Miracle-dz/UniFAR-FTUs huggingface dataset:
Copper nanoparticles modified graphitic carbon nitride nanosheets as a peroxidase mimetic for glucose detection

In this study, copper nanoparticles modified graphitic carbon nitride nanosheets (Cu NPs/g-C3N4) as a novel peroxidase mimetic were successfully prepared by the calcination of dicyandiamide–Cu2+ complex with the assistance of humic acid. The morphology and structure of the product were characterized by X-ray powder diffractometry (XRD), Fourier transform infrared spectroscopy (FTIR) and transmission electron microscopy (TEM). The prepared Cu NPs/g-C3N4 was found to have highly peroxidase-like activity, which can rapidly catalyze the oxidation of peroxidase substance 3,3′,5,5′-tetramethylbenzidine (TMB) to produce a blue color in the presence of H2O2. Accordingly, a simple, selective and fast colorimetric method was developed for H2O2 and glucose detection. The prepared Cu NPs/g-C3N4 exhibited low detection limits of 3.2 × 10−8 M and 3.7 × 10−7 M for H2O2 and glucose, respectively, due to the excellent peroxidase-like activity of Cu NPs/g-C3N4 originating from the synergistic effect of Cu NPs and g-C3N4. In this work, we utilized the easily forming complex ability of dicyandiamide and Cu2+ ions to form a homogeneous precursor solution, and then obtained the CuNPs/g-C3N4 product; such a method may have wide applications in novel composite nanomaterial preparation. The product may have promising applications in medical diagnostics and biotechnology fields.
Implementasi Nilai-nilai Pancasila sebagai Pendukung Tumbuh Kembang Wawasan Kebangsaan pada Mata Pelajaran Ppkn di SMP Negeri 7 Palembang

This study aimed at describing the implementation of Pancasila as the values which supported the improvement and development of national insight on PPKn subject in SMP Negeri 7 of Palembang. This research was a descriptive research using qualitative approach. It was conducted in SMP Negeri 7 Palembang involving the teachers and the students as the object of the research. The data were collected through observation, interviews, and documentation. The validity of the data was measured through triangulation technique. The results showed that students in SMP Negeri 7 began to show the attitude of nationalism, such as: respect for the dignity of human beings as the creation of the Almighty God by reading the holy verses of the Qur'an and Dhuha prayer at zero hour (06:40) ; helped a needy friend, dared to respond to what the teacher had taught. From this study, it is clear that Pancasila is really the foundation and the principal of life of the Indonesian nation. Through Pancasila and PPKn subject, the education in Indonesia is hoped to be able to create the generation whose attitudes and actions really reflect the identity of the Indonesian nation which is based on the values of Pancasila. It is also taught abou how to defend the country. If one region in Indonesia is threatened then the threat applies to all Indonesian citizens.
OMISSÃO DE MACRONUTRIENTES NO CRESCIMENTO E NO ESTADO NUTRICIONAL DE CAPIM-ELEFANTE (CV. MOTT) CULTIVADO EM SOLUÇÃO NUTRITIVA

The objective of this work was to evaluate the effect of omission of macronutrients in the growth and the nutritional state of elephant-grass plants ( Pennisetum purpureum Shum cv. Mott). The experiment was developed in the FCAV/UNESP, in Jaboticabal-SP,Brazil, using nutrient solution. The experimental design was completely randomized blocks, with seven treatments (the complete solution proposed by Hoagland & Arnon (1950) and the individual omission of N, P, K, Ca, Mg and S, in these solution), in three repetitions. Pre-germinated plants were placed in pot (5 dm 3 ), containing the nutrient solution, which was aerated constantly during the experimental period and the respective treatments, with three replications each. Weekly, the height of the plants, the leaf number, apex diameter and number of tillers were evaluated as well as plant nutritional state. The omission of N, P, K, Ca, Mg and S limited the production of dry weight of shoot the elephant grass, compared to the full treatment. The deficiency of a macronutrient, in addition to promoting reduction of its content in the shoot, resulted in reducing the accumulation of most macronutrients, with resultant morphological changes, translated as characteristic symptoms of deficiency.
XAFS Study of As in K‐T Boundary Clays

