Miracle-dz/UniFAR-FTUs huggingface dataset:
PENGARUH STATUS KEBERSIHAN GIGI DAN MULUT (OHI-S) TERHADAP STATUS GINGIVA (GI) PADA SISWA SMP PSM KOTA BUKITTINGGI

Kebersihan gigi dan mulut merupakan salah satu masalah yang sering dialami pertumbuhan dan perkembangan remaja.Kebersihan gigi dan mulut yang tidak baik dapat menyebabkan terjadinya inflamasi gingiva.Penelitian inibertujuan untuk mengetahui pengaruh status kebersihan gigi dan mulut (OHI-S) terhadap status gingiva (GI) pada siswa SMP PSM Kota Bukittinggi.Penelitian ini menggunakan metode analitik dengan pendekatan cross sectional. Subyek penelitian 66 siswa SMP PSM kota Bukittinggi yang diambil dengan teknik purposive sampling. Data dikumpulkan dengan melakukan pemeriksaan indeks kebersihan gigi dan mulut (OHI-S) dan indeks gingiva (GI), analisis data menggunakan uji Kai Kuadrat (chi square test). Hasil penelitian menunjukkan adanya pengaruh yang signifikan antara status kebersihan gigi dan mulut (OHI-S) terhadap status gingiva (GI). Hasil uji “chi square” diperoleh ρ-value<α-value(0,000 < 0,05). Status kebersihan gigi dan mulut subyek sebagian besar memiliki kriteria sedang dan Status gingiva sebagian besar memiliki kriteria peradangan sedang. Disarankan kepada responden agar melakukan perawatan gigi dan mulut sederhana seperti menyikat gigi 2x sehari dan berkumur-kumur setelah makan untuk mengontrol plak dan mengurangi resiko keparahan peradangan gingiva. Kata Kunci: OHI-S dan GI
Aspects on interaction between multistage stabilization of polyacrylonitrile precursor and mechanical properties of carbon fibers

The progression of polyacrylonitrile (PAN) fibers on multistage stabilization stage has been monitored by following the variations in density, elemental composition, morphological aspect, and mechanical properties. The effects of various processing conditions during the multistage stabilization on the mechanical properties of final carbon fibers were evaluated in detail. To achieve an optimal extent of stabilization of PAN fibers is critical as the final mechanical properties of carbon fibers are concerned. This aim can be realized by adjusting and matching the temperatures in each step and the processing rates during multistage stabilization. Imposing stretching on multistage stabilization is beneficial to mechanical properties of carbon fibers. © 1995 John Wiley & Sons, Inc.
Effects of Heat and Water Stress on Malt Quality and Grain Parameters of Schooner Barley Grown in Cabinets

Abstract In growth-cabinet experiments heat and water stresses were separately applied to populations of barley plants, cv. Schooner, 17 or 27 days post-anthesis (DPA), after which the mature grain was micromalted and a number of malt quality parameters measured. Water stress at 17 DPA (mid grain-fill) led to decreased grain (1 → 3),(1 → 4)-β-glucan and increased malt extract, (1 → 3),(1 → 4)-β-glucanase, α-amylase and β-amylase, while at 27 DPA (late grain-fill) only extract was increased. Heat stress with maintenance of soil moisture level had no effect on these parameters. Both types of stress reduced yield and grain size. Neither stressed nor unstressed grain showed any dormancy. These findings indicate that the malting performance of Schooner barley is more related to water stress than heat stress. They also suggest that a limited episode of water stress during grain-fill may be beneficial for malting quality.
LATENT EFFECTS OF SOME PESTICIDES AND PLANT GROWTH REGULATOR ON COWPEA APHID, Aphis craccivora KOCH (HOMOPTERA: APHIDIDAE)

The latent toxicity of chemical insecticide; malathion, bioinsecticide; Beauveria bassiana and a plant growth regulator (PGR) Extratone were studied on some biological parameters of adult Aphis craccivora under laboratory conditions. The obtained results revealed that the two sub-lethal concentration 0.01 and 0.1 ppm sub LC50 (0.73 ppm) of malathion decreased each of the mean longevity of adult (one day old), mean offspring in addition to pre-parturition, parturition and post-parturition periods in comparison to the control. Eventually, both concentrations reduced the mean numbers of offspring of adult per day. B. bassiana at concentrations (200ppm) at (100ppm) decreased each of the mean longevity of adult, number of offspring, preparturition and parturition but increased post-parturition periods in comparison to the control. Both concentrations of B. bassiana treatment reduced the mean number of offspring of A. craccivora (one day old) during longevity per day. Extratone at recommended concentration decreased the duration of A. craccivora, increased the pre-parturition period and decreased the parturition period, Post-parturition period, the mean longevity of A. craccivora and the mean number of offspring of each A. craccivora adult female.
Mutagenicity and Chemical Analysis of Fumes from Cooking Meat

