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https://www.readbyqxmd.com/read/29786862/experimental-fluence-modulated-proton-computed-tomography-by-pencil-beam-scanning
#1
George Dedes, Robert P Johnson, Mark Pankuch, Nick Detrich, Willemijn M A Pols, Simon Rit, Reinhard W Schulte, Katia Parodi, Guillaume Landry
PURPOSE: This experimental study is aimed at demonstrating, using a simple cylindrical water phantom, the feasibility of fluence modulated proton computed tomography (FMpCT) by pencil beam scanning (PBS) proton computed tomography (pCT). METHODS: The phase II pCT prototype of the Loma Linda U. and U. C. Santa Cruz was operated using the PBS beam line of the Northwestern Medicine Chicago Proton Center. A 20x10 grid of 1.37 cm full width half maximum pencil beams (PB) equally spaced by 1 cm was used to acquire 45 projections in step and shoot mode...
May 22, 2018: Medical Physics
https://www.readbyqxmd.com/read/29786721/versatile-organoaluminium-catalysts-based-on-heteroscorpionate-ligands-for-the-preparation-of-polyesters
#2
J Martínez, M Martínez de Sarasa Buchaca, F de la Cruz-Martínez, C Alonso-Moreno, L F Sánchez-Barba, J Fernandez-Baeza, A M Rodríguez, A Rodríguez-Diéguez, J A Castro-Osma, A Otero, A Lara-Sánchez
A series of alkyl aluminium complexes based on heteroscorpionate ligands were designed as catalysts for the ring-opening polymerisation of cyclic esters and ring-opening copolymerisation of epoxides and anhydrides. Treatment of AlX3 (X = Me, Et) with ligands bpzbeH [bpzbe = 1,1-bis(3,5-dimethylpyrazol-1-yl)-3,3-dimethyl-2-butoxide], bpzteH [bpzte = 2,2-bis(3,5-dimethylpyrazol-1-yl)-1-para-tolylethoxide], and (R,R)-bpzmmH [(R,R)-bpzmm = (1R)-1-{(1R)-6,6-dimethyl-bicyclo[3.1.1]-2-hepten-2-yl}-2,2-bis(3,5-dimethylpyrazol-1-yl)ethoxide] for 2 hours at 0 °C afforded the mononuclear dialkyl aluminium complexes [AlMe2{κ2-bpzbe}] (1), [AlEt2{κ2-bpzbe}] (2), [AlMe2{κ2-(R,R)-bpzmm}] (3) and [AlEt2{κ2-(R,R)-bpzmm}] (4), and the dinuclear dialkyl complexes [AlMe2{κ2-bpzte}]2 (5) and [AlEt2{κ2-bpzte}]2 (6)...
May 22, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29785350/the-effect-of-climate-change-on-the-distribution-of-a-tropical-zoanthid-palythoa-caribaeorum-and-its-ecological-implications
#3
Leonardo M Durante, Igor C S Cruz, Tito M C Lotufo
Palythoa caribaeorum is a zoanthid often dominant in shallow rocky environments along the west coast of the Atlantic Ocean, from the tropics to the subtropics. This species has high environmental tolerance and is a good space competitor in reef environments. Considering current and future scenarios in the global climate regime, this study aimed to model and analyze the distribution of P. caribaeorum , generating maps of potential distribution for the present and the year 2100. The distribution was modeled using maximum entropy (Maxent) based on 327 occurrence sites retrieved from the literature...
2018: PeerJ
https://www.readbyqxmd.com/read/29784332/whey-acerola-flavoured-drink-submitted-ohmic-heating-bioactive-compounds-antioxidant-capacity-thermal-behavior-water-mobility-fatty-acid-profile-and-volatile-compounds
#4
Leandro P Cappato, Marcus Vinicius S Ferreira, Jeremias Moraes, Roberto P S Pires, Ramon S Rocha, Ramon Silva, Roberto P C Neto, Maria Inês B Tavares, Mônica Q Freitas, Flavio N Rodrigues, Veronica M A Calado, Renata S L Raices, Marcia C Silva, Adriano G Cruz
Whey acerola-flavoured drink was subjected to Ohmic Heating (OH) under different operational conditions (45, 60, 80 V at 60 Hz and 10, 100, 1000 Hz with 25 V, 65 °C/30 min) and conventional pasteurization (65 °C/30 min). Bioactive compounds (total phenolics, DPPH, FRAP, ACE levels), fatty acid profile, volatile compounds (CG-MS), thermal behaviors (DSC) and water mobility (TD-NMR) were performed. Reduction of frequency (1000-10 Hz) resulted in a lower bioactive compounds and antioxidant capacity of the samples, except for the DPPH values...
