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https://www.readbyqxmd.com/read/28938553/homocysteine-induced-peripheral-microcirculation-dysfunction-in-zebrafish-and-its-attenuation-by-l-arginine
#1
Sang Joon Lee, Sung Ho Park, Jinhyuk Fred Chung, Woorak Choi, Hyung Kyu Huh
Elevated blood homocysteine (Hcy) level is frequently observed in aged individuals and those with age-related vascular diseases. However, its effect on peripheral microcirculation is still not fully understood. Using in vivo zebrafish model, the degree of Hcy-induced peripheral microcirculation dysfunction is assessed in this study with a proposed dimensionless velocity parameter [Formula: see text], where [Formula: see text] and [Formula: see text] represent the peripheral microcirculation perfusion and the systemic perfusion levels, respectively...
August 29, 2017: Oncotarget
https://www.readbyqxmd.com/read/28938196/sorption-of-uranium-vi-onto-hydrous-ferric-oxide-modified-zeolite-assessment-of-the-effect-of-ph-contact-time-temperature-selected-cations-and-anions-on-sorbent-interactions
#2
Pfano Mathews Nekhunguni, Nikita Tawanda Tavengwa, Hlanganani Tutu
Zeolites are commonly used as adsorbents for metal removal in most applications e.g. in wastewater. However, the ubiquity of iron in such systems may, in the long-term, distort the true interactions and mechanisms of contaminant removal as a result of modification of the zeolite surface. In this study, this potential phenomenon was assessed for the removal of uranium(VI) from aqueous solution by hydrous ferric oxide-modified zeolite (HFOMZ). This was prepared by precipitating iron hydroxide (the common precipitate of iron in aqueous systems) onto zeolite...
September 19, 2017: Journal of Environmental Management
https://www.readbyqxmd.com/read/28938078/online-lactation-education-for-healthcare-providers-a-theoretical-approach-to-understanding-learning-outcomes
#3
Amanda L Watkins, Joan E Dodgson, Darya Bonds McClain
BACKGROUND: Breastfeeding competencies are not standardized in healthcare education for any of the health professions. A few continuing education/professional development programs have been implemented, but research regarding the efficacy of these programs is scarce. Research aim: After a 45-hour lactation course, (a) Does breastfeeding knowledge increase? (b) Do beliefs and attitudes about infant feeding improve? (c) Does perceived behavioral control over performance of evidence-based lactation support practices increase? and (d) Do intentions to carry out evidence-based lactation support practices increase? METHODS: A nonexperimental pretest-posttest self-report survey design was conducted with a nonprobability sample of participants ( N = 71) in a lactation course...
September 1, 2017: Journal of Human Lactation: Official Journal of International Lactation Consultant Association
https://www.readbyqxmd.com/read/28938004/predictive-models-of-objective-oropharyngeal-osa-surgery-outcomes-success-rate-and-ahi-reduction-ratio
#4
Ji Ho Choi, Jae Yong Lee, Jaehyung Cha, Kangwoo Kim, Seung-No Hong, Seung Hoon Lee
OBJECTIVE: The aim of this study was to develop a predictive model of objective oropharyngeal obstructive sleep apnea (OSA) surgery outcomes including success rate and apnea-hypopnea index (AHI) reduction ratio in adult OSA patients. STUDY DESIGN: Retrospective outcome research. METHODS: All subjects with OSA who underwent oropharyngeal and/or nasal surgery and were followed for at least 3 months were enrolled in this study. Demographic, anatomical [tonsil size (TS) and palate-tongue position (PTP) grade (Gr)], and polysomnographic parameters were analyzed...
2017: PloS One
https://www.readbyqxmd.com/read/28937981/cognitive-function-in-patients-with-stable-coronary-heart-disease-related-cerebrovascular-and-cardiovascular-responses
#5
Mathieu Gayda, Vincent Gremeaux, Louis Bherer, Martin Juneau, Joffrey Drigny, Olivier Dupuy, Gabriel Lapierre, Véronique Labelle, Annik Fortier, Anil Nigam
Chronic exercise has been shown to prevent or slow age-related decline in cognitive functions in otherwise healthy, asymptomatic individuals. We sought to assess cognitive function in a stable coronary heart disease (CHD) sample and its relationship to cerebral oxygenation-perfusion, cardiac hemodynamic responses, and [Formula: see text] peak compared to age-matched and young healthy control subjects. Twenty-two young healthy controls (YHC), 20 age-matched old healthy controls (OHC) and 25 patients with stable CHD were recruited...
