keyword
MENU ▼
Read by QxMD icon Read
search

Media

keyword
https://www.readbyqxmd.com/read/29677682/potential-benefits-and-phytotoxicity-of-bulk-and-nano-chitosan-on-the-growth-morphogenesis-physiology-and-micropropagation-of-capsicum-annuum
#1
Ghasem Asgari-Targhi, Alireza Iranbakhsh, Zahra Oraghi Ardebili
Concerning environmental issues of metal based-nanomaterials and increasing demand for nano-based products; various strategies have been employed to find eco-friendly natural nano-compounds, among which nano-polymer chitosan is mostly considered. Herein, the various aspects of the way in which bulk or nano-chitosan may modify growth, morphogenesis, micropropagation, and physiology of Capsicum annuum L. were considered. Culture medium was manipulated with different concentrations of bulk chitosan or synthesized chitosan/tripolyphosphate (TPP) nano-particle...
April 12, 2018: Plant Physiology and Biochemistry: PPB
https://www.readbyqxmd.com/read/29677531/synthesis-of-nanowire-bundle-like-wo-3-w-18-o-49-heterostructures-for-highly-sensitive-nh-3-sensor-application
#2
Ya Xiong, Zongye Zhu, Tianchao Guo, Hui Li, Qingzhong Xue
Heterojunctions are very promising structures due to their hybrid properties, which are usually obtained via a multistep growth process. However, in this paper, WO3 -W18 O49 heterostructures are synthesized via a novel one-step approach by using isopropanol as reaction media and are applied in NH3 gas detection for the first time. The obtained WO3 -W18 O49 heterostructures with loose nanowire bundle-like morphology show a response value of 23.3 toward 500 ppm NH3 at 250 °C, which is 5.63 times higher than that of pristine W18 O49 ...
April 14, 2018: Journal of Hazardous Materials
https://www.readbyqxmd.com/read/29677448/self-assembled-ph-responsive-polymeric-micelles-for-highly-efficient-non-cytotoxic-delivery-of-doxorubicin-chemotherapy-to-inhibit-macrophage-activation-in-vitro-investigation
#3
Zhi-Sheng Liao, Shan-You Huang, Jyun-Jie Huang, Jem-Kun Chen, Ai-Wei Lee, Juin-Yih Lai, Duu-Jong Lee, Chih-Chia Cheng
Self-assembled pH-responsive polymeric micelles, a combination of hydrophilic poly(ethylene glycol) segments and hydrogen bonding interactions within a biocompatible polyurethane substrate, can spontaneously self-assemble into highly controlled, nanosized micelles in aqueous solution. These newly-developed micelles exhibit excellent pH-responsive behavior and biocompatibility, highly controlled drug (doxorubicin; DOX) release behavior and high drug encapsulation stability in different aqueous environments, making the micelles highly attractive potential candidates for safer, more effective drug delivery in applications such as cancer chemotherapy...
April 20, 2018: Biomacromolecules
https://www.readbyqxmd.com/read/29677363/the-effect-of-denatured-lysozyme-on-human-corneal-epithelial-cells
#4
David J McCanna, Sarah Oh, Junghee Seo, Chantal Coles-Brennan, Zohra Fadli, Lakshman N Subbaraman, Lyndon W Jones
Purpose: During contact lens wear, the amount of lysozyme deposited on contact lenses varies depending on the lens material. The binding of lysozyme to some contact lens materials may result in a conformational change that denatures the protein to an inactive form. This investigation evaluated the effect that denatured lysozyme has on human corneal epithelial cells (HCECs) by measuring cell viability and the release of inflammatory cytokines. Methods: HCECs were exposed to lysozyme that was denatured to various activity levels...
April 1, 2018: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/29677036/coupled-opg-fc-on-decellularized-aortic-valves-by-edc-nhs-attenuates-rat-mscs-calcification-in-vitro
#5
Qiao Zhang, Si Chen, Jiawei Shi, Fei Li, Xucong Shi, Xingjian Hu, Cheng Deng, Feng Shi, Guichun Han, Nianguo Dong
Valve calcification commonly damages natural human heart valves and tissue-engineered heart valves (TEHVs), and no ideal intervention is available in clinical practice. It is increasingly considered that osteoprotegerin (OPG) inhibits vascular calcification. We aimed to explore whether free OPG-Fc fusion protein or coupled OPG-Fc on decellularized aortic valves attenuates calcification. Calcification of rat bone marrow-derived mesenchymal stromal cells (MSCs) was induced by osteogenic differentiation media, and the effects of free OPG-Fc or OPG-Fc coupled on the decellularized porcine aortic heart valve leaflet scaffolds by coupling agents 1-ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC)/N-hydroxysuccinimide (NHS) on calcification were observed...
