The aim of this project has been to prepare nanocrystalline cellulose (CNC) from hydrochloric acid hydrolysis and optimise the process. CNC was also prepared from sulphuric acid hydrolysis to use as a reference. The starting material in both these processes was microcrystalline cellulose (MCC), therefore another cellulose source was used to try and prepare CNC from. The cellulose was extracted ...

The plant powder of Jaswand (Hibiscus rosa-Sinensis) were activated with sulphuric acid and used as low cost easily available and renewable biological adsorbent for the removal of acid dyes (acid blue, acid red and malachite green) from aqueous solution. Batch experiments were carried out for adsorption kinetics and isotherms. Operating variable studied were pH, temperature, adsorbent dose, ini...

IN a recent paper by Cohen & Harris [1937] it is shown that the lignin of maple wood is, to a limited extent, soluble in hot dilute sulphuric acid and also in hot water. That a fraction of lignin is soluble in water has been suspected for many years and recently it has been definitely suggested by Paloheimo [1929]. The solubility of lignin in dilute acids is discussed by Schorger [1926, p. 92] ...

tamarinda (tamarindus indica) and indian gum arabica (acacia arabica) are two ornamental trees of beautiful shape, extensive shading, and tolerant to high temperatures, making them suitable alternatives for landscape design in warm- arid regions. tamarinda and indian gum arabica are commonly propagated by seed. however, seed physical dormancy causes delay in seed germination. this study was car...

background: the compositions of ferrous sulphate, agarose and xylenol orange dye (fax) and ferrous sulphate, gelatin and xylenol orange dye (fgx) in solution of distilled water and sulphuric acid are two tissue-equivalent gel dosimeters. ionizing radiation causes oxidation of fe2+ ion to fe3+ ions which diffuse through the gel matrix and blur the image of absorbed dose over a period of hours af...

on the capacity of tissue elements to strain metachromatically. Surprising as it may seem, adequately fixed and dehydrated tissues withstand five minutes' immersion in concentrated sulphuric acid without charring or showing any severe disturbance of their structure. Subsequent staining with a metachromatic dye reveals that a greatly increased range of tissue elements shows a metachromatic affin...