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Articles by Nita Sultana
Total Records ( 2 ) for Nita Sultana
  V. Emanuel , V. Adrian and Nita Sultana
  The aim of this study was to obtain a freeze-dried extract with an important antioxidant and antimicrobial effect from Rosmarinus officinalis. The extracts were obtained in a fluidized bed solid extractor and there has resulted that the optimal values of phenols, flavonoids and the highest reduction power were determined when using 70% ethanol as solvent, the antioxidant activity ranging between 90-95%. In case of the freeze-dried product, the maximum antioxidant activity was registered when using 0.2 mg mL-1 powder and the results were optimal as well in case of determining flavonoids, phenols and the reduction power. The antimicrobial effect of the extracts and of the freeze-dried product were quantified by using the Colony Quant software on the strains Escherichia coli CBAB 2, Bacillus cereus CMGB 215, Listeria innocua CMGB 218. An inhibition area of maximum 2 cm resulted when using 70% ethanol as solvent. The optimal inhibitory effect of the freeze-dried product, of around 1.8 cm, was determined by a 0.2 mg mL-1 concentration.
  Vamanu Adrian , Vamanu Emanuel , Popa Ovidiu , Campeanu Gheorghe , Albulescu Radu , Drugulescu Manuel , Nita Sultana and Babeani Narcisa
  This study presents the evolution of a Lactobacillus plantarum 2s strain and of a Lactobacillus acidophilus 1a strain on media containing pollen and honey. The following parameters were determined: CFU value, lactic acid production, sugar consumption and presentation of the final product. The researches were performed during 72 h, in tightly closed recipients, at a temperature of 37 °C, containing various quantities of milled or non-milled pollen (P1: 20 g non-milled pollen, 3 g honey, 5 mL distilled water; P2: 20 g milled pollen, 3 g honey, 5 mL distilled water; P3: 20% non-milled pollen, 3% honey; P4: 20% milled pollen, 3% honey). The media were very well homogenized before inoculation. The inoculation was made only after the medium gained a homogenous consistency. The inoculum consists of a 48 h culture of Lactobacillus plantarum 2s and Lactobacillus acidophilus, on LE medium, in equal proportions. The testing of the nutritive value of the symbiotic product was made on wistar rats, males and females, divided into lots of 10 animals each. The animals were administered symbiotic product every day, in their food, in intakes of 2 mg kg-1 (lot I), 20 mg kg-1 (lot II) and 200 mg kg-1 (lot III), compared to a control. During the 4 weeks of the experiment, no lethality cases were recorded in any of lots, or in control. The animals involved in the experiment were examined daily and did not present changes of appetite, of behavior or clinical signs of disease.
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