"Gas Samplers"

Ideal tool for aquatic ecosystem studies. Collect periphyton samples with ease using this specialized sampler, perfect for water quality and aquatic ecosystem studies.

Dark gray with abundant gas pocket vesicles.

Scoria is a dark-colored rock formed from lava with a high gas content.

Pure, white, earthy “China clay”.

Gray to white, coarse crystalline, carbonate rock.

Pink/gray coarse carbonate rock.

Create a suitable home for fish, brine shrimp and other marine invertebrates. A 450 g bag will make three gallons of sea water (1.020-1.025 specific gravity). (Please note: This item is recommended for use with saltwater aquaria only.)

Necturus liver. The enzyme RNAase specifically digests RNA, confirming the existence of RNA in the nucleolus of the cytoplasm. Compare to RNA (sect) mgp.

For consistent readings underwater.

Your student can hold a piece of outer space!