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Ryo Suzuki, Kohta Ito, Taeyong Lee, Naomichi Ogihara
Accurate identification of the material properties of the plantar soft tissue is important for computer-aided analysis of foot pathologies and design of therapeutic footwear interventions based on subject-specific models of the foot. However, parameter identification of the hyperelastic material properties of plantar soft tissues usually requires an inverse finite element analysis due to the lack of a practical contact model of the indentation test. In the present study, we derive an analytical contact model of a spherical indentation test in order to directly estimate the material properties of the plantar soft tissue...
September 22, 2016: Journal of the Mechanical Behavior of Biomedical Materials
Yuyang Long, Jing Xu, Dongsheng Shen, Yao Du, Huajun Feng
Leachate membrane concentrates containing high concentrations of organics and trace toxic compounds pose a major threat to the environment, and their treatment is an urgent issue. In this work, various coagulants were used to treat leachate membrane concentrates. Appropriate pH values for treatments with FeCl2, FeSO4, polyaluminum chloride, and FeCl3 were 3, 5, 5, and 4, respectively. FeCl3 achieved the highest total organic carbon (TOC) removal efficiency. The effect of the various anions in ferric coagulants [FeCl3, Fe2(SO4)3, and Fe(NO3)3] on the TOC removal efficiency was negligible...
October 17, 2016: Chemosphere
Zhe Yang, Chao Shan, Weiming Zhang, Zhao Jiang, Xiaohong Guan, Bingcai Pan
Enhanced removal of As(V) and Se(VI) by zero valent iron (ZVI) has been recently revealed by using H2O2 as the corrosion accelerator, however, the detailed performance of such enhanced removal in ZVI column as well as the underlying mechanism is still unclear. In this study, the temporospatial evolution of As(V) and Se(VI) along a self-designed ZVI/H2O2 column in down-flow mode was systematically investigated. The variations of concerned aqueous parameters (pH, ORP, H2O2, Fe(2+), As, and Se) were monitored at different positions along the column throughout the experiments...
October 12, 2016: Water Research
Tao Wang, Yong Zhou, Chong Lei, Shaotao Zhi, Lei Guo, Hengyu Li, Zhizheng Wu, Shaorong Xie, Jun Luo, Huayan Pu
The disturbing effect of the stray magnetic fields of Fe-based amorphous ribbons on the giant magnetoimpedance (GMI) sensor has been investigated systematically in this paper. Two simple methods were used for examining the disturbing effect of the stray magnetic fields of ribbons on the GMI sensor. In order to study the influence of the stray magnetic fields on the GMI effect, the square-shaped amorphous ribbons were tested in front, at the back, on the left and on the top of a meander-line GMI sensor made up of soft ferromagnetic films, respectively...
October 17, 2016: Sensors
Cuizhen Sun, Jinwei Qiu, Zhibin Zhang, Taha F Marhaba, Yanhao Zhang
In this paper, flocculating performance and mechanisms of a new composite coagulant, poly-ferric aluminum chloride-polydimethyl diallylammonium chloride (PFAC-PD) with different OH(-)/(Fe(3+) + Al(3+)) molar ratios, were investigated for humic acid (HA)-kaolin synthetic wastewater treatment. The impact of OH(-)/(Fe(3+) + Al(3+)) molar ratios on the removal efficiencies of turbidity and dissolved organic carbon, specific UV absorbance, coagulation mechanisms and dynamics was explored during the coagulation process using composite coagulants...
October 2016: Water Science and Technology: a Journal of the International Association on Water Pollution Research
M Moskvin, D Horák
Maghemite (gamma-Fe2O3) nanoparticles, 12 nm in size, were prepared by co-precipitation of Fe(II) and Fe(III) chlorides with ammonium hydroxide and oxidation with hydrogen peroxide. To achieve stability and biocompatibility, obtained particles were coated with silica, to which glucose and ascorbic acid were bound by different mechanisms. The composite particles were thoroughly characterized by transmission electron microscopy, dynamic light scattering, elemental analysis, and FT-Raman and fluorescence spectroscopy to determine composition, morphology, size and its distribution, zeta-potential, and scavenging of peroxyl and hydroxyl radicals...
October 20, 2016: Physiological Research
Markus Bastir, Daniel García-Martínez, Nicole Torres-Tamayo, Juan Alberto Sanchis-Gimeno, Paul O'Higgins, Cristina Utrilla, Isabel Torres Sánchez, Francisco García Río
The human ribcage expands and contracts during respiration as a result of the interaction between the morphology of the ribs, the costo-vertebral articulations and respiratory muscles. Variations in these factors are said to produce differences in the kinematics of the upper thorax and the lower thorax, but the extent and nature of any such differences and their functional implications have not yet been quantified. Applying geometric morphometrics we measured 402 three-dimensional (3D) landmarks and semilandmarks of 3D models built from computed tomographic scans of thoraces of 20 healthy adult subjects in maximal forced inspiration (FI) and expiration (FE)...
