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https://www.readbyqxmd.com/read/28812169/bond-strength-of-etch-and-rinse-and-self-etch-adhesive-systems-to-enamel-and-dentin-irradiated-with-a-novel-co2-9-3%C3%A2-%C3%AE-m-short-pulsed-laser-for-dental-restorative-procedures
#1
Peter Rechmann, N Bartolome, R Kinsel, R Vaderhobli, B M T Rechmann
The objective of this study was to evaluate the influence of CO2 9.3 μm short-pulsed laser irradiation on the shear bond strength of composite resin to enamel and dentin. Two hundred enamel and 210 dentin samples were irradiated with a 9.3 µm carbon dioxide laser (Solea, Convergent Dental, Inc., Natick, MA) with energies which either enhanced caries resistance or were effective for ablation. OptiBond Solo Plus [OptiBondTE] (Kerr Corporation, Orange, CA) and Peak Universal Bond light-cured adhesive [PeakTE] (Ultradent Products, South Jordan, UT) were used...
August 15, 2017: Lasers in Medical Science
https://www.readbyqxmd.com/read/28811657/colorimetric-fingerprints-of-gold-nanorods-for-discriminating-catecholamine-neurotransmitters-in-urine-samples
#2
Somayeh Jafarinejad, Mahmoud Ghazi-Khansari, Forough Ghasemi, Pezhman Sasanpour, M Reza Hormozi-Nezhad
Catecholamine neurotransmitters, generally including dopamine (DA), epinephrine (EP) and norepinephrine (NE) are known as substantial indicators of various neurological diseases. Simultaneous detection of these compounds and their metabolites is highly recommended in early clinical diagnosis. To this aim, in the present contribution, a high performance colorimetric sensor array has been proposed for the detection and discrimination of catecholamines based on their reducing ability to deposit silver on the surface of gold nanorods (AuNRs)...
August 15, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28811099/understanding-operational-system-differences-for-transfer-of-miniaturized-chromatography-column-data-using-simulations
#3
William R Keller, Steven T Evans, Gisela Ferreira, David Robbins, Steven M Cramer
In this paper, a simulation tool was employed to identify and appropriately incorporate differences between MiniColumns and benchtop column systems. It was first demonstrated that including multi-step gradients and fraction collection into the simulations resulted in improved agreement between simulated and experimental linear gradient profiles as well as calculated first moments in the MiniColumn experiments. Step elution experiments of binary mixtures (a monoclonal antibody and one of three model proteins) were then carried out to examine comparability of the MiniColumns to the benchtop system...
August 1, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28811087/real-time-qrt-pcr-assay-for-the-detection-of-mirnas-using-bi-directional-extension-sequences
#4
Kyung Jin Kim, Jiwon Kwak, Jae-Hoon Lee, Soo Suk Lee
Highly specific detection of miRNAs was performed using a novel bi-directional extension (BDE) assay. After reverse transcription, the cDNA was hybridized to a uniquely designed specific BDE sequence; this cDNA-BDE hybrid forms the PCR template. The PCR template was amplified in a SYBR Green-based quantitative real-time PCR. The miR-145 in human brain total RNA could be detected quantitatively in the range of seven orders of magnitude with high linearity and reproducibility. This innovative BDE assay has several performance advantages over the poly(A) tailing method that include lower CT values, clear gel electrophoresis images, and distinct nucleotide peaks in sequencing chromatograms...
August 12, 2017: Analytical Biochemistry
https://www.readbyqxmd.com/read/28811031/bayesian-approach-to-peak-deconvolution-and-library-search-for-high-resolution-gas-chromatography-mass-spectrometry
#5
A Barcaru, H G J Mol, M Tienstra, G Vivó-Truyols
A novel probabilistic Bayesian strategy is proposed to resolve highly coeluting peaks in high-resolution GC-MS (Orbitrap) data. Opposed to a deterministic approach, we propose to solve the problem probabilistically, using a complete pipeline. First, the retention time(s) for a (probabilistic) number of compounds for each mass channel are estimated. The statistical dependency between m/z channels was implied by including penalties in the model objective function. Second, Bayesian Information Criterion (BIC) is used as Occam's razor for the probabilistic assessment of the number of components...
