Estimation of related substancesby usinghigh-performance liquid chromatographic method was developed and validated for the determination of Tigecycline in the present work. Reversedphase chromatography was performed on Waters 2489 UV 2695 pump, Waters 2998 PDA 2695 pump Software Empower2 photodiode array detector using Zorbax Eclipse plus C18 (100 mm × 4.6 mm, 1.8 μm particle size) column with ...

This investigation aims to explore determinants of exposure to particle size-specific welding fume. Area sampling of ultrafine particles (UFP) was performed at 33 worksites in parallel with the collection of respirable particles. Personal sampling of respirable and inhalable particles was carried out in the breathing zone of 241 welders. Median mass concentrations were 2.48 mg m(-3) for inhalab...

Abstract Inconel 690 has been extensively used in steam generator tubing materials for pressurized water reactors. In order to improve the weld quality of 690, ultrasonic-assisted pulsed tungsten inert gas (TIG) welding is studied. this study, macrostructure, microstructure, and mechanical properties weldments welded by TIG with without ultrasonic assistance were investigated. The microstructur...

Abstract Activated tungsten inert gas (A-TIG) welding is one variant of conventional TIG where a thin layer suitable activating flux deposited on the parent components prior to constituting arc in order harness enhanced penetration. Despite several benefits, industries are still reluctant overwhelmingly using this new variant. This article attempts highlight productivity benefits employing A-TI...

Austenitic stainless steel SS304 grade was welded with active Tungsten Inert Gas (TIG) welding process by applying a flux paste made of SiO2 powder and acetone. SiO2 flux application improves the weld bead depth with a simultaneous reduction in weld bead width. The improvement in penetration results from arc constriction and reversal of Marangoni convection. Experimental studies revealed that t...

Abstract According to the IIW recommendation, fatigue strength of welded steel joints is defined as independent base material in case as-welded condition. However, post-treatment techniques can improve performance structures, especially for increased strengths. Therefore, this paper investigates effect TIG dressing, common post-weld treatment method, on high-strength S700 cruciform joints. The ...

Twin-wire and arc additive manufacturing (T-WAAM) has potential advantages in improving deposition efficiency functionally graded materials (FGMs), thus attracting much attention. However, there are few studies on the droplet transfer mode of T-WAAM. This paper analyzes swing “TIG + AC” twin-wire cross-arc by in-situ observation with high-speed photography, revealing what factors influence T-WA...

As CeO2 is a useful catalyst for soot elimination, it important to develop with higher contact areas, and reactivities efficient oxidation catalytic are basically controlled by structures surface properties of catalysts. Herein, Ce-Metal organic framework (MOFs) consisting Ce benzene-1,3,5-tricarboxylic acid (H3BTC) employed as the precursor CeBTC exhibits unique bar-like high-aspect-ratio morp...

The TIG welding process has shallow penetration. addition of activated flux can increase the depth penetration weld, which is called A-TIG welding, so this study to analyze effect type and current on penetration, hardness, microstructure, corrosion rate. This used SUS 304 A36 materials with a thickness 6 mm are welded using variations Fe2O3, Cr2O3 in strength 100 amperes 120 amperes. To find ou...