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https://www.readbyqxmd.com/read/29155550/carbon-fiber-ionization-mass-spectrometry-for-the-analysis-of-analytes-in-vapor-liquid-and-solid-phases
#1
Min-Li Wu, Te-Yu Chen, Yen-Chun Chen, Yu-Chie Chen
Various ionization methods in mass spectrometry (MS) are available for the analysis of analytes with different properties. Nonetheless, using a single ionization method to analyze mixtures containing analytes with different polarities and volatiles in different phases at atmospheric pressure remains a challenge. Exploring an ionization method that can ionize small organics and large biomolecules with different properties for MS analysis is advantageous. Carbon fiber ionization mass spectrometry (CFI-MS) that uses a carbon fiber bundle as the ion source is useful for the analysis of small organics with low polarities...
November 20, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/29155546/a-novel-electrochemical-biosensor-based-on-a-double-signal-technique-for-d-cag-n-trinucleotide-repeats
#2
Jiao Li, Yalan Liu, Xiaoqian Zhu, Gang Chang, Hanping He, Xiuhua Zhang, Shengfu Wang
Electrochemical sensors now play an important role in analysis and detection of nucleic acids. In this work, we present a novel double-signal technique for electrochemically measuring the sequence and length of the d(CAG)n repeat. The double-signal technique used an electrochemical molecular beacon (a hairpin DNA labeled with ferrocene), which was directly modified on the surface of a gold electrode. While a reporter probe (a DNA sequence labeled with horseradish peroxidase) was hybridized to the target DNA...
November 20, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29155389/effect-of-the-polyelectrolyte-coating-on-the-photothermal-efficiency-of-gold-nanorods-and-the-photothermal-induced-cancer-cell-damage
#3
Rashmi Shrivastava, Alok Dube
Coating gold nanorods (GNRs) with polyelectrolytes is an effective approach to make them biocompatible for potential use in photothermal treatment (PTT) of cancer. The authors report the effect of coating of the GNRs with polystyrene sulphonate (PSS-GNRs) and PSS plus poly di-allyl di-methyl ammonium chloride (PDDAC-GNRs) on its photothermal conversion efficiency (PTE), cellular uptake and subsequently the photothermal induced cytotoxicity in human oral cancer cells (NT8e). Coating of GNRs with PSS led to decrease in PTE by ∼30% and further coating it with PDDAC led to its increase to similar level, with respect to as- prepared GNRs...
December 2017: IET Nanobiotechnology
https://www.readbyqxmd.com/read/29154949/a-novel-microscopy-based-assay-identifies-extended-synaptotagmin-1-esyt1-as-a-positive-regulator-of-anoctamin-1-traffic
#4
Joana R Lérias, Madalena C Pinto, Hugo M Botelho, Nikhil T Awatade, Margarida C Quaresma, Iris A L Silva, Podchanart Wanitchakool, Rainer Schreiber, Rainer Pepperkok, Karl Kunzelmann, Margarida D Amaral
An attractive possibility to treat Cystic Fibrosis (CF), a severe condition caused by dysfunctional CFTR, an epithelial anion channel, is through the activation of alternative (non-CFTR) anion channels. Anoctamin 1 (ANO1) was demonstrated to be a Ca(2+)-activated chloride channel (CaCC) and thus of high potential to replace CFTR. Despite that ANO1 is expressed in human lung CF tissue, it is present at the cell surface at very low levels. In addition, little is known about regulation of ANO1 traffic, namely which factors promote its plasma membrane (PM) localization...
November 15, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/29152247/effects-of-different-protein-sources-on-fermentation-metabolites-and-nutrient-digestibility-of-brachycephalic-dogs
#5
Maria Isabel Gonzalez Urrego, Laura Fantucci de O Matheus, Karine de Melo Santos, Mariane Ceschin Ernandes, Mariana Monti, Danilo Ferreira de Souza, Júlio Cesar de Carvalho Balieiro, Lúcio Francelino Araújo, Cristiana F Ferreira Pontieri, Márcio Antonio Brunetto
Benefits to microbial fermentation in the colon and as a consequence less flatulence can be promoted for the health of adult dogs according to the amount and protein source. The present study evaluated different protein sources in dry food for brachycephalic dogs regarding microbial fermentation and nutrient digestibility. Four dry dog foods with similar protein content were formulated for adult maintenance: poultry meal (PM) diet; wheat gluten (WG) diet; PM + WG diet; and PM + WG + hydrolysed protein (HP) diet...