2017: PloS One
https://www.readbyqxmd.com/read/28937753/facile-substitution-of-bridging-so2-2-ligands-in-re12-bioctahedral-cluster-complexes
#6
Yakov M Gayfulin, Anton I Smolentsev, Svetlana G Kozlova, Igor N Novozhilov, Pavel E Plyusnin, Nikolay B Kompankov, Yuri V Mironov
Selective substitution of μ-SO2(2-) groups by either O(2-) or Se(2-) ions occurs upon heating the bioctahedral rhenium cluster complex K6[Re12CS14(μ-SO2)3(CN)6] in air atmosphere or in the presence of a Se source, respectively, manifesting the remarkable lability of SO2(2-) ligands bound to a transition-metal cluster. A series of compounds based on the new mixed-ligand anions, [Re12CS14(μ-O)3(CN)6](6-), [Re12CS14(μ-Se)3(CN)6](6-), and [Re12CS14(μ-O)3(OH)6](6-), were isolated and their solid-state structures were elucidated by single-crystal X-ray diffraction analysis...
September 22, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28937171/unprecedented-family-of-heterometallic-ln-iii-18-metallacrown-6-complexes-syntheses-structures-and-magnetic-properties
#7
Wei Yang, Hua Yang, Su-Yuan Zeng, Da-Cheng Li, Jian-Min Dou
Herein, a new family of Ln(III)[18-metallacrown-6] compounds with the formula [Fe6O2Ln(tBu-sao)6(OH)(MeO)4(MeOH)(H2O)]·6MeOH [Ln = Dy(III) (1), Tb(III) (2), Gd(III) (3), and Y(III) (4), tBu-saoH2 = 3,5-di-tert-butylsalicylaldoxime] was synthesized through one-pot reactions using tBu-saoH2, Fe(ClO4)3·6H2O, and Ln(NO3)3·6H2O. The four compounds are isostructural, and the encapsulation of a Ln ion in the ring cavity of 18-metallacrown-6 (18-MC-6) was exhibited for the first time. The structural analysis shows a ship-like 18-MC-6 core with a beset lanthanide ion connecting six ring oxygen atoms (OMC)...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28937061/long-term-evaluation-of-kidney-function-in-live-related-kidney-donors
#8
Kalpana S Mehta, Rudramani Swami, Atim Pajai, Sandip Bhurke, Abhishek Shirkande, Sunil Jawle
The consequences of live kidney donation on the donor health with main emphasis on postdonation blood pressure (BP), proteinuria, kidney size, and glomerular filtration rate (GFR) were evaluated. Twenty-five donors with minimum of six months postdonation duration were included in the study. Donor age at nephrectomy, duration postnephrectomy, systolic and diastolic BP measurement pre-and post-donation, postdonation, blood urea nitrogen, serum creatinine and 24-h proteinuria, blood sugar, two-dimensional echocardiogram were recorded...
September 2017: Saudi Journal of Kidney Diseases and Transplantation
https://www.readbyqxmd.com/read/28936989/diffusion-of-interstitials-in-metallic-systems-illustration-of-a-complex-study-case-aluminum
#9
Matthieu David, Damien Connetable
While diffusion mechanisms of interstitial elements in fcc systems are generally well-known, especially in the case of H atoms, we show in this work that even in the case of a simple metallic system (aluminum), the diffusion of interstitials exhibits a wide variety of paths and mechanisms that depend on the specie. We used an approach based on first-principles calculations associated with kinetic Monte-Carlo simulations and a multi-state diffusion formalism to compute the diffusion coefficients of five interstitial elements: hydrogen, boron, carbon, nitrogen and oxygen...
September 22, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28936917/scalable-collaborative-targeted-learning-for-high-dimensional-data
#10
Cheng Ju, Susan Gruber, Samuel D Lendle, Antoine Chambaz, Jessica M Franklin, Richard Wyss, Sebastian Schneeweiss, Mark J van der Laan
Robust inference of a low-dimensional parameter in a large semi-parametric model relies on external estimators of infinite-dimensional features of the distribution of the data. Typically, only one of the latter is optimized for the sake of constructing a well-behaved estimator of the low-dimensional parameter of interest. Optimizing more than one of them for the sake of achieving a better bias-variance trade-off in the estimation of the parameter of interest is the core idea driving the general template of the collaborative targeted minimum loss-based estimation procedure...
