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https://www.readbyqxmd.com/read/29232385/sustaining-visceral-leishmaniasis-elimination-in-bangladesh-could-a-policy-brief-help
#1
Alyssa Fitzpatrick, Noor Saad M S Al-Kobaisi, Jessica Beitman Maya, Yu Ren Chung, Satyender Duhan, Erdene Elbegdorj, Sushant Jain, Edward Kuhn, Alexandra Nastase, Be-Nazir Ahmed, Piero Olliaro
Bangladesh has made significant progress towards elimination of visceral leishmaniasis, and is on track to achieve its target of less than one case per 10,000 inhabitants in each subdistrict in 2017. As the incidence of disease falls, it is likely that the political capital and financial resources dedicated towards the elimination of visceral leishmaniasis may decrease, raising the prospect of disease resurgence. Policy memos may play a crucial role during the transition of the elimination plan from the 'attack' to the 'consolidation' and 'maintenance' phases, highlighting key stakeholders and areas where ongoing investment is crucial...
December 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/29231788/the-2018-inter-agency-field-manual-on-reproductive-health-in-humanitarian-settings-revising-the-global-standards
#2
Angel M Foster, Dabney P Evans, Melissa Garcia, Sarah Knaster, Sandra Krause, Therese McGinn, Sarah Rich, Meera Shah, Hannah Tappis, Erin Wheeler
Since the 1990s, the Inter-agency field manual on reproductive health in humanitarian settings (IAFM) has provided authoritative guidance on reproductive health service provision during different phases of complex humanitarian emergencies. In 2018, the Inter-Agency Working Group on Reproductive Health in Crises will release a new edition of this global resource. In this article, we describe the collaborative and inter-sectoral revision process and highlight major changes in the 2018 IAFM. Key revisions to the manual include repositioning unintended pregnancy prevention within and explicitly incorporating safe abortion care into the Minimum Initial Service Package (MISP) chapter, which outlines a set of priority activities to be implemented at the outset of a humanitarian crisis; stronger guidance on the transition from the MISP to comprehensive sexual and reproductive health services; and the addition of a logistics chapter...
December 12, 2017: Reproductive Health Matters
https://www.readbyqxmd.com/read/29231183/metamaterials-based-on-the-phase-transition-of-vo2
#3
Hongwei Liu, Junpeng Lu, Xiao Renshaw Wang
In this article, we present a comprehensive review on recent research progress in design and fabrication of active tunable metamaterials and devices based on phase transition of VO2. Firstly, we introduce mechanisms of the metal-to-insulator phase transition (MIPT) in VO2 investigated by ultrafast THz spectroscopies. By analyzing the THz spectra, the evolutions of MIPT in VO2 induced by different external excitations are described. The superiorities of using VO2 as building blocks to construct highly tunable metamaterials are discussed...
December 12, 2017: Nanotechnology
https://www.readbyqxmd.com/read/29231178/internal-structure-and-swelling-behaviour-of-i-in-silico-i-microgel-particles
#4
Lorenzo Rovigatti, Nicoletta Gnan, Emanuela Zaccarelli
Microgels are soft colloids that, in virtue of their polymeric nature, can react to external stimuli such as temperature or pH by changing their size. The resulting swelling/deswelling transition can be exploited in fundamental research as well as for many diverse practical applications, ranging from art restoration to medicine. Such an extraordinary versatility stems from the complex internal structure of the individual microgels, each of which is a crosslinked polymer network. Here we employ a recently-introduced computational method to generate realistic microgel configurations and look at their structural properties, both in real and Fourier space, for several temperatures across the volume phase transition as a function of the crosslinker concentration and of the confining radius employed during the ``in-silico'' synthesis...
December 12, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/29230607/the-effect-of-high-count-rates-on-cardiac-perfusion-quantification-in-a-simultaneous-pet-mr-system-using-a-cardiac-perfusion-phantom
#5
Jim O' Doherty, Zacharias Chalampalakis, Paul Schleyer, Muhummad Sohaib Nazir, Amedeo Chiribiri, Paul K Marsden
BACKGROUND: PET-MRI is under investigation as a new strategy for quantitative myocardial perfusion imaging. Consideration is required as to the maximum scanner count rate in order to limit dead-time losses resulting from administered activity in the scanner field of view during the first pass of the radiotracer. RESULTS: We performed a decaying-source experiment to investigate the high count-rate performance of a PET-MR system (Siemens mMR) over the expected range of activities during a clinical study...