2017: Journal of Nutritional Science
https://www.readbyqxmd.com/read/29152029/portable-detection-of-trace-metals-in-airborne-particulates-and-sediments-via-%C3%AE-pads-and-smartphone
#6
Yuan Jia, Hui Dong, Jianping Zheng, Hao Sun
Particulate matter (PM), a key indicator of air pollution by natural and anthropogenic activities, contributes to a wide spectrum of diseases that lead to a shortening of life expectancy. It has been recognized that trace metals in airborne PM are highly toxic and can be correlated with lesion in respiratory, gastrointestinal, immunological, and hematological systems. Traditional methods for trace metal assay require sophisticated instrumentations and highly trained operators in centralized laboratories. In this work, by integrating the technologies of microfluidic paper-based analytical devices, additive manufacturing, smartphone, and colorimetric sensing, we developed the first smartphone based paper microfluidic platform for portable, disposable, and quantitative measurements of cobalt (Co), copper (Cu), and iron (Fe) in ambient air and street sediments...
November 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/29151682/anterior-segment-morphology-in-primary-angle-closure-glaucoma-using-ultrasound-biomicroscopy
#7
Tarannum Mansoori, Nagalla Balakrishna
Aim: To evaluate the configuration of the anterior chamber angle quantitatively and study the morphological changes in the eye with ultrasound biomicroscopy (UBM) in primary angle closure glaucoma (PACG) patients after laser peripheral iridotomy (LPI). Materials and methods: A total of 185 eyes of 185 PACG patients post-LPI and 126 eyes of 126 normal subjects were included in this prospective study. All subjects underwent complete ophthalmic evaluation, A-scan biometry, and UBM...
September 2017: Journal of Current Glaucoma Practice
https://www.readbyqxmd.com/read/29151520/dropped-head-syndrome-and-the-presence-of-rimmed-vacuoles-in-a-muscle-biopsy-in-scleroderma-polymyositis-overlap-syndrome-associated-with-anti-ku-antibody
#8
Yoshida Takeshi, Yoshida Mai, Mitsuyo Kinjo, Jonosono Manabu, Higuchi Itsuro
A 66-year-old woman with a history of interstitial lung disease presented with a 3-month history of dropped head syndrome (DHS), followed by camptocormia and extremity weakness. A clinical examination revealed Raynaud phenomenon, arthralgia, distal skin sclerosis, and microbleeds in the nailfold capillaries. An anti-Ku antibody test was positive. A muscle biopsy revealed inflammatory myopathy with rimmed vacuoles (RVs). The diagnosis of scleroderma-polymyositis (SSc-PM) overlap syndrome was made. RVs on a muscle biopsy in a patient with inflammatory myositis involving axial muscles may be seen either in inclusion body myositis or SSc-PM overlap syndrome...
November 20, 2017: Internal Medicine
https://www.readbyqxmd.com/read/29151353/challenges-in-application-of-langmuir-monolayer-studies-to-determine-the-mechanisms-of-bactericide-activity-of-ruthenium-complexes
#9
Bianca Sandrino, Jessica Fernanda Affonso de Oliveira, Thatyane M Nobre, Patricia Appelt, Akash Gupta, Marcio Peres de Araujo, Vincent M Rotello, Osvaldo Novais Oliveira
The effects induced by antibiotics on the bacteria membrane may be correlated with their bactericidal activity, and such molecular-level interactions can be probed with Langmuir monolayers representing the cell membrane. In this study, we investigated the interaction between [Ru(mcbtz)2(PPh3)2] (RuBTZ, mcbtz= 2-mercaptobenzothiazoline) and [Ru(mctz)2(PPh3)2] (RuCTZ, mctz= 2-mercaptothiazoline) with Langmuir monolayers of a lipid extract of Escherichia coli, an extract of lipopolysaccharides (LPS) and a zwitterionic phospholipid, dioleoylphosphatidyl choline (DOPC)...
November 20, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29151182/electrical-cardioversion-of-patients-with-implanted-pacemaker-or-cardioverter-defibrillator-results-of-a-survey-of-german-centers-and-systematic-review-of-the-literature
#10
J Lüker, A Sultan, T Plenge, J van den Bruck, C-H Heeger, S Meyer, K Mischke, R R Tilz, D Vollmann, G Nölker, B Schäffer, S Willems, D Steven
AIMS: A relevant number of patients presenting for electrical cardioversion carry a pacemaker (PM) or ICD. Case reports suggest a potential hazard of external cardioversion/defibrillation. The incidence of shock related device complications is unknown. No guidelines or recommendations by international medical societies for a cardioversion protocol of cardiovascular implantable electronic device (CIED) patients exist. We conducted a nationwide survey to gather real-world clinical data on the current clinical approach towards these patients during electrical cardioversion and to estimate the incidence of shock-related complications...
