164 research outputs found
Den Tod Als eine der Vernunft höchst fürchterliche, Dem Glauben eines Christen aber sehr erfreuliche Sache, Wollte bey dem frühzeitigen, doch seligen Abschiede Der Weyland Hoch-Edlen, Hoch- Ehr- und Tugendbelobten Jungfer, Jungfer Dorothea Elisabeth Ritnern, Des Hoch-Ehrwürdigen und Hochgelahrten Herrn, Herrn Wilhelm Ritners S. S. Th. Licent. und treuwohlverdienten Past. Prim. an der hiesigen Hohen Stifts Kirche, wie auch wohl-meritirten Inspectoris der hiesigen Hohen Stifts-Schule ... Tochter, in nachgesezter Ode entwerfen ... J. C. W. Heike, der Weltweish. u. Gottesgelartheit Beflißner
No full textTrauergedicht auf Dorothea Elisabeth Rittner, Tochter des Pastors Wilhelm RittnerVorlageform des Erscheinungsvermerks: Halberstadt, druckts N. M. Lange. - Erscheinungsjahr nach Todesjahr bestimm
Innovative Reliable Nitride based Power Devices and Applications - The EU Public Funded Project InRel-NPower
No full textHalf-bridge Concepts for High Blocking Voltage GaN HEMT
No full textGaN power semiconductors with lower blocking voltages are well established meanwhile in low- and mid-power applications for highly efficient power conversion. However, especially for industrial and automotive drive inverters – in a power class of 20 kW up to 30 kW – semiconductor intrinsic normally-off characteristics for higher blocking voltages than 650 V under distinct elevated reliability levels are mandatory. As well, low-inductance power module design elements down to few nH are mandatory for the higher switching frequency ability and the steeper voltage and current gradients in comparison to Silicon power devices. Therefore the partner in the EU public funded project ‘InRel-NPower’ research on new robust and reliable GaN-on-Si devices for higher blocking voltages than 650 V – with respect to DC-link voltage levels towards 800 V – and assembly and interconnection technologies for low-inductance module concepts enabling those new devices towards system level
EVALUATION OF SPECTROSCOPIC CONSTANTS OF THE MODIFIED RITTNER POTENTIAL BY SIMON-PARR-FINLAN TECHNIQUE
No full textAuthor Institution:A critical examination of the Rittner potential is undertaken through the Simon-Parr-Finlan technique, including the contribution of the polarisability of ions and the Van der Waal’s term. We develop an equation for the SPF constants which are related to the spectroscopic constants and the polarisability of the constituent ions. Our analysis indicates an excellent agreement for dissociation energies of 20 alkali halides with the available experimental data. This analysis is therefore expected to yield satisfactory results for other spectroscopic constants. The paper also cites theoretical values of the SPF coefficients, namely, and for the 20 alkali halides, which compare favourable with the experimental data
Geochemical Characterization of Insoluble Particle Clusters in Ice Cores Using Two‐dimensional Impurity Imaging
No full textUnderstanding post-depositional processes altering the layer sequence in ice cores is especially needed to avoid misinterpretation of the oldest and most highly thinned layers. The record of soluble and insoluble impurities represents an important part of the paleoclimate proxies in ice cores but is known to be affected through interaction with the ice matrix, diffusion and chemical reactions. Laser ablation inductively-coupled plasma mass spectrometry (LA-ICP-MS) has been recognized for its micron-scale resolution and micro-destructiveness in ice core impurity analysis. Employing LA-ICP-MS for 2D chemical imaging has already revealed a close relationship between the ice grain boundary