Ellen M Druffel
Biographic Data
| ID | 5597410 |
|---|---|
| NAME | Ellen M Druffel |
| GIVEN NAMES | Ellen M |
| FAMILY NAME | Druffel |
| SIGNATURE | DRUFFEL E M |
| VERIFIED | No |
| TOTAL WORKS | 3 |
| TOTAL CITATIONS | 12 |
| WORKS AS AUTHOR | 3 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 1980 |
| LATEST PUBLICATION YEAR | 1983 |
| H-INDEX | 2 |
Time History of Human Gallstones
Bomb-produced 14 C is a valuable tool for studying rates of short-term processes involving carbon cycling. This study shows that bomb 14 C is an excellent tracer of a biochemical process that takes place in the human body, namely the accretion of stones in the gallbladder. The methods developed for obtaining time histories of 14 C/ 12 C and 13 C/ 12 C in concentric layers from a large gallstone (30mm diameter) are reported. Formation times are as…
Long-Term Variability of Temperature and 14 C in the Gulf Stream
Variability in temperature and 14 C levels are recorded in coralline aragonite that grew in the Gulf Stream during the past four centuries. In particular, 18 O/ 16 O ratios reflect a decrease of ca 1°C in surface water temperature during the latter part of the Little Ice age. 14 C levels also rose in the surface waters of the Gulf Stream and in atmospheric CO 2 during the Maunder minimum. These observations indicate that ocean circulation may hav…
Radiocarbon in Annual Coral Rings of Belize and Florida
Radiocarbon measurements on a 109-year-old (1868-1977) core of Montastrea annularis coral from Glover Reef, Belize, in the Gulf of Honduras, reveal uptake of fossil fuel CO 2 and bomb 14 C by surface ocean waters. The history of Δ 14 C values revealed by this Belize growth agree remarkably well with results for coral growth from the Florida Straits. It is concluded that these corals are reliable recorders of 14 C concentrations of dissolved inorg…
Radiocarbon in Annual Coral Rings of Belize and Florida
Radiocarbon measurements on a 109-year-old (1868-1977) core of Montastrea annularis coral from Glover Reef, Belize, in the Gulf of Honduras, reveal uptake of fossil fuel CO 2 and bomb 14 C by surface ocean waters. The history of Δ 14 C values revealed by this Belize growth agree remarkably well with results for coral growth from the Florida Straits. It is concluded that these corals are reliable recorders of 14 C concentrations of dissolved inorg…
Time History of Human Gallstones
Bomb-produced 14 C is a valuable tool for studying rates of short-term processes involving carbon cycling. This study shows that bomb 14 C is an excellent tracer of a biochemical process that takes place in the human body, namely the accretion of stones in the gallbladder. The methods developed for obtaining time histories of 14 C/ 12 C and 13 C/ 12 C in concentric layers from a large gallstone (30mm diameter) are reported. Formation times are as…
Radiocarbon in Annual Coral Rings of Belize and Florida
Radiocarbon measurements on a 109-year-old (1868-1977) core of Montastrea annularis coral from Glover Reef, Belize, in the Gulf of Honduras, reveal uptake of fossil fuel CO 2 and bomb 14 C by surface ocean waters. The history of Δ 14 C values revealed by this Belize growth agree remarkably well with results for coral growth from the Florida Straits. It is concluded that these corals are reliable recorders of 14 C concentrations of dissolved inorg…
Time History of Human Gallstones
Bomb-produced 14 C is a valuable tool for studying rates of short-term processes involving carbon cycling. This study shows that bomb 14 C is an excellent tracer of a biochemical process that takes place in the human body, namely the accretion of stones in the gallbladder. The methods developed for obtaining time histories of 14 C/ 12 C and 13 C/ 12 C in concentric layers from a large gallstone (30mm diameter) are reported. Formation times are as…
Long-Term Variability of Temperature and 14 C in the Gulf Stream
Variability in temperature and 14 C levels are recorded in coralline aragonite that grew in the Gulf Stream during the past four centuries. In particular, 18 O/ 16 O ratios reflect a decrease of ca 1°C in surface water temperature during the latter part of the Little Ice age. 14 C levels also rose in the surface waters of the Gulf Stream and in atmospheric CO 2 during the Maunder minimum. These observations indicate that ocean circulation may hav…
Geology (3 works) · Paleontology (3 works) · Radiocarbon dating (3 works) · Coral and Marine Ecosystems Studies (2 works) · Environmental Science (2 works) · Marine and fisheries research (2 works) · Oceanography (2 works) · Aragonite (1 work) · Archaeology and ancient environmental studies (1 work) · Calcite (1 work)