November 18, 2017: Clinical Research in Cardiology: Official Journal of the German Cardiac Society
https://www.readbyqxmd.com/read/29151145/pendimethalin-induces-oxidative-stress-dna-damage-and-mitochondrial-dysfunction-to-trigger-apoptosis-in-human-lymphocytes-and-rat-bone-marrow-cells
#11
Sabiha M Ansari, Quaiser Saquib, Sabry M Attia, Eslam M Abdel-Salam, Hend A Alwathnani, Mohammad Faisal, Abdulrahman A Alatar, Abdulaziz A Al-Khedhairy, Javed Musarrat
Pendimethalin (PM) is a dinitroaniline herbicide extensively applied against the annual grasses and broad-leaved weeds. There is no report available on PM-induced low-dose genotoxicity in human primary cells and in vivo test models. Such data gap has prompted us to evaluate the genotoxic potential of PM in human lymphocytes and rats. PM selectively binds in the minor groove of DNA by forming covalent bonds with G and C nitrogenous bases, as well as with the ribose sugar. PM induces micronucleus formation (MN) in human lymphocytes, indicating its clastogenic potential...
November 18, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/29149989/low-background-and-visual-detection-of-antibiotic-based-on-target-activated-colorimetric-split-peroxidase-dnazyme-coupled-with-dual-nicking-enzyme-signal-amplification
#12
REVIEW
Xuejun Cui, Rongguo Li, Xiaofei Liu, Jingfeng Wang, Xueqi Leng, Xiaolei Song, Qianqian Pei, Yu Wang, Su Liu, Jiadong Huang
Herein, we have reported the development of a simple, rapid, and low cost colorimetric method for the detection of antibiotic based on target-activated split peroxidase DNAzyme coupled with dual nicking enzyme signal amplification (NESA). To lower background signal in G-quadruplex DNAzyme-based detection, the two split G-rich parts are caged into two different hairpin probes, respectively, preventing the two parts from assembling into the G-quadruplex structure. By the combination of restriction endonuclease-assisted cleavage reaction with the spilt G-quadruplex probes, target-modulated release of the two split G-rich parts is achieved, affording high specificity of antibiotic detection...
January 2, 2018: Analytica Chimica Acta
https://www.readbyqxmd.com/read/29149692/acute-stress-affects-prospective-memory-functions-via-associative-memory-processes
#13
Ágnes Szőllősi, Péter Pajkossy, Gyula Demeter, Szabolcs Kéri, Mihály Racsmány
Recent findings suggest that acute stress can improve the execution of delayed intentions (prospective memory, PM). However, it is unclear whether this improvement can be explained by altered executive control processes or by altered associative memory functioning. To investigate this issue, we used physical-psychosocial stressors to induce acute stress in laboratory settings. Then participants completed event- and time-based PM tasks requiring the different contribution of control processes and a control task (letter fluency) frequently used to measure executive functions...
November 14, 2017: Acta Psychologica
https://www.readbyqxmd.com/read/29149218/carbonaceous-particulate-matter-on-the-lung-surface-from-adults-living-in-s%C3%A3-o-paulo-brazil
#14
Michele Galhardoni Padovan, Abigail Whitehouse, Nelson Gouveia, Mateus Habermann, Jonathan Grigg
OBJECTIVES: We therefore sought to identify the exposures associated with lung surface in long-term residents of São Paulo, Brazil. METHODS: Lung surface carbon were analyzed in 72 autopsy specimens by image analysis. Smoking history, measured PM10 nearest to the home, distance to main road, and distance-weighted traffic density were used as exposure variables. Data are summarized as median (IQR), and compared by Mann Whitney Test, with correlations done by Spearman's correlation...
2017: PloS One
https://www.readbyqxmd.com/read/29148928/spatiotemporal-variations-and-relationship-of-pm-and-gaseous-pollutants-based-on-gray-correlation-analysis
#15
Yong Y Zhang, Ying Jia, Ming Li, Li A Hou
The present work characterizes the spatiotemporal variations of air pollution at four sites in Xi'an city. The investigations lasted for 1 year: January 1 through December 31, 2015. The concentrations of CO, NO2, O3, PM and SO2 were systematically monitored. The gray correlation analysis was used to correlate PM2.5 and gaseous pollutants. The formation mechanisms of sulfate and nitrate aerosols were discussed. Results clearly revealed severe air pollution by PM2.5, PM10 and NO2 at all four sites. Significant monthly variations were observed for PM2...
