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https://www.readbyqxmd.com/read/28538925/diet-and-body-fat-in-adolescence-and-early-adulthood-a-systematic-review-of-longitudinal-studies
#1
Bruna Celestino Schneider, Samuel Carvalho Dumith, Silvana Paiva Orlandi, Maria Cecília Formoso Assunção
Adipose tissue is a vital component of the human body, but in excess, it represents a risk to health. According to the World Health Organization, one of the main factors determining excessive body adiposity is the dietary habit. This systematic review investigated longitudinal studies that assessed the association between diet and body fat in adolescents and young adults. Twenty-one relevant papers published between 2001 and 2015 were selected. The most used method for estimating body fat was the body mass index (15 studies)...
May 2017: Ciência & Saúde Coletiva
https://www.readbyqxmd.com/read/28538453/does-concurrent-tibial-intramedullary-nailing-and-fibular-fixation-increase-rates-of-tibial-nonunion-a-matched-cohort-study
#2
Michael Githens, Justin Haller, Julie Agel, Reza Firoozabadi
OBJECTIVES: To determine if there is a difference in rates of tibial nonunion in patients undergoing tibial intramedullary (IM) nailing and fibular fixation as compared to a matched cohort undergoing tibial IM nailing alone. DESIGN: Retrospective matched cohort study. SETTING: Single Level 1 academic trauma center. PATIENTS: Consecutive patients 18 years and older with a tibia and fibula fracture treated with tibial IM nailing and fibular fixation who were determined radiographically and clinically healed or had a minimum 1-year follow-up were included...
June 2017: Journal of Orthopaedic Trauma
https://www.readbyqxmd.com/read/28538206/spectroscopic-far-or-terahertz-mid-infrared-and-raman-investigation-thermal-analysis-and-biological-activity-of-piplartine
#3
Anubha Srivastava, T Karthick, B D Joshi, Rashmi Mishra, Poonam Tandon, A P Ayala, Javier Ellena
Research in the field of medicinal plants including Piper species like long pepper (Piper longum L.- Piperaceae) is increasing all over the world due to its use in traditional and Ayurvedic medicine. Piplartine (piperlongumine, 5,6-dihydro-1-[(2E)-1-oxo-3-(3,4,5-trimethoxyphenyl)-2-propenyl]-2(1H)-pyridinone), a biologically active alkaloid/amide was isolated from the phytochemical investigations of Piper species, as long pepper. This alkaloid has cytotoxic, anti-fungal, anti-diabetic, anti-platelet aggregation, anti-tumoral, anxiolytic, anti-depressant, anti-leishmanial, and genotoxic activities, but, its anticancer property is the most promising and has been widely explored...
May 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28538105/linezolid-induced-lactic-acidosis-the-thin-line-between-bacterial-and-mitochondrial-ribosomes
#4
Alessandro Santini, Dario Ronchi, Manuela Garbellini, Daniela Piga, Alessandro Protti
Introduction - Linezolid inhibits bacterial growth by targeting bacterial ribosomes and by interfering with bacterial protein synthesis. Lactic acidosis is a rare, but potentially lethal, side effect of linezolid. Areas covered - The pathogenesis of linezolid-induced lactic acidosis is reviewed with special emphasis on aspects relevant to the recognition, prevention and treatment of the syndrome. Expert opinion - Linezolid-induced lactic acidosis reflects the untoward interaction between the drug and mitochondrial ribosomes...
May 24, 2017: Expert Opinion on Drug Safety
https://www.readbyqxmd.com/read/28537713/site-occupancy-preference-and-antithermal-quenching-of-the-bi-2-deep-red-emission-in-%C3%AE-ca2p2o7-bi-2
#5
Liyi Li, Jiangkun Cao, Bruno Viana, Shanhui Xu, Mingying Peng
The resistance to thermal quenching is an essential factor in evaluating the performance of luminescent materials for application in white light emitting diodes (WLEDs). In this work, we studied the site occupancy preference and thermal quenching of luminescence in β-Ca2P2O7:Bi(2+) red phosphor at low (10-300 K) and high temperatures (303-573 K). In β-Ca2P2O7, the host lattice has four different calcium sites, at which Bi(2+)dopant can be located. After comparing the change of bond energy when the Bi(2+) ions are incorporated into the four calcium sites, we found out that Bi(2+) would preferentially occupy the smaller energy variation sites Ci(2) and Ci(1) in this compound, which can be assigned to Bi(2) and Bi(1), respectively...
