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https://www.readbyqxmd.com/read/28535346/on-the-optimization-of-current-injection-in-algainp-core-shell-nanowire-light-emitting-diodes
#1
Pyry Kivisaari, Alexander Berg, Mohammad Karimi, Kristian Storm, Steven Limpert, Jani Oksanen, Lars Samuelson, Håkan Jan Pettersson, Magnus T Borgström
Core-shell nanowires offer great potential to enhance the efficiency of light-emitting diodes (LEDs) and expand the attainable wavelength range of LEDs over the whole visible spectrum. Additionally, nanowire LEDs can offer both improved light extraction and emission enhancement if the diameter of the wires is not larger than half the emission wavelength (λ/2). However, AlGaInP nanowire LEDs have so far failed to match the high efficiencies of traditional planar technologies, and the parameters limiting the efficiency remain unidentified...
May 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28535059/room-temperature-inp-inasp-quantum-discs-in-nanowire-infrared-photodetectors
#2
Mohammad Karimi, Vishal Jain, Magnus Heurlin, Ali Nowzari, Laiq Hussain, David Lindgren, Jan Eric Stehr, Irina A Buyanova, Anders Gustafsson, Lars Samuelson, Magnus T Borgström, Håkan Jan Pettersson
The possibility to engineer nanowire heterostructures with large bandgap variations is particularly interesting for technologically important broadband photodetector applications. Here we report on a combined study of design, fabrication and optoelectronic properties of infrared photodetectors comprising 4 million n+-i-n+ InP nanowires periodically ordered in arrays. The nanowires were grown by metal-organic vapor phase epitaxy on InP substrates, with either a single or 20 InAsP quantum discs embedded in the i-segment...
May 23, 2017: Nano Letters
https://www.readbyqxmd.com/read/28534697/pregnancy-outcome-of-laparoscopic-tubal-reanastomosis-retrospective-results-from-a-single-clinical-centre
#3
Rana Karayalcin, Sarp Ozcan, Aytekin Tokmak, Beril Gürlek, Okan Yenicesu, Hakan Timur
Objective Tubal sterilization is a widespread method of contraception. Post-sterilization regret is encountered, despite careful consideration prior to the procedure. Two treatment options are available for women after having had tubal sterilization: microsurgical reversal and IVF treatment. Recent improvements in laparoscopy have allowed tubal reanastomosis to be performed. This study aimed to evaluate the reproductive outcome after laparoscopic tubal reanastomosis and surgical features of the patients. Methods From June 2007 to January 2010, 27 patients with bilateral tubal ligation who underwent laparoscopic tubal reanastomosis were evaluated retrospectively...
January 1, 2017: Journal of International Medical Research
https://www.readbyqxmd.com/read/28534282/template-free-synthesis-of-phosphate-based-spheres-via-modified-supersaturated-phosphate-buffer-solutions
#4
Tao Qin, Yuanyuan Han, Peng Zhang, Ishtiaq Hassan Wani, Fredrik Nikolajeff, Klaus Leifer, Håkan Engqvist
Modified supersaturated phosphate buffer solutions were used to synthesize phosphate-based spheres, including calcium phosphate (CaP), strontium phosphate (SrP) and barium phosphate (BaP). A series of ions concentrations in the modified phosphate buffer solutions were investigated in order to study their effects in precipitates morphologies. During synthesis, it was found that magnesium was the key factor in sphere formation. The morphologies of calcium phosphate, strontium phosphate and barium phosphate precipitates varied as the concentration of magnesium ions varied...
July 2017: Journal of Materials Science. Materials in Medicine
https://www.readbyqxmd.com/read/28532175/patient-presenting-with-frontal-subperiosteal-abscess-and-headache-a-case-of-pott-s-puffy-tumour
#5
Hakan Şimşek
Chronic sinusitis can be complicated with erosion of anterior or posterior wall of the sinus; causing Pott's puffy tumour in the anterior, or epidural abscess in the posterior communication. A 65-year old man with a painful swelling in his forehead is presented. Pott's puffy tumour was diagnosed. CT, MRI, and DTI studies were obtained. Epidural or dural involvement was not present. In the first operation, anterior wall of the frontal sinus wall was opened. Osteomyelitis debridement was performed and the frontonasal duct was enlarged endoscopically...
