preparation of equipment and place of deposit

... level of dye adsorption on TiO2 in the form of nanorods and nanotubes is expected because of the high surface area of these nanostructures It is expected that the photoelectrical performance of ... water and 0.1 M HCl and subsequently filtered and dried at 80°C for day To achieve the desired TNT size and crystallinity, the powders were calcined in air at 500°C for h [16] Preparation of TiO2 ... percentages of TNTs and TiO2 nanoparticles A DSSC with a light-to-electric energy conversion efficiency of 4.57%, a short-circuit current density of 10.41 mA/cm2, an opencircuit voltage of 0.662 V, and

Ngày tải lên: 21/06/2014, 17:20

... and co-workers, described the preparation of several esters ofphenylboronic acid by reaction of the latter, in warm water, with sugars like mannitoland sorbitol, and 1,2-diols like catechol and ... chemistry and medicine This chapter describes the structur- al and physicochemical properties of boronic acids and their many derivatives, as well as their methods of preparation A brief overview of ... intriguing question of possible pi-conjugation between carbon andboron in aryl- and alkenylboronic acids and esters [28] NMR data and other evidencelike UV and photoelectron spectroscopy, and LCAO-MO

Ngày tải lên: 02/07/2014, 12:53

... levels and the ovarian pro-duction of androgens, has been found to reduce the follicular and estradiol response to stimulation and to increase the number of mature oocytes and embryo quality and ... should prompt a higher level of stimulation Total follicle count correlates positively with the number of oocytes retrieved and negatively with day 3 FSH and ampoules of gonadotrophins, with fewer ... predictive value of a 0% pen-etration rate with failed fertilization using a standard insemination number (23) Alternative methods of sperm preparation can improve both the SPA (24,25) and the fertilization

Ngày tải lên: 05/08/2014, 16:20

... Vacuum pump 6 N 2 gas Figure 1: Scheme of NOx adsorption apparatus A quantity of 3 g of sample powder was pelletised at a pressure of 7 tonnes and then placed in a solid sample holder inside ... spectra of Zr/APS materials compared to the APS The UV–vis diffuse reflectance absorption spectrum of Zr/APS materials lies between the spectrum of APS and that of bulk-ZrO2.The blue shift of the ... in the region of 1012.69 cm–1 and 661 cm–1 as the vibrations of the tetrahedral and octahedral sheet The band at 462 cm–1 corresponds to Si-O-Mg in clay sheets, Si(Al)-O A similar band at ~ 661

Ngày tải lên: 07/08/2014, 14:20

... Trang 1PREPARATION OF SELENIUM-DOPED ACTIVATED CARBON AND ITS UTILIZATION FOR IMPROVING THE QUALITY OF USED COCONUT OIL E Kusrini*, A Setyopratiwi and U.M Yahya Faculty of Mathematic and Natural ... contains big molecular formula of the triglycerol One mole of triglycerol can react with three moles of KOH and produce one mole of 1,2,3-propanatriol and three moles of salt (R-COOK) where R = alkyl ... solutions of known concentration of Se (500 mg/l) Standards are obtained from the National Bureau of Standards, IAEA, and commercial sources 2.2 Materials Coconut fruits and 5% (v/v) vinegar were obtained

Ngày tải lên: 07/08/2014, 14:20

... History of development of surface engineering 2.1.1 General laws of development 2.1.2 History of development of metallic structuralmaterials 2.1.3 History of development of the technology of surface ... Perfection and combination of methods of manufacturing of surface layers 2.3.2 Design of surface layers, based on mathematicalmodeling 2.3.3 Micro and nanometric testing 2.3.4 Rational application of ... fundamentals of interaction of electronbeam with treated material 2.4.1 Mechanism of interaction of electron beam withtreated material 2.4.2 Efficiency of electron beam heating 2.4.3 Rate of heating and

Ngày tải lên: 10/08/2014, 12:21

... uncompli-cated equipment, possibility of precise control of the microstructure of the depositedcoating as well as of formation of different coatings, e.g corrosion resistant (metaland non-metal ... - the skill of making fire Several tens of thousands of years B.C manalready used improved stone and bone utensils, like knives, awls, engrav-ers, saws and drills) and several thousand years ago ... distinctionbetween techniques of producing surface layers [9] and techniques of deposition ofcoatings [10, 11] They do not combine the same groups of techniques (e.g laser andelectron beam techniques