May 24, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28535416/the-role-of-timing-in-the-treatment-of-spinal-cord-injury
#6
REVIEW
Amene Saghazadeh, Nima Rezaei
Regeneration failure after primary spinal cord injury (SCI) leads to diverse clinical complications in a severity- and level of SCI-dependent manner. The cost of treating both of them (initial regeneration failure and following complications) would be prohibitive, particularly in less developed nations. The well-recognized circumstances arose from primary SCI include excitotoxicity and inflammation. SCI increases concentrations of extracellular amino acids (EAAs) in the severity-dependent manner and the maximum level of EAAs at the injury site will be reduced by distance from the injury site...
May 20, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28535356/one-dimensional-carrier-confinement-in-giant-cds-cdse-excitonic-nanoshells
#7
Natalia Razgoniaeva, Pavel Moroz, Mingrui Yang, Darya S Budkina, Holly Eckard, Marissa Augspurger, Dmitriy Khon, Alexander N Tarnovsky, Mikhail Zamkov
The emerging generation of quantum dot optoelectronic devices offers an appealing prospect of a size-tunable band gap. The confinement-enabled control over electronic properties, however, requires nanoparticles to be sufficiently small, which leads to a large area of inter-particle boundaries in a film. Such interfaces lead to a high density of surface traps which ultimately increase the electrical resistance of a solid. To address this issue, we have developed an inverse energy-gradient core/shell architecture supporting the quantum confinement in nanoparticles larger than the exciton Bohr radius...
May 23, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28535338/a-flexible-lithium-ion-fiber-battery-by-regularly-stacking-two-dimensional-titanium-oxide-nanosheets-hybridized-with-reduced-graphene-oxide
#8
Tatsumasa Hoshide, Yuanchuan Zheng, Junyu Hou, Zhiqiang Wang, Qingwen Li, Zhigang Zhao, Renzhi Ma, Takayoshi Sasaki, Fengxia Geng
Increasing interest has recently been devoted to developing small, rapid, and portable electronic devices; thus, it is becoming critically important to provide matching light and flexible energy-storage systems to power them. To this end, compared with the inevitable drawbacks of being bulky, heavy, and rigid for traditional planar sandwiched structures, linear fiber-shaped lithium-ion batteries (LIB) have become increasingly important owing to their combined superiorities of miniaturization, adaptability, and weavability, the progress of which is heavily dependent on developing new fiber-shaped electrodes...
May 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28535125/preparation-and-characterization-of-adefovir-dipivoxil-stearic-acid-cocrystal-with-enhanced-physicochemical-properties
#9
Jeong-Woong Seo, Kyu-Min Hwang, Sung-Hoon Lee, Dong-Wook Kim, Eun-Seok Park
The objectives of this study were to prepare cocrystal composed of adefovir dipivoxil (AD) and stearic acid (SA) and to investigate the enhanced properties of the cocrystal. The cocrystal was prepared by antisolvent precipitation and characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), X-ray powder diffraction (XRPD), and differential scanning calorimetry (DSC). The enhanced properties were evaluated by dissolution testing, permeability studies, and powder rheology analysis...
May 23, 2017: Pharmaceutical Development and Technology
https://www.readbyqxmd.com/read/28535124/serum-creatinine-and-cystatin-c-provide-conflicting-evidence-of-acute-kidney-injury-following-acute-ingestion-of-potassium-permanganate-and-oxalic-acid
#10
Thilini Madushanka Wijerathna, Indika Bandara Gawarammana, Dhammika Menike Dissanayaka, Chathura Palanagasinghe, Fathima Shihana, Gihani Dassanayaka, Seyed Shahmy, Zoltan Huba Endre, Fahim Mohamed, Nicholas Alan Buckley
AIM: Acute kidney injury (AKI) is common following deliberate self-poisoning with a combination washing powder containing oxalic acid (H2C2O4) and potassium permanganate (KMnO4). Early and rapid increases in serum creatinine (sCr) follow severe poisoning. We investigated the relationship of these increases with direct nephrotoxicity in an ongoing multicenter prospective cohort study in Sri Lanka exploring AKI following poisoning. METHODS: Multiple measures of change in kidney function were evaluated in 48 consenting patients who had serial sCr and serum cystatin C (sCysC) data available...
