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https://www.readbyqxmd.com/read/28441356/a-simple-cost-effective-sensor-for-detecting-lead-ions-in-water-using-under-potential-deposited-bismuth-sub-layer-with-differential-pulse-voltammetry-dpv
#1
Yifan Dai, Chung Chiun Liu
This research has developed a simple to use, cost effective sensor system for the detection of lead ions in tap water. An under-potential deposited bismuth sub-layer on a thin gold film based electrochemical sensor was designed, manufactured, and evaluated. Differential pulse voltammetry (DPV) measurement technique was employed in this detection. Tap water from the Cleveland, OH, USA regional water district was the test medium. Concentrations of lead ion in the range of 8 × 10(-7) M to 5 × 10(-4) M were evaluated, showing a good sensitivity over this concentration range...
April 25, 2017: Sensors
https://www.readbyqxmd.com/read/28439578/long-term-bond-strength-of-self-etch-adhesives-to-normal-and-artificially-eroded-dentin-effect-of-relative-humidity-and-saliva-contamination
#2
Fabienne Amsler, Anne Peutzfeldt, Adrian Lussi, Simon Flury
PURPOSE: To investigate the effect of relative humidity and saliva contamination on short- and long-term bond strength of two self-etch adhesives to normal and artificially eroded dentin. MATERIALS AND METHODS: A total of 480 dentin specimens were produced from extracted human molars. Half of the specimens (n = 240) were left untreated (normal dentin) whereas the other half (n = 240) were artificially eroded. The specimens were treated with Clearfil SE Bond (CSE) or Scotchbond Universal (SBU), and composite (Filtek Z250) was applied to the treated dentin surface under four experimental conditions: at a relative humidity of 45% or 85% without/with human saliva contamination...
April 21, 2017: Journal of Adhesive Dentistry
https://www.readbyqxmd.com/read/28439277/expression-of-pennisetum-glaucum-eukaryotic-translational-initiation-factor-4a-pgeif4a-confers-improved-drought-salinity-and-oxidative-stress-tolerance-in-groundnut
#3
Tata Santosh Rama Bhadra Rao, Juturu Vijaya Naresh, Palakolanu Sudhakar Reddy, Malireddy K Reddy, Garladinne Mallikarjuna
Eukaryotic translational initiation factor 4A belong to family of helicases, involved in multifunctional activities during stress and non-stress conditions. The eIF4A gene was isolated and cloned from semi-arid cereal crop of Pennisetum glaucum. In present study, the PgeIF4A gene was expressed under the regulation of stress inducible Arabidopsis rd29A promoter in groundnut (cv JL-24) with bar as a selectable marker. The de-embryonated cotyledons were infected with Agrobacterium tumefaciens (LBA4404) carrying rd29A:PgeIF4A construct and generated high frequency of multiple shoots in phosphinothricin medium...
2017: Frontiers in Plant Science
https://www.readbyqxmd.com/read/28437999/novel-programmable-microwave-photonic-filter-with-arbitrary-filtering-shape-and-linear-phase
#4
Xiaoqi Zhu, Feiya Chen, Huanfa Peng, Zhangyuan Chen
We propose and demonstrate a novel optical frequency comb (OFC) based microwave photonic filter which is able to realize arbitrary filtering shape with linear phase response. The shape of filter response is software programmable using finite impulse response (FIR) filter design method. By shaping the OFC spectrum using a programmable waveshaper, we can realize designed amplitude of FIR taps. Positive and negative sign of FIR taps are achieved by balanced photo-detection. The double sideband (DSB) modulation and symmetric distribution of filter taps are used to maintain the linear phase condition...
April 17, 2017: Optics Express
https://www.readbyqxmd.com/read/28435366/comparative-evaluation-of-antimicrobial-efficacy-of-triple-antibiotic-paste-calcium-hydroxide-and-a-proton-pump-inhibitor-against-resistant-root-canal-pathogens
#5
Shibha Mehta, Promila Verma, Aseem Prakash Tikku, Anil Chandra, Rhythm Bains, Gopa Banerjee
OBJECTIVE: The objective of this study is to compare the antimicrobial efficacy of triple antibiotic paste (TAP) and a proton pump inhibitor (PPI) (omeprazole) in combination with calcium hydroxide (CH) against Enterococcus faecalis and Candida albicans. MATERIALS AND METHODS: E. faecalis and C. albicans were subcultured and inoculated at 37° overnight and were treated with different dilutions of TAP, 25 μg/ml (Group 1), CH (Group 2, control), CH 16 mg/ml + omeprazole 2 mg/ml (Group 3a) (CH 16 mg/ml + omeprazole 4 mg)/ml (Group 3b) for 24, 48, and 72 h in sterile uncoated 96-well microtiter plates...