August 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28811027/design-of-carbohydrate-electron-transfer-peptides-for-human-histocytic-lymphoma-cell-sensing
#6
Kazuharu Sugawara, Toshihiko Kadoya, Hideki Kuramitz, Yoshihiro Mihara
A carbohydrate/electro-transfer peptide probe was fabricated to perform cell sensing. The probe consisted of a cello-oligosaccharide that was created by the conjugation of an electron-transfer peptide (Y5C) and a carbohydrate via a Schiff base. An oxidation wave due to a phenolic hydroxyl group was obtained by scanning with a glassy carbon electrode. This cell-sensing system was based on a competitive reaction between carbohydrates on a cell surface and the probe as each reacted to a protein that recognized the carbohydrate...
August 29, 2017: Analytica Chimica Acta
https://www.readbyqxmd.com/read/28810990/gait-and-functional-outcomes-for-young-active-males-with-traumatic-unilateral-transfemoral-limb-loss
#7
Caitlin E Mahon, Alison L Pruziner, Brad D Hendershot, Erik J Wolf, Benjamin J Darter, K Bo Foreman, Joseph B Webster
OBJECTIVE: Altered body structures that occur with the loss of a lower limb can impact mobility and quality of life. Specifically, biomechanical changes that result from wearing a prosthesis have been associated with an increased risk of falls or joint degeneration, as well as increased energy demands. While previous studies describing these outcomes are typically limited by number of outcome measures and/or small, diverse patient groups, recent military conflicts present a unique opportunity to collect outcomes from a relatively homogenous, active patient population with limb loss...
July 2017: Military Medicine
https://www.readbyqxmd.com/read/28810948/development-and-validation-of-a-robust-and-efficient-hplc-method-for-the-simultaneous-quantification-of-levodopa-carbidopa-benserazide-and-entacapone-in-complex-matrices
#8
Erik Wollmer, Sandra Klein
PURPOSE: A variety of fixed-dose combination products is used in the therapy of Parkinson Disease. However, to date a proper analytical method applicable for comparative screening of different antiparkinson products was not available. The objective of the present work was thus to develop and validate an analytical method for the simultaneous quantification of levodopa, carbidopa, benserazide and entacapone. The method should be applicable for quantifying samples from drug release experiments with marketed products and prototype formulations performed under compendial and biorelevant test conditions...
2017: Journal of Pharmacy & Pharmaceutical Sciences: a Publication of the Canadian Society for Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28810220/effectiveness-of-piggery-waste-treatment-using-microbial-fuel-cells-coupled-with-elutriated-phased-acid-fermentation
#9
K Chandrasekhar, Young-Ho Ahn
The present study evaluates the feasibility of increased power generation in microbial fuel cells (MFCs) coupled with acid elutriation fermentation. Raw piggery waste (RPW) and acid elutriation effluents (AEE) of piggery waste were used to generate bioelectricity in single-chambered air-cathode MFCs. RPW-fed MFCs exhibited stable performance after 12-days of operation, generating 540mV of open circuit voltage (OCV). RPW fed-MFCs displayed peak potential and maximal power density (PDmax) of 0.364V and 192mW/m(2) with 980Ω external resistance (Rext), respectively...
August 7, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28809759/independent-dose-verification-system-with-monte-carlo-simulations-using-topas-for-passive-scattering-proton-therapy-at-the-national-cancer-center-in-korea
#10
Wook-Geun Shin, Mauro Testa, Hak Soo Kim, Jong Hwi Jeong, Se Byeong Lee, Yeon-Joo Kim, Chul Hee Min
For the independent validation of treatment plans, we developed a Monte Carlo (MC)-based patient dose calculation system with the tool for particle simulation (TOPAS) to enable routine and automatic dose recalculation for each patient. The proton beam nozzle was modeled with TOPAS to simulate the therapeutic beam, and MC commissioning was performed by comparing percent depth dose with the measurement. The beam set-up based on the prescribed beam range and modulation width was automated by modifying the vendor-specific method...
August 15, 2017: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/28809618/corneal-donations-in-south-africa-a-15-year-review
#11
Nicholas J York, Christopher Tinley
BACKGROUND: Corneal pathology is one of the leading causes of preventable blindness in South Africa (SA). A corneal transplant can restore or significantly improve vision in most cases. However, in SA there is a gross shortage of corneal tissue available to ophthalmologists. Little has been published describing the magnitude of the problem. OBJECTIVES: To describe trends in the number of corneal donors per year in SA, the number of corneal transplants performed each year, the origin of donors, the allocation of corneas to the public or private sector, and the demographics of donors...
