7— storage and identification of materials

... containing raised levels of Si and Cr Figure 7.3 shows the microstructure of the steel It is normally Table 7.1 Chemical composition of valve spring material (%) The quantities of Si and Cr are high Valve ... lubricants When 148 Science and technology of materials in automotive engines 200 µm (a) 200 µm (b) 6.16 Microstructures of a Ti valve; (a) acicular microstructure at the crown and (b) equiaxed one ... occurs when each turn of the coil spring vibrates up and down at high frequency, independently of the motion of the entire spring It takes place when the natural frequency of the valve spring coincides...

Ngày tải lên: 10/08/2014, 12:21

... physical meaning of the spectral pressure modes as well as the linkage between the pressure modes and hidden events of the unsteady pressure fields Synthesis and identification of random pressure ... ratios of B/D=1 and B/D=5 in the wind tunnel tests Proper orthogonal decomposition 2.1 Definition The POD is optimum approximation of random field The main idea of the POD is to find out a set of ... orthogonal basic vectors which can expand a multi-variate random process into a sum of products of these basic orthogonal vectors and single-variant uncorrelated random processes Let consider the...

Ngày tải lên: 05/03/2014, 14:20

... Mechanics and Strength of Materials Vitor Dias da Silva Mechanics and Strength of Materials ABC Vitor Dias da Silva Department of Civil Engineering Faculty of Science & Technology University of Coimbra ... Mechanics of Materials I Introduction I.1 General Considerations Materials are of a discrete nature, since they are made of atoms and molecules, in the case of liquids and gases, or, in the case of ... awareness of the lack of a treatise, written in European Portuguese, which contains the theoretical material taught in the disciplines of the Mechanics of Solid Materials and the Strength of Materials, ...

Ngày tải lên: 14/03/2014, 12:20

... chemical structure of the standard had been confirmed by NMR analysis The standard was further purified by RP-HPLC and stored at )70 °C Materials and methods Enzymatic assays Biological materials Tissue ... (500 MHz) spectrum of the product of P450scc-mediated side-chain cleavage of 7-DHC (A) Spectrum of the enzymatic side-chain cleavage of 7-DHC; (B) spectrum of 7-DHP synthetic standard secondary ... rate of 0.5 mLÆmin)1 and temperature of 40 °C The mobile phase from to 30 consisted of 85% (v/v) methanol and 0.1% (v/v) acetic acid, and from 30 to 75 of 98% (v/v) methanol and 0.1% (v/v) acetic...

Ngày tải lên: 23/03/2014, 13:20

... Mechanics of Materials I Introduction I.1 General Considerations Materials are of a discrete nature, since they are made of atoms and molecules, in the case of liquids and gases, or, in the case of ... awareness of the lack of a treatise, written in European Portuguese, which contains the theoretical material taught in the disciplines of the Mechanics of Solid Materials and the Strength of Materials, ... theoretical texts and exercises prepared and improved on by the author between 1989-94, for the disciplines of Applied Mechanics II (Introduction to the Mechanics of Materials) and Strength of Materials, ...

Ngày tải lên: 08/04/2014, 11:23

... The presence of the added water increases the intensity of the bands at about 3500 and 1650 cm 21 (b) Major disruption of the Al environment is indicated by the loss of the Si–O–Al band at 810 ... presence of monovalent cations such as Na or K Some of the details of polysialate formation and technology are still not fully understood The purpose of this work is to elucidate aspects of the ... consisting of randomly developed Al– Si polyhedra with a lack of periodically repeating atomic ordering A selection of 11.7 T solid-state MAS NMR spectra of the starting material (metakaolinite) and...

Ngày tải lên: 30/05/2014, 12:08

... MALDI-TOF/TOF MS and LC-ESI-Q-TOF MS This "shotgun" strategy resulted in a lower number of total spectra and identified a lower number of peptides, but yielded a comparable number of protein identifications ... 115–122) of the L3L protein Method 5: MALDI-TOF/TOF MS Direct trypsin digests of the membrane- and core-enriched fractions were also analyzed using MALDI-TOF/TOF MS to take advantage of complementary ... desorption ionization tandem mass spectrometer with time -of- flight/time -of- flight optics (MALDI-TOF/TOF), 2.) a quadrupole-time of flight mass spectrometer (LC-ESI-Q-TOF), and 3.) a quadrupole...

Ngày tải lên: 19/06/2014, 08:20

... MALDI-TOF/TOF MS and LC-ESI-Q-TOF MS This "shotgun" strategy resulted in a lower number of total spectra and identified a lower number of peptides, but yielded a comparable number of protein identifications ... 115–122) of the L3L protein Method 5: MALDI-TOF/TOF MS Direct trypsin digests of the membrane- and core-enriched fractions were also analyzed using MALDI-TOF/TOF MS to take advantage of complementary ... desorption ionization tandem mass spectrometer with time -of- flight/time -of- flight optics (MALDI-TOF/TOF), 2.) a quadrupole-time of flight mass spectrometer (LC-ESI-Q-TOF), and 3.) a quadrupole...

Ngày tải lên: 20/06/2014, 04:20

... and only minimal presence of Muc16 on the cell surface (Figs 6a–d) Similar results were obtained with both the 618F and 653F antibodies (Fig 6c and 6d) Discussion Figure ting Identification of ... SDS-PAGE and probed with a panel of anti-MUC16 monoclonal antibodies Arrows indicate migration of 250 kDa molecular weight marker and identity of antibody used is shown on the right of each blot ... Specificity of 618F for human MUC16 Specificity of 618F for human MUC16 (A) Purity of human MUC16 isolated from spent media of OVCAR-3 cells as determined by Coomassie Blue (1) and silver staining (2) of...