January 2017: European Journal of Dentistry
https://www.readbyqxmd.com/read/28435045/current-direction-dependent-modulation-of-human-hand-motor-function-by-intermittent-theta-burst-stimulation-itbs
#6
Yuichiro Shirota, Suman Dhaka, Walter Paulus, Martin Sommer
BACKGROUND: Transcranial magnetic stimulation (TMS) with different current directions can activate different sets of neurons. Current direction can also affect the results of repetitive TMS. OBJECTIVE: To test the influence of uni-directional intermittent theta burst stimulation (iTBS) using different current directions, namely posteroanterior (PA) and anteroposterior (AP), on motor behaviour. METHODS: In a cross-over design, PA- and AP-iTBS was applied over the left primary motor cortex in 19 healthy, right-handed volunteers...
April 20, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28434758/mallards-anas-platyrhynchos-and-wastewater-ponds-part-ii-developmental-physiological-morphological-and-behavioural-effects-of-ingestion-of-secondary-clarified-effluent-water
#7
K B Tierney, P O Welsh, M Mills, S Nason, D R Barreda, C A Paszkowski
Rather than migrating, mallard ducks may choose to overwinter in northern cities on open-water thermal refuges, such as municipal wastewater treatment ponds, which in Edmonton, Canada, stay ≥10°C during frigid winter months. Refuging mallards spend appreciable time daily on these ponds and hydrate using secondary clarified municipal wastewater (SCEW). We aimed to determine if SCEW ingestion affected mallard health. To this end, we gavaged newly hatched mallards (domesticated Pekin strain) over their first month with SCEW, as well as water representing negative and positive controls (municipal tap water, and the primary active ingredient from birth control pills, 17α-ethinyl estradiol (EE2), respectively)...
April 20, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28433556/bolus-injections-of-novel-thrombogenic-site-targeted-fusion-proteins-comprising-annexin-v-and-kunitz-protease-inhibitors-attenuate-intimal-hyperplasia-after-balloon-angioplasty
#8
Yung-Hsin Yeh, Shang-Hung Chang, Shin-Yu Chen, Chih-Jen Wen, Fu-Chan Wei, Rui Tang, Sam Achilefu, Tze-Chein Wun, Wei-Jan Chen
BACKGROUND: Systemic administrations of conventional antithrombotics reduce neointima formation after angioplasty in experimental animals. However, clinical translation of these results has not been successful due to high risk for bleeding. OBJECTIVES: We sought to determine whether novel annexin-V (ANV)-Kunitz protease inhibitor fusion proteins, TAP-ANV and ANV-6L15, can specifically target to vascular injury site and limit neointima formation without inducing systemic hypo-coagulation in a rat carotid artery balloon angioplasty injury model...
April 6, 2017: International Journal of Cardiology
https://www.readbyqxmd.com/read/28432888/removal-of-arsenate-and-dichromate-ions-from-different-aqueous-media-by-amine-based-p-taea-co-gde-microgels
#9
Saif Ur Rehman, Abdur Rahman Khan, Mehtap Sahiner, Sultan B Sengel, Nahit Aktas, Muhammad Siddiq, Nurettin Sahiner
In this work, microgels based on tris(2-aminoethyl) amine (TAEA) and glycerol diglycidyl ether (GDE) via simple microemulsion polymerization was prepared as p(TAEA-co-GDE) microgels were used as adsorbent for removal of dichromate (Cr (VI)) and arsenate (As (V)) ions from different aqueous environments. The p(TAEA-co-GDE) microgels were demonstrated very efficient adsorption capacity for Cr (VI), and As (V) that are 164.98 mg/g, and 123.64 mg/g from distilled (DI) water, respectively. The effect of the medium pH on the adsorption capacity of p(TAEA-co-GDE) microgels for Cr (VI) and As (V) ions were investigated...
