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https://www.readbyqxmd.com/read/29932200/theoretical-study-on-photophysical-properties-of-three-high-water-solubility-polypyridyl-complexes-for-two-photon-photodynamic-therapy
#1
Ying-Tao Liu, Xue Yin, Xiao-Yong Lai, Xin Wang
Two-photon photodynamic therapy (TP-PDT) is a very promising treatment that has drawn much attention in recent years due to its ability to penetrate deeper into tissues and minimize the damage to normal cells. Here, the properties of three highly water soluble Ru(ii) and Zn(ii) polypyridyl complexes as photosensitizers (PSs) were examined, including the one-photon and two-photon absorption (OPA and TPA) spectra, singlet-triplet energy gap (ΔH-L), TPA cross-section and spin-orbit coupling constant via Density Function Theory (DFT) and Time-Dependent Density Functional Theory (TD-DFT)...
June 22, 2018: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/29923623/aerobic-physical-activity-assessed-with-accelerometer-diary-questionnaire-and-interview-in-a-finnish-population-sample
#2
Henna Hukkanen, Pauliina Husu, Harri Sievänen, Kari Tokola, Henri Vähä-Ypyä, Heli Valkeinen, Tomi Mäki-Opas, Jaana H Suni, Tommi Vasankari
This study evaluates the agreement between different methods to assess moderate to vigorous physical activity (MVPA) in a large sample of Finnish adults. Methods were classified and examined pairwise (accelerometer vs diary; questionnaire vs interview). Proportion of participants meeting the aerobic health-enhancing physical activity (HEPA) recommendation was compared pairwise between all four methods. The present study of 1916 adults aged 18-75 years (mean age 50 yrs., 57% women) is a sub-sample of population-based Health 2011 Study conducted by the National Institute of Health and Welfare in Finland...
June 20, 2018: Scandinavian Journal of Medicine & Science in Sports
https://www.readbyqxmd.com/read/29905735/ultra-wideband-and-high-gain-parametric-amplification-in-telecom-wavelengths-with-an-optimally-mode-matched-ppln-waveguide
#3
Yong Meng Sua, Jia-Yang Chen, Yu-Ping Huang
We report a wideband optical parametric amplification (OPA) over 14 THz covering telecom S, C, and L bands with observed maximum parametric gain of 38.3 dB. The OPA is realized through cascaded second-harmonic generation and difference-frequency generation (cSHG-DFG) in a 2 cm periodically poled LiNbO3 (PPLN) waveguide. With tailored cross section geometry, the waveguide is optimally mode matched for efficient cascaded nonlinear wave mixing. We also identify and study the effect of competing nonlinear processes in this cSHG-DFG configuration...
June 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29895859/printed-5-v-organic-operational-amplifiers-for-various-signal-processing
#4
Hiroyuki Matsui, Kazuma Hayasaka, Yasunori Takeda, Rei Shiwaku, Jimin Kwon, Shizuo Tokito
The important concept of printable functional materials is about to cause a paradigm shift that we will be able to fabricate electronic devices by printing methods in air at room temperature. One of the promising applications of the printed electronics is a disposable electronic patch sensing system which can monitor the health conditions without any restraint. Operational amplifiers (OPAs) are an essential component for such sensing system, since an OPA enables a wide variety of signal processing. Here we demonstrate printed OPAs based on complementary organic semiconductor technology...
June 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29879081/creation-characterization-and-assignment-of-opsonic-values-for-a-new-pneumococcal-opa-calibration-serum-panel-ewha-qc-sera-panel-a-for-13-serotypes-erratum
#5
(no author information available yet)
No abstract text is available yet for this article.
June 2018: Medicine (Baltimore)
https://www.readbyqxmd.com/read/29878070/optimization-of-a-precolumn-opa-derivatization-hplc-assay-for-monitoring-of-l-asparagine-depletion-in-serum-during-l-asparaginase-therapy
#6
Mei Zhang, Yong Zhang, Siqi Ren, Zunjian Zhang, Yongren Wang, Rui Song
A method for monitoring l-asparagine (ASN) depletion in patients' serum using reversed-phase high-performance liquid chromatography with precolumn o-phthalaldehyde and ethanethiol (ET) derivatization is described. In order to improve the signal and stability of analytes, several important factors including precipitant reagent, derivatization conditions and detection wavelengths were optimized. The recovery of the analytes in biological matrix was the highest when 4% sulfosalicylic acid (1:1, v/v) was used as a precipitant reagent...
