Journal of Materials Science: Materials in Electronics
Powder samples of calcium yttrium silicate, Ca3Y2(Si3O9)2:xCe3+\documentclass[12pt]{minimal} \use... more Powder samples of calcium yttrium silicate, Ca3Y2(Si3O9)2:xCe3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{Ca}}_{3} {\text{Y}}_{2} ({\text{Si}}_{3} {\text{O}}_{9} )_{2} :x{\text{Ce}}^{{3 + }}$$\end{document}(x=0,0.01,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(x=0,{~}0.01,$$\end{document}0.02,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.02,$$\end{document}0.04,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.04,$$\end{document}0.08\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.08$$\end{document}, and 0.16mol%)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.16{\text{ mol}}\% )$$\end{document}, were prepared by a solution combustion technique using CaNO3,YNO3,TEOS\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text{CaN}{\text{O}_3},\text{YN}{\text{O}_3},\text{TEOS}$$\end{document} and Urea as a starting materials. X-ray diffraction (XRD) results show monoclinic phase of the samples and the diffraction peaks match well with the standard JCPDS card (PDF#87–0459). The photoluminescence (PL) emission spectra of the doped samples monitored at excitation wavelength of 365 nm show a broad band extending from about 350 to 600 nm and this band can be ascribed to the allowed Xe5d1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\left[ {{\text{Xe}}} \right]5{\text{d}}^{1} {\text{~}}$$\end{document} to Xe4f1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\left[ {{\text{Xe}}} \right]4{\text{f}}^{1} {\text{~}}$$\end{document} transition of Ce3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{Ce}}^{{3 + }}$$\end{document}. Moreover, the PL intensity increased for up to critical concentration of x=0.08\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$x=0.08$$\end{document} mol% and then decreased. The reflectance spectra of the doped samples show a red shift in their optical band gap as compared to the host. The Thermoluminescence (TL) properties of the host material (x=0\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$x=0$$\end{document} mol%) shows increment in the intensity of the glow curves for all the UV-doses applied. For the host, important TL kinetic parameters such as the activation energy (E), the frequency factor (s), and the order of kinetics (b) were determined by employing peak shape method. The introduction of Ce3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{Ce}}^{{3 + }}$$\end{document} in to the host material completely changed the TL properties of the samples.
The dispersion properties of structured metamaterials consisting of strips of a copper wire (elec... more The dispersion properties of structured metamaterials consisting of strips of a copper wire (electron subsystem) and square copper split-ring resonators (magnetic subsystem) with different and coinciding resonant frequencies are studied. In a narrow frequency band above the resonant frequency of the electron subsystem, the structured metamaterial is described by a negative refractive index. In addition to this, there are some peculiar properties observed in these metamaterials. Among these properties is the nonanalytic behavior of the real part of the refractive index as a function of the frequency with a discontinuity of its derivative in the metamaterial with two resonances. It is also shown that the superluminal, slow, and backward microwaves can exist in the structured metamaterials. However, in the absence of gain components, only the slow microwaves can propagate considerably.
A 72-year-old right-handed woman presented with a 6-month history of right thoracic wall discomfo... more A 72-year-old right-handed woman presented with a 6-month history of right thoracic wall discomfort. An MRI of the thoracic spine showed a small dumbbell-shaped mass centered within the right T7-8 foramen. The patient was asked to return to clinic for reevaluation to include a new MRI of the thoracic spine in 6 months. She did not comply with this recommendation and 1 year later, she presented with increasing difficulty ambulating and spastic paraparesis. A follow-up MRI of the thoracic spine now demonstrated significant interval growth of the mass with an extra-foraminal component extending into the thoracic cavity. She was taken to the operating room for resection of the epidural tumor. The pathology was consistent with diffuse follicle center lymphoma as cells were immunohistologically positive for CD20, CD 10, BCL-2 and BCL-6. Primary spinal follicle center lymphomas of the spine are rare with the current case being the first diffuse follicle center type reported in the literature.
... Conclusion Page 10. 10 1 The author greatly benefited from the comments of Dr Solomon Ayele D... more ... Conclusion Page 10. 10 1 The author greatly benefited from the comments of Dr Solomon Ayele Dersso, Mehari Tadele Maru, Roba Sharamo, Alemayehu Fayera and Wondwosen Michago, each of whom read in depth earlier versions of the report. ...
