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https://www.readbyqxmd.com/read/27925277/identification-of-sources-of-metal-in-the-agricultural-soils-of-guanzhong-plain-northwest-china
#1
Wenbo Deng, Xuxiang Li, Zhisheng An, Liu Yang, Kang Hou, Yue Zhang
In this study, we conducted a comprehensive survey to assess the possible sources and distribution of metals in the agricultural soils of Guanzhong Plain, northwest China. A total of 227 samples of agricultural soil were collected to determine the content of Pb, Cr, Co, V, Ni, Zn, Cu, As and Mn by X-ray fluorescence spectrometry. The mean concentrations of metals were 26.2 ± 10.8 mg · kg(-1) , 71.5 ± 16.8 mg · kg(-1) , 12.7 ± 1.81 mg · kg(-1) , 85.1 ± 7.86 mg · kg(-1) , 30...
December 7, 2016: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/27924919/a-central-cavity-within-the-holo-translocon-suggests-a-mechanism-for-membrane-protein-insertion
#2
Mathieu Botte, Nathan R Zaccai, Jelger Lycklama À Nijeholt, Remy Martin, Kèvin Knoops, Gabor Papai, Juan Zou, Aurélien Deniaud, Manikandan Karuppasamy, Qiyang Jiang, Abhishek Singha Roy, Klaus Schulten, Patrick Schultz, Juri Rappsilber, Giuseppe Zaccai, Imre Berger, Ian Collinson, Christiane Schaffitzel
The conserved SecYEG protein-conducting channel and the accessory proteins SecDF-YajC and YidC constitute the bacterial holo-translocon (HTL), capable of protein-secretion and membrane-protein insertion. By employing an integrative approach combining small-angle neutron scattering (SANS), low-resolution electron microscopy and biophysical analyses we determined the arrangement of the proteins and lipids within the super-complex. The results guided the placement of X-ray structures of individual HTL components and allowed the proposal of a model of the functional translocon...
December 7, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27924381/dual-energy-x-ray-absorptiometry-and-fracture-prediction-in-patients-with-spinal-cord-injuries-and-disorders
#3
L Abderhalden, F M Weaver, M Bethel, H Demirtas, S Burns, J Svircev, H Hoenig, K Lyles, S Miskevics, L D Carbone
: Low T-scores at the hip predict incident fractures in persons with a SCI. INTRODUCTION: Persons with a spinal cord injury (SCI) have substantial morbidity and mortality following osteoporotic fractures. The objective of this study was to determine whether dual-energy X-ray absorptiometry (DXA) measurements predict osteoporotic fractures in this population. METHODS: A retrospective historical analysis that includes patients (n = 552) with a SCI of at least 2 years duration who had a DXA performed and were in the VA Spinal Cord Disorders Registry from fiscal year (FY) 2002-2012 was performed...
December 6, 2016: Osteoporosis International
https://www.readbyqxmd.com/read/27923503/selection-of-active-phase-of-mno2-for-catalytic-ozonation-of-4-nitrophenol
#4
Faheem Nawaz, Hongbin Cao, Yongbing Xie, Jiadong Xiao, Yue Chen, Zahid Ali Ghazi
Catalytic ozonation is a highly effective method in wastewater treatment, and MnO2 materials are widely recognized as active heterogeneous catalysts in this process. Many works reported the progress in active MnO2 synthesis, but the active phase is rarely systematically studied. In this paper, all six phases of MnO2 (α-, β-, δ-, γ-, λ- and ε-) were synthesized by facile methods. Their catalytic activities in ozonation of 4-nitrophenol (4-NP) were evaluated and correlated with the physicochemical properties obtained from X-ray Diffraction (XRD), transmission electron microscopy (TEM), physical adsorption and cyclic voltammetry (CV) analysis...
December 3, 2016: Chemosphere
https://www.readbyqxmd.com/read/27923141/development-and-characterization-of-electrosprayed-alyssum-homolocarpum-seed-gum-nanoparticles-for-encapsulation-of-d-limonene
#5
Khadije Khoshakhlagh, Arash Koocheki, Mohebbat Mohebbi, Alireza Allafchian
In this study, the feasibility of developing Alyssum homolocarpum seed gum (AHSG) nanocapsules containing d-limonene by electrospraying has been investigated. d-limonene emulsions with constant AHSG (0.5% w/w) and various flavor concentrations (10-30% based on gum weight) with 0.1% Tween 20 were electrosprayed at 20kV and 0.1ml/h of flow rate. The effects of key parameters of emulsions (rheological properties, droplet size, surface tension and electrical conductivity) on the morphology of structures have been studied...
