Deacidification plays an important role in the conservation of paper-based cultural heritage objects. Herein, a novel approach for scale objects is proposed using mixture argon and ethylene oxide (EO-Ar) first time. The optimum process conditions deacidification system are determined by orthogonal testing. To evaluate stabilization effect paper treated with EO-Ar, degradation mechanical propert...

Utilization of l-malic acid by yeast strain Hansenula anomala IGC 4380 is subject to glucose repression. Derepressed mutants were obtained with UV light by use of the nonmetabolizable glucose analog 2-deoxyglucose as a selective agent. Three mutant strains degraded l-malic acid in the presence of up to 30% (wt/vol) glucose and are of potential interest for the biological deacidification of grap...

Abstract Bookkeeper, the most widely used deacidification process based on MgO particles, was systematically evaluated two sets of nonvaluable historical paper samples. Established analytical methods, such as pH and alkaline reserve determination, were used, well SEM EDS analyses to evaluate distribution Mg-rich particles surface in cross-section paper. The degradation rate constants untreated ...