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https://www.readbyqxmd.com/read/28344796/quality-of-colonoscopy-in-an-emerging-country-a-prospective-multicentre-study-in-russia
#1
Mariya Antipova, Mikhail Burdyukov, Mikhail Bykov, Leonid Domarev, Evgeny Fedorov, Sergey Gabriel, Konstantin Glebov, Sergey Kashin, Mikhail Knyazev, Aleksey Korotkevich, Andrey Kotovsky, Irina Kruglova, Vladimir Krushelnitsky, Ekaterina Mayat, Mikhail Merzlyakov, Dmitry Mtvralashvili, Aleksander Pyrkh, Oleg Sannikov, Evgeny Shitikov, Alexander Subbotin, Alexander Taran, Viktor Veselov, Dmitry Zavyalov, Cesare Hassan, Franco Radaelli, Lorenzo Ridola, Alessandro Repici, Mikhail Korolev
BACKGROUND: The quality of colonoscopy has been related to a higher risk of interval cancer, and this issue has been addressed extensively in developed countries. The aim of our study was to explore the main quality indicators of colonoscopy in a large emerging country. METHODS: Consecutive patients referred for colonoscopy in 14 centres were prospectively included between July and October 2014. Before colonoscopy, several clinical and demographic variables were collected...
March 2017: United European Gastroenterology Journal
https://www.readbyqxmd.com/read/28340553/promoting-independence-health-and-well-being-for-older-people-a-feasibility-study-of-computer-aided-health-and-social-risk-appraisal-system-in-primary-care
#2
Kate Walters, Kalpa Kharicha, Claire Goodman, Melanie Handley, Jill Manthorpe, Mima Cattan, Steve Morris, Caroline S Clarke, Jeff Round, Steve Iliffe
BACKGROUND: With population ageing, research is needed into new low-cost, scalable methods of effective promotion of health and wellbeing for older people. We aimed to assess feasibility, reach and costs of implementing a new tailored computer-aided health and social risk appraisal system in primary care. METHODS: Design: Feasibility study. SETTING: Five General Practices in London (Ealing) and Hertfordshire, United Kingdom (UK) Participants: Random sample of patients aged 65 + years...
March 24, 2017: BMC Family Practice
https://www.readbyqxmd.com/read/28340296/ultra-low-surface-recombination-velocity-in-passivated-ingaas-inp-nanopillars
#3
Aura Higuera-Rodriguez, Bruno Romeira, Simone Birindelli, Lachlan E Black, Barry Smalbrugge, Peter J van Veldhoven, Wilhelmus Erwin M M Kessels, Meint K Smit, Andrea Fiore
The III-V semiconductor InGaAs is a key material for photonics since it provides optical emission and absorption in the 1.55 μm telecommunication wavelength window. However, InGaAs suffers from pronounced non-radiative effects associated with its surface states, which affect the performance of nanophotonic devices for optical interconnects, namely nanolasers and nanodetectors. This work reports the strong suppression of surface recombination of undoped InGaAs/InP nanostructured semiconductor pillars using a combination of ammonium sulfide, (NH4)2S, passivation and silicon oxide, SiOx, coating...
March 24, 2017: Nano Letters
https://www.readbyqxmd.com/read/28300145/high-photoresponsivity-ge-dot-photomosfets-for-low-power-monolithically-integrated-si-optical-interconnects
#4
Ming-Hao Kuo, Meng-Chun Lee, Horng-Chih Lin, Tom George, Pei-Wen Li
We report the demonstration of high-photoresponsivity Ge-dot photoMOSFETs in a standard MOS configuration for the detection of 850-1550 nm illumination. Each device has a self-organized, gate-stacking heterostructure of SiO2/Ge-dot/SiO2/SiGe-channel which is simultaneously fabricated in a single oxidation step. Superior control of the geometrical size and chemical composition for our Ge nanodots/SiO2/Si1-xGex-shell MOS structure enables the practically-achievable, gate-stacking design for our Ge-dot photoMOSFETs...
March 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28291608/acute-type-a-aortic-dissection-in-the-united-kingdom-surgeon-volume-outcome-relation
#5
Mohamad Bashir, Amer Harky, Matthew Fok, Matthew Shaw, Graeme L Hickey, Stuart W Grant, Rakesh Uppal, Aung Oo
OBJECTIVES: Surgery for acute type A aortic dissection (ATAD) carries a high risk of operative mortality. We examined the surgeon volume-outcome relation with respect to in-hospital mortality for patients presenting with this pathology in the United Kingdom. METHOD: Between April 2007 and March 2013, 1550 ATAD procedures were identified from the National Institute for Cardiovascular Outcomes Research database. A total of 249 responsible consultant cardiac surgeons from the United Kingdom recorded 1 or more of these procedures in their surgical activity over this period...