January 1, 2017: Statistical Methods in Medical Research
https://www.readbyqxmd.com/read/28936770/a-one-pot-synthesis-of-bis-phenylimino-thiazolidines-from-ketene-n-s-acetals-and-formula-see-text-formula-see-text-diphenyloxalimidoyl-dichloride
#11
Issa Yavari, Nooshin Zahedi, Leila Baoosi, Stavroula Skoulika
A synthesis of functionalized 4,5-bis(phenylimino)-1,3-thiazolidine-2-ylidenes via a simple reaction between ketene [Formula: see text]-acetals (derived from isothiocyanates and acetonitrile derivatives) with N,[Formula: see text]-diphenyloxalimidoyl dichloride in the presence of KOH in DMF is described. When CS[Formula: see text] was used as the heterocumulene component, the reaction led to the formation of 4,5-bis(phenylimino)-1,3-dithiolan-2-ylidene derivatives, in moderate to good yields.
September 21, 2017: Molecular Diversity
https://www.readbyqxmd.com/read/28936627/the-accuracy-of-emergency-weight-estimation-systems-in-children-a-systematic-review-and-meta-analysis
#12
REVIEW
Mike Wells, Lara Nicole Goldstein, Alison Bentley
The safe and effective administration of fluids and medications during the management of medical emergencies in children depends on an appropriately determined dose, based on body weight. Weight can often not be measured in these circumstances and a convenient, quick and accurate method of weight estimation is required. Most methods in current use are not accurate enough, but the newer length-based, habitus-modified (two-dimensional) systems have shown significantly higher accuracy. This meta-analysis evaluated the accuracy of weight estimation systems in children...
September 21, 2017: International Journal of Emergency Medicine
https://www.readbyqxmd.com/read/28936533/small-iron-carbonyl-clusters-bearing-imidazolium-2-trithioperoxycarboxylate-ligands
#13
Tomás F Beltrán, Guillermo Zaragoza, Lionel Delaude
The reaction of [Fe2(CO)9] with two representative imidazolium-2-dithiocarboxylate zwitterions derived from common N-heterocyclic carbenes (NHCs) bearing mesityl (IMes) or 2,6-diisopropylphenyl substituents on their nitrogen atoms (IDip) unexpectedly afforded two small bimetallic iron-carbonyl clusters with the generic formula [Fe2(CO)6(μ-κ(2)-S,S'-κ(2)-S,S'-S3C·NHC)]. After a brief optimization of the reaction conditions, these two "sulfur-enriched" products were isolated in low yields. They were fully characterized by IR, NMR, UV/Visible, and ESI-MS techniques, and their molecular structures were determined by single crystal X-ray diffraction analysis...
September 22, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28936178/a-comparison-of-oral-sensory-effects-of-three-trpa1-agonists-in-young-adult-smokers-and-non-smokers
#14
Eva Ø Hansen, Lars Arendt-Nielsen, Shellie A Boudreau
This study profiled intra-oral somatosensory and vasomotor responses to three different transient receptor potential (TRP) channels, subfamily A, member 1 (TRPA1) agonists (menthol, nicotine, and cinnamaldehyde) in smoking and non-smoking young adults. Healthy non-smokers (N = 30) and otherwise healthy smokers (N = 25) participated in a randomized, double-blinded, cross-over study consisting of three experimental sessions in which they received menthol (30 mg), nicotine (4 mg), or cinnamaldehyde (25 mg) chewing gum...
2017: Frontiers in Physiology
https://www.readbyqxmd.com/read/28936035/a-cephalometric-analysis-of-class-ii-dentate-subjects-to-establish-a-formula-to-determine-the-occlusal-plane-in-class-ii-edentate-subjects-a-neo-adjunct
#15
Nikita Sinha, K Mahendranadh Reddy, Nidhi Gupta, Y M Shastry
PURPOSE: Occlusal plane (OP) differs considerably in participants with skeletal Class I and Class II participants. In this study, cephalometrics has been used to help in the determination of orientation of the OP utilizing the nonresorbable bony anatomic landmarks in skeletal Class II participants and an attempt has been made to predict and examine the OP in individuals with skeletal class II jaw relationship. MATERIALS AND METHODS: One hundred dentulous participants with skeletal Class II malocclusion who came to the hospital for correcting their jaw relationship participated in the study...
