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https://www.readbyqxmd.com/read/28432703/selective-calixarene-directed-synthesis-of-mxene-plates-crumpled-sheets-spheres-and-scrolls
#1
Arni Vaughn, Jeremy Ball, Tobias Heil, David Morgan, Giulio Lampronti, Gabija Maršalkaitė, Colin L Raston, Nicholas P Power, Suela Kellici
Fully exploiting the electronic and mechanical properties of 2D laminar materials not only requires efficient and effective means of their exfoliation into low dimensional layers, but also necessitates a means of changing their morphology so as to explore any enhancement that this may offer. MXenes are a rapidly emerging new class of such laminar materials with unique properties. However, access to other morphologies of MXenes has not yet been fully realised. To this end we have developed the synthesis of MXenes (Ti2C) as plates, crumpled sheets, spheres and scrolls, which involves selective intercalation of p-phosphonic calix[n]arenes, with control in morphology arising from the choice of the size of the macrocycle, n = 4, 5, 6 or 8...
April 21, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28419972/neprilysin-inhibitors-a-new-hope-to-halt-the-diabetic-cardiovascular-and-renal-complications
#2
REVIEW
Vajir Malek, Anil Bhanudas Gaikwad
Diabetes is an enormous and ever-growing calamity and a global public health threat of the 21st century. Besides insulin and oral hypoglycaemic drugs, blockage of the renin-angiotensin system (RAS) denotes a key pharmacotherapy for the management of cardiovascular (CVD) and chronic kidney diseases (CKD), which are the leading causes of disability and death among diabetic patients. Neprilysin (NEP) inhibition, auxiliary to RAS blockage increases the bioavailability of natriuretic peptides and benefits the cardio-renal system...
April 15, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/28405777/how-visual-working-memory-contents-influence-priming-of-visual-attention
#3
Nancy B Carlisle, Árni Kristjánsson
Recent evidence shows that when the contents of visual working memory overlap with targets and distractors in a pop-out search task, intertrial priming is inhibited (Kristjánsson, Sævarsson & Driver, Psychon Bull Rev 20(3):514-521, 2013, Experiment 2, Psychonomic Bulletin and Review). This may reflect an interesting interaction between implicit short-term memory-thought to underlie intertrial priming-and explicit visual working memory. Evidence from a non-pop-out search task suggests that it may specifically be holding distractors in visual working memory that disrupts intertrial priming (Cunningham & Egeth, Psychol Sci 27(4):476-485, 2016, Experiment 2, Psychological Science)...
April 12, 2017: Psychological Research
https://www.readbyqxmd.com/read/28401875/-tumors-of-unknown-origin-case-report
#4
Arni Jon Geirsson, Sigridur Thordis Valtysdottir, Andres Sigvaldason, Margret Sigurdardottir
IgG4 related disease is a recently recognized chronic fibrotic, inflammatory condition, caused by infiltrating IgG4 positive plasma cells that can cause tumor like disease in almost any organ in the body. Typical histopathology is lymphoplasmocytic infiltration of IgG4 positive cells, storiform fibrosis and obliterative phlebitis. Glucocorticoids alone or in combination with B-cell depletion with rituximab causes often good, lasting response. We present here a lady with recurrent lung infiltration that simulated pneumonia and later tumor of the lung...
April 2017: Læknablađiđ
https://www.readbyqxmd.com/read/28385919/supplementing-an-energy-adequate-higher-protein-diet-with-protein-does-not-enhance-fat-free-mass-restoration-after-short-term-severe-negative-energy-balance
#5
Claire E Berryman, John J Sepowitz, Holly L McClung, Harris R Lieberman, Emily K Farina, James P McClung, Arny A Ferrando, Stefan M Pasiakos
Negative energy balance during military operations can be severe and result in significant reductions in fat-free mass (FFM). Consuming supplemental high-quality protein following such military operations may accelerate restoration of FFM. Body composition (dual-energy x-ray absorptiometry) and whole-body protein turnover (single-pool (15)N-alanine method) were determined before (PRE) and after 7 d (POST) of severe negative energy balance during military training in 63 male US Marines (mean±SD, 25±3 y, 84±9 kg)...
