the erlenmeyer flask the residues were washed with distilled water about 200 g for 10 min and filtered again the washed residues were collected and dried at 110 u00b0 c the suspension was charged into a three necked flask and concentrated at 100 u00b0 c for about 4 hours to evaporate most part of the water the concentrated suspension was a brown and viscous fluid which was the bioadhesive composition from ddgs 140 ml of the naoh urea solution containing naoh 4 2 g urea 4 2 g and water 131 6 g were mixed with 30 g of ddgs the slurry was cooked in a pressure cooker maxi matic u00ae ec 8 maxi matic appliances industry ca for 25 minutes as shown in example 9 of table 1 or 35 min as shown in example 10 of table 1 the cooking pressure was 1 6 atmospheres the cooked slurry was diluted using about 50 g of water followed by filtration under vacuum using buckner funnel that is mounted over an erlenmeyer flask in this filtration process a polyester cotton cloth was used as the filtering medium after filtration the solid residues were retained over the cloth while suspension was collected in the erlenmeyer flask the residues were washed with distilled water about 200 g for 10 min and filtered again the washed residues were collected and dried at 110.