bluuebunny/crossref_metadata_2025_split huggingface dataset:
Technico‐economical assessment of MFI‐type zeolite membranes for CO2 capture from postcombustion flue gases
Authors: Sublet J. , Pera‐Titus M. , Guilhaume N. , Farrusseng D. , Schrive L. , Chanaud P. , Siret B. , Durécu S. 
Published: October 2011

AbstractA detailed survey of the effect of moisture on the CO2/N2 permeation and separation performance of Mobile Five (MFI) zeolite membranes in view of downstream postcombustion CO2 capture applications in power plants and incinerators is presented. The membranes, displaying a nanocomposite architecture, have been prepared on α‐alumina tubes by pore‐plugging hydrothermal synthesis at 443 K for 89 h using a precursor clear solution with molar composition 1 SiO2:0.45 tetrapropylammonium hydroxide:27.8 H2O. The synthesized membranes present reasonable permeation and CO2/N2 separation properties even in the presence of high water concentrations in the gas stream. A critical discussion is also provided on the technico‐economical feasibility (i.e., CO2 recovery, CO2 purity in the permeate, module volume, and energy consumption) of a membrane cascade unit for CO2 capture and liquefaction/supercritical storage from standard flue gases emitted from an incinerator. Our results suggest that the permeate pressure should be kept under primary vacuum to promote the CO2 driving force within the membrane. © 2011 American Institute of Chemical Engineers AIChE J, 58: 3183–3194, 2012
IBN partition between st monomer/polymer and water and its application in miniemulsion polymerization initiated by AIBN
Authors: Shang Yue , Shan Guo‐Rong 
Published: October 2011

AbstractIsobutyronitrile has been selected as a stable substitute for the 2‐cyano‐2‐propyl radical originating from 2,2′‐azobis(isobutyronitrile) to study the behavior of this radical in miniemulsion polymerization. The partition of isobutyronitrile between styrene monomers/polymers and water has been investigated by carrying out equilibrium experiments under different conditions. Prediction based on a published kinetic model using the newly measured partition coefficient has also been compared with published experimental data and prediction based on the partition coefficient of 2,2′‐azobis(isobutyronitrile). The partition coefficients for isobutyronitrile were found to be 10.98 for the styrene/water system and 4.34 for the polystyrene/water system, respectively. The partition coefficient was found to be unaffected by selected conditions. The model prediction based on the partition coefficient of isobutyronitrile agreed well with the published experimental data, thus, indicating that the partition coefficient of the primary radical should be used in theoretical calculations rather than that of the initiator. © 2011 American Institute of Chemical Engineers AIChE J, 58: 3135–3143, 2012
Ant colony optimization‐based method for managing industrial influents in wastewater systems
Authors: Verdaguer Marta , Clara Narcís , Poch Manel 
Published: October 2011

AbstractThe effectiveness of wastewater systems with high‐industrial effluent input requires avoiding temporary overloads due to influent volumes and/or pollutant loads that exceed the system's treatment capacity. The multiagent paradigm is shown to be a suitable methodology for managing all information related to the state of the entire system to apply optimal influent assignment criteria. However, to be efficient, this methodology requires a prioritization process to assign priorities to different influent classes. A novel approach is proposed for solving this complex issue using a combinatorial optimization procedure with multiple constraints that is implemented when the treatment system lacks the capacity to accept all of its influent. The metaheuristic method applied is an ant colony optimization‐based method, and the solution is achieved using two distinct algorithms with different processes for updating the pheromone trail. The results illustrate their usefulness, even when industrial effluents exhibit large fluctuations in their pollutant concentrations. © 2011 American Institute of Chemical Engineers AIChE J, 58: 3070–3079, 2012
Connexin hemichannel blockade improves outcomes in a model of fetal ischemia
Authors: Davidson Joanne O. , Green Colin R. , B. Nicholson Louise F. , O'Carroll Simon J. , Fraser Mhoyra , Bennet Laura , Jan Gunn Alistair 
Published: October 2011

