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https://www.readbyqxmd.com/read/28731680/nitrilotriacetic-amine-functionalized-polymeric-core-shell-nanoparticles-as-enzyme-immobilization-supports
#1
Dominic Keller, Ana Beloqui, Monica Martínez-Martínez, Manuel Ferrer, Guillaume Delaittre
Nitrilotriacetic amine (NTA) functionalized nanoparticles obtained by aqueous polymerization-induced self-assembly (PISA) are introduced as immobilization supports for polyhistidine-functionalized (His-tagged) enzymes. A novel initiator for nitroxide-mediated polymerization based on the nitroxide SG1 and carrying a protected NTA moiety was first synthesized. Size-exclusion chromatography (SEC) and electrospray ionization mass spectrometry (ESI-MS) proved the ability of this initiator to produce well-defined end-functional vinyl polymers...
July 21, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28730643/differences-in-gadolinium-retention-after-repeated-injections-of-macrocyclic-mr-contrast-agents-to-rats
#2
Simona Bussi, Alessandra Coppo, Catherine Botteron, Valérie Fraimbault, Antonello Fanizzi, Elisa De Laurentiis, Sonia Colombo Serra, Miles A Kirchin, Fabio Tedoldi, Federico Maisano
PURPOSE: To compare the levels of gadolinium in the blood, cerebrum, cerebellum, liver, femur, kidneys, and skin after multiple exposure of rats to the macrocyclic gadolinium-based contrast agents (GBCAs) gadoterate, gadobutrol, and gadoteridol. MATERIALS AND METHODS: Fifty male Wistar Han rats were randomized to three exposure groups (n = 15 per group) and one control group (n = 5). Animals in the exposure groups received a total of 20 GBCA administrations (four administrations per week for 5 consecutive weeks) at a dose of 0...
July 21, 2017: Journal of Magnetic Resonance Imaging: JMRI
https://www.readbyqxmd.com/read/28729952/nano-sized-zeolites-as-modulators-of-thiacloprid-toxicity-on-chironomus-riparius
#3
Carla S Lorenz, Anna-Jorina Wicht, Leyla Guluzada, Barbara Crone, Uwe Karst, Hwa Jun Lee, Rita Triebskorn, Stefan B Haderlein, Carolin Huhn, Heinz-R Köhler
This study investigated whether zeolites of different size (Y30 (nano-sized) and H-Beta(OH)-III (forming large aggregates/agglomerates composed of 50 nm small primary particles)) exerted acute toxicity on larvae of the non-biting midge, Chironomus riparius, and whether such zeolites are able to modulate the toxicity of a common insecticide, thiacloprid, by means of adsorption of a dissolved toxicant. We conducted acute toxicity tests with fourth instar larvae of C. riparius. In these tests, larvae were exposed to zeolites or thiacloprid solely, or to mixtures of both compounds...
2017: PeerJ
https://www.readbyqxmd.com/read/28728141/estimates-of-soil-ingestion-in-a-population-of-chinese-children
#4
Chunye Lin, Beibei Wang, Xiaoyong Cui, Dongqun Xu, Hongguang Cheng, Qin Wang, Jin Ma, Tuanyao Chai, Xiaoli Duan, Xitao Liu, Junwei Ma, Xuan Zhang, Yanzhong Liu
BACKGROUND: China's soil pollution poses serious health risks. However, data regarding the soil ingestion rate (SIR) of the Chinese population, which is critical to assessing associated health risks, are lacking. OBJECTIVES: We estimated soil ingestion of 177 Chinese children from Guangdong, Hubei, and Gansu Provinces. METHODS: We conducted this investigation by employing a tracer mass-balance method. We collected a duplicate of all food consumed and all feces and urine excreted on 1 d () and over 3 consecutive d (), as well as soil samples from play areas and drinking-water samples...
July 5, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28727580/increase-in-intracranial-pressure-by-application-of-a-rigid-cervical-collar-a-pilot-study-in-healthy-volunteers
#5
Iscander M Maissan, Rein Ketelaars, Boris Vlottes, Sanne E Hoeks, Dennis den Hartog, Robert J Stolker
OBJECTIVES: Rigid cervical collars are known to increase intracranial pressure (ICP) in severe traumatic brain injury (TBI). Cerebral blood flow might decrease according to the Kellie Monroe doctrine. For this reason, the use of the collar in patients with severe TBI has been abandoned from several trauma protocols in the Netherlands. There is no evidence on the effect of a rigid collar on ICP in patients with mild or moderate TBI or indeed patients with no TBI. As a first step we tested the effect in healthy volunteers with normal ICPs and intact autoregulation of the brain...
