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Solitary bone cysts are benign, fluid-filled cavities that most often
occur in childhood. Several minimally invasive decompression methods have
been proposed; however, performing a surgical procedure through the thinned
overlying cortex raises the risk of pathological fracture and neurovascular
damage, especially in lesions located in the bone diaphysis. We describe a new
technique that circumvents these problems: tunneling through the normal cortex
and medullary space with a flexible reamer, placing a retrograde medullary
nail for cyst decompression.
A new, simple and fast separation method for Fe using an extraction chromatographic resin, Aliquat 336 (commercially available as TEVA resin) has been developed. A one milliliter column containing 0.33 mL TEVA resin on 0.67 mL CG-71C was used.Iron was adsorbed with 6mol·L-1 HCl + H2O2 on TEVA resin, and recovered with 2 mol·L-1HNO3. The recovery yield and total blank were 93.5 ± 6.5% and 6 ng, respectively. Theseparation method is simple, and takes < 2 hours. For evaluation of the Fe separation, Fe isotope ratios were measured by a double-spike method employing multicollector inductively coupled plasma source mass spectrometry (MC-ICP-MS) with repeatability of 0.06‰ (SD) for the standard solution and ~0.05‰ for the silicate samples. Therefore, the column chemistry developed in this study is a viable option for Fe isotope ratio measurement by MC-ICP-MS.
This study analyses the
dynamics of nonlinear monopoly. To this end, the conventional assumptions in
the text-book monopoly are modified; first, the complete information on the
market is replaced with the partial information; second, the instantaneous
information is substituted by the delay information. As a result, since such a
monopoly is unable to jump, with one shot, to the optimal point for which the
profit is maximized, the monopoly has to search for it. In a continuoustime
framework, the delay destabilizes the otherwise stable monopoly model and
generates cyclic oscillations via a Hopf bifurcation. In a discrete-time
framework, the steady state bifurcates to a bounded oscillation via a
Neimark-Sacker bifurcation. Although this has been only an introduction of
delay into the traditional monopoly model, it is clear that the delay can be a
source of essentially different behavior from those of the nondelay model.
Short Retraction Notice
This article has been retracted to straighten the academic record. In making this decision the Editorial Board follows COPE's Retraction Guidelines. The aim is to promote the circulation of scientific research by offering an ideal research publication platform with due consideration of internationally accepted standards on publication ethics. The Editorial Board would like to extend its sincere apologies for any inconvenience this retraction may have caused.
Editor guiding this retraction: Prof. Peter Walla (EiC of PSYCH)
The full retraction notice in PDF is preceding the original paper, which is marked \"RETRACTED\".