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https://www.readbyqxmd.com/read/28345917/enantiodivergent-synthesis-of-tertiary-%C3%AE-aryl-1-indanones-evidence-toward-disparate-mechanisms-in-the-palladium-catalyzed-decarboxylative-asymmetric-protonation
#1
Cian Kingston, Patrick J Guiry
Herein, we describe a study into the scope and origin of an enantiodivergent effect in the palladium-catalyzed decarboxylative asymmetric protonation. By switching the achiral proton source, both enantiomers of a series of tertiary α-aryl-1-indanones are readily accessed from the corresponding α-aryl-β-keto allyl esters. In this example of dual stereocontrol, enantioselectivities up to 94% (S) and 92% (R) were achieved using Meldrum's acid and formic acid, respectively. In an attempt to rationalize this switch in absolute configuration an investigation of the ambiguous mechanism of the decarboxylative asymmetric protonation was conducted...
March 27, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28345688/a-vacuum-ultraviolet-laser-pulsed-field-ionization-photoion-study-of-methane-ch4-determination-of-the-appearance-energy-of-methylium-from-methane-with-unprecedented-precision-and-the-resulting-impact-on-the-bond-dissociation-energies-of-ch4-and-ch4
#2
Yih-Chung Chang, Bo Xiong, David H Bross, Branko Ruscic, C Y Ng
We report on the successful implementation of a high-resolution vacuum ultraviolet (VUV) laser pulsed field ionization-photoion (PFI-PI) detection method for the study of unimolecular dissociation of quantum-state- or energy-selected molecular ions. As a test case, we have determined the 0 K appearance energy (AE0) for the formation of methylium, CH3(+), from methane, CH4, as AE0(CH3(+)/CH4) = 14.32271 ± 0.00013 eV. This value has a significantly smaller error limit, but is otherwise consistent with previous laboratory and/or synchrotron-based studies of this dissociative photoionization onset...
March 27, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28345567/retina-and-the-tubercle-bacillus-four-decades-of-our-journey-and-current-understanding
#3
Pradeep Venkatesh
Tuberculosis continues to be a major pandemic with enormous public health implication. Involvement of ocular tissues in the form of tubercles, tuberculomas, panophthalmitis, and iris granulomas are well recognized as definitive manifestations of tuberculosis. For these lesions, confirmatory evidence is available in the form of demonstration of acid-fast Bacillus on Ziehl-Neelsen staining. For other retinochoroidal disorders such as central serous chorioretinopathy, retinal vasculitis, and presumed ocular tuberculosis, hard evidence about the role of Mycobacterium tuberculosis is lacking...
February 2017: Indian Journal of Ophthalmology
https://www.readbyqxmd.com/read/28345246/effect-of-history-and-context-on-forensic-pathologist-interpretation-of-photographs-of-patterned-injury-of-the-skin
#4
William R Oliver
In a previous study, a survey-based analysis of pathologist diagnoses of patterned injury was performed. Subjects were provided with photographs of "classic" injuries and asked to diagnose the lesion in the absence of history or context. There was a relatively low diagnostic consensus among respondents. A second survey suggested that the disparate answers were not due to a strong belief in different diagnoses, but instead reflected how the respondents dealt with ambiguity. A third survey was created that asked participants to evaluate patterned injuries of the skin, but provided history and contextual information...
March 26, 2017: Journal of Forensic Sciences
https://www.readbyqxmd.com/read/28344843/the-impact-of-job-stress-and-job-satisfaction-on-workforce-productivity-in-an-iranian-petrochemical-industry
#5
Naser Hoboubi, Alireza Choobineh, Fatemeh Kamari Ghanavati, Sareh Keshavarzi, Ali Akbar Hosseini
BACKGROUND: Job stress and job satisfaction are important factors affecting workforce productivity. This study was carried out to investigate the job stress, job satisfaction, and workforce productivity levels, to examine the effects of job stress and job satisfaction on workforce productivity, and to identify factors associated with productivity decrement among employees of an Iranian petrochemical industry. METHODS: In this study, 125 randomly selected employees of an Iranian petrochemical company participated...