July 28, 2017: South African Medical Journal, Suid-Afrikaanse Tydskrif Vir Geneeskunde
https://www.readbyqxmd.com/read/28808630/systematic-review-on-the-use-of-autologous-matrix-induced-chondrogenesis-for-the-repair-of-articular-cartilage-defects-in-patients
#12
Nafisa Shaikh, Matthew K T Seah, Wasim S Khan
AIM: To systematically review the results of studies looking at autologous matrix-induced chondrogenesis (AMIC) in humans. METHODS: A literature search was performed, adhering to the PRISMA guidelines, to review any studies using such techniques in humans. Our initial search retrieved 297 articles listed on MEDLINE, Google Scholar, CINHal and EMBASE. From these studies, 15 studies meeting the eligibility criteria were selected and formed the basis of our systematic review...
July 18, 2017: World Journal of Orthopedics
https://www.readbyqxmd.com/read/28808490/the-influence-of-intermittent-fasting-on-the-circadian-pattern-of-melatonin-while-controlling-for-caloric-intake-energy-expenditure-light-exposure-and-sleep-schedules-a-preliminary-report
#13
Aljohara S Almeneessier, Ahmed S Bahammam, Munir M Sharif, Salman A Bahammam, Samar Z Nashwan, Seithikurippu R Pandi Perumal, Daniel P Cardinali, Mohammad Alzoghaibi
AIMS: We hypothesized that if we control for food composition, caloric intake, light exposure, sleep schedule, and exercise, intermittent fasting would not influence the circadian pattern of melatonin. Therefore, we designed this study to assess the effect of intermittent fasting on the circadian pattern of melatonin. METHODS: Eight healthy volunteers with a mean age of 26.6 ± 4.9 years and body mass index of 23.7 ± 3.5 kg/m(2) reported to the Sleep Disorders Center (the laboratory) on four occasions: (1) adaptation, (2) 4 weeks before Ramadan while performing Islamic intermittent fasting for 1 week (fasting outside Ramadan [FOR]), (3) 1 week before Ramadan (nonfasting baseline [BL]), and (4) during the 2(nd) week of Ramadan while fasting (Ramadan)...
July 2017: Annals of Thoracic Medicine
https://www.readbyqxmd.com/read/28808463/micro-push-out-bond-strength-and-bioactivity-analysis-of-a-bioceramic-root-canal-sealer
#14
Ceci Nunes Carvalho, Renata Grazziotin-Soares, George Táccio de Miranda Candeiro, Luis Gallego Martinez, Juliana Pereira de Souza, Patrícia Santos Oliveira, José Bauer, Giulio Gavini
INTRODUCTION: Bioactive endodontic sealers have been developed to improve the quality of root canal obturation. EndoSequence Bioceramic (BC) Sealer is amongst calcium silicate-based materials recently developed for permanent root canal filling. The objective of this study was to evaluate the bioactivity of BC Sealer and its micro push-out bond strength to dentin compared to AH-Plus (AH) sealer. METHODS AND MATERIALS: To perform the micro push-out test, 24 root canals of mandibular premolars were instrumented and divided into two groups (n=12)...
2017: Iranian Endodontic Journal
https://www.readbyqxmd.com/read/28808259/combination-of-chemical-fingerprint-and-bioactivity-evaluation-to-explore-the-antibacterial-components-of-salvia-miltiorrhizae
#15
Wei-Jun Kong, Shan-Shan Zhang, Yan-Ling Zhao, Ming-Quan Wu, Ping Chen, Xiao-Ru Wu, Xin-Ping Ma, Wei-Ying Guo, Mei-Hua Yang
The aim of this study was to explore the possible antibacterial components of Salvia miltiorrhizae on Pseudomonas aeruginosa using a combination of chemical fingerprint and bioactivity evaluation. The chemical fingerprints of 32 batches of S. miltiorrhizae samples from different sources were developed using high-performance liquid chromatography with diode array detection, and then were evaluated by similarity analysis and hierarchical clustering analysis. Anti-P. aeruginosa activity was determined by microcalorimetry...
