327 research outputs found
Corrigendum: The Body Odor Disgust Scale (BODS): Development and validation of a novel olfactory disgust assessment [Chem. Senses, (2016) (1-10)] doi: 10.1093/chemse/bjw107
No full textIn "The Body Odor Disgust Scale (BODS): Development and Validation of a Novel Olfactory Disgust Assessment" by Marco Tullio Liuzza et al., the sentence in section "Confirmatory factor analysis", "One hundred sixty-eight participants (49.6%) defined themselves as female." should be "One hundred twenty-eight participants (49.6%) defined themselves as female.". This has been corrected in print and online. The author regrets this error
Stabilization of a galvanic sludge by means of calcium sulphoaluminate cement
No full text• A solid waste containing heavy metals from galvanic treatment has been stabilized by means of a binding matrix containing ?-2CaO•SiO 2, 4CaO•3Al 2O 3•SO 3 and CaSO 4 able to give calcium silicate and trisulphoaluminate hydrates upon hydration. Experiments have been carried out with mixtures containing up to 60% waste under three different points of view, as follows. The influence of the waste on the technical properties of the stabilized products, the leaching behaviour under four different conditions and the effect of the leaching medium on the binding matrix have been studied
Onset of Mechanical Stability in Random Packings of Frictional Spheres
No full textUsing sedimentation to obtain precisely controlled packings of noncohesive spheres, we find that the volume fraction ?RLP of the loosest mechanically stable packing is in an operational sense well defined by a limit process. This random loose packing volume fraction decreases with decreasing pressure p and increasing interparticle friction coefficient ?. Using x-ray tomography to correct for a container boundary effect that depends on particle size, we find for rough particles in the limit p?0 a new lower bound, ?RLP=0.550±0.001
EURANDOM: a decade of European stochastics
No full textConception, founding, start-up and development of EURANDOM are described by Willem van Zwet, Frank den Hollander (former scientific directors of EURANDOM) and Wim Senden (former managing director of EURANDOM)
A Low or High Physical Activity Level Does Not Modulate Prostate Tumor Tissue Protein Synthesis Rates
No full textHOUBEN L. H. P., T. TUYTTEN, A. M. HOLWERDA, E. WISANTO, J. SENDEN, W. K. W. H. WODZIG, S. W. M. OLDE DAMINK, M. BEELEN, S. BEIJER, K. VAN RENTERGHEM, and L. J. C. VAN LOON. A Low or High Physical Activity Level Does Not Modulate Prostate Tumor Tissue Protein Synthesis Rates. Med. Sci. Sports Exerc., Vol. 56, No. 4, pp. 635- 643, 2024. Introduction: Physical activity level has been identified as an important factor in the development and progression of various types of cancer. In this study, we determined the impact of a low versus high physical activity level on skeletal muscle, healthy prostate, and prostate tumor protein synthesis rates in vivo in prostate cancer patients. Methods: Thirty prostate cancer patients (age, 66 ± 5 yr; body mass index, 27.4 ± 2.9 kg·m −2) were randomized to a low (<4000 steps per day, n = 15) or high (>14,000 steps per day, n = 15) physical activity level for 7 d before their scheduled radical prostatectomy. Daily deuterium oxide administration was combined with the collection of plasma, skeletal muscle, nontumorous prostate, and prostate tumor tissue during the surgical procedure to determine tissue protein synthesis rates throughout the intervention period. Results: Daily step counts averaged 3610 ± 878 and 17,589 ± 4680 steps in patients subjected to the low and high physical activity levels, respectively (P < 0.001). No differences were observed between tissue protein synthesis rates of skeletal muscle, healthy prostate, or prostate tumor between the low (1.47% ± 0.21%, 2.74% ± 0.70%, and 4.76% ± 1.23% per day, respectively) and high (1.42% ± 0.16%, 2.64% ± 0.58%, and 4.72% ± 0.80% per day, respectively) physical activity group (all P > 0.4). Tissue protein synthesis rates were nearly twofold higher in prostate tumor compared with nontumorous prostate tissue. Conclusions: A short-term high or low physical activity level does not modulate prostate or prostate tumor protein synthesis rates in vivo in prostate cancer patients. More studies on the impact of physical activity level on tumor protein synthesis rates and tumor progression are warranted to understand the potential impact of lifestyle interventions in the prevention and treatment of cancer.</p