Fumes generated during the high-temperature frying of beef were collected using a sampling system consisting of condenser, filter, and adsorbent tubes containing polyurethane foam (PUF) and XAD-4 resin. Condenser, filter, and cooked beef samples were analyzed for heterocyclic amines (HCAs) by HPLC. The PUF and XAD-4 samples were fractionated using supercritical fluid extraction (SFE) and analyzed by GC/MSD. In a modified Ames/Salmonella mutagenicity test (TA98 with S9), the mutagenic activity was 30 700 revertants/g in the cooked beef, 10 400 revertants/g in the fume condenser, and 270 revertants/g in the sampling filters. HCAs were found in both the fume condenser (total of 6 ng/g of cooked meat) and the meat (total of 109 ng/g of cooked meat). GC/MSD analysis of the compounds collected on PUF and XAD-4 revealed a variety of aldehydes, ketones, and phenols. Occupational exposure to carcinogens in the fumes may pose a human health risk to food preparers and warrants further investigation.
Density Functional Model Study of Uranyl Adsorption on the Solvated (001) Surface of Kaolinite

We studied the adsorption of uranyl on bare and solvated models of the octahedral (001) surface of kaolinite using first-principles density functional calculations. Inner-sphere bidentate complexes adsorbed at partially deprotonated short-bridge sites AlOO(H) and long-bridge sites AlO−AlO(H) were modeled as the most probable adsorption complexes. The uranyl complex at the doubly deprotonated AlO−AlO long-bridge site exhibits a third contact to the surface, not present in the complex at the corresponding short-bridge site. Adsorption at short-bridge sites is energetically favored compared to complexes at long-bridge sites. We were unable to determine stable adsorption complexes of uranyl at singly deprotonated AlO−AlOH long-bridge sites. Surface solvation, approximated via an adsorbed monolayer of water molecules, hardly affects the adsorption complexes of uranyl. Contacts U−Oeq in the equatorial plane shorten by 2 pm, U−Al distances elongate by up to 4 pm. In contrast to the bare surface, adsorption compl.
Click Chemistry on Polymer Support: Synthesis of 1-Vinyl- and 1-Allyl-1,2,3-triazoles via Selenium Linker

Abstract Polystyrene-supported 2-azidoethyl phenyl selenide and 3-azidopropyl phenyl selenide reagents have been developed and applied to the traceless solid-phase organic synthesis of 1-vinyl- and 1-allyl-1,2,3-triazoles by CuI-mediated azide–alkyne cycloadditions and subsequent cleavage from the polymer support through oxidation–elimination reaction with 30% hydrogen peroxide. The advantages of this method include straightforward operation, good yield and purity of the products, and good stability and lack of odor for the reagents. GRAPHICAL ABSTRACT
AN INVESTIGATION ON THE OPTICAL PROPERTIES OF CARBON BLACK, FULLERITE, AND OTHER CARBONACEOUS MATERIALS IN RELATION TO THE SPECTRUM OF INTERSTELLAR EXTINCTION OF LIGHT

ABSTRACT In this work, the optical properties in the UV-VIS of three carbon blacks having specific surface area from 145 to 7 m2/g and produced with furnace or thermal processes have been studied. The results have been compared to the optical properties (in the same spectral range) of C60 fullerene photopolymer, to fullerite i.e., the carbon soot containing fullerenes and to a sample of carbonaceous matter containing carbyne. The scope of the work was to verify if any of the carbonaceous matter studied was able to match the interstellar extinction spectrum which shows a “bump” at 217.5 nm and which was originally attributed to interstellar graphitic particles. None of the materials studied has shown a peak at 217.5 nm. All the carbonaceous materials studied show maxima of absorption from 252 to 267 nm with the exclusion of C60 photopolymer which has a completely peculiar and different spectrum from all other materials with three maxima at 271, 389 and 510 nm. All the carbon materials studied do not match the 217 nm peak, hence, cannot be considered the carrier of the interstellar “bump” but may be present in some circumstellar shells of late type stars, where the peaks at 240–250 nm have been recorded and attributed to a more ordered and partially graphitized carbonaceous matter. In the discussion, the matrix effect, the particle size, and the clumping of the material studied have been considered as cause of the shift of the peak to longer wavelength. The carbon black samples have also been extracted with pentane or ethanol and the polycyclic aromatic hydrocarbons (PAH) identified have been discussed in the frame of recent works and in relation to the role that they play in the interstellar medium as potential carriers of the diffuse interstellar bands (DIBS).
Propriedades biológicas em agregados de um Latossolo Vermelho-Escuro sob plantio convencional e direto no Cerrado

