Miracle-dz/UniFAR-FTUs huggingface dataset:
Use of Iron (II) Salts and Complexes for the Production of Soil Amendments from Organic Solid Wastes

A method to obtain rapidly stabilized composts for crops from solid organic wastes is evaluated. Here we used a laboratory scale reaction chamber where solid waste treatment was performed under strictly controlled temperature and pressure conditions. The row organic waste was mixed with acid solutions containing iron (II) ions either in the fully hydrated form or in the form of complexes with the diethylentriaminopentaacetic acid. Data from elemental analysis distribution and GC/MS analysis of the polar and non polar dissolved organic matter, clearly showed that Fe(II) ions significantly enhance organic substrate oxidation of the initial solid waste, compared to a material obtained without the addition of the Fe(II) ions to the raw organic matrix. These results suggest that Fe(II) ions might be involved in a catalytic oxidation pathway that would be activated under the experimental conditions used. The extent of the oxidation process was evaluated by the value of the C/N ratio and, qualitatively, by the molecular composition of the dissolved organic matter. After about 6 hours of incubation, dark-brown and dry organic matrices were obtained with C/N ratio as low as 12 and a high degree of oxidative decomposition into low-molecular-weight compounds at high oxidation state.
Ablation laser pour la microélectronique plastique

La microelectronique plastique connait un developpement sans precedent dans le domaine de la recherche. Cette etude s'interesse a l'utilisation des lasers impulsionnels pour la realisation de composants organiques sur supports souples. Les deux aspects plus particulierement etudies sont d'une part la gravure de polymere pour realiser un canal entre la source et le drain, et d'autre part le developpement d'un procede de depot appele LIFT pour Laser Induced Forward Transfer. Ce dernier pourrait notamment permettre de deposer des composes organiques non solubles.
Indução de receptor B1 de cininas em vasos sanguineos de ratos hipertensos por infusão de angiotensina II: estudo molecular e funcional.

Giaquinto, L. R. R. Induction of kinin B1 receptor in blood vessels of angiotensin II-hypertensive rats: molecular and functional studies. 2010. 66 p. Masters thesis (Pharmacology) Instituto de Ciencias Biomedicas, Universidade de Sao Paulo, Sao Paulo, 2011. The aim of the present study was to evaluate whether angiotensin II (ANG II) infusion modulates kinin B1 receptor (B1R) mRNA and protein expression in aorta and mesenteric arterioles of the Wistar rats. It was also evaluated blood pressure, aorta and mesenteric arterioles reactivity to RB1 agonist, des-Arg9-bradykinin (DABK). Wistar rats10-weeks old were infused either with ANG II [(400ng/Kg/min) ,group ANG II] or ANG II (400ng/Kg/min) plus RB1 antagonist, des-Arg9-Leu8-bradykinin [(DAL 350ng/Kg/min) ,group ANG II + DAL] during 28 days throughout an osmotic minipump subcutaneously. As a control group, Wistar rats at the same age underwent to the same surgical procedure without the mini-pump implantation. The blood pressure was measured weekly, during 28 days, by indirect tail-cuff method.in conscious rats The B1R mRNA and protein expression were assessed by RT-PCR real-time and immunohistochemistry respectively. It was observed that ANG II infusion caused hypertension, increased RB1 mRNA expression in aorta and mesenteric arterioles when compared to the ones in the control group. The RB1 protein expression was detected in aorta, but not in mesenteric arterioles of ANG II rats. We also observed that DABK, B1R agonist, induced endothelium and nitric oxide-dependent relaxation in aortic rings isolated from ANG II rats, but not in mesenteric arterioles studied in vivo in situ and in vitro. The B1R antagonist did not interfere with the development of hypertension caused by ANG II. To evaluate the role of RB1 in the endothelial function of hypertensive rats, cumulative-concentration effect curves to acetylcholine (ACH), an endothelium-dependent vasodilator, were constructed in aortic rings isolated from ANG II, ANG II + DAL and control rats. It was observed that the maximum response (RMAX) to ACH was decreased in aortas from ANG II and ANG II + DAL rats when compared to control, characterizing endothelial dysfunction. Although the hypertension development and the endothelium dysfunction observed in the ANG II rats were not modified by DAL,the sensitivity to ACH and eNOS expression were increased. Our results allow us to conclude that ANG II modulates the expression of B1R in aorta of rats and also that B1R may contribute to some of the vascular effects of ANG II, such as endothelial dysfunction. However, this receptor did not participate in the development of hypertension caused by ANG II. Altogether, we may suggest that the ANG II and kinins interactions go further than the opposite effects classically described. In fact, they can act synergistically in the development of vascular changes in this model of arterial hypertension.
Kinetics and mechanism of interpolyelectrolyte exchange and addition reactions