network and impurity signals with a significant soluble component, such as Na and Mg. Here we show the latest improvements in chemical imaging with LA-ICP-MS, by increasing the spatial resolution to 20 μm and extending the simultaneous analysis to also mostly insoluble impurities, such as Al and Fe. All analytes reveal signals of dispersed spots in a sample of an East Greenland ice core. Based on their average size around 50-60 times larger than an average particle and their heterogeneous elemental ratios these spots are interpreted as particle clusters. To distinguish their origin, a simple colocalization classification reveals elemental ratios consistent with marine and mineral dust aerosol. Based on already existing data from cryo-Raman spectroscopy, we discuss potential ways to integrate the two methods in a future comparison. Such a combined approach may help constraining post-depositional changes to the dust-related insoluble impurity components, such as cluster formation and chemical reactions at grain boundaries
Conformational And Electronic Interaction Studies Of Some P-substituted α-methylsulfonyl-α-diethoxyphosphorylacetophenones
No full textThe analysis of the IR carbonyl band of the α-methylsulfonyl-α-diethoxyphosphoryl p-substituted acetophenones p-Y-Ph-C(O)CH(SO2Me)[P(O)(OEt)2] (Y = OMe 1, H 2, F 3, Cl 4, Br 5 and NO2 6) supported by HF/6-31G(d,p) ab initio calculations of the α-methylsulfonyl-α-diethoxyphosphoryl acetophenone 2, indicated the existence of a single stable c1 conformer in gas phase and in solvents of increasing polarity, along with the presence of second less stable conformation in gas phase. The c1 conformer present the (SO2Me) group and the [P(O)(OEt2)] groups in a syn-clinal (gauche) geometry and is stabilised through of the Oδ-(CO)...Pδ+(PO), Oδ-[PO(OEt)]...Cδ+(CO), Oδ-(PO)...Cδ+(CO), Oδ-(CO)...Sδ+(SO2Me) and Oδ-(SO2)...Cδ+(CO) electronic interactions along with Hδ+(SO2Me).... Oδ-(CO), Hδ+(CH2)[POEt].... Oδ-(SO2Me), Hδ+(o-Ph).... Oδ-(CO) and Hδ+(o′-Ph).... Oδ-(PO) intramolecular hydrogen bonds. The almost constant negative carbonyl frequency shifts (Δν) for the title compounds 1-6 with respect to the parent acetophenones 7-14 corroborates the prevalence of the electronic interactions over the -Iσ inductive effect of the α-substituents for the title compounds and gives strong support for the existence of the crossed Oδ-(CO)...Sδ+(SO2Me) and Oδ-(SO2)...Cδ+(CO) (charge transfer and electrostatic); Oδ-(CO)...Pδ+(PO) and Oδ-[PO(OEt)]...Cδ+(CO), (electrostatic) interactions. © 2008 Elsevier B.V. All rights reserved.8921-3300304Distefano, G., Dal Colle, M., Bertolasi, V., Olivato, P.R., Bonfada, E., Mondino, M.G., (1991) J. Chem Soc., Perkin Trans., 2, p. 1195Olivato, P.R., Bonfada, E., Rittner, R., (1992) Magn. Reson. Chem., 30, p. 81Dal Colle, M., Bertolasi, V., de Palo, M., Distefano, G., Jones, D., Modelli, A., Olivato, P.R., (1995) J. Chem. Phys., 99, p. 15011Olivato, P.R., Guerrero, S.A., Rittner, R., (1997) Phosphorus Sulfur Silicon, 130, p. 155Olivato, P.R., Hui, M.LT., Rodrigues, A., Ruiz Filho, R., Rittner, R., Zukerman-Schpector, J., Distefano, G., Dal Colle, M., (2003) J. Mol. Struct., 645, p. 259Olivato, P.R., Reis, A.K.C.A., Ruiz Filho, R., Zukerman-Schpector, J., Rittner, R., (2004) J. Mol. Struct. (Theochem.), 677, p. 199Olivato, P.R., Ruiz Filho, R., Zuckerman-Schpector, J., Dal Colle, M., Distefano, G., (2001) J. Chem. Soc., Perkin Trans., 2, p. 97Jones, D., Dal Colle, M., Distefano, G., Ruiz Filho, R., Olivato, P.R., (2001) J. Organomet. Chem., 625, p. 121Olivato, P.R., Reis, A.K.C.A., Zukerman-Schpector, J., Tormena, C., Rittner, R., Domingues, N.L.C., Dal