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https://www.readbyqxmd.com/read/29775278/hybrid-nanomaterials-with-single-site-catalysts-by-spatially-controllable-immobilization-of-nickel-complexes-via-photoclick-chemistry-for-alkene-epoxidation
#1
Dwaipayan Ghosh, Benny Febriansyah, Disha Gupta, Leonard Kia-Sheun Ng, Shibo Xi, Yonghua Du, Tom Baikie, ZhiLi Dong, Han Sen Soo
Catalyst deactivation is a persistent problem not only for the scientific community but also in industry. Isolated single-site heterogeneous catalysts have shown great promise to overcome these problems. Here, a versatile anchoring strategy for molecular complex immobilization on a broad range of semiconducting or insulating metal oxide (e.g. titanium dioxide, mesoporous silica, cerium oxide, and tungsten oxide) nanoparticles to synthesize isolated single-site catalysts has been studied systematically. An oxidatively stable anchoring group, maleimide, is shown to form covalent linkages with surface hydroxyl functionalities of metal oxide nanoparticles by photoclick chemistry...
May 18, 2018: ACS Nano
https://www.readbyqxmd.com/read/29773772/promoting-scientific-cooperation-in-times-of-diplomatic-challenges-sustained-partnership-between-the-cuban-academy-of-sciences-and-the-american-association-for-the-advancement-of-science
#2
Sergio Jorge-Pastrana, Marga Gual-Soler, Tom C Wang
Scientific research cooperation between Cuba and the USA has a long history that dates back to the 19th century. For the past 200 years, the two countries' relationship has been subject to complex economic, political and social forces. In the second half of the 20th century, the Cuban revolution and the subsequent escalation of the US government embargo impacted every aspect of Cuban life. While science was no exception, scientific interactions never ceased. Over the past decade, scientific cooperation-led and facilitated by scientific organizations such as the Cuban Academy of Sciences, the American Association for the Advancement of Science and others-has steadily increased to address ever more critical issues facing both countries...
April 2018: MEDICC Review
https://www.readbyqxmd.com/read/29754418/comprehensive-outcomes-after-lung-retransplantation-a-single-center-review
#3
Kieran Halloran, Meghan Aversa, Kathryn Tinckam, Tereza Martinu, Matthew Binnie, Cecilia Chaparro, Chung-Wai Chow, Tom Waddell, Karen McRae, Andrew Pierre, Marc de Perrot, Kazuhiro Yasufuku, Marcelo Cypel, Shaf Keshavjee, Lianne G Singer
INTRODUCTION: Lung retransplantation is an important therapy for a growing population of lung transplant recipients with graft failure, but detailed outcome data are lacking. METHODS: We conducted a retrospective cohort study of adult lung retransplant in the Toronto Lung Transplant Program from 2001 to 2013 (n=38). We analyzed the post-operative course, graft function, renal function, microbiology, donor specific antibodies (DSA), quality of life and survival compared to a control cohort of primary transplant recipients matched for age and era...
May 13, 2018: Clinical Transplantation
https://www.readbyqxmd.com/read/29750564/effects-of-offspring-and-parental-inbreeding-on-parent-offspring-communication
#4
Sarah N Mattey, Jon Richardson, Tom Ratz, Per T Smiseth
There is mounting evidence that inbreeding can have complex effects on social interactions among inbred and outbred individuals. Here, we investigate effects of offspring and maternal inbreeding on parent-offspring communication in the burying beetle Nicrophorus vespilloides. We find effects of the interaction between offspring and maternal inbreeding on maternal behavior. Outbred females provided more direct care toward inbred larvae, while inbred females provided similar levels of direct care toward inbred and outbred larvae...
June 2018: American Naturalist
https://www.readbyqxmd.com/read/29749288/changes-in-quality-of-life-among-enrollees-in-hennepin-health-a-medicaid-expansion-aco
#5
Katherine D Vickery, Nathan D Shippee, Laura M Guzman-Corrales, Cindy Cain, Sarah Turcotte Manser, Tom Walton, Jessica Richards, Mark Linzer
Despite limited program evaluations of Medicaid accountable care organizations (ACOs), no studies have examined if cost-saving goals negatively affect quality of life and health care experiences of low-income enrollees. The Hennepin Health ACO uses an integrated care model to address the physical, behavioral, and social needs of Medicaid expansion enrollees. As part of a larger evaluation, we conducted semistructured interviews with 35 primary care using Hennepin Health members enrolled for 2 or more years...