February 14, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28287215/investigation-on-the-thermal-effects-of-nayf4-er-under-1550-nm-irradiation
#6
Hong Wang, Xiumei Yin, Mingming Xing, Yao Fu, Ying Tian, Xin Feng, Tao Jiang, Xixian Luo
The thermal effects of NaYF4:Er microcrystals under 1550 nm laser diode irradiation were investigated using an infrared thermal imaging method. The results revealed that the temperature of the LD irradiation beam area was non-uniform. The NaYF4:Er sample exhibits a rapid temperature increase within 5-10 s, and the heating process reaches its steady state after 60 s of irradiation when exposed to 1550 nm LD. The response time, temperature increase, and emission intensity of the samples depend on the excitation power density and concentration of doped Er(3+) ions...
March 13, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28281009/verrucarin-a-and-roridin-e-produced-on-spinach-by-myrothecium-verrucaria-under-different-temperatures-and-co2-levels
#7
Ilenia Siciliano, Pietro Bosio, Giovanna Gilardi, Maria Lodovica Gullino, Angelo Garibaldi
The behavior of Myrothecium verrucaria, artificially inoculated on spinach, was studied under seven different temperature conditions (from 5 to 35 °C) and under eight different combinations of temperature and CO2 concentration (14-30 °C and 775-870 or 1550-1650 mg/m(3)). The isolate used for this study was growing well on spinach, and the mycotoxins verrucarin A and roridin E were produced under all tested temperature and CO2 conditions. The maximum levels of verrucarin A (18.59 ng/g) and roridin E (49...
March 9, 2017: Mycotoxin Research
https://www.readbyqxmd.com/read/28274558/morbidity-and-mortality-prediction-in-pediatric-heart-surgery-physiological-profiles-and-surgical-complexity
#8
John T Berger, Richard Holubkov, Ron Reeder, David L Wessel, Kathleen Meert, Robert A Berg, Michael J Bell, Robert Tamburro, J Michael Dean, Murray M Pollack
OBJECTIVES: Outcome prediction for pediatric heart surgery has focused on mortality but mortality has been significantly reduced over the past 2 decades. Clinical care practices now emphasize reducing morbidity. Physiology-based profiles assessed by the Pediatric Risk of Mortality (PRISM) score are associated with new significant functional morbidity detected at hospital discharge. Our aims were to assess the relationship between new functional morbidity and surgical risk categories (Risk Adjustment for Congenital Heart Surgery [RACHS] and Society for Thoracic Surgery Congenital Heart Surgery Database Mortality Risk [STAT]), measure the performance of 3-level (intact survival, survival with new functional morbidity, or death) and 2-level (survival or death) PRISM prediction algorithms, and assess whether including RACHS or STAT complexity categories improves the PRISM predictive performance...
February 10, 2017: Journal of Thoracic and Cardiovascular Surgery
https://www.readbyqxmd.com/read/28266835/infrared-plasmonics-with-conductive-ternary-nitrides
#9
Chryssoula Metaxa, Spyros Kassavetis, Jean Francois Pierson, D Gall, Panos Patsalas
Conductive transition metal nitrides are emerging as promising alternative plasmonic materials that are refractory and CMOS-compatible. In this work, we show that ternary transition metal nitrides of the B1 structure and consisting of a combination of group-IVb transition metal, such as Ti or Zr, and group III (Sc, Y, Al) or group II (Mg, Ca) elements can have tunable plasmonic activity in the infrared range in contrast to Ta-based ternary nitrides, which exhibit plasmonic performance in the visible and UV ranges...
March 7, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28264676/service-use-of-older-people-who-participate-in-primary-care-health-promotion-a-latent-class-analysis
#10
John A Ford, Kalpa Kharicha, Caroline S Clarke, Allan Clark, Steve Iliffe, Claire Goodman, Jill Manthorpe, Nick Steel, Kate Walters
BACKGROUND: Recruiting patients to health promotion programmes who will benefit is crucial to success. A key policy driver for health promotion in older people is to reduce health and social care use. Our aim was to describe service use among older people taking part in the Multi-dimensional Risk Appraisal for Older people primary care health promotion programme. METHODS: A random sample of 1 in 3 older people (≥65 years old) was invited to participate in the Multi-dimensional Risk Appraisal for Older people project across five general practices in London and Hertfordshire...