Local structure around arsenic atoms in K‐T boundary clays was studied by As K‐edge XAFS spectroscopy. The threshold E0 energy of As and the characterization of the white peak of XANES spectra agree well with the values of As(+5) minerals like Zn2(AsO4)2(OH)22H2O and CaCu(AsO4)(OH) according to the comparison with several types of arsenic minerals. This indicates that arsenic is in a high oxidation state As(+5) and occupies the AsO4 tetrahedral site of a mineral in K‐T boundary clays.
Anterior Talofibular Ligament Ruptures, Part 1 Biomechanical Comparison of Augmented Broström Repair Techniques With the Intact Anterior Talofibular Ligament

Results: The mean ultimate load to failure of suture tape augmentation (315.5 6 66.8 N) was significantly higher than that of the intact ATFL (154.0 6 63.7 N) (P = .017). The mean ultimate load of the Broström repair with suture tape augmentation (250.8 6 122.7 N) was not significantly different from that of the intact ATFL. The mean stiffness of augmentation alone (31.4 6 9.9 N/mm) was significantly higher than that of the intact ATFL (14.5 6 4.4 N/mm) (P = .008). The mean stiffness of the Broström repair with augmentation (21.1 6 9.1 N/mm) was not significantly different from that of the intact ATFL.
Study on the Reaction Mechanism and Kinetics of the Thermal Decomposition of Nitroethane

Despite many theoretical and experimental advances in understanding the macroscopic properties of energetic materials, much work remains to be done to understand their microscale mechanism. In this work, the reaction mechanism and kinetics of thermal decomposition of nitroethane were studied by density functional theory (DFT) calculations, automatic pressure tracking adiabatic calorimeter (APTAC) measurements, and gas chromatography (GC) analysis. The APTAC results were used to determine Arrhenius parameters of A = 1013.5±0.2 and Ea = 46.2 ± 0.5 kcal/mol. The decomposition process includes three initial steps: concerted molecular elimination of HONO, nitro−nitrite isomerization, and rupture of C−NO2. Followed these initial reactions, a detailed mechanism that consists of 23 elementary steps was proposed. Numerical simulations of the proposed mechanism reproduce reasonably well the distributions of major products over the temperature range. It was found that the relative concentrations of NO and C2H4 depen.
Pengaruh Moral Wajib Pajak, Sikap Wajib Pajak dan Norma Subjektif terhadap Kepatuhan Pajak melalui Pemahaman Akuntansi

prediktor kepatuhan pajak sampai saat ini menarik perhatian para peneliti di setiap negara. Namun penelitian di Kota Medan menguatkan prediksi tingkat kepatuhan pajak masih rendah. Meskipun tingkat pertumbuhan Usaha Mikro Kecil Menengah (UMKM) di Kota Medan semakin meningkat dari tahun ketahun, namun pertumbuhan tersebut tidak menunjukkan kenaikan tingkat kepatuhan pajak di Kota Medan. Tujuan dari penelitian ini adalah untuk memprediksi variabel moral wajib pajak, sikap wajib pajak, norma subjektif pada kepatuhan pajak melalui pemahaman akuntansi. Responden yang digunakan dalam penelitian ini adalah UMKM di Kota Medan. Penelitian survei menjadi desain penelitian ini dengan menggunakan kuesioner sebagai instrumen. Dua ratus UMKM berpartisipasi dalam penelitian ini. Data dianalisis menggunakan Partial Least Square (PLS) dengan menggunakan SmartPLS. Hasil penelitian menemukan bahwa terdapat pengaruh postif tetapi tidak signifikan pada Moral, Sikap, Norma Subjektif terhadap Kepatuhan Pajak. Terdapat Pengaruh postif dan signifikan pada Moral terhadap Pemahaman Akuntansi. Terdapat pengaruh negatif dan tidak signifikan pada Sikap terhadap Pemahaman Akuntansi. Terdapat pengaruh positif dan tidak signifikan pada Norma Subjektif terhadap Pemahaman Akuntansi. Pengaruh total effect dan indirect effect diketahui bahwa secara statistik berpengaruh positif dan signifikan Moral Wajib Pajak dan Norma Subjektif terhadap Kepatuhan Pajak melalui Pemahamahan Akuntansi. Pengaruh total effect dan indirect effect diketahui bahwa secara statistik berpengaruh negatif dan signifikan Sikap Wajib Pajak terhadap Kepatuhan Pajak melalui Pemahaman Akuntansi.
Transparent Nd and (Nd, Yb)-doped Sc2O3 ceramics as potential new laser materials