Near-drowning predisposes one to infection by the fungus Scedosporium apiospermum, and brain absc... more Near-drowning predisposes one to infection by the fungus Scedosporium apiospermum, and brain abscess is the most common consequence. Vertebral osteomyelitis due to this organism is exceedingly rare. The authors report on a 43-year-old man who developed fungal spondylodiscitis several weeks after a near-drowning event. The rare nature of this infection led to a delay in diagnosis. A combination of surgical debridement, instrumentation, and antifungal therapy resulted in an excellent outcome at 1 year of follow-up.
Alpha-fetoprotein (AFP) is a major serum protein produced during fetal development. Experimental ... more Alpha-fetoprotein (AFP) is a major serum protein produced during fetal development. Experimental findings suggest that AFP has antiestrotrophic activity and that it can be developed as a therapeutic agent to treat existing estrogen-dependent breast cancer or to prevent premalignant foci from developing into breast cancer. The antiestrotrophic activity of AFP was reported to be localized to a peptide consisting of amino acids 447^480, a 34-mer peptide termed P447. A series of parsings and substitutions of amino acids in the P447 sequence was intended to identify the shortest analog which retained antiestrotrophic activity. Peptides related to P447 were generated using solid phase peptide synthesis. Several shorter peptides, including an 8-mer called P472-2 (amino acids 472^479, peptide sequence EMTPVNPG), retained activity, whereas peptides shorter than eight amino acid residues were inactive. The dose-related antiestrotrophic activity of AFP-derived peptides was determined in an immature mouse uterine growth assay that measures their ability to inhibit estradiolstimulated uterine growth. In this assay, the maximal inhibitory activities exhibited by peptide P472-2 (49%), by peptide P447 (45%), and by intact AFP (35^45%) were comparable. The octapeptide P472-2 was also active against estradiol-stimulated growth of T47D human breast cancer cells in culture. These data suggest that peptide P472-2 is the minimal sequence in AFP, which retains the antiestrotrophic activity found with the full-length molecule. The synthetic nature and defined structure of this 8-mer peptide suggest that it can be developed into a new drug which opposes the action of estrogen, perhaps including the promotional effects of estradiol in the development of human breast cancer.
Journal of Materials Science: Materials in Electronics
Powder samples of calcium yttrium silicate, Ca3Y2(Si3O9)2:xCe3+\documentclass[12pt]{minimal} \use... more Powder samples of calcium yttrium silicate, Ca3Y2(Si3O9)2:xCe3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{Ca}}_{3} {\text{Y}}_{2} ({\text{Si}}_{3} {\text{O}}_{9} )_{2} :x{\text{Ce}}^{{3 + }}$$\end{document}(x=0,0.01,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$(x=0,{~}0.01,$$\end{document}0.02,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.02,$$\end{document}0.04,\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.04,$$\end{document}0.08\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.08$$\end{document}, and 0.16mol%)\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$0.16{\text{ mol}}\% )$$\end{document}, were prepared by a solution combustion technique using CaNO3,YNO3,TEOS\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\text{CaN}{\text{O}_3},\text{YN}{\text{O}_3},\text{TEOS}$$\end{document} and Urea as a starting materials. X-ray diffraction (XRD) results show monoclinic phase of the samples and the diffraction peaks match well with the standard JCPDS card (PDF#87–0459). The photoluminescence (PL) emission spectra of the doped samples monitored at excitation wavelength of 365 nm show a broad band extending from about 350 to 600 nm and this band can be ascribed to the allowed Xe5d1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\left[ {{\text{Xe}}} \right]5{\text{d}}^{1} {\text{~}}$$\end{document} to Xe4f1\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$\left[ {{\text{Xe}}} \right]4{\text{f}}^{1} {\text{~}}$$\end{document} transition of Ce3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{Ce}}^{{3 + }}$$\end{document}. Moreover, the PL intensity increased for up to critical concentration of x=0.08\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$x=0.08$$\end{document} mol% and then decreased. The reflectance spectra of the doped samples show a red shift in their optical band gap as compared to the host. The Thermoluminescence (TL) properties of the host material (x=0\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$x=0$$\end{document} mol%) shows increment in the intensity of the glow curves for all the UV-doses applied. For the host, important TL kinetic parameters such as the activation energy (E), the frequency factor (s), and the order of kinetics (b) were determined by employing peak shape method. The introduction of Ce3+\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$${\text{Ce}}^{{3 + }}$$\end{document} in to the host material completely changed the TL properties of the samples.
