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ABSTRACT: A comparative examination of the rates of respiration of dwarf and normal internodal segments was undertaken. The results indicated that on a fresh weight basis respiration was faster in the normal variety than in the dwarf.A comparison of the mitochondrial respiration, using succinate and reduced nicotinamide adenine dinucleotide (NADH) as substrates, showed that mitochondria from the normal variety had significantly higher phosphate to oxygen (P:O) and respiratory control (RC) ratios than mitochondria from the dwarf. It was suggested that the stature of the dwarf variety was a result of a lower energy status and that mitochondria from the dwarf plant may be partially uncoupled.
Canadian Journal of Botany 01/2011; 52(4):845-848. · 1.40 Impact Factor
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ABSTRACT: We have used time-resolved x-ray magnetic circular dichroism combined with photoemission electron microscopy (XMCD-PEEM) to
investigate the layer-resolved microscopic magnetization reversal in FeNi/X/Co (with X=Cu, Al2O3) trilayer systems. These measurements were performed in pump-probe mode, synchronizing magnetic pulses with synchrotron x-ray
pulses. The good magnetic contrast observed for most samples reveals that in many cases the magnetization reversal is reproducible.
We have used the measurements to obtain domain wall propagation speeds as a function of applied magnetic field, and to investigate
the influence of domain wall interactions on the magnetic switching.
Applied Physics A 07/2008; 92(3):505-510. · 1.63 Impact Factor
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M. Pardede,
R. Hedwig,
M.M. Suliyanti,
Z.S. Lie,
T.J. Lie,
D.P. Kurniawan,
K.H. Kurniawan,
M. Ramli, K. Fukumoto,
H. Niki,
S.N. Abdulmadjid,
N. Idris,
T. Maruyama,
K. Kagawa,
M.O. Tjia
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ABSTRACT: An experimental study has been performed to demonstrate the advantage of employing ambient helium gas in the spectral quality
improvement of hydrogen emission in laser-induced plasma from zircaloy-2 samples at both atmospheric and low gas pressure.
It was further shown that the optimal results achieved in the two pressure regimes require the adoption of different sets
of experimental parameters consisting of the laser energy, the focusing lens position and the detection gate delay. A strictly
linear calibration line with extrapolated zero intercept was nevertheless exhibited in the case of atmospheric gas pressure
only. Additional time-evolution measurement of the emission intensities of hydrogen, helium and zirconium clearly suggests
a distinctly different excitation mechanism for hydrogen atoms associated with the presence of ambient helium atoms and their
meta-stable excited state.
Applied Physics B 10/2007; 89(2):291-298. · 2.19 Impact Factor
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Journal of Magnetism and Magnetic Materials - J MAGN MAGN MATER. 01/2005; 293(3):863-871.
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ABSTRACT: Significant decrease of serum vitamin A (V.A) level in 4 out of 5 Japanese Black beef steers on day 7 after introduction was described in the present study. The feeder steers were fed the diets containing much more V.A than they required. In the farm where they were introduced, the productivity was high and the frequency was low in bovine cases of death and disease. The herd management; i.e. feeding method and environment of the farm were properly arranged. Results obtained from blood serum analyses revealed that health and nutritional status of the feeder steers were good on the day of introduction. The feeder steers, clinically healthy on the day of introduction, manifested mild bronchitis and diarrhea on days 2 and 10 after introduction, respectively, and slightly decreased dietary intake on both days. Serum V.A levels of the feeder steers were within the normal range. However, significantly decreased serum V.A level was detected in 4 feeder steers out of 5 on day 7 after introduction. This may be attributed to stress-increased V.A consumption rather than the decreased V.A intake.
Journal of Veterinary Medical Science 02/1998; 60(1):101-2. · 0.85 Impact Factor
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ABSTRACT: Mitochondria from dwarf and tall light-grown peas have been separated from contaminating chloroplasts and other organelles
on discontinuous sucrose gradients. A comparison between activities of the mitochondria from the two cultivars of light-grown
pea seedlings was made. It was observed that both respiratory control (R.C.) indices and phosphate to oxygen (P : O) ratios
were superior in mitochondria from the tall cultivar than the dwarf cultivar. The results are discussed in relation to energy
status and possible gibberellic acid content in the two cultivars.
Biologia Plantarum 04/1977; 19(1):53-58. · 1.97 Impact Factor
