Search results for "Raphe"
showing 10 items of 839 documents
GraphoLearn India : The Effectiveness of a Computer-Assisted Reading Intervention in Supporting Struggling Readers of English
2018
India, a country with a population of more than 1.3 billion individuals, houses the world’s second largest educational system. Despite this, 100 of millions of individuals in India are still illiterate. As English medium education sweeps the country, many are forced to learn in a language which is foreign to them. Those living in poverty further struggle to learn English as it tends to be a language which they have no prior exposure to and no support at home for. Low-quality schools and poor instructional methods further exacerbate the problem. Without access to quality education, these individuals continue to struggle and are ultimately never given the chance to break the cycle of poverty.…
Pulicaria glutinosa plant extract: a green and eco-friendly reducing agent for the preparation of highly reduced graphene oxide
2014
The environmentally friendly synthesis of nanomaterials using green chemistry has attracted tremendous attention in recent years due to its easy handling, low cost, and biocompatibility. Here we demonstrate a facile and efficient route for the synthesis of highly reduced graphene oxide (PE-HRG) by the green reduction of graphene oxide (GRO) using the Pulicaria glutinosa plant extract (PE). The phytomolecules present in the P. glutinosa extract are not only responsible for the reduction of GRO, but also for the functionalization of the surface of the PE-HRG nanosheets and stabilize them in various solvents, thereby limiting the use of any other external and harmful chemical reductants and su…
Der Schwartzen Haupten Bruder Buch [Tallinas Melngalvju brālības goda biedru grāmata]
1711
Tallinas Melngalvju brālības goda biedru grāmata Ms.1213 Der Schwartzen Haupten Bruder Buch. [Reval, 1711.26.XII - 1939.27.X]. Tinte; papīrs, pergaments (lpp.118b, 125b). [4], 263, [3] lpp.; zīm.,kaligrāfiski rakstīta titullapa. Tukšas lpp: 30, 60, 125b, 126b, 127b, 130b, 133b, 154a, 160-229, [3] lpp. beigās.; alfab. personu reģistrs 230-263.lpp. Bojājumi, papīra plīsumi. Izgriezts gabals S.261. 41 x 15,5 x 4,2 cm LUAB. Inv. nr.R5097 RPB inv.nr. 36094 Sākumlapā attēli: Krievijas impērijas ģerbonis; Tallinas Melngalvju brālības ģerbonis. Tuša, akv. Titullapas teksts rakstīts ar tinti, dekoratīvi, kā grezns, filigrāns kaligrāfijas darbs. Paginācija vēlāka, nekonsekventa. Grāmatai pievienots W…
From determination of the fugacity coefficients to estimation of hydrogen storage capacity: A convenient theoretical method
2015
Abstract The equation of state (EOS) from virial expansion (VE) is used in this work to pave the way for determining the fugacity coefficients of the hydrogen fluid at arbitrary temperature and pressure. The fugacity coefficients from our VE method have more physical meanings than the empirical values. In this way, the hydrogen storage capacity of a novel material model can be estimated by using few density functional theory (DFT) calculations with the aid of a continuum model. The efficient continuum model can provide a more accurate estimation of the hydrogen storage capacity than the pure DFT calculations. Furthermore, the expensive grand canonical ensemble (μNT) simulations combining wi…
H2 hitting on graphene supported palladium cluster: molecular dynamics simulations
2016
Dissociative adsorption of impinging gas-phase molecular hydrogen (H2) on a palladium cluster (Pd4) supported on defective graphene (C47) was studied by periodic density functional theory molecular dynamics simulations. The H2 on Pd4/C47 collision dynamics were investigated without any particular constraint, except for the Born–Oppenheimer approximation. The study, which had mostly method-testing aims, provided, anyway, valuable information about the collision kinetics of gas-phase molecular hydrogen. This was treated as an impacting projectile having different kinetic energy values. At lower kinetic energies, sticking was ruled by steering effects imputable to the Pd cluster that easily re…
A Highly Luminescent Nitrogen-Doped Nanographene as an Acid- and Metal-Sensitive Fluorophore for Optical Imaging.