AbstractObjective:Connexin hemichannels can open during ischemia, resulting in loss of membrane potential, calcium influx, and release of glutamate. In this study, we tested the hypothesis that opening of hemichannels after cerebral ischemia may contribute to delayed evolution of injury.Methods:We infused a mimetic peptide that blocks connexin 43 hemichannels into the lateral ventricle of chronically instrumented fetal sheep in utero at 128 ± 1 days gestation (term is 147 days), starting 90 minutes after 30 minutes of severe ischemia induced by reversible bilateral carotid artery occlusion, for either 1 or 25 hours. Sheep were killed 7 days later.Results:Peptide infusion was associated with a graded improvement in recovery of electroencephalographic power after 7 days recovery, from −13 ± 1.9dB (n = 7) after ischemia–vehicle to −9 ± 1.6dB (n = 7) after ischemia–short infusion and −5 ± 1.6dB after ischemia–long infusion (n = 6, p < 0.05). Peptide infusion was associated with reduced seizure activity after ischemia, less frequent status epilepticus (p < 0.05), and earlier return of sleep state cycling (p < 0.05). Ischemia–long infusion (but not ischemia–short infusion) was associated with improved survival of oligodendrocytes in intragyral and periventricular white matter (p < 0.05) and increased brain weight (p < 0.05). Ischemia–long infusion was associated with an intermediate estimate of surviving neurons in the parasagittal cortex of 2.9 ± 0.8 × 106, in comparison to sham control (4.3 ± 0.9 × 106) or ischemia–vehicle (1.5 ± 0.4 × 106; p < 0.05 vs sham control).Interpretation:These data support the hypothesis that opening of connexin hemichannels is a significant mediator of postischemic white and gray matter dysfunction and injury. ANN NEUROL 2012;71:121–132
Probable rapid eye movement sleep behavior disorder increases risk for mild cognitive impairment and Parkinson disease: A population‐based study
Authors: Boot Brendon P. , Boeve Bradley F. , Roberts Rosebud O. , Ferman Tanis J. , Geda Yonas E. , Pankratz V. Shane , Ivnik Robert J. , Smith Glenn E. , McDade Eric , H. Christianson Teresa J. , Knopman David S. , Tangalos Eric G. , Silber Michael H. , Petersen Ronald C. 
Published: October 2011

AbstractObjective:Rapid eye movement sleep behavior disorder (RBD) is associated with neurodegenerative disease and particularly with the synucleinopathies. Convenience samples involving subjects with idiopathic RBD have suggested an increased risk of incident mild cognitive impairment (MCI), dementia (usually dementia with Lewy bodies), and Parkinson disease (PD). There are no data on such risks in a population‐based sample.Methods:Cognitively normal subjects aged 70 to 89 years in a population‐based study of aging who screened positive for probable RBD using the Mayo Sleep Questionnaire were followed at 15‐month intervals. In a Cox proportional hazards model, we measured the risk of developing MCI, dementia, and PD among the exposed (probable RBD [pRBD]+) and unexposed (pRBD−) cohorts.Results:Forty‐four subjects with pRBD+ status at enrollment (median duration of pRBD features was 7.5 years) and 607 pRBD− subjects were followed prospectively for a median of 3.8 years. Fourteen of the pRBD+ subjects developed MCI, and 1 developed PD (15/44 = 34% developed MCI/PD); none developed dementia. After adjustment for age, sex, education, and medical comorbidity, pRBD+ subjects were at increased risk of MCI/PD (hazard ratio [HR], 2.2; 95% confidence interval [CI], 1.3–3.9; p = 0.005). Inclusion of subjects who withdrew from the study produced similar results, as did exclusion of subjects with medication‐associated RBD. Duration of pRBD symptoms did not predict the development of MCI/PD (HR, 1.05 per 10 years; 95% CI, 0.84–1.3; p = 0.68).Interpretation:In this population‐based cohort study, we observed that pRBD confers a 2.2‐fold increased risk of developing MCI/PD over 4 years. ANN NEUROL 2012;71:49–56
Resolving postoperative neuroinflammation and cognitive decline
Authors: Terrando Niccolò , Eriksson Lars I. , Kyu Ryu Jae , Yang Ting , Monaco Claudia , Feldmann Marc , Jonsson Fagerlund Malin , Charo Israel F. , Akassoglou Katerina , Maze Mervyn 
Published: October 2011

