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https://www.readbyqxmd.com/read/28350488/effect-of-supplemental-trace-minerals-on-hsp-70-mrna-expression-in-commercial-broiler-chicken
#1
U Rajkumar, A Vinoth, E Pradeep Kumar Reddy, M Shanmugam, S V Rama Rao
The effects of supplementing the organic forms of selenium (Se), chromium (Cr), and zinc (Zn) on Hsp-70 mRNA expression and body weight in broiler chickens were evaluated. 200 chicks were equally distributed into stainless steel battery brooders at the rate of 5 birds per pen and reared under heat stress condition up to 42(nd) day. The chicks were fed with three experimental diets supplemented with organic forms of Se (0.30 mg/kg), Cr (2 mg/kg), and Zn (40 mg/kg) during the starter and finisher phases and a control diet without any supplementation...
March 28, 2017: Animal Biotechnology
https://www.readbyqxmd.com/read/28345659/oral-chromium-picolinate-impedes-hyperglycemia-induced-atherosclerosis-and-inhibits-proatherogenic-protein-tsp-1-expression-in-stz-induced-type-1-diabetic-apoe-mice
#2
Rituparna Ganguly, Soumyadip Sahu, Vahagn Ohanyan, Rebecca Haney, Ronaldo J Chavez, Shivani Shah, Siri Yalamanchili, Priya Raman
Increasing evidence suggests thrombospondin-1 (TSP-1), a potent proatherogenic matricellular protein, as a putative link between hyperglycemia and atherosclerotic complications in diabetes. We previously reported that the micronutrient chromium picolinate (CrP), with long-standing cardiovascular benefits, inhibits TSP-1 expression in glucose-stimulated human aortic smooth muscle cells in vitro. Here, we investigated the atheroprotective action of orally administered CrP in type 1 diabetic apolipoprotein E-deficient (ApoE(-/-)) mice and elucidated the role of TSP-1 in this process...
March 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28345038/ultra-robust-high-field-magnetization-plateau-and-supersolidity-in-bond-frustrated-mncr2s4
#3
Vladimir Tsurkan, Sergei Zherlitsyn, Lilian Prodan, Viorel Felea, Pham Thanh Cong, Yurii Skourski, Zhe Wang, Joachim Deisenhofer, Hans-Albrecht Krug von Nidda, Joahim Wosnitza, Alois Loidl
Frustrated magnets provide a promising avenue for realizing exotic quantum states of matter, such as spin liquids and spin ice or complex spin molecules. Under an external magnetic field, frustrated magnets can exhibit fractional magnetization plateaus related to definite spin patterns stabilized by field-induced lattice distortions. Magnetization and ultrasound experiments in MnCr2S4 up to 60 T reveal two fascinating features: (i) an extremely robust magnetization plateau with an unusual spin structure and (ii) two intermediate phases, indicating possible realizations of supersolid phases...
March 2017: Science Advances
https://www.readbyqxmd.com/read/28343670/comparison-of-porcelain-bond-strength-of-different-metal-frameworks-prepared-by-using-conventional-and-recently-introduced-fabrication-methods
#4
Necati Kaleli, Duygu Saraç
STATEMENT OF PROBLEM: Most studies evaluating dental laser sintering systems have focused on the marginal accuracy of the restorations. However, the bond strength at the metal-ceramic interface is another important factor that affects the survival of restorations, and currently, few studies focus on this aspect. PURPOSE: The purpose of this in vitro study was to compare the porcelain bond strength of cobalt-chromium (Co-Cr) metal frameworks prepared by using the conventional lost-wax technique, milling, direct metal laser sintering (DMLS), and laser cusing, a direct process powder-bed system...
March 23, 2017: Journal of Prosthetic Dentistry
https://www.readbyqxmd.com/read/28342047/blood-toxic-metals-and-hemoglobin-levels-in-mexican-children
#5
Guadalupe López-Rodríguez, Marcos Galván, Marco González-Unzaga, Juan Hernández Ávila, M Pérez-Labra
Metal toxicity can cause hematologic abnormalities and hemolysis. To evaluate the relationship of anemia with metal contamination in children, the following elements were quantified in dry blood: silicon, chromium, lead, titanium, vanadium, nickel, arsenic, manganese, and cadmium. A total of 88 samples of anemic children and 208 of non-anemic children aged 6-12 years were analyzed. Lead (35.1%), chromium (24.3%), vanadium (24.3%), nickel (45.6%), and silicon (48.6%) were identified in the samples, with titanium only detected in anemic children...
