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https://www.readbyqxmd.com/read/28643514/nitroalkenes-as-latent-1-2-biselectrophiles-a-multicatalytic-approach-for-the-synthesis-of-1-4-diketones-and-their-application-in-a-4-step-one-pot-reaction-to-polysubstituted-pyrroles
#1
Patrick J W Fuchs, Kirsten Zeitler
A NHC-catalyzed Nitro-Stetter/elimination/Stetter reaction sequence employs nitroalkenes as latent 1,2-dication synthons providing a novel access to highly useful symmetrical and unsymmetrical 2-aryl substituted 1,4 diketone building blocks from commercially available aldehyde precursors. For less activated (aliphatic) aldehydes a cooperative catalytic strategy has been developed via the merger of NHC and H-bonding catalysis. To further showcase the versatility of our approach a great variety of these unprecedented 1,4 diketones are used to efficiently synthesize polysubstituted pyrroles - including those with hetaryl substituents - in good to excellent yields in a multicatalytic metal-free, 4-step one-pot-cascade reaction under mild, yet robust conditions...
June 23, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28642482/moving-bragg-grating-solitons-in-a-semilinear-dual-core-system-with-dispersive-reflectivity
#2
S A M Saddam Chowdhury, Javid Atai
The existence, stability and collision dynamics of moving Bragg grating solitons in a semilinear dual-core system where one core has the Kerr nonlinearity and is equipped with a Bragg grating with dispersive reflectivity, and the other core is linear are investigated. It is found that moving soliton solutions exist as a continuous family of solutions in the upper and lower gaps of the system's linear spectrum. The stability of the moving solitons are investigated by means of systematic numerical stability analysis, and the effect and interplay of various parameters on soliton stability are analyzed...
June 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28640271/a-massive-dead-disk-galaxy-in-the-early-universe
#3
Sune Toft, Johannes Zabl, Johan Richard, Anna Gallazzi, Stefano Zibetti, Moire Prescott, Claudio Grillo, Allison W S Man, Nicholas Y Lee, Carlos Gómez-Guijarro, Mikkel Stockmann, Georgios Magdis, Charles L Steinhardt
At redshift z = 2, when the Universe was just three billion years old, half of the most massive galaxies were extremely compact and had already exhausted their fuel for star formation. It is believed that they were formed in intense nuclear starbursts and that they ultimately grew into the most massive local elliptical galaxies seen today, through mergers with minor companions, but validating this picture requires higher-resolution observations of their centres than is currently possible. Magnification from gravitational lensing offers an opportunity to resolve the inner regions of galaxies...
June 21, 2017: Nature
https://www.readbyqxmd.com/read/28618810/enhancement-effects-of-clear-speech-and-word-initial-position-in-korean-glides
#4
Seung-Eun Chang
The current study investigated the enhancement effect in Korean speakers' clear speech and word-initial position, using acoustic analyses of the Korean glides /w/ and /j/. The results showed that the transitions of glides /w/ and /j/ at onset were enhanced in clear speech with an expanded vowel space. An expanded vowel space was also observed in the word-initial position, but the expansion was not statistically significant. However, the significant interaction between speaking style and word position revealed that the articulatory and global modifications in clear speech were noticeably greater at onset in the word-medial compared to the word-initial position...
June 2017: Journal of the Acoustical Society of America
https://www.readbyqxmd.com/read/28611871/efficient-extraction-of-oil-from-droplet-microfluidic-emulsions
#5
J R Haliburton, S C Kim, I C Clark, R A Sperling, D A Weitz, A R Abate
Droplet microfluidic techniques can perform large numbers of single molecule and cell reactions but often require controlled, periodic flow to merge, split, and sort droplets. Here, we describe a simple method to convert aperiodic flows into periodic ones. Using an oil extraction module, we efficiently remove oil from emulsions to readjust the droplet volume fraction, velocity, and packing, producing periodic flows. The extractor acts as a universal adaptor to connect microfluidic modules that do not operate under identical flow conditions, such as droplet generators, incubators, and merger devices...
May 2017: Biomicrofluidics
https://www.readbyqxmd.com/read/28590253/when-lithography-meets-self-assembly-a-review-of-recent-advances-in-the-directed-assembly-of-complex-metal-nanostructures-on-planar-and-textured-surfaces
#6
Robert Hughes, Eredzhep Menumerov, Svetlana Neretina
One of the foremost challenges in nanofabrication is the establishment of a processing science that integrates wafer-based materials, techniques, and devices with the extraordinary physicochemical properties accessible when materials are reduced to nanoscale dimensions. Such a merger would allow for exacting controls on nanostructure positioning, promote cooperative phenomenon between adjacent nanostructures and/or substrate materials, and allow for electrical contact to individual or groups of nanostructures...