Colle, M., (2006) J. Mol. Struct., 798, p. 57Sega, E.M., Reis, A.K.C.A., Olivato, P.R., Rodrigues, A., Carvalho, J.E., Castilho, R.F., Rittner, R., Höehr, N.F., (2008) Clin. Chim. Acta, 389, p. 177Reis, A.K.C.A., Olivato, P.R., Rittner, R., (2005) Magn. Reson. Chem., 43, p. 85Galactic Industries Corporation, 1991-1998M.J. Frisch, G.W. Trucks, H.B. Schlegel, G.E. Scuseria, M.A. Robb, J.R. Cheeseman, V.G. Zakrzewski, J.A. Montgomery Jr., R.E. Stratmann, J.C. Burant, S. Dapprich, J.M. Millam, A.D. Daniels, K.N. Kudin, M.C. Strain, O. Farkas, J. Tomasi, V. Barone, M. Cossi, R. Cammi, B. Mennucci, C. Pomelli, C. Adamo, S. Clifford, J. Ochterski, G.A. Petersson, P.Y. Ayala, Q. Cui, K. Morokuma, D.K. Malick, A.D. Rabuck, K. Raghavachari, J.B. Foresman, J. Cioslowski, J.V. Ortiz, B.B. Stefanov, G. Liu, A. Liashenko, P. Piskorz, I. Komaromi, R. Gomperts, R.L. Martin, D.J. Fox, T. Keith, M.A. Al-Laham, C.Y. Peng, A. Nanayakkara, C. Gonzalez, M. Challacombe, P.M.W. Gill, B. Johnson, W. Chen, M.W. Wong, J.L. Andres, M. Head-Gordon, E.S. Repogle, J.A. Pople, Gaussian 98, Revision A.6, Gaussian, Pittsburg, PA, 1998Riddick, J.A., Bunger, W.B., (1970) Techniques of Organic Chemistry, vol. II: Organic Solvents. third ed., , Wiley, New YorkMarch, J., (1985) Advanced Organic Chemistry. third ed., , Wiley, New YorkHansh, C., Leo, A., Hoekman, D., (1995) Exploring QSAR Hydrophobic, Electronic and Steric Constants, , American Chemical Society, Washington, D
Nacerdes melanura
No full textNacerdes melanura (Linnaeus 1758) (Fig. 1) On the 31 th of May 2012 twelve specimens of Nacerdes melanura (Linnaeus, 1758) were collected from buildings in different streets in Nesher and brought to Tel-Aviv University by U. Shalom (Ministry of Environmental Protection). Mr. Shalom reported that N. melanura were infesting some houses in the area for the last 5 years or so. Adults were seen from May to July inside and around the buildings, mainly during the morning hours. Nesher is a small town on the northeastern slopes of the Carmel Ridge, close to Haifa and its harbor. Nacerdes melanura is also known by its common name "the Wharf borer". It is a well known wood boring species with a preference for wet and decaying wood (ISU Extension 2005). Larvae often inhabit wet timber along rivers and harbors and therefore it is considered a major pest in docks and stored wooden objects in warehouses (Unger et al. 2011). It is most probable that this species was introduced to Israel through the harbor of Haifa. On the 16 th of May 2013 the first author (OR) collected a single specimen in a plant nursery in Kefar 'Azar in the central coastal plain of Israel, 6 km East of Tel-Aviv. This is the first record from central Israel and an expansion of its distribution to other parts of the country. We now consider N. melanura as an established new invasive pest species in Israel. Examined material (Fig. 3): Carmel Ridge, Nesher, 31.v.2012, M. Krinsky (12 exx.); Central Coastal Plain, Kefar 'Azar, 15.v.2013, O. Rittner (1 ex.).Published as part of Rittner, Oz & Nir, Assaf, 2014, First records of Nacerdes melanura (Linnaeus 1758) and Xanthochroina auberti (Abeille de Perrin 1876) (Coleoptera: Oedemeridae) from Israel, pp. 397-400 in Zootaxa 3838 (3) on page 397, DOI: 10.11646/zootaxa.3838.3.10, http://zenodo.org/record/492740
The breakthrough potential of LA-ICP-MS for understanding the chemical stratigraphy in deep polar ice cores
No full textState-of-the-art ice core research calls for understanding the deepest and oldest ice sections at
unprecedented resolution, not least for retrieving a 1.5 million-year “Oldest Ice Core” record from Antarctica.
