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https://www.readbyqxmd.com/read/28719816/sulfate-radical-induced-degradation-of-%C3%AE-2-adrenoceptor-agonists-salbutamol-and-terbutaline-phenoxyl-radical-dependent-mechanisms
#1
Lei Zhou, Mohamad Sleiman, Corinne Ferronato, Jean-Marc Chovelon, Pascal de Sainte-Claire, Claire Richard
The present study investigated the reactivity and oxidation mechanisms of salbutamol (SAL) and terbutaline (TBL), two typical β2-adrenoceptor agonists, towards sulfate radical (SO4(-)) by using photo-activated persulfate (PS). The reaction pathways and mechanisms were proposed based on products identification using high resolution HPLC-ESI-MS, laser flash photolysis (LFP) and molecular orbital calculations. The results indicated that SO4(-) was the dominant reactive species in the UV/PS process. The second-order rate constants of sulfate radical reaction with SAL and TBL were measured as (3...
July 14, 2017: Water Research
https://www.readbyqxmd.com/read/28719021/high-temperature-ionic-epitaxy-of-halide-perovskite-thin-film-and-the-hidden-carrier-dynamics
#2
Yiping Wang, Xin Sun, Zhizhong Chen, Yi-Yang Sun, Shengbai Zhang, Toh-Ming Lu, Esther Wertz, Jian Shi
High-temperature vapor phase epitaxy (VPE) has been proved ubiquitously powerful in enabling high-performance electro-optic devices in III-V semiconductor field. A typical example is the successful growth of p-type GaN by VPE for blue light-emitting diodes. VPE excels as it controls film defects such as point/interface defects and grain boundary, thanks to its high-temperature processing condition and controllable deposition rate. For the first time, single-crystalline high-temperature VPE halide perovskite thin film has been demonstrated-a unique platform on unveiling previously uncovered carrier dynamics in inorganic halide perovskites...
July 18, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28718920/microcapsules-biologically-prepared-using-perilla-frutescens-l-britt-essential-oil-and-their-use-for-extension-of-fruit-shelf-life
#3
Na Li, Zhi-Jun Zhang, Xiao-Jun Li, Hui-Zhen Li, Li-Xia Cui, Dong-Liang He
BACKGROUND: Perilla EO possess high antioxidant, antimicrobial and insecticidal activities, and have proven to be more reliable than chemically synthesized food preservatives. Nevertheless, EOs have disadvantages of facile photo-degradation and oxidation which limits their use in agriculture and food industries. Microencapsulation technology that generates a polymeric coating surrounding EOs could overcome these disadvantages. RESUILS: The EO concentration had a significant effect on encapsulation efficiency (EE) and loading capacity (LC)...
July 18, 2017: Journal of the Science of Food and Agriculture
https://www.readbyqxmd.com/read/28718766/structural-insights-into-the-light-driven-auto-assembly-process-of-the-water-oxidizing-mn4cao5-cluster-in-photosystem-ii
#4
Miao Zhang, Martin Bommer, Ruchira Chatterjee, Rana Hussein, Junko Yano, Holger Dau, Jan Kern, Holger Dobbek, Athina Zouni
In plants, algae and cyanobacteria, Photosystem II (PSII) catalyzes the light-driven splitting of water at a protein-bound Mn4CaO5-cluster, the water-oxidizing complex (WOC). In the photosynthetic organisms, the light-driven formation of the WOC from dissolved metal ions is a key process because it is essential in both initial activation and continuous repair of PSII. Structural information is required for understanding of this chaperone-free metal-cluster assembly. For the first time, we obtained a structure of PSII from Thermosynechococcus elongatus without the Mn4CaO5-cluster...
July 18, 2017: ELife
https://www.readbyqxmd.com/read/28718616/photo-thermally-driven-refreshable-microactuators-based-on-graphene-oxide-doped-paraffin
#5
Sichao Hou, Miao Wang, Shouwu Guo, Ming Su
Actuators based on phase change materials (paraffin) can simultaneously produce large stroke length and large force due to thermal expansion, but the low thermal conductivity of paraffin requires high power input and long actuation time. The graphene oxide (GO) doped paraffin dynamic actuator addresses the key challenges in the design of thermal phase change actuators: Thermal conductivity and light absorbing is increased and the response time is reduced compared to the standard phase change actuator designed with metal heating resistors...
