keyword
MENU ▼
Read by QxMD icon Read
search

Oxygenation

keyword
https://www.readbyqxmd.com/read/28335557/ros-production-and-erk-activity-are-involved-in-the-effects-of-d-%C3%AE-hydroxybutyrate-and-metformin-in-a-glucose-deficient-condition
#1
Santosh Lamichhane, Tonking Bastola, Ramesh Pariyar, Eun-Sol Lee, Ho-Sub Lee, Dae Ho Lee, Jungwon Seo
Hypoglycemia, a complication of insulin or sulfonylurea therapy in diabetic patients, leads to brain damage. Furthermore, glucose replenishment following hypoglycemic coma induces neuronal cell death. In this study, we investigated the molecular mechanism underlying glucose deficiency-induced cytotoxicity and the protective effect of d-β-hydroxybutyrate (D-BHB) using SH-SY5Y cells. The cytotoxic mechanism of metformin under glucose deficiency was also examined. Cell viability under 1 mM glucose (glucose deficiency) was significantly decreased which was accompanied by increased production of reactive oxygen species (ROS) and decreased phosphorylation of extracellular signal-regulated kinase (ERK) and glycogen synthase 3 (GSK3β)...
March 21, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335500/comparison-of-two-types-of-overoxidized-pedot-films-and-their-application-in-sensor-fabrication
#2
Yun Hui, Chao Bian, Jinfen Wang, Jianhua Tong, Shanhong Xia
Poly(3,4-ethylenedioxythiophene) (PEDOT) films were prepared by electro-oxidation on Au microelectrodes in an aqueous solution. Electrolyte solutions and polymerization parameters were optimized prior to overoxidation. The effect of overoxidation time has been optimized by cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS), which results in the film overoxidized for 45 s at 1.35 V presenting a strong adsorption. The other one-step overoxidation film prepared by direct CV ranging from -0...
March 19, 2017: Sensors
https://www.readbyqxmd.com/read/28335469/comparison-of-the-pharmacokinetic-properties-of-hemoglobin-based-oxygen-carriers
#3
REVIEW
Kazuaki Taguchi, Keishi Yamasaki, Toru Maruyama, Masaki Otagiri
Hemoglobin (Hb) is an ideal material for use in the development of an oxygen carrier in view of its innate biological properties. However, the vascular retention of free Hb is too short to permit a full therapeutic effect because Hb is rapidly cleared from the kidney via glomerular filtration or from the liver via the haptogloblin-CD 163 pathway when free Hb is administered in the blood circulation. Attempts have been made to develop alternate acellular and cellular types of Hb based oxygen carriers (HBOCs), in which Hb is processed via various routes in order to regulate its pharmacokinetic properties...
March 18, 2017: Journal of Functional Biomaterials
https://www.readbyqxmd.com/read/28335426/elevated-serum-hepcidin-levels-during-an-intensified-training-period-in-well-trained-female-long-distance-runners
#4
Aya Ishibashi, Naho Maeda, Daichi Sumi, Kazushige Goto
Iron is essential for providing oxygen to working muscles during exercise, and iron deficiency leads to decreased exercise capacity during endurance events. However, the mechanism of iron deficiency among endurance athletes remains unclear. In this study, we compared iron status between two periods involving different training regimens. Sixteen female long-distance runners participated. Over a seven-month period, fasting blood samples were collected during their regular training period (LOW; middle of February) and during an intensified training period (INT; late of August) to determine blood hematological, iron, and inflammatory parameters...
March 14, 2017: Nutrients
https://www.readbyqxmd.com/read/28335406/factors-that-negatively-affect-the-prognosis-of-pediatric-community-acquired-pneumonia-in-district-hospital-in-tanzania
#5
Serena Caggiano, Nicola Ullmann, Elisa De Vitis, Marzia Trivelli, Chiara Mariani, Maria Podagrosi, Fabiana Ursitti, Chiara Bertolaso, Carolina Putotto, Marta Unolt, Andrea Pietravalle, Paola Pansa, Kajoro Mphayokulela, Maria Incoronata Lemmo, Michael Mkwambe, Joseph Kazaura, Marzia Duse, Francesco Nieddu, Chiara Azzari, Renato Cutrera
Community-acquired pneumonia (CAP) is still the most important cause of death in countries with scarce resources. All children (33 months ± 35 DS) discharged from the Pediatric Unit of Itigi Hospital, Tanzania, with a diagnosis of CAP from August 2014 to April 2015 were enrolled. Clinical data were gathered. Dried blood spot (DBS) samples for quantitative real-time polymerase chain reaction (PCR) for bacterial detection were collected in all 100 children included. Twenty-four percent of patients were identified with severe CAP and 11% died...
