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https://www.readbyqxmd.com/read/29912555/discovery-and-evolution-of-polyoxopalladates
#1
Peng Yang, Ulrich Kortz
Noble metal catalysts, in particular palladium-containing materials, are of prime commercial interest, because of their role as oxidation catalysts in automobile emission-control systems and reforming catalysts for the production of high-octane gasoline. However, despite almost two centuries of research, the precise structure of such materials is still ill-defined on the sub-nanometer scale, which severely limits the understanding of the underlying catalytic mechanisms. As a burgeoning class of structurally well-defined noble metal oxide nanoclusters, polyoxopalladates (POPs) have been highly rated as ideal models to fully decipher the molecular mechanism of noble metal-based catalysis...
June 18, 2018: Accounts of Chemical Research
https://www.readbyqxmd.com/read/29910512/physical-networks-from-multifunctional-telechelic-star-polymers-a-rheological-study-by-experiments-and-simulations
#2
Vishal Metri, Ameur Louhichi, Jiajun Yan, Guilhem P Baeza, Krzysztof Matyjaszewski, Dimitris Vlassopoulos, Wim J Briels
The equilibrium mechanical properties of a cross-linked gel of telechelic star polymers are studied by rheology and Brownian dynamics simulations. The Brownian dynamics model consists of cores to which Rouse arms are attached. Forces between the cores are obtained from a potential of mean force model developed by Likos and co-workers. Both experimentally and in the simulations, networks were created by attaching sticker groups to the ends of the arms of the polymers, which were next allowed to form bonds among them in a one to one fashion...
April 24, 2018: Macromolecules
https://www.readbyqxmd.com/read/29909677/lone-star-retractor-and-elastic-band-compression-dressing-for-urethroplasty
#3
A Chetwood, J Aspinall
No abstract text is available yet for this article.
June 18, 2018: Annals of the Royal College of Surgeons of England
https://www.readbyqxmd.com/read/29908195/safety-of-next-day-discharge-following-lobectomy-have-we-broken-the-speed-limit
#4
Stephen Greer, Ashley D Miller, Jeremiah S Smith, Jenny M Holcombe, James R Headrick
BACKGROUND: Utilizing our standardized approach to air leak reduction (STAR) protocol has led to a continual decrease in the need for inpatient recovery following lobectomy. Although next day discharges do occur, the current literature hasn't addressed their safety. We analyzed our STAR dataset to study this group and their outcomes. METHODS: A retrospective review of prospectively collected data from the STAR dataset was performed. Characteristics were compared between patients discharged on postoperative day (POD) 1 and those with longer admissions...
June 13, 2018: Annals of Thoracic Surgery
https://www.readbyqxmd.com/read/29908009/amphiphilic-y-shaped-miktoarm-star-copolymer-for-anti-cancer-hydrophobic-and-hydrophilic-drugs-co-delivery-synthesis-characterization-in-vitro-and-in-vivo-biocompatibility-study
#5
Mozhgan Aghajanzadeh, Mostafa Zamani, Hamid Rashidzadeh, Kobra Rostamizadeh, Ali Sharafi, Hossein Danafar
In this project, a core-shell Polymersome based on miktoarm star-copolymer: methoxy Poly Ethylene Glycol-Lysine-(Poly Caprolactone)2 (PEG-Lys-PCL2 ) was synthesized by a new method as controlled targeted drug delivery systems for co-delivery of the chemotherapeutic methotrexate (MTX) and curcumin (CUR). Some properties of these nano carriers (NCs) such as surface morphology, structure, surface charge, stability and biocompatibility were evaluated by Proton nuclear magnetic resonance (1 HNMR), dynamic scanning colorimetry (DSC), Fourier-transform infrared spectroscopy (FT-IR), Dynamic light scattering (DLS), atomic force microscopy (AFM), Critical aggregation concentration (CAC), hemolysis test, MTT assay and lethal dose 50 (LD50)...
