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Highly stable core–shell Pt-CeO2 nanoparticles electrochemically deposited onto Fecralloy foam reactors for the catalytic oxidation of CO. J IND ENG CHEM 2018. [DOI: 10.1016/j.jiec.2018.06.007] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Ni or Ru supported on MgO/γ-Al2O3 pellets for the catalytic conversion of ethanol into butanol. RSC Adv 2018; 8:25846-25855. [PMID: 35539807 PMCID: PMC9082572 DOI: 10.1039/c8ra04310h] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/21/2018] [Accepted: 07/10/2018] [Indexed: 01/16/2023] Open
Abstract
Ni- and Ru-based catalytic pellets supported on commercial γ-Al2O3 pellets modified with magnesium oxide have been prepared for application in the catalytic conversion of ethanol into butanol. MgO/γ-Al2O3 pellets with or without added metals have been characterized by XRD, SEM/EDX, TGA, N2 physisorption, H2 TPR, and CO2 TPD in order to investigate the effect of MgO coverage and metal distribution on the surface and red-ox properties of the materials and, in turn, their effects on the catalytic performance. The conversion of ethanol into butanol has been investigated in a continuous flow reactor at 350–400 °C under diluted conditions (3% ethanol) in order to rank the different catalytic pellets and identify the best formulations and preparation procedures via a comparison with powder catalysts previously proposed in the literature with similar compositions. Results show enhanced catalytic performance for MgO-covered alumina pellets with respect to a pure MgO powder catalyst in spite of the lower MgO load. A significant further positive effect is found when Ni or Ru enters a solid solution with MgO. Ni- and Ru-based catalytic pellets supported on commercial γ-Al2O3 pellets modified with magnesium oxide have been prepared for application in the catalytic conversion of ethanol into butanol.![]()
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Femoral neck shaft angle width is associated with hip-fracture risk in males but not independently of femoral neck bone density. Br J Radiol 2014; 87:20130358. [PMID: 24678889 DOI: 10.1259/bjr.20130358] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/13/2022] Open
Abstract
OBJECTIVE To investigate the specificity of the neck shaft angle (NSA) to predict hip fracture in males. METHODS We consecutively studied 228 males without fracture and 38 with hip fracture. A further 49 males with spine fracture were studied to evaluate the specificity of NSA for hip-fracture prediction. Femoral neck (FN) bone mineral density (FN-BMD), NSA, hip axis length and FN diameter (FND) were measured in each subject by dual X-ray absorptiometry. Between-mean differences in the studied variables were tested by the unpaired t-test. The ability of NSA to predict hip fracture was tested by logistic regression. RESULTS Compared with controls, FN-BMD (p < 0.01) was significantly lower in both groups of males with fractures, whereas FND (p < 0.01) and NSA (p = 0.05) were higher only in the hip-fracture group. A significant inverse correlation (p < 0.01) was found between NSA and FN-BMD. By age-, height- and weight-corrected logistic regression, none of the tested geometric parameters, separately considered from FN-BMD, entered the best model to predict spine fracture, whereas NSA (p < 0.03) predicted hip fracture together with age (p < 0.001). When forced into the regression, FN-BMD (p < 0.001) became the only fracture predictor to enter the best model to predict both fracture types. CONCLUSION NSA is associated with hip-fracture risk in males but is not independent of FN-BMD. ADVANCES IN KNOWLEDGE The lack of ability of NSA to predict hip fracture in males independent of FN-BMD should depend on its inverse correlation with FN-BMD by capturing, as the strongest fracture predictor, some of the effects of NSA on the hip fracture. Conversely, NSA in females does not correlate with FN-BMD but independently predicts hip fractures.
