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https://www.readbyqxmd.com/read/28532131/investigation-into-the-anomalous-temperature-characteristics-of-ingan-double-quantum-well-blue-laser-diodes-using-numerical-simulation
#1
Han-Youl Ryu
GaN-based blue laser diodes (LDs) may exhibit anomalous temperature characteristics such as a very high characteristic temperature (T 0) or even negative T 0. In this work, temperature-dependent characteristics of GaN-based blue LDs with InGaN double quantum well (QW) structures were investigated using numerical simulations. The temperature-dependent threshold current is found to become increasingly anomalous as the thickness or doping concentration of the barrier layer between QWs increases. For a properly chosen barrier thickness and doping concentration, very high T 0 of >10,000 K can be obtained...
December 2017: Nanoscale Research Letters
https://www.readbyqxmd.com/read/28532015/effect-of-sintering-temperature-rise-from-870-to-920%C3%A2-c-on-physicomechanical-and-biological-quality-of-nano-hydroxyapatite-an-explorative-multi-phase-experimental-in-vitro-vivo-study
#2
Ahad Khoshzaban, Vahid Rakhshan, Farhood Najafi, Leila Aghajanpour, Seyed Jafar Hashemian, Saeed Heidari Keshel, Ikuya Watanabe, Alireza Valanezhad, Tahereh Sadat Jafarzadeh Kashi
Hydroxyapatite (HA) is a proper scaffold for bone repair, however, it is not of excellent mechanical properties. Most previous studies on the effect of temperature increases were in vitro and had assessed merely improvements of HA's physicomechanical quality. This in vitro/vivo study investigated the effect of temperature increases from 870 to 920°C on physicomechanical and biological quality of Nano-HA. Forty experimentally produced HA disks sintered at 870 to 920°C were prepared (n=20×2). Disks were subjected to Vickers microindentation test (1 disk from each group divided into 4 quarters), Fourier transform infrared spectroscopy (1 disk), X-ray diffraction (XRD) [1 disk together with non-sintered HA], field emission scanning electron microscopy (FSEM, 1 disk from each group together with non-sintered HA), cell seeding and SEM assessment (2 disks), MTT assay over 4 different time periods (16 quadrants of 4 disks from each group), 6 one-thirds of 2 disks from each group for immunocytochemical (ICC) assay, and 8 disks from each group [as well as non-sintered HA] for the animal study (implantation in 4 sockets in 8 rabbits [32 specimens], histomorphometry, and computerized tomography) over two time periods...
August 1, 2017: Materials Science & Engineering. C, Materials for Biological Applications
https://www.readbyqxmd.com/read/28531559/per-and-polyfluoroalkyl-substances-in-firefighting-foam-concentrates-and-water-samples-collected-near-sites-impacted-by-the-use-of-these-foams
#3
Xavier Dauchy, Virginie Boiteux, Cristina Bach, Christophe Rosin, Jean-François Munoz
To extinguish large-scale fuel fires, fluorosurfactant based foams (FSBFs) were developed in the 1960s and have been used ever since. In this study, 154 per- and polyfluoroalkyl substances (PFASs) including 122 emerging PFASs used as surfactants in FSBFs were sought in nine different foam concentrates. Field investigations were also carried out in the vicinity of four sites where FSBFs are or were intensively used (two airports, a training center for firefighters and an oil storage depot after a large explosion)...
May 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28531260/comparison-of-kaposi-sarcoma-risk-in-hiv-positive-adults-across-five-continents-a-multiregional-multicohort-study
#4
Julia Bohlius
Background: We compared Kaposi sarcoma (KS) risk in adults who initiated antiretroviral therapy (ART) across the Asia-Pacific, South Africa, Europe, Latin, and North America. Methods: We included cohort data of HIV-positive adults who initiated ART after 1995 within the framework of two large collaborations of observational HIV cohorts. We present incidence rates and adjusted hazard ratios (aHRs). Results: We included 208,140 patients from 57 countries...
