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https://www.readbyqxmd.com/read/28621527/dielectrophoretic-assembled-single-and-parallel-aligned-ag-nanowire-zno-branched-nanorods-heteronanowires-uv-photodetectors
#1
Zhi Yang, Minqiang Wang, Qiang Zhao, Hengwei Qiu, Junjie Li, Xiangming Li, Jinyou Shao
The branched hierarchical heteronanowires have been widely studied for optoelectronics application due to their unique electronic and photonic performances. Here, we successfully synthesized Ag nanowire-ZnO branched nanorods heteronanowires based on improved hydrothermal method. Then we fabricated single heteronanowire across an Au electrode pairs with different gap width and parallel aligned heteronanowires on Au interdigitated electrode with dielectrophoresis method, indicating the flexibility and operability of dielectrophoresis assembly method...
June 16, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28615058/long-term-prognostic-significance-of-rising-psa-levels-following-radiotherapy-for-localized-prostate-cancer-focus-on-overall-survival
#2
Carla Freiberger, Vanessa Berneking, Thomas-Alexander Vögeli, Ruth Kirschner-Hermanns, Michael J Eble, Michael Pinkawa
BACKGROUND: The aim of this study was to evaluate the long-term prognostic significance of rising PSA levels, particularly focussing on overall survival. METHODS: Two hundred ninety-five patients with localized prostate cancer were either treated with low-dose-rate (LDR) brachytherapy with I-125 seeds as monotherapy (n = 94; 145Gy), high-dose-rate (HDR) brachytherapy with Ir-192 as a boost to external beam RT (n = 66; 50.4Gy in 1.8Gy fractions EBRT + 18Gy in 9Gy fractions HDR) or EBRT alone (70...
June 14, 2017: Radiation Oncology
https://www.readbyqxmd.com/read/28582638/association-of-cd147-genetic-polymorphisms-with-carotid-atherosclerotic-plaques-in-a-han-chinese-population-with-cerebral-infarction
#3
Tongtian Ni, Min Chen, Kang Yang, Jianwei Shao, Yi Fu, Weijun Zhou
INTRODUCTION: Given the important role of CD147 in the development of atherosclerosis, we speculated that CD147 genetic polymorphisms might influence the formation of carotid atherosclerotic plaques. The study was to investigate the association between CD147 gene polymorphisms and susceptibility to carotid atherosclerotic plaques in individuals with cerebral infarction (CI). METHODS: Eight SNPs in the regulatory and coding regions of the CD147 gene were examined using polymerase chain reaction-ligase detection reaction (PCR-LDR) in DNA samples from 732 Chinese patients with CI, divided into a carotid plaque group (n=475) and a non-carotid plaque group (n=257)...
May 26, 2017: Thrombosis Research
https://www.readbyqxmd.com/read/28581398/ascende-rt-an-analysis-of-health-related-quality-of-life-for-a-randomized-trial-comparing-low-dose-rate-brachytherapy-boost-with-dose-escalated-external-beam-boost-for-high-and-intermediate-risk-prostate-cancer
#4
Sree Rodda, W James Morris, Jeremy Hamm, Graeme Duncan
PURPOSE: To report the patient-reported health-related quality of life (HR-QoL) outcomes for a multicenter randomized trial evaluating the safety and efficacy of 2 different techniques for dose escalation. METHODS AND MATERIALS: A total of 357 men with intermediate- and high-risk prostate cancer were stratified by risk group and randomized (1:1) to either a dose-escalated external beam (DE-EBRT) boost (n=177) or a low-dose-rate prostate brachytherapy (LDR-PB) boost (n=180) as part of combined modality therapy...
July 1, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28560334/extraordinary-linear-dynamic-range-in-laser-defined-functionalized-graphene-photodetectors
#5
Adolfo De Sanctis, Gareth F Jones, Dominique J Wehenkel, Francisco Bezares, Frank H L Koppens, Monica F Craciun, Saverio Russo
Graphene-based photodetectors have demonstrated mechanical flexibility, large operating bandwidth, and broadband spectral response. However, their linear dynamic range (LDR) is limited by graphene's intrinsic hot-carrier dynamics, which causes deviation from a linear photoresponse at low incident powers. At the same time, multiplication of hot carriers causes the photoactive region to be smeared over distances of a few micrometers, limiting the use of graphene in high-resolution applications. We present a novel method for engineering photoactive junctions in FeCl3-intercalated graphene using laser irradiation...
