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https://www.readbyqxmd.com/read/29786915/reversible-oxidative-addition-reductive-elimination-of-si-h-bond-to-base-stabilized-silylenes-a-theoretical-insight
#1
Tsuyoshi Kato, Masayuku Nakagaki, Antoine Baceiredo, Shigeyoshi Sakaki
Although oxidative addition (O.A.) and reductive elimination (R.E.) are exceedingly important processes in organometallic chemistry, such processes are still extremely rare for main group element species. Here we report a theoretical study on the reaction of phosphine-stabilized silylenes with silanes which proceeds via reversible O.A./R.E. at room temperature. Of particular interest, this theoretical approach highlights the important role of the ligand, which can greatly affect kinetics and energy balance of the reaction...
May 22, 2018: Chemistry: a European Journal
https://www.readbyqxmd.com/read/29786676/-the-modern-approaches-to-the-restoration-of-postural-balance-in-the-patients-suffering-from-the-consequences-of-an-acute-cerebrovascular-accident-cva
#2
S A Volovets, E Y Sergeenko, L Y Darinskaya, B A Polyaev, Y A Yashinina, M A Isaeva, I V Zhitareva, A N Lobov, T I Panova
BACKGROUND: the most frequent and severe consequences of an acute cerebrovascular accident (CVA) are locomotor and coordination disorders which significantly increase the risk of falling in a static position and when walking. The methods used for the rehabilitation of the affected patients are designed in the first place to enable the patients to acquire the skills necessary for maintaining the static balance. The modern equipment allows to carry out coordination training in the static position and also during walking...
May 21, 2018: Voprosy Kurortologii, Fizioterapii, i Lechebnoĭ Fizicheskoĭ Kultury
https://www.readbyqxmd.com/read/29786189/-renal-infarction-multicentric-cases-in-piedmont
#3
Daria Motta, Andrea Airoldi, Serena Bainotti, Manuel Burdese, Andrea Campo, Luigia Costantini, Raffaella Cravero, Paola Mesiano, Giorgina B Piccoli, Olga Randone, Andrea Serra, Patrizia Vio, Roberto Boero
We describe factors associated to renal infarction, clinical, instrumental and laboratoristic features, and therapeutic strategies too. This is an observational, review and polycentric study of cases in Nephrologic Units in Piedmont during 2013-2015, with diagnosis of renal infarction by Computed Tomography Angiography (CTA). We collected 48 cases (25 M, age 57±16i; 23 F age 70±18, p = 0.007), subdivided in 3 groups based on etiology: group 1: cardio-embolic (n=19) ; group 2: coagulation abnormalities (n= 9); group 3: other causes or idiopathic (n=20)...
May 2018: Giornale Italiano di Nefrologia: Organo Ufficiale Della Società Italiana di Nefrologia
https://www.readbyqxmd.com/read/29786151/time-dependent-loss-of-trabecular-bone-in-human-tibial-plateau-fractures
#4
Lucian Bogdan Solomon, David Kitchen, Paul Hamill Anderson, Dongqing Yang, Yolandi Starczak, Masakazu Kogawa, Egon Perilli, Peter Jonathan Smitham, Mark Sean Rickman, Dominic Thewlis, Gerald James Atkins
We investigated if time between injury and surgery affects cancellous bone properties in patients suffering tibial plateau fractures (TPF), in terms of structural integrity and gene expression controlling bone loss. A cohort of 29 TPF, operated 1-17 days post-injury, had biopsies from the fracture and an equivalent contralateral limb site, at surgery. Samples were assessed using micro-computed tomography and real-time RT-PCR analysis for the expression of genes known to be involved in bone remodeling and fracture healing...
May 22, 2018: Journal of Orthopaedic Research: Official Publication of the Orthopaedic Research Society
https://www.readbyqxmd.com/read/29785721/heeding-humanity-in-an-age-of-electronic-health-records-heidegger-levinas-and-healthcare
#5
Casey Rentmeester
The American Recovery and Reinvestment Act of 2009 (ARRA) required healthcare providers in the United States to adopt and demonstrate meaningful use of electronic health records (EHRs) by January 1, 2014. In many ways, EHRs mark a notable improvement over paper medical records as they are more easily accessible and allow for electronic searching and sharing of medical history. However, as EHRs have become mandated by ARRA, many nurses now rely upon computers far more heavily during nurse-patient interactions, thereby decreasing the level of direct interpersonal communication between the two...
