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https://www.readbyqxmd.com/read/28925376/quantification-of-nanoparticle-concentration-in-colloidal-suspensions-by-a-non-destructive-optical-method
#1
Sandhya Clement, Brint Gardner, Wan Aizuddin W Razali, Victoria Coleman, Åsa Jämting, Heather Catchpoole, Ewa M Goldys, Jan Herrmann, Andrei V Zvyagin
The estimation of nanoparticle number concentration in colloidal suspensions is a prerequisite in many procedures, and in particular in multi-stage, low-yield reactions. Here, we describe a rapid, non-destructive method based on optical extinction and dynamic light scattering, which combines measurements using common bench-top instrumentation with a numerical algorithm to calculate the particle size distribution and concentration. These quantities were derived from Mie theory applied to measurements of the optical extinction spectrum of homogeneous, non-absorbing nanoparticles, and the relative particle size distribution of a colloidal suspension...
September 19, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28922620/%C3%AE-pad-fluorescence-scattering-immunoagglutination-assay-for-cancer-biomarkers-from-blood-and-serum
#2
Cayla Baynes, Jeong-Yeol Yoon
A microfluidic paper analytical device (μPAD) was created for the sensitive quantification of cancer antigens, carcinoembryonic antigen (CEA) and carbohydrate antigen 19-9 (CA 19-9), from human whole blood and serum, toward diagnosis and prognosis of colorectal cancer. Anti-CEA and anti-CA 19-9 antibodies were covalently linked to submicron, fluorescent polystyrene particles, loaded, and then dried in the center of the μPAD channel. CEA- or CA 19-9-spiked blood or serum samples were loaded to the inlet of μPAD, and subsequent immunoagglutination changed the fluorescent scatter signals upon ultraviolet (UV) excitation...
September 1, 2017: SLAS Technology
https://www.readbyqxmd.com/read/28922064/erbium-yttrium-aluminum-garnet-laser-activated-sodium-hypochlorite-irrigation-a-promising-procedure-for-minimally-invasive-endodontics
#3
Xiaogang Cheng, Tiantian Tian, Yu Tian, Doudou Xiang, Jun Qiu, Xiaohua Liu, Qing Yu
OBJECTIVE: This study was to evaluate the potential of Erbium:Yttrium Aluminum Garnet laser-activated sodium hypochlorite irrigation (Er:YAG + NaOCl) for minimally invasive endodontics (MIE). BACKGROUND DATA: Er:YAG laser irradiation can dramatically enhance the penetration of NaOCl, which may be a promising protocol for MIE. METHODS: Extracted human teeth were contaminated with Enterococcus faecalis for 4 weeks. The infected canals were then shaped to different apical terminal working widths (ATWW, 15#/0...
September 14, 2017: Photomedicine and Laser Surgery
https://www.readbyqxmd.com/read/28918486/elastic-and-inelastic-light-scattering-spectroscopy-and-its-possible-use-for-label-free-brain-tumor-typing
#4
Edwin Ostertag, Mona Stefanakis, Karsten Rebner, Rudolf W Kessler
This paper presents an approach for label-free brain tumor tissue typing. For this application, our dual modality microspectroscopy system combines inelastic Raman scattering spectroscopy and Mie elastic light scattering spectroscopy. The system enables marker-free biomedical diagnostics and records both the chemical and morphologic changes of tissues on a cellular and subcellular level. The system setup is described and the suitability for measuring morphologic features is investigated. Graphical Abstract Bimodal approach for label-free brain tumor typing...
September 16, 2017: Analytical and Bioanalytical Chemistry
https://www.readbyqxmd.com/read/28913637/chemical-characterization-and-identification-of-pinaceae-pollen-by-infrared-microspectroscopy
#5
Boris Zimmermann
FTIR microspectroscopy, in combination with spectral averaging procedure, enables precise analysis of pollen grains for chemical characterization and identification studies of fresh and fossilised pollen in botany, ecology and palaeosciences. Infrared microspectroscopy (µFTIR) of Pinaceae pollen can provide valuable information on plant phenology, ecophysiology and paleoecology, but measurements are challenging, resulting in unreproducible spectra. The comparative analysis of µFTIR spectra belonging to morphologically different Pinaceae pollen, namely bisaccate Pinus and monosaccate Tsuga pollen, was conducted...
September 14, 2017: Planta
https://www.readbyqxmd.com/read/28910528/a-statistical-mechanical-model-for-adsorption-coupled-with-saft-vr-mie-equation-of-state
#6
Luis Fernando Mercier Franco, Ioannis George Economou, Marcelo Castier
We extend the SAFT-VR Mie equation of state to calculate adsorption isotherms by considering explicitly the residual energy due to the confinement effect. Assuming a square-well potential for the fluid-solid interactions, the structure imposed by the fluid-solid interface is calculated using two different approaches: an empirical expression proposed by Travalloni et al. (Chem. Eng. Sci., 65, 3088-3099, 2010), and a new theoretical expression derived by applying the mean value theorem. Adopting the SAFT-VR Mie (Lafitte et al...
