resistance spot welding defects ppt

... formation crater formation welding joint defects external weld defects internal weld defects hot cracks cold cracks cavities with weld metal welding defects due to material welding defects due to manufacture ... Trang 19 Welding Defects Trang 2Figures 9.1 to 9.4 give a rough survey about the classification of welding defects to DIN 8524 This standard does not classify existing welding defects according ... tension, the welding cur-rent is fixed by the wire feed speed (thus also melting rate) as shown in the middle part of the fig-ure Melting rate (resulting from selected welding parameters) and welding

Ngày tải lên: 07/12/2017, 03:13

... Part 2 Genetics of Neural Tube Defects 139 Chapter 8 Advances in Genetics of Non Syndromic Neural Tube Defects 141 Patrizia De Marco Trang 6Chapter 9 Neural Tube Defects in Algeria 163 Bakhouche ... Thoraco-Lumbar Neural Tube Defects 191 Chapter 11 Treatment of Large Thoraco-Lumbar Neural Tube Defects 179 Mehrdad Hosseinpour Trang 9Preface The book Neural Tube Defects - Role of Folate, ... Neural Tube Defects having 3 chapters and a Surgical Treatment of Large Thoraco-lumbar Neural Tube Defects which includes a chapter on surgical treatment of large lumbo - sacral defects The authors

Ngày tải lên: 17/03/2014, 02:20

... disabilities, while milder defects are associated with mainly muscular symptoms.Such a correlation is not seen in patients with medium- and short-chain defects.In these diseases mild defects may not be ... 1970s [5], defects in many enzymes and transport proteins involved in the oxidation of fatty acids have been discovered (Table 1) The clinical features in patients with different defects, and ... life-threatening episodes are rarely seen in the defects of short-chain fatty acid oxidation, where the most common symptoms are neuromuscular Despite the fact that defects of the long-chain fatty acid metabolism

Ngày tải lên: 23/03/2014, 12:20

... Technology, Haifa, Israel Introduction P-glycoprotein [Pgp; multidrug resistance protein (MDR) 1] (ABCB1) [1] and the multidrug resistance-associated protein (MRP) 1 (ABCC1) [2] were recog-nized ... m-chlorophenylhydrazone; FRET, fluorescence resonance energy transfer; MDR, multidrug resistance; MRP1, multidrug resistance-associated protein; Pgp, P-glycoprotein; TMA-DPH, trimethylammonium-diphenyl-hexatriene; ... of drugs by multi-drug resistance proteins FEBS Lett 580, 1085–1093 16 Yeheskely-Hayon D, Regev R, Katzir H & Eytan GD (2009) Competition between innate multidrug resistance and intracellular

Ngày tải lên: 29/03/2014, 08:20

... part being hard-faced is positioned for downhand welding When down-hand welding is not practical, select an electrode recommended for all-position welding Simpo PDF Merge and Split Unregistered ... ARC REMOVE BEARINGS BEFORE WELDING) Track Rollers Primary Electrode: Page 1-24 Alternate Electrodes: Pages 1-5, 1-3 Welding Procedures: Mount roller on jig for downhand welding Apply transverse ... be slow cooled after welding Weld deposits on cast iron should be peened to help relieve stresses BUILDUP MATERIALS AND BASE METALS Considerable differences exist between welding materials used

Ngày tải lên: 20/06/2014, 18:20

... 10Carbon Steel Pipe WeldingPipe welding studies comparing MAPP gas and acetylene show that they allow comparable welding speeds on pipe 2 in or less in diameter Oxy-acetylene welding is somewhat ... faster on larger pipe Cast Iron Welding MAPP gas readily welds cast iron Use a neutral flame with a welding tip that produces a bulbous pattern Aluminum Welding Welding aluminum with MAPP gas ... will appear oxidizing THE PROPER WELDING TIP IS ONE SIZE LARGER THAN THAT NORMALLY USED FOR OXY-ACETYLENE WELDING Use the forehand method, which requires the welding to be done uphill Hold the

Ngày tải lên: 20/06/2014, 18:20

... contact resistance between Mg and n-Si can be extrapolated by the following formula: T c c / 2 R d z R ρ = + , (1) where R T is the total resistance, and R c is the contact resistance. ... more than 1 sun due to high-series resistance. A small front metal contact area [4, 5] and a low metal density in Ag-screen printed lines contribute to the high resistance [6]. The presence of ... phosphorus. The contact resistance is decided by the doping density of impurity and the work function difference between Si and the metal. To achieve decreased contact resistance, it is important