Mastering this frontier demands high-resolution analysis due to layer thinning and accounting for postdepositional
changes to the stratigraphy. Its micron-scale resolution and micro-destructiveness make laser
ablation inductively coupled plasma mass spectrometry (LA-ICP-MS) especially suited for the analysis of
chemical impurities in ice cores [1]. If employed for 2D imaging, LA-ICP-MS allows to map the spatial
impurity distribution in ice. This already shows great potential for assessing the interplay of impurities and
the ice matrix [2]. However, deep ice features ice crystals larger than a few cm and can alter the composition
of its impurities by chemical reactions. To succeed further, LA-ICP-MS ice core analysis needs to cover a
broad spectrum of elements while avoiding cutting ice cores into small-sized samples. Aiming to engage
with the broad laser ablation community we present our latest developments and some initial steps in
tackling this challenge. In a recently conducted pilot experiment we explored “time of flight” mass
spectrometry for a range of elements, including Antarctic ice with very low concentrations [3]. Multielemental
images at 20 microns resolution allow the geochemical characterization of impurities localized
at crystal boundaries as well as clustered dust particles. Aiming to increase physical image dimensions and
to avoid destructive sample preparation, we present first progress in developing a large cryocell housing up
to 55 cm long ice core rods. Here, the main challenge is to expand on pioneering solutions [4] by integrating
2D imaging capabilities. When combined with a modern high-repetition rate laser system, a large imagingcapable
cryocell would bring into reach the recording of centimeter or even decimeter-sized images along a
broad range of analytes – ultimately making LA-ICP-MS a true breakthrough technology for the “Oldest Ice”
quest
The first record of Polyphylla olivieri (Laporte de Castelanu, 1840) (Scarabaeidae: Melolonthinae) from Lebanon
No full textPolyphylla (Polyphylla) olivieri (Laporte de Castelanu, 1840) is a widely distributed June Beetle that occurs in Azerbaijan, Armenia, Georgia, Greece, Turkey, Iran, Syria and Israel (Bezdek 2006). Although it would be only logical to assume that the species is present also in Lebanon, it was never actually reported from there and so Lebanon remained a blank spot in its known range of distribution. During the examination of the Melolonthini beetles deposited in the National Collection of Insects, The Steinhardt Museum of Natural History, Israel National Research Center, Tel Aviv University, Tel Aviv, Israel (SMNHTAU), the author encountered two specimens accompanied with handwritten data labels that read ‘Syria Bokaah [or Bekaah, as ink is blurred]’. Bekaah is recently known as Beqaa [Becaa] Valley (in English), Wadi al-Biqaʻ (in Arabic) or el-Bohah (Lebanese dialect). It is a large valley situated east of Beirut in Lebanon between the Anti-Lebanon mountains to the east and Mount Lebanon to the west.
Cite as: Rittner, O. 2016. The first record of Polyphylla olivieri (Laporte de Castelanu, 1840) (Scarabaeidae: Melolonthinae) from Lebanon. Israel Journal of Entomology 46: 77–78.
