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Different catalysts require unequal overpotential for this reduction reaction to take place. Hydrogenases are attractive since they require a relatively low overpotential . In fact, its catalytic activity is more effective than platinum, which is the best-known catalyst for the H 2 evolution reaction. [ 38 ]
3.5" Floppy disk drive by Alps Electric with FRU number A field-replaceable unit (FRU) [1] is a printed circuit board, part, or assembly that can be quickly and easily removed from a computer or other piece of electronic equipment, and replaced by the user or a technician without having to send the entire product or system to a repair facility.
The computer can run CP/M if equipped with double-sided, double density floppy disk drives. Software was published on cassette tapes , with more than one hundred games and programs. [ 5 ] Some games were conversions of popular Arcade games in the early 1980s, adapted to the computer's limitations.
Because computer parts contain hazardous materials, there is a growing movement to recycle old and outdated parts. [66] Computer hardware contain dangerous chemicals such as lead, mercury, nickel, and cadmium. According to the EPA these e-wastes have a harmful effect on the environment unless they are disposed of properly.
Computer monitors are typically packed into low stacks on wooden pallets for recycling and then shrink-wrapped. [1]Electronic waste recycling, electronics recycling, or e-waste recycling is the disassembly and separation of components and raw materials of waste electronics; when referring to specific types of e-waste, the terms like computer recycling or mobile phone recycling may be used.
The Notebook 9 was the flagship laptop product of Samsung until being superseded by Samsung Galaxy Book (Flex and Ion models) in 2020. The original Series 9 from 2011 was designed with performance and portability in mind and notable for its "ultrathin" thickness; [ 2 ] it and its successors were among the thinnest laptops in the world.
It consists of a length of tube of around 4 mm to 6 mm in diameter, often made of coiled steel springs, with a push-button on one end.Three metal wires protrude from the other end, each sprung to bend outwards, away from the tube's axis, but with their tips bent inwards to form teeth.
Traditionally, most computer cases required computer case screws to hold components and panels in place (i.e. motherboard, PSU, drives, and expansion cards). From the early 2000s onwards there is a trend towards tool-less cases, in which components are held together with snap-in plastic rails, thumbscrews, and other methods that do not require ...