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291 research data, page 1 of 30

Constitution of Grignard Reagent RMgCl in Tetrahydrofuran

The constitution of Grignard reagent, RMgCl (R = Me, tBu, Ph or benzyl), was investigated in the solid state by means of X-ray crystallography and in THF by coldspray ionization mass spectrometry (CSI-MS). Three types of crystal structures, (a) [Mg2(μ-Cl3)(THF)6]+·[RMgCl2(THF)]-, (b) R2Mg4Cl6(THF)6, and (c) [2Mg2(μ-Cl3)(THF)6]+·[R4Mg2Cl2]2-, were identified, and MeMg2(μ-Cl3)(THF)4-6 were detected as major species of MeMgCl in solution.

Natality Detail File, 1987: [United States]

United States Department of Health and Human Services. National Center for Health Statistics (2001)
Publisher: ICPSR - Interuniversity Consortium for Political and Social Research
This collection provides information on live births in the United States during calendar year 1987. The natality data in this file are a component of the vital statistics collection effort maintained by the federal government. Geographic variables of residence for births include the state, county, city, population, division and state subcode, Standard Metropolitan Statistical Area (SMSA), and metropolitan/nonmetropolitan county. Other variables include the race and sex of the child, the age o...

Biogeochemical data from surface sediments in the Porcupine Abyssal Plain, supplement to: Danovaro, Roberto; Dell'Anno, Antonio; Fabiano, Mauro (2001): Bioavailability of organic matter in the sediments of the Porcupine Abyssal Plain, northeastern Atlantic. Marine Ecology Progress Series, 220, 25-32

Danovaro, Roberto; Dell'Anno, Antonio; Fabiano, Mauro (2001)
Publisher: PANGAEA - Data Publisher for Earth & Environmental Science
We investigated spatial and temporal changes in quantity, quality and bioavailability of organic matter in abyssal sediments of the northeastern Atlantic. Sediment samples were collected in the Porcupine Abyssal Plain (PAP, 4800 m depth) during 6 oceanographic cruises from September 1996 to October 1998 down to a depth of 15 cm. Sedimentary proteins, carbohydrates and lipids, and their enzymatically hydrolysable fractions showed significant temporal changes, but different biochemical classes ...

Patientensouveränität : der autonome Patient im Mittelpunkt

In Anbetracht des wachsenden finanziellen Drucks auf die sozialen Sicherungssysteme drängt sich immer stärker die Frage auf, ob sich in Zukunft die Errungenschaften der modernen Medizin im Rahmen einer allgemeinen Gesundheitsversorgung bei weitgehend stabilen Beitragssätzen zur gesetzlichen Krankenversicherung (GKV) überhaupt noch finanzieren lassen. Die in den inzwischen zahlreich vorliegenden Untersuchungen formulierten Vorschläge für Maßnahmen zur Weiterentwicklung des Gesundheitssystems z...

Synthesis and Structure of Yttrium and Lanthanide Bis(phosphinimino)methanides

Reaction of K{CH(PPh2NSiMe3)2} (1) with anhydrous yttrium or lanthanide trichlorides leads to [{CH(PPh2NSiMe3)2}LnCl2]2 (Ln = Y (2a), Sm (2b), Er (2c), Dy (2d), Yb (2e), Lu (2f)). The single-crystal X-ray structures of these complexes show that the methine carbon is bound to the lanthanide atom. This is supported by DFT calculations, which show a comparable interaction. Due to the similar ion radii of the lanthanides, the single-crystal X-ray structures of 2a−f are isostructura...

Cesium(I)-Mediated 3-D Superstructures by One-Pot Self-Organization of Hydrogen-Bonded Nickel Complexes

Cesium(I)-Mediated 3-D Superstructures by One-Pot Self-Organization of Hydrogen-Bonded Nickel Complexes

On the centipedes (Chilopoda) of the Republic of Macedonia

plazi (2001)
Publisher: Plazi.org taxonomic treatments database
This dataset contains the digitized treatments in Plazi based on the original journal article Pavel Stoev (2001): On the centipedes (Chilopoda) of the Republic of Macedonia. Historia naturalis bulgarica 13: 93-107, URL: http://un.availab.le

Structural Dynamics and Cation Interactions of DNA Quadruplex Molecules Containing Mixed Guanine/Cytosine Quartets Revealed by Large-Scale MD Simulations

Špačková, Nad'a; Berger, Imre; Šponer, Jiří (2001)
Publisher: Figshare
Large-scale molecular dynamics (MD) simulations have been utilized to study G-DNA quadruplex molecules containing mixed GCGC and all-guanine GGGG quartet layers. Incorporation of mixed GCGC quartets into G-DNA stems substantially enhances their sequence variability. The mixed quadruplexes form rigid assemblies that require integral monovalent cations for their stabilization. The interaction of cations with the all-guanine quartets is the leading contribution for the stability of t...