keyword
MENU ▼
Read by QxMD icon Read
search

Analytics

keyword
https://www.readbyqxmd.com/read/28449550/modeling-the-effects-of-nanopatterned-surfaces-on-wetting-states-of-droplets
#1
Ke Xiao, Yanping Zhao, Gang Ouyang, Xinlei Li
An analytic thermodynamic model has been established to quantitatively investigate the wetting states of droplets on nanopatterned surfaces. Based on the calculations for the free energies of droplets with the Wenzel state and the Cassie-Baxter state, it is found that the size and shape of nanostructured surfaces play crucial roles in wetting states. In detail, for nanohole-patterned surfaces, the deep and thin nanoholes lead to the Cassie-Baxter state, and contrarily, the shallow and thick nanoholes result in the Wenzel state...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28449378/analysis-of-toldimfos-in-porcine-muscle-and-bovine-milk-using-liquid-chromatography-triple-quadrupole-mass-spectrometry
#2
Dan Zhang, Jin-A Park, A M Abd El-Aty, Seong-Kwan Kim, Sang-Hyun Cho, Weijia Zheng, Jeong-Min Choi, Jae-Han Shim, Byung-Joon Chang, Jin-Suk Kim, Ho-Chul Shin
An analytical method was developed for the detection of toldimfos sodium residues in porcine muscle and bovine milk using liquid chromatography-triple quadrupole tandem mass spectrometry (LC-MS/MS) analysis. The drug was extracted from muscle and milk using 10 mM ammonium formate in acetonitrile and then purified using n-hexane. The drug was well separated on a Luna C18 column using a mixture of 10 mM ammonium formate in ultrapure water (A) and acetonitrile (B) as the mobile phase. Good linearity was achieved over the tested concentration range (0...
April 27, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/28449114/neuro-symbolic-representation-learning-on-biological-knowledge-graphs
#3
Mona Alshahrani, Mohammed Asif Khan, Omar Maddouri, Akira R Kinjo, Núria Queralt-Rosinach, Robert Hoehndorf
Motivation: Biological data and knowledge bases increasingly rely on Semantic Web technologies and the use of knowledge graphs for data integration, retrieval and federated queries. In the past years, feature learning methods that are applicable to graph-structured data are becoming available, but have not yet widely been applied and evaluated on structured biological knowledge. Results: We develop a novel method for feature learning on biological knowledge graphs...
April 25, 2017: Bioinformatics
https://www.readbyqxmd.com/read/28449104/liquid-chromatographic-chemometric-techniques-for-the-simultaneous-hplc-determination-of-lansoprazole-amoxicillin-and-clarithromycin-in-commercial-preparation
#4
A Hakan Aktas, Ayse Mine Saridag
Two multivariate calibration-prediction techniques, principal component regression (PCR) and partial least-squares regression (PLSR) were applied to the chromatographic multicomponent analysis of the drug containing lansoprazole (LAN), clarithromycin (CLA) and amoxicillin (AMO). Optimum chromatographic separation of LAN, CLA and AMO with atorvastatin as the internal standard (IS) was obtained by using Xterra® RP18 column 5 μm 4.6 × 250 mm2, and 25 mM ammonium chloride buffer prepared ammonium chloride, acetonitrile and bidistilled water (45:45:10 v/v) as the mobile phase at flow rate 1...
April 26, 2017: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/28449006/a-meta-analysis-comparing-the-risk-of-metastases-in-patients-with-rectal-cancer-and-mri-detected-extramural-vascular-invasion-mremvi-vs-mremvi-negative-cases
#5
Muhammed R S Siddiqui, Constantinos Simillis, Chris Hunter, Manish Chand, Jemma Bhoday, Aurelie Garant, Te Vuong, Giovanni Artho, Shahnawaz Rasheed, Paris Tekkis, Al-Mutaz Abulafi, Gina Brown
BACKGROUND: Pathological extramural vascular invasion (EMVI) is an independent prognostic factor in rectal cancer, but can also be identified on MRI-detected extramural vascular invasion (mrEMVI). We perform a meta-analysis to determine the risk of metastatic disease at presentation and after surgery in mrEMVI-positive patients compared with negative tumours. METHODS: Electronic databases were searched from January 1980 to March 2016. Conventional meta-analytical techniques were used to provide a summative outcome...
