H A Takahashi
Biographic Data
| ID | 5598215 |
|---|---|
| NAME | H A Takahashi |
| GIVEN NAMES | H A |
| FAMILY NAME | Takahashi |
| SIGNATURE | TAKAHASHI H A |
| VERIFIED | No |
| TOTAL WORKS | 3 |
| TOTAL CITATIONS | 4 |
| WORKS AS AUTHOR | 3 |
| WORKS AS EDITOR | 0 |
| FIRST PUBLICATION YEAR | 2001 |
| LATEST PUBLICATION YEAR | 2019 |
| H-INDEX | 2 |
A Suitable procedure for preparing of water Samples used in Radiocarbon Intercomparison
We studied a suitable procedure for preparing of water samples used in radiocarbon intercomparisons involving dissolved inorganic carbon (DIC). The water samples must have inter-batch consistency and stable 14 C concentrations and no sterilizing agent (e.g., HgCl 2 ) should be added, in order to avoid the production of hazardous material. Six water samples, containing widely different amounts and types of salts, DIC, and 14 C concentrations (1–10…
Radiocarbon Dating of Groundwater in Granite Fractures in Abukuma Province, Northeast Japan
Knowledge of the groundwater age is indispensable for understanding groundwater flow in crystalline rocks. The present study is the first to discuss the radiocarbon ages of groundwater in Abukuma granite, Fukushima Prefecture, northeast Japan. The vertical profiles of 14 C dates and δ 13 C are obtained from 3 boreholes (depths of 140, 230, and 306 m). Chemical and carbon isotopic compositions suggest that dead-carbon contamination of groundwater …
Paleoenvironment in Dae-Am San High Moor in the Korean Peninsula
We discuss paleoenvironmental changes at the Dae-Am San high moor, located near the Demilitarized Zone at 38°N. This area has been reported to be the only high moor in the Korean peninsula. The 14 C age of the bottom sediment (75–80 cm in depth) at this site is about 1900 BP. Since the radiocarbon ages for the intervals at 50–55 cm and 75–80 cm were almost the same, we conclude that the deep layers (55–80 cm) in the high moor were all part of the…
A Suitable procedure for preparing of water Samples used in Radiocarbon Intercomparison
We studied a suitable procedure for preparing of water samples used in radiocarbon intercomparisons involving dissolved inorganic carbon (DIC). The water samples must have inter-batch consistency and stable 14 C concentrations and no sterilizing agent (e.g., HgCl 2 ) should be added, in order to avoid the production of hazardous material. Six water samples, containing widely different amounts and types of salts, DIC, and 14 C concentrations (1–10…
Radiocarbon Dating of Groundwater in Granite Fractures in Abukuma Province, Northeast Japan
Knowledge of the groundwater age is indispensable for understanding groundwater flow in crystalline rocks. The present study is the first to discuss the radiocarbon ages of groundwater in Abukuma granite, Fukushima Prefecture, northeast Japan. The vertical profiles of 14 C dates and δ 13 C are obtained from 3 boreholes (depths of 140, 230, and 306 m). Chemical and carbon isotopic compositions suggest that dead-carbon contamination of groundwater …
Paleoenvironment in Dae-Am San High Moor in the Korean Peninsula
We discuss paleoenvironmental changes at the Dae-Am San high moor, located near the Demilitarized Zone at 38°N. This area has been reported to be the only high moor in the Korean peninsula. The 14 C age of the bottom sediment (75–80 cm in depth) at this site is about 1900 BP. Since the radiocarbon ages for the intervals at 50–55 cm and 75–80 cm were almost the same, we conclude that the deep layers (55–80 cm) in the high moor were all part of the…
Radiocarbon Dating of Groundwater in Granite Fractures in Abukuma Province, Northeast Japan
Knowledge of the groundwater age is indispensable for understanding groundwater flow in crystalline rocks. The present study is the first to discuss the radiocarbon ages of groundwater in Abukuma granite, Fukushima Prefecture, northeast Japan. The vertical profiles of 14 C dates and δ 13 C are obtained from 3 boreholes (depths of 140, 230, and 306 m). Chemical and carbon isotopic compositions suggest that dead-carbon contamination of groundwater …
A Suitable procedure for preparing of water Samples used in Radiocarbon Intercomparison
We studied a suitable procedure for preparing of water samples used in radiocarbon intercomparisons involving dissolved inorganic carbon (DIC). The water samples must have inter-batch consistency and stable 14 C concentrations and no sterilizing agent (e.g., HgCl 2 ) should be added, in order to avoid the production of hazardous material. Six water samples, containing widely different amounts and types of salts, DIC, and 14 C concentrations (1–10…
Environmental Chemistry (3 works) · Geology (3 works) · Radiocarbon dating (3 works) · Geology and Paleoclimatology Research (2 works) · Geomorphology (2 works) · Isotope Analysis in Ecology (2 works) · Paleontology (2 works) · Total organic carbon (2 works) · Aquifer (1 work) · Archaeology (1 work)