June 6, 2018: Journal of Chromatographic Science
https://www.readbyqxmd.com/read/29867413/transcranial-magnetic-stimulation-to-the-occipital-place-area-biases-gaze-during-scene-viewing
#7
George L Malcolm, Edward H Silson, Jennifer R Henry, Chris I Baker
We can understand viewed scenes and extract task-relevant information within a few hundred milliseconds. This process is generally supported by three cortical regions that show selectivity for scene images: parahippocampal place area (PPA), medial place area (MPA) and occipital place area (OPA). Prior studies have focused on the visual information each region is responsive to, usually within the context of recognition or navigation. Here, we move beyond these tasks to investigate gaze allocation during scene viewing...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29851005/monitoring-the-mitochondrial-dynamics-in-mammalian-cells
#8
Luca Simula, Silvia Campello
Mitochondria exist in a dynamic state inside mammalian cells. They undergo processes of fusion and fission to adjust their shape according to the different cell needs. Different proteins tightly regulate these dynamics: Opa-1 and Mitofusin-1 and Mitofusin-2 are the main profusion proteins, while Drp1 and its different receptors (Mff, Fis1, MiD49, MiD51) regulate mitochondrial fission. The dynamic nature of the mitochondrial network has become evident and detectable, thanks to recent advances in live imaging video microscopy and to the availability of mitochondria-tagged fluorescent proteins...
2018: Methods in Molecular Biology
https://www.readbyqxmd.com/read/29801292/cascaded-interactions-mediated-by-terahertz-radiation
#9
M Hemmer, G Cirmi, K Ravi, F Reichert, F Ahr, L Zapata, O D Mücke, A-L Calendron, H Çankaya, D Schimpf, N H Matlis, F X Kärtner
We investigate a regime of parametric amplification in which the pump and signal waves are spectrally separated by only a few hundreds of GHz frequency - therefore resulting in a sub-THz frequency idler wave. Operating in this regime we find an optical parametric amplifier (OPA) behavior which is highly dissimilar to conventional OPAs. In this regime, we observe multiple three-wave mixing processes occurring simultaneously which results in spectral cascading around the pump and signal wave. Via numerical simulations, we elucidate the processes at work and show that cascaded optical parametric amplification offers a pathway toward THz-wave generation beyond the Manly-Rowe limit and toward the generation of high-energy, sparse frequency-combs...
May 14, 2018: Optics Express
https://www.readbyqxmd.com/read/29784156/lower-ocular-pulse-amplitude-with-dynamic-contour-tonometry-is-associated-with-biopsy-proven-giant-cell-arteritis
#10
Edsel Ing, Christian Pagnoux, Felix Tyndel, Arun Sundaram, Seymour Hershenfeld, Paul Ranalli, Shirley Chow, Tran Le, Carla Lutchman, Susan Rutherford, Kay Lam, Harleen Bedi, Nurhan Torun
OBJECTIVES: To determine the role of the ocular pulse amplitude (OPA) from Pascal dynamic contour tonometry in predicting the temporal artery biopsy (TABx) result in patients with suspected giant cell arteritis (GCA). DESIGN: Prospective validation study. PARTICIPANTS: Adults aged 50 years or older who underwent TABx from March 2015 to April 2017. METHODS: Subjects on high-dose glucocorticoids more than 14 days or without serology before glucocorticoid initiation were excluded...
June 2018: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/29776662/effect-of-the-pore-water-composition-on-the-diffusive-anion-transport-in-argillaceous-low-permeability-sedimentary-rocks
#11
Cornelia Wigger, Luc R Van Loon
The effect of the pore water composition on the diffusive anion transport was studied for two different argillaceous, low permeability sedimentary rocks, Opalinus Clay (OPA) and Helvetic Marl (HM). The samples were saturated with different solutions with varying molar concentration and different main cations in the solution: NaCl based pore solutions and CaCl2 based pore solutions. The total porosity was measured by through-diffusion experiments with the neutral tracer HTO. Experiments performed in NaCl solutions resulted in a porosity of 0...
