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https://www.readbyqxmd.com/read/27910825/monte-carlo-studies-on-water-and-lif-cavity-properties-for-dose-reporting-quantities-when-using-x-ray-and-brachytherapy-sources
#1
Isabela Soares Lopes Branco, Paula Cristina Guimarães Antunes, Gabriel Paiva Fonseca, Hélio Yoriyaz
Model-based dose calculation algorithms (MBDCAs) are the current tools to estimate dose in brachytherapy, which takes into account heterogeneous medium, therefore, departing from water-based formalism (TG-43). One aspect associated to MBCDA is the choice of dose specification medium since it offers two possibilities to report dose: (a) dose to medium in medium, D m,m; and (b) dose to water in medium, D w,m. The discussion about the preferable quantity to be reported is underway. The dose conversion factors, DCF, between dose to water in medium, D w,m, and dose to medium in medium, D m,m, is based on cavity theory and can be obtained using different approaches...
December 21, 2016: Physics in Medicine and Biology
https://www.readbyqxmd.com/read/27910581/spectral-survey-of-helium-lines-in-a-linear-plasma-device-for-use-in-helios-imaging
#2
H B Ray, T M Biewer, D T Fehling, R C Isler, E A Unterberg
Fast visible cameras and a filterscope are used to examine the visible light emission from Oak Ridge National Laboratory's Proto-MPEX. The filterscope has been configured to perform helium line ratio measurements using emission lines at 667.9, 728.1, and 706.5 nm. The measured lines should be mathematically inverted and the ratios compared to a collisional radiative model (CRM) to determine Te and ne. Increasing the number of measurement chords through the plasma improves the inversion calculation and subsequent Te and ne localization...
November 2016: Review of Scientific Instruments
https://www.readbyqxmd.com/read/27906905/description-of-13-infants-born-during-october-2015-january-2016-with-congenital-zika-virus-infection-without-microcephaly-at-birth-brazil
#3
Vanessa van der Linden, André Pessoa, William Dobyns, A James Barkovich, Hélio van der Linden Júnior, Epitacio Leite Rolim Filho, Erlane Marques Ribeiro, Mariana de Carvalho Leal, Pablo Picasso de Araújo Coimbra, Maria de Fátima Viana Vasco Aragão, Islane Verçosa, Camila Ventura, Regina Coeli Ramos, Danielle Di Cavalcanti Sousa Cruz, Marli Tenório Cordeiro, Vivian Maria Ribeiro Mota, Mary Dott, Christina Hillard, Cynthia A Moore
Congenital Zika virus infection can cause microcephaly and severe brain abnormalities (1). Congenital Zika syndrome comprises a spectrum of clinical features (2); however, as is the case with most newly recognized teratogens, the earliest documented clinical presentation is expected to be the most severe. Initial descriptions of the effects of in utero Zika virus infection centered prominently on the finding of congenital microcephaly (3). To assess the possibility of clinical presentations that do not include congenital microcephaly, a retrospective assessment of 13 infants from the Brazilian states of Pernambuco and Ceará with normal head size at birth and laboratory evidence of congenital Zika virus infection was conducted...
December 2, 2016: MMWR. Morbidity and Mortality Weekly Report
https://www.readbyqxmd.com/read/27902694/hospital-admission-and-criminality-associated-with-substance-misuse-in-young-refugees-a-swedish-national-cohort-study
#4
Hélio Manhica, Karl Gauffin, Ylva B Almqvist, Mikael Rostila, Anders Hjern
BACKGROUND: High rates of mental health problems have been described in young refugees, but few studies have been conducted on substance misuse. This study aimed to investigate the patterns of hospital care and criminality associated with substance misuse in refugees who settled in Sweden as teenagers. METHODS: Gender stratified Cox regression models were used to estimate the risks of criminal convictions and hospital care associated with substance misuse from national Swedish data for 2005-2012...
2016: PloS One
https://www.readbyqxmd.com/read/27901260/aliocha-dostoevski-s-death-during-an-epileptic-seizure
#5
Edson José Amâncio, Pedro André Kowacs, Bruno Toshio Takeshita, Fábio Augusto Nascimento, Hélio Afonso Ghizoni Teive
Mortality due to epilepsy is of great concern worldwide. Individuals with epilepsy have a two- or three-fold risk of death when compared to the general population. Based on biographical data and Anna Grigoriévna Dostoevskaia's memories, the authors concluded that a prolonged episode of status epilepticus was the culprit in the death of young Aliocha, youngest son of Fyodor Mikhailovich and Anna Dostoevski. At the time of Aliocha's death, very limited knowledge about epilepsy or therapeutic resources was available...