June 16, 2018: Journal of Biomedical Materials Research. Part A
https://www.readbyqxmd.com/read/29907785/inhibitory-effect-of-slit2-on-granulosa-cell-proliferation-mediated-by-the-cdc42-paks-erk1-2-mapk-pathway-in-the-prehierarchical-follicles-of-the-chicken-ovary
#6
Rifu Xu, Ning Qin, Xiaoxing Xu, Xue Sun, Xiaoxia Chen, Jinghua Zhao
The SLIT2 ligand and ROBO receptors of the SLIT/ROBO pathway are expressed in hen ovarian follicles and have been shown to play critical roles in ovary development, cell proliferation and apoptosis in mammals. However, the exact roles of SLIT2 and the molecular mechanisms of chicken follicle development remain poorly understood. Here, we discovered that high levels of SLIT2 suppress FSHR, GDF9, STAR and CYP11A1 mRNA and protein expression in granulosa cells (GCs) and cell proliferation (p < 0.01). However, these inhibitory effects can be abolished by the siRNA-mediated knockdown of the ROBO1 and ROBO2 receptors...
June 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29907772/investigation-of-return-photons-from-sodium-laser-beacon-excited-by-a-40-watt-facility-class-pulsed-laser-for-adaptive-optical-telescope-applications
#7
Qi Bian, Yong Bo, Junwei Zuo, Min Li, Ruoxi Dong, Keran Deng, Dingwen Zhang, Liping He, Qingshuang Zong, Dafu Cui, Qinjun Peng, Hongbin Chen, Zuyan Xu
The brightness of the artificial beacon is one critical performance parameter for adaptive optics. Here, a 40-watt level narrow-linewidth microsecond pulsed yellow laser is produced at 589 nm with a high repetition frequency of 600 Hz and a pulse duration of 120 μs. An experiment to project the pulse beam up to the sky and measure the fluorescence photon returns of the Na atoms has been held on the 1.8-meter telescope in Lijiang observatory. During the sky test, a laser guide star (LGS) spot is firstly observed with Rayleigh scattering elimination by means of a gateable pulse format...
June 15, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29907124/exon-skipping-for-duchenne-muscular-dystrophy-a-systematic-review-and-meta-analysis
#8
Yuko Shimizu-Motohashi, Terumi Murakami, En Kimura, Hirofumi Komaki, Norio Watanabe
BACKGROUND: Exon skipping has been considered a promising therapeutic approach for Duchenne muscular dystrophy (DMD). Eteplirsen received conditional approval in the United States in 2016. To date, no systematic reviews or meta-analyses of randomized controlled trials (RCTs) of exon skipping drugs have been published to determine the pooled estimates for the effect of exon skipping in treating DMD. METHODS: A systematic review and meta-analysis of double-blind RCTs comparing exon-skipping drugs with placebo in DMD was performed...
June 15, 2018: Orphanet Journal of Rare Diseases
https://www.readbyqxmd.com/read/29906154/convective-excitation-of-inertial-modes-in-binary-neutron-star-mergers
#9
Roberto De Pietri, Alessandra Feo, José A Font, Frank Löffler, Francesco Maione, Michele Pasquali, Nikolaos Stergioulas
We present the first very long-term simulations (extending up to ∼140  ms after merger) of binary neutron star mergers with piecewise polytropic equations of state and in full general relativity. Our simulations reveal that, at a time of 30-50 ms after merger, parts of the star become convectively unstable, which triggers the excitation of inertial modes. The excited inertial modes are sustained up to several tens of milliseconds and are potentially observable by the planned third-generation gravitational-wave detectors at frequencies of a few kilohertz...
June 1, 2018: Physical Review Letters
https://www.readbyqxmd.com/read/29905743/self-calibration-of-lensless-holographic-endoscope-using-programmable-guide-stars
#10
Robert Kuschmierz, Elias Scharf, Nektarios Koukourakis, Jürgen W Czarske
Coherent fiber bundle (CFB)-based endoscopes enable optical keyhole access in applications such as biophotonics. In conjunction with objective lenses, CFBs allow imaging of intensity patterns. In contrast, digital optical phase conjugation enables lensless holographic endoscopes for the generation of pixelation-free arbitrary light patterns. For real-world applications, however, this requires a non-invasive in situ calibration of the complex optical transfer function of the CFB with only single-sided access...
June 15, 2018: Optics Letters
https://www.readbyqxmd.com/read/29903953/dark-nights-bright-stars
#11
Jon Cohen
No abstract text is available yet for this article.
