Letâs look at ferns as an example of alternation of generations. The fern plants you see out in the woods, or in a garden, or by a river are sporophytes. They produce spores. If you turn over a fern frond (thatâs just a fancy word for leaf), sometimes youâll see little circles all over the underside of the leaf.
Tricyclic Antidepressant (TCA) Overdose. California Poison Control 1-800-876-4766. Pediatric considerations. Low toxicity threshold of TCAs. Therapeutic doses range from 2-4 mg/kg/d. Toxicity is observed at doses of 10-20 mg/kg. Ingestion of only two 50-mg tablets in a 10-kg toddler can be sufficient. to produce symptoms of toxicity.
THE TRICHLOROACETIC (TCA) PEEL. Trichloroacetic Acid, often referred to as TCA, is an effective chemical agent used to exfoliate and renew the skin on a superficial to deep level. TCA is commonly applied to the face, neck, dcollet, hands and legs. In addition, TCA is also an excellent spot treatment and can be used to exclusively peel isolated areas of the skin.