November 21, 2016: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/27922938/skeletal-muscle-mass-is-associated-with-higher-dietary-protein-intake-and-lower-body-fat-in-postmenopausal-women-a-cross-sectional-study
#6
Thaís R Silva, Poli M Spritzer
OBJECTIVE: We investigated the association between skeletal muscle mass and dietary protein intake, habitual physical activity, body composition, and metabolic variables. METHODS: One hundred three healthy postmenopausal women from southern Brazil (age 55.2 ± 4.9 y, body mass index 27.2 ± 4.6 kg/m) were enrolled. Bone mineral density, %body fat, %trunk fat mass, and appendicular lean mass were assessed by dual-energy x-ray absorptiometry, resting metabolic rate by indirect calorimetry, and habitual physical activity by pedometer...
December 5, 2016: Menopause: the Journal of the North American Menopause Society
https://www.readbyqxmd.com/read/27922877/diagnostic-accuracy-of-central-venous-catheter-confirmation-by-bedside-ultrasound-versus-chest-radiography-in-critically-ill-patients-a-systematic-review-and-meta-analysis
#7
Enyo A Ablordeppey, Anne M Drewry, Alexander B Beyer, Daniel L Theodoro, Susan A Fowler, Brian M Fuller, Christopher R Carpenter
OBJECTIVE: We performed a systematic review and meta-analysis to examine the accuracy of bedside ultrasound for confirmation of central venous catheter position and exclusion of pneumothorax compared with chest radiography. DATA SOURCES: PubMed, Embase, Cochrane Central Register of Controlled Trials, reference lists, conference proceedings and ClinicalTrials.gov. STUDY SELECTION: Articles and abstracts describing the diagnostic accuracy of bedside ultrasound compared with chest radiography for confirmation of central venous catheters in sufficient detail to reconstruct 2 × 2 contingency tables were reviewed...
December 5, 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27922833/x-ray-photoelectron-spectroscopy-and-transmission-electron-microscopy-analysis-of-silver-coated-gold-nanorods-designed-for-bionanotechnology-applications
#8
Fumiya Watanabe, Zeid A Nima, Takumi Honda, Masatoshi Mitsuhara, Minoru Nishida, Alexandru S Biris
Multicomponent nano-agents were designed and built via a core-shell approach to enhance their surface enhanced Raman scattering (SERS) signals. These nano-agents had 36 nm × 12 nm gold nanorod cores coated by 4 nm thick silver shell films and a subsequent thin bifunctional thiolated polyethylene glycol (HS-PEG-COOH) layer. Ambient time-lapsed SERS signal measurements of these functionalized nanorods taken over a two-week period indicated no signal degradation, suggesting that large portions of the silver shells remained in pure metallic form...
December 6, 2016: Nanotechnology
https://www.readbyqxmd.com/read/27922574/drop-body-syndrome-a-distinct-form-of-adult-spinal-deformity
#9
Mitsuru Yagi, Shinjiro Kaneko, Yoshiyuki Yato, Takashi Asazuma
STUDY DESIGN: A retrospective observational study. OBJECTIVE: This study examined the role of skeletal muscles in the spinal alignment of lumbar degenerative kyphosis (LDK). SUMMARY OF BACKGROUND DATA: Adult spinal deformity (ASD) may present as LDK, which is unusual in that it typically lacks any coronal deformity. METHODS: This retrospective study included 367 female ASD. Demographic and radiographic data from LDKs were compared with those with other ASD...
December 2, 2016: Spine
https://www.readbyqxmd.com/read/27921227/-nosocomial-pneumonia-from-a%C3%A2-radiological-perspective
#10
REVIEW
P Agarwal, A Wielandner
Due to the high morbidity and mortality, nosocomial pneumonia represents a serious risk in hospitalized patients. The increased risk of infections with multidrug-resistant (MDR) pathogens makes a timely diagnosis and prompt therapy indispensable. A newly occurring or progressive infiltrate in any patient who has been hospitalized for more than 48 h should be viewed with suspicion. In contrast to community acquired pneumonia (CAP), radiography plays a limited role in the diagnosis of hospital-acquired pneumonia (HAP)...
December 5, 2016: Der Radiologe
https://www.readbyqxmd.com/read/27921150/bone-mineral-density-is-decreased-in-fibromyalgia-syndrome-a-systematic-review-and-meta-analysis
#11
Sikarin Upala, Wai Chung Yong, Anawin Sanguankeo
Previous studies have shown that fibromyalgia syndrome (FMS) is associated with low level of physical activity and exercise, which may lead to an increased risk of osteoporosis. However, studies of bone mineral density (BMD) in fibromyalgia have shown conflicting results. Thus, we conducted a systematic review and meta-analysis to better characterize the association between FMS and BMD. A comprehensive search of the databases MEDLINE and EMBASE was performed from inception through May 2016. The inclusion criterion was the observational studies' assessment of the association between fibromyalgia and bone mineral density in adult subjects...
