Read by QxMD icon Read


Shijiao Han, Jiang Cheng, Huidong Fan, Junsheng Yu, Lu Li
High-response organic field-effect transistor (OFET)-based NO₂ sensors were fabricated using the synergistic effect the synergistic effect of zinc oxide/poly(methyl methacrylate) (ZnO/PMMA) hybrid dielectric and CuPc/Pentacene heterojunction. Compared with the OFET sensors without synergistic effect, the fabricated OFET sensors showed a remarkable shift of saturation current, field-effect mobility and threshold voltage when exposed to various concentrations of NO₂ analyte. Moreover, after being stored in atmosphere for 30 days, the variation of saturation current increased more than 10 folds at 0...
October 21, 2016: Sensors
Hugh A Smith, Curtis A Nagle, Charles A MacVean, Cindy L McKenzie
Populations of Bemisa tabaci MEAM1 were established from nineteen locations in south Florida, primarily from commercial tomato fields, and were tested using a cotton leaf petiole systemic uptake method for susceptibility to the nicotinic acetylcholine agonist insecticides imidacloprid, thiamethoxam, dinotefuran and flupyradifurone. Eleven populations produced LC50s for one or more chemicals that were not significantly different from the susceptible laboratory colony based on overlapping fiducial limits, indicating some degree of susceptibility...
October 20, 2016: Insects
Feiran Sun, Zhenguo Sun, Qiang Chen, Riichi Murayama, Hideo Nishino
To make clear the mode conversion behavior of S0-mode lamb wave and SH0-plate wave converting to the longitudinal mode guided wave and torsional mode guided wave in a pipe, respectively, the experiments were performed based on a previous built pipe inspection system. The pipe was wound with an L-shaped plate or a T-shaped plate as the waveguide, and the S0-wave and SH0-wave were excited separately in the waveguide. To carry out the objective, a meander-line coil electromagnetic acoustic transducer (EMAT) for S0-wave and a periodic permanent magnet (PPM) EMAT for SH0-wave were developed and optimized...
October 19, 2016: Sensors
Eisuke Chikayama, Ryo Yamashina, Keiko Komatsu, Yuuri Tsuboi, Kenji Sakata, Jun Kikuchi, Yasuyo Sekiyama
Foods from agriculture and fishery products are processed using various technologies. Molecular mixture analysis during food processing has the potential to help us understand the molecular mechanisms involved, thus enabling better cooking of the analyzed foods. To date, there has been no web-based tool focusing on accumulating Nuclear Magnetic Resonance (NMR) spectra from various types of food processing. Therefore, we have developed a novel web-based tool, FoodPro, that includes a food NMR spectrum database and computes covariance and correlation spectra to tasting and hardness...
October 19, 2016: Metabolites
R Rehakova, J Klimentova, M Cebova, A Barta, Z Matuskova, P Labas, O Pechanova
Deuterium-depleted water (DDW) has a lower concentration of deuterium than occurs naturally (less than 145 ppm). While effects of DDW on cancer started to be intensively studied, the effects on cardiovascular system are completely unknown. Thus, we aimed to analyze the effects of DDW (55+/-5 ppm) administration to 12-week-old normotensive Wistar-Kyoto rats (WKY) and spontaneously hypertensive rats (SHR) treated with 15 % fructose for 6 weeks. Blood pressure (BP) and selected biochemical parameters were measured together with determination of nitric oxide synthase (NOS) activity and iNOS and eNOS protein expressions in the left ventricle (LV) and aorta...
October 24, 2016: Physiological Research
Ezgi Yalçıntaş, Andreas C Scheinost, Xavier Gaona, Marcus Altmaier
The mechanisms for the reduction and uptake of Tc by magnetite (Fe3O4) and mackinawite (FeS) are investigated using X-ray absorption spectroscopy (XANES and EXAFS), in combination with thermodynamic calculations of the Tc/Fe systems and accurate characterization of the solution properties (pHm, pe, [Tc]). Batch sorption experiments were performed under strictly anoxic conditions using freshly prepared magnetite and mackinawite in 0.1 M NaCl solutions with varying initial Tc(vii) concentrations (2 × 10(-5) and 2 × 10(-4) M) and Tc loadings (400-900 ppm)...
October 24, 2016: Dalton Transactions: An International Journal of Inorganic Chemistry
Ismail Ocsoy, Nuran Isiklan, Sena Cansiz, Nalan Özdemir, Weihong Tan
Aptamer-functionalized magnetic graphene oxide conjugates loaded with indocyanine green (ICG) dye, or Apt@ICG@mGO, have been successfully developed for dual-targeted photothermal and photodynamic therapy. In general, a drug or its carrier or their dosage can be imprtant important issues in terms of toxicity. However, in this system, each component used is quite safe, biocompatibe and clean. For instance, ICG, a Food and Drug Administration (FDA) approved near-infrared (NIR) dye, serves as both a photothermal and photodynamic agent...