March 2017: Safety and Health At Work
https://www.readbyqxmd.com/read/28344573/submarine-basaltic-glass-colonization-by-the-heterotrophic-fe-ii-oxidizing-and-siderophore-producing-deep-sea-bacterium-pseudomonas-stutzeri-vs-10-the-potential-role-of-basalt-in-enhancing-growth
#6
Lisa A Sudek, Greg Wanger, Alexis S Templeton, Hubert Staudigel, Bradley M Tebo
Phylogenetically and metabolically diverse bacterial communities have been found in association with submarine basaltic glass surfaces. The driving forces behind basalt colonization are for the most part unknown. It remains ambiguous if basalt provides ecological advantages beyond representing a substrate for surface colonization, such as supplying nutrients and/or energy. Pseudomonas stutzeri VS-10, a metabolically versatile bacterium isolated from Vailulu'u Seamount, was used as a model organism to investigate the physiological responses observed when biofilms are established on basaltic glasses...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28343729/the-ambiguities-of-performance-based-governance-reforms-in-italy-reviving-the-fortunes-of-evaluation-and-performance-measurement
#7
Mita Marra
Over the past two decades, Italy's administrative reforms have institutionalized evaluation to improve program effectiveness, staff productivity, and results-driven accountability against waste and corruption. Across ministries, regional governments, universities, schools and environmental protection agencies, seemingly unexpected consequences have emerged out of the implementation of performance measurement and evaluation regimes within public organizations. Formal compliance to legally binding evaluation procedures, judicially-sanctioned managerial accountability and lack of cross-agency coordination coupled with long-standing cultural separations among evaluators are some of the ambiguities associated with a performance-based governance system within Italian public administration...
February 6, 2017: Evaluation and Program Planning
https://www.readbyqxmd.com/read/28343028/epidemiology-of-penetrating-injuries-in-the-united-kingdom-a-systematic-review
#8
REVIEW
G Whittaker, J Norton, J Densley, D Bew
INTRODUCTION: Penetrating injuries account for a significant number of deaths in the United Kingdom (UK) annually. Numerous articles have examined the epidemiology of penetrating trauma in various areas of the UK. This article aimed to systematically review the current literature and evaluate the incidence and mortality of penetrating injury according to region in the UK. METHODS: A systematic literature search was performed using MEDLINE(®) (1946 to June 2016), EMBASE(®) (1974 to June 2016), and PsycINFO(®) (1806 to June 2016) databases...
March 22, 2017: International Journal of Surgery
https://www.readbyqxmd.com/read/28342105/real-time-surgical-tool-tracking-and-pose-estimation-using-a-hybrid-cylindrical-marker
#9
Lin Zhang, Menglong Ye, Po-Ling Chan, Guang-Zhong Yang
PURPOSE: To provide an integrated visualisation of intraoperative ultrasound and endoscopic images to facilitate intraoperative guidance, real-time tracking of the ultrasound probe is required. State-of-the-art methods are suitable for planar targets while most of the laparoscopic ultrasound probes are cylindrical objects. A tracking framework for cylindrical objects with a large work space will improve the usability of the intraoperative ultrasound guidance. METHODS: A hybrid marker design that combines circular dots and chessboard vertices is proposed for facilitating tracking cylindrical tools...
March 24, 2017: International Journal of Computer Assisted Radiology and Surgery
https://www.readbyqxmd.com/read/28342054/tube-task-hand-preference-in-captive-hylobatids
#10
Luca Morino, Makiko Uchikoshi, Fred Bercovitch, William D Hopkins, Tetsuro Matsuzawa
The link between laterality in humans and other primates is still hotly debated. Hylobatids have been rather neglected in this research area, yet they can provide important insights because: (1) they share with humans a complex vocal repertoire, which in humans is thought to be associated with brain hemispheric specialization and lateralized behaviors; (2) their adaptation to arboreality has produced unique postural constraints; (3) the little that is known about laterality in gibbons is contradictory (captive studies have provided conflicting results, while a field study on siamangs reported a population-level left-hand preference)...
March 24, 2017: Primates; Journal of Primatology
https://www.readbyqxmd.com/read/28341827/neural-basis-of-negativity-bias-in-the-perception-of-ambiguous-facial-expression
#11
Takehito Ito, Keita Yokokawa, Noriaki Yahata, Ayako Isato, Tetsuya Suhara, Makiko Yamada
Negativity bias, which describes the tendency to interpret ambiguous stimuli or events as negative, is often observed in patients with depression and may prevent psychological well-being. Here, we used ambiguous facial stimuli, with negative (sad) and positive (happy) emotions simultaneously accessible, to examine neural activation during perceptual decision-making in healthy participants. The negativity bias was positively correlated with the activity of the bilateral pregenual anterior cingulate cortex (pgACC) when ambiguous faces were perceived as sad versus happy...
