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https://www.readbyqxmd.com/read/28090768/tunneling-control-competition-between-6pi-electrocyclization-and-1-5-h-sigmatropic-shift-reactions-in-tetrahydro-1h-cyclobuta-e-indene-derivatives
#1
Sharmistha Karmakar, Ayan Datta
Direct dynamics calculation using canonical variational transtition state theory (CVT) inclusive of small curvature tunneling (SCT) reveals the influential role of quantum mechanical tunneling (QMT) for 2,2a,5,7b-tetrahydro-1H-cyclobuta[e]indene derivatives (2a-2j) in governing their product selectivity. 2a-2j follow two distinct reaction channels namely 6pi-electrocyclization (2-->3) and [1, 5]H-sigmatropic shift (2-->4) amongst which the activation barrier is higher for [1, 5]H-shift (2-->4) thereby favoring the kinetically controlled product (3a-3j) as anticipated...
January 16, 2017: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/28087519/sympathetic-modulation-of-electrical-activation-in-normal-and-infarcted-myocardium-implications-for-arrhythmogenesis
#2
Olujimi A Ajijola, Robert L Lux, Anadjeet Khahera, OhJin Kwon, Eric Aliotta, Daniel Ennis, Michael C Fishbein, Jeffrey Laurence Ardell, Kalyanam Shivkumar
: Background The influence of cardiac sympathetic innervation on electrical activation in normal and chronically infarcted ventricular myocardium is not understood. Methods and Results Yorkshire pigs with normal hearts (NL, n=12) or anterior myocardial infarction (MI, n=9) underwent high-resolution mapping of the anteroapical left ventricle, at baseline, and during left and right stellate ganglion stimulation (LSGS & RSGS, respectively). Conduction velocity (CV), activation times (AT), & directionality of propagation were measured...
January 13, 2017: American Journal of Physiology. Heart and Circulatory Physiology
https://www.readbyqxmd.com/read/28077284/structural-biology-of-the-cvt-pathway
#3
REVIEW
Akinori Yamasaki, Nobuo N Noda
Macroautophagy is a degradation process in which autophagosomes are generated to isolate and transport various materials, including damaged organelles and protein aggregates, as cargos to the lysosomes or vacuoles. Bulk autophagy is one of the two types of macroautophagy, which is triggered by starvation and targets non-specific cargos. The second type, i.e., selective autophagy, identifies and preferentially degrades specific cargos via receptor recognition. Cytoplasm-to-vacuole targeting (Cvt) is a selective autophagy pathway that specifically transports vacuolar hydrolases into the vacuole in budding yeast cells and has been extensively studied as a model of selective autophagy...
January 7, 2017: Journal of Molecular Biology
https://www.readbyqxmd.com/read/28076305/analytical-and-diagnostic-performance-of-two-automated-fecal-calprotectin-immunoassays-for-detection-of-inflammatory-bowel-disease
#4
Maxime M W De Sloovere, Dieter De Smet, Filip J Baert, Johan Debrabandere, Hilde J M Vanpoucke
BACKGROUND: We evaluated the (pre-)analytical and diagnostic performance of two automated fecal calprotectin (FC) immunoassays, Liaison® Calprotectin (Diasorin) on Liaison® XL and fCAL™ turbo (Bühlmann laboratories AG) on Cobas C501 (Roche Diagnostics), and compared it with our established Bühlmann ELISA method. METHODS: Our study comprised 229 consecutive patients with clinical suspicion of inflammatory bowel disease (IBD). RESULTS: All assay related stool extraction procedures showed excellent correlation with the established method, but the new stool extraction devices tend to give higher results as compared with stool weight methods...
January 11, 2017: Clinical Chemistry and Laboratory Medicine: CCLM
https://www.readbyqxmd.com/read/28067586/sociotechnical-perspective-on-implementing-clinical-video-telehealth-for-veterans-with-spinal-cord-injuries-and-disorders
#5
Rachael N Martinez, Timothy P Hogan, Salva Balbale, Keshonna Lones, Barry Goldstein, Christine Woo, Bridget M Smith
BACKGROUND: Real-time videoconferencing technology such as clinical video telehealth (CVT) offers a means to reach patient populations who face limited access to healthcare. The Veterans Health Administration has invested in CVT to improve care access for U.S. military veterans with spinal cord injuries and disorders (SCI/D); however, no studies have assessed the factors that influence implementation of this technology in clinical practice for individuals with SCI/D. INTRODUCTION: Guided by a sociotechnical perspective, the purpose of this study was to identify factors that influence implementation of CVT for veterans with SCI/D...
