bluuebunny/crossref_metadata_2025_split huggingface dataset:
Team work at its best – TAPL and its two domains
Authors: Zollmann Tina , Bock Christoph , Graab Philipp , Abele Rupert 
Published: February 2015

AbstractThe transporter associated with antigen processing (TAPL, ABCB9) is a homodimeric ABC transporter, shuttling cytosolic polypeptides into the lumen of lysosomes energized by ATP hydrolysis. Here we give a short overview of the superfamily of ABC transporters and summarize the current state of knowledge on TAPL in detail. The architecture of TAPL and its substrate specificity are described and we discuss the function of an extra N-terminal transmembrane domain, called TMD0, in respect of subcellular targeting and interaction with proteins, contributing to long-term stability. As TAPL shows – besides a ubiquitous basal expression – an elevated expression in antigen presenting cells, we present models of TAPL function in adaptive immunity.
Crystal structure of (E)-3-(4-methoxyphenyl)-1-(thiophen-2-yl)-2- tosylprop-2-en-1-one, C21H18O4S2
Authors: Abdel-Aziz Hatem A. , Ghabbour Hazem A. , Fun Hoong-Kun 
Published: February 2015

Abstract C21H18O4S2, orthorhombic, Pbca (no. 61), a = 8.2038(3) Å, b = 19.8810(7) Å, c = 24.0661(8) Å, V = 3925.2 Å3, Z = 8, Rgt(F) = 0.0490, wRref(F2) = 0.1426, T = 293 K.
Numerical Solution of a Plane Jet Impingement on an Infinite Flat Surface
Authors: Arora S. , Irfan Nagma 
Published: February 2015

AbstractIn this paper numerical solution of the unsteady plane incompressible viscous jet impinging on to an infinite flat surface are presented for Re=450. In the present study, all calculations have been done by using Dufort Frankel scheme and over relaxation scheme. Result and graphs have been obtained by using MATLAB programming. The obtained results explain the flow of water after exhaling from nozzle and the streamlines and vorticity of flow ofwater after striking with flat infinite surface. The solutions obtained by proposed method indicate that this approach is easy to implement and computationally very attractive and the results of our investigation are in qualitative agreement with those available in the literature [1, 9]. This method is capable of greatly reducing the size of calculations while still maintaining high accuracy of the numerical solution.
Ab Initio-Rechnungen zum F2-Molekül/ Different ab-initio calculations for the ground-state and some excited states of the F2-molecule
Authors: Kasseckert E. 
Published: February 2015

For the ground-state and the lower lying excited states of the fluorine-molecule VB -CI calculations with Slater-type orbitals and SCF -CI calculations with contracted Gauß-Lobe functions have been carried out. The SCF -CI method yields a fairly good description of the ground-state. But it is rather difficult to decide whether the SCF -CI calculations of the excited states are accurate or not. The discussion of the potential-curves of some higher excited states leads to the conjecture that the experimentally observed orange band-systems may belong to two transitions

1Σg
-→ 1Πu and 1Σu
+ → 1Πg.
But this should be checked in further calculations which must include higher orbitals as basis functions.
Miscibility Gaps in Fused Salts
Authors: Margheritis Chiara , Flor Giorgio , Sinistri Cesare 
Published: February 2015

Twelve systems formed with lithium fluoride and alkali halides were studied in order to put into evidence possible demixing phenomena. Liquiddiquid equilibra were found in the seven mixtures containing KBr, KI, RbBr, Rbl, CsCl, CsBr, and Csl; however, the miscibility gaps could be fully detected only for LiF + CsCl, LiF + KBr and LiF + RbBr.
The tendency to demix in these systems, formed by typically ionic components, agrees with the reciprocal Coulomb effect rule.
On the basis of the solid liquid and liquiddiquid equilibria, the LiF excess potentials were evaluated and compared with those calculated according to current theories.
First Order Perturbation Theory in the Study of Molecular Vibrations: Isotopic Rules and Properties of the Different Approximations
Authors: Alix A. , Mohan N. , Midler A. , Rai S. N. 
Published: February 2015

