Stereoselective syntheses of deuterium labelled marmesins 3a-3e as metabolic probes for biosynthetic studies are described. Starting from iodo-umbelliferone (5), the title compounds were readily available by copper catalysed alkylation-cyclisation and subsequent transfer-hydrogenation of the res...
The study tested two parsley (Petroslinum crispum) cultivars, ‘Janet’ (resident) and ‘Hazera’ (susceptible), that differ in their response to the fungus Botrytis cinera Pers. During the 4 days after inoculation with B. cinerea, at 24 °C, concentrations of (+)marmesin in leaves sampled from ...
In the present study, we investigated the effects and molecular mechanism of marmesin, a coumarin compound isolated from Broussonetia kazinoki, on vascular endothelial growth factor-A (VEGF-A)-induced endothelial cell responses in vitro and angiogenic sprouting in aortic rings ex vivo. Marmesin ...
Lanthanum hexaboride is an interesting compound in view of its thermoemissive properties. So far, it has usually been prepared in the form of very small crystals. Preparation of single crystals is essential for the studies of its basic properties. Two methods have been used to crystallize this c...
The availability of K, essential for plant growth, from syenite (a silicate rock in which potassium feldspar is the dominant mineral; > 90 wt%), and phlogopite mica has been demonstrated using carefully designed plant growth pot experiments in which the only added source of K was the mineral of ...
Nanobamboo and nanotube structures of BN have been controllably synthesized by reaction of barium metaborate with ammonia. The gallium addition plays an important role in the formation of nanotubes. The experimental results indicate that, without the gallium additive, the reaction results in the...
This study aims at the investigation of a suitable catalyst for the electrochemical reduction mechanism of metaborate into borohydride with the hope of the construction of rechargeable direct borohydride/peroxide fuel cell. A passive direct borohydride/peroxide fuel cell with Ag anode and Pt/C c...
Boron trioxide, boron nitride, boron carbide and elemental boron giving different boron surface densities have been used as neutron shields in epithermal neutron activation determinations. Boron ratios and advantage factors for 29 nuclides have been determined. A new expression of the advantage ...
The effect of inserting a molybdenum oxide (MoO3) anode buffer layer into organic solar cells based on various electron donor materials was studied. The device was composed of an indium tin oxide (ITO)/MoO3/donor material/C60/bathocuproine/aluminum structure, and the donor materials were boron s...
An atmospheric pressure, solution-assisted substitution process has been developed to produce boron-doped carbon nanotubes (BCNTs) with tunable boron dopant concentrations precisely from atomic percent of 0.4–3.9% by controlling the reaction conditions. The systematic material characterizations...
The evidence of a new polytypic phase was demonstrated in double doped gadolinium aluminum borate (GAB) crystals grown by the high temperature top seeded solution growth (HTTSSG) method. The structures of the rhombohedral and the new monoclinic phases in the Eu0.02Tb0.12Gd0.86Al3(BO3)4 and Eu0.1...
The Er3+-doped gadolinium calcium silica borate glasses of composition (55-x) B2O3 – 10 SiO2 – 25 Gd2O3 – 10 CaO – x Er2O3, where x = 0.0, 0.5, 1.0, 1.5, 2.0 and 2.5 mol %, have been prepared by conventional melt quenching technique and are characterized through optical absorption, visible a...
Infrared spectra of gadolinium–lead–borate glasses of the xGd2O3·(100 − x)[3B2O3·PbO] system, where x = 0, 5, 10, 15, 25, 35 and 50 mol.%, have been recorded to explore the role of content of gadolinium ions behaving as glass modifier.The FTIR spectroscopy data for the xGd2O3·(1 − x)[3B2O3·...
The Nd3+-doped gadolinium calcium silica borate (BSGdCaNd) glasses of composition (55-x) B2O3 - 10 SiO2 - 25 Gd2O3 -10 CaO -x Nd2O3, where x = 0.0, 0.05, 0.5, 1.0, 1.5, 2.0 and 2.5 mol %, have been prepared by conventional melt quenching technique and are characterized through structural, therma...
A remarkable characteristic of borate glasses is the ability of forming magnetic nanoparticles at low doping with transition element oxides. We have studied structure and magnetic properties of iron oxide nanoparticles formed in borate glasses, in particular, concentration and temperature depend...
The systematic investigations concerning the bioconjugation of GdBO3-Fe3O4 nanocomposite and their in vitro biocompatibility with cancer cell lines are reported. The nanocomposites were prepared hydrothermally from magnetite (Fe3O4), borax or boric acid and a Gd3+ salt. Bioconjugation processes ...
In this work molecular cluster calculations are performed using density functional theory to study new complexes of gadolinium borates and oxyanions. Hyperhalogen behavior is predicted for the Gd(BO2)4 cluster, which has a calculated electron affinity of 6.67 eV and a ground state spin multiplic...
The contribution reports on molecular dynamics simulation were used to understand, at the molecular level, the interaction of molybdenum, gadolinium and europium ions with neighboring oxygen. Molecular dynamics simulations were carried out to evaluate the bond distance between Gd–Eu and Mo–Eu ...
Gadolinium-based borate glasses doped with Dy3+ ions were developed by melt quenching technique for white light generation. The title glasses were examined by XRD, optical absorption spectra and Photoluminescence spectra. From photoluminescence emission spectra, the higher intensity peak was obs...
Soft ferromagnetic magnetite (Fe3O4)-gadolinium borate nanocomposites have been prepared via a facile hydrothermal approach by using Fe3O4, borax (BX) or boric acid (BA) and a simple Gd(III) salt. The products obtained by depositing GdBO3 over Fe3O4 nanoparticles were analyzed by powder X-Ray Di...
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