June 7, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28588945/what-the-inbev-merger-means-for-health-in-africa
#7
EDITORIAL
Johanna Hanefeld, Benjamin Hawkins, Cecile Knai, Karen Hofman, Mark Petticrew
No abstract text is available yet for this article.
August 2016: BMJ Global Health
https://www.readbyqxmd.com/read/28586565/pov-the-effect-of-hospital-mergers-on-healthcare
#8
R Bruce Crelin
No abstract text is available yet for this article.
2017: MD Advisor: a Journal for New Jersey Medical Community
https://www.readbyqxmd.com/read/28579916/kilonovae
#9
REVIEW
Brian D Metzger
The mergers of double neutron star (NS-NS) and black hole (BH)-NS binaries are promising gravitational wave (GW) sources for Advanced LIGO and future GW detectors. The neutron-rich ejecta from such merger events undergoes rapid neutron capture (r-process) nucleosynthesis, enriching our Galaxy with rare heavy elements like gold and platinum. The radioactive decay of these unstable nuclei also powers a rapidly evolving, supernova-like transient known as a "kilonova" (also known as "macronova"). Kilonovae are an approximately isotropic electromagnetic counterpart to the GW signal, which also provides a unique and direct probe of an important, if not dominant, r-process site...
2017: Living Reviews in Relativity
https://www.readbyqxmd.com/read/28578569/thermally-stable-metallic-nanoparticles-prepared-via-core-cross-linked-block-copolymer-micellar-nanoreactors
#10
Guoqiang Zhang, Saide Tang, Aixiang Li, Lei Zhu
Thermally stable metallic nanoparticles (MNPs) are highly desirable for the melt processing of polymer nanocomposites. However, due to the high surface energy penalty and decreased melting temperature, MNPs are easy to agglomerate and lose their unique properties if there is no protection or confinement layer. In this work, we report a facile and efficient way to synthesize thermally stable MNPs using core-cross-linked polystyrene-b-poly(4-vinylpyridine) (PS-b-P4VP) reverse micelles as nanoreactors. From infrared results, gold, silver, and palladium ions exhibited distinctive coordination to the 4VP groups with varying chelation strengths...
June 14, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28577263/modelling-for-the-proposed-roll-out-of-the-111-service-in-wales-a-case-study
#11
Mark Tuson, Tracey England, Doris Behrens, Richard Bowen, Dorothy Edwards, John Frankish, Jude Kay
NHS Direct Wales provides a single point of access where members of the public can telephone and seek medical support and/or advice. The service is provided for all the Health Boards in Wales by a single virtual call centre run from a main location in Swansea with 2 satellite locations. Patients in Wales can also access a local General Practitioner service during the evenings and at weekends, by phoning their Out of Hours service. The introduction of a '111' service is intended to combine these two operations on a pan-Wales basis using the existing NHS Direct Wales call centre and staff, with the existing Health Board Out of Hours 'hubs'...
June 2, 2017: Health Care Management Science
https://www.readbyqxmd.com/read/28574890/normative-and-cataclysmic-career-transitions-a-nurse-s-memoir
#12
Gloria F Donnelly
Drawn from 54 years of experience as a nursing professional, this author gives a personal account of 2 types of career transitions: (1) normative transitions/stages, which include position changes, educational pursuits, and promotion; and (2) cataclysmic transitions, such as dismissal, bankruptcy, and mergers, that arise out of disruptive work situations that dramatically influence one's beliefs, actions, and perspective over time and ultimately shape a career. The importance of influencers throughout a career and lessons learned along the way are also explored...
July 2017: Nursing Administration Quarterly
https://www.readbyqxmd.com/read/28573587/boxes-of-model-building-and-visualization
#13
Dušan Turk
Macromolecular crystallography and electron microscopy (single-particle and in situ tomography) are merging into a single approach used by the two coalescing scientific communities. The merger is a consequence of technical developments that enabled determination of atomic structures of macromolecules by electron microscopy. Technological progress in experimental methods of macromolecular structure determination, computer hardware, and software changed and continues to change the nature of model building and visualization of molecular structures...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28544874/the-relative-safety-of-paternal-maternal-and-traditional-foster-care-placements
#14
Jesse J Helton, Brian B Boutwell, Michael DiBernardo
When children are placed into foster care the caseworker must give preference to an adult relative, many of whom are grandparents, over an unrelated caregiver. This kinship preference is based in evolutionary biology, which suggests that the imperative to care for a child should be greater for kin versus non-kin. However, not all kin are related to a child in the same way, and level of paternity uncertainty may influence level of care provided. For instance, maternal grandparents can be assured that they share genetic material with their grandchild, while paternal grandparents may not have the same level of certainty...
