Biomass index and viscosity values of Moringa oleifera that influenced by Enterococcus faecalis

ABSTRACT Enterococcus faecalis (E. faecalis) has been reported as the primary infectious agent in rootcanals. Moringa oleifera (M. oleifera) is said to have the ability to prevent the development of E. faecalis.The purpose of this study was to measure the biomass index and viscosity of the ethanol extract ofMoringa (Moringa oleifera) leaves, which were affected by E. faecalis. This study used Moringa oleiferaand E. faecalis. The biomass index of Moringa oleifera extracts using the Biomass Assay method and theviscosity with the Ostwald Viscometer. The biomass index of M. oleifera affected by E. faecalis at aconcentration of 12.5% for 48 hours was better than other concentrations. CHX has a perfect biomassindex at 24 hours, while at 48 hours, the biomass index increases to close to 10%. Meanwhile, M. oleiferahas a high viscosity at a concentration of 12.5% (0.81 Cp). The results of the viscosity examination werein line with the biomass index with a positive correlation (0.92) and p0.05 between the M. oleiferaconcentrations between the two treatments. M. oleifera has very good biomass and viscosity index at aconcentration of 12.5%. Both are determinants of the development of E. faecalis under the influence of M.oleifera.KEYWORDS bomassa indek, viskositas, E. faecalis

Effect of Solvents on the Ultrasonic Velocity and Acoustic Parameters of Polyvinylidene Fluoride Solutions

Ultrasonic studies provide a wealth of information in understanding the molecular behavior and intermolecular interaction of polymer solvent mixtures. Attempts were made to measure ultrasonic velocity, density, and viscosity for the mixture of polyvinylidene fluoride (PVDF) in acetone and dimethylformamide (DMF) of various stoichiometric ratios at 300 K using crystal controlled ultrasonic interferometer (Mittal make), pyknometer (specific gravity bottle), and Ostwald viscometer, respectively. The acoustic parameters adiabatic compressibility (β), intermolecular free path length (Lf), acoustic impedance (Z), relative association (RA), ultrasonic attenuation (α/f2), and relaxation time (τ) have been estimated using experimental data with well-known techniques. The variation of these acoustic parameters is explained in terms of solute-solvent molecular interaction in a polymer solution.

Hydrophobisation effectiveness of building ceramics, polymeric inorganic ultrasound integrated with the addition of fillers

The article describes the studies of efficacy of ceramic brick surface hydrophobisation by preparations based on silicones (micropolymer). The different series of specimens were subjected to a process of surface hydrophobisation by immersion for 15 s using the hydrophobizing formulations, whose structure was further sonificated by power of 400 W. In order to determine the average absorption of polymer by specimens in respective series, before the hydrophobisation samples were dried to a constant weight and weighed. Then, after 14 days of their immersion in the formulation, specimens were weighed again in order to determine the percent change in the sample weight to the weight of the dried sample. The impact of ultrasonic energy on the viscosity of the polymer (measured by Ostwald viscometer) and on the surface tension (measured by stalagmometer) was determined. The hydrophobic properties of the resulting nanofilm created on the surface of the ceramic brick were determined on the basis of the measurement of surface free energy γs (SFE) by using Owens – Wendt method measuring the sample surface contact angles with distilled water (highly polar liquid) and diiodomethane (a polar liquid) to determine the dispersive γsd and polar γsp components (expressed in mJ/m2). Based on the results, the effect of sonification on some adhesive and physico. – mechanical properties of the tested material surface was determined.

Preparation of Poly (N-4-Antipyrinyl or Procainyl Methyl Nadamic Acids) as Drug Polymers

Two new monomers of N-4-antipyrinyl methyl nadamic acid M1 and N-Procaienyl methyl nadamic acid M2 were synthesized from reaction of 4-Aminoantipyrine or procaine with methyl nadic anhydride at room temperature with dioxane as a solvent. The prepared monomers M1 and M2 were polymerized free radically with AIBN as initiator to corresponding polyamic acids P1 and P2, Which were converted to their sodium salt polymers P3 and P4 to enhanced their solubility's in water. The physical and chemical properties were studied for monomers and polymers, also FT-IR ,1H-NMR and UV. Spectroscopy was characterized of M1or M2. The intrinsic viscosity was measured by Ostwald viscometer at 30 0C .The swelling %was measured and the controlled release rates of drug polymers were studied in different pH values at 37 0C.

A viscometric study of the breakdown of casein in milk by rennin and rennet

SummaryIn the later stages of the reaction between rennin and casein drastic viscometric methods are undesirable, but in the first stages there is a fall in viscosity which may be satisfactorily measured in an Ostwald viscometer. Using fat-free milk, the viscosity at first falls linearly with time. At low rennet concentrations (Ce) this may be said to constitute a zero-order reaction (constant k0). At higher rennet concentrations and after longer times, the reaction passes to first order (constant k1). After very long times it doubtless becomes more complex.The values of k0 are proportional, over a considerable range, to the milk concentration (Cm), those of k1 being independent of Cm.For pure rennin k0 and k1 are proportional to Ce, but for commercial rennets they vary as a power (N) of Ce and the value of N appears to measure the rennin purity. The potentialities of the method for assessing rennet activities are also discussed.If the reduced viscosity (specific viscosity÷Cm) of fat-free milks is plotted against Cm, good straight lines are obtained which may be extrapolated to zero concentration to give a reliable value of intrinsic viscosity. The intrinsic viscosity falls progressively during the protein breakdown process but the slope of the curves (‘second order term’) remains unchanged.

SEDIMENTATION AND VISCOSITY STUDIES ON THE CAPSULAR AND SOMATIC POLYSACCHARIDES OF PNEUMOCOCCUS TYPE III

Sedimentation constants at infinite dilution have been found to be 1.89 and 4.06 for the somatic and capsular polysaccharides, respectively, from pneumococcus Type III. Intrinsic viscosities have been determined for the somatic and capsular polysaccharides of pneumococcus Type III using the Ostwald viscometer. Molecular weights and dimensions have been calculated for the somatic and capsular polysaccharides of pneumococcus Type III assuming the molecules to be prolate ellipsoids of revolution. Values for the somatic polysaccharide are: molecular weight, 26,400; diameter, 0.97 mµ; and length, 36.18 mµ. Values for the capsular polysaccharide are: molecular weight, 171,800; diameter, 1.04 mµ; and length, 177.87 mµ. The molecular weights were calculated for the somatic and capsular polysaccharides of pneumococcus Type III assuming the molecules to be flexible chains. The value of the molecular weight of the somatic polysaccharide is 31,500 and the value for the molecular weight of the capsular polysaccharide is 267,500. The molecules of both the somatic and capsular polysaccharides exhibit high degrees of asymmetry.