2016: RSC Advances
Maria Ljungberg, Marie K L Nilsson, Karin Melin, Lars Jönsson, Arvid Carlsson, Åsa Carlsson, Eva Forssell-Aronsson, Tord Ivarsson, Maria Carlsson, Göran Starck
OBJECTIVE: Obsessive-compulsive disorder (OCD) is a chronic psychiatric disorder leading to considerable distress and disability. Therapies are effective in a majority of paediatric patients, however, many only get partial response. It is therefore important to study the underlying pathophysiology of the disorder. METHODS: 1H magnetic resonance spectroscopy (MRS) was used to study the concentration of brain metabolites in four different locations (cingulate gyrus and sulcus, occipital cortex, thalamus and right caudate nucleus)...
October 24, 2016: Acta Neuropsychiatrica
Xinmin Li, Yingkai Liu, Shuanghui Li, Jieqing Huang, Yuemei Wu, Dapeng Yu
Pure SnO2 and Y-doped SnO2 nanobelts were prepared by thermal evaporation at 1350 °C in the presence of Ar carrier gas (30 sccm). The samples were characterized by scanning electron microscope (SEM), X-ray diffraction (XRD), energy dispersion spectrometer (EDS), X-ray photoelectron spectrometer (XPS), UV-Vis absorption spectroscopy, Raman spectroscopy, and Fourier transform infrared spectrum (FTIR). The sensing properties of the devices based on a single SnO2 nanobelt and Y-doped SnO2 nanobelt were explored to acetone, ethanol, and ethanediol...
December 2016: Nanoscale Research Letters
Guillermo M Wiemeyer, Miguel A Pérez, Laura Torres Bianchini, Luciano Sampietro, Guillermo F Bravo, N Luis Jácome, Vanesa Astore, Sergio A Lambertucci
Wildlife lead exposure is an increasing conservation threat that is being widely investigated. However, for some areas of the world (e.g., South America) and certain species, research on this subject is still scarce or only local information is available. We analyzed the extent and intensity of lead exposure for a widely distributed threatened species, the Andean Condor (Vultur gryphus). We conducted the study at two different scales: 1) sampling of birds received for rehabilitation or necropsy in Argentina, and 2) bibliographic review and extensive survey considering exposure event for the species' distribution in South America...
October 18, 2016: Environmental Pollution
A S M Iftekhar Uddin, Usman Yaqoob, Gwiy-Sang Chung
Herein we report an enhanced triboelectric nanogenerator (TENG) based on the contact-separation mode between a patterned film of polydimethylsiloxane (PDMS) with a semi-metallic elastomer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and a nylon fiber film. The addition of ethylene glycol to the PEDOT:PSS film improves the functionality of the TENG significantly, yielding promising applicability in both indoor and outdoor (i.e., under sunlight) environments, with the maximum instantaneous power of 0...
October 21, 2016: ACS Applied Materials & Interfaces
Fei Pan, Jian Zhang, Hao-Long Chen, Yen-Hsun Su, Yen-Hao Su, Weng-Sing Hwang
Thermodynamic calculation has been applied to predict the inclusion formation in molten SS400 steel. When the Cerium addition in liquid iron is 70 ppm and the initial Oxygen and Sulphur are both 110 ppm, the formation of oxides containing Cerium would experience the transformation from Ce2O3 to CeO2 and also the formation of sulfides containing Cerium would experience the transformation from CeS to Ce2S3 and then to Ce3S4. Below 2000 K the most thermodynamic stable matter is CeO2 and the less thermodynamic stable inclusion is CeS...
October 21, 2016: Scientific Reports
K Prasad, R R Sharma, Manish Srivastav
The present study reports the usefulness of ascorbic acid for reducing lenticels browning (LB) in mango, which impairs the cosmetic appeal and thereby the export. Postharvest dip treatment of ascorbic acid at different concentrations (100, 150 and 200 ppm) was given to four varieties of mango (Indian-'Dashehari', 'Langra'; Exotic-'Sensation', 'Eldon'). After treatment, fruits were stored at ambient conditions (35 ± 4 °C and 65 ± 5 % RH) for 10 days. At the end of storage period, observations were recorded on several parameters...