May 22, 2017: Child Abuse & Neglect
https://www.readbyqxmd.com/read/28530148/an-industry-update-what-is-new-in-the-field-of-therapeutic-delivery-this-month
#15
Elaine Harris
The present industry update covers the period 1-28 February 2017. Information was sourced primarily from company press releases, regulatory and patent agencies, scientific literature and various news websites. A report issued this month indicated that the recent American election has influenced the rate and volume of pharma acquisitions and mergers (A&M) in the final quarter of 2016 and it remains to be seen what (if any) is the effect on the therapeutic drug delivery sector in the longer term. There was positive approval news this month for Valeant, Intellipharmaceutics and Pfizer for products that offered novel therapeutic delivery...
June 2017: Therapeutic Delivery
https://www.readbyqxmd.com/read/28524673/detecting-gravitational-wave-memory-without-parent-signals
#16
Lucy O McNeill, Eric Thrane, Paul D Lasky
Gravitational-wave memory manifests as a permanent distortion of an idealized gravitational-wave detector and arises generically from energetic astrophysical events. For example, binary black hole mergers are expected to emit memory bursts a little more than an order of magnitude smaller in strain than the oscillatory parent waves. We introduce the concept of "orphan memory": gravitational-wave memory for which there is no detectable parent signal. In particular, high-frequency gravitational-wave bursts (≳kHz) produce orphan memory in the LIGO/Virgo band...
May 5, 2017: Physical Review Letters
https://www.readbyqxmd.com/read/28505544/real-life-experience-of-patients-starting-insulin-degludec-a-multicenter-analysis-of-1064-subjects-from-the-german-austrian-dpv-registry
#17
Barbara Bohn, Artur Zimmermann, Christian Wagner, Sigrun Merger, Desirée Dunstheimer, Florian Kopp, Katja Gollisch, Volker Zindel, Reinhard W Holl
BACKGROUND: The long-acting insulin analogue degludec is a therapeutic option for patients with type 1 (T1D) or type 2 diabetes (T2D). Aim of this analysis was to investigate differences in clinical characteristics of patients before and after initiating degludec use in a cohort of German/Austrian patients. METHODS: 1064 subjects with T1D/T2D and documented degludec use from the Diabetes-Patient-Follow-Up (DPV) registry were included. The follow-up cohort (n=421) comprised patients with available data before and 3-15months after switching to degludec...
July 2017: Diabetes Research and Clinical Practice
https://www.readbyqxmd.com/read/28493481/hospital-and-health-insurance-markets-concentration-and-inpatient-hospital-transaction-prices-in-the-u-s-health-care-market
#18
Seidu Dauda
OBJECTIVE: To examine the effects of hospital and insurer markets concentration on transaction prices for inpatient hospital services. DATA SOURCES: Measures of hospital and insurer markets concentration derived from American Hospital Association and HealthLeaders-InterStudy data are linked to 2005-2008 inpatient administrative data from Truven Health MarketScan Databases. STUDY DESIGN: Uses a reduced-form price equation, controlling for cost and demand shifters and accounting for possible endogeneity of market concentration using instrumental variables (IV) technique...
May 11, 2017: Health Services Research
https://www.readbyqxmd.com/read/28482766/size-does-matter-span-of-control-in-hospitals
#19
Christina Holm-Petersen, Sussanne Østergaard, Per Bo Noergaard Andersen
Purpose Centralization, mergers and cost reductions have generally led to increasing levels of span of control (SOC), and thus potentially to lower leadership capacity. The purpose of this paper is to explore how a large SOC impacts hospital staff and their leaders. Design/methodology/approach The study is based on a qualitative explorative case study of three large inpatient wards. Findings The study finds that the nursing staff and their frontline leaders experience challenges in regard to visibility and role of the leader, e...
April 10, 2017: Journal of Health Organization and Management
https://www.readbyqxmd.com/read/28474911/black-hole-spectroscopy-with-coherent-mode-stacking
#20
Huan Yang, Kent Yagi, Jonathan Blackman, Luis Lehner, Vasileios Paschalidis, Frans Pretorius, Nicolás Yunes
The measurement of multiple ringdown modes in gravitational waves from binary black hole mergers will allow for testing the fundamental properties of black holes in general relativity and to constrain modified theories of gravity. To enhance the ability of Advanced LIGO/Virgo to perform such tasks, we propose a coherent mode stacking method to search for a chosen target mode within a collection of multiple merger events. We first rescale each signal so that the target mode in each of them has the same frequency and then sum the waveforms constructively...
April 21, 2017: Physical Review Letters
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