October 15, 2018: Food Chemistry
https://www.readbyqxmd.com/read/29782832/nup159-weakens-gle1-binding-to-dbp5-but-does-not-accelerate-adp-release
#5
Emily V Wong, Shawn Gray, Wenxiang Cao, Rachel Montpetit, Ben Montpetit, Enrique M De La Cruz
Dbp5, DDX19 in humans, is an essential DEAD-box protein involved in mRNA export, which has also been linked to other cellular processes, including rRNA export and translation. Dbp5 ATPase activity is regulated by several factors, including RNA, the nucleoporin proteins Nup159 and Gle1, and the endogenous small molecule inositol hexakisphosphate (InsP6 ). To better understand how these factors modulate Dbp5 activity and how this modulation relates to in vivo RNA metabolism, a detailed characterization of the Dbp5 mechanochemical cycle in the presence of those regulators individually or together is necessary...
May 18, 2018: Journal of Molecular Biology
https://www.readbyqxmd.com/read/29781304/a-phytochemical-study-of-the-cuphea-glutinosa-from-southern-brazil-na-k-atpase-activity-inhibition-and-antioxidant-properties
#6
Adriana M Zago, Fabiano B Carvalho, Jessié Martins Gutierres, Crystiani Bohnert, Marilda da Cruz Fernandes, Liziane M Morandini, Helena S Coelho, Aline O Fogaça, Cinthia M Andrade, Marco A Mostardeiro, Ionara I Dalcol, Ademir F Morel
This study investigated the antioxidant activity of Cuphea glutinosa (CG) and its effect on Na+ , K+ -ATPase from cardiac muscle. The ethanolic extract showed higher antioxidant capacity compared to aqueous and ethyl acetate fraction. Ethyl acetate fraction showed β-sitosterol-3-O-β-glucoside, kaempferol, quercetin, isoquercetin, gallic acid methyl ester, and gallic acid. The ethanolic extract also reduced the Na+ ,K+ -ATPase activity. CG presented a promising antioxidant activity and inhibitory effect on the Na+ , K+ -ATPase activity, supporting biochemical evidences the popular use of this plant in the treatment of heart failure...
May 21, 2018: Natural Product Research
https://www.readbyqxmd.com/read/29780523/enantiopure-distorted-ribbon-shaped-nanographene-combining-two-photon-absorption-based-upconversion-and-circularly-polarized-luminescence
#7
Carlos M Cruz, Irene R Márquez, Inês F A Mariz, Victor Blanco, Carlos Sánchez-Sánchez, Jesús M Sobrado, José A Martín-Gago, Juan M Cuerva, Ermelinda Maçôas, Araceli G Campaña
Herein we describe a distorted ribbon-shaped nanographene exhibiting unprecedented combination of optical properties in graphene-related materials, namely upconversion based on two-photon absorption (TPA-UC) together with circularly polarized luminescence (CPL). The compound is a graphene molecule of ca. 2 nm length and 1 nm width with edge defects that promote the distortion of the otherwise planar lattice. The edge defects are an aromatic saddle-shaped ketone unit and a [5]carbohelicene moiety. This system is shown to combine two-photon absorption and circularly polarized luminescence and a remarkably long emission lifetime of 21...
April 28, 2018: Chemical Science
https://www.readbyqxmd.com/read/29779943/astroglial-cb-1-receptors-determine-synaptic-d-serine-availability-to-enable-recognition-memory
#8
Laurie M Robin, José F Oliveira da Cruz, Valentin C Langlais, Mario Martin-Fernandez, Mathilde Metna-Laurent, Arnau Busquets-Garcia, Luigi Bellocchio, Edgar Soria-Gomez, Thomas Papouin, Marjorie Varilh, Mark W Sherwood, Ilaria Belluomo, Georgina Balcells, Isabelle Matias, Barbara Bosier, Filippo Drago, Ann Van Eeckhaut, Ilse Smolders, Francois Georges, Alfonso Araque, Aude Panatier, Stéphane H R Oliet, Giovanni Marsicano
Bidirectional communication between neurons and astrocytes shapes synaptic plasticity and behavior. D-serine is a necessary co-agonist of synaptic N-methyl-D-aspartate receptors (NMDARs), but the physiological factors regulating its impact on memory processes are scantly known. We show that astroglial CB1 receptors are key determinants of object recognition memory by determining the availability of D-serine at hippocampal synapses. Mutant mice lacking CB1 receptors from astroglial cells (GFAP-CB1 -KO) displayed impaired object recognition memory and decreased in vivo and in vitro long-term potentiation (LTP) at CA3-CA1 hippocampal synapses...
