... Matrix 23 Step Determine the Number of Dimensionless Groups 24 Step Construct the Dimensionless Groups 24 Step State the Dimensionless Relationship 26 39 2.1 Scalars, Vectors, Tensors, Notation ... and is therefore discontinuous or discrete at the most microscopic scales In principle, it is possible to study the mechanics of a fluid by studying the motion of the molecules themselves, as is ... mathematicians, scientists, and engineers are interconnected: Engineers need to understand natural phenomena to be successful, scientists strive to provide this understanding, and mathematicians pursue the...
Ngày tải lên: 02/04/2014, 14:50
fluid mechanics, fourth edition
... stresses However, whereas a solid can support both tensile and compressive normal stresses, a fluid usuallysupportsonlycompression(pressure)stresses.(Someliquidscansupportasmall amount of tensile stress, ... discusses Irrotational Flow; this material is rather classical but is still useful for two reasons First, some of the results are used in later chapters, especially the one on Aerodynamics Second, ... especially interested in the discussions of propulsive mechanisms of fish, birds, and sailboats and the material on the historic controversy between Prandtl and Lanchester Chapter 16 on Compressible...
Ngày tải lên: 02/04/2014, 14:53
... wafers, stainless steel plates, and Cu plates were used as substrates The substrates were mounted on the top of the graphite rod; no metals were added as potential catalysts Prior to the growth, the ... useful for various applications such as sensing and catalysis This is in contrast to stacked CNWs that require additional dispersion, such as through ultrasonication, to obtain individual CNWs ... an Si wafer with a top layer of thermally-formed SiO2 (thickness of 200 nm) Sensor current was measured using a Keithley 2602 source meter Results and discussion Figure shows a schematic of the...
Ngày tải lên: 21/06/2014, 05:20
ASTM D86 Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure
... measuring device assembly in general use, consisting of the sensor and its casing, or an electronic system and its associated software, or both, is so designed that the temperature measuring system ... DETAILED DESCRIPTION OF APPARATUS A2.1 Distillation Flasks—Flasks shall be of heat resistant glass, constructed to the dimensions and tolerances shown in Fig A2.1 and Fig A2.2 Flasks made of borosilicate ... observe and record data necessary for the calculation and reporting of the results of the test as required by the specification involved, or as previously established for the sample under test These...
Ngày tải lên: 20/10/2014, 17:17
Tài liệu Bioregulatory Properties of Medications Aiming at Multiple Targets Open New Therapeutic Perspectives doc
... implications for the treatment of stress and stress-related disorders STRESS AND STRESS-RELATED DISORDERS From a scientific viewpoint, stress is generally described as a state of bodily or mental tension ... anxiety and depressive disorders.14 Stressful events often precede the onset of depression, and stress also has been associated with the severity of the illness.15 In addition, recent depressive and ... was weeks The assessment of efficacy was based on the ratings (from [asymptomatic] to [severe]) of a summary score and on subscores at the end of the study (eg, nervousness or restlessness, excitability...
Ngày tải lên: 21/02/2014, 17:20
Inverse modeling for retrieval of optical properties of sea water and atmospheric aerosols from remote sensing reflectance
... situ measurements in the area of study in Singapore waters In this case, islands with coral reefs were chosen and measurements were made around these areas The parameters measured include absorption, ... reaches the water body and backscattered out of water and scattered along the way to the sensor The scattering along the path as it reaches the sensor is termed as diffuse transmittance, Ts↑ (λ) The ... regressions The first regression was done between the cloud and shadow corrected reflectance and the TAFKAA corrected reflectance The second is for the linear line fitted in the scatterplots shown...
Ngày tải lên: 11/09/2015, 16:05
Atomistic simulations of the mechanical properties of nanocrystalline copper at room temperature
... the order of several grain sizes, which corresponds to the dimensions of the dimple structures observed on the experimental fracture surfaces, emerges Due to the short simulation time scale and ... related to the spatial orientation and distances between separate atoms This model is often ascribed to as the soft sphere model, where the softness analogizes the electron clouds of atoms Secondly, ... no mass changes in the system In other words, the number of atoms in the system remains the same The Lagrangian formulation, addressed in the following, is typically applied to those MD simulations...