AbstractObjective:Cognitive decline accompanies acute illness and surgery, especially in the elderly. Surgery engages the innate immune system that launches a systemic inflammatory response that, if unchecked, can cause multiple organ dysfunction. We sought to understand the mechanisms whereby the brain is targeted by the inflammatory response and how this can be resolved.Methods:C57BL/6J, Ccr2RFP/+Cx3cr1GFP/+, IkkF/F mice and LysM‐Cre/IkkF/F mice underwent stabilized tibial fracture operation under analgesia and general anesthesia. Separate cohorts of mice were tested for systemic and hippocampal inflammation, integrity of the blood–brain barrier (BBB), and cognition. The putative resolving effects of the cholinergic pathway on these postoperative responses were also studied.Results:Peripheral surgery disrupts the BBB via release of tumor necrosis factor‐alpha (TNFα), which facilitates the migration of macrophages into the hippocampus. Macrophage‐specific deletion of Ikappa B kinase (IKK)β, a central coordinator of TNFα signaling through activation of nuclear factor (NF) κB, prevents BBB disruption and macrophage infiltration in the hippocampus following surgery. Activation of the α7 subtype of nicotinic acetylcholine receptors, an endogenous inflammation‐resolving pathway, prevents TNFα‐induced NF‐κB activation, macrophage migration into the hippocampus, and cognitive decline following surgery.Interpretation:These data reveal the mechanisms for bidirectional communication between the brain and immune system following aseptic trauma. Pivotal molecular mechanisms can be targeted to prevent and/or resolve postoperative neuroinflammation and cognitive decline. ANN NEUROL 2011;70:986–995
Effect of silane treatment on physicochemical properties of lignocellulosic C. indica fiber
Authors: Singha A. S. , Rana Ashvinder K. 
Published: October 2011

AbstractPresent work deals with the mercerization of Cannabis indica fibers and their subsequent surface modification by aminopropyl triethoxysilane. The reaction parameters like time and concentration of the sodium hydroxide for mercerization were optimized. C. indica fibers treated with different silane concentration solutions were subjected to evaluation of some of their properties like swelling behavior in different solvents, moisture absorbance under different humidity levels, and resistance toward chemicals such as sodium hydroxide and hydrochloric acid. C. indica fibers treated with 2% aminopropyl triethoxysilane solution have been found more resistant toward moisture, water, and chemicals when compared with that of untreated fibers. Morphological, structural changes, thermal stability, and crystallinity of both silane treated and mercerized fibers have been studied by SEM, FTIR, TGA, and XRD techniques. Silane treatment has been found to cause decrease in crystallinity but increase in the thermal stability of the fibers. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012
A comparison of new bone formation in patients with ankylosing spondylitis and patients with diffuse idiopathic skeletal hyperostosis: A retrospective cohort study over six years
Authors: Baraliakos X. , Listing J. , Buschmann J. , von der Recke A. , Braun J. 
Published: October 2011

