Proton--induced deuteron breakup at GeV energies with forward emission of a fast proton pair

A study of the deuteron breakup reaction $pd \to (pp)n$ with forward emission of a fast proton pair with small excitation energy $E_{pp}<$ 3 MeV has been performed at the ANKE spectrometer at COSY--J\"ulich. An exclusive measurement was carried out at six proton--beam energies $T_p=$~0.6,~0.7,~0.8,~0.95,~1.35, and 1.9 GeV by reconstructing the momenta of the two protons. The differential cross section of the breakup reaction, averaged up to $8^{\circ}$ over the cm polar angle of the total momentum of the $pp$ pairs, has been obtained. Since the kinematics of this process is quite similar to that of backward elastic $pd \to dp$ scattering, the results are compared to calculations based on a theoretical model previously applied to the $pd \to dp$ process.Comment: 17 pages including 6 figures and 1 table v2: minor changes; v3: minor change of author list; v4: changes in accordance with referee remark

Monte Carlo integration in Glauber model analysis of reactions of halo nuclei

Reaction and elastic differential cross sections are calculated for light nuclei in the framework of the Glauber theory. The optical phase-shift function is evaluated by Monte Carlo integration. This enables us to use the most accurate wave functions and calculate the phase-shift functions without approximation. Examples of proton nucleus (e.g. p-$^6$He, p-$^6$Li) and nucleus-nucleus (e.g. $^6$He$-^{12}$C) scatterings illustrate the effectiveness of the method. This approach gives us a possibility of a more stringent analysis of the high-energy reactions of halo nuclei.Comment: 20 pages, 8 figure

Common Genetic Denominators for Ca++-Based Skeleton in Metazoa: Role of Osteoclast-Stimulating Factor and of Carbonic Anhydrase in a Calcareous Sponge

Calcium-based matrices serve predominantly as inorganic, hard skeletal systems in Metazoa from calcareous sponges [phylum Porifera; class Calcarea] to proto- and deuterostomian multicellular animals. The calcareous sponges form their skeletal elements, the spicules, from amorphous calcium carbonate (ACC). Treatment of spicules from Sycon raphanus with sodium hypochlorite (NaOCl) results in the disintegration of the ACC in those skeletal elements. Until now a distinct protein/enzyme involved in ACC metabolism could not been identified in those animals. We applied the technique of phage display combinatorial libraries to identify oligopeptides that bind to NaOCl-treated spicules: those oligopeptides allowed us to detect proteins that bind to those spicules. Two molecules have been identified, the (putative) enzyme carbonic anhydrase and the (putative) osteoclast-stimulating factor (OSTF), that are involved in the catabolism of ACC. The complete cDNAs were isolated and the recombinant proteins were prepared to raise antibodies. In turn, immunofluorescence staining of tissue slices and qPCR analyses have been performed. The data show that sponges, cultivated under standard condition (10 mM CaCl2) show low levels of transcripts/proteins for carbonic anhydrase or OSTF, compared to those animals that had been cultivated under Ca2+-depletion condition (1 mM CaCl2). Our data identify with the carbonic anhydrase and the OSTF the first two molecules which remain conserved in cells, potentially involved in Ca-based skeletal dissolution, from sponges (sclerocytes) to human (osteoclast)

SPECTROSCOPIC STUDIES OF COMPLEX COMPOUNDS OF COBALT(III) -NICKEL(II) WITH DIETANOLAMINE

Polynuclear complex compounds of 3d metals with amino alcoholic ligands can be used to obtain effective electrocatalysts for the process of lithium intercalation in graphite from organic aprotic electrolytes, occurring in lithium ion current sources. The processes of formation of the innercomplex compound of cobalt (III) with diethanolamine and the heteronuclear complex 2Co-Ni with diethanolamine have been investigated using IR spectroscopy and electronic spectra of absorption spectra in the UV and visible regions of the spectra. Summing up the study by the method of electronic absorption spectra, one can emphasize the presence in the process of formation of complex compounds of the bathochromic displacement of the maxima of d-d absorption bands of cobalt, which uniquely indicates the process of complex formation of the hetero-metallic compound. The composition of the coordination compounds obtained was determined using chemical analysis, whose results are well correlated with the theoretically calculated content of chemical elements. The probability of passage of complex formation reactions with the preservation of CoO4N2 cobalt coordination environment in the innercomplex complex compound of cobalt (III) and the polynuclear coordination compound [Ni(CoDetmHdetm)2](NO3)2, was confirmed, namely by the close assignment of characteristic-deformation-sensitive complexes fluctuations δas (CH) spectra chelate compounds of cobalt (III) and threenulear hetero-metallic complexes. The obtained results confirm the previous quantum-chemical calculations of the coordination node of the quadrgular 2Co-Ni complex with diethanolamine, which resulted in the assumption of the formation of four bridge connections of Co3+ ... O ... Ni2+ in the formation of a heterometal coordination compound [Ni(CoDetmHdetm)2](NO3)2

СПЕКТРОСКОПІЧНІ ДОСЛІДЖЕННЯ КОМПЛЕКСНИХ СПОЛУК КОБАЛЬТУ(ІІІ)-НІКЕЛЮ(ІІ) З ДІЕТАНОЛАМІНОМ

Polynuclear complex compounds of 3d metals with amino alcoholic ligands can be used to obtain effective electrocatalysts for the process of lithium intercalation in graphite from organic aprotic electrolytes, occurring in lithium ion current sources. The processes of formation of the innercomplex compound of cobalt (III) with diethanolamine and the heteronuclear complex 2Co-Ni with diethanolamine have been investigated using IR spectroscopy and electronic spectra of absorption spectra in the UV and visible regions of the spectra. Summing up the study by the method of electronic absorption spectra, one can emphasize the presence in the process of formation of complex compounds of the bathochromic displacement of the maxima of d-d absorption bands of cobalt, which uniquely indicates the process of complex formation of the hetero-metallic compound. The composition of the coordination compounds obtained was determined using chemical analysis, whose results are well correlated with the theoretically calculated content of chemical elements. The probability of passage of complex formation reactions with the preservation of CoO4N2 cobalt coordination environment in the innercomplex complex compound of cobalt (III) and the polynuclear coordination compound [Ni(CoDetmHdetm)2](NO3)2, was confirmed, namely by the close assignment of characteristic-deformation-sensitive complexes fluctuations δas (CH) spectra chelate compounds of cobalt (III) and threenulear hetero-metallic complexes. The obtained results confirm the previous quantum-chemical calculations of the coordination node of the quadrgular 2Co-Ni complex with diethanolamine, which resulted in the assumption of the formation of four bridge connections of Co3+ ... O ... Ni2+ in the formation of a heterometal coordination compound [Ni(CoDetmHdetm)2](NO3)2.Методами ІЧ-спектроскопії і електронних спектрів поглинання в УФ та видимій областях спектру досліджено процеси утворення внутрішньокомплексної сполуки кобальту(ІІІ) з діетаноламіном та гетероядерного комплексу 2Co-Ni з діетаноламіном. Встановлено ймовірність проходження реакцій комплексоутворення та збереження координаційного оточення кобальту CoO4N2 у внутрішньо комплексній сполуці кобальту(ІІІ) та поліядерній координаційній сполуці [Ni(CoDetmHdetm)2](NO3)2.