May 22, 2017: British Journal of Neurosurgery
https://www.readbyqxmd.com/read/28530779/predictive-factors-for-early-hospital-readmission-and-1-year-mortality-in-elder-patients-following-surgical-treatment-of-a-hip-fracture
#6
Hakan Sofu, Hanifi Üçpunar, Yalkın Çamurcu, Serda Duman, Mehmet Nuri Konya, Sarper Gürsu, Vedat Şahin
BACKGROUND: Early hospital readmission after surgically treated hip fracture is a common entity, often involving an adverse event and causing strains on an already overburdened healthcare system. The main purposes of the present study were to determine the 30-day readmission rate, analyze the predictive factors for early hospital readmissions, and assess 1-year mortality following surgical treatment of hip fracture in elderly patients. Retrospective case-control study. METHODS: In total, 517 patients with a mean age of 74 years were evaluated...
May 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28530770/diagnostic-value-of-appendicular-doppler-ultrasonography-in-acute-appendicitis
#7
Hüseyin Uzunosmanoğlu, Yunsur Çevik, Şeref Kerem Çorbacıoğlu, Emine Akıncı, Hakan Buluş, Kadir Ağladıoğlu
BACKGROUND: Acute appendicitis is one of the most common causes of acute abdominal pain prompting emergency department (ED) visits. It is critical for the physicians to promptly and accurately diagnose acute appendicitis. The present study aimed to evaluate the diagnostic efficacy of Doppler ultrasonography (USG) in patients with acute appendicitis and compare this new method with other commonly used radio-diagnostic tools. METHODS: All patients who were diagnosed with acute appendicitis at the Kecioren Training and Research Hospital ED and later underwent appendectomy between October 2012 and April 2013 were included in the study...
May 2017: Ulusal Travma Ve Acil Cerrahi Dergisi, Turkish Journal of Trauma & Emergency Surgery: TJTES
https://www.readbyqxmd.com/read/28529740/copy-number-variation-and-protein-expression-of-dot1l-in-pancreatic-adenocarcinoma-as-a-potential-drug-target
#8
Heike Loeser, Dirk Waldschmidt, Fabian Kuetting, Carina Heydt, Thomas Zander, Patrick Plum, Hakan Alakus, Reinhard Buettner, Alexander Quaas
Adenocarcinoma of the pancreas has a poor prognosis. At present, no relevant personalized targets have been identified. Sequencing studies have implicated gene alterations of disruptor of telomeric silencing 1 like histone lysine methyltransferase (DOT1L) in pancreatic adenocarcinoma. DOT1L is part of the histone modification system and catalyzes methylation of H3K79, which is crucial in cell signaling and DNA damage repair. DOT1L is considered to be a target of therapy in mixed lineage leukemia gene-deficient leukemia cases and a potential target in breast carcinoma...
May 2017: Molecular and Clinical Oncology
https://www.readbyqxmd.com/read/28529174/inhibitory-rtms-of-secondary-somatosensory-cortex-reduces-intensity-but-not-pleasantness-of-gentle-touch
#9
Laura K Case, Claire M Laubacher, Emily A Richards, Primavera Spagnolo, Håkan Olausson, MCatherine Bushnell
Research suggests that the discriminative and affective aspects of touch are processed differently in the brain. Primary somatosensory cortex is strongly implicated in touch discrimination, whereas insular and prefronal regions have been associated with pleasantness aspects of touch. However, the role of secondary somatosensory cortex (S2) is less clear. In the current study we used inhibitory repetitive transcranial magnetic stimulation (rTMS) to temporarily deactivate S2 and probe its role in touch perception...