April 2017: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/28341314/fretting-and-corrosion-at-the-backside-of-modular-cobalt-chromium-acetabular-inserts-a-retrieval-analysis
#6
T David Tarity, Chelsea N Koch, Jayme C Burket, Timothy M Wright, Geoffrey H Westrich
BACKGROUND: Adverse local tissue reaction formation has been suggested to occur with the Modular Dual Mobility (MDM) acetabular design. Few reports in the literature have evaluated fretting and corrosion damage between the acetabular shell and modular metal inserts in this modular system. We evaluated a series of 18 retrieved cobalt chromium MDM inserts for evidence of fretting and corrosion. METHODS: We assessed the backsides of 18 MDM components for evidence of fretting and corrosion in polar and taper regions based on previously established methods...
March 2017: Journal of Arthroplasty
https://www.readbyqxmd.com/read/28341265/does-a-titanium-sleeve-reduce-the-frequency-of-pseudotumors-in-metal-on-metal-total-hip-arthroplasty-at-5-7years-follow-up
#7
M H Hjorth, N Egund, I Mechlenburg, J Gelineck, S S Jakobsen, K Soballe, M Stilling
INTRODUCTION: Little is known about pseudotumor frequency and risk factors for pseudotumor formation among different types of metal-on-metal (MoM) hip arthroplasties. A lower release of chromium and cobalt have been reported in MoM hip arthroplasties with a titanium sleeve compared to MoM designs without a titanium sleeve, but yet it is unknown whether a titanium sleeve reduces the pseudotumor frequency. We conducted a cross-sectional study to investigate: 1) pseudotumor frequency, 2) risk factors of pseudotumor formation 3) and correlations between pseudotumors, serum metal-ions, implant position, and clinical symptoms...
December 2016: Orthopaedics & Traumatology, Surgery & Research: OTSR
https://www.readbyqxmd.com/read/28341153/elemental-distribution-and-trace-metal-contamination-in-the-surface-sediment-of-south-east-coast-of-india
#8
S Barath Kumar, R K Padhi, A K Mohanty, K K Satpathy
Spatial distribution and potential ecological risk of trace metals in the surface sediment of south east coast of India covering eight different ecosystems was studied. The concentration of major elements viz. Ca, Mg, K, Ti and trace metals viz. Cr, Mn, Co, Al, Fe, Ni, Cu, Zn, Cd and Pb were analysed by energy dispersive X-ray fluorescence technique. Contamination factor, geo-accumulation index, probable effect level, enrichment factor and pollution load index were calculated to evaluate the pollution status...
January 30, 2017: Marine Pollution Bulletin
https://www.readbyqxmd.com/read/28340768/sio2-coated-magnetic-graphene-oxide-modified-with-polypyrrole-polythiophene-a-novel-and-efficient-nanocomposite-for-solid-phase-extraction-of-trace-amounts-of-heavy-metals
#9
Karam Molaei, Hasan Bagheri, Ali Akbar Asgharinezhad, Homeira Ebrahimzadeh, Mojtaba Shamsipur
The synthesis of a novel nanocomposite comprised of SiO2-coated magnetic graphene oxide modified with a pyrrole-thiophene (mGO/SiO2@coPPy-Th) copolymer is reported in the present work. The nanocomposite was applied for the fast magnetic solid phase extraction (MSPE) of trace levels of copper, lead, chromium, zinc and cadmium from water and agricultural samples. The nanocomposite was prepared in three steps: (1) decoration of graphene oxide sheets with magnetite nanoparticles thorough a facile one-step chemical reaction strategy; (2) chemical grafting by a silica layer to obtain high stability in acidic solutions; and (3) surface modification by coPPy-Th via simultaneous oxidation polymerization of pyrrole and thiophene in the presence of mGO/SiO2 composite...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28340464/a-review-on-various-electrochemical-techniques-for-heavy-metal-ions-detection-with-different-sensing-platforms
#10
REVIEW
BabanKumar Bansod, Tejinder Kumar, Ritula Thakur, Shakshi Rana, Inderbir Singh
Heavy metal ions are non-biodegradable and contaminate most of the natural resources occurring in the environment including water. Some of the heavy metals including Lead (Pb), Mercury (Hg), Arsenic (As), Chromium (Cr) and Cadmium (Cd) are considered to be highly toxic and hazardous to human health even at trace levels. This leads to the requirement of fast, accurate and reliable techniques for the detection of heavy metal ions. This review presents various electrochemical detection techniques for heavy metal ions those are user friendly, low cost, provides on-site and real time monitoring as compared to other spectroscopic and optical techniques...
