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https://www.readbyqxmd.com/read/28821153/combination-of-microsized-mineral-particles-and-rosin-as-a-basis-for-converting-cellulosic-fibers-into-sticky-superhydrophobic-paper
#1
Xiaoyan Yu, Peiwen Bian, Yang Xue, Xueren Qian, Haipeng Yu, Wenshuai Chen, Xiaohai Hu, Peng Wang, Dong Wu, Qinghui Duan, Limei Li, Jing Shen, Yonghao Ni
The unique features of cellulosic paper including flexibility, biodegradability, and low cost enables it as a versatile, sustainable biomaterial for promising applications. In the paper industry, microsized mineral particles are widely used in the production of printing/writing paper grades, while rosin derived from trees is the earliest internal sizing agent for paper hydrophobication. On the basis of existing commercial practices associated with the use of mineral particles and rosin in paper production, we present a process concept of converting cellulosic fibers (paper-grade pulp) into "sticky" superhydrophobic paper involving the use of microsized mineral particles and rosin (a tree-derived natural product, mainly a mixture of resin acids, especially abietic acid with chemical formula of C19H29COOH)...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28821112/electrospun-hypromellose-based-hydrophilic-composites-for-rapid-dissolution-of-poorly-water-soluble-drug
#2
Qing Wang, Deng-Guang Yu, Ling-Ling Zhang, Xin-Kuan Liu, Yang-Chao Deng, Min Zhao
Hypromellose (HPMC)-based hydrophilic composites (HCs) used for rapid dissolution of ferulic acid (FA) were investigated. Electrospun and casting HCs were prepared from a solution containing HPMC, FA, and polyethylene glycol. Ethanol was used as sheath fluid during coaxial processes, and the effects of its flow rates on the Taylor cone and straight fluid jet were investigated. The morphology, component state, hydrophilicity, and drug dissolution rate of the HCs were characterized. Results demonstrated that all HCs were amorphous materials, and their components were compatible...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28815352/two-patterns-of-contrast-enhanced-ultrasonography-with-sonazoid-%C3%A2-in-spontaneous-rupture-of-hepatocellular-carcinoma-a-report-of-four-cases
#3
Takaaki Sugihara, Masahiko Koda, Toshiaki Okamoto, Kenichi Miyoshi, Tomomitsu Matono, Hajime Isomoto
Spontaneous rupture is a life-threatening complication of hepatocellular carcinoma (HCC). Detecting active bleeding is critical. Color Doppler and contrast-enhanced ultrasonography (CEUS) with Levovist(®) are reported to be useful for detecting active bleeding. A few reports have described using Sonazoid(®) to detect bleeding in ruptured HCC. This report describes two distinctive patterns of bleeding from ruptured HCC observed in CEUS with Sonazoid(®). Four patients with suspected HCC rupture were examined by gray-scale ultrasonography (US) and then CEUS with Sonazoid(®)...
August 16, 2017: Journal of Medical Ultrasonics
https://www.readbyqxmd.com/read/28814580/ventrain-from-theory-to-practice-bridging-until-re-tracheostomy
#4
Bianca Maria Wahlen, Hassan Al-Thani, Ayman El-Menyar
Imminent upper airway obstruction due to life-threatening tracheal stenosis of any cause is challenging. A 77-year-old woman, with a history of temporal tracheostomy for prolonged mechanical ventilation, presented with life-threatening tracheal stenosis to the emergency department. After failed intubation with a 5.0 mm internal diameter endotracheal tube, the patient was ventilated via a tube exchanger using Ventrain. Ventrain is a manual ventilation device that, in addition to oxygen supply during inspiration, initiates expiration by actively removing gas from the lungs by suction...
August 16, 2017: BMJ Case Reports
https://www.readbyqxmd.com/read/28813613/methacholine-challenge-comparison-of-airway-responsiveness-produced-by-a-vibrating-mesh-nebulizer-versus-a-jet-nebulizer
#5
Christianne M Blais, Donald W Cockcroft, Justine Veilleux, Marie-Ève Boulay, Louis-Philippe Boulet, Gail M Gauvreau, Tara X Scime, Richard M Watson, Paul M O'Byrne, Beth E Davis
BACKGROUND: The latest methacholine challenge testing (MCT) guidelines published by the European Respiratory Society recommend the characterization of nebulizers before their use in clinics and research. Such investigations are necessary for accurately determining the provocative dose of methacholine causing a 20% fall in FEV1 (PD20) delivered by a given device. The standard English Wright (Wright) jet nebulizer recommended in the 1999 guidelines by the American Thoracic Society has become difficult to obtain and possesses some characteristics that complicate the calculation of dose delivery from this device (e...