Highly transparent Sc2O3 ceramics with uniform doping up to 0.5at. % Nd and with (Nd, Yb) codoping are reported. The spectroscopic and emission decay properties of Nd:Sc2O3 ceramics are similar to those of single crystals. Highly efficient Nd-to-Yb energy transfer is observed in the codoped ceramics. It is inferred that these materials have potential for construction of Nd or Nd-sensitised-Yb lasers.
Calcium, Magnesium, Iron, Zinc, Cadmium, Lead, Copper and Chromium Determinations in Brown Meagre (Sciaena Umbra) Bone Stone by Flame and Electrothermal Atomic Absorption Spectrometry

The concentrations of Ca, Mg, Fe, Zn, Cd, Pb, Cu and Cr in head bone stones of brown meager (Sciaena umbra) fishes and Bone ash 1400 standard reference material were determined by flame and electrothermal atomic absorption spectrometry. Flame atomic absorption spectrometer was used for the determination of Ca, Mg, Fe and Zn in samples by using lanthanum + potassium mixture. Electrothermal atomic absorption spectrometer was used for the determination of Cd, Pb, Cu and Cr in samples by using lanthanum + palladium + ammonium dihydrogen phosphate as chemical modifier mixture. Limits of detection obtained are 2.5, 0.2, 11, 18, 1.1, 0.12, 1.21, 1.09, 0.12 9 g L -1 for Ca, Mg, Fe, Zn, Cd, Cu, Pb and Cr, respectively. Recovery tests for analytes in Bone ash 1400 and bone stone sample solutions were studied. Percent recoveries of analytes obtained are in the range of 96 – 102 %. Key Words:Trace metals, Bone Stones of Brown Meager Fish, FAAS and ETAAS, La+Pd+NH 4 H 2 PO 4 .
Principles of Plasma Spectroscopy

The diagnosis of plasmas using spectroscopic observations has its origins in various older disciplines, including astronomy and discharge physics. As laboratory plasma physics evolved from low-density, low-temperature discharges to higher energy density plasmas, the need for non-interfering diagnostics arose and spectroscopy was applied to determine the physical state and chemical abundance of the plasmas studied.
Characterization of Human Skin Emanations by Solid Phase Microextraction (SPME) Extraction of Volatiles and Subsequent Analysis by Gas Chromatography-Mass Spectrometry (GC-MS)

Abstract : An experimental study was performed to develop and validate a collection and analysis protocol for human skin emanations. The protocol developed included the rubbing of glass beads on the palms and backs of hands for 20 minutes. The volatile headspace above samples were extracted by a solid-phase microextraction fiber which incorporated a composite coating of liquid polymer matrix and solid porous particles. This protocol provided robust and convenient signatures of human skin emanations and was applied to two experiments for validation. In one experiment, a set of twins donated samples and results suggested qualitative differences between samples of twins. The second experiment involved collections from four unrelated individuals over a period of one month. Multivariate analysis was applied to this data set and indicated a stable signature that can be ascribed to the individual, confirming that the protocol developed here can be extended to larger sample sets of MHC typed individuals.
Benzopyrones. Part II. 7-hydroxy-4-oxochromen-2-carboxylic acid and some of its derivatives

A simplified synthesis of 7-hydroxy-4-oxochromen-2-carboxylic acid (1) from 2,4-dihydroxyacetophenone is described. Bromination of ethyl 7-hydroxy-4-oxochromen-2-carboxylate (3) gave a mixture of 8-bromo-, 6,8-dibromo-, and 3,6,8-tribromo-derivatives; similar treatment of the acid (1) yielded the 8-bromo-acid only. Nitration of the acid (1) or ester (3) gave the 8-nitro- or the 6,8-dinitro-derivative. The n.m. r. and i.r. spectra of these and related chromones are discussed.
Structure of the Aqueous Pertechnetate Ion by Raman and Infrared Spectroscopy. Raman and Infrared Spectra of Crystalline KTcO4, KReO4, Na2MoO4, Na2WO4, Na2MoO4·2H2O, and Na2WO4·2H2O

