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https://www.readbyqxmd.com/read/28735402/determination-of-total-sulfur-sulfate-sulfite-thiosulfate-and-sulfolipids-in-plants
#1
Assylay Kurmanbayeva, Galina Brychkova, Aizat Bekturova, Inna Khozin, Dominic Standing, Dmitry Yarmolinsky, Moshe Sagi
In response to oxidative stress the biosynthesis of the ROS scavenger, glutathione is induced. This requires the induction of the sulfate reduction pathway for an adequate supply of cysteine, the precursor for glutathione. Cysteine also acts as the sulfur donor for the sulfuration of the molybdenum cofactor, crucial for the last step of ABA biosynthesis. Sulfate and sulfite are, respectively, the precursor and intermediate for cysteine biosynthesis and there is evidence for stress-induced sulfate uptake and further downstream, enhanced sulfite generation by 5'-phosphosulfate (APS) reductase (APR, EC 1...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28734363/multi-energy-calibration-applied-to-atomic-spectrometry
#2
Alex Virgilio, Daniel A Gonçalves, Tina McSweeney, José A Gomes Neto, Joaquim A Nóbrega, George L Donati
Multi-energy calibration (MEC) is a novel strategy that explores the capacity of several analytes of generating analytical signals at many different wavelengths (transition energies). Contrasting with traditional methods, which employ a fixed transition energy and different analyte concentrations to build a calibration plot, MEC uses a fixed analyte concentration and multiple transition energies for calibration. Only two calibration solutions are required in combination with the MEC method. Solution 1 is composed of 50% v v(-1) sample and 50% v v(-1) of a standard solution containing the analytes...
August 22, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28734042/multivariate-optimization-of-conditions-for-digestion-of-wet-feeds-for-dogs-and-cats-using-a-closed-digester-block-and-multielement-determination-by-icp-oes
#3
Dayara Virgínia Lino Ávila, Sidnei Oliveira Souza, Silvlvânio Silvlvério Lopes Costa, Carlos Alexandre Borges Garcia, José do Patrocínio Hora Alvlves, Rennan Geovanny Oliveira Araujo, Elisangela Andrade Passos
A full 2⁴ factorial design was applied to find the best combination of diluted reagents (HNO₃ and H₂O₂), time, and temperature for the digestion of samples of wet feed for dogs and cats using a closed digestion block. The residual carbon concentration (RCC) was used as the response in the factorial design. All variables and their interactions significantly influenced the digestion of the feed samples, as indicated by the RCC. The conditions established for the digestion of 0.05 g (dry mass) wet feed samples were the addition of 3...
July 21, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28733756/glial-and-neuronal-antibodies-in-patients-with-idiopathic-intracranial-hypertension
#4
Güneş Altıokka-Uzun, Ece Erdağ, Betül Baykan, John Tzartos, Duygu Gezen-Ak, Bedia Samancı, Erdinç Dursun, Paraskevi Zisimopoulou, Katerina Karagiorgou, Christos Stergiou, Erdi Şahin, Esme Ekizoğlu, Murat Kürtüncü, Erdem Tüzün
Headache and visual disturbances are the main presenting symptoms of idiopathic intracranial hypertension (IIH) characterized by increased intracranial pressure (ICP) with an unknown cause. We aimed to investigate the antibodies against optic neuritis-associated glial antigens, aquaporin-4 (AQP4) and myelin oligodendrocyte glycoprotein (MOG) and uncharacterized neuronal membrane antigens in IIH patients. Consecutive patients diagnosed according to Friedman revised diagnostic criteria and control subjects were included after their consent...
July 21, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28733233/estimation-of-dietary-intake-and-target-hazard-quotients-for-metals-by-consumption-of-wines-from-the-canary-islands
#5
Angel J Gutiérrez, Carmen Rubio, Isabel M Moreno, A Gustavo González, Dailos Gonzalez-Weller, Naouel Bencharki, Arturo Hardisson, Consuelo Revert
This paper describes the impact of mineral content on wines and assesses the potential health risk from consuming these wines from Canary Islands. The metal content (B, Ca, Co, Cr, Cu, Fe, K, Li, Mg, Mn, Mo, Na, Ni, Pb, Zn) of red wines belonging to different regions in the Canary Islands was determined by ICP-OES. The studied wine regions were Valle de la Orotava, Tacoronte-Acentejo, Ycoden-Daute-Isora, Abona and Valle de Güimar in Tenerife Island and only one in La Gomera and La Palma Islands. According to the content found, elements could be classified in two categories: the main group including Ca, K, Mg, Na, and the ''minor'' set consisting of B, Co, Cr, Cu, Fe, Li, Mn, Mo, Ni, Pb and Zn...
July 18, 2017: Food and Chemical Toxicology
https://www.readbyqxmd.com/read/28731680/nitrilotriacetic-amine-functionalized-polymeric-core-shell-nanoparticles-as-enzyme-immobilization-supports
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
#13
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
#14
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
#15
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
#16
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
#17
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
#18
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
#19
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
#20
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
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