October 19, 2016: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
Mihály Óvári, Miklós Laczi, János Török, Victor G Mihucz, Gyula Záray
The bulk analysis of single feathers of 263 feathers belonging to 238 individuals of a migratory passerine (collared flycatcher, Ficedula albicollis, originating from a breeding population in the Pilis-Visegrád Mountains in Hungary) by inductively coupled plasma sector field mass spectrometry (ICP-SF-MS) for determination of elements after proper dissolution allowed the quantitative determination of 38 elements. Calcium, Mg, Mn, Fe, and Zn were found to have a quantitative determination frequency larger than 80 % and a concentration greater than 100 μg/g...
October 20, 2016: Environmental Science and Pollution Research International
Zafar Iqbal Khan, Kafeel Ahmad, Sidrah Rehman, Samra Siddique, Humayun Bashir, Asma Zafar, Muhammad Sohail, Salem Alhajj Ali, Eugenio Cazzato, Giuseppe De Mastro
In the recent years, the use of sewage water for irrigation has attracted the attention of arid and semi-arid countries where the availability of fresh water is poor. Despite the potential use of sewage water in crop irrigation as effective and sustainable strategy, the environmental and human risks behind this use need to be deeply investigated. In this regard, an experiment was carried out under field conditions in Nursery, University College of Agriculture Sargodha, to evaluate the possible health risks of undesirable metals in wheat grains...
October 20, 2016: Environmental Science and Pollution Research International
Anatoly V Skalny, Elena V Zhukovskaya, Galina N Kireeva, Margarita G Skalnaya, Andrey R Grabeklis, Ivan V Radysh, Rosa A Shakieva, Alexandr A Nikonorov, Alexey A Tinkov
The primary aim of the study is assessment of hair and whole blood trace element and mineral levels in children living in a polluted area near a copper smelter (Karabash) and two control locations (Varna, Tomino) using inductively coupled plasma mass spectrometry. The obtained data indicates that both blood and hair As, Pb, and Fe levels in children living in Karabash significantly exceeded the control values. Whole blood levels of copper in children living in Varna exceeded that in Tomino (p = 0.155) and Karabash (p < 0...
October 19, 2016: Environmental Science and Pollution Research International
Yanhan Liu, Pan Hao, Xiao Zhang, Xiaona Zhao, Yongxia Liu, Jianzhu Liu
This study aimed to investigate the effects of chromic chloride (CrCl3) on Ca, Mg, Mn, Fe, Cu, and Zn contents in the brain and serum of chicken. Seventy-two chickens were randomly divided into four groups and treated with different doses of CrCl3 via drinking water: 0, 1/8, 1/4, and 1/2 LD50 for 42 days. The contents of the elements were evaluated through inductively coupled plasma mass spectrometry. Results showed that Cr contents in the brain and serum were higher than those in the control groups, although no significant dose-dependent changes (P > 0...
October 19, 2016: Biological Trace Element Research
Hiromitsu Nakajima, Kiminori Itoh
Scopelophila ligulata is known to be a Fe-hyperaccumulator moss; however, its mechanism of accumulation and the effects of Fe on pigments remain unclear. To clarify the effects, we measured its metal and pigment concentrations. The Fe concentration in S. ligulata was 10-61 times higher than that in normal mosses, confirming that the moss is a Fe-hyperaccumulator. The black samples of S. ligulata had the highest Fe concentration (2.9 wt%) and the second in the order of decreasing Fe concentration (2.2 wt%), which explains their color and indicates that the excess amount of Fe is distributed through the plant body...
October 19, 2016: Journal of Plant Research
S Shi, J F Wan, X W Zuo, N L Chen, J H Zhang, Y H Rong
The martensite/parent coherent interface of Mn-based shape memory alloys (SMAs) is a significant part in the research of their martensitic transformation, reversible shape memory effect and magnetic shape memory effect. In the present work, a chemical-structural model was proposed to calculate the martensite/parent coherent interfacial energy of Mn-X (X = Cu, Fe) alloys. In this model, the coherent heterophase interfacial energy consists of chemical and structural parts. Resulting from the formation process of the heterophase interface, the chemical interfacial energy is expressed as the incremental value of bond energy, while the structural part is obtained by calculating the interfacial strain energy...
October 20, 2016: Physical Chemistry Chemical Physics: PCCP
Christina Wegeberg, Christian Grundahl Frankær, Christine J McKenzie
The iodine L3-edge X-ray Absorption Near Edge Structure (XANES) of organic and inorganic iodine compounds with formal iodine oxidation states ranging from -1 to +7 shows edge energies spanning from 4560.8 eV to 4572.5 eV. These were used to calibrate the oxidation state of iodine in a unique iron complex of iodosylbenzene (PhIO), [Fe(tpena)OIPh](2+) (tpena(-) = N,N,N'-tris(2-pyridylmethyl)ethylenediamine-N'-acetate), which was found to be +1.6. Thus the iodine oxidation state is reduced by 1.4 compared with that in precursor uncoordinated PhIO...