July 19, 2017: European Journal of Emergency Medicine: Official Journal of the European Society for Emergency Medicine
https://www.readbyqxmd.com/read/28727321/micelle-directing-synthesis-of-the-ag-doped-wo3-and-moo3-composite-for-the-photocatalytic-water-oxidation-and-organic-dyes-adsorption
#6
Nasen Bate, Hongfei Shi, Li Chen, Jiabo Wang, Shasha Xu, Weilin Chen, Jianping Li, En-Bo Wang
In this paper, Ag-doped WO3 (MoO3) composite has been prepared by a simple micelle directed method and high temperature sintering route. The as-prepared samples were characterized by XRD, ICP, TEM, XPS, DRS, BET, PL and EIS techniques. The photocatalytic experiments reveal that their oxygen production rates are up to 95.43 μmol (75.45 μmol) for Ag-doped WO3 (MoO3), which is 9.5 (7.3) times higher than that of pure WO3: 9.012 μmol (MoO3: 9.00 μmol) under visible light illumination (λ ≥ 420 nm), respectively...
July 20, 2017: Chemistry, An Asian Journal
https://www.readbyqxmd.com/read/28727246/recognition-and-extraction-of-cesium-hydroxide-and-carbonate-using-a-neutral-multitopic-ion-pair-receptor
#7
Qing He, Gretchen Marie Peters, Vincent M Lynch, Jonathan L Sessler
Current approaches to lowering the pH of basic media rely on the addition of a proton source. An alternative approach is described here that involves the liquid-liquid extraction-based removal of cesium salts, specifically CsOH and Cs2CO3, from highly basic media. A multitopic ion-pair receptor (2) is used that can recognize and extract the hydroxide and carbonate anions as their cesium salts, as confirmed by 1H NMR spectroscopic titrations, ICP-MS, single-crystal structural analyses and theoretical calculations...
July 20, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28726968/evaluation-of-spectral-photon-counting-computed-tomography-k-edge-imaging-for-determination-of-gold-nanoparticle-biodistribution-in-vivo
#8
Salim Si-Mohamed, David P Cormode, Daniel Bar-Ness, Monica Sigovan, Pratap C Naha, Jean-Baptiste Langlois, Lara Chalabreysse, Philippe Coulon, Ira Blevis, Ewald Roessl, Klaus Erhard, Loic Boussel, Philippe Douek
Spectral photon counting computed tomography (SPCCT) is an emerging medical imaging technology. SPCCT scanners record the energy of incident photons, which allows specific detection of contrast agents due to measurement of their characteristic X-ray attenuation profiles. This approach is known as K-edge imaging. Nanoparticles formed from elements such as gold, bismuth or ytterbium have been reported as potential contrast agents for SPCCT imaging. Furthermore, gold nanoparticles have many applications in medicine, such as adjuvants for radiotherapy and photothermal ablation...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28726964/a-%C3%AE-galactosidase-probe-for-the-detection-of-cellular-senescence-by-mass-cytometry
#9
M A Lumba, L M Willis, S Santra, R Rana, L Schito, S Rey, B G Wouters, M Nitz
Mass cytometry (MC) is a powerful method that combines the cellular resolution of flow cytometry with the isotopic resolution of inductively coupled plasma mass spectrometry (ICP-MS). This combination theoretically allows for the simultaneous quantification of >80 different parameters at the single cell level, in turn allowing for the deep profiling of heterogeneous cell populations. The majority of available reagents for MC are antibodies labeled with heavy metal isotopes, allowing for the quantification of static biomarkers...
July 20, 2017: Organic & Biomolecular Chemistry
https://www.readbyqxmd.com/read/28726692/chemical-speciation-of-trace-metals-in-the-industrial-sludge-of-dhaka-city-bangladesh
#10
Md Saiful Islam, Md Habibullah Al-Mamun, Ye Feng, Masahiro Tokumura, Shigeki Masunaga
The objective of this study was to assess total concentration and chemical fractionation of trace metals in the industrial wastewater and sludge collected from seven different types of industries in Dhaka City, Bangladesh. The sludge from industries is either dumped on landfills or reused as secondary resources in order to preserve natural resources. Metals were analyzed using inductively coupled plasma mass spectrometry (ICP-MS). The ranges of Cr, Ni, Cu, As, Cd, and Pb in the sludges were 1.4-9,470, 4.8-994, 12...
