XIV. Abstract writing

Information presented in an abstract usually includes a description of

a) the research subject;

b) methods used;

c) results obtained.

Find these components in the abstracts below.

QUANTIFICATION OF EUTROPHICATION

FACTORS IN FLORIDA LAKES

The basic limnology and trophic characteristics of 55 lakes in north and central Florida were investigated. Relationships between lake trophic state and drainage basin conditions were determined by several multi-variate statistical techniques. An index of trophic state based on seven common and quantifiable trophic indicators was developed through the application of principal component analysis. The results obtained indicate that the trophic state index is a function of computed nitrogen and phosphorus loading rates and lake mean depth.

DISTRIBUTION OF EVAPORABLE WATER

IN HARDENED CEMENT PASTE

Distribution of evaporable water in h.c.p. was studied using a simultaneous semi-isothermal method of thermogravimetry. The variations in the amount of each type in response to changes in curing period, relative humidity, and temperature were determined. It was concluded that the evaporable water in h.c.p. is not present solely as physically absorbed water but also as a structural component of some hydrates.

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