GLORIA — GEOMAR Library Ocean Research Information Access

1

Digitale Medien

Lattice site location studies of ion implanted 8Li in GaN (1998)

Dalmer, M. ; Restle, M. ; Sebastian, M. ; [weitere]

[S.l.] : American Institute of Physics (AIP)

Journal of Applied Physics 84 (1998), S. 3085-3089

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ISSN: 1089-7550

Quelle: AIP Digital Archive

Thema: Physik

Notizen: The lattice sites of ion implanted Li atoms in GaN were studied as a function of implantation temperature between room temperature and 770 K. We measured the channeling and blocking patterns of α-particles emitted in the radioactive decay of implanted 8Li ions to determine the Li lattice sites. Below 700 K Li atoms occupy mainly interstitial sites in the center of the c-axis hexagons at positions c/4 and 3c/4, where c is the lattice constant in c-axis direction. Around 700 K Li starts to diffuse and presumably interacts with vacancies created in the implantation process. This leads to the formation of substitutional Li above 700 K. An activation energy of about 1.7 eV for interstitial Li diffusion was determined. © 1998 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.368463

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2

Digitale Medien

Photodissociation of NH2: Two-dimensional potential energy surfaces for the dissociation into NH and H (1996)

Vetter, R. ; Zülicke, L. ; Koch, A. ; [weitere]

College Park, Md. : American Institute of Physics (AIP)

The Journal of Chemical Physics 104 (1996), S. 5558-5571

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ISSN: 1089-7690

Quelle: AIP Digital Archive

Thema: Physik , Chemie und Pharmazie

Notizen: Extensive multireference configuration interaction calculations were carried out in order to obtain complete two-dimensional (2D) potential energy surfaces for the amidogen (NH2) radical as functions of both N–H bond lengths keeping the bond angle fixed at its experimental ground state equilibrium value. The eight lowest-lying states (four of each symmetry, A′ and A″) were treated mainly for the purpose of using these surfaces in subsequent studies of the photodissociation dynamics. In analogy with the neighboring dihydrides CH2 and H2O the photodissociation of NH2 into NH+H (hydrogen abstraction) takes place preferentially after excitation of the first two Rydberg s states (3 2A′/2 2A1 and 2 2A″/2 2B1) found closely together at about 7.6 eV. The transition dipole moments connecting the ground state with these two states are large (0.44 a.u. and 0.66 a.u.) in the Franck–Condon region, but the behavior of the potentials in the dissociation channel is quite different. The 3 2A′/2 2A1 state is weakly repulsive whereas the 2 2A″/2 2B1 state is strongly repulsive. This will result in differences in the dissociation dynamics for the two states.The next higher state which should play a role in the NH2 photodissociation is the 4 2A″/3 2B1 Rydberg s state at 9.4 eV, because of its large transition dipole moment with the ground state (0.36 a.u.). Close to this state, many Rydberg p states were found. Due to the high density of states in the region above 9.0 eV, interactions of these states are expected and should lead to complicated dissociation dynamics. Contrary to CH2, the two low-lying valence states for NH2 are found at lower energies [2.2 eV (1 2A1) and 6.5 eV (1 2B2)], well separated from the first members of the Rydberg series. These states are less important for the photodissociation of NH2, compared with CH2, because the first state is bound and the transition to the other is dipole-forbidden in C2v symmetry. For H2O, the valence states are missing. © 1996 American Institute of Physics.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1063/1.471796

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3

Digitale Medien

The 1.7 Å crystal structure of the regulator of chromosome condensation (RCC1) reveals a seven-bladed propeller (1998)

Renault, Louis ; Nassar, Nicolas ; Vetter, Ingrid ; [weitere]

[s.l.] : Macmillan Magazines Ltd.

Nature 392 (1998), S. 97-101

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ISSN: 1476-4687

Quelle: Nature Archives 1869 - 2009

Thema: Biologie , Chemie und Pharmazie , Medizin , Allgemeine Naturwissenschaft , Physik

Notizen: [Auszug] The gene encoding the regulator of chromosome condensation (RCC1) was cloned by virtue of its ability to complement the temperature-sensitive phenotype of the hamster cell line tsBN2, which undergoes premature chromosome condensation or arrest in the G1 phase of the cell cycle at non-permissive ...

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1038/32204

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4

Digitale Medien

Buchbesprechungen (1996)

Greve, W. ; Westernhagen, H. ; Sperling, K. -R. ; [weitere]

Springer

Helgoland marine research 50 (1996), S. 539-549

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ISSN: 1438-3888

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF02367166

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5

Digitale Medien

Ueber die acute Phosphorvergiftung und deren Behandlung (1871)

Vetter, A.

