RESUMO
In this present research programme,chitosan nanocomposites were prepared by using C 30B which is an organomodified nanoclay by solvent casting method and were characterized by FTIR, XRD and SEM. Different chitosan films like acetate, formate, citrate, lactate and ascorbate were also prepared by taking different types of solvent like acetic acid, formic acid, citric acid, lactic acid and ascorbic acid respectively. The properties like thickness, density and transparency of those films were studied. The antimicrobial activity of those films were also investigated against various food borne pathogens like S.aureus, B.cereus, S.typhimurium and E.coli and it was found that all chitosan citrate films showed higher inhibitory activity against all the types of pathogens.
RESUMO
A study was conducted by house-to-house visit during 2nd and 3rd round of IPPI in Nov and Dec 2000 in two slums adjacent to Medical College Kolkata. Total houses visited in these two rounds were 2836 and 611 children were immunised at home. Mothers of 503 children (who did not receive IPPI dose at booth on NIDs) were interviewed. For rest 104 children, mothers were not available during the time of visit. The result showed that infants were the largest group (30.6%) to receive vaccine at home. Majority (84.1%) was permanent residents of the locality. Only 4.2% were Bengali-speaking Hindus while most other were Hindi or Urdu speaking Muslims. "Health workers will bring vaccine at door steps" was the reason of non-attendance at booth by 30.2% parents. No routine immunisation was received by 14.9% children. The source of information regarding IPPI was, 45.4% from medical students, 28.5% from health workers, 15.1% from TV, 5.6% from relatives and neighbours, 3.6% from miking and 1.8% from newspapers respectively.