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https://www.readbyqxmd.com/read/28346374/minimized-bolus-type-wireless-sensor-node-with-a-built-in-three-axis-acceleration-meter-for-monitoring-a-cow-s-rumen-conditions
#1
Hirofumi Nogami, Shozo Arai, Hironao Okada, Lan Zhan, Toshihiro Itoh
Monitoring rumen conditions in cows is important because a dysfunctional rumen system may cause death. Sub-acute ruminal acidosis (SARA) is a typical disease in cows, and is characterized by repeated periods of low ruminal pH. SARA is regarded as a trigger for rumen atony, rumenitis, and abomasal displacement, which may cause death. In previous studies, rumen conditions were evaluated by wireless sensor nodes with pH measurement capability. The primary advantage of the pH sensor is its ability to continuously measure ruminal pH...
March 27, 2017: Sensors
https://www.readbyqxmd.com/read/28345148/fast-self-healing-of-polyelectrolyte-multilayer-nanocoating-and-restoration-of-super-oxygen-barrier
#2
Yixuan Song, Kevin P Meyers, Joseph Gerringer, Ramesh K Ramakrishnan, Mohammad Humood, Shuang Qin, Andreas A Polycarpou, Sergei Nazarenko, Jaime C Grunlan
A self-healable gas barrier nanocoating, which is fabricated by alternate deposition of polyethyleneimine (PEI) and polyacrylic acid (PAA) polyelectrolytes, is demonstrated in this study. This multilayer film, with high elastic modulus, high glass transition temperature, and small free volume, has been shown to be a super oxygen gas barrier. An 8-bilayer PEI/PAA multilayer assembly (≈700 nm thick) exhibits an oxygen transmission rate (OTR) undetectable to commercial instrumentation (<0.005 cc (m(-2) d(-1) atm(-1) ))...
March 27, 2017: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/28343185/frameworking-memory-and-serotonergic-markers
#3
Alfredo Meneses
The evidence for neural markers and memory is continuously being revised, and as evidence continues to accumulate, herein, we frame earlier and new evidence. Hence, in this work, the aim is to provide an appropriate conceptual framework of serotonergic markers associated with neural activity and memory. Serotonin (5-hydroxytryptamine [5-HT]) has multiple pharmacological tools, well-characterized downstream signaling in mammals' species, and established 5-HT neural markers showing new insights about memory functions and dysfunctions, including receptors (5-HT1A/1B/1D, 5-HT2A/2B/2C, and 5-HT3-7), transporter (serotonin transporter [SERT]) and volume transmission present in brain areas involved in memory...
March 27, 2017: Reviews in the Neurosciences
https://www.readbyqxmd.com/read/28340768/sio2-coated-magnetic-graphene-oxide-modified-with-polypyrrole-polythiophene-a-novel-and-efficient-nanocomposite-for-solid-phase-extraction-of-trace-amounts-of-heavy-metals
#4
Karam Molaei, Hasan Bagheri, Ali Akbar Asgharinezhad, Homeira Ebrahimzadeh, Mojtaba Shamsipur
The synthesis of a novel nanocomposite comprised of SiO2-coated magnetic graphene oxide modified with a pyrrole-thiophene (mGO/SiO2@coPPy-Th) copolymer is reported in the present work. The nanocomposite was applied for the fast magnetic solid phase extraction (MSPE) of trace levels of copper, lead, chromium, zinc and cadmium from water and agricultural samples. The nanocomposite was prepared in three steps: (1) decoration of graphene oxide sheets with magnetite nanoparticles thorough a facile one-step chemical reaction strategy; (2) chemical grafting by a silica layer to obtain high stability in acidic solutions; and (3) surface modification by coPPy-Th via simultaneous oxidation polymerization of pyrrole and thiophene in the presence of mGO/SiO2 composite...
