165 research outputs found
Selective photo-oxidation of ethanol to acetaldehyde and acetic acid in water in presence of TiO2 and cupric ions under UV–simulated solar radiation
No full textThe selective oxidation of ethanol to acetaldehyde and acetic acid in aqueous solution, through sacrificial TiO2 photocatalysis in the presence of cupric ions at ambient temperature, under acidic conditions and artificial sunlight, has been investigated. Different commercial TiO2 photocatalyst samples and loads have been tested. The influence of starting cupric ion and ethanol concentrations has been investigated. Ethanol conversion, overall product selectivity, and product yield have been calculated and compared with the aim of maximizing the recovery of valuable commodity chemicals. For the run corresponding to optimal values of ethanol conversion, overall product selectivity and yields, a value of process photoefficiency equal to 33% has been calculated. Based on the experimental results, the main focus of the study has been the development of a photo-oxidation mechanism and a new kinetic model constituted by a set of mass balance equations for the main species involved in the photocatalytic oxidation process. The model has been employed for analyzing data collected at different starting substrates and cupric ion concentrations. A reliable prediction of the concentrations of cupric ions and organic species during selective photo-oxidation runs has been achieved. The modeling investigation has allowed to estimate for the first time the kinetic parameters not available in the literature review, such as the equilibrium adsorption constants and the rate constants for the hole-capture by sacrificial agents. A new alternative strategy to convert ethanol from biorefinery wastewaters into valuable fine chemicals, by using water as solvent, a low-cost catalyst, solar radiation and ambient temperature, has been proposed and kinetically characterized. The model presented can be easily applied to other photocatalytic systems for the oxidation of organic species over metal doped photocatalysts
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Black American Law Students Association: Pro... And Con... (The Advocate)
No full textEditorial page of the 12-21-1973 Advocate with Pro and Con essays by Kenneth J. Uva (pro) and Jacob Apuzzo (con) regarding BALSA\u27s budget proposals, with a Postscript reporting the SBA\u27s decisions.
Also a handwritten draft of Eugene Oliver, Jr.\u27s reply to Jacob Apuzzo. (Note: includes an explanation of why BALSA\u27s Law Day was on Oct. 27th.)https://ir.lawnet.fordham.edu/blsa/1001/thumbnail.jp
Black American Law Students Association: Pro... And Con... (The Advocate)
No full textEditorial page of the 12-21-1973 Advocate with Pro and Con essays by Kenneth J. Uva (pro) and Jacob Apuzzo (con) regarding BALSA\u27s budget proposals, with a Postscript reporting the SBA\u27s decisions.
Also a handwritten draft of Eugene Oliver, Jr.\u27s reply to Jacob Apuzzo. (Note: includes an explanation of why BALSA\u27s Law Day was on Oct. 27th.)https://ir.lawnet.fordham.edu/blsa/1001/thumbnail.jp
Interventions in the new political geographies of the European 'neighborhood'
No full textThis series of interventions assesses the role of EU foreign policy in its various 'Neighbourhoods', noting the emergence of the EU as a geopolitical actor
Folyóirat-referátumok = From the literature
No full textNanomedicina:
1. J. B. Elder - C. Y. Liu - M. L. J. Apuzzo: Idegsebészet a 10–9 birodalomban, 2. rész: A nanotechnológia alkalmazásai az idegsebészetben – jelen és jövő = Neurosurgery in the realm of 10–9, Part 2: Applications of nanotechnology to neurosurgery – present and future
Neonatológia:
1. M. E. Norton: Az iker-iker transzfúziós szindróma megítélése és kezelése: még mindig kihívás = Evaluation and
management of twin-twin transfusion syndrome: still a
challeng
CXCR4 antibody treatment suppresses metastatic spread to the lung of intratibial human osteosarcoma xenografts in mice
No full textCurrent combined surgical and neo-adjuvant chemotherapy of primary metastatic osteosarcoma (OS) is ineffective, reflected by a 5-year survival rate of affected patients of less than 20 %. Studies in experimental OS metastasis models pointed to the CXCR4/CXCL12 homing axis as a novel target for OS metastasis-suppressive treatment. The present study investigated for the first time the CXCR4-blocking principle in a spontaneously metastasizing human 143B OS cell line-derived orthotopic xenograft mouse model. The highly metastatic 143B cells, unlike the parental non-metastatic HOS cells, express functional CXCR4 receptors at the cell surface, as revealed in this study by RT/PCR of gene transcripts, by FACS analysis with the monoclonal anti CXCR4 antibody 12G5 (mAb 12G5) and by CXCL12 time- and dose-dependent stimulation of AKT and ERK phosphorylation. A significantly (p < 0.05) higher CXCL12 dose-dependent chemotactic response of 143B compared to HOS cells in a Boyden chamber trans-well migration assay suggested a crucial role of the CXCL12/CXCR4 homing axis in 143B cell lung metastasis. Repetitive treatment of mice with 143B cell-derived intratibial tumors given intravenous bolus injections of mAb12G5 indeed inhibited significantly (p < 0.01) the number of X-gal-stainable lung micrometastases of lacZ-transduced 143B cells. Antibody treatment had also a mild inhibitory effect on primary tumor growth associated with remarkably less osteolysis, but it did not affect the number of developing lung macrometastases. In conclusion, these results demonstrate considerable potential of high-affinity CXCR4-blocking agents for OS tumor cell homing suppressive treatment in metastasizing OS complementary to current (neo)-adjuvant chemotherapy
