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https://www.readbyqxmd.com/read/28209893/localized-aliphatic-organic-material-on-the-surface-of-ceres
#1
M C De Sanctis, E Ammannito, H Y McSween, A Raponi, S Marchi, F Capaccioni, M T Capria, F G Carrozzo, M Ciarniello, S Fonte, M Formisano, A Frigeri, M Giardino, A Longobardo, G Magni, L A McFadden, E Palomba, C M Pieters, F Tosi, F Zambon, C A Raymond, C T Russell
Organic compounds occur in some chondritic meteorites, and their signatures on solar system bodies have been sought for decades. Spectral signatures of organics have not been unambiguously identified on the surfaces of asteroids, whereas they have been detected on cometary nuclei. Data returned by the Visible and InfraRed Mapping Spectrometer on board the Dawn spacecraft show a clear detection of an organic absorption feature at 3.4 micrometers on dwarf planet Ceres. This signature is characteristic of aliphatic organic matter and is mainly localized on a broad region of ~1000 square kilometers close to the ~50-kilometer Ernutet crater...
February 17, 2017: Science
https://www.readbyqxmd.com/read/28202093/tuberculosis-and-risk-of-acute-myocardial-infarction-a-propensity-score-matched-analysis
#2
M A Huaman, R J Kryscio, C J Fichtenbaum, D Henson, E Salt, T R Sterling, B A Garvy
Several pathogens have been associated with increased cardiovascular disease (CVD) risk. Whether this occurs with Mycobacterium tuberculosis infection is unclear. We assessed if tuberculosis disease increased the risk of acute myocardial infarction (AMI). We identified patients with tuberculosis index claims from a large de-identified database of ~15 million adults enrolled in a U.S. commercial insurance policy between 2008 and 2010. Tuberculosis patients were 1:1 matched to patients without tuberculosis claims using propensity scores...
February 16, 2017: Epidemiology and Infection
https://www.readbyqxmd.com/read/28183617/physical-chemical-and-antimicrobial-evaluation-of-a-composite-material-containing-quaternary-ammonium-salt-for-braces-cementation
#3
Mari Miura Sugii, Fábio Augusto de Souza Ferreira, Karina Cogo Müller, Debora Alves Nunes Leite Lima, Francisco Carlos Groppo, Hidetake Imasato, Ubirajara Pereira Rodrigues-Filho, Flávio Henrique Baggio Aguiar
The antibiofilm effect of iodide quaternary ammonium methacryloxy silicate (IQAMS) in Transbond XT Light Cure Adhesive resin used for braces cementation was evaluated. Fourier Transform Infrared (FTIR) spectroscopy confirmed IQAMS formation and Scanning Electron Microscopy coupled to Energy-Dispersive X-ray Spectroscopy (SEM-EDS) revealed that as coating, the quaternary ammonium groups from IQAMS were homogeneously dispersed throughout the surface. When incorporated, the composite material presented homogeneous dispersion throughout the resin...
April 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28177256/synthesis-structure-and-magnetic-electrochemical-properties-of-a-family-of-tungstoarsenates-containing-just-co-ii-centers-or-both-co-ii-and-fe-iii-centers
#4
Charyle S Ayingone Mezui, Pedro de Oliveira, Anne-Lucie Teillout, Jérôme Marrot, Patrick Berthet, Mounim Lebrini, Israël M Mbomekallé
The three polyoxotungstates [(NaOH2)2Co(II)2(As2W15O56)2](18-) (1), [(NaOH2)(Co(II)OH2)Co(II)2(As2W15O56)2](17-) (2), and [(Co(II)OH2)2Co(II)2(As2W15O56)2](16-) (3) have been prepared in aqueous solution upon mixing cobalt(II) salts with the ligand [As2W15O56](12-). The reaction of 1 or 2 with the Fe(3+) ion leads invariably to the same species [(Fe(III)OH2)(Co(II)OH2)Co(II)2(As2W15O56)2](15-) (4) possessing three cobalt atoms and a single iron atom. However, if the Fe-containing homologue of compound 1, that is, the polyoxotungstate [(NaOH2)2Fe(III)2(As2W15O56)2](16-) (5), is employed instead to react with the Co(2+) ion, the species [(Co(II)OH2)2Fe(III)2(As2W15O56)2](14-) (6) is obtained, having two cobalt atoms and two iron atoms...
