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https://www.readbyqxmd.com/read/28102824/investigation-of-valley-resolved-transmission-through-gate-defined-graphene-carrier-guiders
#1
Shimin Cao, Jiaojiao Zhou, Xuan Wei, Shu-Guang Cheng
Massless charge carriers in gate potential modulate graphene quantum well transport in a same way that electromagnetic wave propagates in optical fibers. Recent experiment by Kim {\it et al} (Nat. Phys. 12 1022) reports the valley symmetry preserved transport in graphene carrier guider. Based on a tight-binding model, the valley resolved transport coefficients are calculated with the method of scattering matrix theory. For a straight potential well, valley resolved conductance is quantized with value $2n+1$ multiply $2e^2/h$ with integer $n$...
January 19, 2017: Journal of Physics. Condensed Matter: An Institute of Physics Journal
https://www.readbyqxmd.com/read/28101256/build-the-future-of-science-communication-in-developing-countries-through-systematic-training-of-young-scientists
#2
Thomas K Karikari, Nat Ato Yawson, Emmanuel Quansah
No abstract text is available yet for this article.
December 2016: Journal of Microbiology & Biology Education: JMBE
https://www.readbyqxmd.com/read/28099885/oestrus-synchronisation-and-superovulation-alter-the-cervicovaginal-mucus-proteome-of-the-ewe
#3
Jessie W Maddison, Jessica P Rickard, Naomi C Bernecic, Guillaume Tsikis, Clement Soleilhavoup, Valerie Labas, Lucie Combes-Soia, Gregoire Harichaux, Xavier Druart, Tamara Leahy, Simon P de Graaf
: Although essential for artificial insemination (AI) and MOET (multiple ovulation and embryo transfer), oestrus synchronisation and superovulation are associated with increased female reproductive tract mucus production and altered sperm transport. The effects of such breeding practices on the ovine cervicovaginal (CV) mucus proteome have not been detailed. The aim of this study was to qualitatively and quantitatively investigate the Merino CV mucus proteome in naturally cycling (NAT) ewes at oestrus and mid-luteal phase, and quantitatively compare CV oestrus mucus proteomes of NAT, progesterone synchronised (P4) and superovulated (SOV) ewes...
January 15, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28077493/disease-modifying-therapies-modulate-retinal-atrophy-in-multiple-sclerosis-a-retrospective-study
#4
Julia Button, Omar Al-Louzi, Andrew Lang, Pavan Bhargava, Scott D Newsome, Teresa Frohman, Laura J Balcer, Elliot M Frohman, Jerry Prince, Peter A Calabresi, Shiv Saidha
OBJECTIVE: To retrospectively investigate whether disease-modifying therapies (DMTs) exert differential effects on rates of retinal atrophy in relapsing-remitting multiple sclerosis (RRMS), as assessed using optical coherence tomography (OCT). METHODS: A total of 402 patients with RRMS followed at the Johns Hopkins MS Center who underwent Cirrus-HD OCT were assessed for eligibility. Inclusion criteria included at least 1 year of OCT follow-up and adherence to a single DMT during the period of follow-up...
January 11, 2017: Neurology
https://www.readbyqxmd.com/read/28066877/central-noradrenaline-transporter-availability-in-highly-obese-non-depressed-individuals
#5
Swen Hesse, Georg-Alexander Becker, Michael Rullmann, Anke Bresch, Julia Luthardt, Mohammed K Hankir, Franziska Zientek, Georg Reißig, Marianne Patt, Katrin Arelin, Donald Lobsien, Ulrich Müller, S Baldofski, Philipp M Meyer, Matthias Blüher, Mathias Fasshauer, Wiebke K Fenske, Michael Stumvoll, Anja Hilbert, Yu-Shin Ding, Osama Sabri
PURPOSE: The brain noradrenaline (NA) system plays an important role in the central nervous control of energy balance and is thus implicated in the pathogenesis of obesity. The specific processes modulated by this neurotransmitter which lead to obesity and overeating are still a matter of debate. METHODS: We tested the hypothesis that in vivo NA transporter (NAT) availability is changed in obesity by using positron emission tomography (PET) and S,S-[(11)C]O-methylreboxetine (MRB) in twenty subjects comprising ten highly obese (body mass index BMI > 35 kg/m(2)), metabolically healthy, non-depressed individuals and ten non-obese (BMI < 30 kg/m(2)) healthy controls...