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Disproportionation of associated Cu2+ sites in Cu-ZSM-5 to Cu+ and Cu3+ and FTIR detection of Cu3+(NO)x (x=1, 2) species. J Catal 2014. [DOI: 10.1016/j.jcat.2013.10.018] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Extracorporeal dialysis: techniques and adequacy. Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.37] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
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Epidemiology & outcome in CKD 5D (2). Clin Kidney J 2011. [DOI: 10.1093/ndtplus/4.s2.58] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
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The Effect of Support on Sulphur Tolerance of Rh Based Catalysts for Methane Partial Oxidation. Catal Letters 2008. [DOI: 10.1007/s10562-008-9657-4] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Enhancement of hydrothermal stability of Cu-ZSM5 catalyst for NO decomposition. KINETICS AND CATALYSIS 2006. [DOI: 10.1134/s0023158406050119] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Development of a dual functional structured catalyst for partial oxidation of methane to syngas. Catal Today 2005. [DOI: 10.1016/j.cattod.2005.06.058] [Citation(s) in RCA: 39] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
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Oxidation of propane to acrylic acid over vanadyl pyrophosphate: modifications of the structural and acid properties during the precursor activation and their relationship with catalytic performances. ACTA ACUST UNITED AC 2004. [DOI: 10.1016/j.molcata.2004.08.005] [Citation(s) in RCA: 29] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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Effect of the support on the surface composition of vanadium phosphate catalysts in the oxidative dehydrogenation of ethane. SURF INTERFACE ANAL 2004. [DOI: 10.1002/sia.1751] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
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Effect of the preparation technique on the catalytic performances of TiO2 supported vanadium phosphate in the oxidative dehydrogenation of ethane. Catal Today 2004. [DOI: 10.1016/j.cattod.2004.03.042] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Vanadyl phosphate dihydrate supported on oxides for the catalytic conversion of ethane to ethylene. ACTA ACUST UNITED AC 2003. [DOI: 10.1016/s1381-1169(03)00344-3] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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GR. C E G NELLA FREQUENZA DI ISOLAMENTO DI STREP. B.EMOL. DI T. FARINGEO DI PAZ.AFFERENTI AL LAB.ANALISI FASANO (BR). MICROBIOLOGIA MEDICA 2003. [DOI: 10.4081/mm.2003.4417] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
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Brucella spondylitis with paravertebral abscess due to Brucella melitensis infection: a case report. DRUGS UNDER EXPERIMENTAL AND CLINICAL RESEARCH 2003; 28:95-8. [PMID: 12224383] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/26/2023]
Abstract
This report describes the case of a 45-year-old woman with a 5-month history of fever, generalized malaise, myalgia, lower back pain and difficulty in walking. Serodiagnosis for brucella, carried out at the onset of symptoms 5 months previously, was negative. When the patient was admitted to our hospital there was contracture of the paraspinal muscles but no peripheral nerve damage. Laboratory tests showed positive agglutination for Brucella and an increase in the rate of dilution from 1/160 to 1/640 over 2 weeks. Radiographs and a computed tomography scan of the spine revealed bone erosion in the posterior borders of the L4-L5 vertebral end plates and a soft tissue mass surrounding the interposed disc and protruding into the spinal canal. Magnetic resonance imaging confirmed the presence of a paraspinal abscess around the affected disc and tissue edema. Culture tests of the blood and abscess tissue, taken by biopsy, were negative. Rifampicin treatment (600 mg daily), combined with a bust cast to immobilize the spine, led to clinical healing without the need for surgery. Because onset symptoms are nonspecific and insidious, in nonrisk subjects a diagnosis of brucellosis may sometimes be suspected only if there are local symptoms. The phenomenon of the absence of positivity in patients with a high antibody titer should also be considered Cases such as that described herein demonstrate the need for culture tests and serodiagnosis, even in nonrisk patients with persistent fever and arthralgia, to prevent the later complications of brucellosis.
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Effect of water on the catalytic behaviour of VPO in the selective oxidation of propane to acrylic acid. Chem Commun (Camb) 2003:492-3. [PMID: 12638965 DOI: 10.1039/b211619g] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
The role of water in propane oxidation to acrylic acid is associated to slow structural modifications of VPO enhancing catalytic performances.
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Efficacy of a novel PEGylated humanized anti-TNF fragment (CDP870) in patients with rheumatoid arthritis: a phase II double-blinded, randomized, dose-escalating trial. Rheumatology (Oxford) 2002; 41:1133-7. [PMID: 12364632 DOI: 10.1093/rheumatology/41.10.1133] [Citation(s) in RCA: 145] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
OBJECTIVE Biological products that neutralize tumour necrosis factor alpha (TNF-alpha) are beneficial in rheumatoid arthritis (RA). We studied the effects of CDP870, a novel anti-TNF-alpha antibody fragment modified to obtain a prolonged plasma half-life ( approximately 14 days). METHODS Thirty-six patients were randomized in a double-blind, ascending-dose group study to a single intravenous infusion of placebo (n = 12) or 1, 5 or 20 mg/kg CDP870 (each n = 8). The patients were predominantly female (30/36), had a mean age of 56 yr and a mean duration of RA of 13 years. They had received a mean of five DMARDs or experimental therapies (with 1 month washout before the study started) and had active disease. Continuation of NSAIDs and up to 7.5 mg prednisolone daily was allowed. Following the blinded dosing period, 32 patients received a single open-label infusion of either 5 or 20 mg/kg CDP870. RESULTS In the blinded dosing period, 6/12 placebo patients withdrew from the study (for deteriorating RA < or =4 weeks after dosing). Two of 24 CDP870-treated patients withdrew, both in the 1 mg/kg group (for deteriorating RA or lost to follow up >4 weeks after dosing). The proportion of patients with ACR20 improvement for the per-protocol population with the last observation carried forward was 16.7, 50, 87.5 and 62.5% after 0, 1, 5 and 20 mg/kg CDP870 respectively (combined treatment effect, P = 0.012, primary analysis) at 4 weeks and 16.7, 25, 75 and 75% (P = 0.032) at 8 weeks. The proportion of patients with ACR50 improvement for the per-protocol population with the last observation carried forward was 0, 12.5, 12.5 and 50% after 0, 1, 5 and 20 mg/kg CDP870 respectively (combined treatment effect, P = 0.079) at 4 weeks and 0, 12.5, 12.5 and 50% (P = 0.079) at 8 weeks. Following the open-label dose of CDP870, similar beneficial effects were achieved. CONCLUSION CDP870 is effective, was very well tolerated in this small study, and has an extended duration of action following one or more intravenous doses.
