Temperature effect on carbon biomass in soils from tropical and temperate regions.

Quatro solos de varias origens, (clima tropical e temperado), receberam glucose marcada com "C, na proporcao de 1mgde C.g4 de solos e foram incubados a 15oC e a 35oC com o objetivo de determinar o efeito da temperatura sobre a reciclagem do carbono organico e da biomassa microbiana do solo. O efeito da temperatura na biomassa e na taxa de mineralizacao foi mais evidente a 35oC de incubacao. A 35oC, os solos Woburn e Pegwell, da regiao temperada, apresentaram uma taxa de mineralizacao maior do que a dos solos de Janauba e Capinopolis, de regiao tropical. A taxa de respiracao especifica da biomassa formada pela adicao da glucose e da biomassa antiga demonstrou comportamento diferencial entre solos. A 15oC a reciclagem do carbono foi de 207, 225, 115 e 141 dias para Janauba, Capinopolis, Woburn e Pegwell, respectivamente. A 35oC, foi de 92, 69, 69 e 33 dias para os mesmos solos. O 14C residual foi maior a 35oC. A quantidade de biomassa final a 15oC e a 35oC foi correlacionada com o teor de carbono inicial do solo. Houve uma media de 31 e 8 mg de biomassa C.g4 de carbono organico, respectivamente a 15oC e a 35oC. O teor de carbono inicial foi um fator importante para explicar a taxa de mineralizacao a 35oC

Glueball-glueball scattering in a constituent gluon model

In this work we use a mapping technique to derive in the context of a constituent gluon model an effective Hamiltonian that involves explicit gluon degrees of freedom. We study glueballs with two gluons using the Fock-Tani formalism. In the present work we consider two possibilities for $0^{++}$: (i) as a pure $s\bar{s}$ and calculate, in the context of a quark interchange picture, the cross-section; (ii) as a glueball where a new calculation for this cross-section is made, in the context of the constituent gluon model, with gluon interchange.Comment: Proceedings of the International Workshop IX Hadron Physics and VII Relativistic Aspects of Nuclear Physics (HADRON-RANP 2004

The utility of hyperlactataemia in the definition of septic shock: Evaluating the Sepsis-3 definitions in a sub-Saharan African intensive care unit

Background. Sepsis-3 definitions were published in 2016 and included hyperlactataemia (serum lactate >2.0 mmol/L) as a mandatory component of the new definition of septic shock. These data were collected mainly from high-income countries and lack adequate validation in scenarios outside these countries.Objectives. To evaluate admission serum lactate as a predictor of intensive care unit (ICU) mortality in patients with infection and hypotension requiring inotropic support.Methods. This was a retrospective observational study of 170 patients with infection and hypotension requiring inotropic support admitted to the ICU at King Edward VIII Hospital in Durban, South Africa. Admission serum lactate was evaluated as a predictor of ICU mortality in this cohort.Results. The study population had a median age of only 42 years. The ICU mortality rate for the cohort was 49.4%. Most patients were surgical (71.8%), with the most common source of sepsis being abdominal (55.9%). The ICU mortality rate was 40.9% in patients with a lactate level ≤2.0 mmol/L and 52.4% in those with a level >2.0 mmol/L; this did not reach statistical significance. The optimal cut-off was 4.5 mmol/L, at which there was a clear, statistically significant difference in mortality between patients without (39.3%) and with hyperlactataemia (59.3%) (p=0.009).Conclusions. Hyperlactataemia was associated with increased mortality. However, a lactate level >2.0 mmol/l, as proposed in Sepsis-3, did not reach statistical significance, and a higher cut-off of >4.5 mmol/L was more appropriate

Everything is important: but some things are more important than others

Did you ever wonder why Nestle is so concerned with its image? And why IBM focuses . so much on service (installation, client coaching and after-sales)?-Or why Scandinavian Airlines System puts such a strong emphasis on the punctuality of its flights? In fact, each of these firms focuses on the key success factors (KSF) of their environments that is, they focus on those tasks which must be performed particularly well for an organization to outperform its competition. In the baby food business, a good image is critical for success since it decreases the risk perceived by mothers when buying the product for their children. In the computer business, the client's information processing depends more on service (installation, teaching, repairs) than on things such as hardware and distribution. Scandinavian Airlines which concentrates on the executive segment, has found that punctuality is one of the critical factors for success in such a market segment. It so happens that all these organizations, distinguish between what is more and less important in their competitive settings and focus on the former. Paraphrasing George Orwell they discovered that in the market everything is important but some things are more important than others. In spite of its importance, the empirical evidence of the key success factors has been, up to the present, based upon case-studies and anedoctes. No large survey .has ever been conducted.info:eu-repo/semantics/publishedVersio