May 15, 2017: Talanta
https://www.readbyqxmd.com/read/28339183/tunable-porosity-of-crosslinked-polyhedral-oligomeric-silsesquioxane-poss-supports-for-palladium-catalyzed-aerobic-alcohol-oxidation-in-water
#5
Preeyanuch Sangtrirutnugul, Thanawat Chaiprasert, Warodom Hunsiri, Thanudkit Jitjaroendee, Patsaya Songkhum, Kritapas Laohhasurayotin, Tanakorn Osotchan, Vuthichai Ervithayasuporn
Polyhedral oligomeric silsesquioxane (POSS)-based materials, poly-POSS-Tn [n = 8 (1), 10 (2), 12 (3), and mix (4)], were prepared in high yields via free radical polymerization of corresponding pure forms of methacrylate-functionalized POSS monomers, MMA-POSS-Tn (n = 8, 10, 12), and the mixture form, MMA-POSS-Tmix. Powder X-ray diffraction (XRD) spectra and BET analysis indicate that 1-4 are amorphous materials with high surface areas (683-839 m2•g-1). The surface areas and total pore volumes follow the trend: poly-POSS-T12 > poly-POSS-T10 > poly-POSS-Tmix > poly-POSS-T8...
March 24, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28336835/improving-powder-magnetic-core-properties-via-application-of-thin-insulating-silica-nanosheet-layers-on-iron-powder-particles
#6
Toshitaka Ishizaki, Hideyuki Nakano, Shin Tajima, Naoko Takahashi
A thin, insulating layer with high electrical resistivity is vital to achieving high performance of powder magnetic cores. Using layer-by-layer deposition of silica nanosheets or colloidal silica over insulating layers composed of strontium phosphate and boron oxide, we succeeded in fabricating insulating layers with high electrical resistivity on iron powder particles, which were subsequently used to prepare toroidal cores. The compact density of these cores decreased after coating with colloidal silica due to the substantial increase in the volume, causing the magnetic flux density to deteriorate...
December 23, 2016: Nanomaterials
https://www.readbyqxmd.com/read/28335372/graphene-oxide-bionanocomposite-coatings-with-high-oxygen-barrier-properties
#7
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/28301756/hot-charge-carrier-transmission-from-plasmonic-nanostructures
#8
Phillip Christopher, Martin Moskovits
Surface plasmons have recently been harnessed to carry out processes such as photovoltaic current generation, redox photochemistry, photocatalysis, and photodetection, all of which are enabled by separating energetic (hot) electrons and holes-processes that, previously, were the domain of semiconductor junctions. Currently, the power conversion efficiencies of systems using plasmon excitation are low. However, the very large electron/hole per photon quantum efficiencies observed for plasmonic devices fan the hope of future improvements through a deeper understanding of the processes involved and through better device engineering, especially of critical interfaces such as those between metallic and semiconducting nanophases (or adsorbed molecules)...
March 16, 2017: Annual Review of Physical Chemistry
https://www.readbyqxmd.com/read/28297456/is-the-dose-distribution-distorted-in-imrt-and-rapidarc-treatment-when-patient-plans-are-swapped-across-beam-matched-machines
#9
Chockkalingam Krishnappan, Chandrasekaran Anu Radha, Vendhan Subramani, Madhan Kumar Gunasekaran
The purpose of this study is to evaluate the degree of dose distribution distortion in advanced treatments like IMRT and RapidArc when patient plans are swapped across dosimetrically equivalent so-called "beam-matched" machines. For this purpose the entire work is divided into two stages. At forefront stage all basic beam properties of 6 MV X-rays like PDD, profiles, output factors, TPR20/10 and MLC transmission of two beam-matched machines - Varian Clinac iX and Varian 600 C/D Unique - are compared and evaluated for differences...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28297427/a-comparative-study-of-identical-vmat-plans-with-and-without-jaw-tracking-technique
#10
Hao Wu, Fan Jiang, Haizhen Yue, Qiaoqiao Hu, Jian Zhang, Zhuolun Liu, Jian Gong, Sha Li, Jianhao Geng, Yibao Zhang
The unwanted radiation transmission through the multileaf collimators could be reduced by the jaw tracking technique which is commercially available on Varian TrueBeam accelerators. On the basis of identical plans, this study aims to investigate the dosimetric impact of jaw tracking on the volumetric-modulated arc therapy (VMAT) plans. Using Eclipse treatment planning system (TPS), 40 jaw-tracking VMAT plans with various tumor volumes and shapes were optimized. Fixed jaw plans were created by editing the jaw coordinates of the jaw-tracking plans while other parameters were identical...