The first order perturbation expressions for various molecular constants such as isotopic shifts (⊿λi, ⊿λi/λi), inverse isotopic shifts (⊿σi, ⊿σi/σi), Coriolis coupling constants (Δξij)and mean amplitudes of vibration (Δ∑ij) obtained using different equations and approximations are given in detail.
The mathematical and physical properties of the different approximations are discussed extensively. Incidentally some isotopic rules obtained using the first order perturbation theory are presented.
Strahlungslose Übertragung der Anregungsenergie in lumineszierenden Lösungen verschiedener Konzentrationsverhältnisse von Donor zu Akzeptor / Non-Radiative Excitation Energy Transfer in Luminescent Solutions at Different Ratios of Donor to Acceptor Concentration
Authors: Bojarski C. , Burak F. , Grabowska E. 
Published: February 2015

Photoluminescence (PL) quantum yields (η/η0) of Na-fluoresceine (donor) in dependence on phloxin (acceptor) concentration in glycerin-water solutions at ratios of donor to acceptor concentration CD/CA equal to 48.2, 14.5 and 2.4 have been measured.
Similar measurements have been made on acriflavine (donor) and rhodamine B (acceptor) in methanol for CD/CA = 10 and 0.4. In all systems investigated it was found that the PL-yield η/η0 of the donor at a fixed value of CA is the smaller the bigger is the value of CD/CA. The experimental results have been compared with a theory (Z. Naturforsch. 25 a, 1760 [1970], Acta Phys. Hung. 30, 145 [1971]) describing concentrational changes of the PL-quantum yield. Full agreement of theory with experiment is found and the possibility of multi-step non-radiative excitation energy transfer from donor to acceptor has been proved.
Bestimmung der Bildungsenthalpie von Nitroxychlorid (Chlornitrat, NO3Cl) als Beitrag zur Deutung der Kinetik des thermischen NO3Cl-Zerfalls in der Gasphase und in der Lösungsphase / Determination of the Enthalpy of Formation of nitroxy Chloride (Chlorine Nitrate, NO3Cl). A Contribution to the Interpretation of the Kinetics of the Thermal Decomposition of NO3Cl in the Gas Phase and in Solution
Authors: Knauth H.-D. , Martin H. , Stockmann W. 
Published: February 2015

The dissociation energy values ⊿H0298(ClO- NO2) = 25.87 kcal mol-1 and ⊿H0
0(ClO-NO2),0 = 24.8 kcal mol-1 were derived from the standard enthalpy of formation of nitroxy chloride (NO3CI) ⊿Hf0 = 6.28 kcalmol-1 which has been determined from the reaction enthalpy of the gas phase reaction NOCI + NO3CI = 2 NO2 + Cl2. With the help of these data it was possible to show that in the thermal decomposition of NO3Cl, for which the overall reaction is NO3Cl = NO2 +½O2 + ½Cl2. at temperatures around 100 °C the equilibrium NO3Cl ⇄ NO2 + OCl is established. At the beginning of the reaction, there exists such a high OCl concentration that the decomposition occurs practically exclusively by the reactions
OCl + OCl + M ⇄Cl2O2 + M,
Cl2O2 + M → Cl2 + O2+M
and
OCl + OCl → Cl + OOCl,
the last of which is followed by Cl-consuming reaction steps, e.g. CI + NO3CI → NO3 + Cl2, apparently initiating chain reactions. The reaction step NO2 + NO3Cl → NO3 + NO2Cl, postulated from an investigation of the kinetics in a nono-polar inert solvent, and its daughter reactions probably occur for the gas phase reaction as well.
Elektrische Leitfähigkeit und Strahlung eines Argonplasmas im Nachleuchten
Authors: Hugentobler Edwin , Schneider Helmut 
Published: February 2015

Abstract
The electrical conductivity of an argon plasma in the afterglow has been measured by means of radiowave-diagnostic. The radiation of some ArI and ArII lines as well as the electron density are determined as a function of time. The relative population of the Ar lines (Boltzmann plot) are in agreement with the temperature as taken from Spitzer’s formula using the measured conductivity within errors, except at the very early afterglow. The observed intensities of the Arl lines and the measured electron density indicate that LTE exists for the excited states. However, the groundstate appears to be strongly underpopulated.
Elektrische Leitfähigkeitsuntersuchungen an einem smektischen flüssigen Kristall mit mehreren Mesophasen
Authors: Heppke G. , Benavent W. E. Montserrat , Schneider F. 
Published: February 2015