May 23, 2017: Clinical Toxicology
https://www.readbyqxmd.com/read/28535030/sulfonated-holey-graphene-oxide-shgo-filled-sulfonated-poly-ether-ether-ketone-membrane-the-role-of-holes-in-the-shgo-in-improving-its-performance-as-proton-exchange-membrane-for-direct-methanol-fuel-cells
#11
Zhong-Jie Jiang, Zhongqing Jiang, Xiaoning Na Tian, Lijuan Luo, Meilin Liu
Sulfonated holey graphene oxides (SHGOs) have synthesized by the etching of sulfonated graphene oxides with concentrated HNO3 under the assistance of ultrasonication. These SHGOs could be used as the fillers for the sulfonated aromatic poly(ether ether ketone) (SPEEK) membrane. The obtained SHGO incorporated SPEEK membrane has a uniform and dense structure, exhibiting the higher performance as proton exchange membranes (PEMs), for instance, higher proton conductivity, lower activation energy for proton conduction, and comparable methanol permeability, as compared to Nafion® 112...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28534919/solid-state-and-surface-effects-in-thin-film-molecular-switches
#12
Jonathan P Hopwood, Jacob W Ciszek
Thin-films of three dihydroindolizine molecular switches were monitored via polarization modulation infrared reflection absorption spectroscopy to quantify solid state and surface-based inhibition of switching as a function of irradiation time. In the solid state, the molecular switches diverged dramatically with flexible alkyl substituents resulting in switching rates up to three times that of switches containing rigid analogs. For thin-films, decreasing film thickness from 30 nm to approximately 4 molecules thick resulted in an increase in inhibition...
May 23, 2017: Photochemical & Photobiological Sciences
https://www.readbyqxmd.com/read/28534900/interplay-between-many-body-effects-and-coulomb-screening-in-the-optical-bandgap-of-atomically-thin-mos2
#13
Youngsin Park, Sang Wook Han, Christopher C S Chan, Benjamin P L Reid, Robert A Taylor, Nammee Kim, Yongcheol Jo, Hyunsik Im, Kwang S Kim
Due to its unique layer-number dependent electronic band structure and strong excitonic features, atomically thin MoS2 is an ideal 2D system where intriguing photoexcited-carrier-induced phenomena can be detected in excitonic luminescence. We perform micro-photoluminescence (PL) measurements and observe that the PL peak redshifts nonlinearly in mono- and bi-layer MoS2 as the excitation power is increased. The excited carrier-induced optical bandgap shrinkage is found to be proportional to n(4/3), where n is the optically-induced free carrier density...
May 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28534730/big-stimulus-little-ears-safety-in-administering-vestibular-evoked-myogenic-potentials-in-children
#14
Megan L A Thomas, Denis Fitzpatrick, Ryan McCreery, Kristen L Janky
BACKGROUND: Cervical and ocular vestibular-evoked myogenic potentials (VEMPs) have become common clinical vestibular assessments. However, VEMP testing requires high intensity stimuli, raising concerns regarding safety with children, where sound pressure levels may be higher due to their smaller ear canal volumes. PURPOSE: The purpose of this study was to estimate the range of peak-to-peak equivalent sound pressure levels (peSPLs) in child and adult ears in response to high intensity stimuli (i...
May 2017: Journal of the American Academy of Audiology
https://www.readbyqxmd.com/read/28534703/chlorhexidine-and-silver-sulfadiazine-coating-on-central-venous-catheters-is-not-sufficient-for-protection-against-catheter-related-infection-simulation-based-laboratory-research-with-clinical-validation
#15
Yoon Ji Choi, Jae Kwan Lim, Jeong Jun Park, Hyub Huh, Dong-Joo Kim, Chang-Hoon Gong, Seung Zhoo Yoon
Objective The efficacy of chlorhexidine- and silver sulfadiazine-coated central venous catheters (CSS-CVC) against catheter-related infection remains controversial. We hypothesized that the loss of silver nanoparticles may reduce the antibacterial efficacy of CSS-CVCs and that this loss could be due to the frictional force between the surface of the CVC and the bloodstream. The objective of this study was to investigate whether the antimicrobial effect of CSS-CVCs decreases with increasing exposure time in a bloodstream model and quantitatively assay the antimicrobial effect of CSS-CVCs compared with polyurethane and antiseptic-impregnated CVCs...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28534658/dynamic-brain-glucose-metabolism-identifies-anti-correlated-cortical-cerebellar-networks-at-rest
#16
Dardo G Tomasi, Ehsan Shokri-Kojori, Corinde E Wiers, Sunny W Kim, Şukru B Demiral, Elizabeth A Cabrera, Elsa Lindgren, Gregg Miller, Gene-Jack Wang, Nora D Volkow
It remains unclear whether resting state functional magnetic resonance imaging (rfMRI) networks are associated with underlying synchrony in energy demand, as measured by dynamic 2-deoxy-2-[(18)F]fluoroglucose (FDG) positron emission tomography (PET). We measured absolute glucose metabolism, temporal metabolic connectivity (t-MC) and rfMRI patterns in 53 healthy participants at rest. Twenty-two rfMRI networks emerged from group independent component analysis (gICA). In contrast, only two anti-correlated t-MC emerged from FDG-PET time series using gICA or seed-voxel correlations; one included frontal, parietal and temporal cortices, the other included the cerebellum and medial temporal regions...