August 16, 2017: Journal of Aerosol Medicine and Pulmonary Drug Delivery
https://www.readbyqxmd.com/read/28808947/the-sydney-heart-bank-improving-translational-research-while-eliminating-or-reducing-the-use-of-animal-models-of-human-heart-disease
#6
REVIEW
C G Dos Remedios, S P Lal, A Li, J McNamara, A Keogh, P S Macdonald, R Cooke, E Ehler, R Knöll, S B Marston, J Stelzer, H Granzier, C Bezzina, S van Dijk, F De Man, G J M Stienen, J Odeberg, F Pontén, W Linke, J van der Velden
The Sydney Heart Bank (SHB) is one of the largest human heart tissue banks in existence. Its mission is to provide high-quality human heart tissue for research into the molecular basis of human heart failure by working collaboratively with experts in this field. We argue that, by comparing tissues from failing human hearts with age-matched non-failing healthy donor hearts, the results will be more relevant than research using animal models, particularly if their physiology is very different from humans. Tissue from heart surgery must generally be used soon after collection or it significantly deteriorates...
August 14, 2017: Biophysical Reviews
https://www.readbyqxmd.com/read/28805861/site-dependent-effects-of-methylation-on-the-electronic-spectra-of-jet-cooled-methylated-xanthine-compounds
#7
Doory Kim, Key Young Yang, Hyung Min Kim, Tae-Rae Kim, Nam Joon Kim, Seokmin Shin, Seong Keun Kim
We obtained the electronic spectra of various methylated xanthine compounds including caffeine in a supersonic jet by resonant two-photon ionization spectroscopy. The methyl group in the tested methylated xanthine compounds has a distinct, site-dependent effect on the electronic spectrum. Methylation at the N3 position causes a significant red shift of the ππ* state, whereas methylation at the N1 position has only minimal effects on the electronic spectrum. The notably broad spectra of theobromine and caffeine result from methyl substitution at the N7 position, which causes a large displacement between the potential energy surfaces of the S0 and S1 states, and a strong vibronic coupling...
August 14, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28804874/high-frequency-jet-ventilation-for-motion-management-during-ablation-procedures-a-narrative-review
#8
REVIEW
K Galmén, P Harbut, J Freedman, J G Jakobsson
BACKGROUND: High frequency jet ventilation (HFJV) is a method of ventilation that has gained renewed interest over the recent years as it can reduce organ movement to near static conditions, thus enhancing surgical precision in minimal invasive procedures, for example, ablation procedures for atrial fibrillation and solid organ tumours. The aim of this review was to create a summary of the current evidence concerning the clinical use of HFJV for ablative procedures. METHOD: PubMed was searched for the key words high frequency ventilation and ablation January 1990-December 2016...
August 13, 2017: Acta Anaesthesiologica Scandinavica
https://www.readbyqxmd.com/read/28803685/quantification-of-pulmonary-regurgitation-by-vector-flow-mapping-in-congenital-heart-patients-after-repair-of-right-ventricular-outflow-obstruction-a-preliminary-study
#9
Ashley Hoi-Man To, Vivian Wing-Yi Li, Ming-Yen Ng, Yiu-Fai Cheung
BACKGROUND: Vector flow mapping (VFM) enables direct visualization of flow pattern and estimation of flow volume. The aim of this study was to determine its accuracy in the quantification of pulmonary regurgitation (PR) in congenital heart patients after repair of right ventricular (RV) outflow obstruction. METHODS: This study comprised two parts: (1) validation of VFM in the quantification of PR in patients with repaired tetralogy of Fallot by cardiac magnetic resonance and (2) clinical application of VFM to determine PR in patients after biventricular repair of pulmonary atresia and stenosis with intact ventricular septum...
August 10, 2017: Journal of the American Society of Echocardiography
https://www.readbyqxmd.com/read/28800992/new-approaches-to-airway-management-in-tracheal-resections-a-systematic-review-and-meta-analysis
#10
Mark Schieren, Andreas Böhmer, Fabian Dusse, Aris Koryllos, Frank Wappler, Jerome Defosse
OBJECTIVES: Although endotracheal intubation, surgical crossfield intubation, and jet ventilation are standard techniques for airway management in tracheal resections, there are also reports of new approaches, ranging from regional anesthesia to extracorporeal support. The objective was to outline the entire spectrum of new airway techniques. DESIGN: The literature databases PubMed/Medline and the Cochrane Library were searched systematically for prospective and retrospective trials as well as case reports on tracheal resections...
