Science topic

Iron - Science topic

A metallic element with atomic symbol Fe, atomic number 26, and atomic weight 55.85. It is an essential constituent of HEMOGLOBINS; CYTOCHROMES; and IRON-BINDING PROTEINS. It plays a role in cellular redox reactions and in the transport of OXYGEN.
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Article type: In a two-year experiment, the performance of Miyagawa satsuma mandarin was evaluated on Swingle citrumelo rootstock on soils with different amounts of lime. In a field experiment, plant growth trend, yield, and quality were studied in two regions (plain and piedmont) for 10 years. In the plain experiment, the highest shoot dry weight...
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Photocatalytic technology has been widely studied because of using solar energy to degrade pollutants with high efficiency. However, rapid recombination of the photogenerated charges results in low efficiency and instability. In this study, a novel MIL-101(Fe)/Bi2WO6 heterojunction with high efficient for degradation of organic pollutants from wast...
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For a sustainable future, industries need to maximize productivity and minimize waste. Gas cleaning process sludge, a waste generated from steel plants contains a significant amount of iron and carbon value which can be recovered and reutilize. The present study focused on the magnetic separation of iron values from the gas cleaning process sludge...
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In recent years, iron mediated autotrophic denitrification has been a concern because it overcomes the absence of organic carbon and has been successfully used in denitrification for low C/N ratio wastewater. However, there is currently a lack of a more systematic summary of iron-based materials that can be used for denitrification, and no detailed...
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Blast furnace gas (BFG) is an important energy-carrying byproduct of the iron and steel industry. High-accuracy prediction of BFG generation is the basis of the dynamic balance of gas supply–demand and energy scheduling. However, due to instrument faults, measurements of BFG are discontinuous or inaccurate, making it difficult to accurately predict...
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Nanoscale zero-valent iron (nZVI) has been extensively investigated as remediation materials. Understanding the influence of nZVI on sedimentary phosphorus mobilization is vital to its application in sediment remediation. In this study, the effects of aged nZVI (A-nZVI) amendment and capping on the mobilization of phosphorus from sediment to overly...
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What do people think of those who respond to confrontation by acknowledging personally prejudiced behavior? In six experiments (N = 3344), people judged a man who made a prejudiced comment and responded to confrontation by acknowledging, denying, or, in some cases, saying nothing about his prejudice. Participants consistently evaluated someone who...
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The cover image is based on the Research Article Stability and bonding of carbon(0)‐iron N2 complexes relevant to nitrogenase cofactor: EDA‐NOCV analyses by Sai Manoj N. V. T. Gorantla et al., https://doi.org/10.1002/jcc.27012
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We utilised resisto-thermal effect of iron smelting to precisely locate concealed furnaces and slag trenches at an ancient iron smelting site situated within the estate of Obafemi Awolowo University, Ile-Ife, Southwest Nigeria. The methodology involved closely spaced, small electrode spacing (micro) Vertical Electrical Soundings across diagnostic d...
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Extraintestinal pathogenic Escherichia coli (ExPEC) is a common anthropozoonotic pathogen that causes systemic infections. To establish infection, ExPEC must utilize essential nutrients including iron from the host. Transferrin is an important iron source for multiple bacteria. However, the mechanism by which ExPEC utilizes transferrin remains uncl...
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Monometallic (Ni, Co or Fe-SiC(O)) and bimetallic (Ni, Co or FeM-SiC(O) with M = Ni or Co) ceramic nanocomposites have been successfully prepared using polymeric precursors obtained by chemical modification of polycarbosilane with metal acetylacetonate. The nanocomposites consist of homogeneously distributed metal nanoparticles within an amorphous...
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The study evaluated the effects of lime and dolomite application (2 and 4 t ha⁻¹) in combination with NPK fertilizer (1 t ha⁻¹) or borax (50 kg ha⁻¹) on micronutrient concentrations in the raspberry leaves and fruits grown in the soil with a strongly acid reaction. Changes in the content of micronutrients (Fe, Mn, Cu, Zn, and B) and Al in the soil...