May 15, 2018: Neuron
https://www.readbyqxmd.com/read/29779890/high-throughput-screening-enhances-kidney-organoid-differentiation-from-human-pluripotent-stem-cells-and-enables-automated-multidimensional-phenotyping
#9
Stefan M Czerniecki, Nelly M Cruz, Jennifer L Harder, Rajasree Menon, James Annis, Edgar A Otto, Ramila E Gulieva, Laura V Islas, Yong Kyun Kim, Linh M Tran, Timothy J Martins, Jeffrey W Pippin, Hongxia Fu, Matthias Kretzler, Stuart J Shankland, Jonathan Himmelfarb, Randall T Moon, Neal Paragas, Benjamin S Freedman
Organoids derived from human pluripotent stem cells are a potentially powerful tool for high-throughput screening (HTS), but the complexity of organoid cultures poses a significant challenge for miniaturization and automation. Here, we present a fully automated, HTS-compatible platform for enhanced differentiation and phenotyping of human kidney organoids. The entire 21-day protocol, from plating to differentiation to analysis, can be performed automatically by liquid-handling robots, or alternatively by manual pipetting...
May 15, 2018: Cell Stem Cell
https://www.readbyqxmd.com/read/29778070/high-intensity-binge-drinking-is-associated-with-alterations-in-spontaneous-neural-oscillations-in-young-adults
#10
Rifqi O Affan, Siyuan Huang, Stephen M Cruz, Lee A Holcomb, Edward Nguyen, Ksenija Marinkovic
Heavy episodic alcohol consumption (also termed binge drinking) contributes to a wide range of health and cognitive deficits, but the associated brain-based indices are poorly understood. The current study used electroencephalography (EEG) to examine spontaneous neural oscillations in young adults as a function of quantity, frequency, and the pattern of their alcohol consumption. Sixty-one young adults (23.4 ± 3.4 years of age) were assigned to binge drinking (BD) and light drinking (LD) groups that were equated on gender, race/ethnic identity, age, educational background, and family history of alcoholism...
January 8, 2018: Alcohol
https://www.readbyqxmd.com/read/29777681/electrochemical-enzymatic-fenitrothion-sensor-based-on-a-tyrosinase-poly-2-hydroxybenzamide-modified-graphite-electrode
#11
Maria de Fátima Alves, Ricardo Augusto Moreira de Souza Corrêa, Filipe Soares da Cruz, Diego Leoni Franco, Lucas Franco Ferreira
This paper reports the electrosynthesis and characterisation of a polymeric film derived from 2-hydroxybenzamide over a graphite electrode and its application as an enzymatic biosensor for the determination and quantification of the pesticide fenitrothion. The material was analysed by scanning electron microscopy and its electrochemical properties characterised by cyclic voltammetry and electrochemical impedance spectroscopy. The enzyme tyrosinase was immobilised over the modified electrode by the drop and dry technique...
May 16, 2018: Analytical Biochemistry
https://www.readbyqxmd.com/read/29776810/congenital-heart-disease-in-adults-assessmentof-functional-capacity-using-cardiopulmonary-exercise-testing
#12
Sílvia Aguiar Rosa, Ana Agapito, Rui M Soares, Lídia Sousa, José Alberto Oliveira, Ana Abreu, Ana Sofia Silva, Sandra Alves, Helena Aidos, Fátima F Pinto, Rui Cruz Ferreira
AIM: The aim of the study was to compare functional capacity in different types of congenital heart disease (CHD), as assessed by cardiopulmonary exercise testing (CPET). METHODS: A retrospective analysis was performed of adult patients with CHD who had undergone CPET in a single tertiary center. Diagnoses were divided into repaired tetralogy of Fallot, transposition of the great arteries (TGA) after Senning or Mustard procedures or congenitally corrected TGA, complex defects, shunts, left heart valve disease and right ventricular outflow tract obstruction...