November 2016: Arquivos de Neuro-psiquiatria
https://www.readbyqxmd.com/read/27894151/value-of-the-ultrasound-in-the-study-of-ovarian-reserve-for-prediction-of-oocyte-recovery
#6
Meire Spressão, Antonio Hélio Oliani, Denise Cristina Mós Vaz Oliani
Purpose To identify which methods used in the assessment of the ovarian reserve are exclusive or complementary to identify the best response to follicle development. Methods Retrospective cohort study, involving patients undergoing assisted reproduction treatment at the Instituto de Medicina Reprodutiva e Fetal, from April 2009 to July 2014. Age, biochemical tests, and ultrasound were assessed. The data were analyzed to predict the follicular development and the relation between them, using, for statistical analysis, Statistical Package for Social Sciences software...
October 2016: Revista Brasileira de Ginecologia e Obstetrícia
https://www.readbyqxmd.com/read/27880974/deep-sequencing-of-the-tcrb-repertoire-of-human-foxp3-and-foxp3-t-cells-suggests-that-they-are-completely-distinct-and-non-overlapping
#7
Amit Golding, Samuel Darko, William H Wylie, Daniel C Douek, Ethan M Shevach
Maintenance of peripheral tolerance requires a balance between auto-reactive conventional T cells (Tconv) and thymically-derived Foxp3(+) regulatory T cells (tTregs). Considerable controversy exists regarding the similarities/differences in TCR repertoires expressed by Tconv and tTregs. We generated highly purified populations of human adult and cord blood Tconv and tTregs based on the differential expression of CD25 and CD127. The purity of the sorted populations was validated by intracellular staining for Foxp3 and Helios...
November 23, 2016: Clinical and Experimental Immunology
https://www.readbyqxmd.com/read/27878388/influence-of-geomagnetic-activity-and-earth-weather-changes-on-heart-rate-and-blood-pressure-in-young-and-healthy-population
#8
V A Ozheredov, S M Chibisov, M L Blagonravov, N A Khodorovich, E A Demurov, V A Goryachev, E V Kharlitskaya, I S Eremina, Z A Meladze
There are many references in the literature related to connection between the space weather and the state of human organism. The search of external factors influence on humans is a multi-factor problem and it is well known that humans have a meteo-sensitivity. A direct problem of finding the earth weather conditions, under which the space weather manifests itself most strongly, is discussed in the present work for the first time in the helio-biology. From a formal point of view, this problem requires identification of subset (magnetobiotropic region) in three-dimensional earth's weather parameters such as pressure, temperature, and humidity, corresponding to the days when the human body is the most sensitive to changes in the geomagnetic field variations and when it reacts by statistically significant increase (or decrease) of a particular physiological parameter...
November 22, 2016: International Journal of Biometeorology
https://www.readbyqxmd.com/read/27869983/microcephaly-in-brazil-prevalence-and-characterization-of-cases-from-the-information-system-on-live-births-sinasc-2000-2015
#9
Fatima Marinho, Valdelaine Etelvina Miranda de Araújo, Denise Lopes Porto, Helena Luna Ferreira, Marta Roberta Santana Coelho, Roberto Carlos Reyes Lecca, Helio de Oliveira, Ivana Pereira de Almeida Poncioni, Maria Helian Nunes Maranhão, Yluska Myrna Meneses Brandão E Mendes, Roberto Men Fernandes, Raquel Barbosa de Lima, Dácio de Lyra Rabello
OBJECTIVE: to describe the prevalence coefficients and characterize cases of microcephaly at birth in Brazil from 2000-2015. METHODS: this is a descriptive study with data from the Information System on Live Births (Sinasc). The coefficients were calculated by region and characteristics of mothers and live births (LB). RESULTS: the annual average number of microcephaly cases was 164 for the period 2000-2014, whilst in 2015, 1,608 cases were registered (54...
