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https://www.readbyqxmd.com/read/28820971/ultrasensitive-detection-of-ag-i-based-on-the-conformational-switching-of-a-multifunctional-aptamer-probe-induced-by-silver-i
#1
Yu-Feng Zhu, Yong-Sheng Wang, Bin Zhou, Yan-Qin Huang, Xue-Jiao Li, Si-Han Chen, Xiao-Feng Wang, Xian Tang
We for the first time confirmed that the low concentrations of Ag(I) could induce a silver specific aptamer probe (SAP) from a random coil sequence form to G-quadruplex structure. Thereby, a novel highly sensitive fluorescence strategy for silver(I) assay was established. The designed multifunctional SAP could act as a recognition element for Ag(I) and a signal reporter. The use of such a SAP can ultrasensitively and selectively detect Ag(I), giving a detection limit down to 0.64nM. This is much lower than those reported by related literatures...
August 10, 2017: Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy
https://www.readbyqxmd.com/read/28820902/from-hospitalization-records-to-surveillance-the-use-of-local-patient-profiles-to-characterize-cholera-in-vellore-india
#2
Melissa S Cruz, Tania M AlarconFalconi, Meghan A Hartwick, Aishwarya Venkat, Hanna Y Ehrlich, Shalini Anandan, Honorine D Ward, Balaji Veeraraghavan, Elena N Naumova
Despite availability of high quality medical records, health care systems often do not have the resources or tools to utilize these data efficiently. Yet, hospital-based, laboratory-confirmed records may pave the way for building reliable surveillance systems capable of monitoring temporal trends of emerging infections. In this communication, we present a new tool to compress and visualize medical records with a local population profile (LPP) approach, which transforms information into statistically comparable patterns...
2017: PloS One
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/28820689/reliability-of-diagnostic-criteria-for-neurocysticercosis-for-patients-with-ventricular-cystic-lesions-or-granulomas-a-systematic-review
#4
Javier A Bustos, Hector H García, Oscar H Del Brutto
Intraventricular neurocysticercosis (NCC) is a severe form of NCC requiring prompt diagnosis and treatment. We aimed to assess the reliability of the most recent version of diagnostic criteria for this form of NCC. Two systematic literature reviews were performed; one included case reports of patients with intraventricular cysticercosis and the other included case reports of patients with intraventricular cystic lesions or granulomas caused by infections other than NCC. All assessed cases were categorized according to the last revision of the long-standing Del Brutto's set of diagnostic criteria to determine its sensitivity, specificity, and predictive value for this form of NCC...
July 31, 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28820478/detection-of-interactions-between-proteins-by-using-legendre-moments-descriptor-to-extract-discriminatory-information-embedded-in-pssm
#5
Yan-Bin Wang, Zhu-Hong You, Li-Ping Li, Yu-An Huang, Hai-Cheng Yi
Protein-protein interactions (PPIs) play a very large part in most cellular processes. Although a great deal of research has been devoted to detecting PPIs through high-throughput technologies, these methods are clearly expensive and cumbersome. Compared with the traditional experimental methods, computational methods have attracted much attention because of their good performance in detecting PPIs. In our work, a novel computational method named as PCVM-LM is proposed which combines the probabilistic classification vector machine (PCVM) model and Legendre moments (LMs) to predict PPIs from amino acid sequences...
August 18, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28820444/a-novel-partial-discharge-localization-method-in-substation-based-on-a-wireless-uhf-sensor-array
#6
Zhen Li, Lingen Luo, Nan Zhou, Gehao Sheng, Xiuchen Jiang
Effective Partial Discharge (PD) localization can detect the insulation problems of the power equipment in a substation and improve the reliability of power systems. Typical Ultra-High Frequency (UHF) PD localization methods are mainly based on time difference information, which need a high sampling rate system. This paper proposes a novel PD localization method based on a received signal strength indicator (RSSI) fingerprint to quickly locate the power equipment with potential insulation defects. The proposed method consists of two stages...
August 18, 2017: Sensors
https://www.readbyqxmd.com/read/28820349/evaluation-of-different-methods-for-dna-extraction-from-human-burnt-bones-and-the-generation-of-genetic-profiles-for-identification
#7
Anum Uzair, Nouman Rasool, Muhammad Wasim
Bone exposure to heat in the presence of moisture breaks the phosphodiester bonds of the backbone, leaving sheared DNA in bone cells. This also limits the possibility of generating a complete profile of the victim. With the increasing incidence of fire outbreaks over the past few years, a paradigm shift to establish identity has been observed, from morphological identification of victims to STR profiling. For this study, 10 bone samples were taken from burnt human bodies that were recovered from different fire outbreak scenes...