March 13, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28335372/graphene-oxide-bionanocomposite-coatings-with-high-oxygen-barrier-properties
#6
Ilke Uysal Unalan, Derya Boyacı, Masoud Ghaani, Silvia Trabattoni, Stefano Farris
In this work, we present the development of bionanocomposite coatings on poly(ethylene terephthalate) (PET) with outstanding oxygen barrier properties. Pullulan and graphene oxide (GO) were used as main polymer phase and nanobuilding block (NBB), respectively. The oxygen barrier performance was investigated at different filler volume fractions (ϕ) and as a function of different relative humidity (RH) values. Noticeably, the impermeable nature of GO was reflected under dry conditions, in which an oxygen transmission rate (OTR, mL·m(-2)·24 h(-1)) value below the detection limit of the instrument (0...
December 21, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335371/synthesis-of-antifungal-agents-from-xanthene-and-thiazine-dyes-and-analysis-of-their-effects
#7
Joo Ran Kim, Stephen Michielsen
Indoor fungi growth is an increasing home health problem as our homes are more tightly sealed. One thing that limits durability of the antifungal agents is the scarcity of reactive sites on many surfaces to attach these agents. In order to increase graft yield of photosensitizers to the fabrics, poly(acrylic acid-co-styrene sulfonic acid-co-vinyl benzyl rose bengal or phloxine B) were polymerized and then grafted to electrospun fabrics. In an alternative process, azure A or toluidine blue O were grafted to poly(acrylic acid), which was subsequently grafted to nanofiber-based and microfiber-based fabrics...
December 20, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335350/shape-and-charge-of-gold-nanomaterials-influence-survivorship-oxidative-stress-and-moulting-of-daphnia-magna
#8
Fatima Nasser, Adam Davis, Eugenia Valsami-Jones, Iseult Lynch
Engineered nanomaterials (ENMs) are materials with at least one dimension between 1-100 nm. The small size of ENMs results in a large surface area to volume ratio, giving ENMs novel characteristics that are not traditionally exhibited by larger bulk materials. Coupled with large surface area is an enormous capacity for surface functionalization of ENMs, e.g., with different ligands or surface changes, leading to an almost infinite array of variability of ENMs. Here we explore the effects of various shaped (spheres, rods) and charged (negative, positive) gold ENMs on Daphnia magna (D...
November 25, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335333/plant-mediated-green-synthesis-of-cuo-nanoparticles-comparison-of-toxicity-of-engineered-and-plant-mediated-cuo-nanoparticles-towards-daphnia-magna
#9
Sadia Saif, Arifa Tahir, Tayyaba Asim, Yongsheng Chen
Research on green production methods for metal oxide nanoparticles (NPs) is growing, with the objective to overcome the potential hazards of these chemicals for a safer environment. In this study, facile, ecofriendly synthesis of copper oxide (CuO) nanoparticles was successfully achieved using aqueous extract of Pterospermum acerifolium leaves. P. acerifolium-fabricated CuO nanoparticles were further characterized by UV-Visible spectroscopy, field emission scanning electron microscopy (FE-SEM), energy dispersive X-ray (EDX), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS) and dynamic light scattering (DLS)...
November 9, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335331/the-use-of-spray-dried-mn%C3%A2-o%C3%A2-c-composites-as-electrocatalysts-for-li-o%C3%A2-batteries
#10
Hong-Kai Yang, Chih-Chun Chin, Jenn-Shing Chen
The electrocatalytic activities of Mn₃O₄/C composites are studied in lithium-oxygen (Li-O₂) batteries as cathode catalysts. The Mn₃O₄/C composites are fabricated using ultrasonic spray pyrolysis (USP) with organic surfactants as the carbon sources. The physical and electrochemical performance of the composites is characterized by X-ray diffraction, scanning electron microscopy, particle size analysis, Brunauer-Emmett-Teller (BET) measurements, elemental analysis, galvanostatic charge-discharge methods and rotating ring-disk electrode (RRDE) measurements...
