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https://www.readbyqxmd.com/read/28526620/evidence-for-cortical-structural-plasticity-in-humans-after-a-day-of-waking-and-sleep-deprivation
#1
Torbjørn Elvsåshagen, Nathalia Zak, Linn B Norbom, Per Ø Pedersen, Sophia H Quraishi, Atle Bjørnerud, Dag Alnæs, Nhat Trung Doan, Ulrik F Malt, Inge R Groote, Lars T Westlye
Sleep is an evolutionarily conserved process required for human health and functioning. Insufficient sleep causes impairments across cognitive domains, and sleep deprivation can have rapid antidepressive effects in mood disorders. However, the neurobiological effects of waking and sleep are not well understood. Recently, animal studies indicated that waking and sleep are associated with substantial cortical structural plasticity. Here, we hypothesized that structural plasticity can be observed after a day of waking and sleep deprivation in the human cerebral cortex...
May 16, 2017: NeuroImage
https://www.readbyqxmd.com/read/28501156/broadcasting-photonic-lab-on-a-chip-concept-through-a-low-cost-manufacturing-approach
#2
Isaac Rodríguez-Ruiz, Sébastien Teychené, Nhat Van Pham, Dimitri Radajewski, Fabrice Lamadie, Andreu Llobera, Sophie Charton
A low cost fabrication process for photonic lab on a chip systems is here proposed. For the implementation of the masters suitable for cast molding fabrication, an inexpensive dry film photoresist, patternable using standard laboratory equipment, is benchmarked against standardized SU-8 masters obtained using UV lithography and systems manufacture in clean room facilities. Results show adequate system fabrication and a comparable performance of the photonic structures for absorbance/extinction measurements.
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28482268/the-role-of-the-environment-in-falls-among-stroke-survivors
#3
Jeffrey J Wing, James F Burke, Philippa J Clarke, Chunyang Feng, Lesli E Skolarus
BACKGROUND: Stroke survivors' risk of falls may be particularly sensitive to the environment due to deficits such as visuospatial neglect or homonymous hemianopia. We sought to identify the prevalence of falls among stroke survivors and investigate the possible role of the environment in falling. MATERIALS AND METHODS: Data from the National Health and Aging Trends Study (NHATS), a nationally representative population of community-dwelling adults over 65, were used...
May 1, 2017: Archives of Gerontology and Geriatrics
https://www.readbyqxmd.com/read/28480746/subjective-age-and-sleep-in-middle-aged-and-older-adults
#4
Yannick Stephan, Angelina R Sutin, Sophie Bayard, Antonio Terracciano
OBJECTIVE: Chronological age is commonly used to explain change in sleep. The present study examines whether subjective age is associated with change in sleep difficulties across middle adulthood and old age. DESIGN: Participants were drawn from the second (2004-2005) and third (2013-2014) waves of the Midlife in the United States Survey (MIDUS, N = 2350; Mean Age: 55.54 years), the 2008 and 2014 waves of the Health and Retirement Study (HRS, N = 4066; Mean Age: 67...
May 8, 2017: Psychology & Health
https://www.readbyqxmd.com/read/28476092/feasibility-of-transdermal-delivery-of-cyclosporine-a-using-plasma-discharges
#5
Jaroslav Kristof, Hideto Miyamoto, An Nhat Tran, Marius Blajan, Kazuo Shimizu
A study of the transdermal delivery of Cyclosporine A by atmospheric plasma irradiation was realized on the epidermal layer of the Hairless Yucatan micropig. Drug flux and the amount of drug penetrated through the skin were determined by a Franz cell diffusion experiment. After treatment of the skin by atmospheric plasma jet or microplasma dielectric barrier discharge, an increase in the permeability of the skin was observed. The authors did not observe drug penetration for samples that were not treated with plasma...
May 4, 2017: Biointerphases
https://www.readbyqxmd.com/read/28465165/chlorin-e6-conjugated-copper-sulfide-nanoparticles-for-photodynamic-combined-photothermal-therapy
#6
Subramaniyan Bharathiraja, Panchanathan Manivasagan, Madhappan Santha Moorthy, Nhat Quang Bui, Kang Dae Lee, Junghwan Oh
The photo-based therapeutic approaches have attracted tremendous attention in recent years especially in treatment and management of tumors. Photodynamic and photothermal are two major therapeutic modalities which are being applied in clinical therapy. The development of nanomaterials for photodynamic combined photothermal therapy has gained significant attention for its treatment efficacy. In the present study, we designed chlorin e6 (Ce6) conjugated copper sulfide (CuS) nanoparticles (CuS-Ce6 NPs) through amine functionalization and the synthesized nanoparticles act as a dual-model agent for photodynamic therapy and photothermal therapy...