July 2017: Journal of Indian Prosthodontic Society
https://www.readbyqxmd.com/read/28935995/ray-tracing-and-modal-methods-for-modeling-radio-propagation-in-tunnels-with-rough-walls
#16
Chenming Zhou
At the ultrahigh frequencies common to portable radios, tunnels such as mine entries are often modeled by hollow dielectric waveguides. The roughness condition of the tunnel walls has an influence on radio propagation, and therefore should be taken into account when an accurate power prediction is needed. This paper investigates how wall roughness affects radio propagation in tunnels, and presents a unified ray tracing and modal method for modeling radio propagation in tunnels with rough walls. First, general analytical formulas for modeling the influence of the wall roughness are derived, based on the modal method and the ray tracing method, respectively...
May 2017: IEEE Transactions on Antennas and Propagation
https://www.readbyqxmd.com/read/28935973/scaling-of-memories-and-crossover-in-glassy-magnets
#17
A M Samarakoon, M Takahashi, D Zhang, J Yang, N Katayama, R Sinclair, H D Zhou, S O Diallo, G Ehlers, D A Tennant, S Wakimoto, K Yamada, G-W Chern, T J Sato, S-H Lee
Glassiness is ubiquitous and diverse in characteristics in nature. Understanding their differences and classification remains a major scientific challenge. Here, we show that scaling of magnetic memories with time can be used to classify magnetic glassy materials into two distinct classes. The systems studied are high temperature superconductor-related materials, spin-orbit Mott insulators, frustrated magnets, and dilute magnetic alloys. Our bulk magnetization measurements reveal that most densely populated magnets exhibit similar memory behavior characterized by a relaxation exponent of [Formula: see text]...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935877/a-tight-binding-and-formula-see-text-study-of-monolayer-stanene
#18
Liming Jiang, Paolo Marconcini, Md Sharafat Hossian, Wanzhi Qiu, Robin Evans, Massimo Macucci, Efstratios Skafidas
Stanene is a single layer of tin atoms which has been discovered as an emerging material for quantum spin Hall related applications. In this paper, we present an accurate tight-binding model for single layer stanene near the Fermi level. We parameterized the onsite and hopping energies for the nearest, second nearest, and third nearest neighbor tight-binding method, both without and with spin orbital coupling. We derived the analytical solution for the [Formula: see text]and [Formula: see text] points and numerically investigated the buckling effect on the material electronic properties...
September 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28935800/observation-of-a-large-scale-anisotropy-in-the-arrival-directions-of-cosmic-rays-above-8-%C3%A3-10-18-ev
#19
(no author information available yet)
Cosmic rays are atomic nuclei arriving from outer space that reach the highest energies observed in nature. Clues to their origin come from studying the distribution of their arrival directions. Using 3 × 10(4) cosmic rays with energies above 8 × 10(18) electron volts, recorded with the Pierre Auger Observatory from a total exposure of 76,800 km(2) sr year, we determined the existence of anisotropy in arrival directions. The anisotropy, detected at more than a 5.2σ level of significance, can be described by a dipole with an amplitude of [Formula: see text] percent toward right ascension αd = 100 ± 10 degrees and declination δd = [Formula: see text] degrees...
September 22, 2017: Science
https://www.readbyqxmd.com/read/28934956/parameters-sensitivity-assessment-and-heat-source-localization-using-infrared-imaging-techniques
#20
Maryam Rastgar-Jazi, Farah Mohammadi
BACKGROUND: At present, infrared (IR) imaging is used both as a non-invasive and a non-ionizing technology. Using an IR camera, it is possible to measure body surface temperature in order to detect tumors and malignant cells. Tumors have a high amount of vasculature and an enhanced metabolism rate, which may result in an increase in body surface temperature by several degrees above its normal level. METHODS: Using thermograms, it is possible to assess various tumor parameters, such as depth, intensity, and radius...
September 21, 2017: Biomedical Engineering Online
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