January 9, 2017: European Journal of Nuclear Medicine and Molecular Imaging
https://www.readbyqxmd.com/read/28060446/successful-treatment-of-donor-derived-hepatitis-c-viral-infection-in-three-transplant-recipients-from-a-donor-at-increased-risk-for-bloodborne-pathogens
#6
Ashesh P Shah, Andrew Cameron, Pooja Singh, Adam M Frank, Jonathan M Fenkel
We report here the successful treatment of hepatitis C virus (HCV) transmitted from a nucleic acid testing (NAT)-negative donor to 3 HCV-negative recipients - 2 renal transplants and 1 liver. Both renal recipients underwent standard deceased-donor renal transplantation with immediate graft function. The liver recipient underwent standard orthotopic liver transplantation and recovered uneventfully. The donor was a 39-year-old woman with a terminal serum creatinine of 0.7 mg/dL. She was high risk for bloodborne pathogens, based upon a history of sexual contact with an HCV-infected male partner...
January 6, 2017: Transplant Infectious Disease: An Official Journal of the Transplantation Society
https://www.readbyqxmd.com/read/28055036/preparation-and-implementation-of-optofluidic-neural-probes-for-in-vivo-wireless-pharmacology-and-optogenetics
#7
Jordan G McCall, Raza Qazi, Gunchul Shin, Shuo Li, Muhammad Hamza Ikram, Kyung-In Jang, Yuhao Liu, Ream Al-Hasani, Michael R Bruchas, Jae-Woong Jeong, John A Rogers
This Protocol Extension describes the fabrication and technical procedures for implementing ultrathin, flexible optofluidic neural probe systems that provide targeted, wireless delivery of fluids and light into the brains of awake, freely behaving animals. As a Protocol Extension article, this article describes an adaptation of an existing Protocol that offers additional applications. This protocol serves as an extension of an existing Nature Protocol describing optoelectronic devices for studying intact neural systems...
February 2017: Nature Protocols
https://www.readbyqxmd.com/read/28055034/applying-the-intact-method-to-purify-endosperm-nuclei-and-to-generate-parental-specific-epigenome-profiles
#8
Jordi Moreno-Romero, Juan Santos-González, Lars Hennig, Claudia Köhler
The early endosperm tissue of dicot species is very difficult to isolate by manual dissection. This protocol details how to apply the INTACT (isolation of nuclei tagged in specific cell types) system for isolating early endosperm nuclei of Arabidopsis at high purity and how to generate parental-specific epigenome profiles. As a Protocol Extension, this article describes an adaptation of an existing Nature Protocol that details the use of the INTACT method for purification of root nuclei. We address how to obtain the INTACT lines, generate the starting material and purify the nuclei...
February 2017: Nature Protocols
https://www.readbyqxmd.com/read/28050824/experimental-and-theoretical-methods-to-approach-the-study-of-vascular-patterning-in-the-plant-shoot
#9
Norma Fàbregas, Pau Formosa-Jordan, Marta Ibañes, Ana I Caño-Delgado
The plant vascular system provides transport and mechanical support functions that are essential for suitable plant growth and development. In Arabidopsis thaliana (Arabidopsis), the vascular tissues at the shoot inflorescence stems are disposed in organized vascular bundles. The vascular patterning emergence and development within the shoot inflorescence stems is under the control of plant growth regulators (De Rybel et al., Nat Rev Mol Cell Biol 17:30-40, 2016; Caño-Delgado et al., Annu Rev Cell Dev Biol 26:605-637, 2010)...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28050641/children-presenting-in-delayed-fashion-after-minor-head-trauma-with-scalp-swelling-do-they-require-further-workup
#10
Jonathan N Sellin, Amee Moreno, Sheila L Ryan, Sandi K Lam, Marcella Donaruma-Kwoh, Thomas G Luerssen, Andrew Jea
PURPOSE: It is common to evaluate children who have sustained minor head trauma with computed tomography (CT) of the head. Scalp swelling, in particular, has been associated with intracranial injury. A subset of patients, however, present in delayed fashion, often days after the head trauma, as soft tissue edema progresses and their caregiver notices scalp swelling. We explore the value of further workup in this setting. METHODS: We conducted a retrospective review of a prospectively collected cohort of children ≤24 months of age presenting to the Texas Children's Hospital with scalp swelling more than 24 h following a head trauma...