Transfer of relatively short polycation chains (guest polyelectrolyte, GPE) from their poly-electrolyte complex (PEC) with a relatively long polyanion (host polyelectrolyte, HPE) to another polyanion of the same chemical structure and chain length but tagged with a fluorescent group has been investigated by the luminescence quenching technique. It has been shown that if only one polycation chain, on average, is transferred, the reaction follows irreversible second-order kinetics. The irreversibility of the reaction is due to additional selective nonelectrostatic interaction between the polycations and polynion chains, carrying pyrenyl groups
Uncovering Aragonite Nanoparticle Self-assembly in Nacre—A Natural Armor

Nacre (mother-of-pearl) has long been identified as the best natural armor, with superior mechanical strength and eminent toughness. How does nacre disperse 95 vol % aragonite nanoparticles in 5% biopolymer matrix without agglomeration? Can we learn from this to produce nacre-like nanocomposites with a high volume fraction of reinforcements? Here we report, for the first time, the direct observation of the aragonite nanoparticle self-assembly process and dome-shaped platelet formation in the nacre from bivalve Perna viridis.At the early stage of platelet formation, the aragonite nanoparticles were found to first self-assemble into a core–shell structure and then form a dome-shaped platelet following the predesigned pattern. The dome-shaped platelets are stacked together to form an interlocking network against sliding of the platelets, thereby contributing significantly to nacre’s strength and toughness. The findings advance our understanding of nacre’s formation mechanism, provide new design guidelines fo.
Application of different N, P, K, levels on growth and yield of green gram (Vigna radiate L.) under Jatropha (Jatropha curcas) based agroforestry system

A field experiment was conducted at the Forest Nursery, college of forestry, SHUATS, Allahabad, India during the kharif 2017-18 to evaluate the “application of different N, P, K levels on growth and yield of green gram (Vigna radiata L.) under jatropha (Jatropha curcas) based agroforestry system”. The experiment consisted of 9 treatments ie. , 3 levels of nitrogen (50%,75% and 100%), 4 levels of Phosphorous (25%, 50%, 75% and 100%) and 4 levels of potassium (25%, 50%, 75% and 100%), laid out in Randomized Block Design and replicated thrice. The study revealed that the treatment T1:100% Nitrogen + 100% Phosphorous + 100% potassium gave higher growth parameters viz., plant height (46.42), number of primary branches (12.50), number of secondary branches (9.40 ), number of trifoliate leaves plant-1(11.16) and number of root nodules plant-1 (14.46) and higher yield attributes viz., number of pods plant-1 (14.76), number of grains pod-1 (10.80), grain yield(7.48 q ha-1), stover yield (16.63 q ha-1) and consequently, harvest index (45.30).
The relationship between the mercury concentration in fish muscles and scales/fins and its significance

AbstractThe determination of mercury in fish typically involves analysis of muscles. For predicting the concentration of mercury in fish muscle on the basis of the analysis of fish scales or fins, the relationship between total mercury concentrations in fish muscles and in fish scales and fins was studied. Mercury content in fish muscles, scales and fins was determined by atomic absorption spectrometry with thermal decomposition of the sample in a flow of oxygen. A number of scale treatments were applied in order to remove impurities and to enhance the prediction quality. For scale treatment, 40 min of washing with DI water in an ultrasonic bath is recommended. A coefficient of determination r2= 0.93 for the relationship between Hg concentrations in muscles and scales was achieved for 40 fish among the different fish species tested (European bream, perch, roach) from the Hamry Reservoir, Czech Republic. With respect to fin sampling, the coefficient of determination r2 for these fish was 0.86. The analysis of fish scales and caudal fins is a useful screening tool for assessing the relative mercury contamination of monitored fish. The method of sampling scales is not suitable for fish species with small scales such as brown trout.
Thick Film ZnO Resistive Gas Sensors Analysis of Their Kinetic Behavior