May 18, 2017: Neuroscience Letters
https://www.readbyqxmd.com/read/28529011/the-effect-of-in-vivo-created-vascularized-neurotube-on-peripheric-nerve-regeneration
#10
Abdul Kerim Yapici, Yalcin Bayram, Hakan Akgun, Recep Gumus, Fatih Zor
INTRODUCTION: Creating vascularized nerve conduits for treatment of nerve gaps have been researched, however, these methods need microsurgical anastomosis thereby complicating the nerve repair process. Thus, the concept of vascularized nerve conduits has not popularized up till now. The aim of this study is to evaluate the effects of vascularized and non-vascularized biological conduits on peripheral nerve regeneration. MATERIAL AND METHODS: Following ethical board approval, 15 Sprague-Dawley rats were used in the study...
May 11, 2017: Injury
https://www.readbyqxmd.com/read/28526368/synthesis-and-molecular-docking-study-of-some-5-6-dichloro-2-cyclopropyl-1h-benzimidazole-derivatives-bearing-triazole-oxadiazole-and-imine-functionalities-as-potent-inhibitors-of-urease
#11
Emre Menteşe, Hakan Bektaş, Bahar Bilgin Sokmen, Mustafa Emirik, Demet Çakır, Bahittin Kahveci
A new series of benzimidazole compounds including hydrazinecarbothioamide, 1,2,4-triazole, 1,3,4-oxadiazole and imine function were synthesized starting from 5,6-dichloro-2-cyclopropyl-1H-benzimidazole. All of the benzimidazole derivatives exhibited good urease inhibitor activity. Compound 6a proved to be the most potent showing an enzyme inhibitory activity with an IC50=0.06µM. Molecular docking studies were also conducted on enzyme extracted from Jack bean urease to identify the binding mode of the newly synthesized compounds...
May 10, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28523025/association-of-vitamin-d-insufficiency-deficiency-with-thyroid-artery-doppler-ultrasonography-in-patients-with-hashimoto-thyroiditis
#12
Ahmet Nalbant, Ayhan Aydin, Alper Karacan, Attila Onmez, Ali Tamer, Hakan Cinemre
BACKGROUND & OBJECTIVE: During the course of the autoimmune thyroid diseases, ultrasonography change parallel to histopathology. Vitamin D is associated with autoimmune diseases and thus can affect thyroid blood flow. Our aim was to investigate the relationship between vitamin D insufficiency/deficiency and thyroid hemodynamic indices in patients with Hashimoto thyroiditis. METHODS: A total of 93 patients who presented to Sakarya University Endocrinology outpatient clinic from April to September 2016 and diagnosed with Hashimoto thyroiditis were included in this study...
March 2017: Pakistan Journal of Medical Sciences Quarterly
https://www.readbyqxmd.com/read/28516385/conservative-surgical-treatment-predictors-of-maternal-hydronephrosis-results-of-a-single-center-retrospective-non-randomized-non-controlled-observational-study
#13
Hakan Ercil, Burak Arslan, Ferhat Ortoglu, Ergun Alma, Umut Unal, Mehmet Eflatun Deniz, Aykut Bugra Senturk, Zafer Gokhan Gurbuz
PURPOSE: To determine the parameters that may help the clinicians decide the best suitable treatment method for the pregnant women with symptomatic hydronephrosis which will be based on the easily accessible laboratory tests, monitoring methods and clinical symptoms. METHODS: Digital data and documents of 246 pregnant women with symptomatic hydronephrosis who were hospitalized in our clinic between the dates of January 2011 and January 2016 were retrospectively evaluated...
May 17, 2017: International Urology and Nephrology
https://www.readbyqxmd.com/read/28515413/magnetic-susceptibility-changes-in-the-basal-ganglia-and-brain-stem-of-patients-with-wilson-s-disease-evaluation-with-quantitative-susceptibility-mapping
#14
Selim Doganay, Kazim Gumus, Gonca Koc, Ayse Kacar Bayram, Mehmet Sait Dogan, Duran Arslan, Hakan Gumus, Sureyya Burcu Gorkem, Saliha Ciraci, Halil Ibrahim Serin, Abdulhakim Coskun
OBJECTIVES: Wilson's disease (WD) is characterized with the accumulation of copper in the liver and brain. The objective of this study is to quantitatively measure the susceptibility changes of basal ganglia and brain stem of pediatric patients with neurological WD using quantitative susceptibility mapping (QSM) in comparison to healthy controls. METHODS: Eleven patients with neurological WD (mean age 15 ± 3.3 years, range 10-22 years) and 14 age-matched controls were prospectively recruited...