The distributions of microbial biomass carbon (MBC), enzymes activities and readily mineralizable carbon were evaluated across soil aggregates recovered from a Dark-Red Clayey Oxisol in areas under native Cerrado vegetation and where no-tillage (NT) and conventional tillage (CT) management systems have been established for 21 years. Soil samples were collected at a 0 to 5 cm depth and aggregates were prepared using a wet sieving procedure. The size classes 8.0 to 2.0 mm, 0.5 to 0.25 mm and 0.25 to 0.106 mm and samples denominated sum of aggregates (SA) were selected for biological determinations. In relation to the native Cerrado the agricultural systems caused the disruption of macroaggregates and losses of MBC. As compared to the CT, the reduced soil tillage, the accumulation of organic matter and the localized application of fertilizers in the NT system favored higher levels of acid phosphatase and arylsulfatase in its aggregates and SA samples. NT microaggregates and SA samples presented higher levels of MBC as compared do the CT. The highest activities of b-glucosidase were also found in the NT macro and microaggregates. The NT and CT management systems influenced the distribution profile, in soil aggregates, of the biological properties evaluated. Acid phosphatase, b-glucosidase and arylsulfatase activities were higher in the NT macroaggregates, in spite of the evenly distribution of MBC in the three aggregate size classes evaluated. In the CT, only b-glucosidase presented an uneven distribution in macro and microaggregates.
Mass Transfer Studies in Stirred AirLift Reactor

Abstract In the present work, water and three phase compositions of Solka-Floc, a cellulose fiber for simulating the biomass in bacteria, yeast, and fungal fermentation were studied in a 1.4 m3 stirred airlift reactor. The fractional dispersed phase holdup and the overall volumetric mass transfer coefficients were measured. The dispersed phase riser gas holdup and overall volumetric mass transfer coefficients both increased with increasing riser superficial dispersed phase velocity (0.02–0.1 ms−1) and agitator speed in the range of 0–5 rs−1. An increase in the Solka-Floc concentration (1–3% w/v) was found to reduce ϵGR and K L a L . Empirical correlations have been developed for fractional dispersed phase gas holdup and overall volumetric mass transfer coefficients.
Thermoanalytical Evidence of Metastable Molecular Defects in Form I of Benzamide

Friedrich Wohler and Justus von Liebig discovered the first case of molecular polymorphism when crystallizing benzamide in 1832. (1) Thus far only microcrystalline mixtures of metastable phases with the thermodynamically stable form I were available. Optimizing the conditions for crystal growth now gave access to single crystals of the metastable form III which allowed for a detailed comparison of form I and form III by Raman and IR spectroscopy and thermoanalysis. Surprisingly, in the course of detailed differential scanning calorimetry (DSC) measurements for form I an endothermic peak prior to melting was observed. As proven by temperature dependent powder diffraction, thermal microscopy, molecular dynamic (MD) simulations, and solid-state NMR, this premelting thermosignal is not related to an enantiotropic phase transition of form I into form III with a transition temperature close to the melting point. Rather the thermosignal is related to a significant population of metastable defects in form I. While.
Facile synthesis of large-area manganese oxide nanorod arrays as a high-performance electrochemical supercapacitor

Large-area manganese oxide nanorod arrays (MONRAs) and herringbones (MOHBs) were successfully synthesized on F-doped SnO2 coated glass (FTO) substrates by a simple electrochemical method. Cyclic voltammetry (CV) and galvanostatic charge/discharge measurements demonstrated that the MONRAs and MOHBs exhibited excellent specific capacitance and good cycling stability in 0.5 M Na2SO4 aqueous solution. For example, the specific capacitance of the MONRAs achieves as high as 660.7 F g−1 at a scan rate of 10 mV s−1 and 485.2 F g−1 at a current density of 3 A g−1, respectively. Furthermore, the presented method may be extended to allow similar MONRs with a specific capacitance of 583.6 F g−1 to grow on flexible Ti foil, which may have great potential application in fabricating flexible supercapacitors.
Gold speciation and transport in geological fluids: insights from experiments and physical-chemical modelling

