الموضوع: اريد ترجمة بعض الفقرات العلمية الى العربية

Coated paper. In the XIX and XX centuries several method of surface coating have been
adopted, characterized by inorganic materials and polymeric binders. Although the FTIR technique
is not specific for inorganic fillers, some can be detected through their infrared absorbance. Clay
materials (Fig 2b) are characterized by the small doublet at 3690 and 3620 cm-1 together with other
sharp peaks at 1000 and 910 cm-1, while talc can be detected only with the matrix algorithm[2]. The
features of CaCO3 have been already depicted while gypsum (CaSO4*2H2O) shows (Fig 2c) a typical
wavy pattern in the OH region (3700-3000 cm-1) together with a small but sharp peak at 1620 cm-1
and an increase of the cellulose band at 1110 cm-1. Infusorial earth (diatomite) and TiO2 generally
escape the FTIR ****ysis. Most of the organic binders can be identified in FTIR-ATR mode which
probes mainly the surface of paper. Waxes as calcium stearate (Fig 2d) show a typical doublet at
1577 and 1541 cm-1.

كريمة احب الله (karima phy)Google إجابات


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