March 18, 2017: Biosensors & Bioelectronics
https://www.readbyqxmd.com/read/28340388/evaluation-of-cr-vi-reduction-mechanism-and-removal-by-cellulosimicrobium-funkei-strain-ar8-a-novel-haloalkaliphilic-bacterium
#11
Chinnannan Karthik, Selvaraj Barathi, Arivalagan Pugazhendhi, Vijayan Sri Ramkumar, Ngoc Bao Dung Thi, Padikasan Indra Arulselvi
The present study, a novel haloalkaliphilic Cr(VI) tolerant bacterial strain, Cellulosimicrobium funkei AR8, was isolated and characterized for its high Cr(VI) reduction. In batch experiments, Cr(VI) reduction was evaluated under different parametric conditions which include different pH (5-9), temperature (25-45°C), NaCl (0-3%) and Cr(VI) concentrations (100-250μg/ml). Variations in the cell surface functional groups and morphology of the bacterial cells after Cr(VI) reduction were characterized by FT-IR and SEM-EDX...
March 18, 2017: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/28338475/evidence-of-a-permanent-electric-polarisation-in-highly-strained-cr2o3-clusters-measured-by-a-second-harmonic-generation-technique
#12
Mohamad Hamieh, Kokoo Dorkenoo, Gregory Taupier, Yves Henry, David Halley
We investigate the second harmonic generation (SHG) signal in strained Cr2O3 clusters. We show that the SHG signal generated by nanometric Cr2O3 clusters embedded in MgO varies under an applied electric field, at room temperature. The variation of the intensity follows a Langevin law as a function of the electric field, which is consistent with a super-paraelectric clusters assembly. This reveals the presence of a weak spontaneous electric dipole in Cr2O3 when in the shape of highly strained epitaxial clusters, whereas this material does not posses any permanent electric dipole in the bulk phase...
March 24, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28337973/crystal-growth-structure-and-magnetic-properties-of-ca-sub-10-sub-cr-sub-7-sub-o-sub-28-sub
#13
Christian Balz, Bella Lake, Manfred Reehuis, A T M Islam, Oleksandr Prokhnenko, Yogesh Singh, Philip Pattison, Sandor Toth
A detailed diffraction study of Ca<sub>10</sub>Cr<sub>7</sub>O<sub>28</sub> is presented which adds significant new insights into the structural and magnetic properties of this compound. A new crystal structure type was used where the a and b axes are doubled compared to previous models providing a more plausible structure where all crystallographic sites are fully occupied. The presence of two different valences of chromium was verified and the locations of the magnetic Cr<sup>5+</sup> and non-magnetic Cr<sup>6+</sup> ions were identified...
March 24, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28337961/biosorption-of-heavy-metals-from-aqueous-solution-by-bacteria-isolated-from-contaminated-soil
#14
Pradeep Dhanwal Anil Kumar Shruti Dudeja Hemlata Badgujar Rohit Chauhan Abhishek Kumar Poonam Dhull Vinod Chhokar Vikas Beniwal
The study was carried out to analyze the heavy metals biosorption potential of bacteria isolated from electroplating industrial effluents contaminated soil. Bacterial isolates were screened for their multi-metal biosorption potential against copper, nickel, lead and chromium. Bacterial isolate CU4A showed maximum uptake of copper, nickel, lead and chromium in aqueous solution with biosorption efficiency as 87.16 %, 79.62%, 84.92% and 68.12%, respectively. The bacterial strain CU4A was identified as Bacillus cereus following 16S rRNA gene sequence analysis...
March 9, 2017: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28335545/reference-values-of-14-serum-trace-elements-for-pregnant-chinese-women-a-cross-sectional-study-in-the-china-nutrition-and-health-survey-2010-2012
#15
Xiaobing Liu, Yu Zhang, Jianhua Piao, Deqian Mao, Yajie Li, Weidong Li, Lichen Yang, Xiaoguang Yang
The development of reference values of trace elements is recognized as a fundamental prerequisite for the assessment of trace element nutritional status and health risks. In this study, a total of 1400 pregnant women aged 27.0 ± 4.5 years were randomly selected from the China Nutrition and Health Survey 2010-2012 (CNHS 2010-2012). The concentrations of 14 serum trace elements were determined by high-resolution inductively coupled plasma mass spectrometry. Reference values were calculated covering the central 95% reference intervals (P2...