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Ferri/ferro-cyanide ([Fe(CN)6]3−/4−) redox couple has been extensively used as a benchmark to assess electrocatalytic degradation capability of boron-doped diamond (BDD) electrodes. However, the [Fe(CN)6]3−/4− is far more sensitive to the surface terminal groups of BDD surface than the other factors (e.g. surface morphology and electrode configurat...
Conference Paper
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Mersin (Silifke/Gülnar) iron and associated ore potential
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Red soil is often used for agriculture because it is fertile and well drained. This is especially beneficial for crops that require a lot of nutrients, such as bananas and sugarcane. Red soil can also be used to grow other types of crops, such as vegetables and fruits. It is necessary for us to know the properties of soil. We will study the Physico...
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Yttrium iron garnet (YIG) and barium titanate (BTO) were co-deposited on (001)-orientated gadolinium gallium garnet substrates by pulsed laser deposition with composition determined by the ratio of laser shots ablating each target. With increasing shot ratios of YIG/BTO = 2.5/1, 4/1, 20/1, and 30/1, the majority phase in the film changes from textu...
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Fe-N x nanoparticles-embedded porous carbons with a desirable superstructure have attracted immense attention as promising catalysts for electrochemical oxygen reduction reaction. Herein, we employed Fe-coordinated covalent triazine polymer for the fabrication of Fe-N x nanoparticle-embedded porous carbon nanoflorets (Fe/N@ CNFs) employing a hypers...
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It is important to explore efficient materials to alleviate the negative effect of atrazine in soils or water. In this paper, four Fe/Mn-modified biochars were prepared to enhance atrazine removal. The batch adsorption experiment was conducted to explore the adsorption ability of biochar(DBC) and modified biochars (F3M1DBC, F1M3DBC, MnDBC, and FeDB...
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In this study, magnesium nitrate, chloride or sulphate were used in the synthesis of Mg(OH)2, the precursor of MgO. It was found that the counter ion strongly influences the purity of the Mg(OH)2, as well as the specific surface area of the obtained MgO. The latter is also strongly influenced by the calcination temperature. The choice of the precip...
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The nature of TiFe-based surface oxides and their evolution during conventional activation heat treatment were investigated in this study. The as-prepared TiFe alloy was found to possess an initial composite Ti and Fe amorphous surface oxide layer of about 6 nm. Depth profiling has shown that oxides steadily vanish with increasing depth, whereas me...
Preprint
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We present a sample of 2700 Ap stars in LAMOST DR9. The candidates are first selected to be in a temperature range typical of Ap stars by using the $BP$-$RP$ color index from Gaia DR3. Then the 5200\,\AA\ flux depression features characteristic of Ap stars are visually checked in LAMOST DR9 spectra. The detailed spectral features are given by apply...
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Iron−nitrogen−carbon (Fe−N−C) materials emerged as one of the best non-platinum group material (non-PGM) alternatives to Pt/C catalysts for the electrochemical reduction of O 2 in fuel cells. Co-doping with a secondary metal center is a possible choice to further enhance the activity toward oxygen reduction reaction (ORR). Here, classical Fe−N−C ma...
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Após sessenta anos de clausura, a abertura provisória do Mosteiro da Cartuxa de Santa Maria Scala Coeli de Évora permitiu apreciar, ao vivo, a arte de um monge-pintor cuja valência possibilitou a constituição de um acervo que não se circunscreve à temática religiosa mas vai muito para além dela. A reflexão proposta pretende pois enunciar parte da...
Conference Paper
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The iron ore industry faces the transition to low grade deposits such as an increasing pressure for a more sustainable approach. In this sense, there is an arising importance of concentration methods that can improve quality of lump material. In this context, the sensor based sorting technology appears as an option for increasing lump quality by ap...
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Direct amination of C-H or C=C bonds using unprotected amino groups are very challenging, especially with earth abundant metal ions. Here we show that a bioinspired iron(II) complex catalyses the...
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We have performed detailed high-resolution spectroscopic analysis on seven metal-poor stars (BD+75 348, BD+09 3019, HD238020, HE0319-0215, HE0507-1653, HE0930-0018, HE1023-1504) and derived their atmospheric parameters Teff, logg, [Fe/H], and mictroturbulent velocity (ξ). The metallicity range is found to be -2.57<[Fe/H]<-0.42. The elemental abunda...