January 3, 2017: Child's Nervous System: ChNS: Official Journal of the International Society for Pediatric Neurosurgery
https://www.readbyqxmd.com/read/28041821/nat-positivity-in-seronegative-voluntary-blood-donors-from-western-india
#11
Kanchan K Mishra, Apeksha Trivedi, Sheetal Sosa, Krima Patel, Kanjaksha Ghosh
BACKGROUND AND OBJECTIVES: Prevalence and composition of Hepatitis B, Hepatitis C and HIV-1, NAT positive but seronegative voluntary blood donors from western part of India is yet to be documented. MATERIAL AND METHODS: Over last 2 1/2 years all the seronegative voluntary blood donors were tested using 10 minipools on a semiautomated NAT testing platform. The positively tested donors were followed up for at least five months for development of seropositivity. RESULTS: 79532 seronegative donations were tested by 10 minipool (MP) NAT leading to 51 positive sample (44 Hep B, 5 HIV 1 and Hep C positive)...
December 13, 2016: Transfusion and Apheresis Science
https://www.readbyqxmd.com/read/28040876/host-coexistence-in-a-model-for-two-host-one-parasitoid-interactions
#12
Valentina Clamer, Andrea Pugliese, Davide Liessi, Dimitri Breda
Building from a continuous-time host-parasitoid model introduced by Murdoch et al. (Am Nat 129:263-282, 1987), we study the dynamics of a 2 host-parasitoid model assuming, for the sake of simplicity, that larval stages have a fixed duration. If each host is subjected to density-dependent mortality in its larval stage, we obtain explicit conditions for the existence of an equilibrium where the two host species coexist with the parasitoid. However, if host demography is density-independent, equilibrium coexistence is impossible...
December 31, 2016: Journal of Mathematical Biology
https://www.readbyqxmd.com/read/28038408/computational-simulation-of-nat-uo2-232-tho2-and-u3o8-al-pills-to-estimate-p-fission-99-mo-yield-in-the-modeled-targets-irradiated-by-cyclone30-accelerator
#13
Atieh Jozvaziri, Zohreh Gholamzadeh, Kamran Yousefi, Seyed Mohammad Mirvakili, Masoomeh Alizadeh, Mohammadreza Aboudzadeh
(99)Mo is important for both therapy and imaging purposes. Accelerator and reactor-based procedures are applied to produce it. Newly proton-fission method has been taken in attention by some research centers. In the present work, computationally investigation of the (99)Mo yield in different fissionable targets irradiated by proton was aimed. The results showed UO2 pill target could be efficiently used to produce 11.12Ci/g-U saturation yield of (99)Mo using 25MeV proton irradiation of the optimized-dimension target with 70µA current...
November 23, 2016: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28036115/development-and-validation-of-a-real-time-reverse-transcriptase-pcr-assay-for-sensitive-detection-of-sftsv
#14
Peibin Zeng, Zhendong Yang, Sonia Bakkour, Bingjun Wang, Shuli Qing, Jingxing Wang, Limin Chen, Michael Busch, Hua Shan, Jing Liu, Tzong-Hae Lee
BACKGROUND: Severe fever with thrombocytopenia syndrome bunyavirus (SFTSV) is an emerging tick-borne RNA virus recently identified as the pathogen that causes severe fever with thrombocytopenia syndrome (SFTS) in China. The existing commercial nucleic acid testing (comNAT) assay with a relatively high claimed limit of quantitative detection (LOQD) is not capable of sensitive detection and quantitation of SFTSV. Thus, a new real-time reverse transcriptase (RT)-PCR assay with improved sensitivity is needed for clinical diagnosis; it could also be used to screen blood donors if necessary...
December 30, 2016: Journal of Medical Virology
https://www.readbyqxmd.com/read/28032753/thermodynamic-stability-of-bifeo3-0001-surfaces-from-ab-initio-theory
#15
Jian-Qing Dai, Jie-Wang Xu, Jian-Hui Zhu
The relative stability of multiferroic BiFeO3 (0001) surfaces, which is the (111) facet in the pseudocubic notation, with different stoichiometry is systematically studied by using ab-initio thermodynamic approach in order to obtain insights into the stable surface terminations. We predict that, under most chemical potential conditions, the thermodynamically favored terminations for the negative and positive surfaces are -Bi-O2 and -Fe-O3-Bi, respectively. The predicted difference in oxygen content between the negative and positive surfaces is consistent with experimental observations at the BiFeO3/metal interfaces [Nat...