May 18, 2017: Magnetic Resonance in Medical Sciences: MRMS
https://www.readbyqxmd.com/read/28513730/accurate-measurement-of-the-chirality-of-ws2-nanotubes
#15
Youhu Chen, Hakan Deniz, Lu-Chang Qin
We describe the structural parameters and atomic positions of a single-walled WS2 nanotube. The structure factor is calculated in detail using analytic expressions for both single-walled and multi-walled WS2 nanotubes. A zoning scheme has been developed to obtain the ratio m/n from the electron diffraction patterns. The procedure for determination of the chiral indices of both single-walled and multi-walled WS2 nanotubes and the tilt angle is illustrated in detail for either normal incidence or inclined incidence...
May 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/28510238/replik-till-ola-samuelsson-och-aso-saeed-l%C3%A3-kemedelsverket-ser-%C3%A3-ver-skrivningen
#16
Tora Almquist, Susan Erichsen, Håkan Wallén
No abstract text is available yet for this article.
May 11, 2017: Läkartidningen
https://www.readbyqxmd.com/read/28509935/utilization-of-bone-wax-as-a%C3%A2-marker-for-spatial-orientation-in-intraoperative-magnetic-resonance-imaging
#17
Pinar Celtikci, Emrah Celtikci, Hakan Emmez, Murat Ucar, Alp Özgün Börcek
No abstract text is available yet for this article.
May 16, 2017: Clinical Neuroradiology
https://www.readbyqxmd.com/read/28509508/a-survey-on-prevalence-causes-and-prevention-of-postcementation-hypersensitivity
#18
Zülfikar Demirtag, Recep Uzgur, Mustafa Turkal, Zeynep Uzgur, Hakan Çolak, Mutlu Özcan
This study evaluated the prevalence and causes of post-cementation sensitivity and possible prevention measures according to the experience of dentists through an internet survey. A questionnaire was prepared with 25 items based on a survey introduced by Rosenstiel and Rashid. An online site was created for the participation to the survey. A total of 322 participants responded the questionnaire. The results of the questionnaire indicated the amount of tooth preparation (42.1%) is the most frequent reason for hypersensitivity followed by water-cooling with pressure (11...
September 2016: European Journal of Prosthodontics and Restorative Dentistry
https://www.readbyqxmd.com/read/28508755/desmoplastic-fibroblastoma-an-unusual-dermal-presentation-on-the-buttock-of-a-patient-with-muscular-dystrophy
#19
Özgür Timurkaynak, Metin Ertem, Hakan Gök, Umit Ince
No abstract text is available yet for this article.
May 16, 2017: European Journal of Dermatology: EJD
https://www.readbyqxmd.com/read/28508005/an-unusual-first-manifestation-of-hodgkin-lymphoma-epitrochlear-lymph-node-%C3%A4-nvolvement-a-case-report-and-brief-review-of-literature
#20
Veysi Hakan Yardimci, Aytul Hande Yardimci
Although epitrochlear lymph nodes may be enlarged as a part of generalized lymphadenopathy, isolated enlargement of epitrochlear lymph nodes is rarely seen. We describe Hodgkin's lymphoma in a 55-year-old male who presented with isolated epitrochlear lymphadenopathy of his right arm. In the histopathological examination of the epitrochlear lymph node was a lymphocyte-rich Hodgkin lymphoma with a clinical grade (CS IA) diagnosed. The diagnosis was confirmed, via the bone marrow biopsy and positron emission tomography/computed tomography imaging, as pathological stage PS IA and clinical stage CS IA...
April 2017: Journal of Investigative Medicine High Impact Case Reports
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