March 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28341066/recommendations-for-cerebrospinal-fluid-alzheimer-s-disease-biomarkers-in-the-diagnostic-evaluation-of-mild-cognitive-impairment
#12
Sanna-Kaisa Herukka, Anja Hviid Simonsen, Niels Andreasen, Ines Baldeiras, Maria Bjerke, Kaj Blennow, Sebastiaan Engelborghs, Giovanni B Frisoni, Tomasz Gabryelewicz, Samantha Galluzzi, Ron Handels, Milica G Kramberger, Agnieszka Kulczyńska, Jose Luis Molinuevo, Barbara Mroczko, Agneta Nordberg, Catarina Resende Oliveira, Markus Otto, Juha O Rinne, Uroš Rot, Esen Saka, Hilkka Soininen, Hanne Struyfs, Silvia Suardi, Pieter Jelle Visser, Bengt Winblad, Henrik Zetterberg, Gunhild Waldemar
This article presents recommendations, based on the Grading of Recommendations, Assessment, Development, and Evaluation method, for the clinical application of cerebrospinal fluid (CSF) amyloid-β1-42, tau, and phosphorylated tau in the diagnostic evaluation of patients with mild cognitive impairment (MCI). The recommendations were developed by a multidisciplinary working group and based on the available evidence and consensus from focused group discussions for 1) prediction of clinical progression to Alzheimer's disease (AD) dementia, 2) cost-effectiveness, 3) interpretation of results, and 4) patient counseling...
March 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28341065/recommendations-for-csf-ad-biomarkers-in-the-diagnostic-evaluation%C3%A2-of-dementia
#13
Anja Hviid Simonsen, Sanna-Kaisa Herukka, Niels Andreasen, Ines Baldeiras, Maria Bjerke, Kaj Blennow, Sebastiaan Engelborghs, Giovanni B Frisoni, Tomasz Gabryelewicz, Samantha Galluzzi, Ron Handels, Milica G Kramberger, Agnieszka Kulczyńska, Jose Luis Molinuevo, Barbara Mroczko, Agneta Nordberg, Catarina Resende Oliveira, Markus Otto, Juha O Rinne, Uroš Rot, Esen Saka, Hilkka Soininen, Hanne Struyfs, Silvia Suardi, Pieter Jelle Visser, Bengt Winblad, Henrik Zetterberg, Gunhild Waldemar
This article presents recommendations, based on the Grading of Recommendations, Assessment, Development, and Evaluation method, for the clinical application of cerebrospinal fluid (CSF) amyloid-β1-42, tau, and phosphorylated tau in the diagnostic evaluation of patients with dementia. The recommendations were developed by a multidisciplinary working group based on the available evidence and consensus from focused discussions for (i) identification of Alzheimer's disease (AD) as the cause of dementia, (ii) prediction of rate of decline, (iii) cost-effectiveness, and (iv) interpretation of results...
March 2017: Alzheimer's & Dementia: the Journal of the Alzheimer's Association
https://www.readbyqxmd.com/read/28340318/is-there-a-relationship-between-postural-alignment-and-mobility-for-adults-after-acquired-brain-injury-a-systematic-review
#14
Simon J Mills, Michelle N McDonnell, Dominic Thewlis, Shylie Mackintosh
PRIMARY OBJECTIVE: To examine the relationship between postural alignment and mobility skills for adults after acquired brain injury (ABI). METHODS: Systematic review of the literature. Seven electronic databases, grey literature and reference lists of the shortlisted publications were searched. Studies were included if participants were adults with ABI, both postural alignment and mobility were measured and analysis included a relationship between alignment and mobility...
March 24, 2017: Brain Injury: [BI]
https://www.readbyqxmd.com/read/28339684/embedding-nursing-interventions-into-the-world-health-organization-s-international-classification-of-health-interventions-ichi
#15
Nicola Fortune, Nicholas R Hardiker, Gillian Strudwick
Objective: : The International Classification of Health Interventions, currently being developed, seeks to span all sectors of the health system. Our objective was to test the draft classification's coverage of interventions commonly delivered by nurses, and propose changes to improve the utility and reliability of the classification for aggregating and analyzing data on nursing interventions. Materials and methods: : A 2-phase content mapping method was used: (1) three coders independently applied the classification to a dataset comprising 100 high-frequency nursing interventions; (2) the coders reached consensus for each intervention and identified reasons for initial discrepancies...