Ngày tải lên: 20/06/2014, 21:20

... ways: S Semiautomatic Welding - equipment controls only the electrode wire feeding Movement of welding gun is controlled by hand This may be called hand-held welding. S Machine Welding - uses a gun ... that welding sparks and hot materials from welding can easily go through small cracks and openings to adjacent areas D Watch for fire, and keep a fire extinguisher nearby D Be aware that welding ... falling or tipping D Keep cylinders away from any welding or other electrical circuits D Never drape a welding torch over a gas cylinder D Never allow a welding electrode to touch any cylinder D Never

Ngày tải lên: 27/06/2014, 05:20

... cells were co-transfected with UAS-Flag-dilp2, Act-Gal4 and a third vector containing a blasticidin-resistance gene, using effectene transfection reagent (Qiagen) Two days after the transfection, ... DDiissttiinncctt aanndd oovveerrllaappppiinngg ffuunnccttiioonnss ooff iinnssuulliinn aanndd IIGGFF II rreecceeppttoorrss Endocr Rev 2001, 2222::818-835 3 Efstratiadis A: GGeenettiiccss ooff mmoouussee ggrroowwtthh ... 1166::3-34 6 Yamanaka Y, Wilson EM, Rosenfeld RG, Oh Y: IInnhhiibbiittiioonn ooff iinnssuulliinn rreecceeppttoorr aaccttiivvaattiioonn bbyy iinnssuulliinn lliikkee ggrroowwtthh ffaaccttoorr bbiinnddiinngg

Ngày tải lên: 06/08/2014, 18:21

... Trang 1R E V I E W Open AccessThe anti-vaccination movement and resistance to allergen-immunotherapy: a guide for clinical allergists Jason Behrmann Abstract Despite ... public debates concerning the safety of vac-cines resemble mass-hysteria The consequence of growing resistance towards vacci-nation is the increase in morbidity and mortality from the resurgence of ... anti-vaccine movement will provide a basis for an informa-tional guide aimed at countering patient resistance to allergen-immunotherapy originating from the anti-vac-cine movement Since the foundations

Ngày tải lên: 08/08/2014, 21:20

... transduced cells were challenged with X4 and R5 tropic HIV-1, they demonstrated marked viral resistance HIV-1 resistance was also observed in bispecific lentiviral vector transduced primary PBMCs Conclusions: ... lentiviral construct Resistance of siRNA transduced cells to HIV-1 infection To determine if down regulation of the essential corecep-tors, CXCR4 and CCR5, translated to virus resistance, transduced ... Trang 1Bio Med CentralAIDS Research and Therapy Open Access Research HIV-1 resistance conferred by siRNA cosuppression of CXCR4 and CCR5 coreceptors by a bispecific lentiviral

Ngày tải lên: 10/08/2014, 05:20

... minor effect on K pneumoniae resistance to polymyxin B On the other hand, deletion of ugd or pmrF gene resulted in a drastic reduction of the resistance The polymyxin B resistance was shown to be ... higher resistance to polymyxin B in both ΔrcsB mutant and its parental strain This indicated a protective effect of large amounts of CPS in polymyxin resistance PmrF is involved in polymyxin B resistance ... the expression of pmr for the resistance to polymyxin B Conclusions: The study reports a role of the capsular polysaccharide level and the pmr genes for K pneumoniae resistance to polymyxin B The

Ngày tải lên: 10/08/2014, 05:21

... most important MIG welding 145 Contact tip Filler wire Castellated gas shroud Downward force Weld pool 7.20 Schematic of the MIG spot welding process. Table 7.7 Spot and plug welding parameters ... speed MIG spot welding may be used to lap weld sheets together by melting through the top sheet and fusing into the bottom sheet without moving the torch The equipment used for spot welding is ... the number of defects reduced • Fewer stops and starts, hence fewer defects • Higher welding speeds means less heat input, narrower heat affected zones and less distortion • Higher welding current