July 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28717789/editorial-eaed-photo-contest
#6
Alessandro Devigus
No abstract text is available yet for this article.
2017: International Journal of Esthetic Dentistry
https://www.readbyqxmd.com/read/28717562/development-of-thin-skin-mimicking-bilayer-solid-tissue-phantoms-for-optical-spectroscopic-studies
#7
K Bala Nivetha, N Sujatha
In vivo spectroscopic measurements have the proven potential to provide important insight about the changes in tissue during the development of malignancies and thus help to diagnose tissue pathologies. Extraction of intrinsic data in the presence of varying amounts of scatterers and absorbers offers great challenges in the development of such techniques to the clinical level. Fabrication of optical phantoms, tailored to the biochemical as well as morphological features of the target tissue, can help to generate a spectral database for a given optical spectral measurement system...
July 1, 2017: Biomedical Optics Express
https://www.readbyqxmd.com/read/28717543/outcome-analysis-of-transurethral-resection-versus-potassium-titanyl-phosphate-photo-selective-vaporization-of-the-prostate-for-the-treatment-of-benign-prostatic-hyperplasia-a-randomized-controlled-trial-with-4-years-follow-up
#8
Bimalesh Purkait, Rahul Janak Sinha, Krishna Swamy A Srinivas, Ankur Bansal, Ashok Kumar Sokhal, Vishwajeet Singh
OBJECTIVE: Photovaporization of prostate (PVP) is a newer surgical modality of benign prostatic hyperplasia (BPH) which is gaining importance recently. There are a few randomized controlled trials that showed safety and efficacy of PVP in comparison with transurethral resection of prostate (TURP) with limited follow-up period (<2 years). Here, we are presenting a comparative study performed on potassium titanyl phosphate (KTP) PVP laser versus TURP for the treatment of BPH with long-term follow-up period...
June 2017: Turkish Journal of Urology
https://www.readbyqxmd.com/read/28717162/ultra-low-threshold-polariton-lasing-at-room-temperature-in-a-gan-membrane-microcavity-with-a-zero-dimensional-trap
#9
R Jayaprakash, F G Kalaitzakis, G Christmann, K Tsagaraki, M Hocevar, B Gayral, E Monroy, N T Pelekanos
Polariton lasers are coherent light sources based on the condensation of exciton-polaritons in semiconductor microcavities, which occurs either in the kinetic or thermodynamic (Bose-Einstein) regime. Besides their fundamental interest, polariton lasers have the potential of extremely low operating thresholds. Here, we demonstrate ultra-low threshold polariton lasing at room temperature, using an all-dielectric, GaN membrane-based microcavity, with a spontaneously-formed zero-dimensional trap. The microcavity is fabricated using an innovative method, which involves photo-electrochemical etching of an InGaN sacrificial layer and allows for the incorporation of optimally-grown GaN active quantum wells inside a cavity with atomically-smooth surfaces...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28716738/photodynamic-therapy-and-pain-a-systematic-review
#10
Jennifer Maria Ang, Irbaz Bin Riaz, Muhammad Umar Kamal, Gyorgy Paragh, Nathalie C Zeitouni
Photodynamic therapy (PDT) is an effective treatment for actinic keratoses and early skin cancers, and the only office procedure to control field cancerization. Procedure-associated pain limits widespread PDT use and by early termination of treatment can decrease overall therapeutic efficacy. Here we review and assess reported interventions on PDT-associated pain, in order to identify the most promising methods to manage treatment-associated pain and identify focus for future studies. Literature search was performed using MEDLINE, EMBASE, and the Cochrane Library by two independent reviewers to select publications that assessed and compared pain quantitatively during PDT treatment for actinic keratoses, basal cell carcinomas, and/or in situ squamous cell carcinomas...