March 6, 2017: BMC Health Services Research
https://www.readbyqxmd.com/read/28249505/electro-optic-modulation-of-a-laser-at-microwave-frequencies-for-interferometric-purposes
#11
Paul E Specht, Brook A Jilek
A multi-point microwave interferometer (MPMI) concept was previously proposed by the authors for spatially-resolved, non-invasive tracking of a shock, reaction, or detonation front in energetic media [P. Specht et al., AIP Conf. Proc. 1793, 160010 (2017).]. The advantage of the MPMI concept over current microwave interferometry techniques is its detection of Doppler shifted microwave signals through electro-optic (EO) modulation of a laser. Since EO modulation preserves spatial variations in the Doppler shift, collecting the EO modulated laser light into a fiber array for recording with an optical heterodyne interferometer yields spatially-resolved velocity information...
February 2017: Review of Scientific Instruments
https://www.readbyqxmd.com/read/28241601/slow-light-in-mass-produced-dispersion-engineered-photonic-crystal-ring-resonators
#12
Kathleen McGarvey-Lechable, Tabassom Hamidfar, David Patel, Luhua Xu, David V Plant, Pablo Bianucci
We present experimental results of photonic crystal ring resonators (PhCRRs) fabricated on the CMOS-compatible, silicon-on-insulator platform via 193-nm deep-UV lithography. Our dispersion-engineering design approach is compared to experimental results, showing very good agreement between theory and measurements. Specifically, we report a mean photonic band-edge wavelength of 1546.2 ± 5.8 nm, a 0.2% variation from our targeted band-edge wavelength of 1550 nm. Methods for the direct calculation of the experimental, discrete dispersion relation and extraction of intrinsic quality factors for a highly-dispersive resonator are discussed...
February 20, 2017: Optics Express
https://www.readbyqxmd.com/read/28240245/spectral-compression-of-single-photon-level-laser-pulse
#13
Yuanhua Li, Tong Xiang, Yiyou Nie, Minghuang Sang, Xianfeng Chen
We experimentally demonstrate that the bandwidth of single photons laser pulse is compressed by a factor of 58 in a periodically poled lithium niobate (PPLN) waveguide chip. A positively chirped single photons laser pulse and a negatively chirped classical laser pulse are employed to produce a narrowband single photon pulse with new frequency through sum-frequency generation. In our experiment, the frequency and bandwidth of single photons at 1550 nm are simultaneously converted. Our results mark a critical step towards the realization of coherent photonic interface between quantum communication at 1550 nm and quantum memory in the near-visible window...
February 27, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28230778/caffeic-acid-expands-anti-tumor-effect-of-metformin-in-human-metastatic-cervical-carcinoma-htb-34-cells-implications-of-ampk-activation-and-impairment-of-fatty-acids-de-novo-biosynthesis
#14
Malgorzata Tyszka-Czochara, Pawel Konieczny, Marcin Majka
The efficacy of cancer treatments is often limited and associated with substantial toxicity. Appropriate combination of drug targeting specific mechanisms may regulate metabolism of tumor cells to reduce cancer cell growth and to improve survival. Therefore, we investigated the effects of anti-diabetic drug Metformin (Met) and a natural compound caffeic acid (trans-3,4-dihydroxycinnamic acid, CA) alone and in combination to treat an aggressive metastatic human cervical HTB-34 (ATCC CRL-1550) cancer cell line...
February 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28221297/optimal-epinephrine-concentration-and-time-delay-to-minimize-perfusion-in-eyelid-surgery-measured-by-laser-based-methods-and-a-novel-form-of-extended-wavelength-diffuse-reflectance-spectroscopy
#15
Rafi Sheikh, Ulf Dahlstrand, Khashayar Memarzadeh, Jonas Blohmé, Nina Reistad, Malin Malmsjö
OBJECTIVE: This study investigates the hypoperfusion effects of epinephrine in local anesthesia in eyelid surgery. A novel form of extended-wavelength diffuse reflectance spectroscopy was evaluated. METHODS: Blood perfusion in porcine eyelid flaps was measured using laser Doppler velocimetry and laser speckle contrast imaging, whereas the tissue response was measured using diffuse reflectance spectroscopy with a broad spectrum (450-1550 nm). Epinephrine was either injected cumulatively, 0...