May 1, 2018: Medical Care Research and Review: MCRR
https://www.readbyqxmd.com/read/29747948/automated-quantification-of-mitral-valve-geometry-on-multi-slice-computed-tomography-in-patients-with-dilated-cardiomyopathy-implications-for-transcatheter-mitral-valve-replacement
#6
Tom Banks, Orod Razeghi, Ioannis Ntalas, Waqar Aziz, Jonathan M Behar, Rebecca Preston, Brian Campbell, Simon Redwood, Bernard Prendergast, Steven Niederer, Ronak Rajani
OBJECTIVES: The primary aim of this study was to quantify the dimensions and geometry of the mitral valve complex in patients with dilated cardiomyopathy and significant mitral regurgitation. The secondary aim was to evaluate the validity of an automated segmentation algorithm for assessment of the mitral valve compared to manual assessment on computed tomography. BACKGROUND: Transcatheter mitral valve replacement (TMVR) is an evolving technique which relies heavily on the lengthy evaluation of cardiac computed tomography (CT) datasets...
April 21, 2018: Journal of Cardiovascular Computed Tomography
https://www.readbyqxmd.com/read/29746340/recommendations-for-diagnosis-and-management-of-autoimmune-pancreatitis-in-childhood-consensus-from-insppire
#7
Isabelle Scheers, Joseph J Palermo, Steven Freedman, Michael Wilschanski, Uzma Shah, Maisam Abu-El-Haija, Bradley Barth, Douglas S Fishman, Cheryl Gariepy, Matthew J Giefer, Melvin B Heyman, Ryan W Himes, Sohail Z Husain, Tom K Lin, Quin Liu, Mark Lowe, Maria Mascarenhas, Veronique Morinville, Chee Y Ooi, Emily R Perito, David A Piccoli, John F Pohl, Sarah J Schwarzenberg, David Troendle, Steven Werlin, Bridget Zimmerman, Aliye Uc, Tanja Gonska
OBJECTIVES: Autoimmune pancreatitis (AIP) represents a complex immune-mediated pancreas disorder. Pediatric AIP (P-AIP) is rare. We have recently summarized the characteristic features of P-AIP. We now aim to develop recommendation statements to standardize the diagnostic and therapeutic approach to P-AIP and facilitate future research in the field. METHODS: A panel of pediatric gastroenterologists participating in the International Study Group of Pediatric Pancreatitis: In search for a cuRE (INSPPIRE) was formed to discuss and then vote on 15 recommendation statements...
May 9, 2018: Journal of Pediatric Gastroenterology and Nutrition
https://www.readbyqxmd.com/read/29742460/low-grade-inflammation-decreases-emotion-recognition-evidence-from-the-vaccination-model-of-inflammation
#8
Leonie Jt Balter, Sasha Hulsken, Sarah Aldred, Mark T Drayson, Suzanne Higgs, Jet Jcs Veldhuijzen van Zanten, Jane E Raymond, Jos A Bosch
The ability to adequately interpret the mental state of another person is key to complex human social interaction. Recent evidence suggests that this ability, considered a hallmark of 'theory of mind' (ToM), becomes impaired by inflammation. However, extant supportive empirical evidence is based on experiments that induce not only inflammation but also induce discomfort and sickness, factors that could also account for temporary social impairment. Hence, an experimental inflammation manipulation was applied that avoided this confound, isolating effects of inflammation and social interaction...
May 6, 2018: Brain, Behavior, and Immunity
https://www.readbyqxmd.com/read/29739280/abdominal-pain-after-roux-en-y-gastric-bypass-for-morbid-obesity
#9
Tom Mala, Ingvild Høgestøl
BACKGROUND AND AIMS: Roux-en-Y gastric bypass is widely used as treatment of morbid obesity. Weight loss, effects on obesity-related co-morbidities and quality of life are well documented post Roux-en-Y gastric bypass. Other outcome measures are less well studied. This review explores aspects of prevalence, diagnostic evaluations, etiology, and treatment of abdominal pain specific to Roux-en-Y gastric bypass. METHODS: The review is based on PubMed searches and clinical experience with Roux-en-Y gastric bypass...
May 1, 2018: Scandinavian Journal of Surgery: SJS
https://www.readbyqxmd.com/read/29737628/undoped-layered-perovskite-oxynitride-li2lata2o6n-for-photocatalytic-co2-reduction-with-visible-light
#10
Takayoshi Oshima, Tom Ichibha, Ken Sinkou Qin, Kanemichi Muraoka, Junie Jhon M Vequizo, Keisuke Hibino, Ryo Kuriki, Shunsuke Yamashita, Kenta Hongo, Tomoki Uchiyama, Kotaro Fujii, Daling Lu, Ryo Maezono, Akira Yamakata, Hideki Kato, Koji Kimoto, Masatomo Yashima, Yoshiharu Uchimoto, Masato Kakihana, Osamu Ishitani, Hiroshi Kageyama, Kazuhiko Maeda
Oxynitrides are promising visible-light-responsive photocatalysts, but their structures are almost confined with three-dimensional (3D) structures such as perovskites. Here, we successfully prepared a phase-pure Li2LaTa2O6N with a layered perovskite structure by thermal ammonolysis of a lithium-rich oxide precursor. Li2LaTa2O6N exhibited high crystallinity and visible light absorption up to 500 nm. As opposed to well-known 3D oxynitride perovskites, Li2LaTa2O6N supported by a binuclear Ru(II) complex was capable of stably and selectively converting CO2 into formate under visible light (λ > 400 nm)...