The Raman crystal spectra of KTcO4, KReO4, Na2MoO4, Na2WO4, Na2MoO4·2H2O, and Na2WO4·2H2O, and the Raman aqueous spectra of TcO4— and MoO42— have been observed. Infrared spectra of Nujol mulls of all the salts were measured in the rock salt region. Infrared spectra in the CsBr region were also obtained for Na2MoO4 and Na2WO4. For the tetrahedral ions (Td symmetry) of the latter two salts v2(e)>v4(f2), which represents an inversion of the usual order. Examination of all the spectra leads to the conclusion that the Raman spectrum of aqueous pertechnetate ion, which shows only two lines, represents the spectrum of tetrahedral TcO4— ion perturbed by the close association of water molecules. The appearance of two instead of four Raman lines in the spectrum is shown to result from the accidental degeneracy of v1(a1) and v3(f2) vibrations. The v2(e) line is not detected probably because of its low intensity and broadness. The observation of three rather than the expected four Raman lines for molybdate ion is sim.
The thermoelastic properties of post-perovskite analogue phases

Post-perovskite MgSiO3 is a major component of the D'' zone at the base of the lower mantle, so knowledge of its physical properties is essential to understanding mantle dynamics. Unfortunately, MgSiO3 post-perovskite is stable only at Mbar pressures. This difficulty can be addressed by combining computer simulations with experiments on analogue post-perovskite ABX3 phases, stable at ambient pressure and temperature. In this project, the properties of MgSiO3 and other oxide and fluoride post-perovskites were simulated using both athermal and molecular dynamics ab initio methods. Correspondence with experiment was generally good, although better in compression than when heated. Because few ABO3 oxides with this structure are known, an empirical approach was developed to predict whether post-perovskite phases would occur for given A, B and X elements, and to estimate the stabilisation pressures required. Only CaIrO3 forms at ambient pressure; single crystals were prepared for structural measurements, but the extremely high absorption made X-ray diffraction unreliable. Powdered CaPtO3 was synthesised at high-pressure and its thermoelastic properties and structure determined at high-pressure and from low to high-temperature by neutron powder diffraction; its isothermal equation of state was determined by Xray powder diffraction. CaPtO3 (and CaIrO3 as measured previously) have the same axial compression sequence (k_^c > k_^a > k_^b) as MgSiO3, but all show different axial expansion at high-temperature. Across D'' significant changes in the physical properties of MgSiO3 post-perovskite are likely to arise from changes in temperature as well as from changes in pressure; the differences in axial expansion therefore suggest that CaPtO3 and CaIrO3 may not be suitable analogues. Computer simulations suggest that ABF3 compounds may provide better analogues for MgSiO3 postperovskite. A new post-perovskite NaNiF3 has been synthesised at 15 GPa and its unit cell parameters determined; further experiments on these fluorides are the subject of ongoing work.
Synthesis and Evolution of the Crystalline Phases in Ca1−xSrxAl2O4

Abstract The preparation and structural properties of the series of oxides Ca 1− x Sr x AlO 4 are described. Using a combination of synchrotron and neutron powder diffraction methods, it is found that the single-phase solid solutions exist only over a very limited range, x and x>0.85. Reitveld refinement analysis demonstrated that at intermediate doping levels a complex series of phases are present. The solubility limit of Sr in CaAl 2 O 4 is rationalized in light of the structural studies.
The effect of Epac activation on human coronary artery endothelial cells

