Laszlo Marosi - Academia.edu (original) (raw)

Papers by Laszlo Marosi

The influence of the soup-bubble structure on the stability of a static, flat Universe consisting... more The influence of the soup-bubble structure on the stability of a static, flat Universe consisting of matter and a repulsive with 1/RU (RU = radius of the Universe) decaying scalar field Ψ has been studied. It is shown that due to the locally heterogeneous mass distribution the bubbles are subject to an instability driven by the repulsive force of Ψ. The excess of repulsive forces inside the voids causes a true instability which can drive the cosmic expansion up to radii comparable in scale to the voids in the large scale galaxy distribution. The tentative conclusion is discussed if the background radiation possibly could exert properties similar to those of a repulsive scalar field.

The influence of the soup-bubble structure on the stability of a static, flat universe consisting... more The influence of the soup-bubble structure on the stability of a static, flat universe consisting of baryonic matter and a repulsive with 1/RU (RU = radius of the universe) decaying scalar field Ψ has been studied. It is shown that due to the locally heterogeneous mass distribution the bubbles are subject to expansion driven by the repulsive force of Ψ. The tentative conclusion is discussed if the background radiation possibly could exert properties similar to those of a repulsive scalar field.

Surface Science Spectra, 1993

It is known from crystallographic investigations that there are two distinct Pt–S modifications, ... more It is known from crystallographic investigations that there are two distinct Pt–S modifications, PtS and PtS2 [see R. Collins, R. Kaner, P. Russo, A. Wold, and D. Avignant, Inorg. Chem. 18, 727 (1979); A. Finley, D. Schleich, J. Ackerman, S. Soled, and A. Wold, Mater. Res. Bull. 9, 1655 (1974); S. Soled, A. Wold, and O. Gorochov, ibid. 11, 927 (1976); L. Thomasson, Z. Phys. Chem. Bd. 2, 349; and L. Thomasson, ibid. 4, 277]. They are not commercially available in high grade purity. In the present study the production of pure PtS reference materials and its characterization by x‐ray photoelectron spectroscopy is presented. The PtS2 investigation is shown in a second submission. The PtS samples were produced by annealing stoichiometric mixtures of elemental platinum (DEGUSSA, grade 99.9%) and sulfur (Riedle de Haen, grade 99.5%). Both powders were blended homogeneously and pressed into pellets. The pellets were annealed for 3 weeks in an evacuated quartz tube (800 °C, 10‐4 Pa) and cooled in defined steps to ...

Journal of Materials Research, 1997

The synthesis and characterization of mesostructured zirconia and titanium oxides are presented. ... more The synthesis and characterization of mesostructured zirconia and titanium oxides are presented. The samples were investigated by x-ray powder diffraction (XRD), transmission electron microscopy (TEM), and atomic force microscopy (AFM). XRD and TEM revealed only lamellar structures for both materials, whereas AFM could detect locally restricted initial stages of cubic or hexagonal phases in a globally lamellar Ti oxide.

Journal of Catalysis, 2000

Justus Liebigs Annalen der Chemie, 1973

Die von Aleby und Mitarbeitern gefundene Regel fur das Auftreten des vertikalen Typs der Gitterst... more Die von Aleby und Mitarbeitern gefundene Regel fur das Auftreten des vertikalen Typs der Gitterstruktur bei Estern geradzahliger Fettsauren wurde bestatigt. – Ester ungeradzahliger Fettsauren kristallisieren dann nach diesem Typ, wenn der Alkylrest 1, 2 oder 3 Kohlenstoffatome mehr, oder 4 oder 5 Kohlenstoffatome weniger enthalt als der Acylrest. — In den untersuchten Schmelzpunktkurven der Ester von 9 geradzahligen und 7 ungeradzahligen Fettsauren kommt die Ahnlichkeit dieser Kurven zum Ausdruck, wenn als Abszisse die Differenz der Zahl der Kohlenstoffatome im Alkyl- und Acylrest gewahlt wird. Bei homologen Dialkylestern von ω,ω′-Dicarbonsauren und homologen Difettsaureestern von ω,ω′-Diolen liegen die Scharen der Schmelzpunktkurven konform ubereinander, wenn als Abszisse die volle Zahl der Kohlenstoffatome im Alkyl- oder Acylrest eingesetzt wird. – Der grose Netzebenenabstand in Fettsaureestern, Dicarbonsaureestern und Diolestern mit vertikalem Strukturtyp erwies sich als exakt lineare Funktion der Zahl der Kohlenstoffatome im Ester. Er wurde aufgegliedert in die Inkremente der C,C-Bindung (1.265 A), das Inkrement der COC-Bindung (2.59 A) und den auf die lange Achse des Kristalls projizierten zwischenmolekularen Abstand (2.67 A). Long-Chain Carboxylic Esters: Melting Points, Rules for Occurrence of Vertical Type Crystals, and Atomic Distances in Long Spacings Melting points and crystal structures of straight-chain esters of monocarboxylic acids with mono-alcohols, monocarboxylic acids with di-alcohols, and dicarboxylic acids with monoalcohols were determined. From more than 700 even and odd membered chain compounds the following principles became apparent. – Homologous series of even numbered carboxylic acids with even and odd numbered alcohols give irregular but similar melting point curves (Fig. 1). Most of these compounds crystallize in tilted type structures but esters of the general formula acyl-Cn + alkyl-Cn+2 and acyl-Cn + alkyl-Cn–4 have vertical type structures. The melting points of the latter do not give an indication of deviation from the tilted type. The data confirm and supplement earlier findings reported by Aleby et al. – Monoesters of odd carboxylic acids with odd and even alcohols have vertical crystal structures for compounds acyl-Cn + alkyl-Cn+1, n+2, n+3 and acyl-Cn + alkyl-Cn–4, n–5. The other esters show tilted structures. Again, the melting point curves are similar (Fig. 2) but the alternating pattern for odd and even alcohols is much less pronounced than in the case of esters of even carboxylic acids. — The melting point curves of these di-esters are similar within each group of compounds. Vertical structures occur according to principles based on absolute chain length rather than on relative chain lengths of moieties. – Large spacings of vertical type monoesters and di-esters were determined. The increment for CC is 1.265 A, and for COC it is 2.59 A; the end to end intermolecular distance, projected on the long axis, is 2.67 A.