Metal-Ligand Interactions in Xylem Transport: Behaviour of Cadmium-Citrate Complexes
No full textApplied Science
Disordered spherical bead packs are anisotropic
No full textInvestigating how tightly objects pack space is a long-standing problem, with relevance for many disciplines from discrete mathematics to the theory of glasses. Here we report on the fundamental yet so far overlooked geometric property that disordered mono-disperse spherical bead packs have significant local structural anisotropy manifest in the shape of the free space associated with each bead. Jammed disordered packings from several types of experiments and simulations reveal very similar values of the cell anisotropy, showing a linear decrease with packing fraction. Strong deviations from this trend are observed for unjammed configurations and for partially crystalline packings above 64%. These findings suggest an inherent geometrical reason why, in disordered packings, anisotropic shapes can fill space more efficiently than spheres, and have implications for packing effects in non-spherical liquid crystals, foams and structural glasses
ESC STUDY GROUP OF SPORTS CARDIOLOGY: RECOMMENDATIONS FOR PARTICIPATION IN LEISURE-TIME PHYSICAL ACTIVITY AND COMPETITIVE SPORTS FOR PATIENTS WITH ISCHAEMIC HEART DISEASE.
No full textAn invariant distribution in static granular media
No full textWe have discovered an invariant distribution for local packing configurations in static granular media. This distribution holds in experiments for packing fractions covering most of the range from random loose packed to random close packed, for bead packs prepared both in air and in water. Assuming only that there exist elementary cells in which the system volume is subdivided, we derive from statistical mechanics a distribution that is in accord with the observations. This universal distribution function for granular media is analogous to the Maxwell-Boltzmann distribution for molecular gasses
Antioxidant supplementation and exercise-induced oxidative stress in the 60-year-old as measured by antipyrine hydroxylates
No full textAntioxidant supplementation and exercise-induced oxidative stress in the 60-year-old as measured by antipyrine hydroxylates. Meijer EP, Goris AH, Senden J, van Dongen JL, Bast A, Westerterp KR. Department of Human Biology, Maastricht University, Maastricht, The Netherlands. [email protected] The effects of 12 weeks of antioxidant supplementation on exercise-induced oxidative stress were investigated in older adults (60 (SE 1) years; BMI 26 (SE 1) kg/m(2)). Subjects were randomly divided in two groups: supplementation (n 11) with 100 mg dl-alpha-tocopheryl acetate, 200 mg ascorbic acid, and 2 mg beta-carotene, and placebo (n 9). Before and after the 12 week supplementation period, subjects cycled for 45 min at submaximal intensity (50 % maximal workload capacity). Antipyrine was used as marker for oxidative stress. Antipyrine reacts quickly with hydroxyl radicals to form para- and ortho-hydroxyantipyrine. The latter metabolite is not formed in man through the mono-oxygenase pathway of cytochrome P450. Daily supplementation significantly increased plasma concentrations of alpha-tocopherol and beta-carotene in the supplemented group (Delta 14.4 (SE 3.2) and 0.4 (se 0.1) micromol/l; P<0.001 and P<0.01). No significant differences, within and between groups, were observed in the exercise-induced increase in the ratios para- and ortho-hydroxyantipyrine to antipyrine. In addition, supplementation did not affect the exercise-induced increase in thiobarbituric acid reactive substances in plasma. In conclusion, in 60-year-old subjects antioxidant supplementation had no effect on the exercise-induced increase in oxidative stress as measured by free radical products of antipyrin
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