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Hydrothermal mineralization at Doma ov nad Byst icí in the Nízky Jeseník Uplands
Zimák J,Novotny P,Dobe? P
Bulletin of Geosciences , 2005, DOI: 10.3140/bull.geosci.2005.03.213
Abstract: Hydrothermal veins of the Alpine type, some of which contain sulphides of Cu, Pb, and Zn, cross-cut the Variscan flysch sequences (composed of sandstones, conglomerates, shales, and siltstones) in the Nízky Jeseník Uplands (in the NE part of the Bohemian Massif). Apart from numerous ore occurrences without economic significance, this mineralization also generated several ore deposits that were formerly worked mainly for silver and lead. Hydrothermal veins of differing type, composition, and age are abundant in the quarry at Doma ov nad Byst icí (north of a historical ore district in the Byst ice valley). The oldest of them are syntectonic veins (sometimes coarse-fibrous) composed mainly of quartz, calcite, and chlorite of the clinochlore-chamosite solid solution series; albite is sporadically present in the gangue. These veins do not contain sulphides aside from occasional pyrite. The study of primary fluid inclusions indicates solution concentrations of 15 to 23 wt.% NaCl equiv. At the studied locality, sulphides (pyrite, chalcopyrite, galena, sphalerite) occur in younger veins and veinlets composed mainly of quartz and carbonates (calcite, and minor carbonate of the dolomite-ankerite series). Three groups of fluid inclusions are distinguished based on the salinity of solutions trapped in the calcite and quartz (in wt.% NaCl equiv.) in the ranges of 17-22, 8-11, and 0.4-4.3. Homogenization temperatures of the fluid inclusions in calcite and quartz from both vein types range from 65-90 °C indicate relatively low precipitation temperatures. Thermometric data obtained by fluid inclusion techniques are not in agreement with the temperatures estimated from the chlorite compositional geothermometers that give temperatures corresponding to mesothermal conditions.
XML Multidimensional Modelling and Querying
Serge Boucher,Boris Verhaegen,Esteban Zimányi
Computer Science , 2009,
Abstract: As XML becomes ubiquitous and XML storage and processing becomes more efficient, the range of use cases for these technologies widens daily. One promising area is the integration of XML and data warehouses, where an XML-native database stores multidimensional data and processes OLAP queries written in the XQuery interrogation language. This paper explores issues arising in the implementation of such a data warehouse. We first compare approaches for multidimensional data modelling in XML, then describe how typical OLAP queries on these models can be expressed in XQuery. We then show how, regardless of the model, the grouping features of XQuery 1.1 improve performance and readability of these queries. Finally, we evaluate the performance of query evaluation in each modelling choice using the eXist database, which we extended with a grouping clause implementation.
The Gradient of γ-Rays Irradiation’s Energy and Its Use in Treatment of Cancer Diseases  [PDF]
Labinot Kastrati, Gazmend Nafezi, G?zim Shehi
International Journal of Medical Physics,Clinical Engineering and Radiation Oncology (IJMPCERO) , 2016, DOI: 10.4236/ijmpcero.2016.52016
Abstract: The Ionising irradiations used mostly in the treatment of tumoral diseasses are: X, γ, β and e irradiations. The discussion will be about γ irradiations, produced in linear accelerator with photon energy 6 MV and 15 MV. It is important to know the absorption performance before and after the electronic equilibrium. This is a reason that we’ve used the function of dose gradient for irradiations γ. It represents the velocity of dose change as a function of depth in tissue. From skin to maximum dose value, the increase of G-function is more accentuated for γ-rays than for β-particles while after that the G-function decreasing is less sharp for γ-rays. Finally, we’ll discuss about the advantages in terms of radiation protection of γ-rays used in radiotherapy.
Gaucher’s Disease in Albanian Children: Casuistics and Treatment
Behar Shehi,G?zim Bo?ari,Gentian Vyshka,Rezar Xhepa
Iranian Journal of Pediatrics , 2011,
Abstract: Objective:Gauchers disease is a rare genetic disorder that results in the accumulation of cerebrosides in the liver, spleen, kidneys, lungs, brain and bone marrow. The deficiency of the specific lysosomal enzyme glucocerebrosidase is considered as causative factor. The first effective treatment for the disease, the drug Ceredase, approved in 1995, was replaced in 2001 by the drug Cerezyme . Methods:During the period 2004-2009 in our service 11 children were hospitalized and treated for Gaucher's disease: 9 children with type 1, and 2 children with type 3 of the disease. The enzymatic examinations of the biomarker chitotriosidase were performed in Sahlgrens University Hospital, M lndal Sweden; the DNA analysis was performed in the Childrens Hospital & Regional Medical Center, Seattle, USA. Findings:We are presenting the biological and genetic molecular data of the children. In our case series, one year after the treatment started, the hemoglobin level was normalized; the platelet count was normalized in 7 patients after one year of treatment, and in 9 patients after two years of treatment. The hemorrhagic syndrome stopped after 6 months of treatment. Chitotriosidase values decreased 10-20 times the initial value, after one year of treatment and in one case the value reached the normal range. The treatment with Cerezyme has also improved the visceral and biological signs. Anomalies of the oculomotricity were less sensitive to the treatment. Conclusion:According to our experience, Chitotriosidase is a sensitive and specific marker in diagnosing and monitoring Gauchers disease. The enzyme replacement therapy through Cerezyme is an effective and safe treatment of Gauchers disease. Blood signs (anemia, platelet count); visceral signs (splenomegaly, hepatomegaly) as well as bone involvement showed decisive improvement under the therapy.