June 15, 2018: Science
https://www.readbyqxmd.com/read/29903886/a-dust-enshrouded-tidal-disruption-event-with-a-resolved-radio-jet-in-a-galaxy-merger
#12
S Mattila, M Pérez-Torres, A Efstathiou, P Mimica, M Fraser, E Kankare, A Alberdi, M Á Aloy, T Heikkilä, P G Jonker, P Lundqvist, I Martí-Vidal, W P S Meikle, C Romero-Cañizales, S J Smartt, S Tsygankov, E Varenius, A Alonso-Herrero, M Bondi, C Fransson, R Herrero-Illana, T Kangas, R Kotak, N Ramírez-Olivencia, P Väisänen, R J Beswick, D L Clements, R Greimel, J Harmanen, J Kotilainen, K Nandra, T Reynolds, S Ryder, N A Walton, K Wiik, G Östlin
Tidal disruption events (TDEs) are transient flares produced when a star is ripped apart by the gravitational field of a supermassive black hole (SMBH). We have observed a transient source in the western nucleus of the merging galaxy pair Arp 299 that radiated >1.5 × 1052 erg in the infrared and radio but was not luminous at optical or x-ray wavelengths. We interpret this as a TDE with much of its emission reradiated at infrared wavelengths by dust. Efficient reprocessing by dense gas and dust may explain the difference between theoretical predictions and observed luminosities of TDEs...
June 14, 2018: Science
https://www.readbyqxmd.com/read/29902490/decreased-h3k9ac-level-of-star-mediated-testicular-dysplasia-induced-by-prenatal-dexamethasone-exposure-in-male-offspring-rats
#13
Min Liu, Biao Chen, Linguo Pei, Qi Zhang, Yunfei Zou, Hao Xiao, Jin Zhou, Liaobin Chen, Hui Wang
Prenatal dexamethasone exposure (PDE) could induce testicular developmental toxicity in adults. The present study aims to confirm its intrauterine origination, and to explore its potential intrauterine programming mechanism. The pregnant rats were respectively injected subcutaneously with 0.2 and 0.8 mg/kg⋅d dexamethasone during gestational days (GD) 9 to 20. The testes and serum of offspring rats were collected on GD20 and postnatal week (PW) 12. In vivo, PDE significantly induced the abnormal testicular morphology in offspring from GD20 to PW12...
June 11, 2018: Toxicology
https://www.readbyqxmd.com/read/29902469/acceptance-of-tele-rehabilitation-by-stroke-patients-perceived-barriers-and-facilitators
#14
Shilpa Tyagi, Daniel Sy Lim, Wilbert Hh Ho, Yun Qing Koh, Vincent Cai, Gerald Ch Koh, Helena Legido-Quigley
OBJECTIVE: To explore the perceived barriers and facilitators of tele-rehabilitation by stroke patients, caregivers and rehabilitation therapists in an Asian setting. DESIGN: Qualitative study involving semi-structured in-depth interviews and focus group discussions. SETTING: General community PARTICIPANTS: 37 participants including stroke patients, their caregivers and tele-therapists selected by purposive sampling. INTERVENTIONS: STARS trial...
June 11, 2018: Archives of Physical Medicine and Rehabilitation
https://www.readbyqxmd.com/read/29901449/label-free-process-monitoring-of-3d-bioprinted-engineered-constructs-via-dielectric-impedance-spectroscopy
#15
Lokesh Karthik Narayanan, Trevor L Thompson, Rohan A Shirwaiker, Binil Starly
Biofabrication processes can affect biological quality attributes of encapsulated cells within constructs. Currently, assessment of the fabricated constructs is performed offline by subjecting the constructs to destructive assays that require staining and sectioning. This drawback limits the translation of biofabrication processes to industrial practice. In this work, we investigate the dielectric response of viable cells encapsulated in bioprinted 3D hydrogel constructs to an applied alternating electric field as a label-free non-destructive monitoring approach...
June 14, 2018: Biofabrication
https://www.readbyqxmd.com/read/29901265/adipose-tissue-is-a-potential-source-of-hyperandrogenism-in-obese-female-rats
#16
Isabel Viola Wagner, Lena Sahlin, Iuliia Savchuk, Nora Klöting, Konstantin Svechnikov, Olle Söder
OBJECTIVE: Obesity in females is often associated with metabolic complications and hyperandrogenism, but the sources of androgens are not completely understood. Therefore, this study investigated whether adipose tissue could be a source of androgens promoting hyperandrogenism development in obese female rats. METHODS: Gene expression of steroidogenic enzymes and testosterone levels were determined in periovarian and inguinal adipose tissue and in the supernatant of cultured preadipocytes and adipocytes...