January 1, 2017: Medicine, Science, and the Law
https://www.readbyqxmd.com/read/28820013/diagnostic-performance-of-central-vein-sign-for-multiple-sclerosis-with-a-simplified-three-lesion-algorithm
#8
Andrew J Solomon, Richard Watts, Daniel Ontaneda, Martina Absinta, Pascal Sati, Daniel S Reich
BACKGROUND: Detection of a "central vein sign" (CVS) on FLAIR* magnetic resonance imaging (MRI) is highly specific and sensitive for multiple sclerosis (MS). We evaluated the specificity and sensitivity of simplified CVS algorithms for MS diagnosis. METHODS: MRIs from 10 participants with MS without additional comorbidities for MRI white matter abnormalities; 10 with MS and additional comorbidities for white matter abnormalities; 10 with migraine, white matter abnormalities, and no additional comorbidities; and 10 who had previously been erroneously diagnosed with MS were evaluated...
August 1, 2017: Multiple Sclerosis: Clinical and Laboratory Research
https://www.readbyqxmd.com/read/28820012/effect-of-rotational-prosthetic-alignment-variation-on-tibiofemoral-contact-pressure-distribution-and-joint-kinematics-in-total-knee-replacement
#9
Xin Xie, Roy Rusly, John D DesJardins, Frank Voss, Kim Chillag, Martine LaBerge
In total knee replacement surgery, implant alignment is one of the most important criteria for successful long-term clinical outcome. During total knee replacement implantation, femoral and tibial alignment are determined through appropriate bone resections, which could vary based on patient anatomy, implant design and surgical technique and further influence loading conditions and clinical outcomes. The current research focused on three critical alignment parameters for total knee replacement insertion: femoral component internal/external (I/E) rotation, varus-valgus tibiofemoral angulation and posterior tibial slope...
August 1, 2017: Proceedings of the Institution of Mechanical Engineers. Part H, Journal of Engineering in Medicine
https://www.readbyqxmd.com/read/28819981/highly-efficient-guiding-of-motile-microtubules-on-non-topographical-motor-patterns
#10
Cordula Reuther, Matthäus Mittasch, Sundar Naganathan, Stephan Grill, Stefan Diez
Molecular motors, highly-efficient biological nano-machines, hold the potential to be employed for a wide range of nanotechnological applications. Towards this end, kinesin, dynein or myosin motor proteins are commonly surface-immobilized within engineered environments in order to transport cargo attached to cytoskeletal filaments. Being able to flexibly control the direction of filament motion - in particular on planar, non-topographical surfaces - has, however, remained challenging. Here, we demonstrate the applicability of a UV-laser-based ablation technique to programmably generate highly-localized patterns of functional kinesin-1 motors with different shapes and sizes on PLL-g-PEG-coated polystyrene surfaces...
August 18, 2017: Nano Letters
https://www.readbyqxmd.com/read/28819966/characterization-of-nanopipet-supported-ities-tips-for-scanning-electrochemical-microscopy-of-single-solid-state-nanopores
#11
Ran Chen, Ryan James Balla, Alex Lima, Shigeru Amemiya
Nanoscale scanning electrochemical microscopy (SECM) is a powerful scanning probe technique that enables high-resolution imaging of chemical processes at single nanometer-sized objects. However, it has been a challenging task to quantitatively understand nanoscale SECM images, which requires to accurately characterize the size and geometry of nanoelectrode tips. Herein, we address this challenge through transmission electron microscopy (TEM) of quartz nanopipets for SECM imaging of single solid-state nanopores by using nanopipet-supported interfaces between two immiscible electrolyte solutions (ITIES) as tips...
August 18, 2017: Analytical Chemistry
https://www.readbyqxmd.com/read/28819928/development-of-a-rating-tool-for-mobile-cancer-apps-information-analysis-and-formal-and-content-related-evaluation-of-selected-cancer-apps
#12
Cathleen Böhme, Marc Baron von Osthoff, Katrin Frey, Jutta Hübner
Mobile apps are offered in large numbers and have different qualities. The aim of this article was to develop a rating tool based on formal and content-related criteria for the assessment of cancer apps and to test its applicability on apps. After a thorough analysis of the literature, we developed a specific rating tool for cancer apps based on the MARS (mobile app rating system) and a rating tool for cancer websites. This instrument was applied to apps freely available in stores and focusing on some cancer topic...
August 17, 2017: Journal of Cancer Education: the Official Journal of the American Association for Cancer Education
https://www.readbyqxmd.com/read/28819803/if-at-first-you-don-t-succeed%C3%A2-%C3%A2-adoption-of-ipad-marking-for-high-stakes-assessments
#13
Terry Judd, Anna Ryan, Eleanor Flynn, Geoff McColl
Large-scale interview and simulation-based assessments such as objective structured clinical examinations (OSCEs) and multiple mini interviews (MMIs) are logistically complex to administer, generate large volumes of assessment data, and are strong candidates for the adoption of computer-based marking systems. Adoption of new technologies can be challenging, and technical failures, which are relatively commonplace, can delay and/or create resistance to ongoing implementation.This paper reports on the adoption process of an electronic marking system for OSCEs and MMIs following an unsuccessful initial trial...