Ngày tải lên: 30/09/2015, 14:23
hydrothermal properties of materials experimental data on aqueous phase equilibria and solution properties at elevated temperatures and pressures
... (n-butane) ?? Vis.obs Sampl Vis.obs Vis.obs Vis.obs Sampl Vis.obs Sampl Vis.obs Vis.obs Vis.obs Sampl Vis.obs Vis.obs Vis.obs Vis.obs.; p-T curves Vis.obs Sampl Sampl Methods Phase equil Continued ... Non-aqueous components Quench Wt-loss Quench Wt-loss Wt-loss Wt-loss Wt-loss Wt-loss Wt-loss Quench Quench Wt-loss Wt-loss Wt-loss Wt-loss Quench Wt-loss Wt-loss Wt-loss Sampl Quench Wt-loss Methods ... Table Phase Equilibria in Binary and Ternary Hydrothermal Systems Wt-loss Wt-loss Quench Sampl Wt-loss Quench Quench Wt-loss Wt-loss Wt-loss Sampl Soly Soly Soly Soly Soly Soly Soly Soly Soly Soly...
Ngày tải lên: 01/04/2014, 11:22
Physicochemical properties of polluted water of river Ganga at Varanasi
... (June) at Raj Ghat Usually higher BOD values in summer and lower in the rainy season were recorded No significant variation was observed between other sites ISSN 2076-2895 (Print), ISSN 2076-2909 (Online) ... the sites with the help of mercury thermometer the DO water samples were fixed with the help of magnous sulphate and alkali-iodide-azide solution (2ml each) at the sites and analyzed in the laboratory ... values remain lower than those of system where the rate of photosynthesis is high A high pollution load may also decrease the DO values to considerable level The DO values range from a minimum of...
Ngày tải lên: 05/09/2013, 16:11
Báo cáo khoa học: Increased susceptibility of b-glucosidase from the hyperthermophile Pyrococcus furiosus to thermal inactivation at higher pressures pptx
... its desired value, once the preset pressure was reached At this point, the valves of the individual vessels were also closed, and the central circuit was decompressed The total time of pressurization ... of the FTIR spectra of b-glucosidase FTIR spectroscopy was used to follow the thermally induced changes in the secondary structure of b-glucosidase from P furiosus As previous reports suggested ... dimers [3] In the case of P furiosus b-glucosidase, the subunit interfaces involve fewer electrostatic interactions such as salt bridges and ion pairs than in the case of the enzymes from the...
Ngày tải lên: 07/03/2014, 03:20
Báo cáo khoa học: Studies on the regulatory properties of the pterin cofactor and dopamine bound at the active site of human phenylalanine hydroxylase pptx
... ligands combined, no signicant effect of the ligands on the rate of proteolysis was observed as compared to the ligand-free enzyme (Fig 1B) In this case, the results from SDS/PAGE analyses were ... detector Surface plasmon resonance analyses The interactions between tetrameric wt-hPAH and its substrates (L-Phe and H4biopterin/H2biopterin) were studied by surface plasmon resonance (SPR) analysis ... cofactor and dopamine function as negative effectors and how substrate binding completely reverses these effects The coordinates for the structure of the binary and ternary complexes of the catalytic...
Ngày tải lên: 17/03/2014, 09:20
gas sensing properties of wo3 doped rutile tio2 thick film at high operating temperature
... TiO2 sensors exhibited a gas sensing property similar to that of a p-type, semiconductor gas sensor The sensitivity to gases is defined as (Ra À Rg)/Rg, where Ra and Rg are the steady state resistances ... very small And in Fig 7, the resistance of the sensor decreased very fast in the NO2 condition but exhibited very small changes in the gas mixtures (NO2 + other oxidizing gases) These sensing results ... 600 °C The ratio of the WO3 doping into TiO2 was varied among (undoped), 11 and 15 wt.% Results and discussion Fig shows SEM images of the sensing films deposited by screen printing The sensing...
Ngày tải lên: 19/03/2014, 16:48
Báo cáo khoa học: Charging of tRNA with non-natural amino acids at high pressure potx
... plate was cut into pieces as shown in the left-hand panel and the radioactivity was counted in scintillator solvent using Beckmann Apparatus LS 5000 TA The position of the substrates was visualized ... Position of CoA[OH], in circles, was visualized under UV light The arrows show the position of the products For that purpose, we used a high-pressure technique High pressure is currently used ... MgCl2 and mm EDTA The hydrolysed tRNA was separated by HPLC ⁄ ESI ⁄ MS on Waters ⁄ Micromass ZQ mass spectrometer (Manchester, UK) A sample was injected using an autosampler onto a Waters Nova...
Ngày tải lên: 30/03/2014, 10:20
atmospheric pressure fabrication of sno2 nanowires for
... represents the response of a reference humidity sensor; the other line represents the response of the SnO2-nanowire sensor As expected from theory the resistance of the SnO2-nanowire decreases in ... SnO2-films are fabricated by a spray pyrolysis process These SnO2 films have already been employed by us as gas sensing elements Recently we have reported on SnO2 thin-films gas sensors (thickness 50 ... M presence of water The sensor reacts very sensitively to the first increase of humidity and tends to saturate at high values The single steps, however, can still be resolved As soon as the humidity...