Abstract
3- [N- (p-Ethoxybenzilidene) -amino] -6-n-butylpyridine (ÄBBP) exhibits one nematic and two smectic mesophases. The electric conductivity of ÄBBP is studied as a function of temperature and is found to be strongly anisotropic in the smectic phases. The value parallel to the smectic layers is up to ten times higher than in the perpendicular direction. The parallel and perpendicular conductivities give different energies of activation, which is discussed on the basis of the McMillan theory.
Untersuchungen zur Quantenkondensation
Authors: Lin P. L. 
Published: February 2015

Abstract
It has recently been proved that quantum condensation can possibly occur only when the thermodynamic limit is formed with respect to all three space dimensions. Following this idea, it is shown that a rotating system is practically one-dimensional and therefore does not permit quantum condensation. The same is true for a charged system in an external magnetic field. However, an exact proof is given only for a second order phase transition.
Angeregte Zustände des Fluormoleküls
Authors: Kasseckert E. , Wirsam B. 
Published: February 2015

Abstract
For the lower lying excited states of the fluorine molecule elaborated SCF-CI calculations have been carried out. The discussion of the potential curves of some higher excited stable states leads to the conclusion that the experimentally observed orange band-system may belong to two transitions 1Σg
+ - 1Πu and 1Σu
- - 1Πg .
Computersimulation des Durchgangs schneller schwerer Ionen durch einkristalline dünne Goldschichten
Authors: Schmidt H. , Ewald H. 
Published: February 2015

Abstract
A Computer program for following the trajectories of high energy ions in a fcc-lattice has been written to study the energy loss of 60 MeV 127I ions channeled between (100)- and (111)- planes of a Au-single crystal. The motion of the ions is treated classically. It is assumed that the ion has only one important interaction at a time as it moves through the lattice. The interaction potential used in the calculation is a screened Coulomb potential with a screening function derived from Thomas-Fermi-theory. The slowing down of the incident ions through inelastic encounters with the atoms of the medium is described by a stopping power function which increases exponentially with the distance from the midplane of the channel walls.
Non L.T.E. Populations and Related Quantities for H-H+-e Plasmas as a Function of the Cut-off Level
Authors: Cacciatore M. , Capitelli M. 
Published: February 2015

Abstract
The influence of the choice of the cut-off level n* of the evaluation of the coefficients of quasistationary plasmas has been studied. The numerical results show that the coefficient r1(i) which represents the contribution of the population density of the ith excited level by direct excitation from the ground level, is strongly affected by the choice of n*. A minor influence is observed 1) on the coefficient r0(i) which represents the contribution to the population density of the ith level from the continuum of free electrons 2) on the collisional-radiative recombination (α) and ionization (S) coefficients'.
Löschung der Perylen-Fluoreszenz durch Schweratom-induzierte intermolekulare Singlett Triplett-Energieübertragung
Authors: Zander M. , Dreeskamp H. , Koch E. 
Published: February 2015

Abstract
The fluorescence of perylene is quenched by bromonaphthalene but not by bromo-benzene. This is explained with the assumption of an intermolecular energy transfer from the fluorescing state S1 of perylene to the lowest triplet state T1 of the halogen-naphthalene.
Luminescence of Cr2+ Centres and Related Optical Interactions Involving Crystal Field Levels of Chromium Ions in Zinc Sulfide
Authors: Grebe G. , Schulz H.-J. 
Published: February 2015

In the i.r. emission of ZnS:Cr crystals, a zero-phonon doublet at 5211 and 5216 cm-1 and a number of vibronie bands are resolved at T ≈ 4 K. The Td symmetry of the crystal field at the Cr2+ ion on a Zn lattice site is reduced to D2d by a static Jahn-Teller effect. Differences in the vibronie structures of absorption and emission indicate prevalence of quasi-local vibrations in the spectra. An exponential decay of the i.r. luminescence in the μs range yields an oscillator strength f = 6×10-4 (T = 4K) in accordance with selection rule reasoning for the radiative transition 5A1(5E)→5B2(5T2).
By interrelating a fit of transmission spectra with excitation spectra of luminescence and photoconduction, the distance of the Cr2+ centres from the conduction band edge is evaluated at 20700 cm-1 (T = 300 K). An irradiation of the crystals with photons of energies above this optical ionization threshold causes a sensitization for the Cr2+ i.r. luminescence. Thus, apart from effects related to traps, a novel excitation band at 10500 cm-1 arises which is interpreted by the 6A1(6S)→4T1(4G) transition of Cr+ centres. This transition terminates in a level degenerate with conduction band states so that free carriers will be released which, in turn, induce the Cr2+ emission.
Furthermore, at some of the crystals, the i.r. emission between 2500 and 3000 cm-1 of Fe2+ centres is recorded with the best resolution obtained so far.
Monte Carlo Computations on Molten Caesium Bromide
Authors: Margheritis Chiara , Sinistri Cesare 
Published: February 2015