Ngày tải lên: 10/08/2014, 12:21

... Arc Welding References cited in this section WELDING HANDBOOK, Trang 24WELDING HANDBOOK,WELDING HANDBOOK, WELDING HANDBOOK, Arc Welding of Carbon Steels Ronald B Smith, The ESAB Group, Inc WELDING ... METALLURGY, TIG AND PLASMA WELDING, ASM HANDBOOK, MIG WELDING HANDBOOK, SUBMERGED ARC WELDING HANDBOOK, TIG WELDING HANDBOOK, WELDING HANDBOOK, Welding of Low-Alloy Steels F.J Winsor, Welding Consultant ... Trang 25WELDING HANDBOOK,WELDING HANDBOOK, WELDING HANDBOOK, Arc Welding of Carbon Steels Ronald B Smith, The ESAB Group, Inc Selected References WELD J., SUBMERGED ARC WELDING, WELD J., WELDING

Ngày tải lên: 10/08/2014, 12:22

... in Ror1 and Ror2 (required for mlo-specified resistance) [19,20], Rar1 (required for Mla12 resistance) [21] and Rom1 (restoration of Mla12-specified resistance) [22] After inoculating conidial ... mediated resistance (RAR1, SGT1 and HSP90) do not [13] Here, we used the M oryzae ssd1 mutant to examine the role in basal defense of genes required for penetration resistance and R-gene mediated resistance ... race-specific resistance trig-gered by resistance gene Mla12 against B graminis f sp hordei expressing the avirulence gene AvrMla12 [28,29] Rom1was identified as a restoration of Mla12-specified resistance

Ngày tải lên: 11/08/2014, 11:21

... level of resist-ance against gray leaf spot and bacterial spot diseases [23] Similarly, wheat plants transformed with Arabidopsis NPR1 resulted in enhanced resistance against Fusarium graminearum ... transgenic plants has been shown to induce broad-spectrum resistance For example, overexpression of NPR1 led to development of constitu-tive enhanced resistance against the bacterial pathogen Pseudomonas ... enhanced resistance against the blast patho-gen, Xanthomonas oryzae pv oryzae in transgenic rice [21,22] In tomato, overexpression of the Arabidopsis NPR1 gene resulted in an enhanced level of resistance

Ngày tải lên: 12/08/2014, 03:21

... within a distance of 500 bp for most resistance candidate genes in this study Hence, LD based association analysis is feasible and promising for QTL fine mapping of resistance traits in ryegrass Background ... evolutionary questions [16-18] Resistance genes are very abundant in plant genomes and the majority belongs to clustered gene families So far, sequence diversity of resistance genes has mainly been ... of sites with 3 or 4 SNP variants Gene structures of 11 candidate resistance genes Figure 1 Gene structures of 11 candidate resistance genes Trang 5On average, the percentage of polymorphic sites

Ngày tải lên: 12/08/2014, 05:20

... specifies resistance to two races of the fungalpathogen Hyaloperonospora parasitica (formerly Peronospora parasitica) [3] The activation of SNC1 (for suppressor of npr1-1, constitutive 1) causes resistance ... strain Columbia – cpr1, snc1, and bal – map to the RPP5 locus, which contains a cluster of disease Resistance genes The similar phenotypes, gene expression patterns, and genetic interactions observed ... (for recognition of Peronospora parasit-ica 5) locus in the Columbia strain is composed of seven Resistance (R) genes that are implicated in plant innate immunity (Figure 1A) [1] R genes in this

Ngày tải lên: 12/08/2014, 05:20

... the average heat resistance of L monocytogenes or, more desir-ably, has heat resistance equal to that of the most resistant strains of this species In the pre-sent work, heat resistance results ... evaluate, summarize and compare heat resistance data reported for Campylobacter, Enterococcus, Es-cherichia, Listeria, Salmonella and Yersinia spp The work was limited to resistance in liquids with pH ... reported indicate that L innocua may have greater average heat resistance than L monocy-togenes However, as mentioned, only few heat resistance results are reported for L innocua and more research

Ngày tải lên: 12/08/2014, 15:20

... mutations causing resistance to RTIs have been shown to occur mainly in the DNA pol domain of RT, recent studies have implicated mutations in the C-terminal region of RT in resistance and possibly ... N348I mutation is associated with M184V and TAMs, and increases resistance to NRTIs such as AZT, as well as the NNRTI NVP N348I confers resistance by reducing RNase H activity which allows more time ... Same as (A) but with the following 12 RT drug resistance codons removed from the aligned single-genome sequences to determine the effect of drug resistance mutations on viral evolution: 62, 69,

Ngày tải lên: 13/08/2014, 01:20