7 resultados para Red Light Laughter
em Deakin Research Online - Australia
Resumo:
When aqueous sodium borohydride (50 mM) is added to a solution of potassium permanganate (1mM, in sodium hexametaphosphate) at acidic pH, bright red-orange emission is easily visible in a darkened room. This chemiluminescence emission is due to an excited state of manganese (II) that undergoes solution phase phosphorescence and provides an excellent opportunity for students to explore the relationship between the initial oxidation state of the manganese and the likelihood of luminescence. Not surprisingly Mn(VII), Mn(IV) and Mn(III) all give rise to chemiluminescence where as Mn(II) fails to react.
Resumo:
A two-factor experiment was performed to evaluate the effects of cage colour (black or white 0.5 m3 experiment cages) and light environment (natural sunlight or reduced level of natural sunlight) on the skin colour of darkened Australian snapper. Each treatment was replicated four times and each replicate cage was stocked with five snapper (mean weight=351 g). Snapper exposed to natural sunlight were held in experimental cages located in outdoor tanks. An approximately 70% reduction in natural sunlight (measured as PAR) was established by holding snapper in experimental cages that were housed inside a 'shade-house' enclosure. The skin colour of anaesthetized fish was measured at stocking and after a 2-, 7- and 14-day exposure using a digital chroma-meter (Minolta CR-10) that quantified skin colour according to the L*a*b* colour space. At the conclusion of the experiment, fish were killed in salt water ice slurry and post-mortem skin colour was quantified after 0.75, 6 and 22 h respectively. In addition to these trials, an ad hoc market appraisal of chilled snapper (mean weight=409 g) that had been held in either white or in black cages was conducted at two local fish markets. Irrespective of the sampling time, skin lightness (L*) was significantly affected by cage colour (P<0.05), with fish in white cages having much higher L* values (L*≈64) than fish held in black cages (L*≈49). However, the value of L* was not significantly affected by the light environment or the interaction between cage colour and the light environment. In general, the L* values of anaesthetized snapper were sustained post mortem, but there were linear reductions in the a* (red) and b* (yellow) skin colour values of chilled snapper over time. According to the commercial buyers interviewed, chilled snapper that had been reared for a short period of time in white cages could demand a premium of 10–50% above the prices paid for similar-sized snapper reared in black cages. Our results demonstrate that short-term use of white cages can reduce the dark skin colour of farmed snapper, potentially improving the profitability of snapper farming.
Resumo:
Contents: Cultural contexts. The light within : the 21st century love songs of Nick Cave / Jillian Burt ; Planting seeds / Clinton Walker ; Nick Cave and the Australian language of laughter / Karen Welberry ; Nick Cave, dance performance and the production of masculinity / Laknath Jayasinghe -- Intersections. An audience for antagonism / Chris Bilton ; And the ass saw the angel : a novel of fragment and excess / Carol Hart ; Red right hand : the cinema and Nick Cave / Adrian Danks ; Grinderman : all stripped down / Angela Jones -- The sacred. From mutiny to calling upon the author : Cave's religion / Robert Eaglestone ; Oedipus wrecks : Cave and the Presley myth / Nathan Wiseman-Trowse ; Fleshed sacred : the carnal theologies of Nick Cave / Lyn McCredden ; The moose and Nick Cave : melancholy, creativity and love songs / Tanya Dalziell.
Resumo:
Daniel Armstrong takes astronomical images of the southern sky. From these images each star is individually selected and mapped into grid like alignments and symmetrical shapes. The images present an optical play between structure and mapping.
Resumo:
The red-emitting phosphors Ca9Eu2W4O24 and Sr9Eu2W4O24 were synthesized by the solid-state reaction method. The crystal phases were characterized by X-ray powder diffraction. The photoluminescence excitation and emission spectra were investigated. The luminescence excitation and emission spectra confirm that the phosphors are efficiently excited by near UV light. The dependence of luminescence intensities on the heating temperatures was investigated. The Ca9Eu2W4O24 phosphor exhibits higher thermal stability than that of Sr9Eu2W4O24. The crystallographic sites for Eu3+ ions in Ca9Eu2W4O24 and Sr9Eu2W4O24 are investigated by the site-selective excitation spectra in the 5D0 → 7F0 wavelength region. It is identified that the Eu3+ ions occupy only M sites (statistically occupied by 0.5Eu and 0.5Ca) in Ca9Eu2W4O24 and, however, the Eu3+ ions can substitute both M sites (Eu3+ + Sr2+) and Sr2+ sites in Sr9Eu2W4O24. The luminescence spectra and the thermal stability are discussed on the basis of the crystal structure, Eu3+ site-distributions and the energy transfer.
Resumo:
© 2014 The Textile Institute. This study intends to enhance the functionality of titanium dioxide (TiO