April 6, 2017: Journal of Applied Physiology
https://www.readbyqxmd.com/read/28377626/problems-with-visual-statistical-learning-in-developmental-dyslexia
#6
Heida Maria Sigurdardottir, Hilda Bjork Danielsdottir, Margret Gudmundsdottir, Kristjan Helgi Hjartarson, Elin Astros Thorarinsdottir, Árni Kristjánsson
Previous research shows that dyslexic readers are impaired in their recognition of faces and other complex objects, and show hypoactivation in ventral visual stream regions that support word and object recognition. Responses of these brain regions are shaped by visual statistical learning. If such learning is compromised, people should be less sensitive to statistically likely feature combinations in words and other objects, and impaired visual word and object recognition should be expected. We therefore tested whether people with dyslexia showed diminished capability for visual statistical learning...
April 4, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28359417/early-adoption-of-sacubitril-valsartan-for-patients-with-heart-failure-with-reduced-ejection-fraction-insights-from-get-with-the-guidelines-heart-failure-gwtg-hf
#7
Nancy Luo, Gregg C Fonarow, Steven J Lippmann, Xiaojuan Mi, Paul A Heidenreich, Clyde W Yancy, Melissa A Greiner, Bradley G Hammill, N Chantelle Hardy, Stuart J Turner, Warren K Laskey, Lesley H Curtis, Adrian F Hernandez, Robert J Mentz, Emily C O'Brien
OBJECTIVES: The aim of this study was to assess the prevalence and variation in angiotensin receptor/neprilysin inhibitor (ARNI) prescription among a real-world population with heart failure with reduced ejection fraction (HFrEF). BACKGROUND: The U.S. Food and Drug Administration approved sacubitril/valsartan for patients with HFrEF in July 2015. Little is known about the early patterns of use of this novel therapy. METHODS: The study included patients discharged alive from hospitals in Get With the Guidelines-Heart Failure (GWTG-HF), a registry of hospitalized patients with heart failure, between July 2015 and June 2016 who had documentation of whether ARNIs were prescribed at discharge...
April 2017: JACC. Heart Failure
https://www.readbyqxmd.com/read/28357089/chromothripsis-and-progression-free-survival-in-metastatic-colorectal-cancer
#8
Elina Skuja, Dagnija Kalniete, Miki Nakazawa-Miklasevica, Zanda Daneberga, Arnis Abolins, Gunta Purkalne, Edvins Miklasevics
Metastatic dissemination of the primary tumor is the major cause of death in colorectal cancer (CRC) patients. Multiple chromosomal breaks and chromothripsis, a phenomenon involving multiple chromosomal fragmentations occurring in a single catastrophic event, are associated with cancer genesis, progression and developing of metastases. The aim of this study was to evaluate the effect of chromothripsis and total breakpoint count (breakpoint instability index) on progression-free survival (PFS). A total of 19 patients with metastatic CRC (mCRC) receiving FOLFOX first-line palliative chemotherapy between August, 2011 and October, 2012 were selected for this study...
February 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28326642/neprilysin-inhibition-in-heart-failure-mechanisms-and-substrates-beyond-modulating-natriuretic-peptides
#9
REVIEW
Emilia D'Elia, Attilio Iacovoni, Muthiah Vaduganathan, Ferdinando L Lorini, Stefano Perlini, Michele Senni
The autonomic nervous system, the renin-angiotensin-aldosterone system, and the natriuretic peptide system represent critical regulatory pathways in heart failure and as such have been the major targets of pharmacological development. The introduction and approval of angiotensin receptor neprilysin inhibitors (ARNi) have broadened the available drug treatments of patients with chronic heart failure with reduced ejection fraction. Neprilysin catalyses the degradation of a number of vasodilator peptides, including the natriuretic peptides, bradykinin, substance P, and adrenomedullin, as well as vasoconstrictor peptides, including endothelin-1 and angiotensin I and II...