May 8, 2018: Journal of Contaminant Hydrology
https://www.readbyqxmd.com/read/29775931/a-nanocomposite-optosensor-containing-carboxylic-functionalized-multiwall-carbon-nanotubes-and-quantum-dots-incorporated-into-a-molecularly-imprinted-polymer-for-highly-selective-and-sensitive-detection-of-ciprofloxacin
#12
Naphat Yuphintharakun, Piyaluk Nurerk, Kochaporn Chullasat, Proespichaya Kanatharana, Frank Davis, Dhassida Sooksawat, Opas Bunkoed
A nanocomposite optosensor consisting of carboxylic acid functionalized multiwall carbon nanotubes and CdTe quantum dots embedded inside a molecularly imprinted polymer (COOH@MWCNT-MIP-QDs) was developed for trace ciprofloxacin detection. The COOH@MWCNT-MIP-QDs were synthesized through a facile sol-gel process using ciprofloxacin as a template molecule, 3-aminopropylethoxysilane as a functional monomer and tetraethoxysilane as a cross-linker at a molar ratio of 1:8:20. The synthesized nanocomposite optosensor had high sensitivity, excellent specificity and high binding affinity to ciprofloxacin...
May 10, 2018: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29769544/towards-a-petawatt-class-few-cycle-infrared-laser-system-via-dual-chirped-optical-parametric-amplification
#13
Yuxi Fu, Katsumi Midorikawa, Eiji J Takahashi
Expansion of the wavelength range for an ultrafast laser is an important ingredient for extending its range of applications. Conventionally, optical parametric amplification (OPA) has been employed to expand the laser wavelength to the infrared (IR) region. However, the achievable pulse energy and peak power have been limited to the mJ and the GW level, respectively. A major difficulty in the further energy scaling of OPA results from a lack of suitable large nonlinear crystals. Here, we circumvent this difficulty by employing a dual-chirped optical parametric amplification (DC-OPA) scheme...
May 16, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29760655/neural-codes-for-one-s-own-position-and-direction-in-a-real-world-vista-environment
#14
Valentina Sulpizio, Maddalena Boccia, Cecilia Guariglia, Gaspare Galati
Humans, like animals, rely on an accurate knowledge of one's spatial position and facing direction to keep orientated in the surrounding space. Although previous neuroimaging studies demonstrated that scene-selective regions (the parahippocampal place area or PPA, the occipital place area or OPA and the retrosplenial complex or RSC), and the hippocampus (HC) are implicated in coding position and facing direction within small-(room-sized) and large-scale navigational environments, little is known about how these regions represent these spatial quantities in a large open-field environment...
2018: Frontiers in Human Neuroscience
https://www.readbyqxmd.com/read/29760215/specific-binding-to-differentially-expressed-human-ceacams-determines-the-outcome-of-neisseria-gonorrhoeae-infections-along-the-female-reproductive-tract
#15
Epshita A Islam, Varun C Anipindi, Ian Francis, Yazdan Shaik-Dasthagirisaheb, Stacey Xu, Nelly Leung, Anna Sintsova, Mohsen Amin, Charu Kaushic, Lee M Wetzler, Scott D Gray-Owen
The gonococcal Opa proteins are an antigenically variable family of surface adhesins that bind human CEACAM1, CEACAM3, CEACAM5 and/or CEACAM6, cell surface glycoproteins that are differentially expressed on a broad spectrum of human cells and tissues. While presumed to be important for infection, the significance of various Opa-CEACAM mediated cellular interactions in the context of the genital tract has remained unclear. Here, we observe that CEACAM1 and CEACAM5 are differentially expressed on epithelia lining the upper and lower portions of the human female genital tract, respectively...
May 14, 2018: Infection and Immunity
https://www.readbyqxmd.com/read/29748028/pneumococcal-conjugate-vaccine-triggers-a-better-immune-response-than-pneumococcal-polysaccharide-vaccine-in-patients-with-chronic-lymphocytic-leukemia-a-randomized-study-by-the-swedish-cll-group
#16
Tobias Svensson, Magdalena Kättström, Ylva Hammarlund, Daniel Roth, P-O Andersson, Magnus Svensson, Ingmar Nilsson, Lars Rombo, Honar Cherif, Eva Kimby
AIM: To determine if patients with untreated chronic lymphocytic leukemia (CLL) benefit from vaccination with a 13-valent pneumococcal conjugated vaccine (PCV13), Prevenar13®, compared to a 23-valent pneumococcal polysaccharide vaccine (PPSV23), Pneumovax®, in terms of immune response. BACKGROUND: Streptococcus pneumoniae causes substantial morbidity in patients with CLL, a group known to respond poorly to polysaccharide vaccines. Comparative studies with conjugated vaccines are lacking...