May 21, 2018: Nursing Philosophy: An International Journal for Healthcare Professionals
https://www.readbyqxmd.com/read/29785679/drooling-in-parkinson-s-disease-evidence-of-a-role-for-divided-attention
#6
Hannah Reynolds, Nick Miller, Richard Walker
Drooling is a frequently reported symptom in Parkinson's Disease (PD) with significant psychosocial impact and negative health consequences including silent aspiration of saliva with the associated risk of respiratory infections. It is suggested that in PD drooling is associated with inefficient oropharyngeal swallowing which reduces the effective clearance of saliva rather than hyper-salivation. This is compounded by unintended mouth opening and flexed posture increasing anterior loss of saliva. It is reported to occur most frequently during cognitively distracting concurrent tasks suggesting an impact from divided attention in a dual-task situation...
May 21, 2018: Dysphagia
https://www.readbyqxmd.com/read/29784591/accuracy-and-outcome-of-rapid-ultrasound-in-shock-and-hypotension-rush-in-egyptian-polytrauma-patients
#7
Adel Hamed Elbaih, Ahmed Mohamed Housseini, Mohamed E M Khalifa
PURPOSE: "Polytrauma" patients are of a higher risk of complications and death than the summation of expected mortality and morbidity of their individual injuries. The ideal goal in trauma resuscitation care is to identify and treat all injuries. With clinical and technological advanced imaging available for diagnosis and treatment of traumatic patients, point of care-rapid ultrasound in shock and hypotension (RUSH) significantly affects modern trauma services and patient outcomes...
March 26, 2018: Chinese Journal of Traumatology, Zhonghua Chuang Shang za Zhi
https://www.readbyqxmd.com/read/29784028/rblosum-performs-better-than-corblosum-with-lesser-error-per-query
#8
Renganayaki Govindarajan, Biji Christopher Leela, Achuthsankar S Nair
OBJECTIVE: BLOSUM matrices serve as standard matrices for many protein sequence alignment programs. BLOSUM matrices have been constructed using BLOCKS version5.0 with 27,102 BLOCKS, whereas the latest updated version14.3 has 6,739,916 BLOCKS. We read with interest the research article by Hess et al. (BMC Bioinform 17:189, 2016) on CorBLOSUM, wherein it is argued that an inaccuracy in the BLOSUM code affects the cluster memberships of sequences. They show that replacing the integer based clustering threshold to floating point arguably improves the performances of CorBLOSUM over BLOSUM and RBLOSUM matrices...
May 21, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29784006/secure-corridor-for-infraacetabular-screws-in-acetabular-fracture-fixation-a-3-d-radiomorphometric-analysis-of-124-pelvic-ct-datasets
#9
Stephan Arlt, Hansrudi Noser, Andreas Wienke, Florian Radetzki, Gunther Olaf Hofmann, Thomas Mendel
BACKGROUND: Acetabular fracture surgery is directed toward anatomical reduction and stable fixation to allow for the early functional rehabilitation of an injured hip joint. Recent biomechanical investigations have shown the superiority of using an additional screw in the infraacetabular (IA) region, thereby transfixing the separated columns to strengthen the construct by closing the periacetabular fixation frame. However, the inter-individual existence and variance concerning secure IA screw corridors are poorly understood...
May 21, 2018: Journal of Orthopaedic Surgery and Research
https://www.readbyqxmd.com/read/29783976/possible-multiple-system-atrophy-with-predominant-parkinsonism-in-a-patient-with-chronic-schizophrenia-a-case-report
#10
Hiroshi Komatsu, Masaaki Kato, Teiko Kinpara, Takashi Ono, Yoshihisa Kakuto
BACKGROUND: Multiple system atrophy (MSA) is an adult-onset, rare, and progressive neurodegenerative disorder characterized by a varying combination of autonomic failure, cerebellar ataxia, and parkinsonism. MSA is categorized as MSA-P with predominant parkinsonism, and as MSA-C with predominant cerebellar features. The prevalence of MSA has been reported to be between 1.86 and 4.9 cases per 100,000 individuals. In contrast, approximately 1% of the population is affected by schizophrenia during their lifetime; therefore, MSA-P comorbidity is very rare in schizophrenic patients...