October 20, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Jiangshan Ma, Keke Zhang, Mei Huang, Stanton B Hector, Bin Liu, Chunyi Tong, Qian Liu, Jiarui Zeng, Yan Gao, Ting Xu, Ying Liu, Xuanming Liu, Yonghua Zhu
BACKGROUND: Lignocellulolytic bacteria have revealed to be a promising source for biofuel production, yet the underlying mechanisms are still worth exploring. Our previous study inferred that the highly efficient lignocellulose degradation by bacterium Pantoea ananatis Sd-1 might involve Fenton chemistry (Fe(2+) + H2O2 + H(+) → Fe(3+) + OH· + H2O), similar to that of white-rot and brown-rot fungi. The aim of this work is to investigate the existence of this Fenton-based oxidation mechanism in the rice straw degradation process of P...
2016: Biotechnology for Biofuels
Somayeh Atari-Hajipirloo, Neda Valizadeh, Mohammad-Hassan Khadem-Ansari, Yousef Rasmi, Fatemeh Kheradmand
BACKGROUND: The altered levels of some essential trace elements and antioxidant minerals have been observed in diabetic patients. OBJECTIVES: The aim of the present study was to compare the concentrations of essential trace elements, copper (Cu), zinc (Zn), and iron (Fe) in the serum of patients who have type 2 diabetes mellitus (T2DM) with those of their non-diabetic first-degree relatives (FDR) and control subjects. The association between glycated hemoglobin (HbA1c) and levels of metals was also evaluated...
April 2016: International Journal of Endocrinology and Metabolism
Yunzhu Meng, Wansoo Pak, Berkan Guleyupoglu, Bharath Koya, F Scott Gayzik, Costin D Untaroiu
Child pedestrian protection deserves more attention in vehicle safety design since they are the most vulnerable road users who face the highest mortality rate. Pediatric Finite Element (FE) models could be used to simulate and understand the pedestrian injury mechanisms during crashes in order to mitigate them. Thus, the objective of the study was to develop a computationally efficient (simplified) six-year-old (6YO-PS) pedestrian FE model and validate it based on the latest published pediatric data. The 6YO-PS FE model was developed by morphing the existing GHBMC adult pedestrian model...
October 16, 2016: Accident; Analysis and Prevention
Haidong Tian, Yinfeng Zhang, Jingzhi Han, Zhuang Xu, Xiaodong Zhang, Shunquan Liu, Changsheng Wang, Yingchang Yang, Li Han, Jinbo Yang
Nd2Fe14B/α-Fe nanocomposite magnets are prepared through electron beam exposure with a greatly reduced annealing time of 0.1 s. This is by far the most effective approach due to the effect of an extremely high heating rate featuring a rapid thermal process. The impact that the rapid thermal process has on crystallization is expounded by the introduction of the Landau model and Langevin dynamical simulations. The change of crystallization sequence from the α-Fe phase preceding the Nd2Fe14B phase under conventional annealing conditions, to synergetic crystallization under electron beam conditions is investigated...
October 19, 2016: Nanoscale
Chongjun Zhao, Xiaoxiao Shao, Yuxiao Zhang, Xiuzhen Qian
A Fe2O3/RGO/Fe3O4 nanocomposite in-situ grown on Fe foil was synthesized via a simple one-step hydrothermal growth process, where the iron foil served as support, reductant of GO, Fe source of Fe3O4 and also the current collector of electrode. When it was directly acted as the electrode of a supercapacitor, as-synthesized Fe2O3/RGO/Fe3O4@Fe exhibited excellent electrochemical performance with high capability of 337.5 mF/cm2 at 20 mA/cm2 and superior cyclability with 2.3 % of capacity loss from 600th cycle to 2000th cycle...
October 19, 2016: ACS Applied Materials & Interfaces
Q Mahmood, M Hassan, N A Noor
The structural, magnetic and optical characteristics of Zn1-x TM x S/Se (TM  =  Mn, Fe, Co, Ni and x  =  6.25%) have been investigated through the full-potential linearized augmented plane wave method within the framework of density functional theory. The optimized structures have been used to calculate the ferromagnetic and the antiferromagnetic ground-state energies. The stability of the ferromagnetic phase has been confirmed from the formation and the cohesive energies. The Heisenberg model is used to elucidate the Curie temperature (T c) of these alloys...
October 19, 2016: Journal of Physics. Condensed Matter: An Institute of Physics Journal
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