September 2016: Journal of Applied Clinical Medical Physics
https://www.readbyqxmd.com/read/28293400/gestational-diabetes-influences-retinal-muller-cells-in-rat-s-offspring
#11
Akramsadat Tabasi, Soraya Ghafari, Mehdi Mehdizadeh, Majid Asadi Shekari, Mohammad Jafar Golalipour
OBJECTIVES: The Muller cell is the principal glial cell of the vertebrate retina. The expression of Glial fibrillary acidic protein (GFAP) in the Muller cells was used as a cellular marker for retinal damage. This study was done to evaluate the effect of gestational diabetes on retinal Muller cells in rat's offspring. MATERIALS AND METHODS: In this experimental study, 12 Wistar rat dams were randomly allocated in control and diabetic groups. Gestational diabetes was induced by 40 mg/kg/body weight of streptozotocin at the first day of gestation, intraperitoneally...
February 2017: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28292022/the-effects-of-the-long-non-coding-rna-malat-1-regulated-autophagy-related-signaling-pathway-on-chemotherapy-resistance-in-diffuse-large-b-cell-lymphoma
#12
Li-Juan Li, Ye Chai, Xiao-Jia Guo, Song-Lin Chu, Lian-Sheng Zhang
OBJECTIVE: Our study aimed to investigate the effects of the long non-coding RNA MALAT-1 (lncRNA MALAT-1) regulated autophagy-related signaling pathway on chemotherapy resistance in diffuse large B-cell lymphoma (DLBCL). METHODS: Human normal B lymphocytes (IM-9I) and DLBCL cell lines (Farage, Pfeiffer, Raji, Daud, Ly1, Ly3, Ly8 and Ly10) were chosen for our experiment. qRT-PCR was applied to detect the expression of lncRNA MALAT-1 in each DLBCL cell line. Farage and Daud cells were induced to be drug-resistant using 0...
March 7, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28290006/exercise-testing-and-stress-imaging-in-mitral-valve-disease
#13
REVIEW
Damien Voilliot, Patrizio Lancellotti
Mitral valve disease represented by mitral stenosis and mitral regurgitation is the second most frequent valvulopathy. Mitral stenosis leads to an increased left atrial pressure whereas mitral regurgitation leads to an increased left atrial pressure associated with a volume overload. Secondary to an upstream transmission of this overpressure, both mitral stenosis and regurgitation lead to pulmonary hypertension and right heart failure. In addition, mitral regurgitation also leads to left ventricular dilatation and dysfunction with left heart failure...
March 2017: Current Treatment Options in Cardiovascular Medicine
https://www.readbyqxmd.com/read/28289400/increased-circulating-exosomal-mirna-223-is-associated-with-acute-ischemic-stroke
#14
Yajing Chen, Yaying Song, Jun Huang, Meijie Qu, Yu Zhang, Jieli Geng, Zhijun Zhang, Jianrong Liu, Guo-Yuan Yang
Recent studies have demonstrated that exosomal microRNAs (miRNAs) are novel biomarkers and therapeutic targets for various diseases including vascular disease. However, specific exosomal miRNAs expression in stroke patients has not been reported yet. Here, we explored whether circulating exosomal miRNAs can serve as potential biomarkers for the diagnosis of acute ischemic stroke and discussed the potential for clinical application. Blood samples were collected from acute ischemic stroke patients within the first 72 h (n = 50)...
2017: Frontiers in Neurology
https://www.readbyqxmd.com/read/28288692/does-cimicifuga-racemosa-have-the-effects-like-estrogen-on-the-sublingual-gland-in-ovariectomized-rats
#15
Yun-Meng Da, Kai-Yu Niu, Shu-Ya Liu, Ke Wang, Wen-Juan Wang, Jing Jia, Li-Hua Qin, Wen-Pei Bai
BACKGROUND: Cimicifuga racemosa is one of the herbs used for the treatment of climacteric syndrome, and it has been cited as an alternative therapy to estrogen. Apart from hectic fevers, dyspareunia and so on, dry mouth also increase significantly after menopause. It has not yet been reported whether C. racemosa has any impact on the sublingual gland, which may relate to dry mouth. In an attempt to determine this, we have compared the effects of estrogen and C. racemosa on the sublingual gland of ovariectomized rats...