April 27, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28449002/purification-and-biochemical-and-kinetic-properties-of-an-endo-polygalacturonase-from-the-industrial-fungus-aspergillus-sojae
#6
Dante Fratebianchi, Ivana Alejandra Cavello, Sebastián Fernando Cavalitto
An endo-polygalacturonase secreted by Aspergillus sojae was characterized after being purified to homogeneity from submerged cultures with orange peel as the sole carbon source by gel filtration and ion-exchange chromatographies. According to SDS-PAGE and analytical isoelectric focusing analyses, the enzyme presents a molecular weight of 47 kDa and pI value of 4.2. This enzyme exhibits considerable stability under highly acidic to neutral conditions (pH 1.5-6.5) and presents a half-life of 2 h at 50°C. Besides its activity towards pectin and polygalacturonic acid, the enzyme displays pectin-releasing activity, acting best in a pH range of 3...
April 28, 2017: Journal of Molecular Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28448929/microbial-use-of-low-molecular-weight-dom-in-filtered-and-unfiltered-freshwater-role-of-ultra-small-microorganisms-and-implications-for-water-quality-monitoring
#7
F L Brailsford, H C Glanville, M R Marshall, P N Golyshin, P J Johnes, C A Yates, A T Owen, D L Jones
Dissolved organic matter (DOM) plays a central role in regulating productivity and nutrient cycling in freshwaters. It is therefore vital that we can representatively sample and preserve DOM in freshwaters for subsequent analysis. Here we investigated the effect of filtration, temperature (5 and 25°C) and acidification (HCl) on the persistence of low molecular weight (MW) dissolved organic carbon (DOC), nitrogen (DON) and orthophosphate in oligotrophic and eutrophic freshwater environments. Our results showed the rapid loss of isotopically-labelled glucose and amino acids from both filtered (0...
April 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28448886/new-analytical-method-for-determination-of-epimer-metabolites-in-rat-plasma-after-oral-administration-of-paeoniflorin-by-uplc-tof-ms-following-picolinoyl-derivatization
#8
Zhigang Wang, Shuhan Tang, Masao Hattori, Hailong Zhang, Ping Wang, Xiuhong Wu, Ning Zhang
A highly sensitive analytical method was developed to study the in vivo metabolism of paeoniflorin, one of the most principal components in traditional Chinese medicine. After hydrolyzation with sulfatase, the epimer metabolites 7S-paeonimetabolin I and 7R-paeonimetabolin I of paeoniflorin in rat plasma were successfully detected and well separated by LC-MS following picolinoyl derivatization for the first time. Borneol was used as the internal standard to quantify 7S-paeonimetabolin I and 7R-paeonimetabolin I in rat plasma...
April 19, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28448885/development-and-validation-of-a-liquid-chromatographic-method-for-the-analysis-of-squaric-acid-dibutyl-ester-and-its-impurities
#9
Marwa F Mansour, Peixi Zhu, Ann Van Schepdael, Erwin Adams
A simple, fast and selective stability indicating liquid chromatographic method has been described for the simultaneous determination of squaric acid dibutyl ester and its impurities. The chromatographic separation was achieved on a C2 column (250mm×4.6mm i.d., 5μm) using a mobile phase consisting of 0.15% phosphoric acid - acetonitrile - methanol (30:60:10, v/v/v). Isocratic elution was performed at a flow rate of 1.0mLmin(-1). The analytes were detected by UV at 252nm. The method was validated according to the ICH guidelines and satisfactory results were obtained...