May 21, 2018: BMC Psychiatry
https://www.readbyqxmd.com/read/29783926/neural-networks-for-link-prediction-in-realistic-biomedical-graphs-a-multi-dimensional-evaluation-of-graph-embedding-based-approaches
#11
Gamal Crichton, Yufan Guo, Sampo Pyysalo, Anna Korhonen
BACKGROUND: Link prediction in biomedical graphs has several important applications including predicting Drug-Target Interactions (DTI), Protein-Protein Interaction (PPI) prediction and Literature-Based Discovery (LBD). It can be done using a classifier to output the probability of link formation between nodes. Recently several works have used neural networks to create node representations which allow rich inputs to neural classifiers. Preliminary works were done on this and report promising results...
May 21, 2018: BMC Bioinformatics
https://www.readbyqxmd.com/read/29782801/epr-evidence-of-liquid-water-in-ice-an-intrinsic-property-of-water-or-a-self-confinement-effect
#12
Muthulakshmi Thangswamy, Priya Maheshwari, Dhanadeep Dutta, Vinayak G Rane, Pradeep Kumar Pujari
Liquid water (LW) existence in pure ice below 273 K has been a controversial aspect primarily because of the lack of experimental evidences. Recently, electron paramagnetic resonance (EPR) has been used to study deeply supercooled water in a rapidly-frozen polycrystalline ice. The same technique can also be used to probe the presence of LW in polycrystalline ice that has formed through a more conventional, slow cooling one. In this context, the present study aims to emphasize that in case of an external probe involving techniques such as EPR, the results are influenced by the binary phase (BP) diagram of the probe-water system, which also predicts the existence of LW domains in ice, upto the eutectic point...
May 21, 2018: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/29782582/surfaces-from-the-visual-past-recovering-high-resolution-terrain-data-from-historic-aerial-imagery-for-multitemporal-landscape-analysis
#13
Christopher Sevara, Geert Verhoeven, Michael Doneus, Erich Draganits
Historic aerial images are invaluable sources of aid to archaeological research. Often collected with large-format photogrammetric quality cameras, these images are potential archives of multidimensional data that can be used to recover information about historic landscapes that have been lost to modern development. However, a lack of camera information for many historic images coupled with physical degradation of their media has often made it difficult to compute geometrically rigorous 3D content from such imagery...
2018: Journal of archaeological method and theory
https://www.readbyqxmd.com/read/29781451/comparisons-of-the-computed-tomographic-scan-and-panoramic-radiography-before-mandibular-third-molar-extraction-surgery
#14
Qian Luo, Wanglun Diao, Lan Luo, Yong Zhang
BACKGROUND Mandibular third molar extraction surgery has a postoperative complication of hypoesthesia of the lower lip and/or chin. The objective of the study was to determine if preoperative radiographic examination by panoramic radiography and computed tomography (CT) scan can predict postoperative complications of mandibular third molar extraction surgery. MATERIAL AND METHODS In total, 479 patients who had mandibular third molar extraction surgery were included in this cross-sectional study. Patients had panoramic radiographies and CT scans to determine the relationship of the tooth, the canal, and the buccolingual position...
May 21, 2018: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29781166/evaluation-of-the-rostral-projection-of-the-sacral-lamina-as-a-component-of-degenerative-lumbosacral-stenosis-in-german-shepherd-dogs
#15
Harvey Saunders, Andrew J Worth, Janis P Bridges, Angela Hartman
OBJECTIVE: To determine the association between a greater rostral projection of the sacral lamina and clinical signs of cauda equina syndrome (CES) in German shepherd dogs (GSD) with presumptive degenerative lumbosacral disease (DLSS). STUDY DESIGN: Retrospective cohort study. SAMPLE POPULATION: One hundred forty-three GSD (125 police dogs and 18 pet dogs) presenting for either CES or prebreeding evaluation. Fifty-five were classified as affected by CES and diagnosed with DLSS, and 88 were classified as unaffected on the basis of clinical and imaging findings...