April 29, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28444556/thalamo-cortical-functional-connectivity-in-schizophrenia-and-bipolar-disorder
#7
Kristina C Skåtun, Tobias Kaufmann, Christine L Brandt, Nhat Trung Doan, Dag Alnæs, Siren Tønnesen, Guido Biele, Anja Vaskinn, Ingrid Melle, Ingrid Agartz, Ole A Andreassen, Lars T Westlye
The thalamus is a highly connected subcortical structure that relays and integrates sensory and cortical information, which is critical for coherent and accurate perceptual awareness and cognition. Thalamic dysfunction is a classical finding in schizophrenia (SZ), and resting-state functional MRI has implicated somatomotor and frontal lobe thalamic dysconnectivity. However, it remains unclear whether these findings generalize to different psychotic disorders, are confined to specific thalamic sub-regions, and how they relate to structural thalamic alterations...
April 25, 2017: Brain Imaging and Behavior
https://www.readbyqxmd.com/read/28437588/ehanced-solar-water-splitting-by-swift-charge-separation-in-au-feooh-sandwiched-single-crystalline-fe2o3-nanoflake-photoelectrodes
#8
Lei Wang, Nhat Truong Nguyen, Yajun Zhang, Yingpu Bi, Patrik Schmuki
In this work, single crystalline α-Fe2O3 nanoflakes (NFs) are formed in a highly dense array by Au seeding of a Fe substrate by a thermal oxidation technique. The NFs are conformally decorated with a thin FeOOH cocatalyst layer. Photoelectrochemical (PEC) measurements show that this photoanode with the α-Fe2O3/FeOOH NFs rooted on the Au/Fe structure exhibits a significantly enhanced PEC water oxidation performance compared to the plain α-Fe2O3 nanostructure on the Fe substrate. The α-Fe2O3/FeOOH NFs on Au/Fe photoanode yields a photocurrent density of 3...
April 24, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28427400/monitoring-mandibular-movements-to-detect-cheyne-stokes-breathing
#9
Jean-Benoît Martinot, Jean-Christian Borel, Nhat-Nam Le-Dong, Hervé Jean-Pierre Guénard, Valerie Cuthbert, Philip E Silkoff, David Gozal, Jean-Louis Pepin
BACKGROUND: The patterns of mandibular movements (MM) during sleep can be used to identify increased respiratory effort periodic large-amplitude MM (LPM), and cortical arousals associated with "sharp" large-amplitude MM (SPM). We hypothesized that Cheyne Stokes breathing (CSB) may be identified by periodic abnormal MM patterns. The present study aims to evaluate prospectively the concordance between CSB detected by periodic MM and polysomnography (PSG) as gold-standard. The present study aims to evaluate prospectively the concordance between CSB detected by periodic MM and polysomnography (PSG) as gold-standard...
April 20, 2017: Respiratory Research
https://www.readbyqxmd.com/read/28398243/neonatal-citrulline-supplementation-and-later-exposure-to-a-high-fructose-diet-in-rats-born-with-a-low-birth-weight-a-preliminary-report
#10
Nhat-Thang Tran, Marie-Cécile Alexandre-Gouabau, Anthony Pagniez, Khadija Ouguerram, Clair-Yves Boquien, Norbert Winer, Dominique Darmaun
A low birth weight (LBW) leads to a higher risk of metabolic syndrome in adulthood. Literature suggests that citrulline supplementation in adulthood prevents the effect of a high fructose diet on energy metabolism. Whether neonatal citrulline supplementation would alter early growth or energy metabolism in the long-term in rats with LBW is unknown. LBW pups born from dams fed a low (4%) protein diet, were nursed by normally-fed dams and received isonitrogenous supplements of either l-citrulline or l-alanine by gavage from the sixth day of life until weaning, and were subsequently exposed to 10%-fructose in drinking water from weaning to 90 days of age...
April 11, 2017: Nutrients
https://www.readbyqxmd.com/read/28356764/study-of-nasal-exhaled-nitric-oxide-levels-in-diagnosis-of-allergic-rhinitis-in-subjects-with-and-without-asthma
#11
Sy Duong-Quy, Thuc Vu-Minh, Thong Hua-Huy, Tram Tang-Thi-Thao, Khiet Le-Quang, Dinh Tran-Thanh, Nhu Doan-Thi-Quynh, Nhat-Nam Le-Dong, Timothy J Craig, Anh-Tuan Dinh-Xuan
BACKGROUND: The measure of fractional exhaled nitric oxide (FENO) in the airways is a useful tool to guide the diagnosis and titration of inhaled corticosteroids in patients with asthma. However, its role in diagnosis of allergic rhinitis (AR), especially in subjects with asthma, is not well established. OBJECTIVE: To study the cutoff of nasal FENO in the diagnosis of subjects with AR and AR-asthma compared to age-matched subjects without AR or asthma and its correlations with the clinical and functional characteristics...