Transition-metal catalyzed synthesis of Ketoprofen
Ramminger Carolina,Zim Danilo,Lando Vanusa R.,Fassina Viviane
Journal of the Brazilian Chemical Society , 2000,
Abstract: Transition metal-catalyzed reactions including carbonylations, hydrovinylations and hydrogenations have been applied in the synthesis of alpha-(3-benzoylphenyl)propanoic acid (Ketoprofen). 3-Vinylbenzophenone was obtained from 3-bromobenzophenone by a Pd-catalyzed Heck coupling reaction. Pd-catalyzed carbonylation of this olefin gave the isopropyl alpha-(3-benzoylphenyl) propionate in high yield (95%) and with high regioselectivity (>99.5%). Ketoprofen was obtained in 90% yield by hydrolysis of the isopropyl ester. It was also obtained in two steps from 3-vinylbenzophenone by a Ni-catalyzed hydrovinylation selectively affording 3-(3'-benzoylphenyl)-1-butene, followed by an oxidation. 3-Ethynylbenzophenone was obtained from 3-bromobenzophenone by Pd-catalyzed coupling reaction. By means of a Pd-catalyzed carbonylation, this alkyne was converted regioselectively (97%) into methyl alpha-(3-benzoylphenyl) acrylate (93% yield). Hydrolysis of the ester afforded the alpha-(3-benzoylphenyl)acrylic acid. Asymmetric hydrogenation of this acid to give (S)-ketoprofen in 95% optical yield was achieved using a chiral Ru-(S)-BINAP catalyst.
Transition-metal catalyzed synthesis of Ketoprofen
Ramminger, Carolina;Zim, Danilo;Lando, Vanusa R.;Fassina, Viviane;Monteiro, Adriano L.;
Journal of the Brazilian Chemical Society , 2000, DOI: 10.1590/S0103-50532000000200002
Abstract: transition metal-catalyzed reactions including carbonylations, hydrovinylations and hydrogenations have been applied in the synthesis of a-(3-benzoylphenyl)propanoic acid (ketoprofen). 3-vinylbenzophenone was obtained from 3-bromobenzophenone by a pd-catalyzed heck coupling reaction. pd-catalyzed carbonylation of this olefin gave the isopropyl a-(3-benzoylphenyl) propionate in high yield (95%) and with high regioselectivity (>99.5%). ketoprofen was obtained in 90% yield by hydrolysis of the isopropyl ester. it was also obtained in two steps from 3-vinylbenzophenone by a ni-catalyzed hydrovinylation selectively affording 3-(3'-benzoylphenyl)-1-butene, followed by an oxidation. 3-ethynylbenzophenone was obtained from 3-bromobenzophenone by pd-catalyzed coupling reaction. by means of a pd-catalyzed carbonylation, this alkyne was converted regioselectively (97%) into methyl a-(3-benzoylphenyl) acrylate (93% yield). hydrolysis of the ester afforded the a-(3-benzoylphenyl)acrylic acid. asymmetric hydrogenation of this acid to give (s)-ketoprofen in 95% optical yield was achieved using a chiral ru-(s)-binap catalyst.
