Prevalence of geriatric syndromes in persons over 65 years: the first results of the EVCALIPT study

Aim. To study the prevalence of geriatric syndromes and assess their relationship with senile asthenia in persons aged ³65 years living in Russian regions with different demographic, climatic and socio-economic characteristics.Material and methods. We examined 664 patients aged 65-107 years (mean age, 79±9 years; men, 25%) living in Moscow (n=365) and Voronezh (n=299). All patients underwent a comprehensive geriatric examination, which consisted of two stages: a survey with original questionnaire and an objective examination.Results. The prevalence of senile asthenia was 66,4%, including 47,4% in people aged 65-74, 71,1% — 75-84 years, and 82,8% — ³85 years (p for trend <0,001). Senile asthenia was associated with age (odds ratio (OR), 2,36; 95% confidence interval (CI), 1,89-2,93; p<0,001) and female sex (OR, 1,52; 95% CI 1,06-2,18; p=0,024). Patients with senile asthenia had a lower socioeconomic status. Also, close associations of senile asthenia with other geriatric syndromes (dementia, depression, vision and hearing impairment, incontinence, falls, high risk of falls, functional decline, failure to thrive) with OR from 1,32 to 7,22 were revealed.Conclusion. The first results of the EVCALIPT study indicate a high incidence of senile asthenia in persons aged ³65 years and its close association with other geriatric syndromes and socio-economic factors

Visualization of structural changes in cellulosic substrates during enzymatic hydrolysis using multimodal nonlinear microscopy

Enzymatic hydrolysis of cellulose provides a renewable source of monosaccharides for production of variety of biochemicals and biopolymers. Unfortunately, the enzymatic hydrolysis of cellulose is often incomplete, and the reasons are not fully understood. We have monitored enzymatic hydrolysis in terms of molecular density, ordering and autofluorescence of cellulose structures in real time using simultaneous CARS, SHG and MPEF microscopy with the aim of contributing to the understanding and optimization of the enzymatic hydrolysis of cellulose. Three cellulose-rich substrates with different supramolecular structures, pulp fibre, acid-treated pulp fibre and Avicel, were studied at microscopic level. The microscopy studies revealed that before enzymatic hydrolysis Avicel had the greatest carbon-hydrogen density, while pulp fibre and acid-treated fibre had similar density. Monitoring of the substrates during enzymatic hydrolysis revealed the double exponential SHG decay for pulp fibre and acid-treated fibre indicating two phases of the process. Acid-treated fibre was hydrolysed most rapidly and the hydrolysis of pulp fibre was spatially non-uniform leading to fractioning of the particles, while the hydrolysis of Avicel was more than an order of magnitude slower than that of both fibres