2017: Journal of Asthma and Allergy
https://www.readbyqxmd.com/read/28338052/dissociable-diffusion-mri-patterns-of-white-matter-microstructure-and-connectivity-in-alzheimer-s-disease-spectrum
#12
Nhat Trung Doan, Andreas Engvig, Karin Persson, Dag Alnæs, Tobias Kaufmann, Jaroslav Rokicki, Aldo Córdova-Palomera, Torgeir Moberget, Anne Brækhus, Maria Lage Barca, Knut Engedal, Ole A Andreassen, Geir Selbæk, Lars T Westlye
Recent efforts using diffusion tensor imaging (DTI) have documented white matter (WM) alterations in Alzheimer's disease (AD). The full potential of whole-brain DTI, however, has not been fully exploited as studies have focused on individual microstructural indices independently. In patients with AD (n = 79), mild (MCI, n = 55) and subjective (SCI, n = 30) cognitive impairment, we applied linked independent component analysis (LICA) to model inter-subject variability across five complementary DTI measures (fractional anisotropy (FA), axial/radial/mean diffusivity, diffusion tensor mode), two crossing fiber measures estimated using a multi-compartment crossing-fiber model reflecting the volume fraction of the dominant (f1) and non-dominant (f2) diffusion orientation, and finally, connectivity density obtained from full-brain probabilistic tractography...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28335206/cytotoxic-induction-and-photoacoustic-imaging-of-breast-cancer-cells-using-astaxanthin-reduced-gold-nanoparticles
#13
Subramaniyan Bharathiraja, Panchanathan Manivasagan, Nhat Quang Bui, Yun-Ok Oh, In Gweon Lim, Suhyun Park, Junghwan Oh
Astaxanthin, a kind of photosynthetic pigment, was employed for gold nanoparticle formation. Nanoparticles were characterized using Ulteraviolet-Visible (UV-Vis) spectroscopy, transmission electron microscopy, and X-ray diffraction, and the possible presence of astaxanthin functional groups were analyzed by Fourier transform infrared spectroscopy (FTIR). The cytotoxic effect of synthesized nanoparticles was evaluated against MDA-MB-231 (human breast cancer cells) using a tetrazolium-based assay, and synthesized nanoparticles exhibited dose-dependent toxicity...
April 20, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28334664/high-rate-nitrogen-removal-by-anammox-internal-circulation-reactor-ic-for-old-landfill-leachate-treatment
#14
The Nhat Phan, Thi Thanh Van Truong, Nhu Biec Ha, Phuoc Dan Nguyen, Xuan Thanh Bui, Bao Trong Dang, Van Tuan Doan, Joonhong Park, Wenshan Guo, Huu Hao Ngo
This study aimed to evaluate the performance of a high rate nitrogen removal lab-scale ANAMMOX reactor, namely Internal Circulation (IC) reactor, for old landfill leachate treatment. The reactor was operated with pre-treated leachate from a pilot Partial Nitritation Reactor (PNR) using a high nitrogen loading rate ranging from 2 to 10kgNm(-3)d(-1). High rate removal of nitrogen (9.52±1.11kgNm(-3)d(-1)) was observed at an influent nitrogen concentration of 1500mgNL(-1). The specific ANAMMOX activity was found to be 0...
February 28, 2017: Bioresource Technology
https://www.readbyqxmd.com/read/28326853/limonoid-from-the-rhizomes-of-luvunga-scandens-roxb-buch-ham
#15
Tan Phat Nguyen, Nhat Phan Minh, Trong Bui Dat, Tien Dung Le, Minh An Tran Nguyen, Thi Nhat Trinh Pham, Dinh Mai Tri
For first time, the chemical constituents of the rhizomes of Luvunga scandens (Roxb.) Buch. Ham. were investigated and led to the isolation of one new limonoid named Luvunga A (1), together with seven known compounds, including one limonoid (2) and six coumarins (3-8) were isolated for the first time from the species L. scandens by various chromatography methods. Their chemical structures were elucidated by IR, UV, HR-ESI-MS, NMR 1D and 2D experiments and compared with literatures.