October 2016: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/27869923/cross-sectional-study-on-case-fatality-rate-due-to-hantavirus-infection-in-goi%C3%A3-s-state-brazil-2007-2013
#10
Hélio Ranes de Menezes, Marcos Lázaro Moreli, Ana Luiza Lima Sousa, Vivaldo Gomes da Costa
OBJECTIVE: to describe the epidemiological and clinical profile of hantavirus infection and to analyze factors associated with case-fatality in Goiás, Brazil. METHODS: this was a cross-sectional study on case fatality due to hantavirus infection from 2007 to 2013 using data from the Notifiable Diseases Information System (SINAN) for Goiás State. Logistic regression analysis was performed to estimate odds ratios (OR) with 95% confidence intervals (95%CI). RESULTS: 1,171 suspected cases were reported, of which 73 (6...
July 2016: Epidemiologia e Servicos de Saude: Revista do Sistema Unico de Saude do Brasil
https://www.readbyqxmd.com/read/27867968/implications-of-obesity-in-exceptional-longevity
#11
Alejandro Santos-Lozano, Helios Pareja-Galeano, Noriyuki Fuku, Nobuyoshi Hirose, Enzo Emanuele, Alejandro Lucia, Fabian Sanchis-Gomar
No abstract text is available yet for this article.
October 2016: Annals of Translational Medicine
https://www.readbyqxmd.com/read/27862364/3d-lifetime-tomography-reveals-how-cdcl2-improves-recombination-throughout-cdte-solar-cells
#12
Edward S Barnard, Benedikt Ursprung, Eric Colegrove, Helio R Moutinho, Nicholas J Borys, Brian E Hardin, Craig H Peters, Wyatt K Metzger, P James Schuck
Using two-photon tomography, carrier lifetimes are mapped in polycrystalline CdTe photovoltaic devices. These 3D maps probe subsurface carrier dynamics that are inaccessible with traditional optical techniques. They reveal that CdCl2 treatment of CdTe solar cells suppresses nonradiative recombination and enhances carrier lifetimes throughout the film with substantial improvements particularly near subsurface grain boundaries and the critical buried p-n junction.
November 15, 2016: Advanced Materials
https://www.readbyqxmd.com/read/27861536/muscle-related-polymorphisms-mstn-rs1805086-and-actn3-rs1815739-are-not-associated-with-exceptional-longevity-in-japanese-centenarians
#13
Noriyuki Fuku, Rafael Alis, Thomas Yvert, Hirofumi Zempo, Hisashi Naito, Yukiko Abe, Yasumichi Arai, Haruka Murakami, Motohiko Miyachi, Helios Pareja-Galeano, Enzo Emanuele, Nobuyoshi Hirose, Alejandro Lucia
Myostatin (MSTN) and α-actinin-3 (ACTN3) genes are potentially associated with preservation of muscle mass and oxidative capacity, respectively. To explore the possible role of these genes in exceptional longevity (EL), the allele/genotype frequency distribution of two polymorphisms in MSTN (rs1805086, K153R) and ACTN3 (rs1815739, R577X) was studied in Japanese centenarians of both sexes (n = 742) and healthy controls (n = 814). The rs1805086 R-allele (theoretically associated with muscle mass preservation at the expense of oxidative capacity) was virtually absent in the two groups, where genotype distributions were virtually identical...
2016: PloS One
https://www.readbyqxmd.com/read/27853909/not-all-drug-induced-parkinsonism-are-the-same-the-effect-of-drug-class-on-motor-phenotype
#14
Renato P Munhoz, Delcio Bertucci Filho, Hélio A G Teive
Drug-induced parkinsonism (DIP) is classically described as acute/subacute, bilateral symmetric syndrome in which tremor is infrequent compared to Parkinson's disease. Most DIP cases are caused by classic (CN) and second-generation neuroleptics (SN), and calcium channel blockers (CCB). We evaluated potentially distinctive demographic and clinical features in DIP among different drug classes. This was a prospective study of reversible DIP related to single selected drugs on each class. Baseline assessment included demographic, clinical data, and scales for staging, severity of motor signs of parkinsonism, tremor, and other involuntary movements...