July 14, 2017: Photodiagnosis and Photodynamic Therapy
https://www.readbyqxmd.com/read/28716541/development-and-validation-of-an-accurate-gate-model-for-neuropet-scanner
#11
Peyman Sheikhzadeh, Hamid Sabet, Hossein Ghadiri, Parham Geramifar, Hojjat Mahani, Pardis Ghafarian, Mohammad Reza Ay
NeuroPET is a cylindrical full ring mobile PET/CT scanner for brain imaging that was developed by Photo Diagnostic Systems, Inc. The scanner has 7 modules, each with 3×4 detector blocks. The detectors have two layers of scintillator arrays with a half pixel pitch offset to realize two levels of depth of interaction. In this study, we evaluated the NeuroPET scanner modeled in the GATE simulation tool and analyzed the acquired data to better understand the contribution of inter-detector scattering (IDS). The results show that the average difference between simulated and measured data for a point-like source is 2...
July 14, 2017: Physica Medica: PM
https://www.readbyqxmd.com/read/28716355/study-of-relative-response-factors-and-mass-balance-in-forced-degradation-studies-with-liquid-chromatography-photo-diode-array-detector-evaporative-light-scattering-detector-mass-spectrometry-system
#12
Paula Hong, Aaron D Phoebe, Michael D Jones
A case study was performed using photodiode array detection (PDA) in combination with evaporative light scattering (ELS) detection and mass spectrometry (MS) to assess both mass balance and the relative response factors (RRFs) in the forced degradation studies of the drug substance, glimepiride. The RRF value, which is the ratio of the response factor of the impurity to that of the API, was first determined using calibration curves of standards. This conventional technique was compared to a second, multi-detection technique, which used the PDA and ELS detectors to determine both the ultraviolet (UV) peak area and the concentration (based on measurement by ELS) in a single analysis...
July 4, 2017: Journal of Chromatography. A
https://www.readbyqxmd.com/read/28715781/effects-of-blue-or-violet-light-on-the-inactivation-of-staphylococcus-aureus-by-riboflavin-5-phosphate-photolysis
#13
Tak-Wah Wong, Chien-Wei Cheng, Zong-Jhe Hsieh, Ji-Yuan Liang
The light sensitive compound riboflavin-5'-phosphate (or flavin mononucleotide, FMN) generates reactive oxygen species (ROS) upon photo-irradiation. FMN is required by all flavoproteins because it is a cofactor of biological blue-light receptors. The photochemical effects of FMN after irradiation by blue or violet light on the inactivation of Staphylococcus aureus strains, including a methicillin-resistant strain (MRSA), were investigated in this study. Upon blue- or violet-light photo-treatment, FMN was shown to inactivate S...
July 12, 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28715692/propping-the-optical-and-electronic-properties-of-potential-photo-sensitizers-with-different-%C3%AF-spacers-td-dft-insights
#14
Basant A Ali, Nageh K Allam
We report density functional theory (DFT) and time-dependent density functional theory (TD-DFT) calculations on the widely used N3 dye (cis-[Ru(2,2'-bipyridine-4,4'-dicarboxylic acid)2(NCS)2] and its trans isomer with different π-spacers. The study compared the sensitization properties of the two isomers in terms of their electronic properties such as light harvesting efficiency (LHE), absorbed wavelength (λMax) and molecular orbital distribution. Also, charge transfer descriptors, such as the charge transfer distance (D(CT)), dipole moment (μ(CT)), and the amount of charge transferred (q(CT)) were investigated...
July 12, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28715262/sexting-behaviors-exhibited-by-men-who-have-sex-with-men-between-the-ages-of-18-70-who-live-in-a-socially-conservative-state
#15
Joseph M Currin, Randolph D Hubach
Sexting, defined as the sending and receiving of sexually suggestive or sexually explicit text or photos, has been growing in prevalence. Recent studies have demonstrated that over half of individuals sampled over 17 and regardless of gender participate in some type of sexting behavior. Most studies on sexting behaviors, including those looking at men who have sex with men (MSM) focus on emerging adult or university-based populations. The goal of the current study was to sample a nonuniversity-based MSM adult population to determine the prevalence of sexting behavior and the odds that a person engages in sexting behaviors based on certain sexual behaviors...