August 2017: Journal of Cardiothoracic and Vascular Anesthesia
https://www.readbyqxmd.com/read/28799389/dispersed-fluorescence-spectroscopy-of-the-sicn-a%C3%AC-2-%C3%AE-x%C3%AC-2-%C3%AE-system-observation-of-some-vibrational-levels-with-chaotic-characteristics
#11
Masaru Fukushima, Takashi Ishiwata
The laser induced fluorescence (LIF) spectrum of the à (2)Δ - X̃ (2)Π transition was obtained for SiCN generated by laser ablation under supersonic free jet expansion. The vibrational structures of the dispersed fluorescence (DF) spectra from single vibronic levels (SVL's) were analyzed with consideration of the Renner-Teller (R-T) interaction. Analysis of the pure bending (ν2) structure by a perturbation approach including R-T, anharmonicity, spin-orbit (SO), and Herzberg-Teller (H-T) interactions indicated considerably different spin splitting for the μ and κ levels of the X̃ (2)Π state of SiCN, in contrast to identical spin splitting for general species derived from the perturbation approach, where μ and κ specify the lower and upper levels, respectively, separated by R-T...
December 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28799347/ultrafast-%C3%AE-cc-bond-cleavage-of-acetone-upon-excitation-to-3p-and-3d-rydberg-states-by-femtosecond-time-resolved-photoelectron-imaging
#12
O Hüter, F Temps
The radiationless electronic relaxation and α -CC bond fission dynamics of jet-cooled acetone in the S1 (nπ(*)) state and in high-lying 3p and 3d Rydberg states have been investigated by femtosecond time-resolved mass spectrometry and photoelectron imaging. The S1 state was accessed by absorption of a UV pump photon at selected wavelengths between λ = 320 and 250 nm. The observed acetone mass signals and the S1 photoelectron band decayed on sub-picosecond time scales, consistent with a recently proposed ultrafast structural relaxation of the molecules in the S1 state away from the Franck-Condon probe window...
December 7, 2016: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28799201/new-experimental-reference-data-for-hexafluorinated-propanol-by-exploring-an-unusual-intermolecular-torsional-balance
#13
Sönke Oswald, Martin A Suhm
The hydrogen-bonded dimer of 1,1,1,3,3,3-hexafluoro-2-propanol forms an intermolecular -OH...O- torsional balance, in which the acceptor OH group can point away from or towards the fluorines of the donor. It prefers the former arrangement in the free dimer, but dinitrogen coordination of the acceptor OH favors the latter, as FTIR spectroscopy in supersonic jets suggests. A multi-step divide-and-conquer strategy was employed to rule out density functional and other inexpensive quantum chemical methods within the harmonic approximation...
August 11, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28798854/microfluidic-measurement-for-blood-flow-and-platelet-adhesion-around-a-stenotic-channel-effects-of-tile-size-on-the-detection-of-platelet-adhesion-in-a-correlation-map
#14
Sung Yong Jung, Eunseop Yeom
Platelet aggregation affects the surrounding blood flow and usually occurs where a blood vessel is narrowed as a result of atherosclerosis. The relationship between blood flow and platelet aggregation is not yet fully understood. This study proposes a microfluidic method to measure the velocity and platelet aggregation simultaneously by combining the micro-particle image velocimetry technique and a correlation mapping method. The blood flow and platelet adhesion procedure in a stenotic micro-channel with 90% severity were observed for a relatively long period of 4 min...
March 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28798398/shedding-new-light-on-the-crab-with-polarized-x-rays
#15
M Chauvin, H-G Florén, M Friis, M Jackson, T Kamae, J Kataoka, T Kawano, M Kiss, V Mikhalev, T Mizuno, N Ohashi, T Stana, H Tajima, H Takahashi, N Uchida, M Pearce
Strong magnetic fields, synchrotron emission, and Compton scattering are omnipresent in compact celestial X-ray sources. Emissions in the X-ray energy band are consequently expected to be linearly polarized. X-ray polarimetry provides a unique diagnostic to study the location and fundamental mechanisms behind emission processes. The polarization of emissions from a bright celestial X-ray source, the Crab, is reported here for the first time in the hard X-ray band (~20-160 keV). The Crab is a complex system consisting of a central pulsar, a diffuse pulsar wind nebula, as well as structures in the inner nebula including a jet and torus...
