Miracle-dz/UniFAR-FTUs huggingface dataset:
Exploring Synthesis Techniques for Yttrium Based Phosphors

In recent years, the term ‘smart materials’ which means the potential of a material having novel functional abilities, has become a buzz word. Luminescent materials held a lion’s share amongst all functional materials. The research in these materials is nowadays becoming the frontline platform and has challenging options for the betterment of society. These materials have applications in diverse fields such as, radiation detection, monitoring and assessment, display devices (PDP, CRT, CTV, LCD, FPD, etc.), and Lighting devices (CFL, Hg Free lamps using VUV Xenon, Solid State lighting (SSL-LED blue chips, UV-LEDs, O-LEDs, etc.). The main and essential role is being played by the phosphors. The activity of the phosphor is also depending on the particle size and hence the nanophase phosphor developments are very important aspect of development of functional materials. It is also very much clear now that the method of synthesis controls/decides a particle size of the final product. A particular method is better for a specific phosphor for getting the desired particle size of the final product. Scaling is also very much essential for instituting the specific method of synthesis for desired phosphor. These aspects are important for commercial production.Looking at the applications specified in first paragraph, one thing is common which is red correction required for display devices or lighting devices. The red correction in full-colour display/white light emission is essentially done by using Y2O3:Eu3+ phosphor or Eu3+ doped yttrium based hosts. Red emission is of Eu3+ (5D0 →7Fj, where j could be predominantly 2, 1, 3) when symmetrically organized environment. In this context, the review of yttrium based phosphors is being presented. This also covers our experience in synthesis of yttrium based luminescent materials with different methods of synthesis and their comparative aspects with regard to luminescence properties.Contents of Paper
Dye-Affinity Partitioning of Acidic, Basic, and Neutral Proteins in Ionic Liquid-Based Aqueous Biphasic Systems

The partitioning behavior of model acidic (bovine serum albumin, BSA), basic (hen egg white lysozyme, LYS), and neutral (horse heart myoglobin, MYO) proteins in ionic liquid-based aqueous biphasic systems containing Reactive Red-120 dye has been reported. This study found that partition coefficients of the proteins depended on their chemical structures, pH of the aqueous phase, temperature, and composition of the aqueous biphasic system. It was found that partition coefficients of proteins in aqueous biphasic system containing RR-120 were in the order of LYS > MYO > BSA. Recovery of the hydrophilic ionic liquid, [C4mim]Br, was achieved by using hydrophobic ionic liquid, [C4mim]PF6.
Enhanced Electrical Conductivity by Macromolecular Architecture: Hyperbranched Electroactive and Degradable Block Copolymers Based on Poly(ε-caprolactone) and Aniline Pentamer

We present macromolecular architecture design as a useful tool to enhance the conductivity of degradable polymers. Linear and hyperbranched copolymers with electrical conductivity and biodegradability were synthesized by an “A2 + Bn (n = 2, 3, 4)” strategy using carboxyl-capped aniline pentamer (CCAP) and branched poly(e-caprolactone)s (PCLs) by coupling reactions. A more hydrophilic surface and lower crystallinity of the doped emeraldine state of aniline pentamer (EMAP) copolymer was achieved compared with PCLs, and TGA results demonstrated that the CCAP contents in the copolymers were almost the same. The structure of the polymers was characterized by FT-IR, NMR, and SEC. Good electroactivity of the copolymers was confirmed by UV and cyclic voltammetry (CV), and CV showed three pairs of redox peaks. The hyperbranched copolymers had a higher conductivity than the linear ones. It is suggested that the higher conductivity of the hyperbranched copolymer is due to the ordered distribution of peripheral EMAP .
PERCEPÇÃO DOS ATRIBUTOS DE SATISFAÇÃO DA QUALIDADE DOS SERVIÇOS CONTÁBEIS: UMA INVESTIGAÇÃO EMPÍRICA EM ORGANIZAÇÕES COMERCIAIS