The endothelial barrier is essential for vascular function, and its disruption may play a major role in the development of cardiovascular diseases. An increase in cAMP levels tightens the endothelial barrier by enhancing junction formation, and this is, in part, mediated by activation of exchange protein directly activated by cAMP (Epac). Vascular endothelial cells express vascular endothelial cadherin (VE-cadherin), and connexins 37, 40 and 43. Re-distribution of VE-cadherin in human coronary artery endothelial cells (HCAECs), induced by EGTA treatment or blocking VE-cadherin-VE-cadherin interactions through pre-treatment with anti-VE-cadherin primary antibody, triggered a subsequent re-distribution of Cx37 that was reversible. Epac activation with the Epac-selective agonist 8-pCPT induced a re-distribution of VE-cadherin and connexin 37 to sites of cell-cell contact in HCAECs, increasing the co-localisation of these two proteins, as detected by immunocytochemistry. This increased co-localisation was completely blocked by Epac1 siRNA. To test whether the re-distribution of Cx37 induced by Epac activation resulted in the formation of new functional gap junction channels, Lucifer yellow dye transfer was examined in HCAECs under varying conditions. Epac activation in HCAECs enhanced gap junction intercellular communication (GJIC), and this increase was completely blocked by the Epac inhibitor HJC0197. 8-pCPT addition was also shown to induce a transient increase in the intracellular calcium concentration in HCAECs, as detected with the calcium indicator Fluo-4. This calcium transient was independent of protein kinase A (PKA), and occurred in the absence of extracellular calcium, but was inhibited by the presence of the endoplasmic reticulum calcium ATPase inhibitor cyclopiazonic acid (CPA), indicating that Epac primarily mediated the increase, and that intracellular stores were the predominant source of calcium. Furthermore, the calcium transient induced by 8-pCPT was considerably reduced by the Epac inhibitor ESI-09 and completely inhibited by the Epac inhibitor HJC0197. Together, these data suggest that Epac strengthens the endothelial barrier through re-distribution of VE-cadherin and Cx37. In addition, GJIC is enhanced by Epac activation and there is a rise in intracellular calcium, a second messenger that can be transferred to adjacent cells through GJIC. It may be possible, therefore, that these effects of Epac promote endothelial cell- smooth muscle cell communication and therefore Epac could play a role in the regulation of vascular tone.
Use of a handheld Raman spectrometer for fast screening of microbial pigments in cultures of halophilic microorganisms and in microbial communities in hypersaline environments in nature

A compact handheld Raman spectrometer equipped with a 532 nm excitation laser was used to detect pigments as possible biomarkers in autotrophic (cyanobacteria and purple sulfur bacteria) and heterotrophic halophilic microorganisms (Archaea of the family Halobacteriaceae, Salinibacter). Common as well as less common carotenoids, including α-bacterioruberin, salinixanthin, and spirilloxanthin derivatives were detected in cell pellets of model organisms belonging to the genera Haloferax, Haloarcula, Halobacterium (Archaea), Salinibacter (Bacteroidetes), and Ectothiorhodospira (Gammaproteobacteria). Direct measurements on such cultures provide fast and reliable identification of pigments. Bacterioruberin was detected as the dominant carotenoid in pellets of cells collected from the saltern crystallizer ponds in Eilat, Israel. Raman analysis of the colored layered microbial communities in a benthic gypsum crust in the saltern evaporation ponds showed signals consistent with the presence of myxoxanthophyll and echinenone carotenoids in the upper orange and dark-green cyanobacterial layers. Chlorophyll a and phycocyanin expected in the green layer were not detected using the green excitation. Spirilloxanthin dominates the red layer below, inhabited mainly by purple sulfur bacteria. To our best knowledge, this is the first attempt to detect and identify pigments in natural microbial communities consisting of different types of halophilic microorganisms by direct Raman spectrometric measurements using light compact handheld devices. Copyright © 2013 John Wiley & Sons, Ltd.
Preservation Methods Impacted Phenolic, Flavonoid and Carotenoid Contents and Antioxidant Activities of Carrots (Daucus carota L.)

Minimal processing methods could result in a very short product shelf life due to microbial and quality deteriorations. This study was undertaken to investigate the influence of blanching, freezing, dehydration and canning on the phenolic, flavonoid and carotenoid contents and antioxidant activities of carrots during storage. Carrot blanching resulted in a significant improvement in the phenolic, flavonoid and carotenoid contents and a reduction in DPPH (1,1-diphenyl-2-picrylhydazyl) inhibition activity compared with fresh carrot. Flavonoid and carotenoid contents of blanched carrot, e.g., were significantly (P < 0.05) increased from 0.029 in fresh samples to 0.038 (μg/g) and from 148.2 to 275.6 (μg/g), respectively. Phenolic, flavonoid and carotenoid content retention decreased from 70.8, 51.7 and 47.9% during the first month of storage to 57.3, 41.4 and 11.8% during the third month of storage. Carrot blanching resulted in a significant increase in the retention of phenolic, flavonoid and carotenoid contents from 100% to 113.5, 131.0 and 186.0%, respectively. Practical Applications Minimally processed carrots have gained interests for their nutritional value and sensory attributes. However, due to the limited shelf life of these processed products, various heat treatments are in practice. Contradictory information on the effect of various processing on the phenolic, flavonoid and carotenoid contents and antioxidant activities of carrots during storage are currently available in the literature. With the increasing consumer demand for minimal processed food, results would provide essential information for consumer selection of processed carrots.