oxidation stability and bearing corrosion protection

... industrial and automotive gear lubricants These materials provide excellent protection against gear tooth scuffing and have the advantages of better oxidation stability, lower corrosivity, and often ... Petroleum Products and Lubricants) the British Institute of Petroleum handbook (Standard Methods for Testing Petroleum and Its Products), the U.S Federal Test Method Standard No 791, and similar publications ... the loose sand and shale; a plan afterward adopted in oil well and artesian well drilling Drilling then began under the direction of W A Smith, a blacksmith and brine well driller, and went down...

Ngày tải lên: 06/07/2014, 15:45

... B and C colonies were 94.5%, 3.0% and 2.5% respectively for 24h exposure to 4oC (n=200); and 97.5%, 1.0% and 1.5% respectively for 24h exposure to 25oC (n=200) The proportion of Grade A, B and ... Germany) with an HBO-103 mercury lamp and filter sets for FITC, Cy3.5, Texas Red, Cy5, Aqua, and DAPI Images were captured, processed, and analyzed using ISIS mBAND/mFISH imaging software (MetaSystems ... maintain proper pH, humidity and CO2 balance For the 4oC and 25oC exposure groups, the 6-well culture plates were sealed at the sides with parafilm (for minimal evaporation), and placed in either a...

Ngày tải lên: 31/10/2012, 16:57

... concentration and other biological parameters with an iterative model, and exploration of model characteristics such as modularity, optimality and robustness, promise to advance our system-wide understanding ... between and days, whereas the gain in tolerance was only minor during the first 24 h of cold exposure and between days and In contrast, LT50 decreased almost continuously in C24 until day and did ... metabolism between day and days of cold exposure revealed significant differences in net carbon uptake and sink export rate between Rsch and C24 Whereas net carbon uptake and rate of sink export...

Ngày tải lên: 14/02/2014, 22:20

... 480, and 300 bp, and weakly hybridizing bands of approximately 750 and 200, consistent with the lengths and restriction maps of the two c-tubulin nanochromosomes (Fig 1B) The restriction maps and ... adjacent to the T3 loop and within the T5 loop may influence the binding affinity and hydrolysis of GTP and ⁄ or the egress of GDP and Pi, which may in turn control the assembly and stability of new basal ... contacts at the ‘plus’ and ‘minus’ ends are indicated by ‘+’ and ‘)’, respectively, whereas those involved in the lateral contacts of the H3 and M-loop are shown by ‘H’ and ‘M’ Regions thought...

Ngày tải lên: 07/03/2014, 04:20

Ngày tải lên: 17/03/2014, 13:47

... in the presence of NO2 and CO both at ambient temperature and 150 ◦ C Three concentrations of each gas under study were measured: 100, 200 and 500 ppb for NO2 ; and 1, 10 and 50 ppm for CO The ... C1 and C2 correspond to 500 and 100 ppb (case of NO2 ) or 50 and ppm (case of CO) Table shows the sensitivities of the different sensors studied when operated at room temperature (25 ◦ C) and ... deposition (CVD), had purity higher than 95%, were up to 50 ␮m in length and their outer and inner diameters ranged from 15 to nm and to nm, respectively A uniform functionalization with oxygen was...

Ngày tải lên: 19/03/2014, 16:48

... Catalysis Communications 10 (2009) 378–382 379 condition for 12 and 24 h The obtained powder was then washed by distilled water and ethanol 010 2.3 Characterization Intensity / a.u 004 200 X-ray ... hydrolysis of TTIP with 0.1 M KCl solution (AS), and samples hydrothermally treated in ammonia for 24 h at (b) 60 °C, (c) 80 °C, (d) 100 °C, (e) 120 °C and (f) sample hydrothermally treated in ammonia ... Teflon-line stainless autoclave at 60, 80, 100, and 120 °C with stirring Generally, transition metal alkoxides are very reactive with moisture, heat, and light due to the presence of highly reactive...