Ngày tải lên: 20/06/2014, 07:20

... Switzerland) Once suspicious colonies are identified, confirmation of the isolates as E coli O157:H7 is dependent upon biochemical identification and demonstration of the presence of somatic and ... strains), C1-6 (strains of Cornell Univ.) and P1-7 (strains from E coli reference center of Pennsylvania State Univ.) b The presence of Stx1 and Stx2 “-” and “+” indicate negative and positive, respectively ... assessment of the risks difficult, and the options for management and control unclear The objectives of this study are (i) to examine the prevalence of E coli O157:H7 in slaughterhouses and retail...

Ngày tải lên: 07/08/2014, 18:21

... logarithm of the highest dilution of serum that could neutralize 100 TCID50 of the virus Total RNA was extracted from the giant pandas’ spleens, infected and non-infected FCWF cells (as positive and ... indicates the cytoblast of an infected FCWF cell The black arrow indicates the inclusion bodies of GPV in the cytoplasm of cells Scale bars = 200 nm Isolation and identification of a canine coronavirus ... manufacturer’s recommendations and then sequenced The sequence was analyzed by GENETYX version 9.0 computer software (Software Development, Japan) and DNAMAN version 4.0 (Lynnon BioSoft, Canada) Bacteriology...

Ngày tải lên: 07/08/2014, 23:22

... is the number of non-seed genes above the cutoff, True negatives is the number of non-seed genes below the cutoff, and False negatives is the number of seed genes below the cutoff Random prediction ... molecular mechanisms of human diseases, and can in turn guide the development of relevant therapy as illustrated in the case of Alzheimer's disease and hypercholesterolemia Materials and methods Human ... randomly assembled disease gene sets (see Materials and methods) (a) Box plots of AUCs of disease gene prioritization performances for 110 diseases, based on diseasecentric assessment (see Materials...

Ngày tải lên: 09/08/2014, 20:20

... 45 and 30 in the second and third rounds individually, and increasing washing with TBST for times and times in the second and third round individually Sequence Analysis of Selected Phages and ... controls Immunofluorescence Microscopy and Image Analysis Immunofluorescence microscopy was used to study the affinity of synthetic peptide (ZT-2) binding to A498 and renal carcinoma A498 and HK-2 ... Guangdong Province of the People’s Republic of China (2008B030301082), Doctoral Initiating Project, and Natural Scientific Foundation of Guangdong Province of the People’s Republic of China (No.7301521)...

Ngày tải lên: 10/08/2014, 10:21

... properties of metals can be modelled and predicted Part II discusses the implications of this research for improving steelmaking and steel properties Details of these and other Woodhead Publishing materials ... chapter gives the function and materials technology of an individual part of the engine Appendix A is intended for the reader who has less knowledge of the basics of materials technology The reader ... the business of car parts and materials, and students who are learning mechanical engineering or materials engineering The topics are centered on recent technologies as well as standards Accordingly,...

Ngày tải lên: 10/08/2014, 12:21

... Low-pressure die casting 42 2.7.1 Science and technology of materials in automotive engines Sand casting Sand casting can produce aluminum blocks like those of cast iron A typical resin bonded mold ... discussed in this chapter and are summarized in reference.49 In considering 50 Science and technology of materials in automotive engines Sand core Cast iron liner 2.43 Sand core (shell mold core) ... °C, 58 Science and technology of materials in automotive engines could withstand hot combustion gas Figure 3.7 describes key requirements and reinforcement methods for aluminum and iron pistons...

Ngày tải lên: 10/08/2014, 12:21

... reduced, sealability and oil consumption cannot be maintained, and the roundness and straightness of the bore must also be taken into account 104 4.4.2 Science and technology of materials in automotive ... the increased concentrations of Cu, Cr and Mo The tempered martensite microstructure of flaky graphite iron gives a bending strength of 400 MPa and an elastic modulus of 100 GPa, while that 25 µm ... fatigue strength and toughness of cast iron mean that it is not possible to reduce the weight of the rings by lowering h1 Steel rings8 using spring steel 100 Science and technology of materials in...

Ngày tải lên: 10/08/2014, 12:21

... Science and technology of materials in automotive engines and valve lifter, and which can therefore cause problems that result in wear at the point of contact Figure 5.7 shows an example of flaking ... solidification temperature of cast iron is proportional to the sum of the percentage of carbon and one-third of the percentage of silicon This is known as the CE value and is measured using a CE ... whilst the central portion is softer at 25 HRC These microstructures correspond to the chill of Fig 5.11(b) and the flaky graphite 122 Science and technology of materials in automotive engines...

Ngày tải lên: 10/08/2014, 12:21

... white etching region consists of hard ferrite and pearlite 180 Science and technology of materials in automotive engines are the cause of the pitting This type of failure is likely to appear ... mainly used for motorcycles The type of crankshaft determines what kind of connecting rods are used, and the possible combinations of crankshafts and connecting rods and their applications are listed ... a vacuum to a carburizing temperature of between 900 °C and 1050 °C The carburizing gas is then admitted through jets and 186 Science and technology of materials in automotive engines thermally...

Ngày tải lên: 10/08/2014, 12:21

... the center of this round area 200 Science and technology of materials in automotive engines radius between the crankpin and web, and at the oil hole or keyway of the shaft A sharp edge and rough ... hardening25 of the crankpin and the corner radii between the crankpin and web The assembled crankshaft uses induction hardening of the hole into which the crankpin is forcefitted and of the corner ... layered distribution of ferrite and pearlite After chemical etching, the difference in corrosion resistance of both microstructures exposes the fiber- 202 Science and technology of materials in automotive...

Ngày tải lên: 10/08/2014, 12:21