March 21, 2017: European Journal of Heart Failure
https://www.readbyqxmd.com/read/28318687/protein-intake-distribution-pattern-does-not-affect-anabolic-response-lean-body-mass-muscle-strength-or-function-over-8-weeks-in-older-adults-a-randomized-controlled-trial
#10
Il-Young Kim, Scott Schutzler, Amy M Schrader, Horace J Spencer, Gohar Azhar, Robert R Wolfe, Arny A Ferrando
BACKGROUND & AIMS: In our recent acute metabolic study, we found no differences in the anabolic response to differing patterns of dietary protein intake. To confirm this in a chronic study, we investigated the effects of protein distribution pattern on functional outcomes and protein kinetics in older adults over 8 weeks. METHODS: To determine chronic effects of protein intake pattern at 1.1 g protein/kg/day in mixed meals on lean body mass (LBM), functional outcomes, whole body protein kinetics and muscle protein fractional synthesis rate (MPS) over 8-week respective dietary intervention, fourteen older subjects were randomly divided into either EVEN or UNVEN group...
March 3, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
https://www.readbyqxmd.com/read/28296987/an-asymptomatic-hyperpigmented-eruption-on-the-lower-extremities
#11
Sam Z Awan, Justin Finch, Arni Kristjansson
No abstract text is available yet for this article.
March 15, 2017: JAMA Dermatology
https://www.readbyqxmd.com/read/28245500/rapid-learning-of-visual-ensembles
#12
Andrey Chetverikov, Gianluca Campana, Árni Kristjánsson
We recently demonstrated that observers are capable of encoding not only summary statistics, such as mean and variance of stimulus ensembles, but also the shape of the ensembles. Here, for the first time, we show the learning dynamics of this process, investigate the possible priors for the distribution shape, and demonstrate that observers are able to learn more complex distributions, such as bimodal ones. We used speeding and slowing of response times between trials (intertrial priming) in visual search for an oddly oriented line to assess internal models of distractor distributions...
February 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28228185/knowledge-of-childhood-materiality-text-and-the-history-of-science-an-interdisciplinary-round-table-discussion
#13
Felix Rietmann, Mareike Schildmann, Caroline Arni, Daniel Thomas Cook, Davide Giuriato, Novina Göhlsdorf, Wangui Muigai
This round table discussion takes the diversity of discourse and practice shaping modern knowledge about childhood as an opportunity to engage with recent historiographical approaches in the history of science. It draws attention to symmetries and references among scientific, material, literary and artistic cultures and their respective forms of knowledge. The five participating scholars come from various fields in the humanities and social sciences and allude to historiographical and methodological questions through a range of examples...
February 23, 2017: British Journal for the History of Science
https://www.readbyqxmd.com/read/28203593/effects-of-sex-and-fatigue-on-biomechanical-measures-during-the-drop-jump-task-in-children
#14
Kristín Briem, Kolbrún Vala Jónsdóttir, Árni Árnason, Þórarinn Sveinsson
BACKGROUND: Female athletes have a higher rate of anterior cruciate ligament (ACL) injury than males from adolescence and into maturity, which is suggested to result from sex-specific changes in dynamic movement patterns with maturation. Few studies have studied movement strategies and response to fatigue in children. PURPOSE: To evaluate the effect of fatigue on biomechanical variables associated with increased risk for ACL injury during a drop-jump (DJ) performance in children...
January 2017: Orthopaedic Journal of Sports Medicine
https://www.readbyqxmd.com/read/28202500/canwalk-a-feasibility-study-with-embedded-randomised-controlled-trial-pilot-of-a-walking-intervention-for-people-with-recurrent-or-metastatic-cancer
#15
Vicki Tsianakas, Jenny Harris, Emma Ream, Mieke Van Hemelrijck, Arnie Purushotham, Lorelei Mucci, James S A Green, Jacquetta Fewster, Jo Armes
OBJECTIVES: Walking is an adaptable, inexpensive and accessible form of physical activity. However, its impact on quality of life (QoL) and symptom severity in people with advanced cancer is unknown. This study aimed to assess the feasibility and acceptability of a randomised controlled trial (RCT) of a community-based walking intervention to enhance QoL in people with recurrent/metastatic cancer. DESIGN: We used a mixed-methods design comprising a 2-centre RCT and nested qualitative interviews...