September 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28900641/core-shell-colloidal-particles-with-dynamically-tunable-scattering-properties
#7
Guangnan Meng, Vinothan N Manoharan, Adeline Perro
We design polystyrene-poly(N'-isopropylacrylamide-co-acrylic acid) core-shell particles that exhibit dynamically tunable scattering. We show that under normal solvent conditions the shell is nearly index-matched to pure water, and the particle scattering is dominated by Rayleigh scattering from the core. As the temperature or salt concentration increases, both the scattering cross-section and the forward scattering increase, characteristic of Mie scatterers. The magnitude of the change in the scattering cross-section and scattering anisotropy can be controlled through the solvent conditions and the size of the core...
September 13, 2017: Soft Matter
https://www.readbyqxmd.com/read/28898243/neoatherosclerosis-development-following-bioresorbable-vascular-scaffold-implantation-in-diabetic-and-non-diabetic-swine
#8
Nienke S van Ditzhuijzen, Mie Kurata, Mieke van den Heuvel, Oana Sorop, Richard W B van Duin, Ilona Krabbendam-Peters, Jurgen Ligthart, Karen Witberg, Magdalena Murawska, Brett Bouma, Martin Villiger, Hector M Garcia-Garcia, Patrick W Serruys, Felix Zijlstra, Gijs van Soest, Dirk-Jan Duncker, Evelyn Regar, Heleen M M van Beusekom
BACKGROUND: DM remains a risk factor for poor outcome after stent-implantation, but little is known if and how DM affects the vascular response to BVS. AIM: The aim of our study was to examine coronary responses to bioresorbable vascular scaffolds (BVS) in swine with and without diabetes mellitus fed a 'fast-food' diet (FF-DM and FF-NDM, respectively) by sequential optical coherence tomography (OCT)-imaging and histology. METHODS: Fifteen male swine were evaluated...
2017: PloS One
https://www.readbyqxmd.com/read/28884930/retreatment-with-sofosbuvir-ledipasvir-with-or-without-lead-in-interferon-%C3%AE-injections-in-patients-infected-with-genotype-1b-hcv-after-unsuccessful-daclatasvir-asunaprevir-therapy
#9
Hayato Uemura, Yoshihito Uchida, Jun-Ichi Kouyama, Kayoko Naiki, Shinpei Yamaba, Akira Fuchigami, Yoichi Saito, Keisuke Shiokawa, Yohei Fujii, Hiroshi Uchiya, Manabu Nakazawa, Satsuki Ando, Masamitsu Nakao, Daisuke Motoya, Kayoko Sugawara, Mie Inao, Yukinori Imai, Nobuaki Nakayama, Tomoaki Tomiya, Satoshi Mochida
AIMS: To improve the therapeutic efficacy of sofosbuvir/ledipasvir for the retreatment of patients after daclatasvir/asunaprevir, a customized therapy with or without lead-in interferon-β injections was performed according to the types of resistance-associated substitutions (RASs) in the NS5A region of genotype 1b HCV. METHODS: Thirty-three patients failing prior daclatasvir/asunaprevir received sofosbuvir/ledipasvir for 12 weeks. Patients with HCV carrying unfavorable NS5A-RASs and/or those with previous simeprevir administration were given lead-in interferon-β injections twice a day for 2 weeks; sequential changes in the NS5A-RASs during the injection period were evaluated using deep sequencing...
September 8, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28883391/ultrawide-thermal-free-carrier-tuning-of-dielectric-antennas-coupled-to-epsilon-near-zero-substrates
#10
Prasad P Iyer, Mihir Pendharkar, Chris J Palmstrøm, Jon A Schuller
The principal challenge for achieving reconfigurable optical antennas and metasurfaces is the need to generate continuous and large tunability of subwavelength, low-Q resonators. We demonstrate continuous and steady-state refractive index tuning at mid-infrared wavelengths using temperature-dependent control over the low-loss plasma frequency in III-V semiconductors. In doped InSb we demonstrate nearly two-fold increase in the electron effective mass leading to a positive refractive index shift (Δn > 1...