May 7, 2018: Vaccine
https://www.readbyqxmd.com/read/29734745/are-differences-in-physical-activity-across-socioeconomic-groups-associated-with-choice-of-physical-activity-variables-to-report
#17
REVIEW
Ragna Stalsberg, Arve Vorland Pedersen
Despite being challenged in recent years, the hypothesis that individuals of higher socioeconomic status (SES) are more physically active than their lower SES counterparts is generally considered a fact. Recent reviews, however, have suggested that differences across groups might be related to which physical activity (PA) domains have been investigated. In the present review, searches for relevant studies were performed in the MEDLINE, ISI Web of Knowledge and SPORTDiscus databases. Search terms included “socioeconomic”, “socio-economic”, “socio economic” and “social class” to meet all variations of the variable “socioeconomic status” in combination with the term “physical activity”...
May 5, 2018: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/29726680/natural-stilbenoids-have-anti-inflammatory-properties-in-vivo-and-down-regulate-the-production-of-inflammatory-mediators-no-il6-and-mcp1-possibly-in-a-pi3k-akt-dependent-manner
#18
Heikki Eräsalo, Mari Hämäläinen, Tiina Leppänen, Ilari Mäki-Opas, Mirka Laavola, Raisa Haavikko, Jari Yli-Kauhaluoma, Eeva Moilanen
Stilbenoids are a group of polyphenolic compounds found in plants, trees, berries, and nuts. Stilbenoids have been shown to serve an antimicrobial and antifungal function in plants. There is also evidence that as a part of the human diet, stilbenoids play an important role as antioxidants and may have anti-inflammatory effects. The PI3K/Akt pathway is a well-characterized signaling pathway controlling cellular functions involved in growth and cell cycle and in metabolism. There is also increasing evidence to show the involvement of this pathway in the regulation of inflammatory responses...
May 25, 2018: Journal of Natural Products
https://www.readbyqxmd.com/read/29721168/recruitment-of-mitofusin-2-into-lipid-rafts-drives-mitochondria-fusion-induced-by-mdivi-1
#19
Laura Ciarlo, Rosa Vona, Valeria Manganelli, Lucrezia Gambardella, Carla Raggi, Matteo Marconi, Walter Malorni, Maurizio Sorice, Tina Garofalo, Paola Matarrese
The regulation of the mitochondrial dynamics and the balance between fusion and fission processes are crucial for the health and fate of the cell. Mitochondrial fusion and fission machinery is controlled by key proteins such as mitofusins, OPA-1 and several further molecules. In the present work we investigated the implication of lipid rafts in mitochondrial fusion induced by Mdivi-1. Our results underscore the possible implication of lipid "rafts" in mitochondrial morphogenetic changes and their homeostasis...
April 10, 2018: Oncotarget
https://www.readbyqxmd.com/read/29717316/theoretical-design-and-investigation-of-1-8-naphthalimide-based-two-photon-fluorescent-probes-for-detecting-cytochrome-p450-1a-with-separated-fluorescence-signal
#20
Chun Zhang, Ai-Min Ren, Jing-Fu Guo, Dan Wang, Li-Ying Yu
As a type of enzyme with a terminal oxygen, the CYP1A subfamily possesses the ability to catalyze the reactions of many environmental toxins, endogenous substrates and clinical drugs. The development of efficient methods for the rapid and real-time detection of CYP1A enzyme activity in complex biological systems is of considerable significance for identifying potential abnormalities in these cancer-related enzymes. With this goal, we firstly provided a series of 1,8-naphthalimide-based two-photon fluorescent chromophores with large two-photon absorption (TPA) cross-sections (500-7000 GM) and remarkable changes in fluorescence spectra upon recognizing the CYP1A enzyme from its theoretical aspect...
May 16, 2018: Physical Chemistry Chemical Physics: PCCP
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