April 18, 2017: Journal of Pharmaceutical and Biomedical Analysis
https://www.readbyqxmd.com/read/28448854/the-combined-use-of-analytical-tools-for-exploring-tetanus-toxin-and-tetanus-toxoid-structures
#10
Caroline Bayart, Sébastien Peronin, Elisa Jean, Joseph Paladino, Philippe Talaga, Marc Le Borgne
Aldehyde detoxification is a process used to convert toxin into toxoid for vaccine applications. In the case of tetanus toxin (TT), formaldehyde is used to obtain the tetanus toxoid (TTd), which is used either for the tetanus vaccine or as carrier protein in conjugate vaccines. Several studies have already been conducted to better understand the exact mechanism of this detoxification. Those studies led to the identification of a number of formaldehyde-induced modifications on lab scale TTd samples. To obtain greater insights of the changes induced by formaldehyde, we used three industrial TTd batches to identify repeatable modifications in the detoxification process...
April 4, 2017: Journal of Chromatography. B, Analytical Technologies in the Biomedical and Life Sciences
https://www.readbyqxmd.com/read/28448825/health-policy-in-the-concertaci%C3%A3-n-era-1990-2010-reforms-the-chilean-way
#11
María Soledad Martinez-Gutierrez, Cristóbal Cuadrado
The Chilean health system has experienced important transformations in the last decades with a neoliberal turn to privatization of the health insurance and healthcare market since the Pinochet reforms of the 1980s. During 20 years of center-left political coalition governments several reforms were attempted to regulate and reform such markets. This paper analyzes regulatory policies for the private health insurance and health care delivery market, adopted during the 1990-2010 period. A framework of variation in market types developed by Gingrich is adopted as analytical perspective...
April 9, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28448799/isolation-of-antioxidant-phenolics-from-schinopsis-brasiliensis-based-on-a-preliminary-lc-ms-profiling
#12
Clisiane Carla de Souza Santos, Milena Masullo, Antonietta Cerulli, Angela Mari, Charles Dos Santos Estevam, Cosimo Pizza, Sonia Piacente
The phenolic content of the ethanol extract of the stem bark of the Brazilian plant Schinopsis brasiliensis Engl. (Anacardiaceae) has been evaluated together with the antioxidant activity. The good antioxidant activity exhibited in the Trolox Equivalent Antioxidant Capacity (TEAC) assay (TEAC value = 3.04 mg/mL) encouraged us to investigate its constituents. An analytical approach based on LC-ESIMS(n) was applied to rapidly obtain a metabolite profile of the ethanol extract of the stem bark of S. brasiliensis...
April 24, 2017: Phytochemistry
https://www.readbyqxmd.com/read/28448749/testing-and-application-of-simple-semi-analytical-models-for-soil-temperature-estimation-and-prediction-in-environmental-assessments
#13
Ioannis X Tsiros, Fotoula Droulia, Eleni Thoma, Basil Psiloglou
The ability of various semi-analytical models to predict soil temperature profiles in an experimental plot during a 16-year monitoring study for soil depths up to 120 cm is evaluated. The models are developed from an analytical model by replacing the steady-state soil temperature with easily obtained hourly and daily average temperature values. Such values include the hourly air temperature, the daily average air temperature, the hourly soil temperature of selected soil depths from three daily observations, the daily average of the soil temperature profile and the hourly soil temperature for the bottom depth...
April 27, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28448690/evaluation-of-column-length-and-particle-size-effect-on-the-untargeted-profiling-of-a-phytochemical-mixture-by-using-uhplc-coupled-to-high-resolution-mass-spectrometry
#14
Riccardo Zenezini Chiozzi, Anna Laura Capriotti, Chiara Cavaliere, Francesca Ferraris, Giorgia La Barbera, Susy Piovesana, Aldo Laganà
Liquid chromatography coupled to high-resolution mass spectrometry is the technique of choice for the untargeted profiling of food matrices. Despite the high potential of high-resolution mass spectrometry, when dealing with complex mixtures, an efficient separation technique is also needed. The novel core-shell chromatographic columns packed with sub-2 μm sized particles are claimed to show very good resolution. However, the analytes retention can be significantly altered when working under ultra-high performance chromatographic conditions...