September 7, 2017: Nature Communications
https://www.readbyqxmd.com/read/28881406/the-circadian-expression-of-piezo1-trpv4-connexin26-and-vnut-associated-with-the-expression-levels-of-the-clock-genes-in-mouse-primary-cultured-urothelial-cells
#11
Tatsuya Ihara, Takahiko Mitsui, Yuki Nakamura, Mie Kanda, Sachiko Tsuchiya, Satoru Kira, Hiroshi Nakagomi, Norifumi Sawada, Yuri Hirayama, Keisuke Shibata, Eiji Shigetomi, Yoichi Shinozaki, Mitsuharu Yoshiyama, Atsuhito Nakao, Masayuki Takeda, Schuichi Koizumi
AIMS: To investigate circadian gene expressions in the mouse bladder urothelium to establish an experimental model and study the functions of the circadian rhythm. METHODS: The gene expression rhythms of the clock genes, mechano-sensors such as Piezo1 and TRPV4, ATP release mediated molecules (ARMM) such as Cx26 and VNUT were investigated in mouse primary cultured urothelial cells (UCs) of wild-type (WT) and Clock mutant (Clock(Δ19)(/Δ)(19) ) mice using quantitative real-time reverse transcription polymerase chain reaction (qRT-PCR) and western blotting analysis...
September 7, 2017: Neurourology and Urodynamics
https://www.readbyqxmd.com/read/28877257/rosmarinic-acid-potentiates-carnosic-acid-induced-apoptosis-in-lung-fibroblasts
#12
Sana Bahri, Frédérique Mies, Ridha Ben Ali, Mona Mlika, Saloua Jameleddine, Kathleen Mc Entee, Vadim Shlyonsky
Pulmonary fibrosis is characterized by over-population and excessive activation of fibroblasts and myofibroblasts disrupting normal lung structure and functioning. Rosemary extract rich in carnosic acid (CA) and rosmarinic acid (RA) was reported to cure bleomycin-(BLM)-induced pulmonary fibrosis. We demonstrate that CA decreased human lung fibroblast (HLF) viability with IC50 value of 17.13±1.06 μM, while RA had no cytotoxic effect. In the presence of 50 μM of RA, dose-response for CA shifted to IC50 value of 11...
2017: PloS One
https://www.readbyqxmd.com/read/28873922/higher-education-beyond-faculties-interdisciplinary-education-in-care-and-technology
#13
Anne-Mie A G Sponselee, Joost Van Hoof
A Centre of Healthcare and Technology of a Dutch University of Applied Sciences, is presented - and illustrated by project examples - to show how the transitions in the sectors of health care and technology can result in interdisciplinary education in care and technology by means of higher education beyond faculties.
2017: Studies in Health Technology and Informatics
https://www.readbyqxmd.com/read/28872737/a-case-of-chronic-hepatitis-caused-by-hepatitis-c-virus-exhibiting-a-discrepancy-between-serogroup-and-genotype-because-of-inter-genotypic-2b-1b-recombination-a-pitfall-in-antiviral-therapy-with-direct-acting-antivirals
#14
Hayato Kurata, Yoshihito Uchida, Jun-Ichi Kouyama, Kayoko Naiki, Manabu Nakazawa, Satsuki Ando, Masamitsu Nakao, Daisuke Motoya, Kayoko Sugawara, Mie Inao, Yukinori Imai, Nobuaki Nakayama, Tomoaki Tomiya, Satoshi Mochida
A 40-year-old male patient with virologic relapse after daclatasvir plus asunaprevir therapy for a serogroup 1 HCV infection visited our hospital for retreatment. Virologic examinations revealed that a genotype 2b HCV strain carrying both NS3-S122N/D168A and NS5A-R30Q/L31M/Q54H/Y93H mutations had relapsed. The patient received sofosbuvir plus ribavirin therapy, but virologic relapse occurred once again. Sequencing of the HCV genome clarified an inter-genotypic recombination of 2b and 1b with an estimated crossover point between nt3,114 and nt3,115, corresponding to the N-terminal end of the NS3 region (DDBJ/EMBL/GenBank databases accession numbers LC273304)...
September 5, 2017: Hepatology Research: the Official Journal of the Japan Society of Hepatology
https://www.readbyqxmd.com/read/28872053/ambient-pressure-phase-transitions-over-ir-111-at-the-onset-of-co-oxidation
#15
Niclas Johansson, Mie Andersen, Yuji Monya, Jesper N Andersen, Hiroshi Kondoh, Joachim Schnadt, Jan Knudsen
In this study we report on the adsorbate structures on an Ir(111) surface during the phase transition from the inactive to the active state during CO oxidation. The CO oxidation over Pt(111) is used as a reference case. Where Pt(111) either is inactive and CO covered or active and O covered, Ir(111) exhibits a transition state with co-existing chemisorbed O and CO. The observed structural differences are explained in terms of DFT-calculated adsorption energies. For Pt(111) the repulsive CO-O interaction makes co-existing chemisorbed CO and O unfavourable, while for Ir(111) the stronger O and CO adsorption allows for overcoming the repulsive interaction...