July 2016: Journal of Food Science and Technology
Sirinrat Srikulnath, Vipa Surojanametakul, Pailin Chamnansin, Hirotoshi Tamura, Masahiro Shoji
Celiac disease (CD) and gluten-related disorders are significant health and social issues in Western countries, and CD individuals need to exclude gluten from their diets. The adverse health impacts of CD have extended to Asian countries in which CD was not a problem previously. Thai commercial food products that do not contain wheat, rye, barley, or gluten on their labels were surveyed as to whether they were suitable for CD individuals by examining the absence of gluten or the presence of gluten <20 ppm...
October 19, 2016: Journal of AOAC International
Yan G Fulcher, Martial Fotso, Chee-Hoon Chang, Hans Rindt, Carol R Reinero, Steven R Van Doren
Asthma is prevalent in children and cats, and needs means of noninvasive diagnosis. We sought to distinguish noninvasively the differences in 53 cats before and soon after induction of allergic asthma, using NMR spectra of exhaled breath condensate (EBC). Statistical pattern recognition was improved considerably by preprocessing the spectra with probabilistic quotient normalization and glog transformation. Classification of the 106 preprocessed spectra by principal component analysis and partial least squares with discriminant analysis (PLS-DA) appears to be impaired by variances unrelated to eosinophilic asthma...
2016: PloS One
Da Huang, Zhi Yang, Xiaolin Li, Liling Zhang, Jing Hu, Yanjie Su, Nantao Hu, Guilin Yin, Dannong He, Yafei Zhang
Graphene is an ideal candidate for gas sensing due to its excellent conductivity and large specific surface areas. However, it usually suffers from sheet stacking, which seriously debilitates its sensing performance. Herein, we demonstrate a three-dimensional conductive network based on stacked SiO2@graphene core-shell hybrid frameworks for enhanced gas sensing. SiO2 spheres are uniformly encapsulated by graphene oxide (GO) through an electrostatic self-assembly approach to form SiO2@GO core-shell hybrid frameworks, which are reduced through thermal annealing to establish three-dimensional (3D) conductive sensing networks...
October 20, 2016: Nanoscale
Biswapriya B Misra, Zepeng Yin, Sisi Geng, Evaldo de Armas, Sixue Chen
Global CO2 level presently recorded at 400 ppm is expected to reach 550 ppm in 2050, an increment likely to impact plant growth and productivity. Using targeted LC-MS and GC-MS platforms we quantified 229 and 29 metabolites, respectively in a time-course study to reveal short-term responses to different concentrations (1, 3, and 10 mM) of bicarbonate (HCO3(-)) under light and dark conditions. Results indicate that HCO3(-) treatment responsive metabolomic changes depend on the HCO3(-) concentration, time of treatment, and light/dark...
October 20, 2016: Scientific Reports
Joaquim Suñer-Carbó, Antonio Boix-Montañés, Lyda Halbaut-Bellowa, Nelvis Velázquez-Carralero, Joanna Zamarbide-Ledesma, Nuria Bozal-de-Febrer, Ana Cristina Calpena-Campmany
Local delivery of imidazolic antifungals is limited by its extreme lipophilicity. Multiple emulsions (ME) are a potential vehicle to enhance the delivery of econazole nitrate (ECN), an antifungal targeted to deep-seated epidermal yeast infections. An 1% ECN hydrophilic ME was compared with a commercial formulation in terms of rheology, droplet size and in vitro antifungal activity against Candida species. Comparative in vitro drug release, human skin permeation and drug retention were investigated using vertical diffusion cells...
October 20, 2016: Mycoses
Sandhya, Sandeep Kumar, Dinesh Kumar, Neeraj Dilbaghi
Synthesis and controlled release study of polymeric nanoformulation of carbendazim (2-benzimidazole carbamic acid methyl ester) using chitosan and pectin is reported in this article. The formulation was subjected to morphological, physiological, in vitro fungicide release and bio-efficacy evaluation studies. The average size of nanoparticles was found to be in the range of 70-90 nm as confirmed by transmission electron microscopy. The in vitro fungicide release of nanoformulated carbendazim was compared with pure carbendazim at different pH values...
October 19, 2016: Environmental Science and Pollution Research International
BongKyoo Choi, SangJun Choi, JeeYeon Jeong, JiWon Lee, Shi Shu, Nu Yu, SangBaek Ko, Yifang Zhu
BACKGROUND: Few studies have examined ambulatory cardiovascular physiological parameters of taxi drivers while driving in relation to their occupational hazards. This study aims to investigate and quantify the impact of worksite physical hazards as a whole on ambulatory heart rate of professional taxi drivers while driving without their typical worksite psychosocial stressors. METHODS: Ambulatory heart rate (HRdriving) of 13 non-smoking male taxi drivers (24 to 67 years old) while driving was continuously assessed on their 6-hour experimental on-road driving in Los Angeles...
2016: Annals of Occupational and Environmental Medicine
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"