January 9, 2017: Telemedicine Journal and E-health: the Official Journal of the American Telemedicine Association
https://www.readbyqxmd.com/read/28067283/theoretical-insight-into-oh-and-cl-initiated-oxidation-of-cf3och-cf3-2-and-cf3ocf2cf2h-fate-of-cf3oc-x%C3%A2-cf3-2-and-cf3ocf2cf2x%C3%A2-radicals-x-o-o2
#6
Feng-Yang Bai, Yuan Ma, Shuang Lv, Xiu-Mei Pan, Xiu-Juan Jia
In this study, the mechanistic and kinetic analysis for reactions of CF3OCH(CF3)2 and CF3OCF2CF2H with OH radicals and Cl atoms have been performed at the CCSD(T)//B3LYP/6-311++G(d,p) level. Kinetic isotope effects for reactions CF3OCH(CF3)2/CF3OCD(CF3)2 and CF3OCF2CF2H/CF3OCF2CF2D with OH and Cl were estimated so as to provide the theoretical estimation for future laboratory investigation. All rate constants, computed by canonical variational transition state theory (CVT) with the small-curvature tunneling correction (SCT), are in reasonable agreement with the limited experimental data...
January 9, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28038774/cerebral-venous-thrombosis-at-high-altitude-a-systematic-review
#7
REVIEW
C Zavanone, M Panebianco, M Yger, A Borden, D Restivo, C Angelini, A Pavone, G Grimod, C Rosso, S Dupont
BACKGROUND AND OBJECTIVE: High altitude may be a factor associated with cerebral venous thrombosis (CVT). As our knowledge of CVT at high altitude is limited, it was decided to pool such information from the available case studies to determine whether high altitude can predispose to CVT. METHODS: A systematic review of the literature was performed for cases reporting CVT at high altitude. Searches of the PubMed database (up to July 2016) were performed for publications, using 'cerebral venous thrombosis' and 'high altitude' as keywords...
December 27, 2016: Revue Neurologique
https://www.readbyqxmd.com/read/28026954/kinetics-and-mechanistic-investigations-of-atmospheric-oxidation-of-hfo-1345fz-by-oh-radical-insights-from-theory
#8
Pradeep Kumar Rao, Shridhar P Gejji
HFO-1345fz (CF3CF2CH═CH2 or 3,3,4,4,4-pentafluoro-1-butene) belongs to a class of hydrofluoro-olefins and represents a new generation of potential foam expansion agents. Its atmospheric impact and environmental acceptability can be estimated from the studies of kinetics and mechanism of its oxidative degradation. The molecular insights accompanying the reaction pathways in terms of the characterization of intermediates or products and radiative properties should prove useful for large-scale industrial applications...
January 12, 2017: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/27998095/controlled-synthesis-of-two-dimensional-1t-tise2-with-charge-density-wave-transition-by-chemical-vapor-transport
#9
Jingyi Wang, Husong Zheng, Guanchen Xu, Lifei Sun, Dake Hu, Zhixing Lu, Lina Liu, Jingying Zheng, Chenggang Tao, Liying Jiao
Two-dimensional (2D) metallic transition metal dichalcogenides (TMDCs), such as 1T-TiSe2, are ideal systems for exploring the fundamentals in condensed matter physics. However, controlled synthesis of these ultrathin materials has not been achieved. Here, we explored the synthesis of charge density wave (CDW)-bearing 2D TiSe2 with chemical vapor transport (CVT) by extending this bulk crystal growth approach to the surface growth of TiSe2 by introducing suitable growth substrates and dramatically slowing down the growth rate...
December 21, 2016: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/27987606/surveillance-anticoagulation-or-filter-in-calf-vein-thrombosis
#10
Dustin Y Yoon, Ahsun Riaz, Katherine Teter, Ashley K Vavra, Melina R Kibbe, William H Pearce, Mark K Eskandari, Robert Lewandowski, Heron E Rodriguez
OBJECTIVE: This study compared the efficacy and complication rates of inferior vena cava (IVC) filters for calf vein thrombosis (CVT) vs conservative treatment with or without anticoagulation. METHODS: Vascular laboratory studies of patients who had an isolated CVT (anterior and posterior tibialis, peroneal, soleal, and gastrocnemius veins) from April 2009 to January 2014 were retrospectively analyzed from a single institution. Of 647 patients with isolated CVT, 285 (44%) received an IVC filter, and 362 (56%) received medical treatment alone (38...
