This research synthesised zinc oxide (ZnO) structure by a hydrothermal method. ZnO samples were prepared using different molarities of (Zn) precursor, ranging from 0.10 to 0.16 M. Structural and morphological properties characterised X-ray diffraction (XRD) scanning electron microscopy (SEM). The XRD patterns show that all are prominently grown along the three peaks at (001), (002) (101) planes...

The present study compared two heating methods currently used for antigen retrieval (AR) immunostaining: the microwave oven and the steam cooker. Myosin-V, a molecular motor involved in vesicle transport, was used as a neuronal marker in honeybee Apis mellifera brains fixed in formalin. Overall, the steam cooker showed the most satisfactory AR results. At 100 ºC, tissue morphology was maintaine...

Solutions of sodium bicarbonate, calcium chloride, ethanol, acetic acid, and methanol, in concentrations ranging from 10−7 to 0.1 molar, were frozen under controlled conditions to measure the dependence of ice-spike formation on chemical impurities in water. The probability of ice-spike formation was plotted against molarity of solution to determine general trends for different solutes. The var...

The conductance o f N al in acetonitrile-water mixtures was measured at 25.000 ± 0.001 °C for the whole com position range o f the mixed solvent, the salt molarity ranging from 5 • 10“ 5 to 1 • 10-2 . Using the Fuoss-Hsia equation with the Femandez-Prini parameters, the association constants were computed for several values o f the ion-ion distances. The influence o f the mixed solvent composit...

The suggestion by Fersht [(1974) Proc. R. Soc. London Ser. B 187, 397-407] that enzymes that provide maximal rates of catalysis should be characterized by values of Ks, the dissociation constant of the enzyme-substrate complex, greater than 10 times the value of the ambient substrate concentration has been examined. 2. For such enzymes, Ks is not relevant, and attention is best focused on the r...

owing to its higher molarity. The amylopectin which accompanies it,into the infusion, amylopectin I, gave much lower blue values with iodine than the other preparations, and indeed resembled in this respect the best preparation otherwise obtained. It can scarcely be representative of the amylopectin of potato starch, and presumably consists of the smaller or less complex molecules. It is worthy...