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https://www.readbyqxmd.com/read/28822304/a-flow-through-elevated-temperature-and-pressure-nmr-apparatus-for-in-situ-co2-sequestration-studies
#1
Erika L Sesti, Jinlei Cui, Sophia E Hayes, Mark S Conradi
We report an apparatus for in-situ nuclear magnetic resonance (NMR) studies of chemical reactions of dissolved (13)CO2 with minerals (rock or powder) under continuous flow. The operating range of the apparatus is 18-150°C and 1-140bar. A flow pump is used to circulate a CO2-water solution, with a heated mixing vessel where CO2 gas equilibrates with a water solution. The NMR probe is built around a strong zirconia ceramic vessel, with o-ring sealed connections; the mineral is contained inside. The horizontal orientation of the zirconia vessels allows use of a radio frequency (rf) solenoid for improved spin sensitivity...
August 12, 2017: Journal of Magnetic Resonance
https://www.readbyqxmd.com/read/28822215/family-emergency-plan-and-preparedness-among-medical-practitioners-in-zaria-nigeria
#2
Jerry Godfrey Makama, Istifanus Anekoson Joshua, Elizabeth Jerry Makama
BACKGROUND: There has been an increase in the incidence of disasters in many parts of the world. Similarly, Nigeria has witnessed a recent increase of man-made disaster events such as plane crash, fire incidents, flood, and building collapse, including bomb blast orchestrated by terrorists that often create emergency situations. Therefore, the aim of the study was to evaluate family emergency plan and preparedness among medical practitioners in Zaria. METHODS: This was a cross-sectional descriptive study (May-July, 2013) of medical practitioners in Zaria, Nigeria...
January 2017: American Journal of Disaster Medicine
https://www.readbyqxmd.com/read/28820890/history-based-forward-and-feedback-mechanism-in-cooperative-spectrum-sensing-including-malicious-users-in-cognitive-radio-network
#3
Noor Gul, Ijaz Mansoor Qureshi, Adnan Omar, Atif Elahi, Sajjad Khan
In cognitive radio communication, spectrum sensing plays a vital role in sensing the existence of the primary user (PU). The sensing performance is badly affected by fading and shadowing in case of single secondary user(SU). To overcome this issue, cooperative spectrum sensing (CSS) is proposed. Although the reliability of the system is improved with cooperation but existence of malicious user (MU) in the CSS deteriorates the performance. In this work, we consider the Kullback-Leibler (KL) divergence method for minimizing spectrum sensing data falsification (SSDF) attack...
2017: PloS One
https://www.readbyqxmd.com/read/28820477/lora-mobile-to-base-station-channel-characterization-in-the-antarctic
#4
Johnny Gaelens, Patrick Van Torre, Jo Verhaevert, Hendrik Rogier
Antarctic conditions demand that wireless sensor nodes are operational all year round and that they provide a large communication range of several tens of kilometers. LoRa technology operating in sub-GHz frequency bands implements these wireless links with minimal power consumption. The employed chirp spread spectrum modulation provides a large link budget, combined with the excellent radio-wave propagation characteristics in these bands. In this paper, an experimental wireless link from a mobile vehicle which transmits sensor data to a base station is measured and analyzed in terms of signal-to-noise ratio and packet loss...
August 18, 2017: Sensors
https://www.readbyqxmd.com/read/28820462/wettability-investigations-and-wet-transfer-enhancement-of-large-area-cvd-graphene-on-aluminum-nitride
#5
Marius Knapp, René Hoffmann, Volker Cimalla, Oliver Ambacher
The two-dimensional and virtually massless character of graphene attracts great interest for radio frequency devices, such as surface and bulk acoustic wave resonators. Due to its good electric conductivity, graphene might be an alternative as a virtually massless electrode by improving resonator performance regarding mass-loading effects. We report on an optimization of the commonly used wet transfer technique for large-area graphene, grown via chemical vapor deposition, onto aluminum nitride (AlN), which is mainly used as an active, piezoelectric material for acoustic devices...
August 18, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28820390/small-molecule-inhibitors-of-dna-pk-for-tumor-sensitization-to-anticancer-therapy
#6
M Pospisilova, M Seifrtova, M Rezacova
The most sensitive cell structure - a DNA molecule, is the common target of cancer therapy. DNA damage response (controlled by enzymes from the phosphatidylinositol 3-kinase-related kinases family - PIKK) presents many encouraging targets for improving both conventional cytotoxic anticancer therapy and individualized monotherapy. DNA-dependent protein kinase (DNA-PK) is a member of the PIKK superfamily and plays an important role in the detection and repair of DNA double-strand breaks via the non-homologous end-joining pathway...
