keyword
MENU ▼
Read by QxMD icon Read
search

Micronic

keyword
https://www.readbyqxmd.com/read/28340080/measuring-pm2-5-ultrafine-particles-air-nicotine-and-wipe-samples-following-the-use-of-electronic-cigarettes
#1
Paul Melstrom, Bartosz Koszowski, Meridith Hill Thanner, Eunha Hoh, Brian King, Rebecca Bunnell, Tim McAfee
Background: Few studies have examined the extent of inhalation or dermal contact among bystanders following short-term, secondhand e-cigarette exposure. Objective: Measure PM2.5 (particles <2.5 microns), UF (ultrafine particles <100nm), and nicotine in air and deposited on surfaces and clothing pre-/during/post- a short-term (two-hour) e-cigarette exposure. Methods: E-cigarettes were used ad libitum by three experienced users for two hours during two separate sessions (disposable e-cigarettes, then tank-style e-cigarettes, or "tanks") in a 1858ft3 room...
March 9, 2017: Nicotine & Tobacco Research: Official Journal of the Society for Research on Nicotine and Tobacco
https://www.readbyqxmd.com/read/28338586/towards-microsurgical-correction-of-cleft-lip-ex-utero-via-restoration-of-craniofacial-developmental-programs
#2
Xue Dong, Wilmina N Landford, James Hart, Maurizio Risolino, Omer Kaymakcalan, Julia Jin, Yoshiko Toyoda, Elisabetta Ferretti, Licia Selleri, Jason A Spector
BACKGROUND: Cleft Lip with or without Palate (CL/P) is present in approximately 1 in 500-700 live births, representing the most common congenital craniofacial anomaly. Previously, we developed a unique murine model with compound Pbx deficiency that exhibits fully penetrant CL/P. To investigate the possibility of tissue repair at an early gestational stage, we designed a minimally invasive surgical approach suitable for intrauterine repair using Wnt9b-soaked collagen microspheres to restore craniofacial developmental programs for cleft correction...
March 3, 2017: Plastic and Reconstructive Surgery
https://www.readbyqxmd.com/read/28337767/impact-of-drying-and-micronization-on-the-physico-chemical-properties-and-antioxidant-activities-of-celery-stalk
#3
Karna Ramachandraiah, Koo Bok Chin
BACKGROUND: The influence of convective drying and ball-mill treatment of celery stalk on particle size distribution, physicochemical properties, bioactive compounds and antioxidant activities were analyzed in this study. RESULTS: Ball-milling of celery stalk dried at the temperatures of 50, 75 and 100 °C resulted in decreasing average particle sizes of 48.8, 10.5 and 7.2 µm, respectively. Bulk density was increased with reduced particle size. Darker (L*) and reddish (a*) powders were formed at higher temperatures while ball-milling increased greenness (-a*) of powders dried at 50 and 75 °C...
March 23, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28336887/sio2-zno-composite-hollow-sub-micron-fibers-fabrication-from-facile-single-capillary-electrospinning-and-their-photoluminescence-properties
#4
Guanying Song, Zhenjiang Li, Kaihua Li, Lina Zhang, Alan Meng
In this work, SiO2/ZnO composite hollow sub-micron fibers were fabricated by a facile single capillary electrospinning technique followed by calcination, using tetraethyl orthosilicate (TEOS), polyvinylpyrrolidone (PVP) and ZnO nanoparticles as raw materials. The characterization results of the scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR) spectra indicated that the asprepared composite hollow fibers consisted of amorphous SiO2 and hexagonal wurtzite ZnO...
February 24, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28336283/-early-efficacy-of-dexamethasone-implant-ozurdex-%C3%A2-in-diabetic-macular-edema-real-life-study
#5
V Sarda, F Fajnkuchen, S Nghiem-Buffet, T Grenet, G Chaine, A Giocanti-Auregan
PURPOSE: To assess early efficacy of dexamethasone intravitreal implant 0.7mg (OZURDEX(®)) at the time of peak efficacy (2 months after injection) in patients with decreased visual acuity secondary to diabetic macular edema (DME). MATERIALS AND METHODS: Retrospective monocentric study. Inclusion criteria were best-corrected visual acuity (BCVA)≤70 letters (20/40) due to DME and central retinal thickness (CRT)≥300 microns (Cirrus 2, Carl Zeiss Meditec, Inc, Dublin)...