DOI: 10.5281/zenodo.58066
urn:lsid:zoobank.org:pub:DE2F5067-F9C-4B9E-A3D-3CDAC462CFF
Intramolecular Interactions In α-mono-substituted Acetic Acids Through 13c Nmr Chemical Shifts And Theoretical Calculations
No full text13C NMR chemical shifts for some α-heterosubstituted acetic acids are reported. The α-methylene carbon presents high ICS ("Intramolecular Interaction Chemical Shifts") values, which are very similar to those of other series of carbonyl compounds. Neither the ICS or the SCS ("Substituent induced Chemical Shifts") correlate with the usual substituent electronic and/or steric parameters. Those experimental chemical shifts are very close to the ones obtained by theoretical calculations (MP2). The carbonyl carbon chemical shifts also deviate from the empirically calculated values, but are similar to the theoretically estimated shifts (DFT). These observations indicate that, while the theoretically calculated values match the experimental values, the same does not occur with the ones obtained by empirical methods, which can be valuable tools for checking the occurrence of significant intramolecular interactions between two substituents attached to the same methylene carbon atom.4505/06/15148153Grant, D.M., Paul, E.G., (1964) J. Am. Chem. Soc., 86, p. 2984Stothers, J.B., (1972) Carbon-13 NMR Spectroscopy, , Academic Press, New YorkMartin, G.J., Martin, M.L., Odiot, S., (1975) Org. Magn. Reson., 7, p. 2Rittner, R., (1985) Quim. Nova, 8, p. 170Breitmaier, E., Voelter, W., (1987) Carbon-13 NMR Spectroscopy, , 3rd ed., VCH, WeinheimDuddeck, H., (1986) Top. Stereochem., 16, p. 219Rittner, R., (1987) Recent Advances in Organic NMR Spectroscopy, , J. B. Lambert and R. Rittner (eds.), Norell Press, LandisvilleRittner, R., Vanin, J.A., Wladislaw, B., (1988) Magn. Reson. Chem., 26, p. 51Rittner, R., Martins, M.A.P., Clar, G., (1988) Magn. Reson. Chem., 26, p. 73Rittner, R., Silva, E.L., Canto, E.L., (1990) Spectrosc. Int. J., 8, p. 173Rittner, R., Canto, E.L., Grehs, J., (1991) Spectros Copy, 9, p. 31Rittner, R., Braibante, M.E.F., (1992) Magn. Reson. Chem., 30, p. 420Basso, E.A., Kaiser, C.R., Rittner, R., Lambert, J.B., (1994) Magn. Reson. Chem., 32, p. 205Eloranta, J., Hu, J., Suontamo, R., Kolehmainen, E., Knuutinen, J., (2000) Magn. Reson. Chem., 38, p. 205Foresman, J.B., Frish, A., (1996) Exploring Chemistry with Electronic Structure Methods, 2nd Ed., , Gaussian, Pittsburgh, PAFrisch, M.J., Trucks, C.W., Schlegel, H.B., Scuseria, G.E., Robb, M.A., Cheeseman, J.R., Zakrzewski, V.G., Pople, J.A., (1998), Gaussian Inc., Pittsburgh, PAInamoto, N., Masuda, S., (1982) Chem. Lett., p. 1007Hansch, C., Leo, A., Hoeckman, D., (1995) Exploring QSAR - Hydrophobic, Electronic, and Steric Constants, , A.C.S., Washington DCCharton, M., (1987) Prog. Phys. Org. Chem., 16, p. 287Charton, M., (1983) Top. Curr. Chem., 114, p. 57Spiesecke, H., Schneider, W.G., (1961) J.Chem.Phys., 35, p. 722Sofia, R.C.R., (1996), M.Sc. Thesis, Universidade Estadual de CampinasTanaka, S., Toda, S., Nagoya, C., Kanotha, K., Hashimoto, S., Musha, K., Yamaguchi, K., (1975) Bunseki Kagaku, 24, p. 553Stothers, J.B., Lauterbur, P.C., (1964) Can. J. Chem., 42, p. 1563Eisenstein, O., Ahn, N.T., Devaquet, J.A., Cantacuzène, J., Salem, L., (1974) Tetrahedron, 30, p. 1717Metzger, P., Casadevall, E., Casadevall, A., Pouet, M.J., (1980) Can. J. Chem., 58, p. 1503Olivato, P.R., Rittner, R., (1996) Rev. Heteroatom Chem., 15, p. 11
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