November 7, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335326/tuning-the-emission-energy-of-chemically-doped-graphene-quantum-dots
#11
Noor-Ul-Ain, Martin O Eriksson, Susann Schmidt, M Asghar, Pin-Cheng Lin, Per Olof Holtz, Mikael Syväjärvi, G Reza Yazdi
Tuning the emission energy of graphene quantum dots (GQDs) and understanding the reason of tunability is essential for the GOD function in optoelectronic devices. Besides material-based challenges, the way to realize chemical doping and band gap tuning also pose a serious challenge. In this study, we tuned the emission energy of GQDs by substitutional doping using chlorine, nitrogen, boron, sodium, and potassium dopants in solution form. Photoluminescence data obtained from (Cl- and N-doped) GQDs and (B-, Na-, and K-doped) GQDs, respectively exhibited red- and blue-shift with respect to the photoluminescence of the undoped GQDs...
November 3, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335316/polymer-nanocomposite-film-with-metal-rich-surface-prepared-by-in-situ-single-step-formation-of-palladium-nanoparticles-an-interesting-way-to-combine-specific-functional-properties
#12
David Thompson, David Kranbuehl, Eliane Espuche
This paper presents a continuous single-step route that permits preparation of a thermostable polymer/metal nanocomposite film and to combine different functional properties in a unique material. More precisely, palladium nanoparticles are in situ generated in a polyimide matrix thanks to a designed curing cycle which is applied to a polyamic acid/metal precursor solution cast on a glass plate. A metal-rich surface layer which is strongly bonded to the bulk film is formed in addition to homogeneously dispersed metal nanoparticles...
October 18, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335315/oxidation-of-co-and-methanol-on-pd-ni-catalysts-supported-on-different-chemically-treated-carbon-nanofibers
#13
Juan Carlos Calderón, Miguel Rios Ráfales, María Jesús Nieto-Monge, Juan Ignacio Pardo, Rafael Moliner, María Jesús Lázaro
In this work, palladium-nickel nanoparticles supported on carbon nanofibers were synthesized, with metal contents close to 25 wt % and Pd:Ni atomic ratios near to 1:2. These catalysts were previously studied in order to determine their activity toward the oxygen reduction reaction. Before the deposition of metals, the carbon nanofibers were chemically treated in order to generate oxygen and nitrogen groups on their surface. Transmission electron microscopy analysis (TEM) images revealed particle diameters between 3 and 4 nm, overcoming the sizes observed for the nanoparticles supported on carbon black (catalyst Pd-Ni CB 1:2)...
October 18, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335307/zinc-oxide-nanorods-decorated-graphene-nanoplatelets-a-promising-antimicrobial-agent-against-the-cariogenic-bacterium-streptococcus-mutans
#14
Elena Zanni, Chandrakanth Reddy Chandraiahgari, Giovanni De Bellis, Maria Rita Montereali, Giovanna Armiento, Paolo Ballirano, Antonella Polimeni, Maria Sabrina Sarto, Daniela Uccelletti
Nanomaterials are revolutionizing the field of medicine to improve the quality of life due to the myriad of applications stemming from their unique properties, including the antimicrobial activity against pathogens. In this study, the antimicrobial and antibiofilm properties of a novel nanomaterial composed by zinc oxide nanorods-decorated graphene nanoplatelets (ZNGs) are investigated. ZNGs were produced by hydrothermal method and characterized through field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) techniques...
September 29, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335299/synthesis-of-sic-ag-cellulose-nanocomposite-and-its-antibacterial-activity-by-reactive-oxygen-species-generation
#15
Andrzej Borkowski, Tomasz Cłapa, Mateusz Szala, Arkadiusz Gąsiński, Marek Selwet
We describe the synthesis of nanocomposites, based on nanofibers of silicon carbide, silver nanoparticles, and cellulose. Silver nanoparticle synthesis was achieved with chemical reduction using hydrazine by adding two different surfactants to obtain a nanocomposite with silver nanoparticles of different diameters. Determination of antibacterial activity was based on respiration tests. Enzymatic analysis indicates oxidative stress, and viability testing was conducted using an epifluorescence microscope. Strong bactericidal activity of nanocomposites was found against bacteria Escherichia coli and Bacillus cereus, which were used in the study as typical Gram-negative and Gram-positive bacteria, respectively...