April 18, 2018: ASAIO Journal: a Peer-reviewed Journal of the American Society for Artificial Internal Organs
https://www.readbyqxmd.com/read/29676892/multiple-pathways-to-bacterial-load-reduction-by-stormwater-best-management-practices-tradeoffs-in-performance-volume-and-treated-area
#6
Jordyn Wolfand, Colin D Bell, Alexandria B Boehm, Terri Hogue, Richard G Luthy
Stormwater best management practices (BMPs) are implemented to reduce microbial pollution in runoff, but their removal efficiencies differ. Enhanced BMPs, such as those with media amendments, can increase removal of fecal indicator bacteria (FIB) in runoff from 0.25-log10 to above 3-log10 ; however, their implications for watershed-scale management are poorly understood. In this work, a computational model was developed to simulate watershed-scale bacteria loading and BMP performance, using the Ballona Creek Watershed (Los Angeles County, CA) as a case study...
April 20, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29676868/-how-i-treat-%C3%A2-an-acute-otitis-media-in-children
#7
V Heinrichs, J Frère
Acute otitis media (AOM) is very common in early childhood (inferior to 2 years). As a spontaneous recovery occurs in superior to 80 % of cases, antibiotics use should not be systematic. The aim of this review is to discuss AOM diagnostic criteria based on the latest recommendations, aiming a wiser use of antibiotics. Antibiotics use in a child with AOM should take into account the age, the severity of the disease, uni- or bilateral otitis, the presence or absence of otorrhea, and the presence of possible risk factors...
April 2018: Revue Médicale de Liège
https://www.readbyqxmd.com/read/29676850/an-integrated-multipath-lc-ms-system-for-the-simultaneous-preparation-separation-and-detection-of-proteins-and-small-molecules
#8
Dananjaya Kalu Appulage, Evelyn H Wang, Benjamin J Figard, Kevin A Schug
A multipath liquid chromatography with mass spectrometry instrument was constructed with the help of restricted access media to on-line segregate small and large molecules. This liquid chromatography system was custom built with five pumps and three two-position six-port valves to control the flow in a multipath system for the simultaneous analysis of small molecules and proteins. On separate chromatographic channels, small molecules trapped and proteins excluded from the on-line restricted access media were analyzed downstream using high efficiency columns and a triple quadrupole mass spectrometer...
April 20, 2018: Journal of Separation Science
https://www.readbyqxmd.com/read/29676820/oxygen-evolution-catalysis-with-m%C3%A3-ssbauerite-a-trivalent-iron-only-layered-double-hydroxide
#9
Michael Ertl, Corina Andronescu, Jonathon Moir, Mirijam Zobel, Friedrich E Wagner, Stefan Barwe, Geoffrey Ozin, Wolfgang Schuhmann, Josef Breu
Mössbauerite is investigated for the first time as an "iron only" mineral for the electrocatalytic oxygen evolution reaction in alkaline media. The synthesis proceeds via intermediate mixed-valence green rust that is rapidly oxidized in situ while conserving the layered double hydroxide structure. The material catalyzes the oxygen evolution reaction on a glassy carbon electrode with a current density of 10 mA cm-2 at 1.63 V versus the reversible hydrogen electrode. Stability measurements as well as post-electrolysis characterization are presented...
April 20, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29676810/recent-trends-in-sorption-based-sample-preparation-and-liquid-chromatography-techniques-for-food-analysis
#10
Edvaldo V Soares Maciel, Ana Lúcia de Toffoli, Fernando Mauro Lanças
The accelerated rising of the world's population increased the consumption of food, thus demanding more rigors in the control of residue and contaminants in food-based products marketed for human consumption. In view of the complexity of most food matrices, including fruits, vegetables, different types of meat, beverages, among others, a sample preparation step is important to provide more reliable results when combined with high performance liquid chromatography separations. An adequate sample preparation step before the chromatographic analysis is mandatory in obtaining higher precision and accuracy in order to improve the extraction of the target analytes, one of the priorities in analytical chemistry...