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Understanding the catalytic performance of different materials is of crucial importance for achieving further technological advancements. This especially relates to the behaviors of different classes of catalysts under operating conditions. Here, we analyzed the effects of local coordination of metal centers (Mn, Fe, Co) in graphene-embedded single...
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Heavy menstrual bleeding (HMB) is profuse, acyclic bleeding from the genital tract, with or without clots, usually lasting more than 10 days. They are the most common cause of abnormal uterine bleeding in adolescence. The following are used in the treatment: iron preparations, antifibrinolytic drugs, NSAIDs, estrogen-progestagen therapy or progesta...
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При исследовании магматических пород шатакского комплекса были обнаружены ранее не отмечавшиеся, нетипичные минералы, представленные природной бронзой, никелистой α-латунью, дисилицидом железа и интерметаллидами системы Cu — Sn — Ti. В результате проведенных исследований установлено, что генезис самородной бронзы удовлетворительно описывается эволю...
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The propagation of spin waves in magnetically ordered systems has emerged as a potential means to shuttle quantum information over large distances. Conventionally, the arrival time of a spin wavepacket at a distance, $d$, is assumed to be determined by its group velocity, $v_g$. He we report time-resolved optical measurements of wavepacket propagat...
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A MIL-53(Fe)/g-C3N4 heterogeneous composite was synthesized and applied in photocatalytic oxidation of 5-hydroxymethylfurfural (5-HMF) to 2,5-diformylfuran (DFF). The systematic investigation indicated that the introduction of MIL-53(Fe) into g-C3N4 increased the specific surface area, broadened the visible-light response region, and promoted the s...
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Deuterated organic molecules are of interest for many applications ranging from mechanistic investigations in basic organic and physical chemistry to the development of new pharmaceuticals. Thus, methodologies for isotope labelling reactions continue to be important. Here, a convenient methodology for hydrogen/deuterium exchange reactions in electr...
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Magneto-rheological gel (MRG) has been the subject of recent research due to its versatile applications. Especially, the magneto-induced electrical properties of MRGs under different levels of magnetic field enables them to be used as magneto-sensors. However, conventional MRG shows a low level of electrical conductivity, complicating its use in se...
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Raktham Jeeva iti Sthiti" which means the Jeeva (life) of a person resides in Raktha (Blood), any severe impairment or loss of Blood can lead to Death. Hence Pandu roga which leads to loss of blood is of a major concern regarding its prevention and cure. The disease Pandu Roga is said to be Rasa Pradoshaja Vyadhi and also a Santarpanajanya Vyadhi....
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Salivary gland tumours (SGTs) are a heterogeneous group of benign tumours of various origins and pathologies, showing a number of DNA modifications. Previously, in malignant head and neck cancer (HNSCC), we found overexpression of ALKBH proteins, the homologs of Escherichia coli AlkB 2-oxoglutarate and Fe(II) dependent dioxygenase. Moreover, we pro...
Conference Paper
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Kráterem číslo 4 u Emmertingu v pozdně glaciální terase řeky Alz se podrobněji zabývali Rösler et al. (2006). Přímé důkazy o impaktu nenašli, v podstatě však ukázali, že neexistuje životaschopná alternativa. Nic na tom nemění ani pochopitelné námitky proti teorii považující tento kráter za součást dopadového pole s více než 100 dochovanými impaktní...
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With the rapid development of electric vehicles, the safety accidents caused by the damage and failure of lithium-ion batteries under mechanical load are increasing gradually, which increases the significance of collision safety in lithium-ion batteries. The failure threshold of the cell in a free state is different from that of the cells in the mo...
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The study was conducted for the period between 12/3/2019 to 12/1/2020 in the city of Samarra, and 344 samples were collected for different ages, and the number of injuries was 164, i.e. 47.6%. 18.3% of children of the age group 9-13 were injured by 6.6%. The tests of some biochemical variables showed a significant difference at the level of (0.000)...
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As the main resource of greenhouse gas, CO2 needs to be fixed into different chemicals to relieve the environmental problem. Fe-based catalyst and g-C3N4 have received extensive attention due to their easy preparation, low cost, and environmental friendliness. Herein, a heterogeneous catalyst system consisting of rich-electron g-C3N4 and strong ele...
