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restriction on the trigeminal ganglion: a morphometric study. Mech. Ageing Dev. 65 , 111-125. Effects of aging and food restriction on the trigeminal ganglion: a morphometric study Mech. Ageing Dev
thinned uneven-aged and clear-cut spruce stands. Ann. Zool. Fenn. 39:131-149. Boreal carabid-beetle (Coleoptera, Carabidae) assemblages in thinned uneven-aged and clear-cut spruce stands Ann. Zool
. Clin. Transl. Oncol., 2012, 14 (6), 458–464. Shafique, K., Morrison, D. S.: Socio-economic inequalities in survival of patients with prostate cancer: role of age and Gleason grade at diagnosis. PLoS One, 2013, 8
the Fetal Medicine Foundation First Trimester Screening Group: UK multicentre project on assessment of risk of trisomy 21 by maternal age and fetal nuchal-translucency thickness at 10–14 weeks of gestation. Lancet, 1998, 352 , 343
Abstract
A dredged sludge was studied to investigate the influence of ageing and of pretreatment on its drying rate, water sorption/retention, thermal mass loss, XRD and microstructure (SEM).
Ageing caused change in particle thickness and specific surface, a gradual aggregation to form units of the size 10–50 μm, formation of macropores of similar size, unhomogeneity and fissures between aggregates and “super-aggregates”. Macropores were detectable by the initial drying rate especially at 45°C. They indicated a tendency of collapsing at a lower drying rate at 30°C. This is consistent with SEM observations. With ageing the aggregates were more compact and less sensitive to drying.
The aggregated system indicated a higher initial drying rate (higher permeability), whereas stirring induced a lower drying rate, favouring the formation of compact laminar structure.
XRD peak intensity was lowered with ageing due to decrease in crystallinity (stacking faults and/or decrease in crystallite size). The content of amorphous material was lowered as well, reducing water sorption/desorption, which indicated that the specific surface is lower.
From the suitable microstructure induced by ageing some new phases may form (feldspar, zeolites), preferably in the coarser fraction of the sludge. This is disturbed by stirring which operation expels also carbonates from the particle edges and this may reduce the structural strength of the sludge. In aged bentonite suspension a similar tendency was observed of formation of specific microstructures capable of phase transformation, e.g. to feldspar.
Abstract
Age effects in scientific production are a consolidated stylised fact in the literature. At the level of scientist productivity declines with age following a predictable pattern. The problem of the impact of age structure on scientific productivity at the level of institutes is much less explored. The paper examines evidence from the Italian National Research Council. The path of hiring of junior researchers along the history of the institution is reconstructed. We find that age structure has a depressing effect on productivity and derive policy implications. The dynamics of growth of research institutes is introduced as a promising research field.
Abstract
In the 'normal' ageing brain a decrease in the cerebral metabolic rate has been determined across many brain regions. This study determines whether age differences would affect metabolic rates in regions and different hemispheres of the brain. The regional metabolic rate of glucose (rCMRGlu) was examined in a group of 72 subjects, ages 22 to 82 years, with 36 regions of interest chosen from both hemispheres of the cortex, midbrain and cerebellum. To determine metabolic rates the in-vivo technique of positron emission tomography (PET) was employed. Three age groups were chosen to compare hemispherical differences. In both young and intermediate age groups the left hemisphere had higher rCMRGlu values than those of the right for the majority of regions with, although less pronounced in the intermediate group. Importantly, the older age group displayed little difference between hemispheres.
prevalence of PG among men and women, and younger and older persons. Young adults aged 18–35 years are known to be more susceptible to PG, with a markedly higher risk among young men compared to their female counterparts ( Abbot et al., 2004 ; Gotestam
Introduction This study investigated age-related variations in school satisfaction and explored the mediating role of school engagement. Considering the significant amount of time children and adolescents spend in school, environment is a key marker
Introduction Populations around the world are aging rapidly as life expectancy increases and fertility decreases. The number of people above 90 is expected to reach 30 million by 2030 [ 1 ]. In addition, the probability of cardiac arrest increases