April 20, 2018: Electrophoresis
https://www.readbyqxmd.com/read/29676637/epigenomic-alterations-and-gene-expression-profiles-in-human-respiratory-epithelial-cells-mediated-by-hookah-and-cigarette-smoke
#11
Yin Xiong, Sichuan Xi, Jigui Shan, Elvin Hekimoglu, Shih-Hsin Hsiao, Mary Zhang, Julie A Hong, Chris Tao, Haobin Chen, R Taylor Ripley, Chuong D Hoang, David S Schrump
RATIONALE: The effects of hookah smoke on respiratory epithelia have not been well characterized. OBJECTIVES: To characterize and compare the effects of hookah tobacco smoke and conventional cigarette smoke on the epigenome and transcriptome of human respiratory epithelia. METHODS: Normal human small airway epithelial cells and cyclin-dependent kinase 4/human telomerase reverse transcriptase-immortalized human bronchial epithelial cells were cultured for 5 days in normal media in the presence or absence of water pipe condensates or cigarette smoke condensates under relevant exposure conditions...
April 2018: Annals of the American Thoracic Society
https://www.readbyqxmd.com/read/29676613/workshop-report-using-social-media-and-smartphone-applications-in-practical-lessons-to-enhance-student-learning-in-b%C3%A3%C2%BAzios-brazil-august-6-8-2017
#12
Camilo Lellis-Santos, Patricia A Halpin
Cost-effective student engagement poses a challenge for instructors, especially those who may not be familiar with new technologies and mobile devices. In this workshop, participants, experienced and discussed two ways of using smartphones in physiology classes: to engage in an online learning environment for discussions, and to make physiological measurements. Participants signed up for individual Twitter accounts and learned how to tweet, retweet, message, use a URL shortener, and use hashtags. They then went on to locate articles on an assigned topic from the Twitter accounts of credible science sources ( American Journal of Physiology, The Scientist, CDC...
June 1, 2018: Advances in Physiology Education
https://www.readbyqxmd.com/read/29676527/undergraduate-nursing-assistant-employment-in-aged-care-has-benefits-for-new-graduates
#13
Maricris Algoso, Lucie Ramjan, Leah East, Kath Peters
AIMS: To determine how undergraduate assistant in nursing employment in aged care helps to prepare new graduates for clinical work as a registered nurse. BACKGROUND: The amount and quality of clinical experience afforded by university programs has been the subject of constant debate in the nursing profession. New graduate nurses are often deemed inadequately prepared for clinical practice and so many nursing students seek employment as assistants in nursing whilst studying to increase their clinical experience...
April 20, 2018: Journal of Advanced Nursing
https://www.readbyqxmd.com/read/29676412/fabrication-of-hierarchical-cop-nanosheet-microwire-arrays-via-space-confined-phosphidation-toward-high-efficiency-water-oxidation-electrocatalysis-under-alkaline-conditions
#14
Xuqiang Ji, Rong Zhang, Xifeng Shi, Abdullah M Asiri, Baozhan Zheng, Xuping Sun
In spite of recent advances in the synthesis of transition metal phosphide nanostructures, the simple fabrication of hierarchical arrays with more accessible active sites still remains a great challenge. In this Communication, we report a space-confined phosphidation strategy toward developing hierarchical CoP nanosheet@microwire arrays on nickel foam (CoP NS@MW/NF) using a Co(H2PO4)2·2H3PO4 microwire array as the precursor. The thermally stable nature of the anion in the precursor is key to hierarchical nanostructure formation...
April 20, 2018: Nanoscale
https://www.readbyqxmd.com/read/29676218/vaunting-the-independent-amateur-scientific-american-and-the-representation-of-lay-scientists
#15
Sean F Johnston
This paper traces how media representations encouraged enthusiasts, youth and skilled volunteers to participate actively in science and technology during the twentieth century. It assesses how distinctive discourses about scientific amateurs positioned them with respect to professionals in shifting political and cultural environments. In particular, the account assesses the seminal role of a periodical, Scientific American magazine, in shaping and championing an enduring vision of autonomous scientific enthusiasms...