Abstract
Molten CsBr was computer simulated tat 1 atm and four different temperatures using the Monte Carlo method. Structural and thermodynamic properties of the melt were obtained on the basis of pair potentials. In particular, radial distribution functions, volume, and energy with its coulomb, dipole-dipole, and repulsive components were determined. Separately, the polarization energy was also evaluated: this quantity increases with increasing temperature and ranges between 2 and 4% of the total energy.
Scheinbare Reflexion schneller Elektronen bei streifendem Einfall / Apparent reflection of fast electrons for glancing incidence
Authors: Mandour M. Abou , Harder D. 
Published: February 2015

Abstract
Backscattering of 20 MeV electrons from lead is simulated by a Monte Carlo code for varied angles of incidence. For glancing incidence, the most probable exit angle approaches the reflection angle, and the most probable energy approaches the initial energy. The underlying mechanism is derived from the calculations. Beam collimators for electron therapy may be improved by consideration of this effect.
Comparison of Faddeev Method and Resonating Group Method above Breakup Threshold
Authors: Söhre F. , Schmid E. W. 
Published: February 2015

Abstract
The reliability of the resonating group method is studied above the three-body breakup threshold. In particular, the real part of the elastic n-d phase shift is calculated in a model of three spinless bosons interacting by a separable Yamaguchi potential for which exact Faddeev results are available. Spurious singularities which are caused by the distortion part of the resonating group ansatz are eliminated by a least squares method.
Optically Detected Spin Locking of Zero Field Electronic Triplet States and Cross Relaxation in the Rotating Frame
Authors: Schuch H. , Harris C. B. 
Published: February 2015

The spin locking method known from NMR is shown to be useful also in ESR for investigating spin lattice relaxation problems and “slow” motions, e. g. questions of energy transfer by triplet states in organic molecular crystals, and probing of nuclear quadrupolar splittings even smaller than the ESR line width at zero magnetic field.
Optically detected ESR spin locking experiments for isolated triplet states in zero field are demonstrated. It is shown how the complication of incoming and decaying triplet states and relaxation between all three triplet sublevels has to be handled during spin locking. An application, the study of the cross-relaxation between electronic triplet spin states and deuteron or proton spins is presented. These experiments are possible in spite of the first order quenching of the hyperfine coupling in zero magnetic field. Another application is briefly mentioned, in which the adiabatically demagnetized state in the rotating frame is used to probe the electronic triplet state transfer and nuclear spin lattice relaxation.
Quantitative Investigation of the Radiation of the Negative Iodine Ion
Authors: Neiger Manfred 
Published: February 2015

Abstract
A pure iodine plasma is generated by a cylindric arc at 1 atm and 6 to 30 amps within a quartz tube of 8 mm diameter. The radiation emitted along the arc axis was measured absolutely in the wavelength range from 0.2 -1.9 μ. In the uv-region it consists mainly of the affinity continuum due to transitions of free electrons to the ground level of the negative iodine ions. The first threshold of this continuum at 4048 Å yields an electron affinity of the iodine atom of 3.062 eV. The resulting photodetachment cross-section of the I--ion exhibits a broad peak at 2400 Å, which can be attributed to a I--compound-state. The continuous background radiation in the visible and infrared regions shows, after subtraction of the electron-ion continuum, two long-wavelength thresholds near 1.25 μ and 0.64 μ. The absolute intensity of this radiation, its wavelength and temperature dependence and its threshold energy and threshold structure suggest the contribution of two dominant radiation processes: a second affinity continuum due to an excited state of the I--ion about 2 eV above the ground level and an association continuum of I2
+-molecules. Towards longer wavelengths λ>1.5 μ electron-atom Bremsstrahlung becomes more important.
Effective Interionic Potentials and Properties of Molten Noble and Transition Metals
Authors: Waseda Y. , Ohtani M. 
Published: February 2015

