báo cáo khoa học: "Stomatal and non stomatal limitation of photosynthesis by leaf water deficits in three oak species: a comparison of gas exchange and chlorophyll a fluorescence data" potx
... provided continuously and monitored by a mass flow controller A fan homogenized the air inside the chamber CO molar fraction of the air in the chamber (C was ) a controlled by injecting pure CO into ... to a linear relationship and was an indication of a close coupling between both parameters (fig 3) But in well watered Q ilex and Q pubescens plants, this relationship did not remain linear at ... an increase of the instantaneous water use in Q efficiency during drought progression pubescens and Q ilex, and instanta- water use efficiency was higher in Q ilex both in well watered and in...
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Báo cáo lâm nghiệp: "Experimental weathering of mica by mycorrhizal and non-mycorrhizal beech and pine" ppsx
... weathering (transformation into the clay vermiculite, losses of K, Fe and Mg) occurred only in the rhizosphere and was greater in pine rhizosphere than in beech rhizosphere, which could be explained ... explained by the greater amount of organic acids released into the rhizosphere by pine roots (Leyval, 1988) The inoculation of roots with L laccata increased Mg, Fe, Al and K mobilization from the mineral ... medium in pure culture (Leyval and Berthelin, 1986; Leyval, 1988) The L laccata effect on phlogopite weathering could also be an indirect one, attributed to the increased plant growth and to the increased...
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Báo cáo y học: "Identification of bacteria on the surface of clinically infected and non-infected prosthetic hip joints removed during revision arthroplasties by 16S rRNA gene sequencing and by microbiological culture" doc
... resulting in high rates of morbidity and creating a massive economic burden longing or activating simultaneous or subsequent clinical infections Prosthetic joint infections of total hip arthroplasties ... gentamicin The purpose of this study was to identify bacteria within the biofilms on the surface of clinically infected and non- infected prosthetic hip joints by using both 16S rRNA-based molecular ... useful in identifying single bacterial species isolated by standard culture techniques as well as in defining the mixed bacterial flora found on the surface of the prosthetic hip joints by using...
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báo cáo khoa học: "Laser ablation-based one-step generation and bio-functionalization of gold nanoparticles conjugated with aptamers" potx
... conditions by using different concentrations of miniStrep aptamer in a Tris(hydroxymethyl)-aminomethan (Tris) buffer during laser ablation Per investigated concentration, the laser ablation process ... was determined for the whole AuNP population generated by laser ablation (d Feret = 9.0 nm), and the binding of Cy3 labeled streptavidin was performed with the AuNP subpopulation resulting from ... streptavidin were removed using ultracentrifugation, and the amount of bound streptavidin was determined by measuring the remaining streptavidin concentration in the supernatant Since aptamer loading...
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