December 11, 2017: EJNMMI Physics
https://www.readbyqxmd.com/read/29230051/integration-of-grid-maps-in-merged-environments
#6
Tanja Wernle, Torgeir Waaga, Maria Mørreaunet, Alessandro Treves, May-Britt Moser, Edvard I Moser
Natural environments are represented by local maps of grid cells and place cells that are stitched together. The manner by which transitions between map fragments are generated is unknown. We recorded grid cells while rats were trained in two rectangular compartments, A and B (each 1 m × 2 m), separated by a wall. Once distinct grid maps were established in each environment, we removed the partition and allowed the rat to explore the merged environment (2 m × 2 m). The grid patterns were largely retained along the distal walls of the box...
December 11, 2017: Nature Neuroscience
https://www.readbyqxmd.com/read/29230031/two-dimensional-topological-superconductivity-in-pb-co-si-111
#7
Gerbold C Ménard, Sébastien Guissart, Christophe Brun, Raphaël T Leriche, Mircea Trif, François Debontridder, Dominique Demaille, Dimitri Roditchev, Pascal Simon, Tristan Cren
Just like insulators can present topological phases characterized by Dirac edge states, superconductors can exhibit topological phases characterized by Majorana edge states. In particular, one-dimensional topological superconductors are predicted to host zero-energy Majorana fermions at their extremities. By contrast, two-dimensional superconductors have a one-dimensional boundary which would naturally lead to propagating Majorana edge states characterized by a Dirac-like dispersion. In this paper we present evidences of one-dimensional dispersive in-gap edge states surrounding a two-dimensional topological superconducting domain consisting of a monolayer of Pb covering magnetic Co-Si islands grown on Si(111)...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29229951/a-new-high-pressure-form-of-mg2sio4-highlighting-diffusionless-phase-transitions-of-olivine
#8
Naotaka Tomioka, Takuo Okuchi
High-pressure polymorphism of olivine (α-phase of Mg2SiO4) is of particular interest for geophysicists aiming to understand the structure and dynamics of the Earth's interior because of olivine's prominent abundance in the upper mantle. Therefore, natural and synthetic olivine polymorphs have been actively studied in the past half century. Here, we report a new high-pressure polymorph, the ε*-phase, which was discovered in a heavily shocked meteorite. It occurs as nanoscale lamellae and has a topotaxial relationship with the host ringwoodite (γ-phase of Mg2SiO4)...
December 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29229914/magnetostriction-polarization-coupling-in-multiferroic-mn2mnwo6
#9
Man-Rong Li, Emma E McCabe, Peter W Stephens, Mark Croft, Liam Collins, Sergei V Kalinin, Zheng Deng, Maria Retuerto, Arnab Sen Gupta, Haricharan Padmanabhan, Venkatraman Gopalan, Christoph P Grams, Joachim Hemberger, Fabio Orlandi, Pascal Manuel, Wen-Min Li, Chang-Qing Jin, David Walker, Martha Greenblatt
Double corundum-related polar magnets are promising materials for multiferroic and magnetoelectric applications in spintronics. However, their design and synthesis is a challenge, and magnetoelectric coupling has only been observed in Ni3TeO6 among the known double corundum compounds to date. Here we address the high-pressure synthesis of a new polar and antiferromagnetic corundum derivative Mn2MnWO6, which adopts the Ni3TeO6-type structure with low temperature first-order field-induced metamagnetic phase transitions (T N = 58 K) and high spontaneous polarization (~ 63...
December 11, 2017: Nature Communications
https://www.readbyqxmd.com/read/29229785/the-chemokine-receptor-cx3cr1-coordinates-monocyte-recruitment-and-endothelial-regeneration-after-arterial-injury
#10
Tobias Getzin, Kashyap Krishnasamy, Jaba Gamrekelashvili, Tamar Kapanadze, Anne Limbourg, Christine Häger, L Christian Napp, Johann Bauersachs, Hermann Haller, Florian P Limbourg
Regeneration of arterial endothelium after injury is critical for the maintenance of normal blood flow, cell trafficking, and vascular function. Using mouse models of carotid injury, we show that the transition from a static to a dynamic phase of endothelial regeneration is marked by a strong increase in endothelial proliferation, which is accompanied by induction of the chemokine CX3CL1 in endothelial cells near the wound edge, leading to progressive recruitment of Ly6Clo monocytes expressing high levels of the cognate CX3CR1 chemokine receptor...
December 11, 2017: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/29229650/improving-contraceptive-access-use-and-method-mix-by-task-sharing-implanon-insertion-to-frontline-health-workers-the-experience-of-the-integrated-family-health-program-in-ethiopia
#11
Yewondwossen Tilahun, Candace Lew, Bekele Belayihun, Kidest Lulu Hagos, Mengistu Asnake
In 2009, the Ethiopian Federal Ministry of Health launched an Implanon scale-up program with the goal of improving the availability of long-acting reversible contraceptive (LARC) methods at the community level. The Integrated Family Health Program (IFHP) supported the ministry to train Health Extension Workers (HEWs), a cadre of frontline health workers, on Implanon insertion. Prior to this task-sharing initiative, HEWs were only permitted to provide short-acting contraceptive methods; Implanon insertion services were only available at higher-level health facilities, such as health centers and above...
