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- Armesto, N., et al.
(författare)
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Heavy-ion collisions at the LHC-Last call for predictions
- 2008
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Ingår i: Journal of Physics G. - : IOP Publishing. - 0954-3899 .- 1361-6471. ; 35:5, s. 054001-
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Forskningsöversikt (refereegranskat)abstract
- This writeup is a compilation of the predictions for the forthcoming Heavy Ion Program at the Large Hadron Collider, as presented at the CERN Theory Institute 'Heavy Ion Collisions at the LHC - Last Call for Predictions', held from 14th May to 10th June 2007.
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| 4. |
- Hwang, JH, et al.
(författare)
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Effect of pH and sulfate concentration on hydrogen production using anaerobic mixed microflora
- 2009
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Ingår i: International journal of hydrogen energy. - : Elsevier BV. - 0360-3199 .- 1879-3487. ; 34:24, s. 9702-9710
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Tidskriftsartikel (refereegranskat)abstract
- The effects of varying sulfate concentrations with pH on continuous fermentative hydrogen production were studied using anaerobic mixed cultures growing on a glucose substrate in a chemostat reactor. The maximum hydrogen production rate was 2.8 L/day at pH 5.5 and sulfate concentration of 3000 mg/L. Hydrogen production and residual sulfate level decreased with increasing the pH from 5.5 to 6.2. The volatile fatty acids (VFAs) and ethanol fractions in the effluent were in the order of butyric acid (HBu) > acetic acid (HAc) > ethanol > propionic acid (HPr). Fluorescence In Situ Hybridization (FISH) analysis revealed the presence of hydrogen producing bacteria (HPB) under all pH ranges while sulfate reducing bacteria (SRB) were present at pH 5.8 and 6.2. The inhibition in hydrogen production by SRB at pH 6.2 diminished entirely by lowering to pH 5.5, at which activity of SRB is substantially suppressed.
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| 7. |
- Bhatnagar, Amit, et al.
(författare)
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Bromate removal from water by granular ferric hydroxide (GFH)
- 2009
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Ingår i: Journal of Hazardous Materials. - : Elsevier BV. - 0304-3894 .- 1873-3336. ; 170:1, s. 134-140
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Tidskriftsartikel (refereegranskat)abstract
- The feasibility of granular ferric hydroxide (GFH) for bromate removal from water has been studied. Batch experiments were performed to study the influence of various experimental parameters such as effect of contact time, initial bromate concentration, temperature, pH and effect of competing anions on bromate removal by GFH. The adsorption kinetics indicates that uptake rate of bromate was rapid at the beginning and 75% adsorption was completed in 5 min and equilibrium was achieved within 20 min. The sorption process was well described by pseudo-second-order kinetics. The maximum adsorption potential of GFH for bromate removal was 16.5 mg g−1 at 25 °C. The adsorption data fitted well to the Langmuir model. The increase in OH peak and absence of Br–O bonding in FTIR spectra indicate that ion-exchange was the main mechanism during bromate sorption on GFH. The effects of competing anions and solution pHs (3–9) were negligible. Results of the present study suggest that GFH can be effectively utilized for bromate removal from drinking water.
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| 8. |
- Bhatnagar, Amit, et al.
(författare)
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Removal of anionic dyes from water using Citrus limonum (lemon) peel: Equilibrium studies and kinetic modeling
- 2009
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Ingår i: Separation science and technology (Print). - : Informa UK Limited. - 0149-6395 .- 1520-5754. ; 44, s. 316-334
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Tidskriftsartikel (refereegranskat)abstract
- The present study was undertaken to evaluate the adsorption potential of Citrus limonum (lemon) peel as an adsorbent for the removal of two anionic dyes, Methyl orange (MO) and Congo red (CR) from aqueous solutions. The adsorption was studied as a function of contact time, initial concentration, and temperature by batch method. The adsorption capacities of lemon peel adsorbent for dyes were found 50.3 and 34.5 mg/g for MO and CR, respectively. The equilibrium adsorption data was well described by the Langmuir model. Three simplified kinetic models viz. pseudo-first-order, pseudo-second-order, and Weber and Morris intraparticle diffusion model were tested to describe the adsorption process. Kinetic parameters, rate constants, equilibrium sorption capacities, and related correlation coefficients for each kinetic model were determined. It was found that the present system of dyes adsorption on lemon peel adsorbent could be described more favorably by the pseudo-first-order kinetic model. The results of the present study reveal that lemon peel adsorbent can be fruitfully utilized as an inexpensive adsorbent for dyes removal from effluents.
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| 10. |
- Chung, SH, et al.
(författare)
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Impact of incremental risk factors on peritoneal dialysis patient survival: proposal of a simplified clinical mortality risk score
- 2009
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Ingår i: Blood purification. - : S. Karger AG. - 1421-9735 .- 0253-5068. ; 27:2, s. 165-171
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Tidskriftsartikel (refereegranskat)abstract
- <i>Background/Aim:</i> Peritoneal dialysis (PD) patient survival is influenced by many factors and there is no consensus on the relative importance of these predictors, independently or combined. This study was designed to evaluate how these independent factors, alone or in various combinations, may influence PD patient survival. <i>Methods:</i> A peritoneal equilibration test, subjective global assessment (SGA), and comorbid diseases (CMD) were assessed. <i>Results:</i> On multivariate analysis, age (>60 years), CMD, malnutrition, and low RRF (≤2 ml/min) were independent predictors of mortality. Three-year patient survival was 100, 95, 75, 49, and 0%, and the risk ratio for mortality was 1.0, 6.6, 21.9, and 85.9 in patients with none, one, two, three, and four of these risk factors, respectively. <i>Conclusions:</i> The combination of independent predictors of mortality in PD patients leads to a markedly increasing risk for mortality. Evaluation of a single risk factor underestimates the true impact of risk factors.
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