This study investigated and validated the optimum conditions for a supercritical fluid extraction (SFE) method using bis(2,4,4-trimethylpentyl)monothiophosphinic acid as a chelating ligand, for subsequent ICP-MS analyses of mercury, cadmium and lead in sediment. Several combinations of pressure, temperature and modifier (P-T-M) conditions for SFE were tested and an appropriate collection solven...

TPIF-RL method is a new that gives better wall thickness in incremental forming. In this method, the sheet not fixed at edges. Like deep drawing process, it compressed with certain pressure. During forming flows under blankholder. Thus, more homogenous ob-tained.In study, Titanium Grade 2 formed as cone via method. Optimum parameters were determined by Signal/Noise analysis. addi-tion, finite e...

AbstractHydroforming process is a deep stretching process only with the difference that a fluid is used instead of the mandrel. This paper investigates the hydroforming process of non-cylindrical and non-spherical geometries using finite element analysis software to calculate the influences of effective process parameters such as the coefficient of friction between the surfaces and the pressure...

The optimum choice of filament material is very application dependent, and interactions of the gas with the cathode material must be carefully considered. Filaments, in both wire and ribbon shapes, are required to (1) supply a stable electron emission current with reasonable energy input and filament temperature, (2) have reduced chemical reactivity with the rarefied environment being measured,...

investigations are carried out to evaluate the performance of a low heat rejection (lhr) diesel engine consisting of air gap insulated piston with 3-mm air gap, with superni (an alloy of nickel) crown and air gap insulated liner with superni insert with different operating conditions of crude jatropha oil with varied injection timing and injection pressure.  performance parameters of brake ther...

OBJECTIVES To compare the finger pressure applied by dentists during cementation and to examine the effect of gender and time of day on finger pressure. METHODS Fifteen dentists (9 males, 6 females) formed a study group and 10 master dies in premolar shape and Turcom Cera all-ceramic crowns were prepared to measure the maximum finger pressure applied by dentists during cementation. The dentis...

INTRODUCTION AND OBJECTIVES Little information is available about the control of arterial hypertension in the elderly population. The aim of this study was to investigate hypertension control, factors associated with poor control, and general practitioners' responses to poor control in a large sample of hypertensive patients aged 65 years or older receiving primary care in Spain. PATIENTS AND...

This comprehensive review summarizes the evidence regarding use of cerebral autoregulation-directed therapy at the bedside and provides an evaluation of its impact on optimizing cerebral perfusion and associated functional outcomes. Multiple studies in adults and several in children have shown the feasibility of individualizing mean arterial blood pressure and cerebral perfusion pressure goals ...

Several commercial instruments are available for pressure measurements. As per ISO stipulations, whenever such instruments are used for precise and accurate pressure measurements, it is obligatory on the part of measurement authority to indicate the quality of results. Stability of the pressure measuring instruments over the years is one of the important parameters in defining the quality of re...

The aim of the current study is to develop a numerical tool that is capable of achieving an optimum shape and design of hyperbolic cooling towers based on coupling a non-linear finite element model developed in-house and a genetic algorithm optimization technique. The objective function is set to be the minimum weight of the tower. The geometric modeling of the tower is represented by means of ...