Self-contained and streamlined methane and/or high purity...

Self-corrected assay device

Self-feeding roller bottle

Self-spreading microbiological culture device

Self-sufficient incubation assembly

Sensing surfaces capable of selective biomolecular interactions,

Sensor wand, and composting apparatus including same

Slow release microorganism dispenser

Sludge treatment tank and construction method thereof

Sludge treatment tank thereof construction method thereof

Small scale automated composter

Solar still

Solid organic waste processing apparatus

Solid organic waste processing apparatus

Solid state bio-sensor

Solid-state fermenter and method for solid-state fermentation

Solid-state photometer circuit

Specimen collection and test unit

Specimen collection package

Specimen receptacles for swabbing sets