December 8, 2017: Global Health, Science and Practice
https://www.readbyqxmd.com/read/29228972/impact-of-prematurity-and-nutrition-on-the-developing-gut-microbiome-and-preterm-infant-growth
#12
Alex Grier, Xing Qiu, Sanjukta Bandyopadhyay, Jeanne Holden-Wiltse, Haeja A Kessler, Ann L Gill, Brooke Hamilton, Heidie Huyck, Sara Misra, Thomas J Mariani, Rita M Ryan, Lori Scholer, Kristin M Scheible, Yi-Horng Lee, Mary T Caserta, Gloria S Pryhuber, Steven R Gill
BACKGROUND: Identification of factors that influence the neonatal gut microbiome is urgently needed to guide clinical practices that support growth of healthy preterm infants. Here, we examined the influence of nutrition and common practices on the gut microbiota and growth in a cohort of preterm infants. RESULTS: With weekly gut microbiota samples spanning postmenstrual age (PMA) 24 to 46 weeks, we developed two models to test associations between the microbiota, nutrition and growth: a categorical model with three successive microbiota phases (P1, P2, and P3) and a model with two periods (early and late PMA) defined by microbiota composition and PMA, respectively...
December 11, 2017: Microbiome
https://www.readbyqxmd.com/read/29228798/charge-induced-geometrical-reorganization-of-dna-oligonucleotides-studied-by-tandem-mass-spectrometry-and-ion-mobility
#13
Stefanie Ickert, Johanna Hofmann, Jens Riedel, Sebastian Beck, Kevin Pagel, Michael W Linscheid
Mass spectrometry is applied as a tool for the elucidation of molecular structures. This premises that gas-phase structures reflect the original geometry of the analytes, while it requires a thorough understanding and investigation of the forces controlling and affecting the gas-phase structures. However, only little is known about conformational changes of oligonucleotides in the gas phase. In this study, a series of multiply charged DNA oligonucleotides (n = 15-40) has been subjected to a comprehensive tandem mass spectrometric study to unravel transitions between different ionic gas-phase structures...
January 1, 2017: European Journal of Mass Spectrometry
https://www.readbyqxmd.com/read/29228775/effects-of-ceramide-and-dihydroceramide-stereochemistry-at-c-3-on-the-phase-behavior-and-permeability-of-skin-lipid-membranes
#14
Andrej Kovacik, Petra Pullmannová, Jaroslav Maixner, Katerina Vavrova
Ceramides (Cer) are key components of the skin permeability barrier. Sphingosine-based CerNS and dihydrosphingosine-based CerNdS (dihydroCer) have two chiral centers; however, the importance of the correct stereochemistry in the skin barrier Cer is unknown. We investigated the role of the configuration at C-3 of CerNS and CerNdS in the organization and permeability of model skin lipid membranes. Unnatural L-threo-CerNS and L-threo-CerNdS with 24-C acyl chains were synthesized and, along with their natural D-erythro isomers, incorporated into membranes composed of major stratum corneum lipids (Cer, free fatty acids, cholesterol and cholesteryl sulfate)...
December 11, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/29228553/activation-of-nrf2-mediated-anti-oxidant-genes-by-antrodin-c-prevents-hyperglycemia-induced-senescence-and-apoptosis-in-human-endothelial-cells
#15
Kumar K J Senthil, Vani M Gokila, Sheng-Yang Wang
In the present study, we investigated the effects of antrodin C (ADC), a maleimide derivative isolated from mycelia of Antrodia cinnamomea, on high glucose (HG, 30 mM)-accelerated endothelial dysfunction in vitro. HG-induced cytotoxicity in human umbilical vein endothelial cells (HUVECs) was significantly ameliorated by ADC. In addition, treatment with ADC significantly prevented HG-induced senescence, growth arrest at the G1-S transition phase and apoptosis in HUVECs. Moreover, the increased level of intracellular reactive oxygen species (ROS) under HG condition was significantly ameliorated by ADC...