May 2017: Science Advances
https://www.readbyqxmd.com/read/28558232/transparent-carbon-ultramicroelectrode-arrays-for-the-electrochemical-detection-of-a-bacterial-warfare-toxin-pyocyanin
#6
Janine Elliott, Olja Simoska, Scott Karasik, Jason B Shear, Keith J Stevenson
Pyocyanin is a virulence factor produced as a secondary metabolite by the opportunistic human pathogen, Pseudomonas aeruginosa. Fast and direct detection of pyocyanin is of importance as it could provide important insights regarding P. aeruginosa's virulence mechanisms. Here, we present an electrochemical sensing platform of redox-active pyocyanin using transparent carbon ultramicroelectrode arrays (T-CUAs), which were made using a previously reported simple fabrication process ( Duay et al. Anal. Chem. 2015 , 87 , 10109 )...
June 7, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28515807/external-validation-of-the-procars-nomograms-and-comparison-of-existing-risk-stratification-tools-for-localized-prostate-cancer
#7
David Tiberi, George Rodrigues, Tom Pickles, Jim Morris, Juanita Crook, Andre-Guy Martin, Fabio Cury, Charles Catton, Himu Lukka, Andrew Warner, Daniel Taussky
INTRODUCTION: The purpose of this study was to perform a direct comparison of several existing risk-stratification tools for localized prostate cancer in terms of their ability to predict for biochemical failure-free survival (BFFS). Two large databases were used and an external validation of two recently developed nomograms on an independent cohort was also performed in this analysis. METHODS: Patients who were treated with external beam radiotherapy (EBRT) and/or brachytherapy for localized prostate cancer were selected from the multi-institutional Genitourinary Radiation Oncologists of Canada (GUROC) Prostate Cancer Risk Stratification (ProCaRS) database (n=7974) and the Centre Hospitalier de l'Université de Montréal (CHUM) validation database (n=2266)...
March 2017: Canadian Urological Association Journal, Journal de L'Association des Urologues du Canada
https://www.readbyqxmd.com/read/28501161/fabrication-of-selective-chemical-sensor-with-ternary-zno-sno2-yb2o3-nanoparticles
#8
Mohammed M Rahman, M M Alam, Abdullah M Asiri, M A Islam
Construction of highly efficient toxic chemical sensors is the key approach for the determination of carcinogenic chemicals in the environment and ecosystem. We report here, an efficient acetone chemical sensor based on the analytical performances such as sensitivity, lower-detection limit, reproducibility, and good linearity. The proposed acetone-detecting electrode was introduced by the implementation of ZnO/SnO2/Yb2O3 nanoparticles (NPs) as a successful electron mediator with glassy carbon electrode (GCE) assembly...
August 1, 2017: Talanta
https://www.readbyqxmd.com/read/28496973/8-styryl-substituted-coralyne-derivatives-as-dna-binding-fluorescent-probes
#9
P M Pithan, D Decker, S I Druzhinin, H Ihmels, H Schönherr, Y Voß
Six new 8-styryl-substituted coralyne derivatives 4a-f were synthesized from coralyne (2) by a base catalysed Knoevenagel type reaction. It was shown by photometric and fluorimetric titrations of double stranded and quadruplex DNA to 4b-d as well as by fluorimetric DNA denaturation experiments that these ligands bind to DNA with different binding modes at varying ligand-DNA ratios (LDR). Specifically, the addition of DNA caused initially a hypochromic effect in absorbance and, at a particular LDR, the development of a new red shifted absorption band with a hyperchromic effect...
February 8, 2017: RSC Advances
https://www.readbyqxmd.com/read/28495442/validation-of-plastic-scintillation-detectors-for-applications-in-low-dose-rate-brachytherapy
#10
François Therriault-Proulx, Luc Beaulieu, Sam Beddar
PURPOSE: To develop a plastic scintillation detector (PSD) capable of accurately measuring dose around a low-dose-rate (LDR) iodine-125 ((125)I) radioactive seed as a first step toward in vivo dosimetry for prostate LDR brachytherapy. METHODS: Using a GEANT4 based Monte Carlo code, photon energy distribution at any position around a realistic (125)I source model was obtained. This energy distribution was convolved with the expected energy response from a plastic scintillator and dosimetry accuracy was evaluated...