May 8, 2018: Angewandte Chemie
https://www.readbyqxmd.com/read/29737037/sensitivity-analysis-of-geometrical-parameters-to-study-haemodynamics-and-thrombus-formation-in-the-left-atrial-appendage
#11
Guadalupe García Isla, Andy Luis Olivares, Etelvino Silva, Marta Nuñez-García, Constantine Butakoff, Damian Sanchez-Quintana, Hernán Morales, Xavier Freixa, Jérôme Noailly, Tom de Potter, Oscar Camara
The left atrial appendage (LAA) is a complex and heterogeneous protruding structure of the left atrium (LA). In atrial fibrillation (AF) patients, it is the location where 90% of the thrombi are formed. However, the role of the LAA in thrombus formation is not fully known yet. The main goal of this work is to perform a sensitivity analysis to identify the most relevant LA and LAA morphological parameters in atrial blood flow dynamics. Simulations were run on synthetic ellipsoidal left atria models where different parameters were individually studied: pulmonary veins (PV) and mitral valve (MV) dimensions; LAA shape; and LA volume...
May 8, 2018: International Journal for Numerical Methods in Biomedical Engineering
https://www.readbyqxmd.com/read/29735739/the-allosteron-model-for-entropic-allostery-of-self-assembly
#12
Tom McLeish, C Schaefer, A C von der Heydt
Using the simple 'allosteron' model, we show that it is possible, in principle, to elicit pathways by which fluctuation allostery affects self-assembly of protein complexes. We treat the cases of (i) protein fibrils and nucleation, (ii) n -mer protein complexes, and (iii) weakly attractive allosteric interactions in protein-like soft nanoscale objects that can be tuned to define exclusive self-associating families.This article is part of a discussion meeting issue 'Allostery and molecular machines'.
June 19, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/29735483/inability-to-detect-cross-reactive-memory-t-cells-challenges-the-frequency-of-heterologous-immunity-among-common-viruses
#13
Louise C Rowntree, Thi H O Nguyen, Hanim Halim, Anthony W Purcell, Jamie Rossjohn, Stephanie Gras, Tom C Kotsimbos, Nicole A Mifsud
Human memory T cells that cross-react with epitopes from unrelated viruses can potentially modulate immune responses to subsequent infections by a phenomenon termed heterologous immunity. However, it is unclear whether similarities in structure rather than sequence underpin heterologous T cell cross-reactivity. In this study, we aimed to explore the mechanism of heterologous immunity involving immunodominant epitopes derived from common viruses restricted to high-frequency HLA allotypes (HLA-A*02:01, -B*07:02, and -B*08:01)...
May 7, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29733632/a-stable-narrow-gap-oxyfluoride-photocatalyst-for-visible-light-hydrogen-evolution-and-carbon-dioxide-reduction
#14
Ryo Kuriki, Tom Ichibha, Kenta Hongo, Daling Lu, Ryo Maezono, Hiroshi Kageyama, Osamu Ishitani, Kengo Oka, Kazuhiko Maeda
Mixed anion compounds such as oxynitrides and oxychalcogenides are recognized as potential candidates of visible-light-driven photocatalysts since, as compared with oxygen 2p orbitals, p orbitals of less electronegative anion (e.g., N3-, S2-) can form a valence band that has more negative potential. In this regard, oxyfluorides appear unsuitable because of the higher electronegativity of fluorine. Here we show an exceptional case, an anion-ordered pyrochlore oxyfluoride Pb2Ti2O5.4F1.2 that has a small band gap (ca...
May 7, 2018: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/29727183/dynamics-determine-signaling-in-a-multicomponent-system-associated-with-rheumatoid-arthritis
#15
Cecilia Lindgren, Mohit Tyagi, Johan Viljanen, Johannes Toms, Changrong Ge, Naru Zhang, Rikard Holmdahl, Jan Kihlberg, Anna Linusson
Strategies that target multiple components are usually required for treatment of diseases originating from complex biological systems. The multicomponent system consisting of the DR4 major histocompatibility complex type II molecule, the glycopeptide CII259-273 from type II collagen, and a T-cell receptor is associated with development of rheumatoid arthritis (RA). We introduced non-native amino acids and amide bond isosteres into CII259-273 and investigated the effect on binding to DR4 and the subsequent T-cell response...
