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Showing 1 to 12 of 313 entries
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Coherence in nonradiative transitions: internal conversion in Rydberg-excited N-methyl and N-ethyl morpholine.

Physical chemistry chemical physics : PCCP

Zhang Y, Jónsson H, Weber PM.
PMID: 28944391
Phys Chem Chem Phys. 2017 Oct 04;19(38):26403-26411. doi: 10.1039/c7cp05244h.

The survival of coherent wavepacket motion during internal conversions is observed in relatively large molecules, N-methyl morpholine and N-ethyl morpholine, where standard models imply fast decoherence in a statistical limit. Optical excitation in the region of 194 to 230...

Magnetic exchange force microscopy: theoretical analysis of induced magnetization reversals.

Nanoscale

Ivanov A, Bessarab PF, Uzdin VM, Jónsson H.
PMID: 28858357
Nanoscale. 2017 Sep 14;9(35):13320-13325. doi: 10.1039/c7nr04036a.

In magnetic exchange force microscopy a magnetic tip is scanned over the surface of a solid and an image representing the exchange interaction recorded. Sudden changes in the image corresponding to magnetization switching can be monitored as a function...

Complex Orbitals, Multiple Local Minima, and Symmetry Breaking in Perdew-Zunger Self-Interaction Corrected Density Functional Theory Calculations.

Journal of chemical theory and computation

Lehtola S, Head-Gordon M, Jónsson H.
PMID: 27232582
J Chem Theory Comput. 2016 Jul 12;12(7):3195-207. doi: 10.1021/acs.jctc.6b00347. Epub 2016 Jun 14.

Implentation of seminumerical stability analysis for calculations using the Perdew-Zunger self-interaction correction is described. It is shown that real-valued solutions of the Perdew-Zunger equations for gas phase atoms are unstable with respect to imaginary orbital rotations, confirming that a...

Birth of two volcanic islands in the southern Red Sea.

Nature communications

Xu W, Ruch J, Jónsson S.
PMID: 26010945
Nat Commun. 2015 May 26;6:7104. doi: 10.1038/ncomms8104.

Submarine eruptions that lead to the formation of new volcanic islands are rare and far from being fully understood; only a few such eruptions have been witnessed since Surtsey Island emerged to the south of Iceland in the 1960s....

Synthesis and characterization of a family of POCOP pincer complexes with nickel: reactivity towards CO2 and phenylacetylene.

Chemistry (Weinheim an der Bergstrasse, Germany)

Jonasson KJ, Wendt OF.
PMID: 25080339
Chemistry. 2014 Sep 08;20(37):11894-902. doi: 10.1002/chem.201403246. Epub 2014 Jul 30.

A cyclohexyl-based POC sp 3OP pincer ligand (POC sp 3OP=cis-1,3-bis(di-tert-butylphosphinito)cyclohexyl) cyclometalates with nickel to generate a series of new POC sp 3OP-supported Ni(II) complexes, including the halide, hydride, methyl, and phenyl species. trans-[NiCl{cis-1,3-bis(di-tert-butylphosphinito)cyclohexane}], [(POC sp 3OP)NiCl] (1 a) and...

Effects on plant production after addition of labile carbon to arctic/alpine soils.

Oecologia

Schmidt IK, Michelsen A, Jonasson S.
PMID: 28307477
Oecologia. 1997 Oct;112(3):305-313. doi: 10.1007/s004420050313.

Biomass production was analysed in Festuca vivipara, grown for 3 months in pots with non-sterilized or sterilized soil after factorial addition of three levels of labile carbon combined with high and low levels of N and P. The soil...

Effects of labile soil carbon on nutrient partitioning between an arctic graminoid and microbes.

Oecologia

Schmidt IK, Michelsen A, Jonasson S.
PMID: 28307634
Oecologia. 1997 Nov;112(4):557-565. doi: 10.1007/s004420050345.

We measured partitioning of N and P uptake between soil microorganisms and potted Festuca vivipara in soil from a subarctic heath in response to factorial addition of three levels of labile carbon (glucose) combined with two levels of inorganic...

Gradual caldera collapse at Bárdarbunga volcano, Iceland, regulated by lateral magma outflow.

Science (New York, N.Y.)

Gudmundsson MT, Jónsdóttir K, Hooper A, Holohan EP, Halldórsson SA, Ófeigsson BG, Cesca S, Vogfjörd KS, Sigmundsson F, Högnadóttir T, Einarsson P, Sigmarsson O, Jarosch AH, Jónasson K, Magnússon E, Hreinsdóttir S, Bagnardi M, Parks MM, Hjörleifsdóttir V, Pálsson F, Walter TR, Schöpfer MP, Heimann S, Reynolds HI, Dumont S, Bali E, Gudfinnsson GH, Dahm T, Roberts MJ, Hensch M, Belart JM, Spaans K, Jakobsson S, Gudmundsson GB, Fridriksdóttir HM, Drouin V, Dürig T, Aðalgeirsdóttir G, Riishuus MS, Pedersen GB, van Boeckel T, Oddsson B, Pfeffer MA, Barsotti S, Bergsson B, Donovan A, Burton MR, Aiuppa A.
PMID: 27418515
Science. 2016 Jul 15;353(6296):aaf8988. doi: 10.1126/science.aaf8988.

Large volcanic eruptions on Earth commonly occur with a collapse of the roof of a crustal magma reservoir, forming a caldera. Only a few such collapses occur per century, and the lack of detailed observations has obscured insight into...

Feasibility Study of a Novel Electrode Concept for a Neuroprosthesis for Augmentation of Impaired Finger Functions.

European journal of translational myology

Hugosdóttir R, Jónasson SÞ, Sigþórsson H, Helgason Þ.
PMID: 26913139
Eur J Transl Myol. 2014 Sep 15;24(3):4671. doi: 10.4081/ejtm.2014.4671. eCollection 2014 Sep 23.

The project "Finger Rehabilitation" aims to design a neuroprosthesis with integrated electronics. The neuroprosthesis should enable spinal cord injured people, with injury at cervical vertebrae level, to increase finger mobility and activity with the use of functional electrical stimulation....

Infectious Process Complicating Renal Transplantation.

Postgraduate medicine

Sparagana M, Rubnitz ME, Jonasson O, Vana M.
PMID: 27409394
Postgrad Med. 1974 Dec;56(7):109-115. doi: 10.1080/00325481.1974.11713931.

No abstract available.

Retention of conservative and sorptive solutes in streams--simultaneous tracer experiments.

The Science of the total environment

Johansson H, Jonsson K, Forsman KJ, Wörman A.
PMID: 11258821
Sci Total Environ. 2001 Feb 05;266(1):229-38. doi: 10.1016/s0048-9697(00)00758-0.

The effective transport velocity of solutes in rivers and streams is governed by transient storage in hyporheic zones in which the longitudinal advection velocity is small relative to the main stream flow velocity. Results from a simultaneous tracer experiment...

Theoretical calculations of dissociative adsorption of CH4 on an Ir(111) surface.

Physical review letters

Henkelman G, Jónsson H.
PMID: 11177907
Phys Rev Lett. 2001 Jan 22;86(4):664-7. doi: 10.1103/PhysRevLett.86.664.

The activation energy for chemisorption of CH(4) at an Ir(111) surface is determined using density functional theory combined with an estimate of the long range dispersion interaction. The results are found to be in good agreement with published results...

Showing 1 to 12 of 313 entries