May 15, 2018: Portuguese Journal of Cardiology: An Official Journal of the Portuguese Society of Cardiology
https://www.readbyqxmd.com/read/29774850/mycobacterium-bovis-infection-of-red-fox-france
#13
Lorraine Michelet, Krystel De Cruz, Sylvie Hénault, Jennifer Tambosco, Céline Richomme, Édouard Réveillaud, Hélène Gares, Jean-Louis Moyen, María Laura Boschiroli
Mycobacterium bovis infection in wild red foxes was found in southern France, where livestock and other wildlife species are infected. Foxes frequently interact with cattle but have been underestimated as a reservoir of M. bovis. Our results suggest a possible role of the red fox in the epidemiology of bovine tuberculosis.
June 2018: Emerging Infectious Diseases
https://www.readbyqxmd.com/read/29774098/establishment-of-primary-cell-culture-and-an-intracranial-xenograft-model-of-pediatric-ependymoma-a-prospect-for-therapy-development-and-understanding-of-tumor-biology
#14
Lorena Favaro Pavon, Tatiana Tais Sibov, Silvia Regina Caminada de Toledo, Daniela Mara de Oliveira, Francisco Romero Cabral, Jean Gabriel de Souza, Pamela Boufleur, Luciana C Marti, Jackeline Moraes Malheiros, Edgar Ferreira da Cruz, Fernando F Paiva, Suzana M F Malheiros, Manoel A de Paiva Neto, Alberto Tannús, Sérgio Mascarenhas de Oliveira, Nasjla Saba Silva, Andrea Maria Cappellano, Antonio Sérgio Petrilli, Ana Marisa Chudzinski-Tavassi, Sérgio Cavalheiro
Background: Ependymoma (EPN), the third most common pediatric brain tumor, is a central nervous system (CNS) malignancy originating from the walls of the ventricular system. Surgical resection followed by radiation therapy has been the primary treatment for most pediatric intracranial EPNs. Despite numerous studies into the prognostic value of histological classification, the extent of surgical resection and adjuvant radiotherapy, there have been relatively few studies into the molecular and cellular biology of EPNs...
April 24, 2018: Oncotarget
https://www.readbyqxmd.com/read/29773562/neuroimaging-findings-of-zika-virus-associated-neurologic-complications-in-adults
#15
REVIEW
L C Hygino da Cruz, O J M Nascimento, F P P L Lopes, I R F da Silva
When the first suspected cases of neurologic disorders associated with the Zika virus were noticed in Brazil in late 2015, several studies had been conducted to understand the pathophysiology of the disease and its associated complications. In addition to its well-established association with microcephaly in neonates, the Zika virus infection has also been suggested to trigger other severe neurologic complications in adults, such as Guillain-Barré syndrome, radiculomyelitis, and meningoencephalitis. Hence, the Zika virus should be deemed a global threat that can cause devastating neurologic complications among individuals in all age ranges...
May 17, 2018: AJNR. American Journal of Neuroradiology
https://www.readbyqxmd.com/read/29770449/effects-of-a-nanoemulsion-with-copaifera-officinalis-oleoresin-against-monogenean-parasites-of-colossoma-macropomum-a-neotropical-serrasalmidae
#16
D S S Valentim, J L Duarte, A E M F M Oliveira, R A S Cruz, J C T Carvalho, C Solans, C P Fernandes, M Tavares-Dias
Monogeneans are ectoparasites that may cause losses in production and productivity in the aquaculture of Colossoma macropomum. Chemotherapeutics used in aquaculture usually have major adverse effects on fish; hence, the use of essential oils has been considered advantageous, but these are not soluble in water. Thus, the use of nanostructures to enhance water solubility of compounds and improve bioactivity may be very promising. This study investigated the antiparasitic activity of nanoemulsion prepared with Copaifera officinalis oleoresin (50, 100, 150, 200 and 300 mg/L), against monogenean parasites from the gills of C...
May 16, 2018: Journal of Fish Diseases
https://www.readbyqxmd.com/read/29768277/the-brief-sexual-symptom-checklist-as-a-screening-tool-for-sex-related-problems-in-the-primary-care-setting-focus-on-erectile-dysfunction
#17
Javier Romero Otero, Borja García Gómez, José Medina Polo, Esther García Rojo, Eduardo García Cruz, Francois Peinado, Raquel Sopeña Sutil, Giorgio Bozzini, Alfredo Rodríguez Antolín
PURPOSE: To assess the performance of the Brief Sexual Symptom Checklist for men (BSSC-M) questionnaire in General Practitioner's (GP) consults in Spain. METHODS: Multicenter, cross-sectional study conducted in Spain among men ≥50 years, visiting a GP for any reason, and being able to answer self-administered questionnaires. Patients receiving medicines for erectile dysfunction (ED) and those with poor functional status were excluded. Sexual satisfaction was assessed by the BSSC-M, ED by the Sexual Health Inventory for Men (SHIM), and quality of life (QoL) using a 5-point Likert scale...
