A push-pull method, previously used in groundwater analyses, was successfully adapted for measuring sulfide turnover rates in situ at different depths in the meromictic Lake Cadagno. In the layer of phototrophic bacteria at about 12 m in depth net sulfide consumption was observed during the day, indicating active bacterial photosynthesis. During the night the sulfide turnover rates were positiv...

A group of sterically encumbered peri-substituted acenaphthenes have been prepared, containing tin moieties at the 5,6-positions in 1-3 ([Acenap(SnR3)2], Acenap = acenaphthene-5,6-diyl; R3 = Ph3 (1), Me3 (2); [(Acenap)2(SnMe2)2] (3)) and phosphorus functional groups at the proximal peri-positions in 4 and 5 ([Acenap(PR2)(P(i)Pr2)] R2 = Ph2 (4), Ph((i)Pr) (5)). Bis(stannane) structures 1-3 are d...

Titanium Nitride (TiN) is a wear resistant and complementary metal oxide silicon (CMOS) compatible material that is increasingly being investigated for MEMS applications. Incorporating any new material into a MEMS device requires the development of a processing strategy. This paper discusses a wet-etching strategy for patterning and releasing TiN features on Cr sacrificial layers. Filtered arc ...

Root tips from the marsh grass Spartina alterniflora, collected from areas of high and low pore-water sulfide, exhibited a substantial capacity to catalyze sulfide oxidation, as determined by closed-chamber respirometry. A large proportion of this catalysis was apparently nonenzymatic and was higher in roots of plants from the high-sulfide versus the low-sulfide site. Activity exhibiting charac...

Tin is a naturally occurring element. It is a silver-white, malleable, and somewhat ductile metal. The earth's crust contains about 2–3 ppm tin, comprising 0.0006% of the earth's crust. Major uses of tin include cans and containers, electrical, construction, and transportation. Industrially important tin compounds can be categorized as inorganic (those without a tin-carbon bond) and organic (th...

Base metal mineralization at the Baal Gammon and Isabel deposits of Herberton Mineral Field (HMF) is hosted in metamorphosed greywacke beds Hodgkinson Formation, which were intruded by granite, porphyry dykes overlain volcanic rocks Kennedy Igneous Association during Carboniferous Permian. The tin deposit a silicified, chlorite-altered, quartz-feldspar (UNA Porphyry). polymetallic veins hosting...