May 8, 2017: Brachytherapy
https://www.readbyqxmd.com/read/28488030/-125-i%C3%A2-brachytherapy-in-younger-prostate-cancer-patients-outcomes-in-low-and-intermediate-risk-disease
#11
Isabelle Kindts, Karin Stellamans, Ignace Billiet, Hans Pottel, Antoon Lambrecht
PURPOSE: To evaluate local recurrence in younger men treated with low-dose-rate (LDR) (125)I brachytherapy (BT) for localized prostate cancer. PATIENTS AND METHODS: A total of 192 patients (≤65-years-old) were treated with LDR (125)I-BT ± hormone therapy. Local failure was defined as any prostate-specific antigen (PSA) rise leading to salvage treatment or biochemical failure according to the Phoenix definition. A bounce was defined as a rise in the nadir of ≥0...
May 9, 2017: Strahlentherapie und Onkologie: Organ der Deutschen Röntgengesellschaft ... [et Al]
https://www.readbyqxmd.com/read/28469796/low-dose-radiation-modulates-human-mesenchymal-stem-cell-proliferation-through-regulating-cdk-and-rb
#12
Lei Yang, Ziling Liu, Chen Chen, Xiaofeng Cong, Zhi Li, Shasha Zhao, Meng Ren
Low-dose radiation (LDR) has been known to stimulate cell proliferation. The effect of LDR on human bone marrow mesenchymal stem cells (BMSCs), however, remains to be determined. The current study, therefore, aimed to investigate the effect of LDR on human BMSC proliferation and its mechanisms. To accomplish this, human BMSCs were isolated from ribs and cultured with or without exposition to LDR (75 mGy) for 24 h. Cell proliferation was assessed by MTT assay, the cytokines secreted by the BMSCs were quantified by ELISA, and the proteins associated with cell proliferation and cell cycle were evaluated by immunoblot analysis...
2017: American Journal of Translational Research
https://www.readbyqxmd.com/read/28464458/highly-sensitive-and-broadband-organic-photodetectors-with-fast-speed-gain-and-large-linear-dynamic-range-at-low-forward-bias
#13
Riming Nie, Xianyu Deng, Lei Feng, Guiguang Hu, Yangyang Wang, Gang Yu, Jianbin Xu
Photodetectors with high photoelectronic gain generally require a high negative working voltage and a very low environment temperature. They also exhibit low response speed and narrow linear dynamic range (LDR). Here, an organic photodiode is demonstrated, which shows a large amount of photon to electron multiplication at room temperature with highest external quantum efficiency (EQE) from ultraviolet (UV) to near-infrared region of 5.02 × 10(3) % (29.55 A W(-1) ) under a very low positive voltage of 1.0 V, accompanied with a fast response speed and a high LDR from 10(-7) to 10(1) mW cm(-2) ...
June 2017: Small
https://www.readbyqxmd.com/read/28456797/identification-of-two-additional-susceptibility-loci-for-inflammatory-bowel-disease-in-a-chinese-population
#14
Xiucai Lan, Xiuhua Lan, Ying Chang, Xiaomin Zhang, Jing Liu, Vikash Vikash, Wei Wang, Meifang Huang, Xiaobing Wang, Feng Zhou, Liping Chen, Qiu Zhao
BACKGROUND/AIMS: To investigate the associations between the rs1250569 (zinc finger MIZ-type containing 1, ZMIZ1), rs1042522 (tumour protein p53, TP53), and rs10114470 (tumour necrosis factor-like cytokine 1A, TL1A) polymorphisms and the development of inflammatory bowel disease (IBD) in a Chinese (Han) population. We analysed the expression of genes that predispose patients to Crohn's disease (CD) and ulcerative colitis (UC). METHODS: A total of 381 IBD patients and 517 healthy controls were recruited into our study...
2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28433432/ascende-rt-an-analysis-of-treatment-related-morbidity-for-a-randomized-trial-comparing-a-low-dose-rate-brachytherapy-boost-with-a-dose-escalated-external-beam-boost-for-high-and-intermediate-risk-prostate-cancer
#15
Sree Rodda, Scott Tyldesley, W James Morris, Mira Keyes, Ross Halperin, Howard Pai, Michael McKenzie, Graeme Duncan, Gerard Morton, Jeremy Hamm, Nevin Murray
PURPOSE: To report the genitourinary (GU) and gastrointestinal (GI) morbidity and erectile dysfunction in a randomized trial comparing 2 methods of dose escalation for high- and intermediate-risk prostate cancer. METHODS AND MATERIALS: ASCENDE-RT (Androgen Suppression Combined with Elective Nodal and Dose Escalated Radiation Therapy) enrolled 398 men, median age 68 years, who were then randomized to either a standard arm that included 12 months of androgen deprivation therapy and pelvic irradiation to 46 Gy followed by a dose-escalated external beam radiation therapy (DE-EBRT) boost to 78 Gy, or an experimental arm that substituted a low-dose-rate prostate brachytherapy (LDR-PB) boost...