February 11, 2017: Journal of the American Medical Informatics Association: JAMIA
https://www.readbyqxmd.com/read/28338204/nsd2-promotes-osteosarcoma-cell-proliferation-and-metastasis-by-inhibiting-e-cadherin-expression
#16
M-H Lu, M-F Fan, X-D Yu
OBJECTIVE: Osteosarcoma is one of the most common malignant bone tumors. The mechanisms of osteosarcoma development and invasion have been studied for periods of time, yet targeted therapy for improving survival has not been well established. Histone lysine methyltransferase NSD2 was frequently overexpressed in multiple types of cancer such as multiple myeloma, stomach and colon cancer, and the overexpression of it usually associated with aggressiveness tumor type. However, the expression status and function of NSD2 are still ambiguous in osteosarcoma...
March 2017: European Review for Medical and Pharmacological Sciences
https://www.readbyqxmd.com/read/28337925/the-impact-of-a-highly-publicized-celebrity-suicide-on-suicide-related-online-information-seeking
#17
Florian Arendt, Sebastian Scherr
BACKGROUND: Research has already acknowledged the importance of the Internet in suicide prevention as search engines such as Google are increasingly used in seeking both helpful and harmful suicide-related information. AIMS: We aimed to assess the impact of a highly publicized suicide by a Hollywood actor on suicide-related online information seeking. METHOD: We tested the impact of the highly publicized suicide of Robin Williams on volumes of suicide-related search queries...
March 24, 2017: Crisis
https://www.readbyqxmd.com/read/28337675/an-ontology-based-search-engine-for-digital-reconstructions-of-neuronal-morphology
#18
Sridevi Polavaram, Giorgio A Ascoli
Neuronal morphology is extremely diverse across and within animal species, developmental stages, brain regions, and cell types. This diversity is functionally important because neuronal structure strongly affects synaptic integration, spiking dynamics, and network connectivity. Digital reconstructions of axonal and dendritic arbors are thus essential to quantify and model information processing in the nervous system. NeuroMorpho.Org is an established repository containing tens of thousands of digitally reconstructed neurons shared by several hundred laboratories worldwide...
March 23, 2017: Brain Informatics
https://www.readbyqxmd.com/read/28335460/neuropsychology-of-aesthetic-judgment-of-ambiguous-and-non-ambiguous-artworks
#19
Maddalena Boccia, Sonia Barbetti, Laura Piccardi, Cecilia Guariglia, Anna Maria Giannini
Several affective and cognitive processes have been found to be pivotal in affecting aesthetic experience of artworks and both neuropsychological as well as psychiatric symptoms have been found to affect artistic production. However, there is a paucity of studies directly investigating effects of brain lesions on aesthetic judgment. Here, we assessed the effects of unilateral brain damage on aesthetic judgment of artworks showing part/whole ambiguity. We asked 19 unilaterally brain-damaged patients (10 left and 9 right brain damaged patients, respectively LBDP and RBDP) and 20 age- and education-matched healthy individuals (controls, C) to rate 10 Arcimboldo's ambiguous portraits (AP), 10 realistic Renaissance portraits (RP), 10 still life paintings (SL), and 10 Arcimboldo's modified portraits where only objects/parts are detectable (AO)...
March 18, 2017: Behavioral Sciences
https://www.readbyqxmd.com/read/28334591/crossing-the-communication-chasm-challenges-and-opportunities-in-transitions-of-care-from-the-hospital-to-the-primary-care-clinic
#20
Nicholas A Rattray, Jason J Sico, LeeAnn M Cox, Alissa L Russ, Marianne S Matthias, Richard M Frankel
BACKGROUND: Transitions of care from specialty and acute settings to primary care abound. Compared to the continuity in end-of-shift handoffs, care transitions involve provider communication between practices and facilities with their own cultures and bureaucracies. Using the transition from acute care to outpatient primary care for stroke/transient ischemic attack (TIA) patients as a case study, this qualitative research explored communication practices and institutional arrangements among clinical providers responsible for longitudinal management of hypertension...
March 2017: Joint Commission Journal on Quality and Patient Safety
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