Preprint
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At $x\approx0.25$ $\mathrm{Ba}_{1-x}\mathrm{K}_{x}\mathrm{Fe}_{2}\mathrm{As}_{2}$ undergoes a novel first-order transition from a four-fold symmetric double-Q magnetic phase to a two-fold symmetric single-Q phase, which was argued to occur simultaneously with the onset of superconductivity (B\"ohmer et al., Nat. Comm. 6, 7911 (2015)). Here, by appl...
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Transition metal pollution in rivers in South Asia is more serious than in other regions because of the lack of adequate freshwater management measures. Water quality criteria (WQC) for South Asia is urgently needed to protect regional aquatic environments because of the occurrence of transboundary rivers. The present study established non-parametr...
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El presente artículo se centra en la disolución de la Real Audiencia de Santa Fe, corazón del aparato judicial del antiguo Virreinato de la Nueva Granada. La historiografía se ha centrado en mayor medida en las transformaciones políticas y sociales que sufrió la antigua Colombia, en lugar de en el colapso que sufrieron las instituciones españolas y...
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The stability of the stored information in magnetic recording media depends on the anisotropy energy E a (=K eff V) of nanoparticles (NPs) of volume V or diameter D. Therefore, it is important to know how the effective anisotropy constant K eff varies with size D of the NPs. In a recent paper [Appl. Phys. Lett. 110, 222409 (2017)], the observed K e...
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Artigo técnico sobre biofortificação agronómica tomate em Mg (para processamento industrial) e em Zn e Fe (produzido em modo biológico). Revista "Frutas, Legumes e Flores": https://www.flfrevista.pt/sobre-nos/
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The authors investigated tribological characteristics, phase composition of friction surfaces and microhardness of near-surface regions of WC–(Fe–Mn–C) composites with a two-phase (γ + α′) matrix containing 4 % wt. Mn (WC – 80G4), and a single-phase matrix of γ-iron containing 20 % wt. Mn (WC – 80G20) after friction on a disk of high-speed steel at...
Article
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Considerando o problema do tratamento final do esgoto e a necessidade crescente de produção de mudas florestais, este estudo objetivou avaliar o efeito de diferentes substratos contendo Lodo de Esgoto (LE) na produção de mudas de Schinus terebinthifolius Raddi. Quatro tratamentos foram implementados contendo diferentes proporções de LE. Após 180 di...
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The L-shell X-ray emissions of iodine are investigated as a function of the incident energy for I ²²⁺ ions impacting on Fe target in the energy region near the Bohr velocity. Six distinct L-subshell X-rays, Lι, Lα 1, 2 , Lβ 1, 3, 4 , Lβ 2, 15 , Lγ 1 and Lγ 2, 3, 4, 4 ' , are observed. Compared to the atomic data, the energy of the experimental X ra...
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Pendahuluan: Anemia menjadi salah satu faktor penyebab kematian ibu secara tidak langsung. Anemia dalam kehamilan merupakan kondisi ibu dengan kadar hemoglobin ibu kurang dari 11,0 g/dL pada trimester pertama dan ketiga serta kadar hemoglobin kurang dari 10,5 g/dL pada trimester kedua. Tujuan: Mengetahui faktor yang mempengaruhi anemia dalam kehami...
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Neumann band in iron meteorites, which is deformation twins in kamacite (Fe–Ni alloy), has been known to be a characteristic texture indicating ancient collisions on parent bodies of meteorites. We conducted a series of shock recovery experiments on bcc iron with the projectile velocity at 1.5 km/s at various initial temperatures, room temperature,...
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We investigated 2 and 2.9 μm mid-infrared fiber lasers passively Q-switched by MIL-68(Al) and MIL-68(Fe), which were fabricated via the hydrothermal method. The modulation depth of MIL-68(Al) was found to be 9.12% at 1.99 μm. And the modulation depths of MIL-68(Fe) were found to be 18.89% and 15.79% at 1.99 μm and 2.87 μm, respectively. We report Q...