June 14, 2018: Obesity
https://www.readbyqxmd.com/read/29897488/glycostore-a-database-of-retention-properties-for-glycan-analysis
#17
Sophie Zhao, Ian Walsh, Jodie L Abrahams, Louise Royle, Terry Nguyen-Khuong, Daniel Spencer, Daryl L Fernandes, Nicolle H Packer, Pauline M Rudd, Matthew P Campbell
Summary: GlycoStore is a curated chromatographic, electrophoretic and mass-spectrometry composition database of N-, O-, glycosphingolipid (GSL) glycans and free oligosaccharides associated with a range of glycoproteins, glycolipids and biotherapeutics. The database is built on publicly available experimental data sets from GlycoBase developed in the Oxford Glycobiology Institute and then the National Institute for Bioprocessing Research and Training (NIBRT). It has now been extended to include recently published and in-house data collections from the Bioprocessing Technology Institute (BTI) A*STAR, Macquarie University and Ludger Ltd...
April 20, 2018: Bioinformatics
https://www.readbyqxmd.com/read/29897463/maldi-tof-for-the-rapid-detection-of-carbapenemase-producing-enterobacteriaceae-comparison-of-the-commercialized-mbt-star%C3%A2-carba-ivd-kit-with-two-in-house-maldi-tof-techniques-and-the-rapidec%C3%A2-carba-np
#18
Laurent Dortet, Didier Tandé, Dominique de Briel, Sandrine Bernabeu, Camille Lasserre, Guillaume Gregorowicz, Agnès B Jousset, Thierry Naas
Objectives: There is an urgent need for accurate and fast diagnostic tests to identify carbapenemase-producing bacteria. Here, we have evaluated three MALDI-TOF-based techniques to detect carbapenemase-producing Enterobacteriaceae (CPE) from cultured colonies. Methods: The performance of three MALDI-TOF-based techniques, including the commercialized MBT STAR®-Carba IVD Kit (Bruker Daltonics) and two in-house protocols performed on the Microflex LT Biotyper (Bruker Daltonics) and the VITEK® MS Plus (bioMérieux), were compared with those of the RAPIDEC® CARBA NP (bioMérieux)...
June 11, 2018: Journal of Antimicrobial Chemotherapy
https://www.readbyqxmd.com/read/29897079/chiroptical-and-magnetic-properties-of-star-shaped-fe-complexes-from-chiral-schiff-bases-structural-and-magnetic-correlations-based-on-continuous-shape-measures
#19
Julia Mayans, Mercè Font-Bardia, Albert Escuer
New chiral FeIII4 star-shaped complexes have been synthesized starting from enantiomerically pure Schiff bases and chiroptically and magnetically characterized. The structural and magnetic properties of the complete family of 40 Fe4 complexes reported in the literature have been analyzed in the search for synthetic and magnetostructural correlations.
June 13, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29896154/basis-and-design-of-a-randomized-clinical-trial-to-evaluate-the-effect-of-levosulpiride-on-retinal-alterations-in-patients-with-diabetic-retinopathy-and-diabetic-macular-edema
#20
Ma Ludivina Robles-Osorio, Renata García-Franco, Carlos D Núñez-Amaro, Ximena Mira-Lorenzo, Paulina Ramírez-Neria, Wendy Hernández, Ellery López-Star, Thomas Bertsch, Gonzalo Martínez de la Escalera, Jakob Triebel, Carmen Clapp
Background: Diabetic retinopathy (DR) and diabetic macular edema (DME) are potentially blinding, microvascular retinal diseases in people with diabetes mellitus. Preclinical studies support a protective role of the hormone prolactin (PRL) due to its ocular incorporation and conversion to vasoinhibins, a family of PRL fragments that inhibit ischemia-induced retinal angiogenesis and diabetes-derived retinal vasopermeability. Here, we describe the protocol of an ongoing clinical trial investigating a new therapy for DR and DME based on elevating the circulating levels of PRL with the prokinetic, dopamine D2 receptor blocker, levosulpiride...
2018: Frontiers in Endocrinology
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