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The polymerization of acrylamide (AM) in an aqueous medium and in the presence of anionic [sodium lauryl sulfates (NaLS)], cationic [cetyltrimethyl ammonium bromide (CTAB)], and nonionic (Brij-35) surfactants was carried out at 60 C with potassium persulfate as the initiator. The percentage conversion and rate of polymerization (R p ) decreased in the presence of the surfactant, and the inhibition effect of the surfactant was in the order CTAB > Brij-35 > NaLS. The viscosity data, namely, the intrinsic viscosity, viscosity-average molecular weight, and shape factor, were also obtained in each case. The polymer was characterized by Fourier transform infrared spectroscopy and thermogravimetric analysis. The inhibition effect of the surfactant on R p of AM was explainable on the basis of hydrophobic and electrostatic interactions during the association/binding between the surfactant and monomeric free radical of the monomer. V C 2011 Wiley Periodicals, Inc. J Appl Polym Sci 122: [981][982][983][984][985][986] 2011

The aggregation behaviour of two cationic surfactants, viz. cetyl trimethyl ammonium bromide (CTAB) and N-cetyl pyridinium chloride (CPC), in different concentrations of water-soluble polyacrylamide has been studied in alkaline medium by electrical conductivity and surface tension measurements. A decrease in the critical micelle concentration (CMC) of the surfactant with an increase in polymer content in the mixture was observed. The thermodynamic and surface parameters have been determined and discussed. The results indicate that micellisation becomes more favourable at higher polymer content.

This research was performed to characterize the hypoglycemic effect of ethanolic extract of Polypodium decumanum leaves in alloxanized diabetic rats. The ethanolic extract of Polypodium decumanum leaves was administered orally at different doses (250 and 500 mg kg-1) to normal rats. The dose of 500 mg kg-1 was found to be more effective dose in oral route and it decreases Blood Glucose Level (BGL) by 22.2 % in normal healthy rats after 14 days of administration. After daily treatment with the both dose (250 and 500 mg kg-1) of ethanolic Polypodium decumanum extract for 21 days to severely Diabetic (FBG 300-350 mg dL-1) rats, the BGL reduced to 128.2 mg dL-1 by 250 mg kg-1 and 111 mg dL-1 by 500 mg kg-1. The findings of our study indicate the hypoglycemic and potential antihyperglycemic nature of the extract. It is not similar effective when compared with the standard drug Glibenclamide, but quite effective in reducing BGL. It reduces blood glucose level up to 194.1, 119.4, 111 mg dL-1 at successive days of 7, 14, 21, at the dose of 500 mg kg-1 in rats compare with the standard drug which reduces blood glucose level up to 256.6, 140.7, 101.2 mg dL-1. We found that the ethanolic extract of plant Polypodium decumanumleaves is only 10 % less effective in reducing the BGL compare to standard drug (Glibenclamide).

Available online on:15.06.2017@http://ijrdpl.com http://dx.doi.org/10.21276/IJRDPL.227 8-0238.2017.6(4). [2685][2686][2687][2688] ABSTRACT:The widespread use of antibiotics has led to an increase in multidrugresistant bacteria, which represent a serious risk of infection, in view of this problem the aim of this research was performed to characterize the antibacterial effect of ethanolic and petroleum ether extract of Polypodium decumanum leaves against three gram-positive bacteria(Staphylococcus aureus, Bacillus subtilius, and Streptococcus pyogenes) and three gram-negative bacteria(Pseudomonas aeruginosa, Escherichia coli, and Pseudomonas alcaligenes) in vitro by disc-diffusion method. In this study, we have taken 3 concentrations of Polypodium decumanumplant extract (ethanolic and petroleum ether) viz. 50 mg/ml, 100 mg/ml, and 200 mg/ml, and observed that the ethanolic extract of Polypodium decumanumof the concentration of 200 mg/ml showed higher antibacterial effect compare to other concentration against all 3 gram-positive bacteria and all 3 gram-negative bacteria, but not higher than standard drug Ampicillin.