June 2017: Journal of Physiology and Pharmacology: An Official Journal of the Polish Physiological Society
https://www.readbyqxmd.com/read/28819829/surgical-treatment-for-symptomatic-non-ossifying-fibromas-of-the-lower-extremity-with-calcium-sulfate-grafts-in-skeletally-immature-patients
#7
Antonio Andreacchio, Flavia Alberghina, Gianluca Testa, Federico Canavese
BACKGROUND: Non-ossifying fibromas (NOFs) are common benign bone lesions found in children and adolescents. They usually involve metaphysis of long bones, tend to gradually disappear with age and usually do not require surgery, while they are not associated with pathological fractures. The aim of this study was to evaluate the outcome and efficacy of a single-stage procedure, comprising curettage of the lesion and calcium sulfate pellet (CaSP) grafting, in skeletally immature patients with large, symptomatic NOF of the lower extremity, and the possible limitations of the procedure...
August 17, 2017: European Journal of Orthopaedic Surgery & Traumatology: Orthopédie Traumatologie
https://www.readbyqxmd.com/read/28819511/male-partner-involvement-in-the-prevention-of-mother-to-child-transmission-of-hiv-infection-in-mwanza-region-tanzania
#8
Munda Elias, Elia John Mmbaga, Ahmed Abade Mohamed, Rogath Saika Kishimba
INTRODUCTION: Globally, there are 3.3 million children < 15 years of age living with HIV infection. About 95% of HIV infected children have acquired infection from their mothers. Although new pediatric HIV infection in Tanzania has declined by 48% and Prevention of Mother to Child Transmission (PMTCT) coverage of highly active anti-retroviral therapy (HAART) has increased to 77%, the MTCT rate remains high (15%). Poor male partner involvement in PMTCT services is one of the factors contributing to reduced effectiveness of the PMTCT and hence failure to achieve the elimination of maternal to child transmission of HIV...
2017: Pan African Medical Journal
https://www.readbyqxmd.com/read/28819291/a-single-molecule-assessment-of-the-protective-effect-of-dmso-against-dna-double-strand-breaks-induced-by-photo-and-%C3%AE-ray-irradiation-and-freezing
#9
Masami Noda, Yue Ma, Yuko Yoshikawa, Tadayuki Imanaka, Toshiaki Mori, Masakazu Furuta, Tatsuaki Tsuruyama, Kenichi Yoshikawa
Dimethyl sulfoxide (DMSO) is widely used as a cryoprotectant for organs, tissues, and cell suspension in storage. In addition, DMSO is known to be a useful free radical scavenger and a radio-protectant. To date, many in vitro assays using cultured cells have been performed for analysing the protective effect of DMSO against genomic DNA damage; however, currently it has been rather difficult to detect DNA double strand breaks (DSBs) in a quantitative manner. In the present study, we aimed to observe the extent of DNA damage by use of single molecular observation with a fluorescence microscope to evaluate DSBs induced by photo- and γ-ray-irradiation, or freeze/thawing in variable concentrations of DMSO...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818489/tu-salud-%C3%A2-s%C3%A3-cuenta-your-health-matters-a%C3%A2-community-wide-campaign-in-a-hispanic-border%C3%A2-community-in-texas
#10
Natalia I Heredia, MinJae Lee, Lisa Mitchell-Bennett, Belinda M Reininger
OBJECTIVE: To evaluate a community-wide campaign, Tu Salud ¡Si Cuenta! (TSSC), in improving eating behaviors and anthropometric outcomes in Hispanic border communities. DESIGN: A quasi-experimental study with matched intervention and comparison communities. Cross-sectional assessments with randomly sampled adults, examined by actual exposure and site (unexposed intervention, exposed intervention, and unexposed comparison). SETTING AND PARTICIPANTS: Predominately Mexican Americans located in Brownsville, TX (intervention) and Laredo, TX (control)...