Integrated plasmonic dimers: a platform for ultra-efficient trapping of nanoparticles
No full textIn this contribution, the efficient trapping of low refractive index nanoparticles, with radii down to 50 nm, is numerically demonstrated in gold dimers coupled with SOI waveguides. This coupled scheme provides a strong excitation of the plasmonic resonators [1] that, in combination with the field enhancement occurring in dimers, leads to an ultra-efficient trapping. Without any needs of cumbersome optical elements, this excitation scheme does not affect the overall portability of the system and stands out as a perfect candidate for integration inside microfluidic systems [2], for nanoparticle immobilisation and analysis. The possibility to trap smaller nanoparticle, with radii down to 5 nm, having higher refractive index will be discussed. The impact of the geometrical parameters of the dimer on the optomechanical well stiffness and depth, the optimisation strategies, the simple fabrication approach and the ongoing experimental demonstration will be as well detailed. [1] M. Fevrier, P. Gogol, A. Aassime, R. Megy, C. Delacour, A. Chelnokov, A. Apuzzo, S. Blaize, J.-M. Lourtioz et B. Dagens, ≪Giant Coupling Effect between Metal Nanoparticle Chain and Optical Waveguide,≫ Nano Letters, pp. 1032-1037, 2012. [2] G. Magno, A. Ecarnot, C. Pin, V. Yam, P. Gogol, R. Megy, B. Cluzel et B. Dagens, ≪Integrated plasmonic nanotweezers for nanoparticle manipulation,≫ Optics Letters, vol. 41, n° 16, 2016
Applications of augmented reality in the neurosurgical operating room: A systematic review of the literature
No full textAdvancements in imaging techniques are key forces of progress in neurosurgery. The importance of accurate visualization of intraoperative anatomy cannot be overemphasized and is commonly delivered through traditional neuronavigation. Augmented Reality (AR) technology has been tested and applied widely in various neurosurgical subspecialties in intraoperative, clinical use and shows promise for the future. This systematic review of the literature explores the ways in which AR technology has been successfully brought into the operating room (OR) and incorporated into clinical practice. A comprehensive literature search was performed in the following databases from inception-April 2020: Ovid MEDLINE, Ovid EMBASE, and The Cochrane Library. Studies retrieved were then screened for eligibility against predefined inclusion/exclusion criteria. A total of 54 articles were included in this systematic review. The studies were sub- grouped into brain and spine subspecialties and analyzed for their incorporation of AR in the neurosurgical clinical setting. AR technology has the potential to greatly enhance intraoperative visualization and guidance in neurosurgery beyond the traditional neuronavigation systems. However, there are several key challenges to scaling the use of this technology and bringing it into standard operative practice including accurate and efficient brain segmentation of magnetic resonance imaging (MRI) scans, accounting for brain shift, reducing coregistration errors, and improving the AR device hardware. There is also an exciting potential for future work combining AR with multimodal imaging techniques and artificial intelligence to further enhance its impact in neurosurgery
Paramedian Thalamic Syndrome (Percheron Revisited - With MR)
No full textDiplopia; ExotropiaA 26-year old male with intermittent diplopia from an exotropia, slightly greater at near than at distance.VA: 20/15 0UMRIParamedian thalamic infarctsAntineoplastic agents; XRT1. Castaigne P, Buge A, Cambier J, Escourolle R, Brunet P, Degos JO: Demence thalamique d\u27origine vasculaire par ramollissement bilateral, limite au territoire du pedicule retro-mamillaire. Rev Neurol (Paris) 114:89-107, 1966. 2. Chandrasoma PT, Smith MM, Apuzzo MLJ: Stereotactic biopsy in the diagnosis of brain masses: comparison of results of biopsy and resected surgical specimen. Neurosurgery 24:160-165, 1989. 3. Guberman A, Stuss D: The syndrome of bilateral paramedian thalamic infarction. Neurology 33:540-546, 1983. 4. Halmagyi GM, Evans WA, Hallinan JM: Failure of downward gaze. Arch Neurol 35:22-26, 1978. 5. Kageyama N: Ectopic pinealoma in the region of the optic chiasm: Report of five cases. J Neurosurg 35:755-759, 1971. 6. Kageyama N, Belsky R: Ectopic pinealoma in the chiasmal region. Neurology 11:318-327, 1961. 7. Kilgore DP, Strother CM, Starshak RJ, Haughton VM: Pineal germinoma: MR imaging. Radiology 158:435-438, 1986. 8. Kobayashi T, Kageyama N, Kida Y, et al: Unilateral gerimonas involving the basal ganglia and thalamus. J Neurosurg 55:55-62, 1981. 9. Kobayashi T, Yoshida J, Kida Y: Bilateral germ cell tumors involving the basal ganglia and thalamus. Neurosurgery 24:579-583, 1989. 10. Muller-Forel1 W, Schroth G, Egan PJ: MR imaging in tumors of the pineal region. Neuro-radiology 30:224-231, 1988. 11. Percheron G: Les arteres du thalamus humain: II. Arteres et territoires thai ami ques paramedians de l\u27artere basilaire communicante. Rev Neurol (Paris) 132:309-324, 1976. 12. Swischuk LE, Bryan R0: Double midline intracranial atypical teratomas. Am 0 Radiol 122:517-524, 1974. 13. Trojanowski JQ, Wray SH. Vertical gaze ophthalmoplegia: selective paralysis of downgaze. Neurology (NY) 30:605-610, 1980. 14. Watrie K: Tumours in the pineal and supra-sellar region. A review of clinical manifestations and managements. J Neuro-Oncology 4:17-21, 1986
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