April 19, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28432631/coumarin-based-fluorescent-probe-for-hypochlorites-and-real-application-in-tap-water
#10
Xiaohong Cheng, Shaohua Qu, Zhicheng Zhong, Wangnan Li
Taking advantages of both the oxidation property of hypochlorite and different coordination properties of Cu(+) and Cu(2+) ions, we developed a new fluorescent probe for hypochlorite anion, namely, compound C1. In the presence of ClO(-), the sensing system displayed extraordinary fluorescence quenching, which was beneficial to the production of a high signal output during detection process. By virtue of its special oxidation property, the probe displayed high selectivity for ClO(-) over other anions. Moreover, this novel sensing system could be used for the analysis of ClO(-) levels in tap water and potentially in environmental samples...
April 21, 2017: Journal of Fluorescence
https://www.readbyqxmd.com/read/28432516/the-tower-of-london-tol-in-italy-standardization-of-the-tol-test-in-an-italian-population
#11
Maddalena Boccia, Dario Marin, Giovanni D'Antuono, Paola Ciurli, Chiara Incoccia, Gabriella Antonucci, Cecilia Guariglia, Laura Piccardi
Deficit in planning and problem-solving, affecting a wide range of neuropsychological patients, has been widely investigated using the Tower of London (ToL) test, as developed by Shallice (Philos Trans R Soc Lond Ser B Biol Sci 298:199-209, 1). The ToL taps on several executive functions (EF), such as planning, time for planning or rule breaks, which may be usefully indexed by different ToL measurements. However, in its original version, the different aspects involved in ToL are not evaluated in a specific way...
April 21, 2017: Neurological Sciences
https://www.readbyqxmd.com/read/28432439/characterization-of-a-functional-recombinant-human-creatine-kinase-mb-isoenzyme-prepared-by-tandem-affinity-purification-from-escherichia-coli
#12
Lihui Zou, Wen Su, Meng Wang, Wei Huang, Haijian Zhao, Enyi Zhang, Junhua Jin, Hongtao Xu, Fei Xiao
Creatine kinase isoform CK-MB has been widely applied as a biomarker of myocardial injury. While a variety of methods have been used to measure CK-MB activity or mass in clinical laboratories, a CK-MB standard is needed to eliminate between-method bias. Because the in vitro expression of human creatine kinase generates three isoenzymes, CK-MM, CK-MB, and CK-BB, it is important to establish an effective method to purify the isoform CK-MB from the mixture. In this study, we aimed at using tandem affinity purification (TAP) to purify recombinant CK-MB protein and evaluate its value in clinical laboratories...
April 21, 2017: Applied Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28429773/evaluation-of-the-precision-of-contrast-sensitivity-function-assessment-on-a-tablet-device
#13
Michael Dorr, Luis A Lesmes, Tobias Elze, Hui Wang, Zhong-Lin Lu, Peter J Bex
The contrast sensitivity function (CSF) relates the visibility of a spatial pattern to both its size and contrast, and is therefore a more comprehensive assessment of visual function than acuity, which only determines the smallest resolvable pattern size. Because of the additional dimension of contrast, estimating the CSF can be more time-consuming. Here, we compare two methods for rapid assessment of the CSF that were implemented on a tablet device. For a single-trial assessment, we asked 63 myopes and 38 emmetropes to tap the peak of a "sweep grating" on the tablet's touch screen...
April 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28427890/attentive-pointing-in-natural-scenes-correlates-with-other-measures-of-attention
#14
Daniel M Jeck, Michael Qin, Howard Egeth, Ernst Niebur
Finger pointing is a natural human behavior frequently used to draw attention to specific parts of sensory input. Since this pointing behavior is likely preceded and/or accompanied by the deployment of attention by the pointing person, we hypothesize that pointing can be used as a natural means of providing self-reports of attention and, in the case of visual input, visual salience. We here introduce a new method for assessing attentional choice by asking subjects to point to and tap the first place they look at on an image appearing on an electronic tablet screen...
April 17, 2017: Vision Research
https://www.readbyqxmd.com/read/28426322/formative-research-to-design-a-promotional-campaign-to-increase-drinking-water-among-central-american-latino-youth-in-an-urban-area
#15
Nicole Barrett, Uriyoán Colón-Ramos, Allison Elkins, Ivonne Rivera, W Douglas Evans, Mark Edberg
Latinos consume more sugary drinks and less water than other demographic groups. Our objective was to understand beverage choice motivations and test promotional concepts that can encourage Central American Latino urban youth to drink more water. Two rounds of focus group discussions were conducted (n = 10 focus groups, 61 participants, 6-18 years old). Data were transcribed verbatim and analyzed using inductive and deductive coding approaches. Youth motivations for drinking water were shaped by level of thirst, weather, energy, and perceptions of health benefits...