March 20, 2017: Journal Français D'ophtalmologie
https://www.readbyqxmd.com/read/28335357/the-assembly-of-dna-amphiphiles-at-liquid-crystal-aqueous-interface
#6
Jingsheng Zhou, Yuanchen Dong, Yiyang Zhang, Dongsheng Liu, Zhongqiang Yang
In this article, we synthesized a type of DNA amphiphiles (called DNA-lipids) and systematically studied its assembly behavior at the liquid crystal (LC)-aqueous interface. It turned out that the pure DNA-lipids at various concentrations cannot trigger the optical transition of liquid crystals from planar anchoring to homeotropic anchoring at the liquid crystal-aqueous interface. The co-assembly of DNA-lipid and l-dilauroyl phosphatidylcholine (l-DLPC) indicated that the DLPC assembled all over the LC-aqueous interface, and DNA-lipids prefer to couple with LC in certain areas, particularly in polarized and fluorescent image, forming micron sized net-like structures...
December 1, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28333856/extreme-diurnal-variation-of-central-macular-thickness-in-diabetic-macular-edema
#7
Kumar Sambhav, Sandeep Grover, Kakarla V Chalam
PURPOSE: Spectral domain optical coherence tomography is an established modality to quantify diabetic macular edema (DME). Change in central subfield thickness exceeding 3% to 6% in DME is likely to be significant. In this case of DME, we describe an extreme bilateral variation in central macular thickness on spectral domain optical coherence tomography over two consecutive days without any treatment. METHODS: The patient with DME and nonproliferative diabetic retinopathy underwent visual acuity testing, slit-lamp biomicroscopy, and dilated fundus examination...
March 22, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28333318/a-phase-iii-randomized-controlled-trial-comparing-the-efficacy-safety-and-tolerability-of-oral-dydrogesterone-versus-micronized-vaginal-progesterone-for-luteal-support-in-in-vitro-fertilization
#8
Herman Tournaye, Gennady T Sukhikh, Elke Kahler, Georg Griesinger
STUDY QUESTION: Is oral dydrogesterone 30 mg daily (10 mg three times daily [TID]) non-inferior to micronized vaginal progesterone (MVP) 600 mg daily (200 mg TID) for luteal support in in vitro fertilization (IVF), assessed by the presence of fetal heartbeats determined by transvaginal ultrasound at 12 weeks of gestation? SUMMARY ANSWER: Non-inferiority of oral dydrogesterone versus MVP was demonstrated at 12 weeks of gestation, with a difference in pregnancy rate and an associated confidence interval (CI) that were both within the non-inferiority margin...
March 1, 2017: Human Reproduction
https://www.readbyqxmd.com/read/28332484/multivariate-regression-methods-for-estimating-velocity-of-ictal-discharges-from-human-microelectrode-recordings
#9
Jyun-You Liou, Elliot Smith, Lisa Bateman, Guy McKhann, Robert Goodman, Bradley Greger, Tyler Davis, Spencer Kellis, Paul House, Catherine Schevon
OBJECTIVE: Epileptiform discharges, an electrophysiological hallmark of seizures, can propagate across cortical tissue in a manner similar to traveling waves. Recent work has focused attention on the origination and propagation patterns of these discharges, yielding important clues to their source location and mechanism of travel. However, systematic studies of methods for measuring propagation are lacking. APPROACH: We analyzed epileptiform discharges in microelectrode array recordings of human seizures...
March 23, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28328202/synthesis-and-fabrication-of-nanocomposite-fibers-of-collagen-cellulose-nanocrystals-by-coelectrocompaction
#10
Elvis Cudjoe, Mousa Younesi, Edward Cudjoe, Ozan Akkus, Stuart J Rowan
An electrochemical process has been used to compact cellulose nanocrystals (CNC) and access aligned micron-sized CNC fibers. Placing a current across aqueous solutions of carboxylic acid functionalized CNCs (t-CNC-COOH) or carboxylic acid/primary amine functionalized CNCs (t-CNC-COOH-NH2) creates a pH gradient between the electrodes, which results in the migration and concentration of the CNC fibers at their isoelectric point. By matching the carboxylic acid/amine ratio of CNCs and collagen (ca. 30:70 carboxylic acid:amine ratio), it is possible to coelectrocompact both nanofibers and access aligned nanocomposite fibers...
