Medical research

New male contraceptive does not involve hormones

A team of researchers at a company called Contraline has developed a new kind of male contraceptive. Instead of using hormones to disrupt sperm production, the new technique involves placing a hydrogel called ADAM into the ...

Oncology & Cancer

New injectable gel offers promise for tough-to-treat brain tumors

Like the hardiest weed, glioblastoma almost always springs back—usually within months after a patient's initial brain tumor is surgically removed. That is why survival rates for this cancer are just 25 percent at one year ...

Oncology & Cancer

Researchers design new hydrogel for more targeted cancer treatments

University of Toronto researchers have designed a new way to grow cells in a lab that enables them to better emulate cancerous tumors. The platform—based on a type of material known as a hydrogel, a soft jelly-like substance—opens ...

Biomedical technology

A gel-based sensor that detects wound infections

A team of researchers affiliated with a large number of institutions in Singapore has developed a gel-based sensor that can be used to detect infections in open wounds. In their paper published in the journal Science Advances, ...

Medical research

A new injectable hydrogel for cartilage repair

A team of researchers affiliated with a host of institutions in China has developed an injectable hydrogel for use in repairing damaged cartilage. In their paper published in the journal Science Advances, the group describes ...

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Gel

A gel (from the lat. gelu—freezing, cold, ice or gelatus—frozen, immobile) is a solid, jelly-like material that can have properties ranging from soft and weak to hard and tough. Gels are defined as a substantially dilute cross-linked system, which exhibits no flow when in the steady-state. By weight, gels are mostly liquid, yet they behave like solids due to a three-dimensional cross-linked network within the liquid. It is the crosslinks within the fluid that give a gel its structure (hardness) and contribute to stickiness (tack). In this way gels are a dispersion of molecules of a liquid within a solid in which the solid is the continuous phase and the liquid is the discontinuous phase.

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