August 14, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28807986/a-turbine-driven-ventilator-improves-adherence-to-advanced-cardiac-life-support-guidelines-during-a-cardiopulmonary-resuscitation-simulation
#16
Scott G Allen, Lara Brewer, Erik S Gillis, Nathan L Pace, Derek J Sakata, Joseph A Orr
BACKGROUND: Research has shown that increased breathing frequency during cardiopulmonary resuscitation is inversely correlated with systolic blood pressure. Rescuers often hyperventilate during cardiopulmonary resuscitation (CPR). Current American Heart Association advanced cardiac life support recommends a ventilation rate of 8 -10 breaths/min. We hypothesized that a small, turbine-driven ventilator would allow rescuers to adhere more closely to advanced cardiac life support (ACLS) guidelines...
August 14, 2017: Respiratory Care
https://www.readbyqxmd.com/read/28807922/are-standard-doses-of-piperacillin-in-piperacillin-tazobactam-regimens-adequate-for-the-management-of-febrile-neutropenia-answers-from-population-pharmacokinetic-modelling-and-monte-carlo-simulations
#17
Fekade Bruck Sime, Uwe Hahn, Morgyn S Warner, Ing Soo Tiong, Michael S Roberts, Jeffrey Lipman, Sandra L Peake, Jason A Roberts
Changes in the pharmacokinetics of piperacillin in febrile neutropenic patients have been reported to result in sub-optimal exposures. This study aimed to develop a population pharmacokinetic model for piperacillin and perform dosing simulation to describe optimal dosing regimens for haematological malignancy patients with febrile neutropenia. Concentration-time data were obtained from previous prospective observational pharmacokinetic and interventional therapeutic drug monitoring studies. Non-parametric population pharmacokinetic analysis and Monte Carlo dosing simulations were performed with Pmetrics® package for R...
August 14, 2017: Antimicrobial Agents and Chemotherapy
https://www.readbyqxmd.com/read/28807832/pattern-of-exposure-to-information-and-its-impacts-on-seasonal-influenza-vaccination-uptake-in-nurses
#18
Edward Ka Hin Cheung, Sing Lee, Shui Shan Lee
BACKGROUND: Coverage of annual influenza vaccination of healthcare workers (HCWs) varies and remains at a sub-optimal level in many countries. As HCWs are often exposed to a variety of information on vaccination, their pattern of exposure may impact their decision, which deserves further investigation. METHOD: Practising nurses in Hong Kong were invited to participate in an anonymous online survey in February 2015, after the winter seasonal peak. The questionnaire covered demographics, work nature and experiences, vaccination uptake history and reasons for vaccination decisions...
August 11, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28807684/influence-of-velotron-chainring-size-on-wingate-anaerobic-test
#19
Nicolas W Clark, Dale R Wagner, Edward M Heath
OBJECTIVES: This study compared an 85-tooth versus the standard 62-tooth chainring for power outputs during a Wingate test using a Velotron electromagnetically-braked cycle ergometer. DESIGN: All participants completed trials using both chainring sizes in a repeated-measures cross-over design. METHODS: Resistance-trained male participants (n=20, 24.6±4.5years) performed two Wingate tests separated by at least 48h. Peak power (PP), mean power (MP), fatigue index (FI), peak cadence, mean cadence, and total work (TW) were recorded...
August 2, 2017: Journal of Science and Medicine in Sport
https://www.readbyqxmd.com/read/28807577/a-comparison-of-inflammatory-responses-between-robotically-enhanced-coronary-artery-bypass-grafting-and-conventional-coronary-artery-bypass-grafting-implications-for-hybrid-revascularization
#20
Galina Leyvi, Kumar Vivek, Sankalp Sehgal, Adrienne Warrick, Kea Alexa Moncada, Nancy Shilian, Jonathan D Leff, Robert E Michler, Joseph J DeRose
OBJECTIVE: The inflammatory response elicited by robotically enhanced coronary artery bypass grafting (r-CABG) has not been well described. When r-CABG is performed as part of hybrid coronary revascularization, the inflammatory milieu and the timing of percutaneous coronary intervention may affect the stent patency negatively in the short and long term. The goal of this study was to describe the extent and time course of cytokine release after r-CABG compared with conventional CABG (c-CABG) and to elucidate the optimal timing for r-CABG in the setting of hybrid coronary revascularization for a future study...
April 26, 2017: Journal of Cardiothoracic and Vascular Anesthesia
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