Role of cellulose oxidation in the yellowing of ancient paper.

Application assessment of α-Tocopherol in conservation of historical cotton fabrics against hydrothermal oxidation by using accelerated-aged samples

the importance of textile historical works is not hidden from anyone In the field of preservation and restoration of historical and cultural objects. due to the organic structure of cellulose, Historical cotton fabrics are exposed to spontaneous oxidation and the degradation process will not stop even in an isolated environment. Keeping such sensitive works in the unfavorable conditions of the ...

Cellulose Sulfuric Acid: As an Efficient Bio Polymer Based Catalyst for the Selective Oxidation of Sulfides and Thiols by Hydrogen Peroxide

Cellulose sulfuric acid as a bio-polymer based solid catalyst efficiently catalyzes the selectively oxidation of sulfides to sulfoxides and thiols to disulfides using hydrogen peroxide as a green oxidant with good yields at room temperature. The developed method offers a number of advantages such as high selectivity, mild reaction conditions, simple operation, cleaner reaction profiles, low...

Evaluating the Role of antioxidants in the stabilization of hydroxypropyl cellulose by ATR-FTIR Spectroscopy

This study is aimed at evaluating the performance of tetrakismethylene-3-3,5-di-tert-butyl-4-hydroxyphenyl propionate methane S1010, tris2,4-di-tert-butylphenyl phosphite S1680 and ascorbic acid AA antioxidants in stabilization of hydroxypropyl cellulose HPC. For this purpose, a number of films with weight percent ratios of 0.4 w/w were prepared in a 1 isopropanol solution w/v. Then, the films ...

Investigating the Role of the Barmaki Family in the Transmission of Ancient Medical Knowledge to the Islamic Era (Hippocratic Medicine and Indian Medicine)

In the history of post-Islamic Iran, the Barmaki family is one of the most important families in preparing the background for the transfer of the scientific heritage of ancient times, including medical knowledge to the Islamic period. From the beginning of the Abbasid era, this family penetrated the structure of the political system and after gaining political-economic power and supporting tran...

The Role of Myth in Art During the Millennia: A critique of Nature in Ancient Art, Marzieh Torajie