Genetics

Researchers one step closer to preventing preeclampsia

Researchers have identified several differences in DNA methylation in people who experienced preeclampsia during pregnancy, according to a new study from Oregon Health & Science University. The study also revealed these differences ...

Neuroscience

Decoding sleep to reveal our state of health

Sleep takes up almost one third of our life, yet many of its secrets remain unexplained. To penetrate the mystery, neuroscientists are trying to decipher some of the mechanisms of this basic biological function, so key to ...

Adhesive

An adhesive, or glue, is a mixture in a liquid or semi-liquid state that adheres or bonds items together. Adhesives may come from either natural or synthetic sources. The types of materials that can be bonded are vast but they are especially useful for bonding thin materials. Adhesives cure (harden) by either evaporating a solvent or by chemical reactions that occur between two or more constituents.

Adhesives are advantageous for joining thin or dissimilar materials, minimizing weight, and when a vibration dampening joint is needed. A disadvantage to adhesives is that they do not form an instantaneous joint, unlike most other joining processes, because the adhesive needs time to cure.

The earliest known date for a simple glue is 200,000 BC and for a compound glue 70,000 BC.

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