Thick film polycristalline ZnO gas sensors for hydrogen partial pressure determination in hydrogen-air mixtures present at very complex kinetic behavior that demands to be thoroughly clarified in order for them to be used in practical applications. For this reason a systematic investigation has been carried out on the time and temperature dependence of the electrical conductivity of ZnO films deposited via spray pyrolysis on ceramic substrates in the temperature range 498-573 K in the presence of dispersed Pt as the catalyst
Laying the Groundwork for Investigating the Link Between Genes and Polycystic Kidney Disease

• All four strains (both the RNAi hypersensitive strains YY168 and NL2099 as well as the control strains him-5 IsD and N2) dye-fill in both the head and the tail indicating that ciliated neurons are structurally intact. • When expression of unc-13, a PKD-2 localization factor, is reduced via RNAi, the hypersensitive strains exhibit altered dye-filling compared to the N2 strain. Thus, indicating unc-13 may have a role in cilia structure in tail neurons. • The N2 and him-5 IsD strains are not equally sensitive to RNAi.
Mitigating electromagnic interactions between LabPET II detection module and MRI scanners

Inserting positron emission tomography (PET) detection modules inside an MRI bore imposes extra challenges owing to the behavior of metallic materials in a strong magnetic field. The metallic parts, even when placed outside an MRI field of view, may not only disturb MRI performance but could also increase temperature and vibrations, leading to premature failure of PET electronics. To investigate the compatibility of detection modules inside 3 T, 7 T and 9.4 T MRI bore, a theoretical study of the metalinduced artifacts originating from component materials of the electronic circuit is presented. The LabPET II detection module and a modified version of it in which the connector was replaced by a ball grid array (BGA) were studied. In addition, the effect of eddy current and the associated heat loss on the PET detection module have been examined using COMSOL Multiphysics® simulations for 10 kHz and 100 kHz gradient switching. Results show that displacement artifacts resulting from the presence of small amounts of ferromagnetic metal and the heating effects of metal due to gradient switching can be compensated by using the slightly modified LabPET II detection module. Thus, the LabPET II system would be MR-compatible with some minor adjustments to operate effectively inside an MRI bore without interfering with its performance.
Facile synthesis of hierarchically porous carbons and their application as a catalyst support for methanol oxidation

We report the facile synthesis of hierarchically porous carbons and their application as a catalyst support for methanol oxidation. The honeycomb-like hierarchically porous carbons were synthesized by a facile self-assembly strategy, in which the template/carbon-precursor composite could be prepared in a one-pot approach by directly evaporating the reactant mixture solution of tetraethyl orthosilicate (TEOS) and phenolic resin. This synthesis process is simple and time-saving in comparison with the conventional casting methods. The as-prepared porous texture combines micropores, mesopores and macropores, mainly originating from the carbonized phenolic resin as well as the silica template formed with different sizes. The porous carbons have a large BET surface area of 664.75 m2 g−1 and partially graphitized structures. The morphology and porosity of the carbon product can be obviously affected by the corresponding experimental parameters. A preliminary study of the application of the as-prepared hierarchically porous carbons as the support for a Pt catalyst for methanol oxidation is performed. The porous carbon-supported Pt catalyst exhibits higher current density (120.6 mA mg−1) and stability in comparison with the carbon black-supported Pt catalyst. The as-prepared carbons with a hierarchically porous structure can effectively stabilize the Pt particles and alleviate the agglomeration of the particles during the cyclic voltammogram tests, suggesting potential application in the catalysts of direct methanol fuel cells.
Morphosynthesis of framboidal stable vaterite using a salicylic acid-aniline dye as an additive