Abstract This contribution provides an overview of available experimental, thermodynamic, and molecular data on Au aqueous speciation, solubility, and partitioning in major types of geological fluids in the Earth's crust, from low-temperature aqueous solution to supercritical hydrothermal-magmatic fluids, vapours, and silicate melts. Critical revisions of these data allow generation of a set of thermodynamic properties of the AuOH, AuCl−2, AuHS, and Au(HS)−2 complexes dominant in aqueous hydrothermal solutions; however, other complexes involving different sulphur forms, chloride, and alkali metals may operate in high-temperature sulphur-rich fluids, vapours, and melts. The large affinity of Au for reduced sulphur is responsible for Au enrichment in S-rich vapours and sulphide melts, which are important gold sources for hydrothermal deposits. Thermodynamic, speciation, and partitioning data, and their comparison with Au and S contents in natural fluid inclusions from magmatic-hydrothermal gold deposits, provide new constraints on the major physical-chemical parameters (temperature, pressure, salinity, acidity, redox) and ubiquitous fluid components (sulphur, carbon dioxide, arsenic) affecting Au concentration, transport, precipitation, and fractionation from other metals in the crust. The availability and speciation of sulphur and their changes with the fluid and melt evolution are the key factors controlling gold behaviour in most geological situations.
Influence of Azospirillum sp. inoculation in wheat, barley and oats

O objetivo deste estudo foi avaliar a influencia da inoculacao com Azospirillum sp. RAM-7 em trigo, cevada e aveia no rendimento, densidade e nitrogenio total nos graos. Os experimentos foram conduzidos em condicoes de campo. Os tratamentos envolveram a inoculacao de bacterias, com a presenca ou nao de diferentes doses de fertilizacao nitrogenada e o controle absoluto. A inoculacao foi feita pelo metodo de contaminacao das sementes com uma suspensao de bacterias contendo 1010 UFC.mL-1. Efeitos estatisticamente significativos sobre a produtividade de graos de trigo foram obtidos no tratamento inoculado e sem a adicao de fertilizacao nitrogenada, aumentando o rendimento em 23,9% em relacao ao controle (p menor 0,05). No tratamento inoculado associado a 48 kg de N.ha-1, a produtividade foi similar a obtida no tratamento com 60 kg de N.ha-1 com ou sem inoculacao. Na cevada, o rendimento de graos do tratamento inoculado associado a 32 kg de N.ha-1 foi semelhante ao que recebeu 40 kg de N.ha-1 com ou sem inoculacao (p menor 0,05). Na aveia, os tratamentos nao diferiram de seus controles em relacao ao rendimento, densidade e nitrogenio total dos graos. Os resultados obtidos nesta pesquisa indicam a possibilidade da substituicao parcial da fertilizacao nitrogenada inorgânica pela inoculacao de Azospirillum sp. RAM-7 nas culturas de trigo, cevada e aveia.
Kinetics of esterification of palmitic acid with isopropanol using p‐toluene sulfonic acid and zinc ethanoate supported over silica gel as catalysts

Kinetic data on the esterification of palmitic acid with isopropanol were obtained using homogeneous (para-toluene sulfonic acid, p-TSA) and heterogeneous (zinc ethanoate coated on silica gel, ZnA/SG) catalysts in a batch reactor. The ZnA/SG catalyst was prepared using a sol–gel technique. The esterification reaction was studied at different reaction temperatures (373–443 K), initial reactants molar ratio (1–5), catalyst loading (1–5 gcat dm−3) and water concentration in feed (0–15 vol%). A power law rate equation was used for homogeneous kinetics analysis. The Langmuir Hinshelwood Hougen Watson (LHHW) model was used for heterogeneous kinetics. The kinetic parameters of both models were obtained using Polymath software. The reaction parameters were used to obtain simulated values of conversion for both catalytic systems. The simulated values were compared with the experimental values and were in good agreement. Copyright © 2004 Society of Chemical Industry
Application of Polythiophene–Sawdust Nano-Biocomposite for Basic Dye Removal Using a Continuous System