2021
Dibenzo[hi,st]ovalene (DBOV) has excellent photophysical properties, including strong fluorescence and high ambient stability. Moreover, the optical blinking properties of DBOV have enabled optical super-resolution single-molecule localization microscopy with an imaging resolution beyond the diffraction limit. Various organic and inorganic fluorescent probes have been developed for super-resolution imaging, but those sensitive to pH and/or metal ions have remained elusive. Here, we report a diaza-derivative of DBOV (N-DBOV), synthesized in eight steps with a total yield of 15%. Nitrogen (N)-bearing zigzag edges were formed through oxidative cyclization of amino groups in the last step. UV-v…
Cytoarchitecture and efferent projections of the nucleus incertus of the rat
2003
The nucleus incertus is located caudal to the dorsal raphe and medial to the dorsal tegmentum. It is composed of a pars compacta and a pars dissipata and contains acetylcholinesterase, glutamic acid decarboxylase, and cholecystokinin-positive somata. In the present study, anterograde tracer injections in the nucleus incertus resulted in terminal-like labeling in the perirhinal cortex and the dorsal endopyriform nucleus, the hippocampus, the medial septum diagonal band complex, lateral and triangular septum medial amygdala, the intralaminar thalamic nuclei, and the lateral habenula. The hypothalamus contained dense plexuses of fibers in the medial forebrain bundle that spread in nearly all n…
CO2 and CH2 Adsorption on Copper-Decorated Graphene: Predictions from First Principle Calculations
2022
Calculations were performed using Latvian Super Cluster (LASC), located in Center of Excellence at Institute of Solid State Physics, the University of Latvia, which is supported by European Union Horizon2020 Framework Programme H2020-WIDESPREAD-01-2016-2017-TeamingPhase2 under Grant Agreement No. 739508, project CAMART2. The authors would like to express their gratitude for funding from the European Union’s Horizon 2020 research and innovation programme under grant agreement No 768789 (CO2EXIDE project). In the last stage of investigation and during the preparation of the publication, the authors were assisted by the postdoc D.B. with his own funding from project No. 1.1.1.2/VIAA/l/16/147 (…
Graphene-type sheets of Nb(1-x)W(x)S2: synthesis and in situ functionalization.
2013
Enlightened by the discovery of graphenes, a variety of inorganic analogues have been synthesized and characterized in recent years. Solvated Nb1−xWxS2 analogues of graphene-type sheets were prepared by lithiation and exfoliation of multistacked Nb1−xWxS2 coin roll nanowires (CRNWs), followed by in situ functionalization with gold nanoparticles to synthesize gold-loaded Nb1−xWxS2/Au nanocomposites. The Nb1−xWxS2 nanosheets and the corresponding Nb1−xWxS2/Au nanocomposites were characterized by high resolution electron microscopy (HRTEM), energy-dispersive X-ray spectroscopy (EDX), scanning transmission electron microscopy (STEM), dynamic light scattering (DLS) and scanning force microscopy …
Thermische Cycloadditionen von 1,2‐Dihydropentalen
1989
1,2-Dihydropentalen (1) ist ein gekreuzt konjugiertes 6π-Elektronensystem, das in thermischen Cycloadditionen als 2π-, 4π- oder 6π-Komponente fungieren kann. Es werden die Additionen an Tetraphenylcyclopentadienon (1+23), N-Phenylmaleinimid (1+45) und Tropon (1+68 bzw. 10) beschrieben. Auf der Basis von MNDO-Rechnungen werden Peri-, Regio- und Stereoselektivitat anhand von primaren und sekundaren Orbitalwechselwirkungen diskutiert. Thermal Cycloaddition of 1,2-Dihydropentalene 1,2-Dihydropentalene (1) is a cross-conjugated 6π-electron system, that can act in thermal cycloaddition processes as a 2π, 4π, or 6π component. The addition reactions with tetraphenylcyclopentadienone (1+23), N-pheny…