March 22, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28286931/association-between-baseline-frailty-and-driving-status-over-time-a-secondary-analysis-of-the-national-health-and-aging-trends-study
#16
Elizabeth G Bond, Laura L Durbin, Jodi A Cisewski, Min Qian, Jack M Guralnik, Judith D Kasper, Thelma J Mielenz
BACKGROUND: Continued automobile driving is important for the wellbeing and independence of older adults. Frailty has been associated with a variety of negative health outcomes, but studies are lacking on the potential association between frailty and driving status. The present study uses data from The National Health and Aging Trends Study (NHATS) to assess if the presence of frailty is associated with being a current non-driver. METHODS: NHATS is a nationally representative cohort study of Medicare beneficiaries (aged ≥65) that have been followed since 2011...
December 2017: Injury Epidemiology
https://www.readbyqxmd.com/read/28278658/new-naphthalene-derivative-from-the-leaves-of-cassia-grandis-l
#17
Pham Thi Nhat Trinh, Ngoc Quoc Luan, Mai Dinh Tri, Vu Duy Khanh, Nguyen Huu An, Phan Nhat Minh, Pham Ngoc An, Nguyen Thi Le Thuy, Nguyen Kim Phi Phung, Le Tien Dung
Cassia grandis is used for the treatment of skin disorders, back pain, aches, etc. in Vietnamese traditional medicine. In this paper, phytochemicals of the leaves were investigated. A new naphthalene derivative (1, cassgranon D) and, seven known compounds rutin (2), afzelin (3), quercitrin (4), epicatechin (5), (-)-epiafzelechin (6), isoquercitrin (7) and aloe emodin (8) were isolated from the ethyl acetate and methanol extracts. Their structures were elucidated by spectral evidences (UV, IR, MS, (1)H, (13)C, DEPT, HSQC and HMBC NMR), as well as by comparing with published data...
February 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28269417/robot-assisted-retinal-vein-cannulation-with-force-based-puncture-detection-micron-vs-the-steady-hand-eye-robot
#18
Berk Gonenc, Nhat Tran, Peter Gehlbach, Russell H Taylor, Iulian Iordachita
Retinal vein cannulation is a demanding procedure where therapeutic agents are injected into occluded retina veins. The feasibility of this treatment is limited due to challenges in identifying the moment of venous puncture, achieving cannulation and maintaining it throughout the drug delivery period. In this study, we integrate a force-sensing microneedle with two distinct robotic systems: the handheld micromanipulator Micron, and the cooperatively controlled Steady-Hand Eye Robot (SHER). The sensed tool-to-tissue interaction forces are used to detect venous puncture and extend the robots' standard control schemes with a new position holding mode (PHM) that assists the operator hold the needle position fixed and maintain cannulation for a longer time with less trauma on the vasculature...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28252638/multifunctional-biocompatible-chitosan-polypyrrole-nanocomposites-as-novel-agents-for-photoacoustic-imaging-guided-photothermal-ablation-of-cancer
#19
Panchanathan Manivasagan, Nhat Quang Bui, Subramaniyan Bharathiraja, Madhappan Santha Moorthy, Yun-Ok Oh, Kyeongeun Song, Hansu Seo, Min Yoon, Junghwan Oh
Cancer nanotechnology is emerging as one of the promising strategies combining photothermal therapy (PTT) and photoacoustic imaging (PAI) for the treatment of breast cancer and it has received considerable attention in the recent years because it is minimally invasive, prevents damage to non-targeted regions, permits fast recovery, and involves breast cancer imaging. The present study demonstrates multifunctional biocompatible chitosan-polypyrrole nanocomposites (CS-PPy NCs) as novel agents for photoacoustic imaging-guided photothermal ablation of cancer because of their biocompatibility, conductivity, stability, and strong near-infrared (NIR) absorbance...
March 2, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28228451/african-american-stroke-survivors-more-caregiving-time-but-less-caregiving-burden
#20
Lesli E Skolarus, Vicki A Freedman, Chunyang Feng, James F Burke
BACKGROUND: Blacks have higher stroke incidence and experience greater poststroke disability than whites. To optimize care for stroke survivors, it is important to understand the amount of care that they receive and the implications for stroke caregivers. METHODS AND RESULTS: Data from 2 nationally representative, population-based studies, the NHATS (National Health and Aging Trends Study) linked to the NSOC (National Study of Caregiving), were used to identify elderly stroke survivors and their caregivers...
February 2017: Circulation. Cardiovascular Quality and Outcomes
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