Aniline has been polymerized in the presence of a novel dopant sodio-5-sulfo-isophthallic acid (NaSIPA), via the chemical oxidative polymerization route. The thermal stability and processability of polyaniline prepared by indirect method (PD1) have been improved significantly (2908C) as compared to polyaniline doped with conventional inorganic dopants like HCl or H 2 SO 4 , without much loss of electronic conductivity (5.07 S/cm in PD1). This suggests its use for melt blending with engineering thermoplastics. However, polyaniline prepared by direct method (PD2) can be melt-blended only with conventional thermoplastics like polyethylene, polypropylene, polystyrene, etc. Low-temperature studies reveal the 1-D variable range hopping as a conduction mechanism for direct polymer (PD2), with parameters T o and r o as 4112 K and 15.1 S/cm, respectively. However, for indirectly doped polymer (PD1) Arrhenius-type model, having parameters |(E F 2 E C )| and r C as 0.04 eV and 28.4 S/cm, respectively, it suited well. The coherence length as found from XRD data was around 28.8 nm for PD1 and 25.2 nm for PD2.
1. The short-term (120 min) kinetics of Zn turnover has been studied in control subjects and patients with alcoholic liver disease after intravenous injection of 0.5 mg of 96.5% enriched 70ZnCl2. 2. The 70Zn enrichment of plasma was found closely to obey two-compartment kinetics and the derived two-component decay equation has been used to calculate the size and turnover of the initial two rapidly exchanging pools of body Zn. 3. In normal subjects isotopic Zn appears initially to equilibrate with the whole of the plasma Zn which comprises the first metabolic compartment, pool a. This has a size of 0.72 +/- 0.1 mumol/kg. 70Zn equilibration then occurs with a second compartment, pool b, consistent with a rapidly exchanging liver Zn pool of size 3.60 +/- 0.93 mumol/kg. The fractional turnover rate of pool b was found to be fivefold slower than that of pool a. 4. In the alcoholic group an expansion of pool a was observed (1.63 +/- 0.39 mumol/kg), but the size of the second pool was not significantly different from that of control subjects (5.55 +/- 1.0 mumol/kg), although its fractional turnover was significantly increased (Kab: control subjects, 0.018 +/- 0.002 min-1, alcoholic patients, 0.031 +/- 0.006 min-1). 5. These data therefore demonstrate that kinetic studies using stable isotopes of Zn can provide novel information on exchangeable Zn pools in man, but provide no support for the possibility of an underlying Zn depletion in patients with alcoholic liver disease.
Introduction: Boerhaavia diffusa is a species of flowering plant in the four o'clock family which is commonly known as punarnava, red spiderling, spreading hogweed, or tarvine. It is taken in herbal medicine for pain relief and other uses. Zinc oxide is used to treat or prevent minor skin irritations such as burns, cuts, and diaper rash. Some products may be used as sunscreen. Materials and Methods: Bovine serum albumin was used for the assay. 2ml of bovine albumin was mixed with 400micro microliter of hyaluronic acid mediated zinc nanoparticles in different concentrations. Diclofenac sodium in different concentrations was used as standard and then incubated for 55 c for 20 min and then the result was analysed spectrometrically. Results: According to the results, at 10μl, 20μl ,30μl , 40μl and 50μl concentration the percentage of inhibition is 25%, 50%, 75%, 85%, 90%, when compared to standard concentration and its percentage of inhibition is 95% . As the concentration increases, the percentage of inhibition also increases. Conclusion: From the above study, it is evident that zinc sulphate nanoparticles synthesised by Boerhevia diffusa based showed a potent anti-inflammatory effect.
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