ケララコンダーライト帯における高度変成岩の岩石学的・年代学的研究 : 部分溶融過程およびその熱源への寄与

博士(理学)大阪市立大

Using Rheo-Small-Angle Neutron Scattering to Understand How Functionalised Dipeptides Form Gels

We explore the use of rheo-small-angle neutron scattering as a method to collect structural information from neutron scattering simultaneously with rheology to understand how low-molecular-weight hydrogels form and behave under shear. We examine three different gelling hydrogel systems to assess what structures are formed and how these influence the rheology. Furthermore, we probe what is happening to the network during syneresis and why the gels do not recover after an applied strain. All this information is vital when considering gels for applications such as 3D-printing and injection

A comparative study of the electrochemical properties of vitamin B-6 related compounds at physiological pH

A comparative study of vitamin B6 group and related compounds in buffered solutions using electrochemical techniques has been performed at neutral pH. Irreversible bi- or tetra-electronic processes are observed for these substances, and the electron transfer coefficient (αn) calculated. It was concluded that either the first or second electron transfer were the rate determining step of the electrode process. The diffusion coefficient of these substances was calculated and the values given follow an inverse tendency to the molecular size. For aldehydes the values obtained were corrected of the hydration reaction. It is important to remark that catalytic waves were reported for the first time for these compounds. Using a model involving the nitrogen of the basic structure the kinetic constants were calculated for most of them

Using chirality to influence supramolecular gelation

Most low molecular weight gelators are chiral, with racemic mixtures often unable to form gels. Here, we show an example where all enantiomers, diastereomers and racemates of a single functionalized dipeptide can form gels. At high pH, different self-assembled aggregates are formed and these directly template the structures formed in the gel. Hence, solutions and gels with different properties can be accessed simply by varying the chirality. This opens up new design rules for the field

Lithium storage mechanisms in purpurin based organic lithium ion battery electrodes

Current lithium batteries operate on inorganic insertion compounds to power a diverse range of applications, but recently there is a surging demand to develop environmentally friendly green electrode materials. To develop sustainable and eco-friendly lithium ion batteries, we report reversible lithium ion storage properties of a naturally occurring and abundant organic compound purpurin, which is non-toxic and derived from the plant madder. The carbonyl/hydroxyl groups present in purpurin molecules act as redox centers and reacts electrochemically with Li-ions during the charge/discharge process. The mechanism of lithiation of purpurin is fully elucidated using NMR, UV and FTIR spectral studies. The formation of the most favored six membered binding core of lithium ion with carbonyl groups of purpurin and hydroxyl groups at C-1 and C-4 positions respectively facilitated lithiation process, whereas hydroxyl group at C-2 position remains unaltered

The impact of capital structure on Islamic Finance Development Indicador (IFDI): A cross-country analysis

The aim of this paper is to examine the effect of the capital structure on the financial development of Islamic banks. To measure Islamic financial development, we use the country-level Refinitiv Islamic Finance Development Indicator® (IFDI) during the years 2014 to 2019. The global or combined IFDI score is made up of five performance dimensions that are considered by Islamic investors: Quantitative Development, Governance, Corporate Social Responsibility, Awareness and Knowledge. Using a sample of 105 banks, covering banking systems in 19 Muslim-majority countries, the study uses a Two-Stage least squares (2SLS) regression to examine the banks\u27 financial development determinants to control IFDI\u27s reverse causality for capital structure. Aftercontrolling the macroeconomic environment, financial market structure and taxation, the results indicate that the development of banks responds positively to an increase in equity (capital ratio). The result is consistent with the signaling theory, which predicts that the best performing banks will reliably transmit this information through higher capital. The non-monotonic relationship found between financial development on shareholders \u27equity and banks\u27 capital ratios suggests that issues of shares with low capital ratios (less than 48.42%) are expensive and have a negative effect on their equity indicator. development.On the other hand, well-capitalized bank managers are advised to trust equity when faced with the decision to raise capital, as the capital ratio begins to positively affect their financial development. This study aimed to fill the gap between the capital structure of Islamic banks and their relationship with a five-dimensional indicator. Future research, however, could confront the capital structure of banks with their profitability or profitability (conventional measures and used by Western banks), as well as analyze the effect of each of the dimensions that make up the IFDI, by bank or by country on decision of their structures

Tetra-μ-2,5-difluoro­benzoato-bis­[(2,2′-bipyridine)(2,5-difluoro­benzoato)gadolinium(III)]

In the centrosymmetric title compound, [Gd2(C7H3F2O2)6(C10H8N2)2], the asymmetric unit comprises one cation chelated by two 2,5-difluoro­benzoate and one 2,2′-bipyridine. Two cations are linked into dimers via three bridging carboxyl­ate groups from three 2,5-difluoro­benzoic acid units. The GdIII ion is nine-coord­inated by seven O atoms and two N atoms

catena-Poly[[aqua­{4-[N′-(2,4-dioxo-3-pentyl­idene)­hydrazino]­benzoato}­copper(II)]-μ-acetato]

In the title compound, [Cu(CH3CO2)(C12H11N2O4)(H2O)]n, the CuII cation is tetra­coordinated by three carboxyl­ate O atoms from one 4-[N′-(2,4-dioxo-3-pentyl­idene)­hydrazino]­benzoate ligand and two acetate bridges, and by one water mol­ecule. The acetate bridges link adjacent CuII cations, forming a chain. The crystal structure involves O—H⋯O hydrogen bonds

Tetra­aqua­bis[(1-carboxyl­atomethyl-1,3-benzimidazol-3-ium-3-yl)acetato-κO]palladium(II) dihydrate

In the title compound, [Pd(C11H9N2O4)2(H2O)4]·2H2O, the palladium(II) cation lies on an inversion centre and is hexa­coordinated by two carboxyl­ate O atoms from two (1-carboxyl­atomethyl-1,3-benzimidazol-3-ium-3-yl)acetate ligands and four water mol­ecules, with a slightly distorted octa­hedral geometry. O—H⋯O hydrogen bonds link the mol­ecules together