SUMMARY Preilluminated spinach chloroplasts and Chlorella pyrenoidosa, when subjected to a quick temperature jump of about 15 °, emit light. This thermoluminescence is observed both in normal and 3(3,4-dichlorophenyl)-l,l.dimethylurea.treated samples, but is absent when hydroxylamine is added to either of these samples. These results are explained in terms of a oack reaction of System II of pho...

The experiment was carried out to study the impact of chilling and night break on the flowering of ornamental plants in their off-season period. Larsenianthus careyanus (Benth.) W.J. Kress & Mood is a wild potential ornamental ginger naturally growing in the evergreen forest of North Eastern states of India was selected for the current study. The rhizomes were collected and stored at 15oC for 8...

The DC and RF electrical behavior of GeTebased RF switches was characterized in both ON and OFF states at temperatures ranging from 25 K to 375 K. ONstate current-voltage characteristics vary only weakly with temperature, exhibiting Ohmic behavior at all temperatures across the full voltage range measured. OFF-state current varies linearly with voltage at all measured fields for low temperature...

We report the fabrication, and electrical and optical characterization, of solution-liquid-solid (SLS) grown CdSe nanowire field-effect transistors. Ultrathin nanowires (7–12 nm diameters) with lengths between 1 $m and 10 $m were grown by the SLS technique. Al-CdSe-Al junctions are then defined over oxidized Si substrate using photolithography. The nanowires, which were very resistive in the da...

The conductivity of an Al0.24Ga0.76As/GaAs quantum well was studied as a function of the surface charge generated by electron bombardment of the sample in the absence of an externally applied surface electric field. Under a suitable rate of electron irradiation, it was possible to completely shut off the conductive channel, implying a surface density n = 2.5 × 10 el/cm. Light illumination quenc...

The low speed perfommlce of low stagger compressor bl&i.ng at three pitcbdchord ratlios-by-Two stages of low qeed, low stagger blading were tested &t man diameter pitc$/chord ratios of 0.43, 0.66 and C.34. Contmry to the indications of some earlier published work, t'nere was no si@ficant Pall-off in elYiciency at the lowest, pitching, and the trend of the performance was in line with that predi...

We discuss the derivation of Newtonian potentials in the framework of quantum field theory. We focus on two particular points: on long range forces i.e. forces which fall off as 1/rn being mediated by light quanta like neutrinos or Goldstone bosons and on possible temperature dependence of such forces arising in situations when the exchanged quanta are in a thermal heat bath. Examples of the la...

We consider Matrix theory compactified on T 3 and show that it correctly describes the properties of Schwarzschild black holes in 7 + 1 dimensions, including the energy–entropy relation, the Hawking temperature and the physical size, up to numerical factors of order unity. The most economical description involves setting the cut-off N in the discretized light-cone quantization to be of order th...