March 14, 2017: Biological Research
https://www.readbyqxmd.com/read/28286432/decreased-uptake-and-enhanced-mitochondrial-protection-underlie-reduced-toxicity-of-nanoceria-in-human-monocyte-derived-macrophages
#16
Salik Hussain, Preeti P Kodavanti, Jamie D Marshburn, Agnes Janoshazi, Stella M Marinakos, Margaret George, Annette Rice, Mark R Wiesner, Stavros Garantziotis
Cerium dioxide nanoparticles (nanoceria), currently used as catalysts including additives to diesel fuel, also present potential as a novel therapeutic agent for disorders involving oxidative stress. However, little is known about the effects of nanoceria on primary human cells involved in the innate immune response. Here, we evaluate nanoceria effects on monocyte derived macrophages (MDMs) from healthy human subjects. Peripheral blood monocytes were isolated from healthy human volunteers. MDMs were obtained by maturing monocytes over a five-day period...
December 2016: Journal of Biomedical Nanotechnology
https://www.readbyqxmd.com/read/28283744/serial-block-face-scanning-electron-microscopy-applied-to-study-the-trafficking-of-8d3-coated-gold-nanoparticles-at-the-blood-brain-barrier
#17
Itsaso Cabezón, Elisabet Augé, Manel Bosch, Alison J Beckett, Ian A Prior, Carme Pelegrí, Jordi Vilaplana
Due to the physical and physiological properties of the blood-brain barrier (BBB), the transport of neurotherapeutics from blood to brain is still a pharmaceutical challenge. We previously conducted a series of experiments to explore the potential of the anti-transferrin receptor 8D3 monoclonal antibody (mAb) to transport neurotherapeutics across the BBB. In that study, gold nanoparticles (AuNPs) were coated with the 8D3 antibody and administered intravenously to mice. Transmission electron microscopy was used and a two-dimensional (2D) image analysis was performed to detect the AuNPs in the brain capillary endothelial cells (BCECs) and brain parenchyma...
March 10, 2017: Histochemistry and Cell Biology
https://www.readbyqxmd.com/read/28282549/atomic-resolution-chemical-mapping-of-ordered-precipitates-in-al-alloys-using-energy-dispersive-x-ray-spectroscopy
#18
Sigurd Wenner, Lewys Jones, Calin D Marioara, Randi Holmestad
Scanning transmission electron microscopy (STEM) coupled with energy-dispersive X-ray spectroscopy (EDS) is a common technique for chemical mapping in thin samples. Obtaining high-resolution elemental maps in the STEM is jointly dependent on stepping the sharply focused electron probe in a precise raster, on collecting a significant number of characteristic X-rays over time, and on avoiding damage to the sample. In this work, 80kV aberration-corrected STEM-EDS mapping was performed on ordered precipitates in aluminium alloys...
May 2017: Micron: the International Research and Review Journal for Microscopy
https://www.readbyqxmd.com/read/28276516/electrochemical-tuning-of-the-optical-properties-of-nanoporous-gold
#19
D Jalas, L-H Shao, R Canchi, T Okuma, S Lang, A Petrov, J Weissmüller, M Eich
Using optical in-situ measurements in an electrochemical environment, we study the electrochemical tuning of the transmission spectrum of films from the nanoporous gold (NPG) based optical metamaterial, including the effect of the ligament size. The long wavelength part of the transmission spectrum around 800 nm can be reversibly tuned via the applied electrode potential. The NPG behaves as diluted metal with its transition from dielectric to metallic response shifted to longer wavelengths. We find that the applied potential alters the charge carrier density to a comparable extent as in experiments on gold nanoparticles...
March 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28272803/thyme-oil-encapsulated-in-halloysite-nanotubes-for-antimicrobial-packaging-system
#20
Min Hyeock Lee, Hyun-Sun Seo, Hyun Jin Park
An antimicrobial capsule releasing thyme oil was developed using modified halloysite nanotubes (HNTs). In order to increase the pore volume, HNTs were treated with 5.0 mol/L NaOH solution, which resulted in the encapsulation of more thyme oil molecules inside the HNTs. The morphology of the raw HNTs and NaOH-treated HNTs (N-HNTs) was characterized using transmission electron microscopy and nitrogen adsorption-desorption analysis. The loading capacity increased from 180.7 ± 12.7 to 256.4 ± 16.7 mg thyme oil/g HNT after the NaOH treatment...
March 8, 2017: Journal of Food Science
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