March 22, 2017: Biomacromolecules
https://www.readbyqxmd.com/read/28328041/sem-microphotogrammetry-a-new-take-on-an-old-method-for-generating-high-resolution-3d-models-from-sem-images
#11
A D Ball, P A Job, A E L Walker
The method we present here uses a scanning electron microscope programmed via macros to automatically capture dozens of images at suitable angles to generate accurate, detailed three-dimensional (3D) surface models with micron-scale resolution. We demonstrate that it is possible to use these Scanning Electron Microscope (SEM) images in conjunction with commercially available software originally developed for photogrammetry reconstructions from Digital Single Lens Reflex (DSLR) cameras and to reconstruct 3D models of the specimen...
March 22, 2017: Journal of Microscopy
https://www.readbyqxmd.com/read/28325153/ultra-micronized-palmitoylethanolamide-an-efficacious-adjuvant-therapy-for-parkinson-s-disease
#12
Stefania Brotini, Carlo Schievano, Leonello Guidi
BACKGROUND: Parkinson's disease (PD) is the subject of intense efforts to develop strategies that slow down or stop disease progression and disability. Substantial evidence points to a prominent role for neuroinflammation in the underlying dopaminergic cell death. Ultramicronized palmitoylethanolamide (um-PEA) is well-known for its ability to promote the resolution of neuroinflammation and exert neuroprotection. This study was designed to assess the efficacy of um-PEA as adjuvant therapy in patients with advanced PD...
March 21, 2017: CNS & Neurological Disorders Drug Targets
https://www.readbyqxmd.com/read/28323981/ovarian-lipid-metabolism-modulates-circulating-lipids-in-premenopausal-women
#13
Jeffrey T Jensen, Ilana B Addis, Jon D Hennebold, Randy L Bogan
Context: The premenopausal circulating lipid profile may be linked to the hormonal profile and ovarian lipid metabolism. Objective: Assess how estradiol, progesterone, and ovarian lipid metabolism contribute to the premenopausal lipid profile. Also, evaluate the acute effects of a common hormonal oral contraceptive (OC) on circulating lipids. Design: Experimental crossover with repeated measures. Setting: Academic hospitals...
January 6, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28323291/vaginal-use-of-micronized-progesterone-for-luteal-support-a-randomized-study-comparing-utrogestan%C3%A2-and-crinone%C3%A2-8
#14
Lucie Michnova, Jiri Dostal, Milan Kudela, Petr Hamal, Katerina Langova
BACKGROUND AND OBJECTIVE: Luteal phase physiology is distorted by in vitro fertilization (IVF) cycles using gonadotropin-releasing hormone (GnRH) agonists and antagonists, Controlled ovarian hyperstimulation leads to luteal phase defect and for this reason, luteal phase support is now an integral part of IVF/ICSI-ET programs. The support is provided by hCG, progesterone or GnRH-a. This study compared the efficiency, safety and tolerance of two vaginal micronized progesterones, Utrogestan and Crinone 8%...
March 14, 2017: Biomedical Papers of the Medical Faculty of the University Palacký, Olomouc, Czechoslovakia
https://www.readbyqxmd.com/read/28322312/imaging-tissue-mimic-with-light-sheet-microscopy-a-comparative-guideline
#15
Jordi Andilla, Raphael Jorand, Omar E Olarte, Alexandre C Dufour, Martine Cazales, Yoann L E Montagner, Romain Ceolato, Nicolas Riviere, Jean-Christophe Olivo-Marin, Pablo Loza-Alvarez, Corinne Lorenzo
Tissue mimics (TMs) on the scale of several hundred microns provide a beneficial cell culture configuration for in vitro engineered tissue and are currently under the spotlight in tissue engineering and regenerative medicine. Due to the cell density and size, TMs are fairly inaccessible to optical observation and imaging within these samples remains challenging. Light Sheet Fluorescence Microscopy (LSFM)- an emerging and attractive technique for 3D optical sectioning of large samples- appears to be a particularly well-suited approach to deal with them...