January 2017: Journal of Vascular Surgery. Venous and Lymphatic Disorders
https://www.readbyqxmd.com/read/27980127/venous-thrombotic-recurrence-after-cerebral-venous-thrombosis-a-long-term-follow-up-study
#11
Paola Palazzo, Pierre Agius, Pierre Ingrand, Jonathan Ciron, Matthias Lamy, Aline Berthomet, Paul Cantagrel, Jean-Philippe Neau
BACKGROUND AND PURPOSE: After cerebral venous thrombosis (CVT), the risk of venous thrombotic events was estimated at 2% to 3% for a new CVT and 3% to 8% for extracranial events. However, because of the paucity of prospective studies, the clinical course of CVT is still largely unknown. We aimed to prospectively evaluate the rate of thrombosis recurrence in a cohort of CVT patients with a long-term follow-up and to detect predisposing factors for recurrence. METHODS: Consecutive CVT patients with complete clinical, radiological, biological, and genetic data were systematically followed up...
December 15, 2016: Stroke; a Journal of Cerebral Circulation
https://www.readbyqxmd.com/read/27904562/hyperhomocysteinemia-low-vitamin-b12-and-low-folic-acid-are-risk-factors-of-cerebral-vascular-thrombosis-in-northwest-iran
#12
Ali Akbar Taheraghdam, Nooriyeh Dalirakbari, Mohammad Khalili, Madjid Soltani, Saeid Sadeghieh Ahari
BACKGROUND: Cerebral vascular thrombosis (CVT) is the thrombosis of intracranial and sinuses. The aim of this is to estimate of risk of low folic acid, low vitamin B12, and hyperhomocysteinemia (hyper-Hcys) for CVT. MATERIALS AND METHODS: A total of 24 patients with CVT and 36 healthy controls participated in a cross-sectional case-control study. The deficient levels of folic acid and vitamin B12 defined as <10(th) percentile of folic acid and vitamin B12 level and hyper-Hcys was defined as >90(th) percentile of homocysteine of control group...
2016: Journal of Research in Medical Sciences: the Official Journal of Isfahan University of Medical Sciences
https://www.readbyqxmd.com/read/27886813/cranial-vault-thickness-in-non-human-primates-allometric-and-geometric-analyses-of-the-vault-and-its-component-layers
#13
Lynn E Copes
Extremely thick cranial vaults have been noted as a diagnostic characteristic of Homo erectus since the first fossil of the species was identified, but relatively little work has been done on elucidating its variation within extant non-human primates. Cranial vault thickness (CVT) is not a monolithic trait, and the relationship of its layers to other morphological variables is unknown. Total CVT and the thickness of the cortical and diploë layers individually, as well as the ratio between diploë and total thickness, were calculated from 258 female individuals from 47 species of non-human primate...
December 2016: Journal of Human Evolution
https://www.readbyqxmd.com/read/27881526/towards-the-genetic-basis-of-cerebral-venous-thrombosis-the-beast-consortium-a-study-protocol
#14
Ioana Cotlarciuc, Thomas Marjot, Muhammad S Khan, Sini Hiltunen, Elena Haapaniemi, Tiina M Metso, Jukka Putaala, Susanna M Zuurbier, Matthijs C Brouwer, Serena M Passamonti, Paolo Bucciarelli, Emanuela Pappalardo, Tasmin Patel, Paolo Costa, Marina Colombi, Patrícia Canhão, Aleksander Tkach, Rosa Santacroce, Maurizio Margaglione, Giovanni Favuzzi, Elvira Grandone, Donatella Colaizzo, Kostas Spengos, Antonio Arauz, Amanda Hodge, Reina Ditta, Stephanie Debette, Marialuisa Zedde, Guillaume Pare, José M Ferro, Vincent Thijs, Alessandro Pezzini, Jennifer J Majersik, Ida Martinelli, Jonathan M Coutinho, Turgut Tatlisumak, Pankaj Sharma
INTRODUCTION: Cerebral venous thrombosis (CVT) is a rare cerebrovascular condition accounting for <1% of all stroke cases and mainly affects young adults. Its genetic aetiology is not clearly elucidated. METHODS AND ANALYSIS: To better understand the genetic basis of CVT, we have established an international biobank of CVT cases, Biorepository to Establish the Aetiology of Sinovenous Thrombosis (BEAST) which aims to recruit highly phenotyped cases initially of European descent and later from other populations...
November 22, 2016: BMJ Open
https://www.readbyqxmd.com/read/27881438/ole1-fatty-acid-desaturase-is-required-for-atg9-delivery-and-isolation-membrane-expansion-during-autophagy-in-saccharomyces-cerevisiae
#15
Yuta Ogasawara, Shintaro Kira, Yukio Mukai, Takeshi Noda, Akitsugu Yamamoto
Macroautophagy, a major degradation pathway of cytoplasmic components, is carried out through formation of a double-membrane structure, the autophagosome. Although the involvement of specific lipid species in the formation process remains largely obscure, we recently showed that mono-unsaturated fatty acids (MUFA) generated by stearoyl-CoA desaturase 1 (SCD1) are required for autophagosome formation in mammalian cells. To obtain further insight into the role of MUFA in autophagy, in this study we analyzed the autophagic phenotypes of the yeast mutant of OLE1, an orthologue of SCD1...
