हीमिक इसके अंग्रेजी अर्थ का उदाहरण

San Diego Chargers players A contact explosive is a chemical substance that explodes violently when it is exposed to a relatively small amount of energy (friction, pressure, sound, light).

Chemicals like gasoline, a fuel, burn instead of explode because they must come into contact with oxygen in the combustion reaction.

The resulting chemical structure is significantly different, with the isocyanate groups on the MDI trimerising to form isocyanurate groups which the polyols link together, giving a complex polymeric structure.

This isocyanurate polymer has a relatively strong molecular structure, because of the combination of strong chemical bonds, the ring structure of isocyanurate and high cross link density, each contributing to the greater stiffness than found in comparable polyurethanes.

The greater bond strength also means these are more difficult to break, and as a result a PIR foam is chemically and thermally more stable: breakdown of isocyanurate bonds is reported to start above 200"nbsp;°C, compared with urethane at 100 to 110"nbsp;°C.

Depending on the product application greater stiffness, chemical and/or thermal stability may be desirable.

Author–date: primarily used in the natural sciences and social sciences, and recommended by the American Chemical Society and the American Psychological Association (APA);.

They have different mechanical and optical properties compared to the large grained materials of the same chemical composition.

Plants and fish need not be present at all, but if they are, they must match what would be found in nature in the habitat being represented, as must any gravel and hardscape, and even the chemical composition of the water.

Before Mazumdar could move, she met Leslie Auchincloss, the founder of Biocon Biochemicals Limited, of Cork, Ireland.

After a brief period as a trainee manager at Biocon Biochemicals Limited, of Cork, Ireland, to learn more about the business, Kiran Mazumdar Shaw returned to India.

Biocon Biochemicals of Ireland was acquired from Leslie Auchincloss by Unilever in 1989.

In 1997, Unilever sold its specialty chemicals division, including Biocon, to Imperial Chemical Industries (ICI).