February 15, 2017: BMJ Open
https://www.readbyqxmd.com/read/28185171/neprilysin-inhibitors-in-cardiovascular-disease
#16
REVIEW
Guson Kang, Dipanjan Banerjee
Mortality from heart failure remains high despite advances in medical therapy over the last three decades. Angiotensin receptor-neprilysin inhibitor (ARNI) combinations are the latest addition to the heart failure medical armamentarium, which is built on the cornerstone regimen of beta blockers, angiotensin converting enzyme (ACE) inhibitors/angiotensin receptor blockers, and aldosterone antagonists. Recent trial data have shown a significant mortality benefit from ARNIs, which, as of May 2016, have now received a class I recommendation for use in patients with heart failure and reduced ejection fraction from the major American and European cardiology societies...
February 2017: Current Cardiology Reports
https://www.readbyqxmd.com/read/28178694/resolution-of-cheyne-stokes-respiration-after-treatment-of-heart-failure-with-sacubitril-valsartan-a-first-case-report
#17
Henrik Fox, Thomas Bitter, Dieter Horstkotte, Olaf Oldenburg
Sleep-disordered breathing (SDB) is highly prevalent in patients with heart failure (HF), and is known to be associated with a worse prognosis. The severity of central sleep apnea is thought to mirror cardiac dysfunction. The novel angiotensin receptor-neprilysin inhibitor (ARNi) sacubitril has been shown to improve HF, but a relationship between treatment with ARNi and the severity of SDB has not yet been investigated. We report the case of a 71-year-old male with HF and SDB. Treatment with sacubitril/valsartan was associated with improved cardiac function, as shown by a reduction in the level of N-terminal prohormone of brain natriuretic peptide from 3,249 to 1,720 pg/mL, and an improvement in left-ventricular ejection fraction from 30 to 35%...
February 9, 2017: Cardiology
https://www.readbyqxmd.com/read/28176661/cold-shock-protein-a-from-corynebacterium-pseudotuberculosis-role-of-electrostatic-forces-in-the-stability-of-the-secondary-structure
#18
Monika A Coronado, Icaro P Caruso, Vinícius M De Oliveira, Vinícius G Contessoto, Vitor B P Leite, L A Kawai, Raghuvir K Arni, Raphael J Eberle
The conformational stability of the Cold shock protein A (CspA) from C. pseudotuberculosis (Cp), a nucleic acid binding protein in function of pH and salt concentration was examined by using differential scanning calorimetry and CD spectroscopy in combination with computational analysis to identify the specify amino acids undergoing change. Our approach identified a sodium-binding site in CpCspA and at pH 8.0 a significant reduction in the β-sheet content was observed which resulted in a decrease of the protein thermal stability...
February 7, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28133468/changing-the-treatment-of-heart-failure-with-reduced-ejection-fraction-clinical-use-of-sacubitril-valsartan-combination
#19
REVIEW
Edgardo Kaplinsky
Despite significant therapeutic advances, patients with chronic heart failure (HF) remain at high risk of morbidity and mortality. Sacubitril valsartan (previously known as LCZ696) is a new oral agent approved for the treatment of symptomatic chronic heart failure in adults with reduced ejection fraction. It is described as the first in class angiotensin receptor neprilysin inhibitor (ARNI) since it incorporates the neprilysin inhibitor, sacubitril and the angiotensin II receptor antagonist, valsartan. Neprilysin is an endopeptidase that breaks down several vasoactive peptides including natriuretic peptides (NPs), bradykinin, endothelin and angiotensin II (Ang-II)...
November 2016: Journal of Geriatric Cardiology: JGC
https://www.readbyqxmd.com/read/28099764/the-posttraumatic-growth-inventory-a-revision-integrating-existential-and-spiritual-change
#20
Richard G Tedeschi, Arnie Cann, Kanako Taku, Emre Senol-Durak, Lawrence G Calhoun
Spiritual Change (SC) is one of 5 domains of posttraumatic growth (PTG). The current Posttraumatic Growth Inventory (PTGI) assesses this area of growth with only 2 items, one focusing on religiosity and the other focusing on spiritual understanding. The addition of 4 newly developed spiritual-existential change (SEC) items, creating an expanded PTGI (Posttraumatic Growth Inventory-X), reflects a diversity of perspectives on spiritual-existential experiences that are represented in different cultures. Samples were obtained from 3 countries: the United States (n = 250), Turkey (n = 502), and Japan (n = 314)...
February 2017: Journal of Traumatic Stress
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