Angewandte Chemie, 1964

geschlossener Anordnung enthielten. An Komponenten (2) mit mehreren Reaktionszentren finden Mehrf... more geschlossener Anordnung enthielten. An Komponenten (2) mit mehreren Reaktionszentren finden Mehrfachubertragungen statt. Folgende Diazo-Verbindungen und Chinon-diazide konnten dargestellt werden (in Klammern: Ausb. in %): 5-Diazobarbitursaure (84), 4-Diazo-3-phenylisoxazol-5-on (77), 4-Diazo-l-phenyl-3-methyl-pyrazol-5-on (96), 2-Diazo-indan-1.3-dion (84), 2-Diazo-dimedon (77), a-Diazo-w-cyanoacetophenon (SS), 1-Diazo-naphtht-2-01 (21), 2.4-Bis-diazoresorcin (31) und Tris-diazo-phloroglucin (95). Der Mechanismus der Ubertragungsreaktionwurde diskutiert. Zur Existenz von Erdalkali-oxyapatiten, M10(X0&0 H. Bauer (Vortr.) und W. Bulz, Karlsruhe Nach orientierenden Versuchen [4] zerfallt Bariumphosphathydroxylapatit im Vakuum (-10-3 Torr) bei 1000 "C nach: Balo(P04)6(OH)z = 3 BadPo& + BaO + HzO.

Angewandte Chemie, 1980

0.95 g (1.49 mmol) (f) werden in 25 ml THF mit einem Kaliumspiegel [0.22 g (5.64 mmol)] 64 h umge... more 0.95 g (1.49 mmol) (f) werden in 25 ml THF mit einem Kaliumspiegel [0.22 g (5.64 mmol)] 64 h umgesetzt. Uberschiissiges Kalium wird abgetrennt, und zur Losung werden 0.4 g (1.49 mmol) FeC12.2THF gegeben. Nach 16 h Riihren und Abziehen von THF wird mit Toluol(20 ml) aufgenommen, filtriert, auf 5 ml eingeengt und 16 h bei-78 "C belassen. Ausbeute 0.5 g (53%) (4) als schwarze Nadeln, Fp=209-211 "C (Zers.). Analog wird (5) erhalten (0.4 g, 42%); F p = 218 "C (Zers.).

Angewandte Chemie International Edition in English, 1980

ml) at room temperature. 20 ml of 50% NaOH was added dropwise to the vigorously stirred solution;... more ml) at room temperature. 20 ml of 50% NaOH was added dropwise to the vigorously stirred solution; after a further 5 min the solution turned yellowish-brown. The solution was treated with 11 mmol of methyl iodide, stirred for 10 min, and then poured into an ether/ice mixture (150 m1/50 g). The aqueous phase was separated off and extracted with ether. The combined organic extracts were dried over MgS04, treated with activated charcoal, filtered, and the solvent removed in a vacuum. A yellowish oily residue crystallized on cooling. Recrystallization from ether/n-hexane furnished (4) in 90% yield as colorless crystals of m. p. 73-75 "C. (2): 1 g (2.98 mmol) of (4) was completely decomposed (ca. 4-6 h) by Tschugaeff pyroly~is'~] (170-180 "C/12 torr). Column chromatographic separation (ethylacetate/n-hexane 1 : 3) afforded (5) (64%) as colorless oil and its 4,5-didehydro isomer (5%) together with some (3) (6%).-A solution of (5) (0.5 g, 2.2 mmol) in 15 ml HzO/dioxane (1 : 1) was hydrolyzed (2 hours) with 5 ml of 50% NaOH. The solvent was removed in a vacuum and the crude product recrystallized from ether/n-hexane; yield 0.328 g (2), m.p. 92-95°C; [ a ] g =-249.8 (c=1.04 in MeOH)"'.