July 2017: Water Science and Technology: a Journal of the International Association on Water Pollution Research
https://www.readbyqxmd.com/read/28726590/a-method-of-managing-severe-traumatic-brain-injury-in-the-absence-of-intracranial-pressure-monitoring-the-ice-protocol
#11
Randall Chesnut, Nancy Temkin, Sureyya Dikmen, Carlos Rondina, Walter Videtta, Gustavo Petroni, Silvia Lujan, Victor Alanis, Antonio Luis Eiras Falcao, Gustavo La Fuente, Luis Gonzalez, Manuel Jibaja, Arturo Lavendez, Freddy Sandi Lora, Roberto Merida, Ricardo Romero, James Pridgeon, Jason Barber, Joan Machamer, Kelley Chaddock
Purpose - The imaging- and clinical-examination (ICE) algorithm used in the BEST TRIP ICP randomized controlled trial is the only prospectively investigated clinical protocol for TBI management without ICP monitoring. As the default literature standard, it warrants careful evaluation. Methods - We present the ICE protocol in detail and analyse the demographics, outcome, treatment intensity, frequency of intervention usage, and related adverse events in the ICE-protocol cohort. Results - The 167 ICE protocol patients were young (median 29 years) with a median Glasgow Coma Scale motor score of 4 but with anisocoria or abnormal pupillary reactivity in 40%...
July 20, 2017: Journal of Neurotrauma
https://www.readbyqxmd.com/read/28726376/dentritic-cuptpd-catalyst-for-enhanced-electrochemical-oxidation-of-methanol
#12
Xiaoqin Shi, Ying Wen, Xiaoyu Guo, Yuxia Pan, Yuanyuan Ji, Ye Ying, Hai-Feng Yang
The CuPtPd catalyst is designed and synthesized successfully via directly reducing metal ions. The composition, morphology and structure of the as-prepared CuPtPd nanohybrids are characterized by scanning electron microscope (SEM) and transmission electron microscopy (TEM), energy-dispersive spectrometer (EDS), selected-area electron diffraction (SAED), X-ray diffraction (XRD), and inductively coupled plasma atomic emission spectrometry (ICP-AES). By comparison of the electrocatalytic properties of the ternary CuPtPd catalyst with bimetallic catalysts, we find that ternary nanocomposites perform better electrocatalytic and anti-poisoning activity towards oxidation of methanol...
July 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28726294/screening-and-structural-and-functional-investigation-of-a-novel-ferritin-from-phascolosoma-esculenta
#13
Hongwei Ding, Dijun Zhang, Shuangshuang Chu, Jun Zhou, Xiurong Su
Ferritins are primary iron storage proteins and play a crucial role in iron storage and detoxification. Yeast two-hybrid method was employed to screen the cDNA library of Phascolosoma esculenta. Sequence of positive colony FER147 was analyzed. The higher similarity and conserved motifs for ferritin indicated that it belonged to a new member of ferritin family. The interaction between Ferritin and Fer147 was further confirmed through co-immunoprecipitation. The pET-28a-FER147 prokaryotic expression vector was constructed...
July 20, 2017: Protein Science: a Publication of the Protein Society
https://www.readbyqxmd.com/read/28726073/investigation-of-heavy-metal-level-and-mineral-nutrient-status-in-widely-used-medicinal-plants-leaves-in-turkey-insights-into-health-implications
#14
Ibrahim Ilker Ozyigit, Bahattin Yalcin, Senay Turan, Ibrahim Adnan Saracoglu, Sedat Karadeniz, Ibrahim Ertugrul Yalcin, Goksel Demir
The use of plants in treatments has been as old as humanity and it has preserved its popularity for centuries til now because of their availability, affordability and safeness. However, despite their widespread use, safety and quality issues have been major concerns in the world due to industrial- and anthropogenic-based heavy metal contamination risks. Thus, this study was attempted to analyze the heavy metal levels and mineral nutrient status of widely used medicinal plants in Turkey to have insights about their health implications on humans...
July 19, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28725152/analysis-of-inorganic-and-organic-constituents-of-myrrh-resin-by-gc-ms-and-icp-ms-an-emphasis-on-medicinal-assets
#15
Syed Rizwan Ahamad, Abdul Rahman Al-Ghadeer, Raisuddin Ali, Wajhul Qamar, Suliman Aljarboa
The aim of the present investigation was to explore the constituents of the Arabian myrrh resin obtained from Commiphora myrrha. The organic and inorganic composition of the myrrh gum resin has been investigated using gas chromatography-mass spectrometry (GC-MS) and inductively coupled plasma-mass spectrometry (ICP-MS). Analysis executed by ICP-MS reveals the presence of various inorganic elements in significant amount in the myrrh resin. The elements that were found to be present in large amounts include calcium, magnesium, aluminum, phosphorus, chlorine, chromium, bromine and scandium...