July 2017: Cyberpsychology, Behavior and Social Networking
https://www.readbyqxmd.com/read/28714670/cross-linking-furan-modified-kisspeptin-10-to-the-kiss-receptor
#16
Willem Vannecke, Christophe Ampe, Marleen Van Troys, Massimiliano Beltramo, Annemieke Madder
Chemical cross-linking is well-established for investigating protein-protein interactions. Traditionally, photo cross-linking is used but is associated with problems of selectivity and UV toxicity in a biological context. We here describe, with live cells and under normal growth conditions, selective cross-linking of a furan-modified peptide ligand to its membrane-presented receptor with zero toxicity, high efficiency, and spatio-specificity. Furan-modified kisspeptin-10 is covalently coupled to its glycosylated membrane receptor, GPR54(KISS1R)...
July 17, 2017: ACS Chemical Biology
https://www.readbyqxmd.com/read/28714663/harnessing-hot-electrons-from-near-ir-light-for-hydrogen-production-using-pt-end-capped-aunrs
#17
Nathalia Ortiz, Brandon Zoellner, Soung Joung Hong, Yue Ji, Tao Wang, Yang Liu, Paul A Maggard, Gufeng Wang
Gold nanorods show great potential in harvesting natural sun light and generating hot charge carriers that can be employed to produce electrical or chemical energies. We show that photochemical reduction of Pt(IV) to Pt metal mainly takes place at the ends of gold nanorods (AuNRs), suggesting photon-induced hot electrons are localized in a time-averaged manner at AuNR ends. To use these hot electrons efficiently, a novel synthetic method to selectively overgrow Pt at the ends of AuNRs has been developed. These Pt-end-capped AuNRs show relatively high activity for the production of hydrogen gas using artificial white light, natural sun light, and more importantly, near IR light at 976 nm...
July 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28714341/identification-of-phenolic-compounds-from-the-leaf-part-of-teucrium-pseudo-scorodonia-desf-collected-from-algeria
#18
Karima Belarbi, Fawzia Atik-Bekkara, Imad Abdelhamid El Haci, Ilhem Bensaid, Chahrazed Bekhechi
In the present paper,we reported for the first time, the identification of the phenolic compounds in butanolic fraction obtained from the leaf part of Teucrium pseudo-Scorodonia Desf. collected from Algeria using RP-HPLC-PDA (Reversed Phase High Performance Liquid Chromatography/Photo Diode Array) technique. Several standards were used for this purpose. The analysis led to the identification of six phenolic acids (ferulic, sinapic, rosmarinic, syringique, caffeic, p-coumaric acids) and one flavonoid (rutin), the last one, has interesting pharmacological properties...
July 16, 2017: Natural Product Research
https://www.readbyqxmd.com/read/28713310/an-examination-of-the-four-part-theory-of-the-chinese-self-the-differentiation-and-relative-importance-of-the-different-types-of-social-oriented-self
#19
Chien-Ru Sun
Because culture has a deep and far-reaching influence, individuals who grew up within different cultures tend to develop different basic self-constructions. With respect to the Chinese under the influence of Chinese culture, Yang proposed the concepts of individual-oriented self and social-oriented self. He argued that, besides the individual-oriented self, the social-oriented self of the Chinese contains three types of self: the relationship-oriented self, the familistic (group)-oriented self, and the other-oriented self...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28713002/photo-stimulation-of-persistent-luminescence-nanoparticles-enhances-cancer-cells-death
#20
Gonzalo Ramírez-García, Minerva Martínez-Alfaro, Fanny d'Orlyé, Fethi Bedioui, Nathalie Mignet, Anne Varenne, Silvia Gutiérrez-Granados, Cyrille Richard
Persistent luminescence nanoparticles made of ZnGa1.995Cr0.005O4 (ZGO-NPs) are innovative nanomaterials that emit photons during long periods of time after the end of the excitation, allowing their use as diagnosis probes for in vivo optical imaging. During the excitation process, a part of the energy is stored in traps to further emit photons over long time. However, we observed in this study that some of the energy reduces molecular oxygen to produce reactive oxygen species (ROS). Following this observation, theoxidative stress induction and cytotoxic effects of these NPs were investigated on human breast cancer cells...
July 13, 2017: International Journal of Pharmaceutics
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