November 14, 2017: Oncotarget
https://www.readbyqxmd.com/read/29228469/simultaneous-determination-of-etonogestrel-and-ethinyl-estradiol-in-human-plasma-by-uplc-ms-ms-and-its-pharmacokinetic-study
#16
Sneha G Nair, Daxesh P Patel, Frank J Gonzalez, Bhargav M Patel, Puran Singhal, Darshan V Chaudhary
A selective, sensitive and rapid ultra-performance liquid chromatography tandem mass spectrometry method was developed and validated for the simultaneous determination of etonogestrel (ENG) and ethinyl estradiol (EE) in human plasma. The analytes and their deuterated internal standard, ENG-d7 and EE-d4 were extracted from plasma samples by solid phase extraction on HyperSep™ Retain PEP Cartridges. The chromatographic analysis was performed on ACQUITY UPLC HSS Cyano column, 100 A° (50 mm × 2.1 mm, 1.8 μm) column using gradient mobile phase, acetonitrile and 2...
December 11, 2017: Biomedical Chromatography: BMC
https://www.readbyqxmd.com/read/29228146/identification-and-characterization-of-a-specific-13-mirna-expression-signature-during-follicle-activation-in-the-zebrafish-ovary
#17
Queenie Wing-Lei Wong, Ming-An Sun, Shuk-Wa Lau, Chirag Parsania, Shaolong Zhou, Silin Zhong, Wei Ge
Ovarian folliculogenesis is always of great interest in reproductive biology. However, the molecular mechanisms that control follicle development, particularly the early phase of follicle activation or recruitment, still remain poorly understood. In an attempt to decipher the gene networks and signaling pathways involved in such transition, we conducted a transcriptomic analysis (RNA-seq) on zebrafish primary growth (PG, stage I; inactive) and pre-vitellogenic (PV, stage II; activated) follicles. A total of 118 unique microRNAs (miRNAs) (11 down-regulated and 83 up-regulated during PG/PV transition) and 56711 unique messenger RNAs (mRNAs) (1839 down-regulated and 7243 up-regulated during PG/PV transition) were identified...
December 6, 2017: Biology of Reproduction
https://www.readbyqxmd.com/read/29227956/different-%C3%AE-alanine-dimeric-forms-in-trifluoromethanesulfonic-acid-salts-xrd-and-vibrational-studies
#18
Łukasz Wołoszyn, Maria M Ilczyszyn
Two new crystalline salts: β-alaninium trifluoromethanesulfonate (β-AlaOTf) and bis(β-alanine) trifluoromethanesulfonate (β-2AlaOTf) were obtained. The former one contains diprotonated β-alanine dimer, the latter one monoprotonated β-alanine dimer. Both compounds were studied by single crystal XRD, vibrational (IR and Raman) spectroscopy and calorimetric method. The quantum-mechanical calculations (DFT/B3LYP/6-311++G(2d,2p)) for the diprotonated dimer were carried out. The β-AlaOTf salt crystallizes in the P1¯ space group of triclinic system (Z=2), the β-2AlaOTf in the P21/m space group of monoclinic system (Z=2)...
December 5, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/29227684/tas3-nanofibers-layered-trichalcogenide-for-high-performance-electronic-and-sensing-devices
#19
Carmen C Mayorga-Martínez, Zdenek Sofer, Jan Luxa, Stepan Huber, David Sedmidubsky, Petr Brázda, Lukas Palatinus, Martin Mikulics, Petr Lazar, Rostislav Medlín, Martin Pumera
The layered materials like transition metal dichalcogenides exhibit broad spectra of outstanding properties with huge application potential, while another group of related materials, layered transition metal trichalcogenides remains unexplored. Here we show a broad application potential of this interesting structural type of layered tantalum trisulfide prepared in a form of nanofibers. This material shows tailorable attractive electronic properties dependent on the tensile strain applied to it. Structure of this so-called orthorhombic phase of TaS3 grown in a form of long nanofibers has been solved and refined...
December 11, 2017: ACS Nano
https://www.readbyqxmd.com/read/29227679/thermally-tunable-pickering-emulsions-stabilized-by-carbon-dots-incorporated-core-shell-nanospheres-with-fluorescence-on-off-behavior
#20
Jianqiang Chen, Chenyang Zhu, Zhen Yang, Yiying Yue, Ping Wang, Takuya Kitaoka
Lack of deep understanding of nanoparticles (NPs) actions in oil/water interface set an obstacle to practical applications of Pickering emulsions. Fluorescence labels by incorporation of carbon dots (CDs) into poly(N-isopropylacrylamide) (PNIPAM) matrix can not only mark the action of PNIPAM-based NPs in the interface, but also reflect the colloidal morphologies of PNIPAM. In this work, we employed coaxial electrospraying for fabricating core-shell nanospheres of cellulose acetate encapsulated by PNIPAM and facile incorporation of CDs in PNIPAM shell was achieved simultaneously...
December 11, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
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