December 5, 2016: Rheumatology International
https://www.readbyqxmd.com/read/27920917/redetermination-of-metarossite-cav-5-2o6%C3%A2-2h2o
#12
Anaïs Kobsch, Robert T Downs, Kenneth J Domanik
The crystal structure of metarossite, ideally CaV2O6·2H2O [chemical name: calcium divanadium(V) hexa-oxide dihydrate], was first determined using precession photographs, with fixed isotropic displacement parameters and without locating the positions of the H atoms, leading to a reliability factor R = 0.11 [Kelsey & Barnes (1960 ▸). Can. Mineral.6, 448-466]. This communication reports a structure redetermination of this mineral on the basis of single-crystal X-ray diffraction data of a natural sample from the Blue Cap mine, San Juan County, Utah, USA (R1 = 0...
September 1, 2016: Acta Crystallographica. Section E, Crystallographic Communications
https://www.readbyqxmd.com/read/27920896/assessing-the-hyperthermic-properties-of-magnetic-heterostructures-the-case-of-gold-iron-oxide-composites
#13
Elvira Fantechi, Paula M Castillo, Erika Conca, Francesca Cugia, Claudio Sangregorio, Maria Francesca Casula
Gold-iron oxide composites were obtained by in situ reduction of an Au(III) precursor by an organic reductant (either potassium citrate or tiopronin) in a dispersion of preformed iron oxide ultrasmall magnetic (USM) nanoparticles. X-ray diffraction, transmission electron microscopy, chemical analysis and mid-infrared spectroscopy show the successful deposition of gold domains on the preformed magnetic nanoparticles, and the occurrence of either citrate or tiopronin as surface coating. The potential of the USM@Au nanoheterostructures as heat mediators for therapy through magnetic fluid hyperthermia was determined by calorimetric measurements under sample irradiation by an alternating magnetic field with intensity and frequency within the safe values for biomedical use...
December 6, 2016: Interface Focus
https://www.readbyqxmd.com/read/27920895/organosilane-functionalization-of-nanostructured-indium-tin-oxide-films
#14
R Pruna, F Palacio, M Martínez, O Blázquez, S Hernández, B Garrido, M López
Fabrication and organosilane-functionalization and characterization of nanostructured ITO electrodes are reported. Nanostructured ITO electrodes were obtained by electron beam evaporation, and a subsequent annealing treatment was selectively performed to modify their crystalline state. An increase in geometrical surface area in comparison with thin-film electrodes area was observed by atomic force microscopy, implying higher electroactive surface area for nanostructured ITO electrodes and thus higher detection levels...
December 6, 2016: Interface Focus
https://www.readbyqxmd.com/read/27920807/underdiagnosis-of-osteoporotic-vertebral-fractures-in-patients-with-fragility-fractures-retrospective-analysis-of-over-300-patients
#15
Vanna Bottai, Stefano Giannotti, Gloria Raffaetà, Maurizio Mazzantini, Francesco Casella, Gaia De Paola, Agnese Menconi, Francesca Falossi, Giulio Guido
Osteoporosis (OP) is a silent disease unless a fracture occurs; it is a major health problem, mainly due to fragility fractures, that occur at vertebral and peripheral sites. Vertebral fractures (VF) are probably the most common fragility fractures, but they go often unrecognized. The main clinical symptoms of VF are acute and chronic back pain, spinal deformity, reduced mobility and impaired quality of life. They are frequently associated with other fragility fractures. We examined 478 patients at our outpatient clinic, who were referred for fragility fracture occurrence...
May 2016: Clinical Cases in Mineral and Bone Metabolism
https://www.readbyqxmd.com/read/27919814/basil-seed-mucilage-as-a-new-source-for-electrospinning-production-and-physicochemical-characterization
#16
Forouzan Kurd, Milad Fathi, Hajar Shekarchizadeh
In this study nanofibers were prepared via the electrospinning technique by basil seed mucilage (BSM) as a new source of hydrocolloid. Polyvinyl alcohol (PVA) was used as an aiding agent. Viscosity and electrical conductivity of BSM/PVA solutions of different volume ratios (100:0, 80:20, 60:40, 40:60, 20:80 and 0:100) were in the range of 790-1300cP and 745-2140μS/cm, respectively. Morphology of nanofibers were investigated using scanning electron microscopy (SEM) that showed an average diameter range of 179-390nm...
