Medical research

Researchers use hydrogel to repair cartilage

(Medical Xpress)—Researchers in the US have created a type of hydrogel that has proven to be effective in treating patients with damaged cartilage. The gel, the team writes, in their paper published in the journal Science ...

Health

Diets high in fiber won't protect against diverticulosis

For more than 40 years, scientists and physicians have thought eating a high-fiber diet lowered a person's risk of diverticulosis, a disease of the large intestine in which pouches develop in the colon wall. A new study of ...

Arthritis & Rheumatism

Lower GI problems plague many with rheumatoid arthritis

Add lower gastrointestinal (GI) problems such as ulcers, bleeding and perforations to the list of serious complications facing many rheumatoid arthritis patients. They are at greater risk for GI problems and gastrointestinal-related ...

Obstetrics & gynaecology

IUD perforation is rare, but women should still know about it

Women who choose to use an intrauterine device, or IUD, for birth control should be aware of the very small possibility that the device could puncture their uterus. They should know how to recognize that circumstance if it ...

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Perforation

A perforation is a small hole in a thin material or web. There is usually more than one perforation in an organized fashion, where all of the holes are called a perforation. The process of creating perforations is called perforating, which involves puncturing the workpiece with a tool.

Perforations are usually used to allow easy separation of two sections of the material, such as allowing paper to be torn easily along the line. Packaging with perforations in paperboard or plastic film is easy for consumers to open. Other purposes include filtrating fluids, sound deadening, allowing light or fluids to pass through, and to create an aesthetic design.

Various applications include packaging films (to allow the contents to breathe), medical films, micro perforated plate and sound and vapor barriers.

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