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Proximal femur geometry to detect and distinguish femoral neck fractures from trochanteric fractures in postmenopausal women. Osteoporos Int 2002; 13:69-73. [PMID: 11878458 DOI: 10.1007/s198-002-8340-2] [Citation(s) in RCA: 109] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Abstract
Some proximal femur geometry (PFG) parameters, measured by dual-energy X-ray absorptiometry (DXA), have been reported to discriminate subjects with hip fracture. Relatively few studies have tested their ability to discriminate femoral neck fractures from those of the trochanter. To this end we performed a cross-sectional study in a population of 547 menopausal women over 69 years of age with femoral neck fractures (n = 88), trochanteric fractures (n = 93) or controls (n = 366). Hip axis length (HAL), neck-shaft angle (NSA), femoral neck diameter (FND) and femoral shaft diameter (FSD) were measured by DXA, as well as the bone mineral density (BMD) of the nonfractured hip at the femoral neck, trochanter and Ward's triangle. In fractured subjects, BMD was lower at each measurement site. HAL was longer and NSA wider in those with femoral neck fractures. With logistic regression the age-adjusted odds ratio (OR) for a 1 standard deviation (SD) decrease in BMD was significantly associated at each measurement site with femoral neck fracture (femoral neck BMD: OR 1.9, 95% confidence interval (95% CI): 1.4-2.5; trochanter BMD: OR 1.6, 95% CI 1.2-2.0; Ward's triangle BMD: OR 1.7, 95% CI 1.3-2.2) and trochanteric fracture (femoral neck BMD: OR 2.6, 95% CI 1.9-3.6; trochanter BMD: OR 3.0, 95% CI 2.2-4.1; Ward's triangle BMD: OR 1.8, 95% CI 1.4-2.3). Age-adjusted OR for 1 SD increases in NSA (OR 2.2, 95% CI 1.7-2.8) and HAL (OR 1.3, 95% CI 1.1-1.6) was significantly associated with the fracture risk only for femoral neck fracture. In the best predictive model the strongest predictors were site-matched BMD for both fracture types and NSA for neck fracture. Trochanteric BMD had the greatest area (0.78, standard error (SE) 0.02) under the receiver operating characteristic curve in trochanteric fractures, whereas for NSA (0.72, SE 0.03) this area was greatest in femoral neck fractures. These results confirm the association of BMD with proximal femur fracture and support the evidence that PFG plays a significant role only in neck fracture prediction, since NSA is the best predictive parameter among those tested.
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Effect of intramuscular clodronate on bone mass and metabolism in osteoporotic women. INTERNATIONAL JOURNAL OF TISSUE REACTIONS 2001; 23:33-7. [PMID: 11392061] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
Abstract
Bisphosphonates have significantly improved the treatment of postmenopausal osteoporosis. However, when administered orally, gastric intolerance is their main adverse effect. This makes patients reluctant to undergo treatment. As an alternative, intramuscular (i.m.) administration may be more acceptable to patients undergoing long-term treatment. Since clodronate has been easily available in Italy for many years, we carried out this study to evaluate its effect on bone mineral density (BMD) in 36 osteoporotic postmenopausal women who were intolerant to oral administration of bisphosphonates. Patients received 100 mg of clodronate i.m. every 10 days together with 500 mg/day of calcium orally for 2 years. A control group of 32 women received only oral calcium at the same dose and for the same length of time. In the control group a progressive but not statistically significant decrease in BMD was observed in the spine and femoral neck over the 2-year follow-up. In contrast, patients treated with clodronate had a statistically significant increase in BMD in the spine at the first yearly check-up (+2.63%) and a further but not statistically significant increase during the second year of treatment (+0.59%). The increase in BMD at the femoral neck was not statistically significant during the first and second years of treatment, being 1.21% and 0.37% respectively. In the women treated with clodronate, hydroxyproline was significantly suppressed. All the patients reported local pain at the injection site. This led 11.11% of the subjects to withdraw from treatment.