Ngày tải lên: 20/03/2014, 13:04

... an increase in gas concentration The response and recovery times to 50, 100, 200 and 500 ppm H2 S are 68 and 35 s, 42 and 26 s, 31 and 25 s, 25 and 21 s, respectively These times are short enough ... ethanol and acetone, and negligible responses to n-hexane, NH3 , H2 and CO even at such a high concentration (1000 ppm) On the other hand, the optimum operating temperature to ethanol and acetone ... 120–160 ◦ C and to detect ethanol and acetone at 200 ◦ C The doped sensor also presented long-term stability and relatively short response/recovery times The Ag/␣-Fe2 O3 sensor is a promising candidate...

Ngày tải lên: 20/03/2014, 13:04

... 4f5/2 and W 4f7/2 are found to lie at 37.1 and 35.20 eV, respectively and are contributed to lattice tungsten in the WO3 crystal 3.2 Gas sensing properties of the thin film sensors Results and discussion ... , CO, and water vapor were measured A given amount of each gas was injected into the chamber and mixed by a fan for 30 s The sensitivity to gases, S, is defined as S = V g /V a , where Vg and Va ... The relationship between the gas sensitivity and TMA concentration at 70◦ C NH3 , gasoline, C2 H5 OH, CH4 and CO at the same concentration of 1000 ppm and to water vapor These experimental results...

Ngày tải lên: 20/03/2014, 13:12

... helicases by structural and functional analyses, including ATP binding and hydrolysis (motifs I and II), ssDNA binding (motifs Ia, III, IV, and V), and coupling of ATPase and helicase (DNAunwinding) ... and C-terminal fragments was amplified separately for each protein using M13R and reverse-strand mutagenic primers (K229QR, T259AR, D323NR, E324QR, Q354ER, H386DR, R419AR, E633QR and R660AR) and ... measured by EMSA, using single-stranded (25-mer) and doublestranded DNA (blunt-end, 5¢ overhang, 3¢ overhang and forked-end) substrates Binding assays were carried out at and 25 °C in 20 lL reaction...

Ngày tải lên: 30/03/2014, 04:20

... fiber, and film morphologies, which were denoted as Mon-C-g, Fiber-C-g, and Film-C-g, respectively The BET surface areas of Mon-C-g, Fiber-C-g, and Film-C-g are 377.9, 593.0, and 569.1 m2 gÀ1 and ... for methanol oxidation of 85 mA mgÀ1 Pt after 600 s at 492 mV vs NHE and 60 8C in H2SO4 0.1 M/CH3OH 0.5 M The catalytic activity tests and XRD and SEM analyses demonstrated the stability of the ... ratio, and a resorcinol to gelation catalyst molar ratio of 5.7 and 500, respectively), which exhibits 1.35 cm3 gÀ1 and 285 m2 gÀ1 meso-macropore specific volume and surface area, respectively, and...

Ngày tải lên: 23/04/2014, 22:32

... the side and top-view SEM images of sample A; (D)—(F) are the side and top-view SEM images of sample B; and (G)—(I) are the side and top-view SEM images of sample C The inset (i), (ii) and (iii) ... into three bands located at 1.95 eV, 2.20 eV and 2.39 eV (corresponding to the orange, low- and high-energy green luminescence, respectively) It is believed that oxygen vacancies (VO) and zinc vacancies ... spectra of samples A and B which share the same growth condition except for different ammonia contents The PL spectra consisted of a weak near band-energy UV emission at around 3.2 eV and a broad visible...

Ngày tải lên: 06/05/2014, 13:24

... at 140 °C either 20 s (Figs 3a and 3b) or 10 (Figure 4a and b) show that Bacillus stearothermophilus still retained its typical rod shaped form (Figure 3a and 4a) and Staphylococcus aureus 62 Natura ... fluorescence in a, b and c) and propidium iodide (red fluorescence in d, e and f) (a, d) un-treated bacteria, (b, e) bacteria treated with high-temperature dry heat for 10 minutes at 140 C and (c, f) bacteria ... stearothermophilus and 37 o C for Staphylococcus aureus Cells were harvested and resuspended in sterile water 100 µl suspension containing 10 cells of Bacillus stearothermophilus and Staphylococcus...