Ngày tải lên: 10/08/2014, 12:21

... radius of curvature of electron path; Y - displacement of spot relative to object (From Oczoœ, K [7] With permission.) Fig 2.2 Methods of focusing of the electron beam: a) focusing below surface of ... systems in the form of electron magneticlenses are widely used in practice to focus and control the displacement ofthe beam, on account of its high sensitivity and low degree of dependence on electron ... to the effect tem-of atmosphere tem-of the logical process and is characterized by long life (up to 5500 h), reliability andrepeatability of beam parameters [10] The emitter of electrons is, directly

Ngày tải lên: 10/08/2014, 12:21

... and tribological properties. Two types of alloying are distinguished, i.e., remelting and fusion (Fig 2.32). Remelting The first type of alloying consists of remelting of coating as well as of ... the form of vapors and of deposition of these pors by PVD methods on a substrate (see Chapter 6, Part II). va-Detonation (explosive, impact) hardening consists of very rapid heat-ing of the treated ... (Physics and Chemistry of Material Treatment), No 5, 1974, pp 78-86 22 Ryzkov, F.N., Baskakov, A.V., and Uglov, A.A.: The amplitude of electron beam oscillation and its effect on the shape and size of

Ngày tải lên: 10/08/2014, 12:21

... occurrence of resonance stimulation 3.2.2.1 Inversion of occupation of energy levels Inversion of occupation of energy levels consists of inversion of the ergy structure of the set of quantum ... Thediffusion coefficient of the majority of liquids is of the order of 10-5 cm2/s Amolecule reaches the depth of 10 nm in a time of approximately 10-6 s [6] tem-It follows that the exchange of molecules ... re-sult of defects of the crystalline lattice, during deformation (slip planes)and chipping of solids, causing the exposure of new surfaces, nucleation of new phases, etc The dimensions and properties

Ngày tải lên: 10/08/2014, 12:21

... to the substrate, stability of thermophysicalproperties, homogeneity of properties and of thickness, as well as ease ofdeposition and stripping [24] The thickness of such coatings usually doesnot ... bound-ary of melted material propagates inward, thereby increasing the zone ofmelted material to the moment of breaking off of heating or equalizing theamount of heat delivered with the amount of heat ... effectiveness of laser heating depends on the heat balance of absorbedpower within the thin subsurface layer of cold material and power givenoff to the environment by way of radiation of the heated

Ngày tải lên: 10/08/2014, 12:21

... components of assemblies and instruments working in conditions of severe corrosion hazard Densifying (healing) Densifying consists of remelting of the surface layer or a deposited coating (or coating and ... to the surface of the laser-melted pool A usable effect of densification is an increase of hardness and improvement of surface smoothness, an enhancement of Trang 6Fig 3.41 Effect of laser remelting ... (LSA) consists of simultaneous melting and mixing of the alloying and the alloyed (substrate) material The action and pressure of the laser beam cause both materials to melt; a pool of molten material

Ngày tải lên: 10/08/2014, 12:21

... hardening of pistons and of piston rings: a) outerdiameter surface of piston ring; b) flat side surface of piston ring; c) surface of groovebottom in cast steel and cast iron piston; d) side surface of ... Laser hardening of cylinder wall: a) comparison of wear; b) way of harden-ing causharden-ing more uniforme wear; 1 - curve of wear of laser hardened cylinder wall; 2 - curve of wear of cylinder ... 119-121 187 Komorek, Z., and Bojar, Z.: Effect of chemical composition and parameters of laser treatment of superficial layer on selected properties of protective layers of nickel-base casting

Ngày tải lên: 10/08/2014, 12:21

... 4.3 Depth of implantation: a) schematic portraying the range of ion implanta-tion; b) dependence of ion implantation range R p and standard deviation ∆Rp on energy of implantation of nitrogen ... surface of the host material but at a distance of some Trang 2ele-tenths of a micrometer from it, due to backscatter and the non-elastic acter of interaction of the ions with electrons of the ... depends on the cross-section ofnuclear deceleration, the distribution profile of atom displacement of theimplanted material (radiation defects) is similar to the profile of implanta-tion, with the