December 29, 2016: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28025716/factors-contributing-to-delays-in-diagnosis-of-breast-cancers-in-ghana-west-africa
#16
Louise Brinton, Jonine Figueroa, Ernest Adjei, Daniel Ansong, Richard Biritwum, Lawrence Edusei, Kofi M Nyarko, Seth Wiafe, Joel Yarney, Beatrice Wiafe Addai, Baffour Awuah, Joe Nat Clegg-Lamptey
BACKGROUND: Late diagnoses and poor prognoses of breast cancer are common throughout Africa. METHODS: To identify responsible factors, we utilized data from a population-based case-control study involving 1184 women with breast malignancies conducted in three hospitals in Accra and Kumasi, Ghana. Interviews focused on potential breast cancer risk factors as well as factors that might contribute to presentation delays. We calculated odds ratios (OR) and 95% confidence intervals (CI) comparing malignances with biopsy masses larger than 5 cm...
December 26, 2016: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28013155/development-of-a-nickel-plated-aluminum-krypton-81m-target-system
#17
F Alrumayan, S M Okarvi, K Nagatsu, S Yanbawi, I Aljammaz
A fully automated system was developed to produce rubidium-81 ((81)Rb), based on the (nat)Kr (p, n) (81)Rb reaction. The energy incident on the target was 26MeV. Only 6MeV was stopped inside the gas and the remainder was stopped by a specially designed flange. The target body was characterized by its conical shape and its inner walls were chemically plated with 100±10µm of nickel (Ni). Ni is advantageous as a fairly good conductor of heat whose surface can resist solutions. Additionally, the Ni plated target allowed potassium chloride to dissolve (81)Rb, with no further effect on the target body...
December 13, 2016: Applied Radiation and Isotopes
https://www.readbyqxmd.com/read/28012709/the-history-and-challenges-of-blood-donor-screening-in-china
#18
REVIEW
Ling Li, Ka Yi Li, Ke Yan, Guojin Ou, Wenhui Li, Jue Wang, Ning Song, Li Tian, Xin Ji, Yongjun Chen, Xiaohua Liang, Zhong Liu, Yanyun Wu
Since the establishment of People's Republic of China in 1949, the Chinese government has encountered several catastrophes related to transfusion transmitted diseases. The government's increasing attention to blood safety has prompted the initiation of a series of policies and measures that have enhanced the level of safety for the blood supply and met the basic clinical demands of blood for 1.3 billion people in the country. Blood donation screening strategies in China predominantly comprise donor screening and donor testing...
November 12, 2016: Transfusion Medicine Reviews
https://www.readbyqxmd.com/read/28009189/temperature-induced-topological-phase-transitions-promoted-versus-suppressed-nontrivial-topology
#19
Gabriel Antonius, Steven G Louie
Contrary to previous two-band model studies which find increasing temperature would induce a topological phase transition, we show here through first-principles calculations that the opposite is also realizable, depending on the material's full band structure and symmetry of the electron-phonon coupling potential. This finding explains recent experimental results by Wojek et al. [Nat. Commun. 6, 8463 (2015)NCAOBW2041-172310.1038/ncomms9463]. We show that the topological phase diagram of BiTl(S_{1-δ}Se_{δ})_{2} as a function of doping and temperature contains two distinct regions with nontrivial topology...
December 9, 2016: Physical Review Letters
https://www.readbyqxmd.com/read/28007317/examining-the-role-of-follow-up-skeletal-surveys-in-non-accidental-trauma
#20
Rebecca D Powell-Doherty, Nora E Raynor, Donna A Goodenow, David G Jacobs, Anthony Stallion
BACKGROUND: Diagnosing NAT (non-accidental trauma) includes a skeletal survey to identify injuries. A follow-up survey is performed for missed injuries. This study examines the necessity of follow-up surveys. METHODS: The trauma database identified cases of suspected NAT in <4 years olds (2013-2014). Data were stratified by survey, age, injury, then analyzed for the prevalence of findings. All analyses (relative risk, prevalence and odds ratios) utilized RealStats Resource Pack (Trento, Italy)...
December 11, 2016: American Journal of Surgery
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