Detail Please Rinse and Return   Oleh:  [s.n] Jenis: Article from Bulletin/Magazine Dalam koleksi: The Economist (http://search.proquest.com/) vol. 403 no. 8787 (Jun. 2012), page S6. Topik: Recycling; Chemical Engineering; Enzymes; Research Ketersediaan Perpustakaan Pusat (Semanggi) Nomor Panggil: EE29.72 Non-tandon: 1 (dapat dipinjam: 0) Tandon: tidak ada     Lihat Detail Induk Isi artikel When ndustrialists use enzymes to speed up chemical reactions, they generally take care to attach those enzymes to solid surfaces and run the chemicals past them. Enzymes are expensive, and not to be thrown away lightly. Yet millions of householders do precisely that whenever they wash their clothes. Lots of washing powders contain enzymes, but these never get recycled. Instead, they are just flushed down the drain. Chandra Pundir and Nidhi Chauhan, biochemists at Maharshi Dayanand university in Haryana, India, propose to do something about that. Their plan was to see if they could stick the four enzymes used in washing powder--a-amylase, cellulase, protease and lipase--to PVC, a plastic that is cheap, chemically inert, wash-resistant, lightweight, easy to form into various shapes and nearly indestructible. To do so they took a beaker made of PVC, filled it with a mixture of nitric and sulphuric acids, and left it for six hours. Their purpose was to cleave the polymers on the beaker's inside surface into smaller molecules that have reactive chemical groups at their ends. Opini Anda Klik untuk menuliskan opini Anda tentang koleksi ini! Kembali

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