Abstract A novel dye adsorbent was developed by a poly (3-methyl thiophene) nano layer coated onto sawdust obtained from Narra wood. The polymer was synthesized chemically under in-situ conditions on the surface of the sawdust. Methylene blue, a typical cationic textile dye, was employed as a test probe for adsorption experiments. The experiments were conducted in both batch and fixed-bed column systems. The effects of variables such as pH, initial dye concentration, flow rate, and bed height were investigated. The Thomas dynamic model was applied to calculate the sorption capacity of adsorbents. Based on the breakthrough curves analysis, the highest column capacity of 191 mg/g was obtained. The introduced nano-biocomposite was found to be more than seven times more efficient than unmodified sawdust for methylene blue removal. The regeneration of the modified sawdust is quite possible using 0.10 M HCl in ethanol as a washing solution with high efficiency.
Energy barrier to self-exchange between PEO adsorbed on silica and in solution

This investigation sought to reveal the dynamic mechanism for self-exchange between an adsorbed homopolymer layer and chains in free solution, employing poly(ethylene oxide) (PEO) adsorbed on silica from aqueous solution as a model system. Fluorescence tracer studies of individual populations within a saturated adsorbed layer revealed no dynamic distinctions between those chains which reached the interface early or late during the initial layer preparation. This observation ruled out the explanation of trapped and mobile subpopulations for bimodally shaped self-exchange kinetic traces. Studies focusing on chains aged in unsaturated or starved layers revealed faster self-exchange rates compared with chains aged in saturated layers. Surface coverage was found to be more important than molecular weight in controlling the exchange rate. Taken together, these results ruled out the number and strength of segment−surface contacts per chains as the determining kinetic factor in exchange dynamics. Interactions bet.
Effect of nitrogen on the structural and magnetic properties of intermetallic compounds with the ThMn12 structure

The effects of nitrogen uptake on the structural and magnetic properties of RFe12−xTx alloys have been studied. Several interstitial nitrides with composition RFe12−xTxNy (R=Nd and Sm and T=Ti and V) were prepared by heat treating fine powders of RFe12−xTx alloys in N2 gas. Preliminary results show the following observations: (1) The ThMn12 structure of the original compounds is retained with the addition of nitrogen but with increased lattice constants (a and c). (2) The Curie temperature is greatly enhanced by about 150–175 K. (3) The character of magnetic anisotropy is changed from ‘‘weak uniaxial’’ type to ‘‘strong uniaxial’’ type for NdFe12−xTxNy and from ‘‘uniaxial’’ to ‘‘planar’’ for SmFe12−xTxNy.
Development and antioxidant capacity of sapota pulp Jelly (Quararibea cordata Vischer)

Sapote (Quararibea cordata Vischer), also known as a chupa-chupa, is originated from the Brazilian, Peruvian and Colombian Amazon. The pulp of the ripe fruit is edible, fibrous, of intense orange color, sweet flavor and aromatic. Since the fruit is known in the Amazon only in its domesticated state, this work becomes necessary. With the aim of meeting the demand for new products in domestic and international markets, sapota pulp jelly has been developed. The jelly was assessed for moisture, ash, lipids, proteins, carbohydrates, dietary fiber, pectin, pH, total acidity, solids soluble, sugars, organic acids, carotenoids, phenolic compounds and antioxidant capacity. The final product met the standards required by Brazilian law, and 32.68% moisture and 61.06% °Brix. Also, in accordance with the laws attributed to this product, jelly sapota pulp can be considered a food rich in fiber, as presented content above 5%. The jelly, showed content of total phenolics compounds (102 mg GAE. 100 -1) in relation to fresh fruit (21 mg GAE.100 g-1). There was the identification in the antioxidant capacity (9.05% scavering of DPPH radical), giving the final product antioxidant properties. Also were analyzed the microbiological characteristics of the product which was not observed the presence of thermotolerants coliforms, yeast and molds. The sapota can be considered effective raw materials in the preparation of jam and this had an antioxidant activity and source of fiber.
EPR and ENDOR Studies of 1 H and 14 N Hyperfine and Quadrupolar Couplings in Crystals of L-O-Serine Phosphate after X-Irradiation at 295 K

identified. Radical I, the deamination product (HOOC)C œ HCH2OPO3 - H, is shown to have undergone a major molecular reorientation upon formation. Radical II is identified to be the product (HOOC)CH(NH3 + )C œ HOPO3 - H. This species exhibits a nonplanar site for the lone electron density. This deviation from planarity is ascribed to electrostatic interaction between the lone electron orbital and lone pairs centered on the neighboring oxygen atom. Hyperfine interaction with the ‚-nitrogen of the amino group is observed. Both the 14 N hyperfine and quadrupole coupling tensors are determined and the signs of the hyperfine coupling tensor principal values are deduced from interpretation of the quadrupole tensor employing the Townes-Dailey approach. The ‚ 14 N