Springer

Virchows Archiv 53 (1871), S. 168-209

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ISSN: 1432-2307

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01957189

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6

Digitale Medien

Transport of small organic cations in the rat liver (1996)

Martel, F. ; Vetter, T. ; Russ, H. ; [weitere]

Springer

Naunyn-Schmiedeberg's archives of pharmacology 354 (1996), S. 320-326

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ISSN: 1432-1912

Schlagwort(e): Rat liver ; Transport of organic cations ; OCT1 ; Type I hepatic transport of cationic drugs ; 1-Methyl-4-phenylpyridinium

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Notizen: Abstract The kidneys and the liver are the principal organs for the inactivation of circulating organic cations. Recently, an organic cation transporter (OCT1) has been cloned from rat kidney. In order to answer the question whether OCT1 is involved also in hepatic uptake of organic cations, the pharmacological characteristics of organic cation transport in hepatocytes were compared to the characteristics of transiently expressed OCT1. Primary cultures of rat hepatocytes avidly accumulated the small organic cation 3H-1-methyl-4-phenylpyridinium (3H-MPP+). At equilibrium, the hepatocytes accumulated 3H-MPP+ 56-fold. Initial rates of specific 3H-MPP+ transport in hepatocytes were saturable. The half-saturating concentration was 13 μmol/l. 3H-MPP+ transport was sensitive to quinine (Ki = 0.79 μmol/l) and cyanine863 (Ki = 0.097 µmol/l). Quinine and cyanine863 are known inhibitors of type I hepatic transport of cationic drugs and of renal excretion of organic cations, respectively. To compare the functional characteristics of 3H-MPP+ transport in hepatocytes with those of OCT1, OCT1 has been heterologously expressed and characterized in a mammalian cell line (293 cells). Initial rates of 3H-MPP+ transport were saturable, the Km being 13 μmol/l. The rank order of inhibitory potencies of various inhibitors was almost identical in hepatocytes and 293 cells transiently transfected with OCT1. There was a positive correlation between the Ki's for the inhibition of 3H-MPP+ transport in isolated hepatocytes and transfected 293 cells (r = 0.85; P〈0.01; n = 8). The results indicate that OCT1 is functionally expressed not only in the kidney but also in hepatocytes where it is responsible for the transport of small organic cations which, in the past, have been classified as type I substrates.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF00171063

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7

Digitale Medien

Die Therapie mit kolloidalem Ferrisaccharat (1956)

Gisinger, E. ; Vetter, H.

Springer

Annals of hematology 2 (1956), S. 320-326

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ISSN: 1432-0584

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01630267

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8

Digitale Medien

A polygynous nest ofVespula pensylvanica from California with a discussion of possible factors influencing the evolution of polygyny inVespula (1996)

Ratnieks, F. L. W. ; Vetter, R. S. ; Visscher, P. K.

Springer

Insectes sociaux 43 (1996), S. 401-410

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ISSN: 1420-9098

Schlagwort(e): Vespula pensylvanica ; polygyny ; Vespidae

Quelle: Springer Online Journal Archives 1860-2000

Thema: Biologie

Notizen: Summary A thriving, polygynous, and probably overwintered colony of the western yellowjacket,Vespula pensylvanica, was collected on 2 November 1994 in Riverside, southern California, and examined in detail. The colony had 14 combs, of combined area 1.30 m2 containing 55,704 small and 10,266 large cells. There were 17 functional, physogastric queens, 70 newly emerged non-reproductive queens, 7300 adult workers, 685 adult males, and c. 17,600 capped cells containing pupae or fully-fed larvae. Dissections of 200 workers showed that none had well-developed ovaries. Hypotheses for the rarity of polygyny inVespula are put forward and evaluated.

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01258412

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9

Digitale Medien

Cardiac function index, intrathoracic blood volumes, lung water and liver function—New parameters for earlier diagnosis of organ dysfunktion? (1996)

Gödje, O. ; Fischlein, T. ; Mair, H. ; [weitere]

Springer

Intensive care medicine 22 (1996), S. S56

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ISSN: 1432-1238

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01921230

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10

Digitale Medien

Less invasive, continuous cardiac-output measurement through pulse contour analysis versus conventional thermal dilution (1996)

Gödje, O. ; Höke, K. ; Fischlein, T. ; [weitere]

Springer

Intensive care medicine 22 (1996), S. S58

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ISSN: 1432-1238

Quelle: Springer Online Journal Archives 1860-2000

Thema: Medizin

Materialart: Digitale Medien

URL: http://dx.doi.org/10.1007/BF01921232

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