Diane M. McKnight

TL;DR: In this article, the authors studied the fluorescence properties of fulvic acids isolated from streams and rivers receiving predominantly terrestrial sources of organic material and from lakes with microbial sources, and showed that the ratio of the emission intensity at a wavelength of 450 nm to that at 500 nm, obtained with an excitation of 370 nm, can serve as a simple index to distinguish sources of isolated aquatic fulvic acid.

TL;DR: The role of lakes in carbon cycling and global climate, examine the mechanisms influencing carbon pools and transformations in lakes, and discuss how the metabolism of carbon in the inland waters is likely to change in response to climate.

TL;DR: Results provide new insight into the redox reactivity of DOM and have implications for the application of fluorescence spectroscopy as a tool to characterize DOM.

TL;DR: In this article, the authors conclude that over half of accessible fresh runoff globally is already appropriated for human use, and that more than 1 × 109 people currently lack access to clean drinking water and almost 3 ×109 people lack basic sanitation services, and because the human population will grow faster than increases in the amount of available fresh water, per capita availability of fresh water will decrease in the coming century.

TL;DR: In this paper, a method was developed for the isolation of hydrophilic organic acids from aquatic environments using Amberlite ∗ XAD-4 resins in series using a two column array of XAD 8 and XAD 4 resins.