January 1, 2017: Journal of Cerebral Blood Flow and Metabolism
https://www.readbyqxmd.com/read/28534627/highly-stable-and-regenerative-metal-organic-framework-designed-by-multi-walled-divider-installation-strategy-for-detection-of-co-%C3%AE-%C3%AE-ions-and-organic-aromatics-in-water
#17
Kai Xing, Ruiqing Fan, Jiaqi Wang, Siqi Zhang, Kai Feng, Xi Du, Yang Song, Ping Wang, Yulin Yang
MOF-based sensors capable of effectively and stably detecting toxic species in water have attracted huge attention in terms of improving environmental monitoring levels and water quality. Combining the flexibility of structure and modifying of pore surface, a multi-walled divider installation (MWDI) strategy is proposed and used for property enhancement. We herein report three metal-organic frameworks (MOFs) 1-3 based on a C3 symmetry organic phosphonic ligand with topology increased from 3,6-connected to 3,8-connected...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28534621/spectral-response-of-plasmonic-gold-nanoparticles-to-capacitive-charging-morphology-effects
#18
Benjamin S Hoener, Hui Zhang, Thomas S Heiderscheit, Silke R Kirchner, Agampodi Swarnapali De Silva Indrasekara, Rashad Baiyasi, Yi-Yu Cai, Peter Nordlander, Stephan Link, Christy F Landes, Wei-Shun Chang
We report a study of the shape-dependent spectral response of the gold nanoparticle surface plasmon resonance at various electron densities to provide mechanistic insight into the role of capacitive charging, a topic of some debate. We demonstrate a morphology dependent spectral response for gold nanoparticles due to capacitive charging using single-particle spectroscopy in an inert electrochemical environment. A decrease in plasmon energy and increase in spectral width for gold nanospheres and nanorods was observed as the electron density was tuned through a potential window of -0...
May 23, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28534620/hydrogen-atom-transfer-hat-processes-promoted-by-the-quinolinimide-n-oxyl-radical-a-kinetic-and-theoretical-study
#19
Gino A DiLabio, Paola Franchi, Osvaldo Lanzalunga, Andrea Lapi, Fiorella Lucarini, Marco Lucarini, Marco Mazzonna, Viki Kumar Prasad, Barbara Ticconi
A kinetic study of the hydrogen atom transfer (HAT) reactions from a series of organic compounds to the quinolinimide-N-oxyl radical (QINO) has been carried out in CH3CN. The HAT rate constants are significantly higher than those observed with the phthalimide-N-oxyl radical (PINO) as a result of enthalpic and polar effects due to the presence of the N-heteroaromatic ring in QINO. The relevance of polar effects is supported by theoretical calculations carried out for the reactions of the two N-oxyl radicals with toluene which indicate that the HAT process is characterized by a significant degree of charge transfer enabled by the pi-stacking that occurs in the transition state structures between the toluene and the N-oxyl aromatic rings...
May 23, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28534592/thermo-electrochemical-cells-for-waste-heat-harvesting-progress-and-perspectives
#20
M F Dupont, D R MacFarlane, J M Pringle
Thermo-electrochemical cells (also called thermocells) are promising devices for harvesting waste heat for the sustainable production of energy. Research into thermocells has increased significantly in recent years, driven by advantages such as their ability to continuously convert heat into electrical energy without producing emissions or consuming materials. Until relatively recently, the commercial viability of thermocells was limited by their low power output and conversion efficiency. However, there have lately been significant advances in thermocell performance as a result of improvements to the electrode materials, electrolyte and redox chemistry and various features of the cell design...
May 23, 2017: Chemical Communications: Chem Comm
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