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Polycarbonate is commonly used in eye protection, as well as in other projectile-resistant viewing and lighting applications that would normally indicate the use of glass, but require much higher impact-resistance. Polycarbonate lenses also protect the eye from UV light.
A polycarbonate is an oxocarbon dianion consisting of a chain of carbonate units, where successive carbonyl groups are directly linked to each other by shared additional oxygen atoms. That is, they are the conjugate bases of polycarbonic acids , the conceptual anhydrides of carbonic acid , or polymers of carbon dioxide .
Parietal epithelial cell (PEC) Podocyte; Angioblast → Endothelial cell; Mesangial cell. Intraglomerular; Extraglomerular; Juxtaglomerular cell; Macula densa cell; Stromal cell → Interstitial cell → Telocytes; Kidney proximal tubule brush border cell; Kidney distal tubule cell; Connecting tubule cells; α-intercalated cell; β-intercalated ...
This lead to a European Union on 19 December 2024 to ban BPA in all the food contact materials, including plastic and coated packaging [91]. The ban will come into force after an implementation period of up to three years. BPA exhibits very low acute toxicity (i.e. from a single large dose) as indicated by its LD 50 of 4 g/kg (mouse).
Studies have shown that pumping milk, freezing it in plastic bags, then subsequently heating it up will increase the contamination of microplastics in the milk. [38] Similar results have been seen from heating plastic reusable food containers in a microwave, showing the release of both microplastics and nanoplastics.
Image credits: nineteensickhorses #3. Heather Teague. She was dragged into the woods from a riverbank. The abduction was witnessed from across the river by a man using a telescope.
An artificial cell, synthetic cell or minimal cell is an engineered particle that mimics one or many functions of a biological cell. Often, artificial cells are biological or polymeric membranes which enclose biologically active materials. [ 1 ]
(Reuters) - The Washington Post said on Tuesday it would lay off about 4% of its workforce or less than 100 employees in a bid to cut costs, as the storied newspaper grapples with growing losses.