SYNOPSISDefatted jute stick was treated with sodium hydroxide solution (2% w / v ) at ambient temperature ( -32OC) and boiling water bath temperature (95-97°C). Infrared ( I R ) spectra of defatted jute stick and alkali-treated jute stick were studied. The IR spectra of the alkalitreated jute stick were conspicuous by the absence of the 1730 cm-' band, as compared to that of jute stick. Another characteristic feature of the alkali treated jute sticks is the absence of the band at 1240 cm-', which is replaced by the 1265 and 1225 cm-' bands; other bands in the above samples also recorded significant changes.

SynopsisThe infrared spectra of alkaline jute stick have been discussed and compared to that of untreated and control sample. A higher shift in the 0 -H and lower shift in the C-H stretching frequencies were observed in alkaline sample. The presence of a strong band at 1440-1430 cm-' may be due to the coupling of COO-frequency with CH2 deformation frequency. The C -0 stretching mode at 1240 cm-' disappears on alkaline treatment with the formation of new peaks at 1265 and 1225 cm-'. The P-glucosidic band at 895 cm-' is shifted to 880 cm-' with doubled intensity in alkaline jute stick.

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The chlorite holocellulose of mesta fiber (Hibiscus cannabinus) was extracted with alkaline solutions of successively increasing concentration and finally with alkaline borate solution.