May 20, 2017: Clinical Infectious Diseases: An Official Publication of the Infectious Diseases Society of America
https://www.readbyqxmd.com/read/28531231/utility-of-th1-cell-immune-responses-for-distinguishing-active-tuberculosis-from-non-active-tuberculosis-a-case-control-study
#5
Lifan Zhang, Xinhe Cheng, Sainan Bian, Yanhua Song, Qiang Li, Mengqiu Gao, Yueqiu Zhang, Xiaochun Shi, Xiaoqing Liu
Currently available Interferon-γ release assay (IGRA) cannot reliably differentiate active TB (ATB) from non-active TB (non-ATB). A study was performed to evaluate the value of Mycobacterium tuberculosis (MTB) specific Th1 cell immune responses which test IFN-γ and IL-2 simultaneous for differentiating ATB from non-ATB. Forty-nine newly diagnosed inpatients with ATB (26 pulmonary TB and 23 extrapulmonary TB) were enrolled as the ATB group. Forty-five volunteers with latent tuberculosis infection (LTBI) and twenty with evidence of previous TB were enrolled during the same period as the non-ATB group...
2017: PloS One
https://www.readbyqxmd.com/read/28531222/monitoring-the-elimination-of-human-african-trypanosomiasis-update-to-2014
#6
José R Franco, Giuliano Cecchi, Gerardo Priotto, Massimo Paone, Abdoulaye Diarra, Lise Grout, Raffaele C Mattioli, Daniel Argaw
BACKGROUND: The World Health Organization (WHO) has targeted the elimination of Human African trypanosomiasis (HAT) 'as a public health problem' by 2020. The selected indicators of elimination should be monitored every two years, and we provide here a comprehensive update to 2014. The monitoring system is underpinned by the Atlas of HAT. RESULTS: With 3,797 reported cases in 2014, the corresponding milestone (5,000 cases) was surpassed, and the 2020 global target of 'fewer than 2,000 reported cases per year' seems within reach...
May 22, 2017: PLoS Neglected Tropical Diseases
https://www.readbyqxmd.com/read/28531102/nanoparticles-as-theranostic-vehicles-in-experimental-and-clinical-applications-focus-on-prostate-and-breast-cancer
#7
REVIEW
Jörgen Elgqvist
Prostate and breast cancer are the second most and most commonly diagnosed cancer in men and women worldwide, respectively. The American Cancer Society estimates that during 2016 in the USA around 430,000 individuals were diagnosed with one of these two types of cancers, and approximately 15% of them will die from the disease. In Europe, the rate of incidences and deaths are similar to those in the USA. Several different more or less successful diagnostic and therapeutic approaches have been developed and evaluated in order to tackle this issue and thereby decrease the death rates...
May 20, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28531094/cost-effectiveness-of-a-community-exercise-and-nutrition-program-for-older-adults-texercise-select
#8
Olufolake Odufuwa Akanni, Matthew Lee Smith, Marcia G Ory
The wide-spread dissemination of evidence-based programs that can improve health outcomes among older populations often requires an understanding of factors influencing community adoption of such programs. One such program is Texercise Select, a community-based health promotion program previously shown to improve functional health, physical activity, nutritional habits and quality of the life among older adults. This paper assesses the cost-effectiveness of Texercise Select in the context of supportive environments to facilitate its delivery and statewide sustainability...
May 20, 2017: International Journal of Environmental Research and Public Health
https://www.readbyqxmd.com/read/28530888/genomic-relatedness-of-staphylococcus-pettenkoferi-isolates-of-different-origins
#9
Emeli Månsson, Bengt Hellmark, Marc Stegger, Paal Skytt Andersen, Martin Sundqvist, Bo Söderquist
PURPOSE: The aim of the study was to characterize clinical and environmental Staphylococcus pettenkoferi isolates with regard to genomic diversity and antibiotic susceptibility pattern. Repetitive-sequence-based PCR and core genome phylogenetic analysis of whole-genome sequencing (WGS) data verified the presence of distinct clades comprising closely related S. pettenkoferi isolates from different geographical locations and origins. METHODOLOGY: Phylogenetic relationships between 25 S...
May 2017: Journal of Medical Microbiology
https://www.readbyqxmd.com/read/28530852/long-term-risk-of-subsequent-malignant-neoplasms-after-treatment-of-childhood-cancer-in-the-dcog-later-study-cohort-role-of-chemotherapy
#10
Jop C Teepen, Flora E van Leeuwen, Wim J Tissing, Eline van Dulmen-den Broeder, Marry M van den Heuvel-Eibrink, Helena J van der Pal, Jacqueline J Loonen, Dorine Bresters, Birgitta Versluys, Sebastian J C M M Neggers, Monique W M Jaspers, Michael Hauptmann, Margriet van der Heiden-van der Loo, Otto Visser, Leontien C M Kremer, Cécile M Ronckers
Purpose Childhood cancer survivors (CCSs) are at increased risk for subsequent malignant neoplasms (SMNs). We evaluated the long-term risk of SMNs in a well-characterized cohort of 5-year CCSs, with a particular focus on individual chemotherapeutic agents and solid cancer risk. Methods The Dutch Childhood Cancer Oncology Group-Long-Term Effects After Childhood Cancer cohort includes 6,165 5-year CCSs diagnosed between 1963 and 2001 in the Netherlands. SMNs were identified by linkages with the Netherlands Cancer Registry, the Dutch Pathology Registry, and medical chart review...