March 21, 2017: Nutrients
https://www.readbyqxmd.com/read/28335337/effect-of-crystal-orientation-on-self-assembly-nanocones-formed-on-tungsten-surface-induced-by-helium-ion-irradiation-and-annealing
#16
Shilin Huang, Guang Ran, Penghui Lei, Shenghua Wu, Nanjun Chen, Ning Li
The self-assembly nanocone structures on the surface of polycrystalline tungsten were created by He⁺ ion irradiation and then annealing, and the resulting topography and morphology were characterized using atomic force microscopy and scanning electron microscopy. The cross-sectional samples of the self-assembly nanocones were prepared using an in situ-focused ion beam and then observed using transmission electron microscopy. The self-assembly nanocones were induced by the combined effect of He⁺ ion irradiation, the annealing process and the chromium impurity...
November 12, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335301/facile-synthesis-of-g-c%C3%A2-n%C3%A2-nanosheets-zno-nanocomposites-with-enhanced-photocatalytic-activity-in-reduction-of-aqueous-chromium-vi-under-visible-light
#17
Xiaoya Yuan, Chao Zhou, Qiuye Jing, Qi Tang, Yuanhua Mu, An-Ke Du
Graphitic-C₃N₄ nanosheets (CN)/ZnO photocatalysts (CN/ZnO) with different CN loadings were successfully prepared via a simple precipitation-calcination in the presence of exfoliated C₃N₄ nanosheets. Their morphology and structure were thoroughly characterized by powder X-ray diffraction (XRD), scanning electron microscopy (SEM), high-resolution transmission electron microscopy (HRTEM), X-ray photoelectron spectroscopy (XPS), UV-Vis diffuse reflectance spectroscopy (DRS) and photoluminescence spectra (PL)...
September 14, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334498/multi-shelled-hollow-metal-organic-frameworks
#18
Wenxian Liu, Jijiang Huang, Qiu Yang, Shiji Wang, Xiaoming Sun, Weina Zhang, Junfeng Liu, Fengwei Huo
Hollow metal-organic frameworks (MOFs) are promising materials with sophisticated structures, such as multiple shells, that cannot only enhance the properties of MOFs but also endow them with new functions. Herein, we show a rational strategy to fabricate multi-shelled hollow chromium (III) terephthalate MOFs (MIL-101) with single-crystalline shells through step-by-step crystal growth and subsequent etching processes. This strategy relies on the creation of inhomogeneous MOF crystals in which the outer layer is chemically more robust than the inner layer and can be selectively etched by acetic acid...
March 23, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28333062/in-situ-synthesis-of-layered-double-hydroxides-on-%C3%AE-al2o3-and-its-application-in-chromium-vi-removal
#19
Shifeng Li, Fang Qi, Min Xiao, Hongtao Fan, Yanming Shen, Kaige Du, Zhigang Zhang, Wenxiu Li
Mg-Al layered double hydroxides (LDHs) adsorbent was synthesized in situ on γ-Al2O3 for the removal of Cr(VI) from aqueous solution. The material was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy, Raman spectroscopy, scanning electronic microscopy and thermogravimetry and differential thermal analysis. Compared to the LDHs powder, the calcined LDHs sorbent prepared in situ on γ-Al2O3 had higher specific surface area and was easy to recover and reuse. The adsorptive capacity for removing Cr(VI) from aqueous solution was resulting from the memory effect of LDHs based on the XRD results...
March 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28332950/spatiotemporal-trend-analysis-of-metal-concentrations-in-sediments-of-a-residential-california-stream-with-toxicity-and-regulatory-implications
#20
Lenwood W Hall, Ronald D Anderson, William D Killen
The objective of this study was to determine if concentrations of arsenic, cadmium, chromium, copper, lead, nickel and zinc measured in the sediments of a residential stream in California (Pleasant Grove Creek) have changed temporally or spatially from 2006 to 2016. Threshold Effect Levels (TELs), conservative ecological effects benchmarks, and exceedances for the seven metals were also evaluated over the 11-year time period to provide insight into potential metal toxicity to resident benthic communities. In addition, the bioavailability of metals in sediments was also determined by calculating Simultaneous Extracted Metal/Acid Volatle Sulfide (SEM/AVS) ratios to allow an additional assessment of toxicity...
March 23, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
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