O estudo investiga a percepcao de 41 organizacoes comerciais do municipio de Soledade-RS sobre a qualidade dos servicos prestados por empresas de servicos contabeis. Trata-se de um estudo descritivo, realizado por meio de levantamento e abordagem quantitativa dos dados. Os resultados encontrados indicam que os usuarios dos servicos contabeis encontram-se satisfeitos com os servicos prestados (declaracoes pessoa fisica e obrigacoes assessorias; servicos de consultoria organizacional; e, auditoria e pericia) ou muito satisfeitos (constituicao e organizacao de empresas; servicos de escrituracao contabil; fiscal; e, de pessoal; e servico de consultoria tributaria e fiscal). Os atributos determinantes dos niveis de satisfacao dos gestores participantes da pesquisa sao: 1° Confianca e Imagem; 2° Pontualidade no Atendimento; 3° Instalacoes Fisicas e Colaboradores do Escritorio; e, 4° Presteza no Atendimento. Conclui-se que a criacao de uma forte imagem pautada em uma boa reputacao; a confianca na organizacao e seus colaboradores; e, a agilidade na prestacao dos servicos, podem influenciar os niveis de satisfacao dos usuarios dos servicos contabeis.
The measurement of inositol polyphosphates in soil extracts by isotope dilution analysis

Abstract Fractionation of 0.3M LiOH soil extracts with added 32P myoinositol hexaphosphate, by the anion-exchange chromatography procedures used in previous studies of soil organic phosphorus, showed that recovery of 32P activity varied from 8–65 percent depending on the anion-exchange resin used. Isotope dilution analysis gave values for the inositol hexaphosphate content of 0.3M LiOR extracts of four topsoils, corrected for low recoveries during fractionation. Because of low resolution of the resin chromatography methods, myo-inositol penta phosphate and the pentaand hexa-phosphates of other inositol isomers present in the soil extracts are included in these values. From 86–100 percent of the organic phosphorus extracted from the topsoils was accounted for when the values for inositol polyphosphates obtained by isotope dilution were combined with values for the other fractions obtained by direct phosphorus analysis. Inositol phosphates represented 40–72 percent of the extracted soil organic phosphorus, .
Absorption corrections for diamond-anvil pressure cells implemented in the software package Absorb6.0

High-pressure single-crystal structure refinement requires intensity data that have been corrected for the various absorption effects in the pressure cell. In this contribution, the methods for calculating the absorption corrections for a transmission-geometry diamond-anvil pressure cell are reviewed. The ideas presented in this paper have been implemented in a software package for Microsoft Windows, Absorb6.0, available at http://www.crystal. vt.edu/.
Spray Cooling Process Factors and Quality Interactions During the Preparation of Microparticles Containing an Active Pharmaceutical Ingredient

The current work studies the spray-cooling process factors and quality interactions during the production of microparticulated solid dispersions containing piroxicam, polyethylene glycol 4000, and poloxamer 407. The Box-Behnken factorial design was used to evaluate the influence of the temperature of the molten dispersion, the percentage of poloxamer 407 in the sample, and dispersion feed rate on the microparticles. The dependent variables studied by this design were particle size, flow properties, drug content, and solubility. Microparticle characterization was done through X-ray powder diffraction, thermogravimetry, differential scanning calorimetry, Fourier transform infrared spectroscopy, scanning electron microscopy, and in vitro dissolution analysis. Statistical analysis showed that the factors studied in Box-Behnken factorial design significantly influenced (p < 0.05) the Carr index, the Hausner factor, and the solubility of these microparticles. The microparticles presented average diameter from 72 to 120 µm, moderate to excellent flowability, drug content between 77.5 to 99.2%, and an increase in solubility between 2.5- and 5.4-fold when compared to the solubility of the pure drug. In dissolution tests, more than 75.0% of the piroxicam present in the microparticles was released in just 2.5 minutes and the microparticles promoted a total release of the drug. In addition, microparticles increased both the release rate and the amount of drug released.
AN ASSESSMENT OF THE LONG-TERM STABILITIES OF CYANEX302 AND CYANEX301 IN SULFURIC AND NITRIC ACIDS

ABSTRACT Cyanex 302 and Cyanex 301 are recently available solvent-extraction reagents, the major components of which are the mono- and dithiosubstituted analogs of bis(2,4,4-trimethylpentyl)phosphinic acid, respectively. Sulfur substitution in the phosphinic acid increases the acidity of the extractants, and makes them particularly suited to the extraction of soft Lewis acids. Sulfur-containing dialkylphosphoric-acid extractants previously developed, however, are known to be very susceptible to oxidation and decomposition. To evaluate the extents of reagent decomposition which could reasonably be expected under normal plant operating conditions, this study examines the hydrolytic, chemical and thermal stabilities of Cyanex 302 and Cyanex 301 when subjected to extreme experimental conditions and prolonged periods of exposure to sulfuric and nitric acids. It is observed that concentrated sulfuric acid has no long-term detrimental effect on either of these reagents, but that the strongly oxidizing nature of .
Category Based Implementation of Web Crawler

