English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Samples from the Ross Sea cores are among the richest yet analyzed for hydrocarbon gases; and they contain small but significant amounts of ethane and heavier gaseous hydrocarbons. The gas was anticipated because of shipboard observations of its presence. This observation also was responsible for the greater sampling density, particularly at Site 272. As in previous cases the samples were collected soon after recovery and sealed in ordinary size 2 h tin cans. Upon receipt at the laboratory, 21 cans were chosen for these analyses. A few of the cans had already begun leaking—evidenced by salt incrustation and corrosion at one or more points along the edges of the lid. Some of these leaking cans were found to contain virtually no hydrocarbon gas, so each can was carefully inspected, and the few bad ones were set aside. The selected cans were punctured through a rubber septum clamped tightly to their sides. A measured volume of each can's air space was removed with a hypodermic syringe and introduced into the inlet system of a Perkin-Elmer Model 154 B gas chromatograph with a hydrogen-flame detector. The column is a 2-meter P.E. column B (di-2-ethylhexyl sebacate); temperature, 46°C; helium pressure, 8 psig; hydrogen pressure, 8 psig. From the volume of gas and sediment in the cans, and the gas chromatographic results, the gas contents were calculated as parts per million of gas by volume (i.e., mis of gas at STP per 10 mis of sediment as received). After gas-space samples were run in duplicate, the cans were opened and a sample of sediment was removed and agitated with water in a Waring blender to remove any gas remaining in the sticky mud. The gravities were so small (a few ppm of methane at most), that after the first few samples only the can's free (gas-space) gas was analyzed subsequently.

Hydrocarbon Gases in Canned Core Samples from Leg 28 Sites 271, 272, and 273, Ross Sea