Ngày tải lên: 05/05/2014, 15:26
Analyses of chemical composition on bacteria surface treated in atmospheric pressure plasmas
... Optical emission spectrum Figure shows optical emission spectrum from plasma discharge The signals from OH, N2, and O were obserbed as well as that from Ar Several species coming from atmospheric ... Discussions 3.1 SEM photograph of bacteria Figure shows bacteria exposed plasmas The bacterium of left side in Fig has an ellipsoidal shape and looks like to be partly ruptured One of right side ... be candidate for reactants on the cell wall OH Fig.5 Optical emission spectrum in the plasma (Ar: slm, Power: 50 W) Summary We analysed the sterilization mechanism with SEM photograph, XPS spectra...
Ngày tải lên: 18/05/2014, 20:29
Báo cáo hóa học: " Structural and physical properties of antibacterial Ag-doped nano-hydroxyapatite synthesized at 100°C" pptx
... wide use in consumer products such as cosmetics, lotions, creams, toothpastes, laundry detergents, soaps, surface cleaners, room sprays, toys, antimicrobial paints, home appliances (e.g., washing ... Acknowledgements The authors would like to thank Dr N Popa for his constructive discussions for the XRD analysis The authors also wish to thank Alina Mihaela Prodan for assistance with antibacterial assays ... information about the size and typical shape of the as-prepared samples The results suggest that the doping Ag+ has little influence on the morphology of the HAp The samples prepared at the atomic ratio...
Ngày tải lên: 20/06/2014, 23:20
Báo cáo hóa học: " Catalytic properties of Co3O4 nanoparticles for rechargeable Li/air battery" doc
... nanoparticles are synthesized and characterized as a catalyst for the air electrode of a Li/air battery The shape and size of the nanoparticles are observed using scanning electron microscopy and transmission ... Competing interests The authors declare that they have no competing interests Authors' contributions KS did the synthetic and characteristic works in this journal YJ gave the advice and guided the experiment ... properties Introduction A significant increase in the energy density of rechargeable batteries is required to satisfy the demands of vehicular applications and energy storage systems One approach to solving...
Ngày tải lên: 20/06/2014, 23:20
báo cáo hóa học:" Catalytic properties of Co3O4 nanoparticles for rechargeable Li/air batteries" potx
... practical use After 10 cycles, the electrode was discharged to 2.3 V, and the surface was observed by SEM to investigate the morphology change during cycling In the SEM images of the air electrodes before ... Zheng Y, Ma Y, Xu T, Gao G, Liang S, Teng Y, Zhu Y: Facile synthesis of hollow Co3O4 microspheres and its use as a rapid responsive CL sensor of combustible gases Talanta 2008, 76:1058-1064 Yang ... galvanostatic cycling using a WonATech (WBCS 3000, Seocho-gu, Seoul, Korea) charge-discharge system Experiments were carried out in atm of O2 using an air chamber Results and discussion Scanning...
Ngày tải lên: 21/06/2014, 17:20
Báo cáo y học: "Immunomodulatory properties of mesenchymal stem cells: a review based on an interdisciplinary meeting held at the Kennedy Institute" potx
... HLA class I molecules on the MSCs Several speakers addressed the issue of the role of soluble factors in the immunomodulatory properties of MSCs Human MSCs caused T-helper-1 cells to decrease IFN-γ ... engraft in secondary lymphoid organs, where they induce reversible T-cell unresponsiveness and possibly also impair B-cell responses [58] At a later stage after infusion, the MSCs reach the subarachnoid ... MSCs from patients with systemic sclerosis (SSc) and healthy control individuals No significant differences were observed with respect to the formation of fibroblast colony forming units and the...
Ngày tải lên: 09/08/2014, 08:23
Electronic and magnetic properties of two dimensional electron gases at complex oxide interfaces for different polar systems and crystallographic orientations
... experiences in his carrier and tips that he shared with us during the discussion sessions are great valuable and cannot be learned from any textbooks I used to attend his discussion sessions whenever there ... explore the interface physics 1.3 Scope and outline of the thesis The main aim of this thesis work is to investigate and explore the LaAlO3/SrTiO3 (defined as LAO/STO in later part of discussions) and ... discussed in chapter Chapter to chapter discusses the experimental results of this thesis work The summary of the thesis work and scope of future work are discussed in chapter Chapter In this...
Ngày tải lên: 10/09/2015, 09:11