-In present day scenario of hi-tech communication and vast availability of information, Internet is playing a major role the information store becomes more vast with usage of hyperlinks. So it becomes a necessary job to have some agent that can be used for retrieving information out of the deep web information store The information extracted thus should be relevant and should be achieved in less time . Using traditional web crawler for this purpose results in non-relevant data In this paper an approach is implemented where in user can categorize his crawling domain which reduces response time ultimately. Various existing approaches are explained first with their working basics.
APPLICATION OF CHIRALCEL OJ IN SUPERCRITICAL FLUID CHROMATOGRAPHY FOR THE RESOLUTION OF DIFFERENT GROUPS OF FREQUENTLY USED DRUG RACEMATES

Supercritical fluid chromatography was applied to evaluate the direct chiral discriminative properties of Chiralcel OJ, a tris(4-methylbenzoate) cellulose column towards frequently administered drugs. Two groups of acidic drugs, profen and barbiturate derivatives, and a few basic drugs of the benzodiazepine type were analysed. The effect on enantioselectivity of carbon dioxide when using methanol are acetonitrile as primary modifier was studied. Acetonitrile proved to be a good alternative for methanol, especially for the profen compounds that were not well resolved using methanol. The results were compared to normal phase chromatographic applications on the same column. SFC was not necessarily superior to high-performance liquid chromatography. Chirality 9:126–132, 1997. © 1997 Wiley-Liss, Inc.
Effect of growth interruptions on the light emission and indium clustering of InGaN/GaN multiple quantum wells

InGaN/GaN multiple quantum wells (MQWs) grown with various growth interruptions between the InxGa1−xN well and GaN barrier by metalorganic chemical vapor deposition were investigated using photoluminescence (PL), high-resolution transmission electron microscopy, and energy filtered transmission electron microscopy (EFTEM). The integrated PL intensity of the MQWs with growth interruptions is abruptly reduced compared to that of the MQW without growth interruption. Also, as the interruption time increases the peak emission shows a continuous blueshift. Evidence of indium clustering is directly observed both by using an indium ratio map of the MQWs and from indium composition measurements along an InGaN well using EFTEM. The higher-intensity and lower-energy emission of light from the MQW grown without interruption showing indium clustering is believed to be caused by the recombination of excitons localized in indium clustering regions and the increased indium composition in these recombination centers.
Conformational analysis of cyclic hexapeptides containing the D-Pro-L-Pro sequence to fix .beta.-turn positions

Two cyclic hexapeptides, cyclo(D-Pro-Pro-Gly-Arg-Gly-Asp) (1) and cyclo(D-Pro-Pro-Arg-Gly-Asp-Gly) (2), containing a D-Pro-Pro sequence introduced to define and fix the phase of a two-β-turn backbone were examined by proton NMR methods. The NMR data were used in constrained distance geometry conformation searches to identify the probable backbone conformations. The conformation searches were conducted using upper and lower bound constraints derived from observed nuclear Overhauser effects (NOEs) involving backbone protons and also using additional lower bound constraints from backbone and β-proton NOEs judged to be unobserved
Chemical parameters, biologically active polyphenols and sensory characteristics of some Italian organic wines

Abstract This paper describes 23 commercial Italian wines, made from organic grapes, by their chemical parameters, biologically active polyphenol concentrations and sensory analysis. Our data show inconsistent differences in the trans-resveratrol and p-coumaric acid contents in comparison with non-organic wine, with the exception of quercetin concentrations in Chianti samples. Furthermore, the chemical analyses and sensory data of organic wines did not significantly differ from those previously cited. In general the organic wines display satisfactory sensory properties such as flavour intensity, body and a general acceptance.
Nearly Free Electron State in Graphane Nanoribbon Superlattice

Nearly free electron (NFE) state has been widely studied in low dimensional systems. Based on first-principles calculations, we identify two types of NFE states in graphane nanoribbon superlattice, similar to those of graphene nanoribbons and boron nitride nanoribbons. Effect of electron doping on the NFE states in graphane nanoribbon superlattice has been studied, and it is possible to open a vacuum transport channel via electron doping.
Quality Characterisation of Crude Oils by Partial Least Square Calibration of NIR Spectral Profiles