July 2017: Saudi Pharmaceutical Journal: SPJ: the Official Publication of the Saudi Pharmaceutical Society
https://www.readbyqxmd.com/read/28723097/decorating-of-ag-and-cuo-on-cu-nanoparticles-for-the-enhanced-high-catalytic-activity-to-the-degradation-of-organic-pollutants
#16
Yu Liang, Zhe Chen, Wen Yao, Pengyi Wang, Shujun Yu, Xiangke Wang
The metal/semiconductor composites are promising catalysts with superior catalytic activity. In this work, a Cu/CuO-Ag composite with structure that Ag and CuO nanoparticles (NPs) decorated on the surface of Cu were fabricated via a facile in-situ method. With the characterization by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), energy dispersive X-ray spectroscopy (EDX) and inductively coupled plasma atomic emission spectrometry (ICP-AES), the structure and structure and component of Cu/CuO-Ag composite were well-defined...
July 19, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28717240/elemental-compositions-of-lichens-from-duolun-county-inner-mongolia-china-origin-road-effect-and-species-difference
#17
Hua-Jie Liu, Jing-Gong Wang, Yu Xia, Meng-Jie Yang, Si-Wa Liu, Liang-Cheng Zhao, Xiu-Ping Guo, Yun-Jun Jiang, Xin Li, Qing-Feng Wu, Shi-Bo Fang
To assess the response of lichen elemental compositions to road traffic and species difference in the context of high dust input and anthropogenic emissions, two foliose epiphytic lichens (Phaeophyscia hirtuosa, PHh; Candelaria fibrosa, CAf) were sampled near a road adjacent to Dolon Nor Town (Duolun County, Inner Mongolia, China). Twenty elements (Ba, Ca, Cd, Co, Cr, Cu, Fe, K, Mg, Mn, Mo, Na, Ni, P, Pb, Sb, Sr, Ti, V and Zn) in lichen and surface soil samples were analysed using inductively coupled plasma mass spectrometer (ICP-MS)...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716715/functional-parcellation-using-time-courses-of-instantaneous-connectivity
#18
REVIEW
Erik S B van Oort, Maarten Mennes, Tobias Navarro Schröder, Vinod J Kumar, Nestor I Zaragoza Jimenez, Wolfgang Grodd, Christian F Doeller, Christian F Beckmann
Functional neuroimaging studies have led to understanding the brain as a collection of spatially segregated functional networks. It is thought that each of these networks is in turn composed of a set of distinct sub-regions that together support each network's function. Considering the sub-regions to be an essential part of the brain's functional architecture, several strategies have been put forward that aim at identifying the functional sub-units of the brain by means of functional parcellations. Current parcellation strategies typically employ a bottom-up strategy, creating a parcellation by clustering smaller units...
July 14, 2017: NeuroImage
https://www.readbyqxmd.com/read/28715784/elemental-content-of-the-placenta-a-comparison-between-two-high-risk-obstetrical-populations-adult-women-carrying-multiples-and-adolescents-carrying-singletons
#19
Paolo de Angelis, Richard K Miller, Thomas H Darrah, Philip J Katzman, Eva K Pressman, Tera R Kent, Kimberly O O'Brien
BACKGROUND: The placenta is responsible for the exchange of nutrients and for preventing harmful compounds from entering the fetal circulation. With increasing industrialization, exposures to commercial and toxic metals become a concern for both pregnant women and those planning a pregnancy. The understanding of transport mechanisms and pharmacokinetics for most inorganic elements is incomplete and limited to normal term deliveries. OBJECTIVES: To obtain novel data on 46 inorganic elements in placentae from two high-risk obstetric populations, women carrying multiples and adolescents carrying singletons, evaluating differences, if present, and identifying predictors of placental content...
July 14, 2017: Environmental Research
https://www.readbyqxmd.com/read/28715363/decompressive-craniectomy-vs-craniotomy-only-for-intracranial-hemorrhage-evacuation-a-propensity-matched-study
#20
Faisal Jehan, Asad Azim, Peter Rhee, Muhammad Khan, Lynn Gries, Terence OʼKeeffe, Narong Kulvatunyou, Andrew Tang, Bellal Joseph
BACKGROUND: Decompressive craniectomy (DC) is often performed in conjunction with evacuation of intracranial hemorrhage (ICH) to control intracranial pressure (ICP) in patients with a traumatic brain injury (TBI). The efficacy of DC in lowering ICP is well established, however, its effect on clinical outcomes remains controversial. The aim of our study is to assess outcomes in TBI patients undergoing decompressive craniectomy (DC) vs. craniotomy only (CO) for the evacuation of intracranial hemorrhage...
July 15, 2017: Journal of Trauma and Acute Care Surgery
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