Potentiation of carbon tetrachloride hepatotoxicity by pentosan polysulfate in rats
Zim, M.C.A.;Silveira, T.R.;Schwartsmann, G.;Cerski, T.;Motta, A.;
Brazilian Journal of Medical and Biological Research , 2002, DOI: 10.1590/S0100-879X2002001100012
Abstract: few data are available in the literature regarding the effect of pentosan polysulfate (pps) on normal and fibrotic rat livers. in addition, the combination of pps and carbon tetrachloride (ccl4) has not been studied so far. the objective of this study was to assess the effect of pps on rat livers treated or not with ccl4 for the induction of liver fibrosis. the study consisted of four stages: 1) hepatic fibrosis induction with ccl4 (n = 36 rats); 2) evaluation of the effect of pps on ccl4-induced hepatic fibrosis (n = 36 rats); 3) evaluation of the effect of higher doses of pps in combination with ccl4 (n = 50 rats); 4) evaluation of the presence of an enzymatic inductor effect by pps (n = 18 rats) using the sodium pentobarbital test which indirectly evaluates hepatic microsomal enzyme activity in vivo. adult (60 to 70 days) male wistar rats weighing 180 to 220 g were used. all animals receiving 0.5 ml 8% ccl4 (n = 36) developed hepatic fibrosis, and after 8 weeks they also developed cirrhosis. no delay or prevention of hepatic fibrosis was observed with the administration of 5 mg/kg pps (n = 8) and 1 mg/kg pps (n = 8) 1 h after the administration of ccl4, but the increased hepatotoxicity resulting from the combination of the two substances caused massive hepatic necrosis in most rats (n = 45). pps (40 mg/kg) alone caused hepatic congestion only after 8 weeks, but massive hepatic necrosis was again observed in association with 0.5 ml ccl4 after 1 to 4 weeks of treatment. unexpectedly, sleeping time increased with time of pps administration (1, 2, or 3 weeks). this suggests that pps does not function as an activator of the hepatic microsomal enzymatic system. further studies are necessary in order to clarify the unexpected increase in hepatotoxicity caused by the combination of ccl4 and high doses of pps, which results in massive hepatic necrosis.
Potentiation of carbon tetrachloride hepatotoxicity by pentosan polysulfate in rats
Zim M.C.A.,Silveira T.R.,Schwartsmann G.,Cerski T.
Brazilian Journal of Medical and Biological Research , 2002,
Abstract: Few data are available in the literature regarding the effect of pentosan polysulfate (PPS) on normal and fibrotic rat livers. In addition, the combination of PPS and carbon tetrachloride (CCl4) has not been studied so far. The objective of this study was to assess the effect of PPS on rat livers treated or not with CCl4 for the induction of liver fibrosis. The study consisted of four stages: 1) hepatic fibrosis induction with CCl4 (N = 36 rats); 2) evaluation of the effect of PPS on CCl4-induced hepatic fibrosis (N = 36 rats); 3) evaluation of the effect of higher doses of PPS in combination with CCl4 (N = 50 rats); 4) evaluation of the presence of an enzymatic inductor effect by PPS (N = 18 rats) using the sodium pentobarbital test which indirectly evaluates hepatic microsomal enzyme activity in vivo. Adult (60 to 70 days) male Wistar rats weighing 180 to 220 g were used. All animals receiving 0.5 ml 8% CCl4 (N = 36) developed hepatic fibrosis, and after 8 weeks they also developed cirrhosis. No delay or prevention of hepatic fibrosis was observed with the administration of 5 mg/kg PPS (N = 8) and 1 mg/kg PPS (N = 8) 1 h after the administration of CCl4, but the increased hepatotoxicity resulting from the combination of the two substances caused massive hepatic necrosis in most rats (N = 45). PPS (40 mg/kg) alone caused hepatic congestion only after 8 weeks, but massive hepatic necrosis was again observed in association with 0.5 ml CCl4 after 1 to 4 weeks of treatment. Unexpectedly, sleeping time increased with time of PPS administration (1, 2, or 3 weeks). This suggests that PPS does not function as an activator of the hepatic microsomal enzymatic system. Further studies are necessary in order to clarify the unexpected increase in hepatotoxicity caused by the combination of CCl4 and high doses of PPS, which results in massive hepatic necrosis.
New Universality Class at the Superconductor--Insulator Transition
Karl-Heinz Wagenblast,Anne van Otterlo,Gerd Sch?n,Gergely T. Zimányi
Physics , 1996, DOI: 10.1103/PhysRevLett.78.1779
Abstract: We study dynamic properties of thin films near the superconductor - insulator transition. We formulate the problem in a phase representation. The key new feature of our model is the assumption of a {\it local} ohmic dissipative mechanism. Coarse graining leads to a Ginzburg-Landau description, with non-ohmic dynamics for the order parameter. For strong enough damping a new universality class is observed. It is characterized by a {\it non-universal} d.c. conductivity, and a damping dependent dynamical critical exponent. The formulation also provides a description of the magnetic field-tuned transition. Several microscopic mechanisms are proposed as the origin of the dissipation.
Reply to the Comment on 'Quantum Phase Slips and Transport in Ultra-Thin Superconducting Wires'
Andrei D. Zaikin,Dmitrii S. Golubev,Anne van Otterlo,Gergely T. Zimányi
Physics , 1997, DOI: 10.1103/PhysRevLett.78.1552
Abstract: We reply to the recent Comment [cond-mat/9702231] by J.-M. Duan. Our point of view is markedly different on every issue raised. Much of the disagreement can be traced to a different preception of experimentally relevant length scales. i) We explain the difference between our formulation, which rests on a microscopic basis, and the phenomenological one of the author. ii) Our renormalization scheme is fundamentally right, as the "log(log)" interaction appears only in wires of astronomical lengths. iii) The tunneling barrier is profoundly reduced by the kinetic inductance. iv) We do make an appropriate comparison to the data on the thinnest available wires.
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