AbstractObjectiveAnkylosing spondylitis (AS) and diffuse idiopathic skeletal hyperostosis (DISH) are both characterized by new bone formation in the spine but presumably have a different pathogenesis. This study was undertaken to compare the natural course of new bone formation in AS and DISH.MethodsLateral radiographs of the cervical and lumbar spine from AS and DISH patients obtained at ≥2 time points within 6 years were analyzed to quantify osteophyte development. Radiographs were scored in a blinded manner by 2 readers using the modified Stoke AS Spine Score (mSASSS). Bone spurs were categorized as having an angle of <45° or >45°.ResultsAS patients (n = 146) were younger than DISH patients (n = 141) (mean ± SD 54.2 ± 12.3 years versus 60.3 ± 7.7 years). Symptom duration (mean ± SD) was 23.6 ± 11.2 years in AS patients and 21.6 ± 12.4 years in DISH patients. The mSASSS at baseline was lower in DISH patients (mean ± SD 14.3 ± 6.7) than in AS patients (20.5 ± 14.5) but had increased by a similar amount at followup (3.3 ± 4.2 versus 4.1 ± 9.5). The mean mSASSS progression rate per year (1.3 units) was also comparable. The mean ± SD number of syndesmophytes per patient was higher in AS (5.7 ± 5.5) than DISH (2.7 ± 2.8) patients (P < 0.001), while degenerative bone spurs (mean ± SD) were more frequent in DISH (1.4 ± 1.8) than AS (1.0 ± 1.4) patients. AS patients developed more new bone spurs with an angle of <45° than >45° per patient (mean ± SD 2.1 ± 2.7 versus 0.6 ± 0.9) (P < 0.001), while similar amounts of both types of bone formation were seen in DISH patients.ConclusionOur findings indicate that the rates of new bone formation in AS and DISH are largely similar. Both groups show osteophyte development, but as expected, syndesmophytes are more frequent in AS patients while DISH patients have more degenerative bone spurs. The nature of the different mechanisms of bone formation needs further study.
Substance P and norepinephrine modulate murine chondrocyte proliferation and apoptosis
Authors: Opolka Alfred , Straub Rainer H. , Pasoldt Anja , Grifka Joachim , Grässel Susanne 
Published: October 2011

AbstractObjectiveSubstance P (SP) and norepinephrine (NE) containing sensory and sympathetic nerve fibers innervate bone and fracture callus. They are involved in controlling vascularization and matrix differentiation during skeletal growth. Both types of nerve fibers are known to modulate growth and metabolic activity of osteoblasts and osteoclasts. The aim of this study was to understand the roles of SP and NE in chondrocyte metabolism and their impact on chondrocyte proliferation, apoptosis, and cell adhesion.MethodsPrimary costal chondrocytes were isolated from newborn mice. Micromass and monolayer cell culture regimens were used to analyze the effects of SP and NE on matrix formation, as determined by quantitative polymerase chain reaction and immunohistochemistry. The effects of SP and NE on proliferation, adhesion, and apoptosis of chondrocytes were determined by enzyme‐linked immunosorbent assay, bromodeoxyuridine, TUNEL, and morphometric analyses.ResultsSP, neurokinin type 1 (NK‐1) receptor, α‐adrenergic receptor (α‐AR), and β‐AR were abundantly expressed in primary costal chondrocytes. Stimulation with SP or NE did not affect extracellular matrix formation with respect to types I, II, and IX collagen and aggrecan in micromass pellets. SP dose‐dependently increased the rate of proliferation of chondrocytes via the NK‐1 receptor, whereas NE decreased the apoptosis rate of chondrocytes by stimulating β‐AR. Both neurotransmitters induced the formation of focal adhesion contacts.ConclusionTransmitters of sympathetic and sensory nerve fibers modulate the metabolic activity of chondrocytes. Endogenous SP, NK‐1 receptor, and adrenoceptor expression in chondrocytes implicates as‐yet‐unknown, presumably trophic, functions of neurotransmitter for skeletal growth and might be of interest for use in cartilage regenerative medicine.
Size and culture as determinants of the web policy of listed firms: The case of web accessibility in Western European countries
Authors: Lorca Pedro , Andrées Javier De , Martínez Ana B. 
Published: October 2011