April 20, 2017: Journal of Health Communication
https://www.readbyqxmd.com/read/28423976/screening-for-dyslexia-in-french-speaking-university-students-an-evaluation-of-the-detection-accuracy-of-the-alouette-test
#16
Eddy Cavalli, Pascale Colé, Gilles Leloup, Florence Poracchia-George, Liliane Sprenger-Charolles, Abdessadek El Ahmadi
Developmental dyslexia is a lifelong impairment affecting 5% to 10% of the population. In French-speaking countries, although a number of standardized tests for dyslexia in children are available, tools suitable to screen for dyslexia in adults are lacking. In this study, we administered the Alouette reading test to a normative sample of 164 French university students without dyslexia and a validation sample of 83 students with dyslexia. The Alouette reading test is designed to screen for dyslexia in children, since it taps skills that are typically deficient in dyslexia (i...
April 1, 2017: Journal of Learning Disabilities
https://www.readbyqxmd.com/read/28422429/development-of-the-headspace-family-and-friends-satisfaction-scale-findings-from-a-pilot-study
#17
Angela Nicholas, Erin Holloway, Nic Telford, Debra Rickwood
AIMS: The primary aim of this pilot study was to determine the psychometric properties of the 18-item headspace Family and Friends Satisfaction Scale (hFAFSS). METHODS: During August 2015, staff from 22 headspace centres approached family members and friends of young people attending headspace to complete the hFAFSS. Principal components analysis with oblique Promin rotation and polychoric correlations were used to assess the factor structure of the hFAFSS. RESULTS: There were 277 usable responses...
April 19, 2017: Early Intervention in Psychiatry
https://www.readbyqxmd.com/read/28422353/comprehensive-review-and-comparison-of-the-disinfection-techniques-currently-available-in-the-literature
#18
REVIEW
Ahila S Chidambaranathan, Muthukumar Balasubramanium
The goal of disinfection in the dental office is to prevent the spread of infection from one patient to another and maintain the safety of the dental care providers. Prevention of cross infection has significant effect on infection control. The standard procedure of rinsing impressions under tap water immediately after removal from the mouth eliminates microorganisms along with saliva and blood. A broad search on published literature was done using the keywords impression materials, disinfection method, and sterilization of dental impression from 1980 to 2016 in Medline, Google Scholar, the internet, and textbooks...
April 19, 2017: Journal of Prosthodontics: Official Journal of the American College of Prosthodontists
https://www.readbyqxmd.com/read/28421989/application-of-an-hplc-method-for-selective-determination-of-phenazopyridine-hydrochloride-theoretical-and-practical-investigations
#19
Khalid A M Attia, Nasr M El-Abasawi, Ahmed El-Olemy, Ahmed H Abdelazim
HPLC method was developed for the selective determination of phenazopyridine hydrochloride (PAP) in the presence of itscomputationally selected metabolite. Density functional theory was applied as a computational model to study the energy of PAP metabolites, and the results revealed that 2,3,6-triaminopyridine (TAP) is the most stable metabolite. Good resolution and separation of PAP from TAP was achieved using a reversed-phase BDS Hypersil C18 column with a mobile phase consisting of acetonitrile–water (75 + 25, v/v) at flow rate of 1 mL/min and with UV detection at 280 nm...
April 18, 2017: Journal of AOAC International
https://www.readbyqxmd.com/read/28421988/composite-magnetic-nanoparticles-cufe2o4-as-a-new-microsorbent-for-extraction-of-rhodamine-b-from-water-samples
#20
Ali Roostaie, Farzad Allahnoori, Shokooh Ehteshami
In this work, novel composite magnetic nanoparticles (CuFe2O4) were synthesized based on sol-gel combustion in the laboratory. Next, a simple production method was optimized for the preparation of the copper nanoferrites (CuFe2O4), which are stable in water, magnetically active, and have a high specific area used as sorbent material for organic dye extraction in water solution. CuFe2O4 nanopowders were characterized by field-emission scanning electron microscopy (SEM), FTIR spectroscopy, and energy dispersive X-ray spectroscopy...
April 18, 2017: Journal of AOAC International
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