April 27, 2017: Journal of Separation Science
https://www.readbyqxmd.com/read/28448612/hydrodynamic-characteristics-of-submerged-vegetation-flow-with-non-constant-vertical-porosity
#15
Mingdeng Zhao, Zilong Fan
In order to investigate the influence of the vertical variation of porosity on open-channel flow with submerged vegetation, vertical non-homogeneous stumps and stems in submerged vegetation flow are simulated with truncated cones in a laboratory flume. First, porosity is defined as a function of water depth. A new governing equation for vegetation flow is established on the basis of the poroelastic media flow theory, and its analytical solution is obtained with the finite analytic method. Then, the fitting expression of permeability is established with experimental data, which shows the variation in permeability with vertical porosity and vegetation density...
2017: PloS One
https://www.readbyqxmd.com/read/28448466/multiplexed-electrochemical-immunosensors-for-clinical-biomarkers
#16
REVIEW
Paloma Yáñez-Sedeño, Susana Campuzano, José M Pingarrón
Management and prognosis of disease requires the accurate determination of specific biomarkers indicative of normal or disease-related biological processes or responses to therapy. Moreover since multiple determinations of biomarkers have demonstrated to provide more accurate information than individual determinations to assist the clinician in prognosis and diagnosis, the detection of several clinical biomarkers by using the same analytical device hold enormous potential for early detection and personalized therapy and will simplify the diagnosis providing more information in less time...
April 27, 2017: Sensors
https://www.readbyqxmd.com/read/28448271/separate-patient-serum-sodium-medians-from-males-and-females-provide-independent-information-on-analytical-bias
#17
Steen Ingemann Hansen, Per Hyltoft Petersen, Flemming Lund, Callum G Fraser, György Sölétormos
BACKGROUND: During monitoring of monthly medians of results from patients undertaken to assess analytical stability in routine laboratory performance, the medians for serum sodium for male and female patients were found to be significantly related. METHODS: Daily, weekly and monthly patient medians of serum sodium for both male and female patients were calculated from results obtained on samples from the population >18 years on three analysers in the hospital laboratory...
April 27, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28448229/breaking-through-the-glass-ceiling-consumers-in-mental-health-organisations-hierarchies
#18
Brett Scholz, Julia Bocking, Brenda Happell
Contemporary mental health policies call for consumers to be engaged in all levels of mental health service planning, implementation, and delivery. Critical approaches to traditional healthcare hierarchies can effectively challenge barriers to better engagement with consumers in mental health organisations. This qualitative exploratory study analyses how particular strategies for consumer leadership facilitate or hinder relationships between consumers and mental health services, and how these strategies influence hierarchical structures...
May 2017: Issues in Mental Health Nursing
https://www.readbyqxmd.com/read/28448159/the-centrality-of-the-response-process-in-construct-validity-an-illustration-via-the-rorschach-space-response
#19
Joni L Mihura, Nicolae Dumitrascu, Manali Roy, Gregory J Meyer
Recently, psychologists have emphasized the response process-that is, the psychological operations and behaviors that lead to test scores-when designing psychological tests, interpreting their results, and refining their validity. To illustrate the centrality of the response process in construct validity and test interpretation, we provide a historical, conceptual, and empirical review of the main uses of the background white space of the Rorschach cards, called space reversal (SR) and space integration (SI) in the Rorschach Performance Assessment System...
April 27, 2017: Journal of Personality Assessment
https://www.readbyqxmd.com/read/28448125/efficient-computation-of-exchange-energy-density-with-gaussian-basis-functions
#20
Fenglai Liu, Jing Kong
Density Functional Theory(DFT) is widely applied in chemistry and Physics. Still it fails to predict correctly quantitatively or even qualitatively for systems with significant nondynamic correlations. Several DFT functionals were proposed in recently years to treat nondynamic correlation, most of which added the exact exchange energy density as a new variable, which becomes the computational bottleneck for calculations with these new functionals We present an implementation of an efficient seminumerical algorithm in this paper as a solution for this computational bottleneck...
April 27, 2017: Journal of Chemical Theory and Computation
keyword
keyword
18425
1
2
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"