AbstractWeb accessibility (WA) is an innovation in Web design; it can be considered as part of the corporate social responsibility (CSR) strategy of the firms. As adoption of innovations and CSR commitment are linked with firm size and national culture/legislation, we hypothesize that size and national culture/legislation, may have an effect on WA level. The authors studied an international sample made up of companies included in EUROSTOXX600 (The STOXX Europe 600 Index). The main results suggest that both size and culture have a significant effect on WA. Large firms as well as Anglo‐Saxon companies are more prone to have higher WA levels. A deeper analysis, which was done through the estimation of quantile regression equations, showed that the influence of size is significant for companies trying to excel or for those trying to avoid the worst WA. However, the effect of size is significant only in the lowest part of the conditional distribution.
The inconsistency of the h‐index
Authors: Waltman Ludo , van Eck Nees Jan 
Published: October 2011

AbstractThe h‐index is a popular bibliometric indicator for assessing individual scientists. We criticize the h‐index from a theoretical point of view. We argue that for the purpose of measuring the overall scientific impact of a scientist (or some other unit of analysis), the h‐index behaves in a counterintuitive way. In certain cases, the mechanism used by the h‐index to aggregate publication and citation statistics into a single number leads to inconsistencies in the way in which scientists are ranked. Our conclusion is that the h‐index cannot be considered an appropriate indicator of a scientist's overall scientific impact. Based on recent theoretical insights, we discuss what kind of indicators can be used as an alternative to the h‐index. We pay special attention to the highly cited publications indicator. This indicator has a lot in common with the h‐index, but unlike the h‐index it does not produce inconsistent rankings.
Basic properties of both percentile rank scores and the I3 indicator
Authors: Rousseau Ronald 
Published: October 2011

AbstractWe introduce the notions of congruous indicator of relative performance and congruous indicator of absolute performance. These notions are very similar to the notions of independence and consistency, yet slightly different. It is shown that percentile rank scores, as recently introduced by Leydesdorff, Bornmann, Mutz, and Opthof (2011), are strictly congruous indicators of relative performance, and similarly, that the Integrated Impact Indicator (I3), introduced by Leydesdorff and Bornmann (2011), is a strictly congruous indicator of absolute performance. Our analysis highlights the challenge of finding adequate axioms for ranking and for research evaluation.
Systematic review and meta-analysis of the use of lightweight versus heavyweight mesh in open inguinal hernia repair
Authors: Sajid M S , Leaver C , Baig M K , Sains P 
Published: October 2011

Abstract

Background
The objective of this study was systematically to analyse published randomized trials comparing lightweight mesh (LWM) with heavyweight mesh (HWM) in open inguinal hernia repair.

Methods
Randomized trials on LWM versus HWM were selected from the standard electronic databases. Reported outcomes were analysed systematically using RevMan. Pooled risk ratios were calculated for categorical outcomes, and mean differences for secondary continuous outcomes, using the fixed-effects and random-effects models for meta-analysis.

Results
Nine randomized trials containing 2310 patients were included. There was significant heterogeneity among trials. There was no difference in duration of operation, postoperative pain, recurrence rate, testicular atrophy and time to return to work between LWM and HWM groups. The two mesh types had a similar risk of perioperative complications, but LWM was associated with a reduced risk of developing chronic groin pain (risk ratio (RR) 0·61, 95 per cent confidence interval 0·50 to 0·74) and a reduced risk of developing other groin symptoms, such as stiffness and foreign body sensations (RR 0·64, 0·50 to 0·81).

Conclusion
The use of LWM for open inguinal hernia repair was not associated with an increased risk of hernia recurrence. LWM reduced the incidence of chronic groin pain as well as the risk of developing other groin symptoms. Copyright © 2011 British Journal of Surgery Society Ltd. Published by John Wiley & Sons, Ltd.
Transanal specimen extraction in robotic rectal cancer surgery
Authors: Kang J , Min B S , Hur H , Kim N K , Lee K Y 
Published: October 2011

Abstract

Background
The aim of this study was to identify the benefits of robotic transanal specimen extraction (RTSE) compared with minilaparotomy specimen extraction (MSE).