January 6, 2017: International Journal of Radiation Oncology, Biology, Physics
https://www.readbyqxmd.com/read/28421857/risk-of-solid-cancer-in-low-dose-rate-radiation-epidemiological-studies-and-the-dose-rate-effectiveness-factor
#16
Roy Shore, Linda Walsh, Tamara Azizova, Werner Rühm
PURPOSE: Estimated radiation risks used for radiation protection purposes have been based primarily on the Life Span Study (LSS) of atomic bomb survivors who received brief exposures at high dose rates, many with high doses. Information is needed regarding radiation risks from low dose-rate (LDR) exposures to low linear-energy-transfer (low-LET) radiation. We conducted a meta-analysis of LDR epidemiologic studies that provide dose-response estimates of total solid cancer risk in adulthood in comparison to corresponding LSS risks, in order to estimate a dose rate effectiveness factor (DREF)...
May 15, 2017: International Journal of Radiation Biology
https://www.readbyqxmd.com/read/28420811/the-t-allele-of-rs8075977-in-the-5-flanking-region-of-the-pedf-gene-is-associated-with-reduced-risk-of-coronary-artery-disease-in-elderly-chinese-men
#17
Shou-Yuan Ma, Yuan-Yuan Guo, Shu-Xia Wang, Jin-Xin Shi, Jie Liu, Jian-Feng Liu, Ping Zhu
Coronary artery disease (CAD) is a multifactorial disease with a genetic component. Pigment epithelium-derived factor (PEDF) exerts anti-inflammatory, anti-oxidant, anti-thrombotic, and anti-angiogenic effects and thus has received increasing attention as a sensitive biomarker of atherosclerosis and CAD. To explore the potential association between PEDF single nucleotide polymorphisms (SNPs) and CAD, we performed this case-control study of consecutive elderly Chinese Han male patients (n = 416) and age-matched male controls (n = 528) without a history of CAD or electrocardiographic signs of CAD...
April 2017: Tohoku Journal of Experimental Medicine
https://www.readbyqxmd.com/read/28395211/antioxidant-and-antiapoptotic-effects-of-sea-cucumber-and-valsartan-against-doxorubicin-induced-cardiotoxicity-in-rats-the-role-of-low-dose-gamma-irradiation
#18
Doaa M Ibrahim, Rasha R Radwan, Salma M Abdel Fattah
Doxorubicin (DOX) is a highly effective antineoplastic drug; however, the clinical use of DOX is limited by its dose dependent cardiotoxicity. This study was conducted to evaluate the cardioprotective effect of sea cucumber and valsartan against DOX-induced cardiotoxicity in rats. Also, the role of exposure to low dose γ radiation (LDR) on each of them was investigated, since LDR could suppress various reactive oxygen species-related diseases. Rats received DOX (2.5mg/kg, ip) in six equal injections over a period of 2weeks, sea cucumber (14...
May 2017: Journal of Photochemistry and Photobiology. B, Biology
https://www.readbyqxmd.com/read/28392750/action-learning-in-virtual-higher-education-applying-leadership-theory
#19
Joseph Curtin
This paper reports the historical foundation of Northeastern University's course, LDR 6100: Developing Your Leadership Capability, a partial literature review of action learning (AL) and virtual action learning (VAL), a course methodology of LDR 6100 requiring students to apply leadership perspectives using VAL as instructed by the author, questionnaire and survey results of students who evaluated the effectiveness of their application of leadership theories using VAL and insights believed to have been gained by the author administering VAL...
May 3, 2016: Action learning
https://www.readbyqxmd.com/read/28391989/towards-clinical-application-of-raystretch-for-heterogeneity-corrections-in-ldr-permanent-125-i-prostate-brachytherapy
#20
Fernando Hueso-González, Facundo Ballester, Jose Perez-Calatayud, Frank-André Siebert, Javier Vijande
PURPOSE: RayStretch is a simple algorithm proposed for heterogeneity corrections in low-dose-rate brachytherapy. It is built on top of TG-43 consensus data, and it has been validated with Monte Carlo (MC) simulations. In this study, we take a real clinical prostate implant with 71 (125)I seeds as reference and we apply RayStretch to analyze its performance in worst-case scenarios. METHODS AND MATERIALS: To do so, we design two cases where large calcifications are located in the prostate lobules...
May 2017: Brachytherapy
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