May 20, 2018: Veterinary Surgery: VS
https://www.readbyqxmd.com/read/29780849/incidental-findings-on-coronary-computed-tomography-angiography-in-human-immunodeficiency-virus-hiv-positive-and-hiv-negative-persons
#16
Sara Reinschmidt, Teja Turk, Philip E Tarr, Roger Kouyos, Christoph Hauser, Patrick Schmid, Rainer Weber, Philipp Kaufmann, Ronny R Buechel, Helen Kovari
Background: Incidental findings on coronary computed tomography angiography (CCTA) have a great impact on the benefits and costs of testing for cardiovascular disease. The number of incidental findings might be increased in human immunodeficiency virus (HIV)-positive individuals compared with the general population. Data are limited regarding the association between incidental findings and HIV infection. Methods: We assessed the prevalence and factors associated with incidental findings among HIV-positive and HIV-negative participants ≥45 years undergoing CCTA...
May 2018: Open Forum Infectious Diseases
https://www.readbyqxmd.com/read/29780624/diagnostic-performance-of-fluorine-18-fluorodeoxyglucose-positron-emission-tomography-in-the-management-of-solitary-pulmonary-nodule-a-meta-analysis
#17
Duilio Divisi, Mirko Barone, Luca Bertolaccini, Gino Zaccagna, Francesca Gabriele, Roberto Crisci
Background: In the setting of solitary pulmonary nodules (SPNs), fluorine-18 fluorodeoxyglucose positron emission tomography/computed tomography (18 F-FDG-PET/CT) is considered a useful non-invasive diagnostic tool though false positive (FP) and false negative (FN) results affects accuracy due to different conditions, such as inflammatory diseases or low-uptake neoplasms. Aim of this study is to evaluate overall diagnostic performance of 18 F-FDG-PET/CT for malignant pulmonary nodules...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29780044/-effect-of-misregistration-between-spect-and-ct-images-on-attenuation-correction-for-quantitative-bone-spect-imaging
#18
Mika Sakoshi, Norikazu Matsutomo, Tomoaki Yamamoto, Eisuke Sato
PURPOSE: The aim of this study was to evaluate the effect of misregistration between single-photon emission computed tomography (SPECT) and computed tomography (CT) images on bone SPECT. METHODS: We acquired SPECT and CT images of a body phantom filled with bone-equivalent solution and 99m Tc for evaluation of bone SPECT. SPECT images were reconstructed using attenuation correction maps obtained by shifting the attenuation coefficients from non-shifted values (reference)...
2018: Nihon Hoshasen Gijutsu Gakkai Zasshi
https://www.readbyqxmd.com/read/29779857/factors-affecting-the-incidence-of-contrast-induced-nephropathy-in-patients-undergoing-computed-tomography
#19
M Heras Benito, M Garrido Blázquez, Y Gómez Sanz, M Bernardez Mardomingo, J Ruiz Cacho, F J Rodríguez Recio, M J Fernández-Reyes Luis
OBJECTIVE: To analyze the incidence of contrast-induced nephropathy in a cohort of patients undergoing computed tomography (CT) with intravenous iodinated contrast material. To evaluate the efficacy of N-acetylcysteine in preventing contrast-induced nephropathy. PATIENTS AND METHODS: This prospective observational study was carried out in the months comprising March 2016 through July 2016. We selected the first five patients scheduled to undergo CT examination each day who agreed to participate and signed the informed consent form...
May 17, 2018: Radiología
https://www.readbyqxmd.com/read/29779177/computational-identification-of-structural-factors-affecting-the-mutagenic-potential-of-aromatic-amines-study-design-and-experimental-validation
#20
Svetoslav H Slavov, Iva Stoyanova-Slavova, William Mattes, Richard D Beger, Beat J Brüschweiler
A grid-based, alignment-independent 3D-SDAR (three-dimensional spectral data-activity relationship) approach based on simulated 13 C and 15 N NMR chemical shifts augmented with through-space interatomic distances was used to model the mutagenicity of 554 primary and 419 secondary aromatic amines. A robust modeling strategy supported by extensive validation including randomized training/hold-out test set pairs, validation sets, "blind" external test sets as well as experimental validation was applied to avoid over-parameterization and build Organization for Economic Cooperation and Development (OECD 2004) compliant models...
May 19, 2018: Archives of Toxicology
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