Methods
Patients who underwent totally robotic surgery with curative intent for treatment of adenocarcinoma of the rectum below 12 cm from the anal verge were selected from the authors' database. Patients were divided into RTSE and MSE groups according to the method of specimen delivery. Clinicopathological features and perioperative surgical outcomes were compared between the two groups.

Results
There were 53 patients in the RTSE group and 66 in the MSE group. No differences were observed in overall complications. Postoperative recovery was faster in the RTSE group in terms of resumption of a soft diet (mean(s.d.) 3·5(1·5) versus 4·6(1·7) days; P &lt; 0·001) and length of hospital stay (9·0(4·8) versus 11·3(5·3) days; P = 0·016). Pain scores on a visual analogue scale were significantly lower in the RTSE group than in the MSE group from day 2 to day 5 after surgery (P = 0·021 to P &lt; 0·001).

Conclusion
RTSE in robotic rectal cancer surgery was associated with less pain and a faster recovery than MSE. Copyright © 2011 British Journal of Surgery Society Ltd. Published by John Wiley & Sons, Ltd.
ChromiumSilicon Multiple Bonds: The Chemistry of Terminal N‐Heterocyclic‐Carbene‐Stabilized Halosilylidyne Ligands
Authors: Filippou Alexander C. , Chernov Oleg , Schnakenburg Gregor 
Published: October 2011

AbstractAn efficient method for the synthesis of the first N‐heterocyclic carbene (NHC)‐stabilized halosilylidyne complexes is reported that starts from SiBr4. In the first step, SiBr4 was treated with one equivalent of the N‐heterocyclic carbene 1,3‐bis[2,6‐bis(isopropyl)phenyl]imidazolidin‐2‐ylidene (SIdipp) to give the 4,5‐dihydroimidazolium salt [SiBr3(SIdipp)]Br (1‐Br), which then was reduced with potassium graphite to afford the silicon(II) dibromide–NHC adduct SiBr2(SIdipp) (2‐Br) in good yields. Heating 2‐Br with Li[CpCr(CO)3] afforded the complex [Cp(CO)2CrSiBr(SIdipp)] (3‐Br) upon elimination of CO. Complex 3‐Br features a trigonal‐planar‐coordinated silicon center and a very short CrSi double bond. Similarly, the reaction of SiCl2(SIdipp) (2‐Cl) with Li[CpCr(CO)3] gave the analogous chloro derivative [Cp(CO)2CrSiCl(SIdipp)] (3‐Cl). Complex 3‐Br undergoes an NHC exchange with 1,3‐dihydro‐4,5‐dimethyl‐1,3‐bis(isopropyl)‐2H‐imidazol‐2‐ylidene (IMe2iPr2) to give the complex [Cp(CO)2CrSiBr(IMe2iPr2)2] (4‐Br). Compound 4‐Br features a distorted‐tetrahedral four‐coordinate silicon center. Bromide abstraction occurs readily from 4‐Br with Li[B(C6F5)4] to give the putative silylidene complex salt [Cp(CO)2CrSi(IMe2iPr2)2][B(C6F5)4], which irreversibly dimerizes by means of an Si‐promoted electrophilic activation of one carbonyl oxygen atom to yield the dinuclear siloxycarbyne complex [Cp(CO)Cr{(μ‐CO)Si(IMe2iPr2)2}2‐ Cr(CO)Cp][B(C6F5)4]2 (5). All compounds were fully characterized, and the molecular structures of 2‐Br–5‐Br were determined by single‐crystal X‐ray diffraction. DFT calculations of 3‐Br and 3‐Cl and their carbene dissociation products [Cp(CO)2CrSiX] (X=Cl, Br) were carried out, and the electronic structures of 3‐Br, 3‐Cl and [Cp(CO)2CrSiX] were analyzed by the natural bond orbital method in combination with natural resonance theory.