August 14, 2017: Journal of Nutrition Education and Behavior
https://www.readbyqxmd.com/read/28818412/are-extramedian-symptoms-associated-with-peripheral-causes-in-patient-with-carpal-tunnel-syndrome-electrodiagnostic-and-ultrasonographic-study
#11
Basak Mansiz-Kaplan, Merve Akdeniz-Leblecicier, Ilker Yagci
OBJECTIVE: To evaluate the relationship between extramedian spreading of sensorial symptoms and median and ulnar nerve cross-sectional area (CSA) and to compare the ultrasonographic and electrophysiological findings in patients with carpal tunnel syndrome (CTS) with or without extramedian sensory symptoms. DESIGN: Cross-sectional study. MATERIALS AND METHODS: Patients with CTS were divided into two groups as with or without extramedian symptoms and were assessed clinically, electrophysiologically and ultrasonographically by three blind investigators...
August 10, 2017: Journal of Electromyography and Kinesiology
https://www.readbyqxmd.com/read/28818003/hybrid-a-cnh-tio2-tin-type-surface-layers-produced-on-niti-shape-memory-alloy-for-cardiovascular-applications
#12
Justyna Witkowska, Agnieszka Sowińska, Elżbieta Czarnowska, Tomasz Płociński, Janusz Kamiński, Tadeusz Wierzchoń
AIM: The goal was to improve the properties of NiTi shape memory alloy to make it suitable for cardiac applications. For this purpose, a hybrid a-CNH+TiO2+TiN-type surface layer was produced on NiTi alloy and characterized. MATERIALS & METHODS: The NiTi alloy subjected to hybrid process combining low-temperature oxynitriding under glow discharge conditions and radio frequency chemical vapor deposition process was examined for microstructure, surface topography, corrosion resistance, wettability and surface-free energy, Ni ion release and platelets adhesion, aggregation and activation...
August 18, 2017: Nanomedicine
https://www.readbyqxmd.com/read/28817982/current-challenges-in-optimizing-systemic-therapy-for-patients-with-pancreatic-cancer-expert-perspectives-from-the-australian-gastrointestinal-trials-group-with-invited-international-faculty
#13
Eva Segelov, Florian Lordick, David Goldstein, Lorraine A Chantrill, Daniel Croagh, Ben Lawrence, Dirk Arnold, Ian Chau, Radka Obermannova, Timothy Jay Price
Despite recent progress, the outlook for most patients with pancreatic cancer remains poor. There is variation in how patients are managed globally due to differing interpretations of the evidence, partly because studies in this disease are challenging to undertake. This article collates the evidence upon which current best practice is based and offers an expert opinion from an international faculty on how latest developments should influence current treatment paradigms. Areas covered: Optimal chemotherapy for first and subsequent lines of therapy; optimal management of locally advanced, non-metastatic cancer including the role of neoadjuvant chemo(radio)therapy, current evidence for adjuvant chemotherapy, major advances in pancreatic cancer genomics and challenges in supportive care particularly relevant to patients with pancreatic cancer...
August 18, 2017: Expert Review of Anticancer Therapy
https://www.readbyqxmd.com/read/28817070/influence-of-the-distribution-of-tag-ids-on-rfid-memoryless-anti-collision-protocols
#14
Nikola Cmiljanic, Hugo Landaluce, Asier Perallos, Laura Arjona
In recent years, Radio Frequency Identification (RFID) has become very popular. The main feature of this technology is that RFID tags do not require close handling and no line of sight is required between the reader and the tags. RFID is a technology that uses radio frequencies in order to identify tags, which do not need to be positioned accurately relative to the reader. Tags share the communication channel, increasing the likelihood of causing a problem, viz., a message collision. Tree based protocols can resolve these collisions, but require a uniform tag ID distribution...
August 17, 2017: Sensors
https://www.readbyqxmd.com/read/28814090/melatonin-a-hepatoprotective-agent-against-radioiodine-toxicity-in-rats
#15
A M Barlas, M Sadic, H I Atilgan, Y M Bag, A K Onalan, N Yumusak, M Senes, V Fidanci, M R Pekcici, M Korkmaz, K Kismet, G Koca
OBJECTIVES: The aim of the current study was to investigate the possible radioprotective effects of melatonin against hepatic radioiodine (RAI) toxicity. METHODS: Thirty-six rats were randomly divided into three groups: untreated control (Group 1); oral radioiodine (RAI, 111 MBq) administrated rats (Group 2), and melatonin group (oral RAI and daily intraperitoneal injection of 12 mg/kg melatonin-Group 3). In the third group, melatonin administration was started two days before and continued for five days after RAI administration...