Morphosynthesis and stabilization of pure framboidal vaterite microspheres using a salicylic acid–aniline dye as an additive has been reported in this paper. Formation and stabilization of vaterite crystals could be regulated by changing the dye concentration. Calcite rhombohedra were predominant species when no additive was added. As the concentration of dye was increased vaterite was more pronounced in the solution leading to the formation of pure framboidal vaterite (∼98% at 10 mM dye concentration). The size of these microspheres varied from 0.5 to 4.0 μm. Various instrumental analysis has been incorporated to study the dynamics of phase transformation throughout the process. Detailed analysis of TEM images reveals that vaterite microspheres were in turn aggregates of small vaterite nanospheres. The vaterite microspheres were stable up to a week in solution. The dissolution of the vaterite crystals to calcite was arrested by the presence of the dye at the nucleation process. The stability of the vaterite may be attributed to the strong electrostatic interaction of the Ca ions present on the surface of the crystal with the –COOH group of the dye. This finding opens up a new domain of organic additives to explore.
Discussion of “Monochloramine and Legionnaires' disease”

This paper discusses the hypothesis that monochloramine may be beneficial or control of Legionella in plumbing systems. Because monochloramine chlorine penetrates biofilms better than free chlorine, the hypothesis that chloramines are more effective in the biological niche of Legionella is biologically plausible. Investigators from the Centers for Disease Control and Prevention (CDC) presented a study in the September 2000 issue of Journal AWWA concluding that the use of monochloramine for disinfection of municipal water might prevent Legionnaires' disease. These authors suggested that 90 percent of hospital‐acquired outbreaks of Legionnaires' disease associated with drinking water might not have occurred if monochloramine had been used instead of free chlorine for residual disinfection.
Tropospheric Carbon Dioxide or Ozone Enrichments and Moisture Effects on Soil Organic Carbon Quality

Carbon, as an active component of organic matter, has considerable effects on soil quality and productivity. The objective of this study was to examine the effect of climate change variables on soil organic C (C{sub T}) quality in an agroecosystem. Wheat (Triticum aestivum L.) and soybean [Glycine max (L.) Merr] plants were grown in 3 m in diam. open-top field chambers and exposed to charcoal-filtered (CF) air at 350 {micro}L CO{sub 2} L{sup {minus}1}; CF air + 150 {micro}L CO{sub 2} L{sup {minus}1}; nonfiltered (NF) air + 35 nL O{sub 3} L{sup {minus}1}; and NF air + 35 nL O{sub 3} L{sup {minus}1} + 150 {micro}L CO{sub 2} L{sup {minus}1} at two soil moisture levels from 1994 to 1996. The 150 {micro}L CO{sub 2} L{sup {minus}1} addition was 18 h d{sup {minus}1} and the 35 nL O{sub 3} L{sup {minus}1} was 7 h d{sup {minus}1} from April until late October. In response to treatments, the C{sub T} contents did not change significantly; however, particulate, oxidizable, dissolved, humic (C{sub HA}) and fulvic (C{sub FA}{minus}) acid, and carbohydrate C pools increased in soils under CO{sub 2} enrichment and well-watered conditions but decreased under O{sub 3} stress compared with soils under CF ambientmore » air quality. Tropospheric CO{sub 2} enrichment and well-watered condition increased, and O{sub 3} stress decreased the log optical density slope for both C{sub HA} and C{sub FA} fractions more than CF ambient air and restricted moisture treatment. Also, the E{sub 465}/E{sub 665} ratios of both C{sub HA} and C{sub FA} fractions were higher for the CO{sub 2} enrichment and smaller for the O{sub 3} stress compared with CF ambient air quality. Results suggest that tropospheric CO{sub 2} enrichment and well-watered conditions may favor an accumulation of low molecular weight and more aliphatic quality of C and O{sub 3} stress favor high molecular weight and more aromatic quality of C. « less
Second Generation Micro-Orifice Uniform Deposit Impactor, 120 MOUDI-II: Design, Evaluation, and Application to Long-Term Ambient Sampling

The original MOUDI (Micro-Orifice Uniform Deposit Impactor) cascade impactor, reported in the literature in 1991, used an external gear system to achieve a uniform deposit and was intended for industrial hygiene studies with sample times in the range of minutes to a few hours. To facilitate much longer run times, a second generation MOUDI, MOUDI-II, which uses internal electric motors to rotate the impaction plates, was developed. Three model 120 MOUDI-IIs were used in a 32-month program to sample ambient atmospheric aerosols at several industrial and urban locations in Minnesota. For these sampling locations, each 120 MOUDI-II operated continuously for a minimum of five, and optimally 7 days, to collect a sample at a site. During these community sampling events, the three 120 MOUDI-IIs logged 4007, 2637, and 3230 h of operating time, respectively. A laboratory side-by-side comparison of the three 120 MOUDI-IIs showed good agreement amongst the three 120 MOUDI-IIs and, thus, the particle size distributions were independent of the 120 MOUDI-II used. Application of the 120 MOUDI-IIs for long-term ambient sampling was demonstrated by comparing size distributions from the background locations: Minneapolis, Duluth and Ely, Minnesota, representing urban, light industrial, and pristine area type of aerosols, respectively. PM2.5 averages from Minneapolis and Duluth compare well with three-year averages from state regulatory sampling. Copyright 2014 American Association for Aerosol Research
Evaluación de productos de control biológico de plagas por cañeros según su identificación social