May 16, 2018: Urologia Internationalis
https://www.readbyqxmd.com/read/29766601/functional-high-intensity-exercise-training-ameliorates-insulin-resistance-and-cardiometabolic-risk-factors-in-type-2-diabetes
#18
Ciarán E Fealy, Stephan Nieuwoudt, Julie A Foucher, Amanda R Scelsi, Steve K Malin, Mangesh Pagadala, Lauren A Cruz, Miranda Li, Michael Rocco, Bartolome Burguera, John P Kirwan
AIM: Functional high intensity training (F-HIT) is a novel fitness paradigm that integrates simultaneous aerobic and resistance training in sets of constantly varied movements, based on real-world situational exercises, performed at high intensity in workouts that range from ∼8-20 min/session. We hypothesized that F-HIT would be an effective exercise mode for reducing insulin resistance in type 2 diabetes (T2D). METHODS: We recruited 13 overweight/obese adults (5 males, 8 females; 53 ± 7 years; BMI 34...
May 15, 2018: Experimental Physiology
https://www.readbyqxmd.com/read/29766299/molecularly-defined-diffuse-leptomeningeal-glioneuronal-tumor-dlgnt-comprises-two-subgroups-with-distinct-clinical-and-genetic-features
#19
Maximilian Y Deng, Martin Sill, Jason Chiang, Jens Schittenhelm, Martin Ebinger, Martin U Schuhmann, Camelia-Maria Monoranu, Till Milde, Andrea Wittmann, Christian Hartmann, Clemens Sommer, Werner Paulus, Jutta Gärtner, Wolfgang Brück, Thomas Rüdiger, Alfred Leipold, Zane Jaunmuktane, Sebastian Brandner, Felice Giangaspero, Paolo Nozza, Jaume Mora, Andres Morales la Madrid, Ofelia Cruz Martinez, Jordan R Hansford, Torsten Pietsch, Anna Tietze, Pablo Hernáiz-Driever, Iris Stoler, David Capper, Andrey Korshunov, David W Ellison, Andreas von Deimling, Stefan M Pfister, Felix Sahm, David T W Jones
Diffuse leptomeningeal glioneuronal tumors (DLGNT) represent rare CNS neoplasms which have been included in the 2016 update of the WHO classification. The wide spectrum of histopathological and radiological features can make this enigmatic tumor entity difficult to diagnose. In recent years, large-scale genomic and epigenomic analyses have afforded insight into key genetic alterations occurring in multiple types of brain tumors and provide unbiased, complementary tools to improve diagnostic accuracy. Through genome-wide DNA methylation screening of > 25,000 tumors, we discovered a molecularly distinct class comprising 30 tumors, mostly diagnosed histologically as DLGNTs...
May 15, 2018: Acta Neuropathologica
https://www.readbyqxmd.com/read/29765330/glial-cells-are-involved-in-ang-ii-induced-vasopressin-release-and-sodium-intake-in-awake-rats
#20
Atalia F L Flôr, José L de Brito Alves, Maria S França-Silva, Camille M Balarini, Lucila L K Elias, Silvia G Ruginsk, José Antunes-Rodrigues, Valdir A Braga, Josiane C Cruz
It is known that circulating angiotensin II (ANG-II) acts on the circumventricular organs (CVOs), which partially lack a normal blood-brain barrier, to stimulate pressor responses, vasopressin (AVP), and oxytocin (OT) secretion, as well as sodium and water intake. Although ANG-II type 1 receptors (AT1R ) are expressed in neurons and astrocytes, the involvement of CVOs glial cells in the neuroendocrine, cardiovascular and behavioral responses induced by central ANG II remains to be further elucidated. To address this question, we performed a set of experiments combining in vitro studies in primary hypothalamic astrocyte cells (HACc) and in vivo intracerebroventricular (icv) microinjections into the lateral ventricle of awake rats...
2018: Frontiers in Physiology
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