The dispersion properties of structured metamaterials consisting of strips of a copper wire (elec... more The dispersion properties of structured metamaterials consisting of strips of a copper wire (electron subsystem) and square copper split-ring resonators (magnetic subsystem) with different and coinciding resonant frequencies are studied. In a narrow frequency band above the resonant frequency of the electron subsystem, the structured metamaterial is described by a negative refractive index. In addition to this, there are some peculiar properties observed in these metamaterials. Among these properties is the nonanalytic behavior of the real part of the refractive index as a function of the frequency with a discontinuity of its derivative in the metamaterial with two resonances. It is also shown that the superluminal, slow, and backward microwaves can exist in the structured metamaterials. However, in the absence of gain components, only the slow microwaves can propagate considerably.
A 72-year-old right-handed woman presented with a 6-month history of right thoracic wall discomfo... more A 72-year-old right-handed woman presented with a 6-month history of right thoracic wall discomfort. An MRI of the thoracic spine showed a small dumbbell-shaped mass centered within the right T7-8 foramen. The patient was asked to return to clinic for reevaluation to include a new MRI of the thoracic spine in 6 months. She did not comply with this recommendation and 1 year later, she presented with increasing difficulty ambulating and spastic paraparesis. A follow-up MRI of the thoracic spine now demonstrated significant interval growth of the mass with an extra-foraminal component extending into the thoracic cavity. She was taken to the operating room for resection of the epidural tumor. The pathology was consistent with diffuse follicle center lymphoma as cells were immunohistologically positive for CD20, CD 10, BCL-2 and BCL-6. Primary spinal follicle center lymphomas of the spine are rare with the current case being the first diffuse follicle center type reported in the literature.
... Conclusion Page 10. 10 1 The author greatly benefited from the comments of Dr Solomon Ayele D... more ... Conclusion Page 10. 10 1 The author greatly benefited from the comments of Dr Solomon Ayele Dersso, Mehari Tadele Maru, Roba Sharamo, Alemayehu Fayera and Wondwosen Michago, each of whom read in depth earlier versions of the report. ...
Near-drowning predisposes one to infection by the fungus Scedosporium apiospermum, and brain absc... more Near-drowning predisposes one to infection by the fungus Scedosporium apiospermum, and brain abscess is the most common consequence. Vertebral osteomyelitis due to this organism is exceedingly rare. The authors report on a 43-year-old man who developed fungal spondylodiscitis several weeks after a near-drowning event. The rare nature of this infection led to a delay in diagnosis. A combination of surgical debridement, instrumentation, and antifungal therapy resulted in an excellent outcome at 1 year of follow-up.
Alpha-fetoprotein (AFP) is a major serum protein produced during fetal development. Experimental ... more Alpha-fetoprotein (AFP) is a major serum protein produced during fetal development. Experimental findings suggest that AFP has antiestrotrophic activity and that it can be developed as a therapeutic agent to treat existing estrogen-dependent breast cancer or to prevent premalignant foci from developing into breast cancer. The antiestrotrophic activity of AFP was reported to be localized to a peptide consisting of amino acids 447^480, a 34-mer peptide termed P447. A series of parsings and substitutions of amino acids in the P447 sequence was intended to identify the shortest analog which retained antiestrotrophic activity. Peptides related to P447 were generated using solid phase peptide synthesis. Several shorter peptides, including an 8-mer called P472-2 (amino acids 472^479, peptide sequence EMTPVNPG), retained activity, whereas peptides shorter than eight amino acid residues were inactive. The dose-related antiestrotrophic activity of AFP-derived peptides was determined in an immature mouse uterine growth assay that measures their ability to inhibit estradiolstimulated uterine growth. In this assay, the maximal inhibitory activities exhibited by peptide P472-2 (49%), by peptide P447 (45%), and by intact AFP (35^45%) were comparable. The octapeptide P472-2 was also active against estradiol-stimulated growth of T47D human breast cancer cells in culture. These data suggest that peptide P472-2 is the minimal sequence in AFP, which retains the antiestrotrophic activity found with the full-length molecule. The synthetic nature and defined structure of this 8-mer peptide suggest that it can be developed into a new drug which opposes the action of estrogen, perhaps including the promotional effects of estradiol in the development of human breast cancer.
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