February 8, 2017: Inorganic Chemistry
https://www.readbyqxmd.com/read/28176661/cold-shock-protein-a-from-corynebacterium-pseudotuberculosis-role-of-electrostatic-forces-in-the-stability-of-the-secondary-structure
#5
Monika A Coronado, Icaro P Caruso, Vinícius M De Oliveira, Vinícius G Contessoto, Vitor B P Leite, 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...
7, 2017: Protein and Peptide Letters
https://www.readbyqxmd.com/read/28174242/diversity-of-fate-outcomes-in-cell-pairs-under-lateral-inhibition
#6
Nara Guisoni, Rosa Martinez-Corral, Jordi Garcia Ojalvo, Joaquín de Navascués
Cell fate determination by lateral inhibition via Notch/Delta signalling has been extensively studied. Most formalised models consider Notch/Delta interactions in fields of cells, with parameters that typically lead to symmetry breaking of signalling states between neighbouring cells, commonly resulting in salt-and-pepper fate patterns. Here we consider the case of signalling between isolated cell pairs, and find that the bifurcation properties of a standard mathematical model of lateral inhibition can lead to stable symmetric signalling states...
February 7, 2017: Development
https://www.readbyqxmd.com/read/28165384/early-taste-experiences-and-later-food-choices
#7
REVIEW
Valentina De Cosmi, Silvia Scaglioni, Carlo Agostoni
BACKGROUND: Nutrition in early life is increasingly considered to be an important factor influencing later health. Food preferences are formed in infancy, are tracked into childhood and beyond, and complementary feeding practices are crucial to prevent obesity later in life. METHODS: Through a literature search strategy, we have investigated the role of breastfeeding, of complementary feeding, and the parental and sociocultural factors which contribute to set food preferences early in life...
February 4, 2017: Nutrients
https://www.readbyqxmd.com/read/28165059/combined-analysis-of-mrna-and-mirna-identifies-dehydration-and-salinity-responsive-key-molecular-players-in-citrus-roots
#8
Rangjin Xie, Jin Zhang, Yanyan Ma, Xiaoting Pan, Cuicui Dong, Shaoping Pang, Shaolan He, Lie Deng, Shilai Yi, Yongqiang Zheng, Qiang Lv
Citrus is one of the most economically important fruit crops around world. Drought and salinity stresses adversely affected its productivity and fruit quality. However, the genetic regulatory networks and signaling pathways involved in drought and salinity remain to be elucidated. With RNA-seq and sRNA-seq, an integrative analysis of miRNA and mRNA expression profiling and their regulatory networks were conducted using citrus roots subjected to dehydration and salt treatment. Differentially expressed (DE) mRNA and miRNA profiles were obtained according to fold change analysis and the relationships between miRNAs and target mRNAs were found to be coherent and incoherent in the regulatory networks...
February 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28161392/-recommendations-for-the-diagnosis-and-treatment-of-classic-forms-of-21-hydroxylase-deficient-congenital-adrenal-hyperplasia
#9
Amparo Rodríguez, Begoña Ezquieta, José Igancio Labarta, María Clemente, Rafael Espino, Amaia Rodriguez, Aranzazu Escribano
Congenital adrenal hyperplasia due to 21-hydroxylase deficiency is an autosomal recessive disorder caused by mutations in the CYP21A2 gene. Cortisol and aldosterone synthesis are impaired in the classic forms (adrenal insufficiency and salt-wasting crisis). Females affected are virilised at birth, and are at risk for genital ambiguity. In this article we give recommendations for an early as possible diagnosis and an appropriate and individualised treatment. A patient and family genetic study is essential for the diagnosis of the patient, and allows genetic counselling, as well as a prenatal diagnosis and treatment for future pregnancy...
February 1, 2017: Anales de Pediatría: Publicación Oficial de la Asociación Española de Pediatría (A.E.P.)
https://www.readbyqxmd.com/read/28160663/non-invasive-ultrasonic-technology-for-continuous-monitoring-of-pork-loin-and-ham-dry-salting
#10
Marta de Prados, Jose V Garcia-Perez, Jose Benedito
Online ultrasound measurements were taken using pulse-echo mode in loins (Longissimus dorsi) and hams at different salting times (up to 30days). From the time-domain ultrasonic wave, the time of flight (TOF) was computed as well as its variation between two signals (ΔTOF). A progressive decrease in TOF during dry salting was found, which was linked to the salt gain, water loss and the reduction in sample thickness. Predictive models based on the ultrasonic parameters (ΔTOF and initial time of flight, TOF0) correctly classified 85% of the loins and 90% of the hams into 3 groups of salt content (low/medium/high)...
