Accumulated degree days

Megyesi, M. S., Nawrocki, S. P., and Haskell, N. H. (2005). Using accumulated degree-days to estimate the postmortem interval from decomposed human remains. /. Forensic Sci. 50, 618-626. 

Biggs A R 1986 Prediction of lignin and suberin deposition in boundary zone tissue of wounded tree bark using accumulated degree days. J Amer Soc Hort Sci 111 757-760... 

To a large extent, temperature regulates pest development. Scientists use units of measurements called degree days to track heat accumulation over time and predict the local appearance of various pests. The degree day formula assigns a value to each day s maximum and minimum temperature and com-... 

The submodel predicting the risk of damage to forest vegetation from SO2 gas in the ambient air is based upon a dose-response relationship observed in the Erzegebirge region of Czechoslovakia (Makela and Schopp, 1990). An accumulated dose of mean annual SO2 concentration (calculated by the RAINS atmospheric transport submodel) is compared to a critical dose which in turn depends upon factors such as growing degree days. 

Nevertheless, chemists have been planning their reactions for more than a century now, and each day they run hundreds of thousands of reactions with high degrees of selectivity and yield. The secret to success lies in the fact that chemists can build on a vast body of experience accumulated over more than a hundred years of performing millions of chemical reactions under carefully controlled conditions. Series of experiments were analyzed for the essential features determining the course of a reaction, and models were built to order the observations into a conceptual framework that could be used to make predictions by analogy. Furthermore, careful experiments were planned to analyze the individual steps of a reaction so as to elucidate its mechanism. 

The degree of nitrification did not increase linearly with residence time, but was more of a step change. The accumulation of nitrified oxygen (N02 +N03 ) was described by a logistic growth curve (20), in the range of residence times 2.1 to 4.1 days ... 

Use in patients with impaired renal function - Perindoprilat elimination is decreased in renally impaired patients, with a marked increase in accumulation when Ccr drops below 30 mL/min. In patients with Ccr less than 30 mL/min, safety and efficacy have not been established. For patients with lesser degrees of impairment (Ccr more than 30 mL/min), the initial dosage should be 2 mg/day, and dosage should not exceed 8 mg/day because of limited clinical experience. During dialysis, perindopril is removed with the same clearance as in patients with normal renal function. 

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