Advances in Astronomy, 2013

We present a new redshift (RS) versus photon travel time () test including 171 supernovae RS data... more We present a new redshift (RS) versus photon travel time () test including 171 supernovae RS data points. We extended the Hubble diagram to a range of z = 0,0141-8.1 in the hope that at high RSs, the fitting of the calculated RS/ diagrams to the observed RS data would, as predicted by different cosmological models, set constraints on alternative cosmological models. The Lambda cold dark matter (ΛCDM), the static universe model, and the case for a slowly expanding flat universe (SEU) are considered. We show that on the basis of the Hubble diagram test, the static and the slowly expanding models are favored.

International Journal of Astronomy and Astrophysics, 2017

Current progress in cosmic microwave background (CMB) anisotropy measurements opens up the possib... more Current progress in cosmic microwave background (CMB) anisotropy measurements opens up the possibility of determining Hubble's constant (H 0 = h × 100 km s −1 Mpc −1) from the CMB power spectrum radiation temperature anisotropy. The results show that, besides the Lambda cold dark matter (ΛCDM) model, much simpler Einstein-de Sitter (EdeS) models without the cosmological constant can fit the data as well, or even better, than the ΛCDM model. Calculations with EdeS models yield unexpectedly low values for Hubble's constant of h = 0.30 and 0.46, respectively. These values are completely inconsistent with the direct determination of h ~ 0.70 from the redshift (RS) of spectral lines. In the present paper I consider whether the gap between h = 0.3 and h = 0.7 could be explained using conventional physics without introducing further hypotheses, or whether the RS of starlight and the RS of the CMB could stem from different physical origins.

The standard cosmological model rests on a never-ending array of hypotheses and assumptions (dark... more The standard cosmological model rests on a never-ending array of hypotheses and assumptions (dark matter, dark energy and others) which either cannot be proved or, although theoretically possible, cannot yet be proved experimentally. This lack of secure knowledge raises legitimate doubts over the validity of the Big Bang model, which therefore cannot be seen as the ultimate answer to the question of the emergence and evolution of the universe. If the search for dark matter and dark energy turns out to be unsuccessful, the whole construction will break down and we will unavoidably face the question of which of the many different models based on Einstein’s field equations represents the real world.

viXra, 2017

In this paper, I reconsider the interpretation of Hubble’s Law as recession velocity of distant g... more In this paper, I reconsider the interpretation of Hubble’s Law as recession velocity of distant galaxies, in association with novel theories of the physical properties of the quantum vacuum, by assuming thermalization of starlight into a homogeneous black-body energy distribution. I present scientific theories and experimental results supporting the assumption that the proposed equilibration process might take place without any material mediator. The equilibration follows from the interaction between quantum states of the excited spacetime entity, and therefore, energy equilibration has to be looked at as a natural quantum physical process, instead of as a physically unlikely one. Cosmological implications of the presented theory are discussed.

In situ X‐ray diffraction (XRD) investigations of the structural changes of Cs1H3PVMo11O40 Keggin... more In situ X‐ray diffraction (XRD) investigations of the structural changes of Cs1H3PVMo11O40 Keggin type heteropolyacid catalysts show that during the methacrolein (MA) to methacrylic acid (MAA) oxidation reaction the crystallites of the HPA disintegrate to small crystallites of about 10 nm in size. When turning the MA supply repeatedly on and off the observed broadening of the diffraction lines appears and disappears in a rather reversible and reproducible way indicating that the disintegration of the crystallites must be attributed to the catalytic interaction between MA and the HPA catalyst. The reported effect shows some similarities to the formation of the so‐called quasiliquid phase by the interaction of H3PW12O40 with polar organic molecules like pyridine or methanol. Presented results suggest that under the conditions of the catalytic reaction MA molecules penetrate into the intracrystalline pore system of the HPA and thus the participation of a quasiliquid phase in the catalytic reaction.

International Journal of Astronomy and Astrophysics

It is generally accepted that the history of the expansion of the universe can be exactly describ... more It is generally accepted that the history of the expansion of the universe can be exactly described by the concordance model, which makes specific predictions about the shape of the Hubble diagram. The redshift-magnitude Hubble diagram in the redshift range z = 0.0104-1 seems to confirm this expectation, and it is believed that this conformity is also valid in the high redshift range. However, this belief is not undisputed. Recent work in the high redshift range of up to z = 8.1 has shown that the shape of the Hubble diagram deviates considerably from the predictions made by the Lambda cold dark matter model. These analyses, however, were based on mixed SN1a and gamma ray burst data, and some astronomers argue that this may have biased the results. In this paper, 109 cosmology-independent, calibrated gamma ray burst z/μ data points are used to calculate the Hubble diagram in the range z = 0.034 to z = 8.1. The outcome of this analysis confirms prior results: contrary to expectations, the shape of the Hubble diagram turns out to be exponential, and this is difficult to explain within the framework of the standard model. The cosmological implications of this unexpected result are discussed.