171 research outputs found
Evaluation of biodegradation kinetic constants for aromatic compounds by means of aerobic batch experiments
No full textKinetics of aerobic biodegradation have been investigated for twenty aromatic species using sludges collected from the aeration basin of municipal sewage treatment plants. The reproducibility of the results is tested with respect to the sludges period of collection and the wastewater treatment plant where they are taken. The comparison of kinetic constants, estimated for the investigated chemicals, allows to evaluate the reactivity effect of single groups (i.e., -OH, -CH3, -Cl, -NO2) into the aromatic structures. The search for easy structure-reactivity relationships is also attempted by means of contributing group methods
Estimation of Biodegradation Kinetic Constants for Aromatic Derivates Through Aerobic Batch Experiments
No full textKinetics of aerobic biodegradation are studied for 20 aromatic species by using sludges taken from a municipal sewage treatment plant. The reproducibility of the results is tested with respect to the period of collection of the sludges and the wastewater treatment plant were they are taken. The comparison of kinetic constants estimated for investigated chemicals allows to evaluate the effect on the reactivity due to the presence of single groups (i.e., -OH, -CH3, -Cl, -NO2) into the aromatic structures. The search for easy structure-reactivity relationships is also attempted by using some group contributing methods
F. Pirozzi, Da "Nella città dell’istante mutevole" a "Cimitilænd." Il percorso di esplorazione di Raffaele Marone nella filosofia del cambiamento
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Worldwide burden of colorectal cancer: a review
No full textColorectal cancer is a major public health problem, being the third most commonly diagnosed cancer and the fourth cause of cancer death worldwide. There is wide variation over time among the different geographic areas due to variable exposure to risk factors, introduction and uptake of screening as well as access to appropriate treatment services. Indeed, a large proportion of the disparities may be attributed to socioeconomic status. Although colorectal cancer continues to be a disease of the developed world, incidence rates have been rising in developing countries. Moreover, the global burden is expected to further increase due to the growth and aging of the population and because of the adoption of westernized behaviors and lifestyle. Colorectal cancer screening has been proven to greatly reduce mortality rates that have declined in many longstanding as well as newly economically developed countries. Statistics on colorectal cancer occurrence are essential to develop targeted strategies that could alleviate the burden of the disease. The aim of this paper is to provide a review of incidence, mortality and survival rates for colorectal cancer as well as their geographic variations and temporal trends
Primi risultati sulla trattabilità biologica di sedimenti marini della laguna di Venezia contaminati da IPA e olii minerali
No full textPrimi risultati sulla trattabilità biologica di sedimenti marini della laguna di Venezia contaminati da IPA e olii minerali
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