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261
Electrocoagulation treatment of reject brine effluent from Solvay process
Published 2019“…Three-experiment design levels and response surface methodologies were used to model the system. A second-order polynomial model was developed and used to predict the optimum conditions, which were found to be at a 0.2 A/cm2 current density, 36.8°C temperature, and initial Cl− concentration of 7.4 × 103mg/L. …”
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262
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263
Occurrence and removal characteristics of phthalate esters from bottled drinking water using silver modified roasted date pits
Published 2021“…Batch adsorption isotherms were used to study and establish the efficiency of such adsorbents in removing phthalate esters, in which they describe the adsorbent-adsorbate interaction systems. Adsorption efficiency of the various adsorbents was investigated by using different adsorbent masses (0.05�g, 0.10�g, and 0.15�g) and temperature (30��C, 50��C, and 60��C). …”
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264
Global age-sex-specific fertility, mortality, healthy life expectancy (HALE), and population estimates in 204 countries and territories, 1950–2019: a comprehensive demographic anal...
Published 2020“…HIV-free life tables were then estimated using estimates of under-5 and adult mortality rates using a relational model life table system created for GBD, which closely tracks observed age-specific mortality rates from complete vital registration when available. …”
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265
Global age-sex-specific fertility, mortality, healthy life expectancy (HALE), and population estimates in 204 countries and territories, 1950–2019: a comprehensive demographic anal...
Published 2020“…HIV-free life tables were then estimated using estimates of under-5 and adult mortality rates using a relational model life table system created for GBD, which closely tracks observed age-specific mortality rates from complete vital registration when available. …”
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266
Collision/reaction cell ICP-MS with shielded torch and sector field ICP-MS for the simultaneous determination of selenium isotopes in biological matrices
Published 2011“…The determinations of selenium isotopes in biological samples were performed using both inductively coupled plasma collision/reaction cell quadruple mass spectrometer (CRC-ICP-QMS) and inductively coupled plasma sector field mass spectrometers (SF-ICP-MS). To significantly decrease the argon-based interferences at m/z 74 (36Ar38Ar), 76 ( 38Ar38Ar, 40Ar36Ar), 78 ( 38Ar40Ar), and 80 (40Ar40Ar), the gas-flow rates of a helium and hydrogen mixture used in the collision cell were optimized to 1.0 mL/min H2 and 3.5 mL/min He. …”
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267
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268
Gelation of Emulsified Polyacrylamide/Polyethylenimine under High-Temperature, High-Salinity Conditions: Rheological Investigation
Published 2018“…A lower rate of cross-linking is achieved when emulsified PAM/PEI systems are compared with nonemulsified PAM/PEI systems. …”
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269
Novel Ternary Adder and Multiplier Designs without Using Decoders or Encoders
Published 2021“…Multiple-Valued Logic systems present significant improvements in terms of energy consumption over binary logic systems. …”
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270
Comprehensive thermoeconomic, exergoeconomic, and optimization analyses of direct oxy-combustion supercritical CO2 intercooled and reheated cycles under design and off-design condi...
Published 2022“…At off-design conditions with a power demand (PD) of 40% of the design load (50 MW), the thermal efficiency is decreased by 21.82% in DRC, 17.71% in ICC, 22.46% in PIC, and 13.60% in RHC. …”
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271
Influence of Fines on the Compressibility of Surface Sands in Kuwait
Published 2020“…Moreover, with increasing fines, the compressibility increased as demonstrated by the larger values of Cc at all degrees of relative compaction except at 100% and that the coefficient of consolidation Cv decreased with increasing fines, which means that as the fines increase the time required to achieve a certain degree of consolidation will also increase.…”
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272
Preliminary Observations On The Relative Growth And Production Of Tilapia Species Cultured In Cages At Three Stocking Densities
Published 1987“…Survival rates at the three densities ranged between 97.5—100% indicating that Tilapia species are able to withstand a certain degree of crowding, which is an important characteristic in the intensive culture of the fish.…”
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273
Towards An Effective Urban Growth Management Strategy In Qatar (1)
Published 2000“…This paper aim at reviews the current problems associated with the lack of an urban growth management strategy in the State of Qatar and outlines the process of creating a comprehensive system to effectively handle urban growth. …”
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274
Effects of combined calcium hypochlorite and chlorine dioxide on drinking water quality in Qatar and disinfection by-products formation
Published 2017“…Chlorite concentration reductions were observed from the first day forward as 59, 65, 68, 94, 100, and 100%, and 17.4, 22.1, 39.2, 63.9, 66.0, 68.9% (from 0.157 to 0.049 mg/L) respectively based on observed means for seven days the commensurate respective chlorate concentrations increases were 196, 344, 516, 602, 703, 787% (from 0.035 to 0.313 mg/L) based on observed mean values for seven days. …”
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275
Effects of Combined Calcium Hypochlorite and Chlorine Dioxide on Drinking Water Quality in Qatar and Disinfection by Products Formation
Published 2016“…Chlorite concentration reductions were observed from the first day forward as 59, 65, 68, 94, 100, and 100%, and 17.4, 22.1, 39.2, 63.9, 66.0, 68.9% (from 0.157 to 0.049 mg/l) respectively based on observed means for seven days the commensurate respective chlorate concentrations increases were 196, 344, 516, 602, 703, 787% (from 0.035 to 0.313 mg/l) based on observed mean values for seven days. …”
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276
Dose of Bicarbonate to Maintain Plasma pH During Maximal Ergometer Rowing and Consequence for Plasma Volume
Published 2022“…During CON, pH decreased from 7.42 ± 0.01 to 7.17 ± 0.04 (mean and SD; p < 0.05), while during BIC, pH was maintained until the sixth minute where it dropped to 7.32 ± 0.08 and was thus higher than during CON (p < 0.05). …”
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277
Performance assessment of inductive power transfer for railway applications
Published 2015“…The practical implementation has been conducted at a rated voltage of 100V DC at 50kHz and input power of 80W. …”
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278
Mechanical and microstructure characterization of hard nanostructured N-bearing thin coating
Published 2015“…The main problem with steel, is that it exhibits a relatively low hardness (below 10GPa) which strongly decreases upon annealing above about 600K. …”
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279
The spectral and morphological studies of the conductive polyaniline thin film derivatives by the in situ copolymerization
Published 2017“…The blue shift in the band indicates that there is a decrease in the extent of conjugation system along the copolymer. …”
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280
High temperature thermal stability of innovative nanostructured thin coatings for advanced tooling
Published 2014“…The main problem with steel, isthat itexhibits a relatively low hardness (below 10 GPa) which strongly decreases upon annealing above about 600 K.Thus, the majority of modern tools are nowadays coated with hard coatings that increase the hardness, decrease the coefficient of friction and protect the tools against oxidation. …”
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