CONCLUSION: This approach was compared with the mathematical

CONCLUSION: This approach was compared with the mathematical BKM120 molecular weight calculation method and the emission spectrophotometry technique used for practical applications. The results showed this new approach had improved accuracy for determination of the particle number-concentration.

(C) 2010 Society of Chemical Industry”
“Background and objective: The coexistence of chronic obstructive pulmonary disease (COPD) and chronic heart failure (CHF) increases with age. The occurrence, prognosis and therapeutic implications of concurrent COPD in elderly patients with CHF were investigated.

Methods: One hundred and eighteen consecutive patients, >= 65 years old with >= 10 pack/years of

smoking and with a verified diagnosis of CHF in stable condition, were enrolled. They were followed for a mean of 1029 (range 758-1064) days. All patients had spirometry and the diagnosis and classification of COPD were made according to Global Initiative for Chronic Obstructive Lung Disease guidelines.

Results: The mean occurrence of COPD was 30% (90% confidence interval: 24-37%). At baseline in patients with CHF and COPD, there was a shorter 6-min walk distance, lower arterial oxygen tension, glomerular filtration rate and higher N-terminal pro-B-type natriuretic peptide (all P < 0.05). The prescription of CHF therapies, including beta-blockers, was similar in the two groups. After Selleck DAPT follow up, the presence of COPD in patients with CHF did not appear to influence survival.

Conclusions: COPD is relatively frequent in elderly patients

with CHF. COPD did not alter survival.”
“BACKGROUND: This work was carried out to investigate and analyze the interrelated dynamics of mass transport, membrane fouling and flux decline during nanofiltration of tartrazine. A combined application including pore diffusion transport model LOXO-101 solubility dmso and a material balance approach was used to model an experimental flux data obtained from different values of pH (3, 5, 7 and 10), feed-dye concentration (25, 100 and 400 mg L(-1)), and transmembrane pressure (1200, 1800 and 2400 kPa).

RESULTS: Almost 100% dye solution removal and a permeate flux of 135 L m(-2) h(-1) were obtained for 25 mg L(-1) and 1200 kPa at pH 10. At pH 10, lower membrane fouling was obtained due to the increase of electrostatic repulsion between anionic dye molecules and the more negatively charged membrane surface. Flux decline and membrane fouling increased together with transmembrane pressure and dye concentration.

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