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Bone mineral density and bone loss measured at the radius to predict the risk of nonspinal osteoporotic fracture. J Bone Miner Res 2001; 16:1130-5. [PMID: 11393790 DOI: 10.1359/jbmr.2001.16.6.1130] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
Abstract
Low bone mineral density (BMD) and, probably, the rate of bone loss (RBL) are associated with the risk of osteoporotic fractures. To estimate the risk of nonspinal fracture in osteoporotic women, we measured BMD and RBL in a prospective study (average follow-up, 5.38 years) in 656 postmenopausal women. The women were considered in three groups: group A (whole population), group B (women under the age of 65 years) and group C (women over the age of 65 years). At the beginning of the study, BMD was measured at the distal radius (DR) and at the proximal radius (PR) using a single-energy densitometer. BMD measurements made 2 years previously in the same patients were used to calculate RBL. Then patients were checked annually for nonspine fracture due to minor trauma. During follow-up, 121 nonspinal fractures were detected. Women with fractures were older and had lower BMD. With the Cox regression, age-corrected BMD at both DR and PR predicts fracture risk in groups A and B but not in group C. After correction for potential confounders, DR still predicts fractures in groups A and B whereas PR predicts fractures only in group B. In group C, only the RBL at the PR was predictive of the fracture risk as well as in the other two groups. Specific types of fractures are predictable in the whole population at the wrist. In conclusion, radial BMD predicts the risk of nonspine fractures except in women over the age of 65 years. The RBL at the PR is an effective predictor of fracture risk also in women over the age of 65 years.
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Comparison of behaviour of rare earth containing catalysts in the oxidative dehydrogenation of ethane. Catal Today 2000. [DOI: 10.1016/s0920-5861(00)00391-6] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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[Guidelines on intestinal dysmicrobism (SIBO Small Intestine Bacterial Overgrowth)]. MINERVA GASTROENTERO 1999; 45:297-308. [PMID: 16498342] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/06/2023]
Abstract
Bacterial flora consisting of Gram-positive and Gram-negative germs, aerobes and anaerobes, is distributed along the digestive tract in varying quantities from zero to a maximum of 10(12)/ml of endoluminal aspirate. This bacterial ecosystem counterbalances with the ecological niche of the host organism and harmonizes with the various digestive, secretory, motor, absorption and sensitivity functions of the entire intestine. This dynamic equilibrium between environment, bacterial flora and host may be interrupted due to a variety of complex reasons, leading to quantitative and qualitative modifications of the normal intestinal microbial flora that can cause Small Intestinal Bacterial Overgrowth (SIBO). SIBO is thus due to an invasion of the small intestine, from the upper part, by pathogenic strains of oro-alimentary origin, and from the lower part by colo-fecal germs through an incontinent Bauhin's valve. These germs alter the normal intestinal functions and give rise to a form of diarrhoea in which the characteristics of malabsorption prevail, with all the inherent diagnostic problems. The diagnostic gold standard is the culture of the duodenal-jejunal aspirate which, being difficult to perform and providing unreliable results, is not easily included in the daily clinical routine. Indirect tests include the breath test, which is widely accepted by patients but burdened by diagnostic doubts on the part of medical personnel. Diagnostic confirmation is therefore greatly conditioned by clinical subjectivity and objectivity, as well as by the response to medical therapy. In cases of declared malabsorption, medical therapy is necessary by means of appropriate diet, prebiotics, probiotics and antibiotics. The difficulty in identifying the specific bacterial population and the part of the digestive tract that is affected indicate the appropriateness of a broad-spectrum antibiotic therapy, capable of eradicating aerobes and anaerobes, preferably with a topical rather than a general action, frequently cause of undesired effects.
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Catalytic combustion of methane over LaMnO3 perovskite supported on La2O3 stabilized alumina. A comparative study with Mn3O4, Mn3O4-Al2O3 spinel oxides. ACTA ACUST UNITED AC 1998. [DOI: 10.1016/s0082-0784(98)80079-9] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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