Ngày tải lên: 10/08/2014, 12:21

... cracking of ceramics and sintered carbides is hanced by the implantation of Zr, Cr and Ti en-4.6.3 Hardness and adhesion of implanted materials Ion implantation of the majority of metallic, ceramic and ... the implan-tation of Ti and Mo ions Optical properties of glasses and of synthetic materials is modified by the implantation of Nb, Ti, Mo, Zr and Y ions 4.7 Application of implantation technology ... With permission.) Fig 4.39 Dependence of forces of adhesion of TiN coating, deposited on glass by means of magnetron sputtering and implanted by krypton ions of 500 keV energy: a) on ion dose at

Ngày tải lên: 10/08/2014, 12:21

... forest stands The amount of precipitation recorded by the standard rain gauge enables the correction of the water flux The use of the values of the standard rain gauge to compute fluxes of elements ... volume and standard deviation were determined for several combinations of different numbers of collectors From this set of data, for each season, a regression of the standard error in percent of ... some forested ecosystems of Westland, New Zealand’, New Zealand Journal of Botany 23, 407–415 Lewis, W M Jr and Grant, M C.: 1978, ‘Sampling and chemical interpretation of precipitation for mass...

Ngày tải lên: 23/03/2014, 23:20

... successful coupling of the RGD to the surface of the liposomes Assay of particle sizes and morphological observation of RGD-M-LCL The average size of liposomes processed by the microfluidizer was ... RGD-LCL of 0.625 mg/mL), (D) matrine (0.0625 mg/mL), (E) RGD-LCL (1.25 mg/mL), and (F) RGD-M-LCL (equivalent to matrine of 0.0625 mg/mL and RGD-LCL of 1.25 mg/mL) Figure Representative results of ... min, and subsequently back to 10% B over (19) The detection wavelength was 214nm, the flow rate was 1mL/min, and the injection volume was 20μL Lyophilization of RGD-M-LCL and measurement of its...

Ngày tải lên: 26/10/2012, 08:57

... of the “New Approach” to technical harmonisation and standardisation of products and is based on: - mandatory essential health and safety requirements (which must be met before machinery is placed ... High demand or continuous mode of operation Low demand mode of operation (Probability of a dangerous failure per hour) (Average probability of failure to perform its design function on demand) PFHd ... types of machines EN ISO 12100 (former EN292) • B standards Safety standards applying to specific aspects of safety or a particular device valid for a wide range of machines • B1 standards Standards...

Ngày tải lên: 15/02/2014, 08:44

... ‘ON’ if the operand bit is ‘ON’ and it is ‘OFF’ when the operand bit is ‘OFF’ On the other hand, a NC condition is ‘ON’ if the operand bit is ‘OFF’ and it is ‘OFF’ when the operand bit is ‘ON’ ... (on => on and off => off) and an NC condition follows inverted bit status (on => off and off => on) Execution conditions In a ladder logic program, the logical combination of ‘ON’ and ‘OFF’ conditions ... the ratio of the number of turns per phase (a = N1/N2) and the type of connection Table 1.1 gives a quick view of primary-line voltages and line currents and secondary-phase voltages and currents...

Ngày tải lên: 07/03/2014, 08:20

... Noise and vibrations of the handpiece or motor Ergonomy and mobility of the device Costs Over/under -preparation Instruments Fins and recesses Motor or handpiece Increase in canal area Life-span of ... 350 r.p.m electric vs airdriven handpiece Method torque ProFile 0.06 Ni–Ti Pow-R 0.04 ProFile 0.04 ProFile 0.04 and 0.06 ProFile 0.04 and 0.06 ProFile 0.04 ProFile 0.04 Ni–Ti system operators ... Non-Instrumental Technique of Lussi demonstrating insufficient cleaning ability with lots of remaining debris and tissue (courtesy of Prof T Attin, ¨ Gottingen and Prof A Lussi, Bern) Preparation of oval root...

Ngày tải lên: 09/03/2014, 00:20