January 18, 2017: Meat Science
https://www.readbyqxmd.com/read/28158828/integrative-control-between-proton-pumps-and-sos1-antiporters-in-roots-is-crucial-for-maintaining-low-na-accumulation-and-salt-tolerance-in-ammonium-supplied-sorghum-bicolor
#11
Rafael de Souza Miranda, Rosilene Oliveira Mesquita, José Hélio Costa, Juan Carlos Alvarez-Pizarro, José Tarquinio Prisco, Enéas Gomes-Filho
No abstract text is available yet for this article.
January 31, 2017: Plant & Cell Physiology
https://www.readbyqxmd.com/read/28158318/the-first-complete-chloroplast-genome-sequences-of-ulmus-species-by-de-novo-sequencing-genome-comparative-and-taxonomic-position-analysis
#12
Li-Hui Zuo, Ai-Qin Shang, Shuang Zhang, Xiao-Yue Yu, Ya-Chao Ren, Min-Sheng Yang, Jin-Mao Wang
Elm (Ulmus) has a long history of use as a high-quality heavy hardwood famous for its resistance to drought, cold, and salt. It grows in temperate, warm temperate, and subtropical regions. This is the first report of Ulmaceae chloroplast genomes by de novo sequencing. The Ulmus chloroplast genomes exhibited a typical quadripartite structure with two single-copy regions (long single copy [LSC] and short single copy [SSC] sections) separated by a pair of inverted repeats (IRs). The lengths of the chloroplast genomes from five Ulmus ranged from 158,953 to 159,453 bp, with the largest observed in Ulmus davidiana and the smallest in Ulmus laciniata...
2017: PloS One
https://www.readbyqxmd.com/read/28135109/desulfinylation-of-ag-i-sulfinyl-mesoionic-carbenes-preparation-of-c-unsubstituted-au-i-1-2-3-triazole-carbene-complexes
#13
María Frutos, Manuel A Ortuño, Agustí Lledos, Alma Viso, Roberto Fernández de la Pradilla, María C de la Torre, Miguel A Sierra, Heinz Gornitzka, Catherine Hemmert
New and well-characterized Ag-bis(1,2,3-triazolylidene) complexes having enantiopure (S)-sulfoxides upon sequential treatment with alcohols and Au(I) form separable mixtures of regioisomeric C-unsubstituted Au-1,2,3-triazolylidene complexes. Mechanistic studies and DFT calculations support a desulfinylation process for in situ generated free triazolylidene salts.
January 30, 2017: Organic Letters
https://www.readbyqxmd.com/read/28129772/effect-of-a-short-course-of-iron-polymaltose-on-acquisition-of-malarial-parasitaemia-in-anaemic-indonesian-schoolchildren-a-randomized-trial
#14
Margaretta A Prasetyani, Quirijn de Mast, Robel Afeworki, Maria M M Kaisar, Difa Stefanie, Erliyani Sartono, Taniawati Supali, André J van der Ven
BACKGROUND: Concern exists about the safety of iron supplementation given to individuals in malarious areas. The possible unfavourable impact of iron supplementation on malaria might be less when slow-release iron compounds are used instead of ferrous salts, because no toxic non-transferrin bound iron is formed. The aim of this study was to determine the effect of iron supplementation using the slow-release iron compound iron polymaltose (IPM) on the acquisition of malarial parasitaemia...
January 28, 2017: Malaria Journal
https://www.readbyqxmd.com/read/28127614/microfluidic-pumping-by-micromolar-salt-concentrations
#15
Ran Niu, Patrick Kreissl, Aidan T Brown, Georg Rempfer, Denis Botin, Christian Holm, Thomas Palberg, Joost de Graaf
An ion-exchange-resin-based microfluidic pump is introduced that utilizes trace amounts of ions to generate fluid flows. We show experimentally that our pump operates in almost deionized water for periods exceeding 24 h and induces fluid flows of μm s(-1) over hundreds of μm. This flow displays a far-field, power-law decay which is characteristic of two-dimensional (2D) flow when the system is strongly confined and of three-dimensional (3D) flow when it is not. Using theory and numerical calculations we demonstrate that our observations are consistent with electroosmotic pumping driven by μmol L(-1) ion concentrations in the sample cell that serve as 'fuel' to the pump...
