Ultrastructural analysis of the sporozoite of Cryptosporidium parvum

Article Abstract:

The ultrastructure of the protozoon Cryptosporidium parvum's sporozoite was investigated through cryotechnique and energy-filtering transmission electron microscopy. The cryotechnique generated image thick sections of the parasite that preserved cell integrity. In the longitudinal section studied, the cell exhibited the typical conical-shaped apical region which contained most of the organelles. The sporozoite had a lone rhoptry having an organized lamellar body, an absent mitochondria or conventional Golgi apparatus.

Research, Methods, Usage, Physiological aspects, Cells (Biology), Morphology (Biology), Coccidia, Cryptosporidium, Cells, Cell organelles, Organelles, Cryopreservation of organs, tissues, etc., Organ cryopreservation, Tissue cryopreservation, Ultrastructure (Biology), Frozen tissue sections, Frozen sections (Histology), Sporozoa

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Tire shred guidelines minimize fires

Article Abstract:

Scrap tire recycling plants are being encouraged to abide by industry guidelines to reduce the risk of fire in tire shred fills. The Ad Hoc Civil Engineering Committee's Design Guidelines to Minimize Internal Heating of Tire Shred Fills were drawn up after several fires broke out in 1995. Recommendations for tire shred size and wood chips are given, together with design suggests for fill dimensions.

Standards, Waste management, Recycling (Waste, etc.), Recycling, Tires, Scrap Tire Management Council

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After NAFTA

Article Abstract:

Opposition to NAFTA is increasing in the US as fears that the treaty will cost the country a lot of jobs and that environmental standards will be ignored reverberate through Congress. Studies seem to indicate that these concerns are not justified.

Economic aspects, Commercial treaties, Trade agreements

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