December 2, 2016: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/27919625/an-insight-study-on-hptlc-fingerprinting-of-mukia-maderaspatana-mechanism-of-bioactive-constituents-in-metal-nanoparticle-synthesis-and-its-activity-against-human-pathogens
#17
G Karthiga Devi, K Sathish Kumar, R Parthiban, K Kalishwarlal
The present work reports the development of a Simple, rapid and eco-friendly route for the biosynthesis of gold and silver nanoparticles and their antimicrobial activity against gram positive and gram negative bacterial pathogens in the wound infected area. The synthesis was done using Mukia maderasapatna plant extract as a reducing agent. FT-IR analysis reported that the methanol extract was found to contain maximum number of functional groups which is responsible for the reduction of metal ions to metal nanoparticles...
December 2, 2016: Microbial Pathogenesis
https://www.readbyqxmd.com/read/27919518/polydopamine-decorated-3d-nickel-foam-for-extraction-of-sixteen-polycyclic-aromatic-hydrocarbons
#18
Ying Cai, Zhihong Yan, Ming Yang, Xiaoying Huang, Weiping Min, Lijia Wang, Qingyun Cai
In this work, polydopamine coated 3D nickel foam (NF-PDA) was prepared and applied as sorbent for the solid phase extraction (SPE) of 16 polycyclic aromatic hydrocarbons (PAHs) from water samples. NF-PDA were synthesized by situ oxidative self-polymerization procedure and characterized by using the techniques of scanning electron microscopy (SEM), energy dispersive spectrum analysis (EDS) and X-ray photoelectron spectroscopy (XPS). Its performance was evaluated by the SPE of 16 PAHs from water samples, followed by gas chromatography-mass spectrometrical (GC-MS) analysis...
November 21, 2016: Journal of Chromatography. A
https://www.readbyqxmd.com/read/27918632/copper-zinc-thiolate-complexes-as-potential-molecular-precursors-for-copper-zinc-tin-sulfide-czts
#19
Daniel Fuhrmann, Stefan Dietrich, Harald Krautscheid
Five copper zinc thiolate complexes [(iPr3PCu)2(ZnEt2)(edt)]2 (1-Et), [(iPr3PCu)2(Zn(iPr)2)(edt)]2 (1-iPr), [(iPr3PCu)4(edt)2(ZnMe2)]2 (2), [(iPr3PCu)3(ZnPh2)(ZnPh)(edt)2]2 (3) and [(iPr3PCu)2Zn2(edt)3]6 (4) were prepared by the reaction of [(iPr3PCu)2(edt)]2 with ZnR2 (R = Me, Et, Ph, iPr) with or without addition of ethanedithiol (edt2- = ethane-1,2-dithiolate). The molecular structures of these complexes were determined by single crystal X-ray diffraction. The ethanedithiolate ligands coordinate in µ3-eta1:eta2:eta1 (2, 4), µ4-eta1:eta1:eta2:eta1 (1-R, 3) and µ5-eta1:eta1:eta2:eta1:eta1 (2) bridging mode, each sulfur atom binds to two or three metal atoms...
December 5, 2016: Chemistry: a European Journal
https://www.readbyqxmd.com/read/27918304/new-fluorous-ponytailed-4-2-2-2-trifluoroethoxy-methyl-pyridinium-halide-salts
#20
Norman Lu, Mani Alagesan, Chi Liang Ho, Rong Jyun Wei, Chih Chieh Kung, Jung Shan Chang, Yuh Sheng Wen, Ling Kang Liu
It is possible that fluorous compounds could be utilized as directing forces in crystal engineering for applications in materials chemistry or catalysis. Although numerous fluorous compounds have been used for various applications, their structures in the solid state remains a lively matter for debate. The reaction of 4-[(2,2,2-trifluoroethoxy)methyl]pyridine with HX (X = I or Cl) yielded new fluorous ponytailed pyridinium halide salts, namely 4-[(2,2,2-trifluoroethoxy)methyl]pyridinium iodide, C8H9F3NO(+)·I(-), (1), and 4-[(2,2,2-trifluoroethoxy)methyl]pyridinium chloride, C8H9F3NO(+)·Cl(-), (2), which were characterized by IR spectroscopy, multinuclei ((1)H, (13)C and (19)F) NMR spectroscopy and single-crystal X-ray diffraction...
December 1, 2016: Acta Crystallographica. Section C, Structural Chemistry
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