August 10, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28795521/liquid-tubule-formation-and-stabilization-using-cellulose-nanocrystal-surfactants
#16
Xubo Liu, Shaowei Shi, Yanan Li, Joe Forth, Dong Wang, Thomas P Russell
Structured liquids, generated by the in situ interfacial generation, assembly and jamming of nanoparticle (NP)-surfactants at liquid interfaces, maintain all the desirable characteristics of each liquid, while providing a spatially structured frame work. Here, we show that rod-like cellulose nanocrystal (CNC)-based NP-surfactants, termed CNC-surfactants, are formed rapidly at the liquid/liquid interface, assemble into a monolayer, and, when jammed, offer a robust assembly with exceptional mechanical properties...
August 9, 2017: Angewandte Chemie
https://www.readbyqxmd.com/read/28792015/phenol-selective-mass-spectrometric-analysis-of-jet-fuel
#17
Haoxuan Zhu, Eric Janusson, Jingwei Luo, James Piers, Farhana Islam, G Bryce McGarvey, Allen G Oliver, Ori Granot, J Scott McIndoe
Bromobenzyl compounds react selectively with phenols via the Williamson ether synthesis. An imidazolium charge-tagged bromobenzyl compound can be used to reveal phenol impurities in jet fuel by analysis via electrospray ionization mass spectrometry. The complex matrix as revealed by Cold EI GC/MS analysis is reduced to a few simple sets of compounds in the charge-tagged ESI mass spectrum, primarily substituted phenols and thiols. Examination of jet fuels treated by different refinery methods reveals the efficacy of these approaches in removing these contaminants...
August 9, 2017: Analyst
https://www.readbyqxmd.com/read/28791811/a-laboratory-study-evaluating-the-ph-of-various-modern-root-canal-filling-materials
#18
Małgorzata Pawińska, Grzegorz Szczurko, Anna Kierklo, Jarosław Sidun
BACKGROUND: Alkaline pH is responsible for antibacterial activity and the stimulation of periapical tissue healing. It neutralizes the acidic environment of inflammatory tissues in the periapical region of the teeth and favors bone repair by activating tissue enzymes. OBJECTIVES: The aim of this study was to evaluate and compare in vitro the pH of 8 root canal filling materials (sealers and points) -AH Plus Jet (AH), Apexit Plus (AP), Endomethasone N (END), Epiphany (EP), GuttaFlow (GF), gutta-percha (G), Resilon (R), Tubliseal (T)...
May 2017: Advances in Clinical and Experimental Medicine: Official Organ Wroclaw Medical University
https://www.readbyqxmd.com/read/28790392/fabrication-of-water-jet-resistant-and-thermally-stable-superhydrophobic-surfaces-by-spray-coating-of-candle-soot-dispersion
#19
Talal F Qahtan, Mohammed A Gondal, Ibrahim O Alade, Mohammed A Dastageer
A facile synthesis method for highly stable carbon nanoparticle (CNP) dispersion in acetone by incomplete combustion of paraffin candle flame is presented. The synthesized CNP dispersion is the mixture of graphitic and amorphous carbon nanoparticles of the size range of 20-50 nm and manifested the mesoporosity with an average pore size of 7 nm and a BET surface area of 366 m(2)g(-1). As an application of this material, the carbon nanoparticle dispersion was spray coated (spray-based coating) on a glass surface to fabricate superhydrophobic (water contact angle > 150° and sliding angle < 10 °) surfaces...
August 8, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28782710/use-of-nebulized-milrinone-in-cardiac-surgery-comparison-of-vibrating-mesh-and-simple-jet-nebulizers
#20
Paul Gavra, Maxime Laflamme, André Y Denault, Yves Théôret, Louis P Perrault, France Varin
Cardiopulmonary bypass triggers an ischemia-reperfusion injury with endothelial dysfunction in the pulmonary circulation which can result in pulmonary hypertension. Inhaled milrinone reduces this reperfusion phenomenon and two methods commonly available for administering it are simple jet and vibrating mesh nebulization. However, neither their generated milrinone particle size profiles, nor their ability to aid endothelial relaxation have been compared. Simple jet and vibrating mesh particle size distributions of milrinone were verified through cascade impaction and their efficacy was tested on a cardiopulmonary bypass (CPB) swine model...
August 4, 2017: Pulmonary Pharmacology & Therapeutics
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