Previous work has shown (1) that the passage of a constant, positive electric current through an onion root (a) increased the positivity of the observed' electric potential when the current was sent up the root (polarization) and (b) decreased the observed potential when the current was sent down the root (depolarization). This confirmeds earlier observations by MARSH (11) and was in agreement ...

Information on the tiller development of hybrid bromegrass (Bromus inermis × Bromus riparius Rehm) is limited. The objective this study was to evaluate effect clipping frequency at vegetative and reproductive stages concentrations sugars ‘AC Knowles’ compared ‘Kirk’ crested wheatgrass (Agropyron cristatum L.). This experiment conducted in greenhouse using tillers vernalized plants dug from fiel...

Excited state interactions of zeolite adsorbed porphyrins have been investigated by steady luminescence quenching technique with certain antioxidants such as reduced glutathione, ascorbic acid and L-cysteine. The supported porphyrins, meso-tetra (N-methyl-4-pyridyl) porphyrin (H2TMPyP4+) zinc tetra(N-methyl-4-pyridyl) (ZnTMPyP4+) were prepared characterized various techniques Diffuse Reflectanc...

NCHSR is partially funded by the Australian Department of Health and Ageing. © 2010 National Centre in HIV Social Research, The University of New South Wales Photographs on pages 1, 3 and 4 copyright iStockphoto What we see depends mainly on what we look for, or so John Lubbock (1834– 1913), a noted anthropologist, once said. In the field of HIV research and care what we don’t look for, we miss...

The active growth of available online learning programmes has created a wide range of new possibilities for global organizations to effectively train their staff. Previously, global training was related to substantial costs for organizations that had to be endured in order to update their knowledge and skills of the workforce. In this context, (virtual) Communities of Learning (CoL), defined as...

Intensity fluctuations between an ON-state and an OFF-state, also called blinking, are common to all luminescent objects when studied at the level of individuals. We studied blinking of three dyes from a homologous series (Cy3, Cy5, Cy7). The underlying radical anion states were induced by removing oxidants (i.e. oxygen) and by adding the reductant ascorbic acid. We find that for different cond...

SCHWARTZ, MANUEL, HERBERT K. KASHIWA, AHREN JACOBSON, AND WARREN S. REHM. Concentration and locali<ation of calcium in frog gastric mucosa. Am. J. Physiol. 2 12(2) : 241246. I g67.-Removal of Ca $3from the solutions bathing the frog gastric mucosa results in an initial increase in resistance (first phase) and a decrease in the H+ secretory rate of about 4oy0. These effects are followed by a pro...