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The ⁵⁷Fe Mössbauer spectrum obtained after ⁵⁷Mn (T1/2 = 1.45 min) implantation of solid hydrogen was measured at 7 K. The spectrum was analyzed as three components, and the chemical species of each component was assigned from the obtained Mössbauer parameters and the results of density functional theory (DFT) calculations. The formation process of...
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Modification of bentonite by the Al/Fe metal oxide pillarization process has been carried out with metal oxides. The bentonite pillars were successfully characterized using an X-Ray Diffraction (XRD) spectrophotometer. The results of XRD characterization showed the peak diffraction angle (2θ) in metal-pillared bentonite was 26.84° at 698.98 cps. Me...
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The urgency of this study aims to explain the actualization of Christian religious education which currently seems not to be going in rhythm with various expectations. This condition occurs because of the rapid demands of science and information networks development in the era of the industrial revolution 4.0 intertwined with waves of disruption. I...
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More recently, the L10 MnPt alloy has received massive attention in data storage applications such as spintronics due to its high ferromagnetic stability and very high Néel temperature. It was found that L10 MnPt alloy showed ferromagnetic behaviour at room temperature. In this study, the effect of introducing antiferromagnetic (Cr) and ferromagnet...
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Although Ag nanoparticles (NPs) have been widely applied in daily life and in biomedical and industrial fields, there is a demand for Ag-based bimetallic nanoalloys (NAs), such as AgCu and AgFe, due to their enhanced antibacterial efficacy and reduced Ag consumption. In this work, we present a comparison study on the antibacterial efficacy and cyto...
Article
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Shock compression of an additively manufactured high-entropy alloy, Cr10Mn10Fe60Co10Ni10, is investigated via gas-gun plate impact. The postmortem sample shocked to 11.3 GPa is characterized with electron back-scattered diffraction and transmission electron microscopy; two phase transitions are observed, the face-centered cubic (FCC) to hexagonal c...
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The focus of this investigation is the interface regions in crystalline Fe-nanoparticles as well as amorphous nanograins with an average grain size of about 4 nm. The iron nanograins have been compacted under external pressure; the resulting region of the contact between the grains is called an interface. It was found that the interface was three-d...
Article
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To study the oxidation behavior of a commonly used pipeline materials of 37Mn5 steel in the process of fire flooding technology, a simulation device of organic fuel combustion was designed and used for comparative study between air and kerosene atmosphere. The products generated after kerosene combustion greatly affected the growth of iron oxides a...
Article
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Magnetic characteristics of magnetostrictive materials at elevated frequencies largely determine the performance and energy efficiency of devices based on them. The paper presents the wide frequency and magnetic field range dependences of core losses and permeability in classical binary alloy Fe 81 Ga 19. For a more detailed analysis, we carried ou...
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Due to their low production cost and rich resource availability, Na-ion batteries have emerged as the best option for grid-scale energy storage systems. Nonetheless, the commercialization of Na-ion batteries has been hampered by a shortage of acceptable anode and cathode materials. In this work, we report a superior Na-ion full cell constructed usi...
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Desde la teología espiritual agustiniana, el artículo propone que la interioridad cristiana tiene el potencial de constituir un elemento de discernimiento, que involucra al creyente en la mística de lo comunitario y procura los valores del bien común, como antagónico a una fe privatizada. El análisis busca, a partir de la experiencia espiritual de...
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Being the dietary staple in most Asian countries, the concentrations of toxic and essential element content in rice is an important aspect in terms of both toxicological and nutritional standpoints. This study aimed to analyse trace elements (As, Cd, Pb, Hg, Cr, Ni, Zn, Cu, Mn, Fe, and Mo) in improved, traditional, and imported rice varieties consu...
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Objective The objective of this study was to identify the diagnostic performance of video capsule endoscopy (VCE) among patients presenting with iron deficiency anaemia (IDA) and negative bidirectional endoscopy to a gasteroendoscopy practice in regional Australia. The secondary objectives were to identify the distribution of findings and factors p...
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The present work has been focused on the removal of fluoride from aqueous solutions through the electrocoagulation process. This work aimed to assess the efficiency of electrodes and electrocoagulation process in fluoride removal from aqueous solutions. Batch experiments were carried out using monopolar Iron and Copper electrodes as anode and catho...