2017: Bratislavské Lekárske Listy
https://www.readbyqxmd.com/read/28813624/tp53-mutational-status-and-ros-effect-the-expression-of-the-survivin-associated-radio-adaptive-response
#16
Jeffrey S Murley, Richard C Miller, Ralph R Weichselbaum, David J Grdina
A survivin-associated radio-adaptive response, characterized by increased radiation resistance or sensitization, was induced by exposure to 5 mGy of ionizing radiation and was correlated to the TP53 mutational status of exposed cells. Ten human cancer lines were investigated: colorectal carcinomas HCT116 and RKO [TP53 wild-type (WT)] and their respective TP53 null isogenic lines; breast adenocarcinomas MCF7 (TP53 WT) and MDA-MB-231 (TP53 Mut); lung carcinomas A549 (TP53 WT) and NCI-H1975 (TP53 Mut); and pancreatic carcinomas Hs766T (TP53 WT) and Panc-1 (TP53 Mut)...
August 16, 2017: Radiation Research
https://www.readbyqxmd.com/read/28812923/the-use-of-prophylactic-nunchaku-stents-to-reduce-the-risk-of-nasolacrimal-duct-obstruction-in-patients-with-midfacial-tumours-undergoing-radiotherapy
#17
Valerie A R Juniat, Saul Rajak
The treatment of midfacial tumours with radiotherapy, chemotherapy and radio-iodine can cause nasolacrimal duct fibrosis resulting in epiphora. Nasolacrimal patency can be maintained by stenting. We report our experience of prophylatic Nunchaku stent insertion in 5 patients prior to midfacial radiotherapy. Four out of 5 patients (80%) had patent nasolacrimal ducts without any symptoms of epiphora following removal of the stents. One patient was initially asymptomatic with patent nasolacrimal duct, but subsequently developed epiphora...
August 16, 2017: Orbit
https://www.readbyqxmd.com/read/28812148/local-recurrence-of-squamous-cell-carcinoma-of-the-head-and-neck-after-radio-chemo-therapy-diagnostic-performance-of-fdg-pet-mri-with-diffusion-weighted-sequences
#18
Minerva Becker, Arthur D Varoquaux, Christophe Combescure, Olivier Rager, Marc Pusztaszeri, Karim Burkhardt, Bénédicte M A Delattre, Pavel Dulguerov, Nicolas Dulguerov, Eirini Katirtzidou, Francesca Caparrotti, Osman Ratib, Habib Zaidi, Christoph D Becker
PURPOSE: To determine the diagnostic performance of FDG-PET/MRI with diffusion-weighted imaging (FDG-PET/DWIMRI) for detection and local staging of head and neck squamous cell carcinoma (HNSCC) after radio(chemo)therapy. MATERIALS AND METHODS: This was a prospective study that included 74 consecutive patients with previous radio(chemo)therapy for HNSCC and in whom tumour recurrence or radiation-induced complications were suspected clinically. The patients underwent hybrid PET/MRI examinations with morphological MRI, DWI and FDG-PET...
August 15, 2017: European Radiology
https://www.readbyqxmd.com/read/28812008/evaluation-of-adrenal-function-in-nonhospitalized-patients-with-cirrhosis
#19
Maryam Moini, Mitra Yazdani Sarvestani, Mesbah Shams, Masood Nomovi
BACKGROUND: Patients with cirrhosis and advancing hepatic insufficiency may show various degrees of other organ malfunction, including brain, kidney, and lung. Several studies have also shown a high prevalence of adrenal insufficiency in cirrhotic patients that may cause hemodynamic instability. MATERIALS AND METHODS: In this study we prospectively evaluated adrenal function in a population of nonhospitalized cirrhotic patients. Categorization of liver disease severity was done according to model for end-stage liver disease (MELD) score...
2017: Canadian Journal of Gastroenterology & Hepatology
https://www.readbyqxmd.com/read/28811732/exposure-to-and-use-of-electronic-cigarettes-does-language-matter
#20
Paul Wada, Chun Nok Lam, Elizabeth Burner, Sophie Terp, Michael Menchine, Sanjay Arora
OBJECTIVES: To determine whether patients who are English proficient become aware of e-cigarettes through different marketing tactics and have dissimilar patterns of use than patients who are non-English speaking. DESIGN: This was a cross-sectional study surveying adult English- and Spanish-speaking patients. ANOVA and chi-squared tests were used to examine differences between groups. SETTING: A large public, safety-net hospital in Los Angeles County, California...
2017: Ethnicity & Disease
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