May 22, 2017: Journal of Clinical Oncology: Official Journal of the American Society of Clinical Oncology
https://www.readbyqxmd.com/read/28530820/behavior-of-germanium-and-silicon-nanowire-anodes-with-ionic-liquid-electrolytes
#11
Guk-Tae Kim, Tadhg Kennedy, Michael Brandon, Hugh Geaney, Kevin M Ryan, Stefano Passerini, Giovanni Battista Appetecchi
The electrochemical behavior of binder-free, germanium and silicon nanowires as high capacity anode materials for lithium-ion battery systems are investigated in an ionic liquid electrolyte. Cyclic voltammetry, cycling tests and impedance spectroscopy reveal a highly reversible lithium alloying / de-alloying process, as well as promising compatibility between the Ge and Si materials and the electrolyte components. Reversible capacities of 1,400 and 2,200 mA h g-1 are delivered by the Ge and Si anodes, respectively, matching the values exhibited in conventional organic solutions...
May 22, 2017: ACS Nano
https://www.readbyqxmd.com/read/28530525/cost-effectiveness-of-nivolumab-ipilimumab-combination-therapy-compared-with-monotherapy-for-first-line-treatment-of-metastatic-melanoma-in-the-united-states
#12
Anna Oh, Dang M Tran, Leann C McDowell, Dor Keyvani, Jay Andrew Barcelon, Oscar Merino, Leslie Wilson
BACKGROUND: The approval of new immunotherapies has dramatically changed the treatment landscape of metastatic melanoma. These survival gains come with trade-offs in side effects and costs, as well as important considerations for third-party payer systems, physicians, and patients. OBJECTIVE: To develop a Markov model to determine the cost-effectiveness of nivolumab, ipilimumab, and nivolumab-ipilimumab combination as firstline therapy in metastatic melanoma, while accounting for differential effectiveness in programmed death-ligand 1 (PD-L1) positive and negative patients...
June 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28530523/cost-effectiveness-of-peginterferon-beta-1a-and-alemtuzumab-in-relapsing-remitting-multiple-sclerosis
#13
Ankur A Dashputre, Khalid M Kamal, Gauri Pawar
BACKGROUND: Multiple sclerosis (MS) is a chronic inflammatory disorder of the central nervous system, affecting 2.5 million people globally and 400,000 people in the United States. While no cure exists for MS, the goal is to manage the disease using disease-modifying therapies (DMTs), which have been shown to slow disease progression and prevent relapses. Relapsing-remitting MS (RRMS) is the most common form of MS at the time of diagnosis. Peginterferon beta-1a (PEG) and alemtuzumab (ALT) were recently approved and have demonstrated good clinical outcomes, including reduced relapse rates in clinical trials...
June 2017: Journal of Managed Care & Specialty Pharmacy
https://www.readbyqxmd.com/read/28530515/cost-effectiveness-of-strategies-to-increase-cervical-screening-uptake-at-first-invitation-strategic
#14
Apostolos Tsiachristas, Matthew Gittins, Henry Kitchener, Alastair Gray
Objective To assess the cost-effectiveness of strategies to increase cervical cancer screening uptake at first invitation (STRATEGIC trial). Methods We performed an economic analysis alongside the STRATEGIC trial, comparing each of seven novel interventions for improving cervical screening uptake with control general practices in Greater Manchester and Grampian (United Kingdom). A template was developed to measure the intervention costs. Trial estimates of screening uptake were combined with data from the literature to estimate healthcare costs of each intervention...