November 17, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/29148811/continuous-pore-spanning-lipid-bilayers-on-silicon-oxide-coated-porous-substrates
#16
Nelli Teske, Jeremias Sibold, Johannes Schumacher, Nikolas K Teiwes, Martin Gleisner, Ingo P Mey, Claudia Steinem
A number of techniques has been developed and analyzed in recent years to generate pore-spanning membranes (PSMs). While quite a number of methods rely on nanoporous substrates, only a few use micrometer-sized pores to be able to individually resolve suspending membranes by means of fluorescence microscopy. To be able to produce PSMs on pores that are micrometer in size, an orthogonal functionalization strategy resulting in a hydrophilic surface is highly desirable. Here, we report on a method to prepare PSMs based on the evaporation of a thin layer of silicon monoxide on top of the porous substrate...
November 17, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29148773/in-situ-nondestructive-analysis-of-kalanchoe-pinnata-leaf-surface-structure-by-polarization-modulation-infrared-reflection-absorption-spectroscopy
#17
Tetsuya Hama, Akira Kouchi, Naoki Watanabe, Shinichi Enami, Takafumi Shimoaka, Takeshi Hasegawa
The outermost surface of the leaves of land plants is covered with a lipid membrane called the cuticle that protects against various stress factors. Probing the molecular-level structure of the intact cuticle is highly desirable for understanding its multifunctional properties. We report the in situ characterization of the surface structure of Kalanchoe pinnata leaves using polarization-modulation infrared reflection-absorption spectroscopy (PM-IRRAS). Without sample pretreatment, PM-IRRAS measures the IR spectra of the leaf cuticle of a potted K...
November 17, 2017: Journal of Physical Chemistry. B
https://www.readbyqxmd.com/read/29147853/biospecimen-donation-among-black-and-white-breast-cancer-survivors-opportunities-to-promote-precision-medicine
#18
Vanessa B Sheppard, Alejandra Hurtado-de-Mendoza, Yun-Ling Zheng, Ying Wang, Kristi D Graves, Tania Lobo, Hanfei Xu, Yvonne Jennings, Dennis Tolsma, Martha Trout, Brandi E Robinson, Brittany McKinnon, Mahlet Tadesse
PURPOSE: Advances in precision medicine (PM) have potential to reduce and/or eliminate breast cancer disparities in both treatment and survivorship. However, compared to white Americans, black Americans are often underrepresented in genetic research. This report assessed factors that influence receipt of buccal cells via saliva kits. METHODS: This prospective study recruited women with confirmed hormonal-positive (HR+) breast cancer (BC). A standardized telephone survey collected sociodemographic, socio-cultural (e...
November 16, 2017: Journal of Cancer Survivorship: Research and Practice
https://www.readbyqxmd.com/read/29147697/role-of-spin-orbit-interaction-on-the-nonlinear-optical-response-of-cspbco3f-using-dft
#19
E Narsimha Rao, G Vaitheeswaran, Ali H Reshak, S Auluck
We explore the effect of spin-orbit interaction (SOI) on the electronic and optical properties of CsPbCO3F using the full potential linear augmented plane wave method with the density functional theory (DFT) approach. CsPbCO3F is known for its high powder second harmonic generation (SHG) coefficient (13.4 times (d36 = 0.39 pm V(-1)) that of KH2PO4 (KDP)). Calculations are done for many exchange correlation (XC) potentials. After the inclusion of SOI, the calculated Tran-Blaha modified Becke-Johnson (TB-mBJ) band gap of 5...
November 17, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29147168/study-of-the-characteristics-of-pulmonary-trunk-in-pulmonary-hypertension-secondary-to-left-heart-disease-using-pressure-velocity-loops-pu-loops
#20
Shizuo Hanya, Kengo Yoshii, Motoaki Sugawara
Objectives: Although pulmonary hypertension (PH) caused by left heart disease (PH-LHD) is more common in PH, little is known about its properties of pulmonary artery (PA) in PH-LHD. The purpose of this study was to measure pulmonary regional pulse wave velocity (PWV) and to quantify the magnitude of reflected waves in patients with PH-LHD by the analysis of the pressure-velocity loops (PU-loop). Methods: High-fidelity PA pressure (Pm) and PA velocity (Vm) were measured in 11 subjects with PH-LHD (mean Pm>25 mmHg), 1 subject with atrial septal defect (ASD) without PH and 12 control subjects, using multisensor catheters...
September 25, 2017: Annals of Vascular Diseases
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