The correlation of near infrared (NIR) spectral profiles of crude oils with total boiling point (TBP) assay and density has been studied. Fourteen partial least square (PLS) models were calibrated by a training set of 110 samples. The developed NIR methods have reproducibility limits equivalent to the American Society for Testing and Materials (ASTM) reference procedures. Predictive accuracy of the models was estimated from the root mean square error of prediction (RMSEP) using cross validation. The correlation coefficients were better than 0.98 in these calibrations indicating good model structure. Such a rapid, reliable and inexpensive quantitative method, which is sufficient to assess the potential quality of the crude oil, especially the product yield, is essential in today's competitive refining environment.
Effect of planting density and levels of nitrogen on yield and yield attributes of sweet Sorghum (Sorghum bicolor [L.] Moench) Varieties

The experiment was conducted in the research farm of A field experiment was conducted during rainy season, 2015 at the Research cum-Instructional Farm, Indira Gandhi Krishi Vishwavidylaya, Raipur (Chhattisgarh) to assess the potentiality of sweet sorghum [Sorghum bicolor (L.) Moench] varieties under different planting densities and levels of N fertilizers. The results revealed that yield and yield attributes were significantly influenced by varieties, levels of nitrogen and planting densities. Sweet sorghum variety SSV-84 registered significantly higher grain yield (16.64 q ha-1) with higher yield attributes, green biomass yield (24.80 t ha-1) and dry biomass yield (5.93t ha-1) compared to CSV 24SS but Harvest Index is higher in CSV 24SS. Plant density of 13.33 plants m-2 gave higher grain yield (18.33 q ha-1) with higher green biomass yield (25.77 t ha-1) and dry biomass yield (6.15 t ha-1) in comparison to lower planting density but yield attributes viz., No of grain/cob(1421.20), test weight (23.40 g), grain yield plant-1(19.97 g) and Harvest index (19.38) is higher in planting density of 11.11 plants m-2. Among different levels of N fertilizers, application of nitrogen at 120 kg N ha-1 recorded the highest grain yield (20.13 q ha-1) with higher yield attributes, green biomass yield (27.94 t ha-1) and dry biomass yield (6.70 t ha-1) are significantly higher than other levels of nitrogen but Harvest index is recorded highest in control plot for Nitrogen.
Zur Korrelation von 0-0-Übergängen, Absorptions- und Fluoreszenzmaxima mit σ-Hammett-Konstanten / The correlation of the 0-0-transitions and the maxima of absorption and fluorescence with theσ-Hammett constants.

Abstract The correlation of the 0-0-transitions and the maxima of absorption and fluorescence with the σ-Hammett constants. The correlation of the 0-0-transitions and the maxima of absorption and fluorescence with the ff-Hammett constants lead to conclusions concerning the changes in the gap of the state involved and their curvatures due to substitution. The formalism can be applied also using other LFER parameters than σ-Hammett constants.
Trace Elements in Different Pentaphylloides fruticosa Ecotypes

Abstract This paper presents new data on the content of the chemical elements in Pentaphylloides fruticosa (L.) O. Schwarz introduced into forest-steppe zone of West Siberia. Synchrotron radiation X-ray-fluorescence analysis (SRXFR) was performed for the plants of different ecotypes. The correlation between the level of accumulation of the elements in the plants and the conditions of their habitat has been established.
Production of hydroxyl radicals by iron solid compounds

The deleterious effects of radicals in biological systems are now admitted. The aim of the present work was to study the reduction of oxygen and hydrogen peroxide (H2O2) into hydroxyl radicals by selected iron compounds in a phosphate buffered solution. Radical detection has been carried out by electron spin resonance spectroscopy (ESR) with “spin trapping”; (5,5‐dimethyl‐1‐pyrroline N‐oxide, DMPO). The following minerals have been used: goethite (FeOOH a), akaganeite (FeOOH β), hematite Fe2O3α), magnetite (Fe3O4), siderite (FeCO3), and crocidolite fibres (Na2Fe3Si8O22(OH)2). Crocidolite and siderite reduced O2 into OH∗. Catalase inhibited this reduction. The reduction occurs at the mineral surface. When H2O2 was added to the buffer solution, goethite was inactive, akaganeite, magnetite, crocidolite and hematite were active and siderite was very active. These reactions could play a role in the mechanisms of toxic injury caused by some solid iron compounds.
Effect of pressure on the oxidative coupling of methane in the absence of catalyst