January 15, 2017: Biology Open
https://www.readbyqxmd.com/read/27847760/clinical-aspects-of-cerebral-venous-thrombosis-experiences-in-two-institutions
#16
Hyun Taek Rim, Hyo Sub Jun, Jun Hyong Ahn, Ji Hee Kim, Jae Keun Oh, Joon Ho Song, Byung Moon Cho, In Bok Chang
OBJECTIVE: Cerebral venous thrombosis (CVT) is a rare condition for which few clinical reviews have been conducted in Korea. Our aim was to investigate, risk factors, clinical presentations/courses, and outcomes of 22 patients treated for CVT at two centers. MATERIALS AND METHODS: A retrospective analysis was conducted, selecting 22 patients diagnosed with and treated for CVT at two patient care centers over a 10-year period (January 1, 2004 to August 31, 2015)...
September 2016: Journal of Cerebrovascular and Endovascular Neurosurgery
https://www.readbyqxmd.com/read/27845308/-cerebral-venous-thrombosis
#17
E I Chukanova, A S Chukanova, Kh I Mamaeva
There is ample evidence that arterial and venous links of the vascular bed are interrelated, with the venous part, as the highly organized reflexogenic zone, responsible for the development of complex reactions providing the stability of the cerebral blood flow. There is few publications devoted to the venous pathology of the brain however the prevalence of cerebral venous thrombosis (CVT) is relatively high. The annual prevalence of CVT is 4-7 per 1 million of population. Timely recognition and early diagnosis of CVT are most important for successful treatment of patients...
2016: Zhurnal Nevrologii i Psikhiatrii Imeni S.S. Korsakova
https://www.readbyqxmd.com/read/27823855/red-cell-distribution-width-and-the-risk-of-cerebral-vein-thrombosis-a-case-control-study
#18
Alberto Maino, Maria Abbattista, Paolo Bucciarelli, Andrea Artoni, Serena M Passamonti, Silvia Lanfranconi, Ida Martinelli
BACKGROUND: Red cell distribution width (RDW) is a marker of cardiovascular diseases and venous thromboembolism, but its role in cerebral vein thrombosis (CVT) is unknown. AIMS: To investigate whether high values of RDW are associated with an increased risk of CVT. METHODS: A case-control study of CVT patients (≥18years-old) referred to our center contrasted with healthy individuals. Odds ratios (ORs) were calculated for RDW values >90th percentile by multivariable logistic regression and adjusted for demographic characteristics, hemorheological parameters, renal function, fibrinogen and CRP...
November 4, 2016: European Journal of Internal Medicine
https://www.readbyqxmd.com/read/27816347/cerebral-venous-thrombosis
#19
José Manuel Ferro, Patrícia Canhão, Diana Aguiar de Sousa
Cerebral venous thrombosis (CVT) has an incidence of 1.32/100,000/years in high-income countries, and higher in middle- and low-income countries. CVT is more frequent in infants and children young adults and females, especially during pregnancy/puerperium. CVT are now being diagnosed with increasing frequency because of the increased awareness and higher use of magnetic resonance imaging (MR) for investigating patients with acute and subacute headaches and new onset seizures. CVT rarely present as a stroke syndrome...
December 2016: La Presse Médicale
https://www.readbyqxmd.com/read/27815675/-what-can-anti-vegf-therapy-achieve-in-clinical-routine-effectiveness-of-anti-vegf-therapy-in-patients-with-macular-diseases-in-clinical-routine-on-1492-eyes-in-austria
#20
K Wiesinger, P Reinelt, A Ennemoser, M Edelmayr, U Schönherr
BACKGROUND: The aim of this user observational study was to illustrate the effectiveness of intravitreal operative medication administration (IVOM) in the clinical routine. DESIGN: A monocentric, single arm, prospective study. MATERIAL AND METHODS: Included in this study were all patients in whom a macular edema was diagnosed during an ophthalmological examination at the Barmherzigen Brüdern Hospital in Linz from November 2012 to August 2014 and who were treated as outpatients or day clinic patients with IVOM using anti-vascular endothelial growth factor (VEGF)...
November 4, 2016: Der Ophthalmologe: Zeitschrift der Deutschen Ophthalmologischen Gesellschaft
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