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How Electric Motors Work

Flick a switch and get instant power—how our ancestors would have loved electric motors! You can find them in everything from electric trains to remote-controlled cars—and you might be surprised how common they are. How many electric motors are there in the room with you right now? There are probably two in your com…[Leggi tutto]

Medical gloves in the era of coronavirus disease 2019 pandemic

The current coronavirus 2019 disease (COVID-19) pandemic has greatly changed our perspective of the risk for infection from contact, and the use of personal protective devices (PPDs) usually reserved for health care workers (HCWs) has spread to the general population, sometimes…[Leggi tutto]

Solvent Recovery

Solvent recovery is a form of waste reduction. In–process solvent recovery still is widely used as an alternative to solvent replacement to reduce waste generation. It is attractive, like end–of–pipe pollution control, since it requires little change in existing processes. There is widespread commercial availability of solve…[Leggi tutto]

Paper Machine

On the paper machine, the size press is used to apply surface size to dried paper.182,183 Starch is the most frequently used binder in surface sizing. Besides raising surface strength, starch also imparts stiffness, lowers water sensitivity, reduces dimensional changes and raises air leak density of the sheet. In conventional…[Leggi tutto]

Tubes and pipes in technical and everyday use

In the beginning was the hollowed-out tree trunk, one of the first capillary tube to be crafted by human hand. With a vast array of models in the plant world to inspire him, Homo sapiens had a much easier job inventing the tube than the wheel for which, by contrast, nature had no example to…[Leggi tutto]

All You Need to Know About Quartz Countertops

Beautiful, durable, easy-care quartz is among the most popular countertop materials available—but it is pricey. If you’re considering quartz for your kitchen or bathroom, first get the 411 on this trendy topper before you buy. This complete countertop primer will set you up all of the nec…[Leggi tutto]

USB Power Delivery is the fastest way to charge iPhone and Android devices

With the current generation of smartphones and their much faster processors and vivid, high-resolution displays, and always-on connectivity, demands on battery performance are now higher than ever.

You may have noticed that, while you are on the road, you're…[Leggi tutto]

The best gaming chairs in 2021

The best gaming chair is the perfect finishing touch to a modern PC gaming setup. It really will bring your whole desktop together and make it look supremely suave. Yet these gaming thrones are good for more than style points, the top gaming chairs will also give your weary back an ample place to rest. This…[Leggi tutto]

Useful information on External Gear Pumps

A gear pump is a type of positive displacement (PD) pump. Gear pumps use the actions of rotating cogs or gears to transfer fluids.  The rotating gears develop a liquid seal with the pump casing and create a vacuum at the pump inlet.  Fluid, drawn into the pump, is enclosed within the cavities of the…[Leggi tutto]

Swelling kinetic study of poly(methyl vinyl ether-co-maleic acid) hydrogels as vehicle candidates for drug delivery

This review highlights recent progress in the synthesis and application of vinyl ethers (VEs) as monomers for modern homo- and co-polymerization processes. VEs can be easily prepared using a number of traditional synthetic…[Leggi tutto]

UChicago institute helps reassemble ancient, rare art from first to 6th centuries

BAMIYAN, Afghanistan — Here is a reminder to someone with the initials A.B., who on March 8 climbed inside the cliff out of which Bamiyan’s two giant Buddhas were carved 1,500 years ago.

In a domed chamber — reached after a trek through a passa…[Leggi tutto]

How Fuel Injection Systems Work

In trying to keep up with emissions and fuel efficiency laws, the fuel system used in modern cars has changed a lot over the years. The 1990 Subaru Justy was the last car sold in the United States to have a carburetor; the following model year, the Justy had fuel injection. But fuel injection has been around…[Leggi tutto]