March 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28318265/cytoskeletal-like-filaments-of-ca-2-calmodulin-dependent-protein-kinase-ii-are-formed-in-a-regulated-and-zn-2-dependent-manner
#16
Laurel Hoffman, Lin Li, Emil Alexov, Hugo Sanabria, M Neal Waxham
Ca(2+)-calmodulin-dependent protein kinase II (CaMKII) is highly abundant in neurons, where its concentration reaches that typically found for cytoskeletal proteins. Functional reasons for such a high concentration are not known, but given the multitude of known binding partners for CaMKII, a role as a scaffolding molecule has been proposed. In this report, we provide experimental evidence that demonstrates a novel structural role for CaMKII. We discovered that CaMKII forms filaments that can extend for several micrometers in the presence of certain divalent cations (Zn(2+), Cd(2+), and Cu(2+)) but not with others (Ca(2+), Mg(2+), Co(2+), and Ni(2+))...
March 24, 2017: Biochemistry
https://www.readbyqxmd.com/read/28318000/in-situ-observation-of-self-assembly-of-sugars-and-surfactants-from-nanometres-to-microns
#17
Samia Ouhajji, Jasper Landman, Sylvain Prévost, Lingxiang Jiang, Albert P Philipse, Andrei V Petukhov
The hierarchical self-assembly of sugar and surfactant molecules into hollow tubular microstructures was characterized in situ with high resolution small-angle X-ray scattering spanning more than three orders of magnitude of spatial scales. Scattering profiles reveal that aqueous host-guest inclusion complexes self-assemble into multiple equally spaced curved bilayers forming a collection of concentric hollow cylinders. Scattering data can be described by a simple theoretical model of the microtubes. The interlamellar distance was found to be surprisingly large...
March 20, 2017: Soft Matter
https://www.readbyqxmd.com/read/28317938/on-the-determination-of-%C3%AF-2-in-thin-films-a-comparison-of-one-beam-second-harmonic-generation-measurement-methodologies
#18
Artur Hermans, Clemens Kieninger, Kalle Koskinen, Andreas Wickberg, Eduardo Solano, Jolien Dendooven, Martti Kauranen, Stéphane Clemmen, Martin Wegener, Christian Koos, Roel Baets
The determination of the second-order susceptibility (χ((2))) of thin film samples can be a delicate matter since well-established χ((2)) measurement methodologies such as the Maker fringe technique are best suited for nonlinear materials with large thicknesses typically ranging from tens of microns to several millimeters. Here we compare two different second-harmonic generation setups and the corresponding measurement methodologies that are especially advantageous for thin film χ((2)) characterization. This exercise allows for cross-checking the χ((2)) obtained for identical samples and identifying the main sources of error for the respective techniques...
March 20, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28316952/interface-between-mta-and-dental-bonding-agents-scanning-electron-microscope-evaluation
#19
Gabriele Cervino, Luca Fiorillo, Gianrico Spagnuolo, Ennio Bramanti, Luigi Laino, Floriana Lauritano, Marco Cicciù
AIMS AND OBJECTIVES: Nowadays, the material that offers the best sealing characteristic in the field of endodontic treatment is the mineral trioxide aggregate (MTA), nevertheless, this material necessities an adhesive bonding agent to perfectly join to the dental surface. The aim of this study was to analyze using a scanning electron microscope (SEM) the possible microgap between the adhesive, MTA, and the dental surface. MATERIAL AND METHODS: Fourteen extracted molars were divided into two groups - group A was prepared with MTA-component adhesive and group B was prepared with MTA and composite dual etching...
January 2017: Journal of International Society of Preventive & Community Dentistry
https://www.readbyqxmd.com/read/28315813/the-case-for-applying-tissue-engineering-methodologies-to-instruct-human-organoid-morphogenesis
#20
REVIEW
Carlos R Marti-Figueroa, Randolph S Ashton
Three-dimensional organoids derived from human pluripotent stem cell (hPSC) derivatives have become widely used in vitro models for studying development and disease. Their ability to recapitulate facets of normal human development during in vitro morphogenesis produces tissue structures with unprecedented biomimicry. Current organoid derivation protocols primarily rely on spontaneous morphogenesis processes to occur within 3-D spherical cell aggregates with minimal to no exogenous control. This yields organoids containing microscale regions of biomimetic tissues, but at the macroscale (i...
March 15, 2017: Acta Biomaterialia
keyword
keyword
68034
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"