January 27, 2017: Soft Matter
https://www.readbyqxmd.com/read/28125773/a-facile-route-to-quadruply-annulated-borepins
#16
Kai Schickedanz, Julian Radtke, Michael Bolte, Hans-Wolfram Lerner, Matthias Wagner
A two-step synthesis sequence furnishes quadruply annulated borepins in high yields. The first step involves a nucleophilic substitution reaction between Aryl-BF3K salts (Aryl = mesityl, phenyl) and lithiated bromonapthalene derivatives LiNaph(Br,R) (HNaph(Br,R) = 8-bromonaphthalene (a), 5-bromoacenaphthene (b), 5-bromoacenaphthylene (c)). In the second step, the resulting heteroleptic triarylboranes Aryl-B(Naph(Br,R))2 (3a-3c) are subjected to an intramolecular Ni-mediated Yamamoto reaction to close the seven-membered rings and create the borepins 4a-4c...
January 26, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28121059/intercalation-into-a-prussian-blue-derivative-from-solutions-containing-two-species-of-cations
#17
Collins Erinmwingbovo, Maria Sofia Palagonia, Doriano Brogioli, Fabio La Mantia
Reversible mixed ion intercalation in non-selective host structures has promising applications in desalination, in mixed-ion batteries, in waste-water treatment and in lithium recovery by electrochemical ion pumping. One class of host compound that possesses many of the requirements needed for such applications (cost effectiveness, fast ion kinetics and stability in aqueous medium) includes the Prussian blue derivatives. Here, we study the fundamental process of intercalation of multiple cations at the thermodynamic level, by means of galvanostatic cycling...
January 25, 2017: Chemphyschem: a European Journal of Chemical Physics and Physical Chemistry
https://www.readbyqxmd.com/read/28120885/-blue-carbon-and-nutrient-stocks-of-salt-marshes-at-a-temperate-coastal-lagoon-ria-de-aveiro-portugal
#18
Ana I Sousa, Danielle B Santos, Eduardo Ferreira da Silva, Lisa P Sousa, Daniel F R Cleary, Amadeu M V M Soares, Ana I Lillebø
Ria de Aveiro is a mesotidal coastal lagoon with one of the largest continuous salt marshes in Europe. The objective of this work was to assess C, N and P stocks of Spartina maritima (low marsh pioneer halophyte) and Juncus maritimus (representative of mid-high marsh halophytes) combined with the contribution of Halimione portulacoides, Sarcocornia perennis, and Bolbochenous maritimus to the lagoon ≈4400 ha marsh area. A multivariate analysis (PCO), taking into account environmental variables and the annual biomass and nutrient dynamics, showed that there are no clear seasonal or spatial differences within low or mid-high marshes, but clearly separates J...
January 25, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28119974/crystalline-structure-and-thermotropic-behavior-of-alkyltrimethylphosphonium-amphiphiles
#19
Ana Gamarra, Lourdes Urpí, Antxon Martínez de Ilarduya, Sebastián Muñoz-Guerra
Quaternary organophosphonium salts bearing long alkyl chains are cationic surfactants of interest owing to their physical and biological properties. In the present work, the crystal structure and thermotropic behavior of the homologous series of alkyltrimethylphosphonium bromides (nATMP·Br), with the alkyl chain containing an even number (n) of carbon atoms from 12 to 22, have been examined within the 0-300 °C range of temperatures. These compounds were shown to be resistant to heat up to ∼390 °C. The phases adopted at different temperatures were detected by DSC, and the structural changes involved in the phase transitions have been characterized by simultaneous WAXS and SAXS carried out in real-time, and by polarizing optical microscopy as well...
January 25, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28109662/reutilization-of-waste-scrap-tyre-as-the-immobilization-matrix-for-the-enhanced-bioremoval-of-a-monoaromatic-hydrocarbons-methyl-tert-butyl-ether-and-chlorinated-ethenes-mixture-from-water
#20
Qihong Lu, Renata Alves de Toledo, Fei Xie, Junhui Li, Hojae Shim
BTEX (benzene, toluene, ethylbenzene, ortho-, meta-, and para-xylenes), methyl tert-butyl ether (MTBE), cis-1,2-dichloroethylene (cis-DCE), and trichloroethylene (TCE) are among the major soil and groundwater contaminants frequently co-existing, as a result of their widespread uses. Pseudomonas plecoglossicida was immobilized on waste scrap tyre to remove these contaminants mixture from synthetic contaminated water. The microbial activity was enhanced in the immobilized system, shown by the higher colony forming units (CFUs) (40%), while BTEX were used as growth substrates...
January 18, 2017: Science of the Total Environment
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