The oxidative coupling of methane was carried out in the absence of catalyst in a continuous flow setup at total pressures up to 1,000 kPa, temperatures from 950 to 1,230 K, and inlet molar ratios of CH[sub 4]/O[sub 2] down to 2.5. At constant temperature and residence time, the conversions of methane and oxygen increase drastically with increasing pressure. At oxygen conversions higher than 80%, product selectivities are comparable at different pressures. The space-time yield of the C[sub 2]products reaches a level comparable to that required for industrial operations from 400 kPa on. A radical-reaction network consisting of 38 elementary reactions allows to describe the experimental data. To describe adequately the effect of total pressure, the pressure fall-off behavior of the rate coefficients for the unimolecular reactions in the network has to be taken into account explicitly. General features of the reaction mechanism do not depend on the total pressure. Methyl and hydrogen peroxy radicals are the most abundant radicals. The total pressure increase results in a drastic increase of the concentrations of the chain carriers, particularly the hydrogen peroxy radical. Higher pressures favor the oxidative route from ethane to ethylene compared to the pyrolytic route. Increasing the total pressuremore » leads to an increase of the primary and a decease of the consecutive CO formation relative to the coupling. The balance between these nonselective routes determines the effect of the total pressure on the integral selectivity to C[sub 2] products at different conversions. The major contribution to the integral CO selectivity comes from the oxidation of methyl radicals. « less
Thermoelectric energy from flexible P3HT films doped with a ferric salt of triflimide anions

Due to their low thermal conductivity, non-toxicity and low cost, conductive polymer materials are potential candidates for thermoelectric applications. Here, a detailed investigation into the thermoelectric properties of P3HT films is reported. A thermoelectric power factor over 20 μW m−1 K−2 at room temperature was obtained by employing a ferric salt of triflimide (TFSI−) anions as a dopant. Flexible films of P3HT-TFSI were characterized by X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD) and scanning electron microscopy (SEM), along with temperature-variant electrical measurements. Given the promising results obtained from ordinary P3HT films by a simple doping treatment, this work suggests the significance of the appropriate choice of dopants and/or counterions, as well as the polymers themselves.
Elastic properties of zinc: A compilation and a review

The elastic constants of zinc are compiled and reviewed; one hundred references are cited. The included elastic constants are: Young’s modulus, shear modulus, bulk modulus, compressibility, Poisson’s ratio, second‐order single‐crystal elastic stiffness and compliances, and third‐order, elastic stiffness. Temperature and elastic‐anisotropy effects are also reviewed. Other topics are: sound velocities, elastic Debye temperature, Cauchy relationships, elastic stability, pressure effects, and theoretical studies. New polycrystalline data are computed from single‐crystal data by tensor‐averaging methods.
Characterization and transformation of dissolved organic matter in a full-scale wastewater treatment plant in Harbin, China

Abstract The removal and transformation of dissolved organic matter (DOM) in different units of a full-scale A/O wastewater treatment plant (Harbin, China) were investigated both in summer and winter. DOM in the raw wastewater (RW) and the effluents of the grit chamber, primary sedimentation tank, anaerobic tank, oxidation tank (OT), and secondary sedimentation tank (SST) were fractionated and characterized. Hydrophilic fraction (HPI) was the predominant component in RW, followed by acidic fractions. The results also showed that 89.7% of the bulk dissolved organic carbon (DOC), 52.5% of UV-254, as well as 86.4% of trihalomethanes (THMs) precursors were removed by wastewater treatment plants in summer, while the removal efficiency of DOC and THMs formation potential decreased in winter. A/O facilities were more effective in removing HPI related organics than other units, particularly in summer. Structural changes of organic fractions in different units were also characterized via spectrum analysis. All of .
Aggressive Jungen und gewalthaltige Computerspiele: Eine Längsschnittstudie zu der Frage, wer wen beeinflusst

0\. Titelblatt 1\. Einleitung 1 2\. Aggressives Verhalten bei Grundschulern 6 3\. Beschaftigung mit gewalthaltigen Computerspielen 24 4\. Gewalt in Computerspielen und aggressives Verhalten 38 5\. Fragestellungen und Erwartungen 75 6\. Methode 80 7\. Ergebnisse der ersten Erhebung 102 8\. Ergebnisse der zweiten Erhebung 117 9\. Langsschnittliche Ergebnisse zur Wirkrichtung 136 10\. Diskussion 153 11\. Literaturverzeichnis 162 12\. Anhang 177