La aceptación de los productores de innovaciones es relevante para el desarrollo del medio rural. Esta investigación validó una Escala de Auto-percepción de Identificación Social (EA-IS) con 61 productores cañeros de Veracruz, México en 2019 , y su relación con familiaridad de marcas, disposición a usar/probar y a comprar productos de control biológico. La EA-IS permitió identificar a productores tradicionales, en desarrollo y tecnificados. No hubo diferencias significativas en la EA-IS según la disposición a usar/probar/pagar por estos productos pero si para familiaridad. En conclusión, la EA-IS permite diferenciar productores según su auto-percepción de niveles de tecnificación, siendo los que se perciben como tecnificados los que aceptan más las innovaciones.
Molecular Dynamics Study of the Structure and Dynamics of Water in Cylindrical Pores

The structure and dynamics of confined water in cylindrical pores have been investigated by molecular dynamics simulations. Both rigid (TIP4P) and flexible (BJH) models have been used. Pore radii between 4.2 and 20 A have been studied; the pore walls are modeled either as a smooth (10−4) Lennard-Jones wall or as a structured wall consisting of (12−6) Lennard-Jones particles. Polar functional groups on the pore surface are modeled by arrays of point charges. We present results on density and orientational distribution functions and on the water mobility. We observe that water transport through nonpolar pores is fast and dominated by the surface layer, whereas transport in polar pores is slowed down relative to bulk liquid water and occurs preferentially through the center of the pore.
Controlled orientation and improved photovoltaic characteristics of Cu(In,Ga)Se 2 solar cells via using In 2 Se 3 seeding layers

In2Se3 films were utilized as seeding layers in the synthesis of Cu(In,Ga)Se2 films via the spin-coating route. Selenizing the indium-containing precursors at 400°C resulted in the formation of the hexagonal γ-In2Se3 with the preferred (006) orientation. Increasing the selenization temperature to 500°C yielded the (300)-oriented γ-In2Se3. Using the preferred (006)-oriented In2Se3 as seeding layers produced the preferred (112)-oriented Cu(In,Ga)Se2 film because of the crystalline symmetry. In contrast, the use of the (300)- oriented In2Se3 as seeding layers yielded the (220/204)-oriented Cu(In,Ga)Se2 films. According to results obtained using SEM and the Hall effect, (112)-oriented Cu(In,Ga)Se2 films had a denser morphology and more favorable electrical properties. Using the (112)-oriented Cu(In,Ga)Se2 films as the absorber layer in the solar devices resulted in a significant increase in the conversion efficiency.
Machine learning for quantum mechanics in a nutshell

Models that combine quantum mechanics (QM) with machine learning (ML) promise to deliver the accuracy of QM at the speed of ML. This hands-on tutorial introduces the reader to QM/ML models based on kernel learning, an elegant, systematically nonlinear form of ML. Pseudocode and a reference implementation are provided, enabling the reader to reproduce results from recent publications where atomization energies of small organic molecules are predicted using kernel ridge regression. © 2015 Wiley Periodicals, Inc.
Hydrogen Storage in Single-Walled and Multi-Walled Carbon Nanotubes

We performed density-functional calculations to search for adsorption sites and predict maximum hydrogen storage capacity in carbon nanotubes. Our calculations show that the storage capacity of hydrogen, limited by the repulsive forces between H2 molecules inside nanotubes, increases linearly with tube diameters in single-walled nanotubes, whereas this value is independent of tube diameters in multi-walled nanotubes. We predict that H storage capacity in (10,10) nanotubes can exceed 14 wt % (161 kg H2/m3).