January 1, 2017: Journal of Medical Screening
https://www.readbyqxmd.com/read/28530454/-hungarian-diet-and-nutritional-status-survey-the-otap2014-study-iv-microelement-intake-of-the-hungarian-population
#15
Barbara Nagy, Zsuzsanna Nagy-Lőrincz, Márta Bakacs, Éva Illés, Eszter Sarkadi Nagy, Gergő Erdei, Éva Martos
INTRODUCTION AND AIM: The Hungarian Diet and Nutritional Status Survey examined the dietary habits of the Hungarian population. This publication presents the microelement intake. METHOD: The survey represents the microelement intake of the Hungarian non-institutionalised adult population of 18 years and older. RESULTS: While the intake of iron, copper and manganese corresponded with the recommendations in males, in females it was insufficient...
May 2017: Orvosi Hetilap
https://www.readbyqxmd.com/read/28530447/middle-ear-function-and-pathophysiology-in-andean-children-living-at-high-altitudes
#16
S Allen Counter, Leo H Buchanan, Fernando Ortega, Anthony B Jacobs, Göran Laurell
Counter, S. Allen, Leo H. Buchanan, Fernando Ortega, Anthony B. Jacobs, and Göran Laurell. Middle ear function and pathophysiology in Andean children living at high altitudes. High Alt Med Biol 00:000-000, 2017.-The extent of altitude-related middle ear disorders in children native to high altitudes is unclear. This study examined middle ear pathophysiology in two groups of children living in high-altitude Ecuadorian Andean communities by investigating middle ear pressure (MEP), tympanic membrane compliance (TMC), and ear canal volume (ECV) using tympanometry, and by otological examination...
May 22, 2017: High Altitude Medicine & Biology
https://www.readbyqxmd.com/read/28530425/review-of-hermann-lotze-an-intellectual-biography
#17
Horst Gundlach
Reviews the book, Hermann Lotze: An Intellectual Biography by William R. Woodward (see record 2015-31971-000). Lotze (1817-1881), the once-renowned physician, philosopher, and psychologist, as well as professor in Leipzig, Göttingen, and Berlin, was one of the last philosophers who actually planned a system of philosophy. In this book, Woodward has presented the results of his decades-long engagement with Lotze and his personal, intellectual, and political environment. The reviewer believes that any problems with the book, small or not so small, should not divert the attention from the merits Woodward has earned with this energetically researched, insightful work that deserves its place as an excellent stepping stone for reconsidering Lotze's place in the historiography of philosophy and psychology of the 19th century...
May 2017: History of Psychology
https://www.readbyqxmd.com/read/28530108/twelve-day-quintuple-regime-containing-four-antibiotics-as-a-rescue-therapy-for-helicobacter-pylori-eradication-in-the-central-region-of-portugal
#18
Diogo Branquinho, Nuno Miguel Peres de Almeida, Carlos Gregório, Adriano Casela, Maria Manuel Donato, Luís Tomé
BACKGROUND: Helicobacter pylori eradication rates with standard triple therapy in many countries are clinically unacceptable. Fluoroquinolone resistance is increasing and jeopardizing second-line regimens. There is a growing need for an effective strategy in patients who failed previous therapies. METHODS: This is a single-center, non-randomized clinical study conducted in the central region of Portugal. Sixty-four patients were included with a positive 13C-urea breath test (UBT) or histology for H...
May 22, 2017: Revista Española de Enfermedades Digestivas
https://www.readbyqxmd.com/read/28530082/-cervical-cancer-in-israel-2016-facts-insights-and-thoughts-for-the-future
#19
REVIEW
Menahem Fisher, Eduardo Schejter, Ido Solt, Gad Renart
The natural history of precancerous lesions and cervical cancer in Israeli women differs from that reported in the world. In 2011, 244 women were diagnosed in Israel with invasive cervical cancer, with the mortality of 79 women. The incidence of cervical cancer in Israel is about 5 new cases per year per 100,000 women (5.4 Jewish, 3.2 Arab). This figure is very low compared with statistics presented in other countries and has not changed over the last decades. The vast majority of Israeli women were diagnosed due to symptoms and not following Pap smear screening...
September 2016: Harefuah
https://www.readbyqxmd.com/read/28530060/-the-truth-about-the-ringworm-affair
#20
REVIEW
Aya Bar Oz
Ringworm of the scalp (Tinea Capitis), a fungal skin ailment that appears on the scalp, was treated until the early sixties by radiation therapy. It was discovered during the seventies that radiation treatment for ringworm may be associated with a higher risk of cancerous and benign tumors in the head and neck area for patients undergoing treatment. In 1995, Israel enacted a law to compensate ringworm irradiation patients which provided monetary compensation for those who were treated between 1946 and 1960...
October 2016: Harefuah
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