September 13, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335275/methanol-tolerant-platinum-palladium-catalyst-supported-on-nitrogen-doped-carbon-nanofiber-for-high-concentration-direct-methanol-fuel-cells
#16
Jiyoung Kim, Jin-Sung Jang, Dong-Hyun Peck, Byungrok Lee, Seong-Ho Yoon, Doo-Hwan Jung
Pt-Pd catalyst supported on nitrogen-doped carbon nanofiber (N-CNF) was prepared and evaluated as a cathode electrode of the direct methanol fuel cell (DMFC). The N-CNF, which was directly synthesized by the catalytic chemical vapor deposition from acetonitrile at 640 °C, was verified as having a change of electrochemical surface properties such as oxygen reduction reaction (ORR) activities and the electrochemical double layer compared with common carbon black (CB). To attain the competitive oxygen reduction reaction activity with methanol tolerance, the Pt and Pd metals were supported on the CB or the N-CNF...
August 15, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335261/nanomaterials-for-cardiac-myocyte-tissue-engineering
#17
REVIEW
Rodolfo Amezcua, Ajay Shirolkar, Carolyn Fraze, David A Stout
Since their synthesizing introduction to the research community, nanomaterials have infiltrated almost every corner of science and engineering. Over the last decade, one such field has begun to look at using nanomaterials for beneficial applications in tissue engineering, specifically, cardiac tissue engineering. During a myocardial infarction, part of the cardiac muscle, or myocardium, is deprived of blood. Therefore, the lack of oxygen destroys cardiomyocytes, leaving dead tissue and possibly resulting in the development of arrhythmia, ventricular remodeling, and eventual heart failure...
July 19, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335257/characteristic-evaluation-of-graphene-oxide-for-bisphenol-a-adsorption-in-aqueous-solution
#18
Thatchaphong Phatthanakittiphong, Gyu Tae Seo
This paper investigates the characteristics of graphene oxide (GO) for Bisphenol A (BPA) adsorption in water. Batch experiments on the influence of significant parameters were performed. While an improvement of the adsorption capacity of BPA was obtained by the increment of contact time and the initial BPA concentration, the increment of pH above 8, GO dosage, and temperature showed the reverse results. The thermodynamic study suggested that BPA adsorption on GO was an exothermic and spontaneous process. The kinetics was explained by the pseudo-second-order model which covers all steps of adsorption...
July 2, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335230/fluorescent-nanocomposite-of-embedded-ceria-nanoparticles-in-crosslinked-pva-electrospun-nanofibers
#19
Nader Shehata, Soha Gaballah, Effat Samir, Aya Hamed, Marwa Saad
This paper introduces a new fluorescent nanocomposite of electrospun biodegradable nanofibers embedded with optical nanoparticles. In detail, this work introduces the fluorescence properties of PVA nanofibers generated by the electrospinning technique with embedded cerium oxide (ceria) nanoparticles. Under near-ultra violet excitation, the synthesized nanocomposite generates a visible fluorescent emission at 520 nm, varying its intensity peak according to the concentration of in situ embedded ceria nanoparticles...
June 1, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335229/tial%C3%A2-tin-composite-nanoparticles-produced-by-hydrogen-plasma-metal-reaction-synthesis-passivation-and-characterization
#20
Ju Ying Li, Qing Song Mei
TiAl₃ and TiN composite nanoparticles were continuously synthesized from Ti-48Al master alloy by hydrogen plasma-metal reaction in a N₂, H₂ and Ar atmosphere. The phase, morphology, and size of the nanoparticles were studied by X-ray diffraction (XRD) and transmission electronic microscopy (TEM). X-ray photoelectron spectroscopy (XPS) and evolved gas analysis (EGA) were used to analyze the surface phase constitution and oxygen content of the nanoparticles. The as-synthesized nanopowders were mainly composed of nearly spherical TiAl₃ and tetragonal TiN phases, with a mean diameter of ~42 nm and mass fractions of 49...
June 1, 2016: Nanomaterials
keyword
keyword
4331
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"