Abstract
Recent X-ray diffraction data on molten noble and transition metals have been used to calculate effective interionic potentials by means of the Born-Green equation. The results on the noble metals are compared with the generalized pseudopotential calculations of Moriarty. In all cases the potentions were found to be insensitive to temperature and to have long-range oscillations. The results suggest that the effective valence number is close to unity in these molten metals, this giving reasonable values of the electrical resistivity when calculated in the framework of the usual Ziman theory.
The self-diffusion coefficients, viscosities and surface tensions were calculated from the poten-tials and radial distribution functions using the kinetic theory of fluids. Adequate agreement with experimental data was obtained.
Strukturbestimmung von Chlorfluorthiocarbonyl durch Elektronenbeugung / The Structure of Thiocarbonyl-chloro-fluoride as determined by Gas-Electron-Diffraction
Authors: Gleisberg F. , Haberl A. , Zeil W. 
Published: February 2015

Abstract
Gas electron diffraction (GED) intensities of CSFCl were measured and resulted in an ra- structure of this molecule. An rav-structure was obtained by combining our GED-data and the rotational constants reported by Kohrmann and Zeil. Both structures were found to be consistent within their uncertainties. The planar structure of CSFCl has been confirmed. A least squares analysis resulted in the following rg-distances and bond angles: r(C-Cl) =1.7178±0.0009 Å, r(C=S) =1.5931 ±0.0008 Å, r(C-F) =1.3387±0.0014 Å, ∢ S = (C-Cl)=127.28 ± 0.09°, ∢(S=C-F)= 123.58 ±0.12°.
Inclusion of rotational constants into the GED-analysis allowed an experimental determination of all mean square amplitudes (MSA). We have used the valence force constants obtained by Kohrmann to evaluate the MSA theoretically. Qualitative agreement was found between the theoretical and experimental values of the MSA.
Fourier-Kernresonanzuntersuchungen an 10 B und 11 B in wäßriger Lösung / Fourier Transform NMR Studies of 10 B and 11 B in Aqueous Solutions
Authors: Epperlein B. W. , Lutz  , Schwenk A. 
Published: February 2015

Abstract
The ratios of the Larmor frequencies of 10 B and 2 H and of 11 B and 10 B have been measured with the NMR method and a magnetic moment has been calculated for 10 B in the B (OH)4
- -ion. For this, an investigation of the dependence of the NMR signals of 10 B and 2 H on the concentration of some boron salts in solutions of H2O and D2O was necessary. Using hyperfine interaction constants from literature, the hyperfine structure anomaly 10 ∆ 11 of boron in the 2 P1/2 atomic ground state has been calculated. A difference in the magnetic shielding between the isotopes 10 B and 11 B in different compounds could not be detected.
Form Factors for Rotational Levels in 12C, 16O, 28Si and 40 Ca
Authors: Lezuo K. J. 
Published: February 2015

Abstract
We support the proposed ground state rotational bands in 12 C, 16 O, 28 Si and 40 Ca by calculating the form factors for the electro-excitation within a simple model. The model introduces two parameters for the size and the surface thickness of these nuclei and allows for the prediction of the transition probabilities and form factors within the rotator model. The model unambiguously predicts the sequence of rotational levels 0+, 3+ , 4+ ... for 16 O and 40 Ca, and 0 + , 2 + , 4 + ... for 12 C and 28 Si in agreement with the experiment. The comparison of the calculated form factors with the experimental data shows excellent agreement in the cases 28 Si and 40 Ca and is less satisfactory in the cases 12 C and 16 O.
Notizen: E-Typ-verzögerte Fluoreszenz von 1,1′-Dicoronyl in einer Kunststoffmatrix / E-type Delayed Fluorescence of 1,1′-dycoronyl in a Plastic Matrix
Authors: Zander M. 
Published: February 2015

Abstract
E-type delayed fluorescence of 1,1′-dicoronyl (III) has been established by measurement of luminescence lifetimes and activation energy.
Observation of Turbulent Waves in a Helium Plasma by Optical Spectroscopy
Authors: Rutgers W. R. 
Published: February 2015

Abstract
From the combined Stark-Zeeman pattern of helium allowed and forbidden optical lines the frequency spectrum, the field strength and the dominant polarization of microfields were determined in a turbulent plasma. Two frequency domains of oscillations were found in a turbulent heating experiment: low-frequency oscillations with dominant polarization perpendicular to the current direction and high-frequency oscillations (f~fpe) with random polarization. The r.m.s. field strength of the oscillations is between 2 kV/cm and 10 kV/cm. The energy density of turbulent microfields amounts to 1‰ of the thermal energy density.