May 4, 2018: Journal of Medicinal Chemistry
https://www.readbyqxmd.com/read/29721667/the-influence-of-mutational-status-and-biological-characteristics-of-acute-myeloid-leukemia-on-xenotransplantation-outcomes-in-nod-scid-gamma-mice
#16
Martin Culen, Zdenka Kosarova, Ivana Jeziskova, Adam Folta, Jana Chovancova, Tomas Loja, Nikola Tom, Vojtech Bystry, Veronika Janeckova, Dana Dvorakova, Jiri Mayer, Zdenek Racil
PURPOSE: This study aimed at analyzing the association of gene mutations and other acute myeloid leukemia (AML) characteristics with engraftment outcomes in immunodeficient mice and to select the engraftment outcomes that best reflect patient survival. METHODS: Mutations in 19 genes as well as leukemia- and patient-related characteristics were analyzed for a group of 47 de novo AML samples with respect to three engraftment outcomes: engraftment ability, engraftment intensity (percentage of hCD45+ cells) and engraftment latency...
May 2, 2018: Journal of Cancer Research and Clinical Oncology
https://www.readbyqxmd.com/read/29721573/the-utility-of-polarization-modulation-infrared-reflection-absorption-spectroscopy-pm-irras-in-surface-and-in-situ-studies-new-data-processing-and-presentation-approach
#17
Evans A Monyoncho, Vlad Zamlynny, Tom K Woo, Elena A Baranova
Infrared spectroscopy is a powerful non-destructive technique for the identification and quantification of organic molecules widely used in scientific studies. For many years, efforts have been made to adopt this technique for the in situ monitoring of reactions. From these efforts, polarization modulation infrared reflection absorption spectroscopy (PM-IRRAS) was developed three decades ago. Unfortunately, because of the complexity of data processing and interpretation, PM-IRRAS had been avoided in lieu of the single potential alteration infrared spectroscopy (SPAIRS) and subtractively normalized interfacial Fourier transform infrared (SNIFTIR)...
May 3, 2018: Analyst
https://www.readbyqxmd.com/read/29719269/mechanistic-insights-into-er-associated-protein-degradation
#18
REVIEW
Xudong Wu, Tom A Rapoport
Misfolded proteins of the endoplasmic reticulum (ER) are discarded by a conserved process, called ER-associated protein degradation (ERAD). ERAD substrates are retro-translocated into the cytosol, polyubiquitinated, extracted from the ER membrane, and ultimately degraded by the proteasome. Recent in vitro experiments with purified components have given insight into the mechanism of ERAD. ERAD substrates with misfolded luminal or intramembrane domains are moved across the ER membrane through a channel formed by the multispanning ubiquitin ligase Hrd1...
April 29, 2018: Current Opinion in Cell Biology
https://www.readbyqxmd.com/read/29718935/automatic-identification-of-optimal-marker-genes-for-phenotypic-and-taxonomic-groups-of-microorganisms
#19
Elad Segev, Zohar Pasternak, Tom Ben Sasson, Edouard Jurkevitch, Mira Gonen
Finding optimal markers for microorganisms important in the medical, agricultural, environmental or ecological fields is of great importance. Thousands of complete microbial genomes now available allow us, for the first time, to exhaustively identify marker proteins for groups of microbial organisms. In this work, we model the biological task as the well-known mathematical "hitting set" problem, solving it based on both greedy and randomized approximation algorithms. We identify unique markers for 17 phenotypic and taxonomic microbial groups, including proteins related to the nitrite reductase enzyme as markers for the non-anammox nitrifying bacteria group, and two transcription regulation proteins, nusG and yhiF, as markers for the Archaea and Escherichia/Shigella taxonomic groups, respectively...
2018: PloS One
https://www.readbyqxmd.com/read/29717875/a-single-mutation-traps-a-half-sites-reactive-enzyme-in-midstream-explaining-asymmetry-in-hydride-transfer
#20
Janet S Finer-Moore, Tom T Lee, Robert M Stroud
In Escherichia coli thymidylate synthase (EcTS), rate-determining hydride transfer from the cofactor 5,10-methylene-5,6,7,8-tetrahydrofolate to the intermediate 5-methylene-2'-deoxyuridine 5'-monophosphate occurs by hydrogen tunneling, requiring precise alignment of reactants and a closed binding cavity, sealed by the C-terminal carboxyl group. Mutations that destabilize the closed conformation of the binding cavity allow small molecules such as β-mercaptoethanol (β-ME) to enter the active site and compete with hydride for addition to the 5-methylene group of the intermediate...
May 2, 2018: Biochemistry
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