September 5, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28871514/a-scoping-review-of-economic-evaluations-alongside-randomised-controlled-trials-of-home-monitoring-in-chronic-disease-management
#16
REVIEW
Kristian Kidholm, Mie Borch Dahl Kristensen
Many countries have considered telemedicine and home monitoring of patients as a solution to the demographic challenges that health-care systems face. However, reviews of economic evaluations of telemedicine have identified methodological problems in many studies as they do not comply with guidelines. The aim of this study was to examine economic evaluations alongside randomised controlled trials of home monitoring in chronic disease management and hereby to explore the resources included in the programme costs, the types of health-care utilisation that change as a result of home monitoring and discuss the value of economic evaluation alongside randomised controlled trials of home monitoring on the basis of the studies identified...
September 4, 2017: Applied Health Economics and Health Policy
https://www.readbyqxmd.com/read/28864630/a-pet-ct-based-strategy-is-a-stronger-predictor-of-survival-than-a-standard-imaging-strategy-in-patients-with-head-and-neck-squamous-cell-carcinoma
#17
Max Rohde, Anne L Nielsen, Manan Pareek, Jørgen Johansen, Jens A Sørensen, Anabel Diaz, Mie K Nielsen, Janus M Christiansen, Jon T Asmussen, Nina Nguyen, Oke Gerke, Anders Thomassen, Abass Alavi, Poul Flemming Høilund-Carlsen, Christian Godballe
Purpose: To examine whether tumor staging by upfront (18)F-fluoro-deoxy-glucose-positron emission tomography/computed tomography (PET/CT) leads to improved discrimination of survival, when compared with traditionally used imaging strategies based on chest X-ray + head and neck magnetic resonance imaging (CXR/MRI) or chest computed tomography + head and neck MRI (CCT/MRI) in patients with head and neck squamous cell carcinoma (HNSCC). Methods: Blinded prospective cohort study based on paired data. Consecutive patients with histologically verified primary HNSCC were recruited at Odense University Hospital from September 2013 to March 2016...
September 1, 2017: Journal of Nuclear Medicine: Official Publication, Society of Nuclear Medicine
https://www.readbyqxmd.com/read/28863506/free-energy-models-for-ice-vii-and-liquid-water-derived-from-pressure-entropy-and-heat-capacity-relations
#18
Philip C Myint, Lorin X Benedict, Jonathan L Belof
We present equations of state relevant to conditions encountered in ramp and multiple-shock compression experiments of water. These experiments compress water from ambient conditions to pressures as high as about 14 GPa and temperatures of up to several hundreds of Kelvin. Water may freeze into ice VII during this process. Although there are several studies on the thermodynamic properties of ice VII, an accurate and analytic free energy model from which all other properties may be derived in a thermodynamically consistent manner has not been previously determined...
August 28, 2017: Journal of Chemical Physics
https://www.readbyqxmd.com/read/28856053/microscope-objective-based-4%C3%AF-spectroscopic-tissue-scattering-goniometry
#19
Z J Simmons, J D Rogers
The measurement of optical scattering as a function of angle, goniometry, can provide a wealth of information about tissue. The goniometry technique described here measures the intensity profile at the pupil planes of two microscope objectives with a scattering sample between them. The maximum observable scattering angle is extended by employing off-axis illumination. This configuration permits several advantages including: i) rapid measurement of scattering into 4π sr to characterize the entire scattering phase function in isotropic tissue, ii) sensitivity to axially asymmetric scattering from anisotropic fibrous tissue, iii) selective interrogation of small regions within spatially inhomogenous tissue, iv) concurrent measurement of scattering coefficient μs , and v) measurement of wavelength dependent scattering properties via spectrally tunable source...
August 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28851336/inhibition-of-human-cytomegalovirus-immediate-early-gene-expression-and-replication-by-the-ethyl-acetate-etoac-fraction-of-elaeocarpus-sylvestris-in-vitro
#20
Sohee Bae, Se Chan Kang, Yoon-Jae Song
BACKGROUND: In immunocompromised patients, human cytomegalovirus (HCMV) infection can lead to severe, life-threatening diseases, such as pneumonitis, hepatitis, gastrointestinal tract disease, and retinitis. We previously reported that a 70% ethanol extract of Elaeocarpus sylvestris leaves (ESE) inhibits human cytomegalovirus (HCMV) replication in vitro. In the present study, we determined the solvent fraction of ESE that inhibits HCMV replication using activity-guided fractionation. METHODS: Activity-guided fractionation of ESE was performed to determine the solvent fraction that inhibits HCMV replication...
August 29, 2017: BMC Complementary and Alternative Medicine
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