November 16, 2016: Neurological Sciences
https://www.readbyqxmd.com/read/27850335/696-frequency-of-occurrence-and-antimicrobial-susceptibility-of-bacteria-in-icu-patients-with-pneumonia
#15
Helio Sader, Mariana Castanheira, Rodrigo Mendes, Robert Flamm
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27850289/650-ceftazidime-avibactam-activity-against-pseudomonas-aeruginosa-from-icu-and-non-icu-patients
#16
Helio Sader, Rodrigo Mendes, Mariana Castanheira, Robert Flamm
No abstract text is available yet for this article.
December 2016: Critical Care Medicine
https://www.readbyqxmd.com/read/27834805/tapirira-guianensis-aubl-extracts-inhibit-proliferation-and-migration-of-oral-cancer-cells-lines
#17
Renato José Silva-Oliveira, Gabriela Francine Lopes, Luiz Fernando Camargos, Ana Maciel Ribeiro, Fábio Vieira Dos Santos, Richele Priscila Severino, Vanessa Gisele Pasqualotto Severino, Ana Paula Terezan, Ralph Gruppi Thomé, Hélio Batista Dos Santos, Rui Manuel Reis, Rosy Iara Maciel de Azambuja Ribeiro
Cancer of the head and neck is a group of upper aerodigestive tract neoplasms in which aggressive treatments may cause harmful side effects to the patient. In the last decade, investigations on natural compounds have been particularly successful in the field of anticancer drug research. Our aim is to evaluate the antitumor effect of Tapirira guianensis Aubl. extracts on a panel of head and neck squamous cell carcinoma (HNSCC) cell lines. Analysis of secondary metabolites classes in fractions of T. guianensis was performed using Nuclear Magnetic Resonance (NMR)...
November 8, 2016: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/27828966/clinical-symptoms-imaging-features-and-cyst-distribution-in-the-cerebrospinal-fluid-compartments-in-patients-with-extraparenchymal-neurocysticercosis
#18
Rodrigo Bazan, Pedro Tadao Hamamoto Filho, Gustavo José Luvizutto, Hélio Rubens de Carvalho Nunes, Newton Satoru Odashima, Antônio Carlos Dos Santos, Jorge Elias Júnior, Marco Antônio Zanini, Agnès Fleury, Osvaldo Massaiti Takayanagui
Extraparenchymal neurocysticercosis has an aggressive course because cysts in the cerebrospinal fluid compartments induce acute inflammatory reactions. The relationships between symptoms, imaging findings, lesion type and location remain poorly understood. In this retrospective clinical records-based study, we describe the clinical symptoms, magnetic resonance imaging features, and cyst distribution in the CSF compartments of 36 patients with extraparenchymal neurocysticercosis. Patients were recruited between 1995 and 2010 and median follow up was 38 months...
November 2016: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/27828653/syndrome-in-question-antisynthetase-syndrome-anti-pl-7
#19
Ana Cláudia Cavalcante Esposito, Tatiana Cristina Gige, Hélio Amante Miot
Antisynthetase syndrome is a rare autoimmune disease characterized by interstitial lung disease and/or inflammatory myositis, with positive antisynthetase antibodies (anti-Jo-1, anti-PL-7, anti-PL-12, ZO, OJ, anti-KE or KS). Other symptoms described include: non-erosive arthritis, fever, Raynaud's phenomenon, and "mechanic's hands." The first therapeutic option is corticotherapy, followed by other immunosuppressants. The prognosis of the disease is quite limited when compared to other inflammatory myopathies with negative antisynthetase antibodies...
September 2016: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/27826566/variations-in-mrna-and-protein-levels-of-ikaros-family-members-in-pediatric-t-cell-acute-lymphoblastic-leukemia
#20
Julie L Mitchell, Thomas M Yankee
BACKGROUND: Pediatric T cell acute lymphoblastic leukemia (T-ALL) is a highly heterogeneous disease in which the cells share phenotypic characteristics with normal human thymocytes. The Ikaros family of transcription factors includes five members that are required for normal T cell development and are implicated in leukemogenesis. The goal of this work was to correlate the pattern of expression of Ikaros family members with the phenotype of the T-ALL cells. METHODS: We obtained twenty-four samples from pediatric T-ALL patients and used multi-parameter flow cytometry to characterize each sample, comparing the phenotype of the leukemic cells with normal human thymocytes...
October 2016: Annals of Translational Medicine
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