February 17, 2017: Ophthalmic Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28220020/randomized-phase-ii-study-of-ramucirumab-or-icrucumab-in-combination-with-capecitabine-in-patients-with-previously-treated-locally-advanced-or-metastatic-breast-cancer
#16
Linda T Vahdat, Rachel Layman, Denise A Yardley, William Gradishar, Mohamad A Salkeni, Anil Abraham Joy, Agustin A Garcia, Patrick Ward, James Khatcheressian, Joseph Sparano, Gladys Rodriguez, Shande Tang, Ling Gao, Rita P Dalal, John Kauh, Kathy Miller
BACKGROUND: Icrucumab (ICR) and ramucirumab (RAM) bind vascular endothelial growth factor (VEGF) receptors 1 and 2 (VEGFR-1 and -2), respectively. This open-label, randomized phase II study evaluated their efficacy and safety in combination with capecitabine (CAP) in patients with previously treated unresectable, locally advanced or metastatic breast cancer. METHODS: Patients were randomly assigned (1:1:1) to receive CAP (1,000 mg/m(2) orally twice daily, days 1-14) alone or in combination with RAM (10 mg/kg intravenously [IV], days 1 and 8) (RAM + CAP) or ICR (12 mg/kg IV, days 1 and 8) (ICR + CAP) every 21 days...
February 20, 2017: Oncologist
https://www.readbyqxmd.com/read/28218652/steady-%C3%AE-ray-effects-on-the-performance-of-ppp-botda-and-tw-cotdr-fiber-sensing
#17
Isabelle Planes, Sylvain Girard, Aziz Boukenter, Emmanuel Marin, Sylvie Delepine-Lesoille, Claude Marcandella, Youcef Ouerdane
We investigated the evolution of the performances of Pulse Pre Pump-Brillouin Time Domain Analysis (PPP-BOTDA) and Tunable Wavelength Coherent Optical Time Domain Reflectometry (TW-COTDR) fiber-based temperature and strain sensors when the sensing optical fiber is exposed to two γ-ray irradiation conditions: (i) at room temperature and a dose rate of 370 Gy(SiO2)/h up to a total ionizing dose (TID) of 56 kGy; (ii) at room temperature and a dose rate of 25 kGy(SiO2)/h up to a TID of 10 MGy. Two main different classes of single-mode optical fibers have been tested in situ, radiation-tolerant ones: fluorine-doped or nitrogen-doped core fibers, as well as Telecom-grade germanosilicate ones...
February 17, 2017: Sensors
https://www.readbyqxmd.com/read/28210188/non-contact-photoacoustic-imaging-using-a-commercial-heterodyne-interferometer
#18
Chao Tian, Ting Feng, Cheng Wang, Shengchun Liu, Qian Cheng, David E Oliver, Xueding Wang, Guan Xu
Most current photoacoustic imaging (PAI) systems employ piezoelectric transducers to receive photoacoustic signals, which requires coupling medium to facilitate photoacoustic wave propagation and are not favored in many applications. Here, we report an all-optical non-contact PAI system based on a commercial heterodyne interferometer working at 1550 nm. The interferometer remotely detects ultrasound-induced surface vibration and does not involve any physical contact with the sample. The theoretically predicated and experimentally measured noise equivalent detection limits of the optical sensor are about 4...
December 1, 2016: IEEE Sensors Journal
https://www.readbyqxmd.com/read/28191658/interpatient-mutational-spectrum-of-human-coronavirus-oc43-revealed-by-illumina-sequencing
#19
Geoffrey J Gorse, Gira B Patel, Xiaofeng Fan
Human coronaviruses (HCoV) are RNA viruses that cause respiratory tract infections with viral replication of limited duration. The host and viral population heterogeneity could influence clinical phenotypes. Employing long RT-PCR with Illumina sequencing, we quantified the gene mutation load at 0.5% mutation frequency for the 4,529 bp-domain spanning the Spike gene (4,086 bp) of HCoV-OC43 in four upper respiratory clinical specimens obtained during acute illness. There were a total of 121 mutations for all four HCoV samples with the average number of mutations at 30...
February 12, 2017: Journal of Medical Virology
https://www.readbyqxmd.com/read/28187492/are-evidence-standards-different-for-genomic-vs-clinical-based-precision-medicine-a-quantitative-analysis-of-individualized-warfarin-therapy
#20
Devender S Dhanda, Gregory F Guzauskas, Josh J Carlson, Anirban Basu, David L Veenstra
Evidence requirements for implementation of precision medicine (PM), whether informed by genomic or clinical data, are not well defined. Evidence requirements are driven by uncertainty and its attendant consequences; these aspects can be quantified by a novel technique in health economics, value of information analysis (VOI). We utilized VOI analysis to compare the evidence levels over time for warfarin dosing based on pharmacogenomic- vs. amiodarone-warfarin drug-drug interaction information. The primary outcome was the expected value of perfect information (EVPI), which is an estimate of the upper limit of the societal value of conducting future research...
February 10, 2017: Clinical Pharmacology and Therapeutics
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