Ngày tải lên: 18/05/2014, 20:29

Ngày tải lên: 18/05/2014, 20:33

... immunohistochemistry, XD and JK performed the western blotting SK, XD and WS conceived and designed the experiments and analyzed the data The manuscript was written by SK and WS All authors read and approved ... I, II and III vs control group #P < 0.05, group I vs groups II and III, by one-way ANOVA and Newman-Keuls test) sufficiently separated from each other to be counted individually (Fig 4A and 4B) ... collagen and is postulated to play an important role in HCC invasion and metastasis [21,22] Tumor angiogenesis is another crucial step in the growth and metastasis of cancer, including HCC, and has...

Ngày tải lên: 18/06/2014, 16:20

... Mechanical and Electrical Engineering, National Taipei University of Technology, Taipei 106, Taiwan Authors’ contributions W-HL and D-HW conceived and designed the experiments, analyzed the results, and ... The Netherlands), and AFM (NS3a, Digital Instruments, Santa Barbara, CA, USA) for obtaining comprehensive information on the surface morphology, roughness, atomic bonding nature, and detailed ... cluster size and surface roughness However, the exact size of the nanocrystallites cannot be clearly identified by SEM due to the limited resolution, and the details were further explored and discussed...

Ngày tải lên: 20/06/2014, 20:20

... Authors’ contributions CMP fabricated and measured the samples and wrote the manuscript WRC and MYS assisted in experimental design, measurement, data analysis and preparing the manuscript Competing ... with a 10-nm Ti capping layer to prevent oxidation [21] The sample was then annealed to 350°C in N2 for 30 to yield the NiSi phase [15] The unreacted nickel and titanium were removed with a sulphuric ... performed using standard low-frequency lock-in techniques with a nA constant current Results Figure compares the field-dependent two-terminal resistivities of the aluminium- and the nickel silicide-contacted...

Ngày tải lên: 20/06/2014, 22:20

... impregnation influenced the dispersion, oxidation state, and oxygen mobility of the impregnated Mn XRD and TPR analyses showed that Al-SBA-16-MA15% had better Mn dispersion and a higher degree of reduction ... JKJ, SSK, SHP, and SCK participated in some of the studies and in drafting the manuscript YKP conceived the study and participated in all experiments of this study Also, YKP prepared and approved ... may lead to higher lattice oxygen mobility and higher oxidation activity It has been reported that the order of catalytic activity of Mn oxides for the oxidation of VOCs is Mn3O4 > Mn2O3 > MnO2...

Ngày tải lên: 20/06/2014, 23:20

... temperature for h and heat-treated at 60°C for h in a convection oven to produce CuO nanostructures The black powders were centrifuged and washed with deionized water and ethanol several times and were ... CuO and CuO/MWCNT Cyclic voltammetry of pure CuO and CuO/MWCNT composite nanostructures in the first ten cycles Authors’ contributions S-DS carried out the CuO and CuO/MWCNT sample preparation and ... and H-WS participated in microstructural and electrochemical analyses D-WK designed the study, lead the discussion of the results and participated in writing the manuscript All authors read and...

Ngày tải lên: 21/06/2014, 03:20

... Substrate and targets were subjected to in situ argon plasma treatment to clean the surfaces and remove any impurities The layers were grown at 250°C, and the argon pressures were × 10-2 and × 10-3 ... statistical analysis, and revised the manuscript RJK and UB carried out the HRTEM experiments, and revised the manuscript MJMG participated in the coordination of study All authors read and approved the ... target and the composite target, respectively The thickness of both types of layers was controlled by the deposition time The deposition rates were found to be 7.4 and 7.8 nm/min, for SiO2 and SiGe...

Ngày tải lên: 21/06/2014, 04:20