April 20, 2018: Annals of Science
https://www.readbyqxmd.com/read/29675942/occurrence-of-plasmid-mediated-quinolone-resistance-genes-in-escherichia-coli-and-klebsiella-spp-recovered-from-corvus-brachyrhynchos-and-corvus-corax-roosting-in-canada
#16
Nicol Janecko, Dana Halova, Ivana Jamborova, Ivo Papousek, Martina Masarikova, Monika Dolejska, Ivan Literak
The spread of antimicrobial resistance from human activity derived sources to natural habitats implicates wildlife as potential vectors of antimicrobial resistance transfer. Wild birds, including corvid species can disseminate mobile genetic resistance determinants through feces. This study aimed to determine the occurrence of plasmid-mediated quinolone resistance (PMQR) genes in Escherichia coli and Klebsiella spp. isolates obtained from winter roosting sites of American crows (Corvus brachyrhynchos) and common ravens (Corvus corax) in Canada...
April 19, 2018: Letters in Applied Microbiology
https://www.readbyqxmd.com/read/29675845/genome-sequence-and-description-of-gracilibacillus-timonensis-sp-nov-strain-marseille-p2481-t-a-moderate-halophilic-bacterium-isolated-from-the-human-gut-microflora
#17
Awa Diop, El Hadji Seck, Gregory Dubourg, Nicholas Armstrong, Caroline Blanc-Tailleur, Didier Raoult, Pierre-Edouard Fournier
Microbial culturomics represents an ongoing revolution in the characterization of the human gut microbiota. By using three culture media containing high salt concentrations (10, 15, and 20% [w/v] NaCl), we attempted an exhaustive exploration of the halophilic microbial diversity of the human gut and isolated strain Marseille-P2481 (= CSUR P2481 =  DSM 103076), a new moderately halophilic bacterium. This bacterium is a Gram-positive, strictly aerobic, spore-forming rod that is motile by use of a flagellum and exhibits catalase, but not oxidase activity...
April 19, 2018: MicrobiologyOpen
https://www.readbyqxmd.com/read/29675705/marked-increase-in-measles-vaccination-coverage-among-young-adults-in-switzerland-a-campaign-or-cohort-effect
#18
Ekkehardt Altpeter, Monica N Wymann, Jean-Luc Richard, Mirjam Mäusezahl-Feuz
OBJECTIVES: To evaluate the impact of the Swiss measles elimination strategy-including a mass media campaign-on vaccination coverage and awareness among young adults aged 20-29 years. METHODS: Comparison of the results of two cross-sectional population surveys in 2012 and 2015. RESULTS: Documented vaccination coverage increased from 77 to 88% for two doses of measles vaccine. Major determinants of complete vaccination were survey year, birth cohort, sex and the absence of prior measles disease...
April 19, 2018: International Journal of Public Health
https://www.readbyqxmd.com/read/29675574/amyloid-precursor-protein-dimerisation-reduces-neurite-outgrowth
#19
Luan Luu, Giuseppe D Ciccotosto, Laura J Vella, Lesley Cheng, Laila C Roisman, Gerhard Multhaup, Andrew F Hill, Lisa-Marie Munter, Roberto Cappai
The amyloid precursor protein (APP) undergoes extensive metabolism, and its transport and proteolytic processing can be modulated by its ability to form a homodimer. We have investigated the functional consequences of stabilised APP dimer expression in cells by studying the engineered dimerisation of the APPL17C (residue 17 in Aβ sequence) construct, which is associated with a 30% increase in APP dimer expression, on APP's neurite outgrowth promoting activity. Overexpression of APPL17C in SH-SY5Y cells decreased neurite outgrowth upon retinoic acid differentiation as compared to overexpressing APPWT cells...
April 19, 2018: Molecular Neurobiology
https://www.readbyqxmd.com/read/29675309/ultrasound-mediation-of-self-illuminating-reporters-improves-imaging-resolution-in-optically-scattering-media
#20
Junaid Ahmad, Baptiste Jayet, Philip J Hill, Melissa L Mather, Hamid Dehghani, Stephen P Morgan
In vivo imaging of self-illuminating bio-and chemiluminescent reporters is used to observe the physiology of small animals. However, strong light scattering by biological tissues results in poor spatial resolution of the optical imaging, which also degrades the quantitative accuracy. To overcome this challenging problem, focused ultrasound is used to modulate the light from the reporter at the ultrasound frequency. This produces an ultrasound switchable light 'beacon' that reduces the influence of light scattering in order to improve spatial resolution...
April 1, 2018: Biomedical Optics Express
keyword
keyword
20169
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"