August 17, 2017: Perspectives on Medical Education
https://www.readbyqxmd.com/read/28819581/electrochemical-evaluation-of-trans-resveratrol-levels-in-red-wine-based-on-the-interaction-between-resveratrol-and-graphene
#14
Lantao Liu, Yanli Zhou, Yiyu Kang, Haihong Huang, Congming Li, Maotian Xu, Baoxian Ye
trans-Resveratrol is often considered as one of the quality standards of red wine, and the development of a sensitive and reliable method for monitoring the trans-resveratrol levels in red wine is an urgent requirement for the quality control. Here, a novel voltammetric approach was described for probing trans-resveratrol using a graphene-modified glassy carbon (GC) electrode. The proposed electrode was prepared by one-step electrodeposition of reduced graphene oxide (ERGO) at a GC electrode. Compared with the bare GC electrode, the introduced graphene film on the electrode surface dramatically improved the sensitivity of the sensor response due to the π-π interaction between the graphene and trans-resveratrol...
2017: Journal of Analytical Methods in Chemistry
https://www.readbyqxmd.com/read/28819359/screening-for-cushing-syndrome-at-the-primary-care-level-what-every-general-practitioner-must-know
#15
REVIEW
Ernest Yorke, Yacoba Atiase, Josephine Akpalu, Osei Sarfo-Kantanka
Cushing's syndrome is a rare entity, and a high index of suspicion is needed for screening in a primary care setting. The clinical awareness of the primary care physician (PCP) to the highly indicative signs and symptoms such as facial plethora, proximal myopathy, reddish purple striae, and easy bruisability should alert him to look for biochemical evidence of Cushing's syndrome through any of the first-line screening tests, namely, 24-hour urinary free cortisol, overnight dexamethasone suppression test, or late-night salivary cortisol...
2017: International Journal of Endocrinology
https://www.readbyqxmd.com/read/28819341/reliability-of-the-acetabular-reconstruction-technique-using-autogenous-bone-graft-from-resected-femoral-head-in-hip-dysplasia-influence-of-the-change-of-hip-joint-center-on-clinical-outcome
#16
Joo Ho Song, Tae Soo Ahn, Pil Whan Yoon, Jae Suk Chang
INTRODUCTION: The previous studies have not reached on consensus as to the outcome of acetabular reconstruction with autogenous bone graft for dysplastic hips, especially in severe cases such as Crowe type IV. The current study aimed to determine the survivorship of the arthroplasty and the grafts as well as the change of hip joint center averagely 9.8 years (range, 5-19) after cementless total hip arthroplasty. MATERIALS AND METHODS: We reviewed 52 cases including 19 cases of complete hip dislocation of which acetabular defects were augmented with autogenous bone grafts taken from the resected femoral heads...
December 2017: Journal of Orthopaedics
https://www.readbyqxmd.com/read/28819323/excessive-body-fat-linked-to-blunted-somatosensory-cortex-response-to-general-reward-in-adolescents
#17
J F Navas, A Barros-Loscertales, V Costumero-Ramos, J Verdejo-Román, R Vilar-López, A Verdejo-García
BACKGROUND AND AIMS: The brain reward system is key to understanding adolescent obesity in the current obesogenic environment, rich in highly appetising stimuli, to which adolescents are particularly sensitive. We aimed to examine the association between body fat levels and brain reward system responsivity to general (monetary) rewards in male and female adolescents. METHOD: Sixty-eight adolescents (34 females; mean age [standard deviation]=16.56 [1.35]) were measured for body fat levels with bioelectric impedance, and underwent a functional magnetic resonance imaging (fMRI) scan during the Monetary Incentive Delay (MID) task...
August 18, 2017: International Journal of Obesity: Journal of the International Association for the Study of Obesity
https://www.readbyqxmd.com/read/28819184/black-phosphorus-ink-formulation-for-inkjet-printing-of-optoelectronics-and-photonics
#18
Guohua Hu, Tom Albrow-Owen, Xinxin Jin, Ayaz Ali, Yuwei Hu, Richard C T Howe, Khurram Shehzad, Zongyin Yang, Xuekun Zhu, Robert I Woodward, Tien-Chun Wu, Henri Jussila, Jiang-Bin Wu, Peng Peng, Ping-Heng Tan, Zhipei Sun, Edmund J R Kelleher, Meng Zhang, Yang Xu, Tawfique Hasan
Black phosphorus is a two-dimensional material of great interest, in part because of its high carrier mobility and thickness dependent direct bandgap. However, its instability under ambient conditions limits material deposition options for device fabrication. Here we show a black phosphorus ink that can be reliably inkjet printed, enabling scalable development of optoelectronic and photonic devices. Our binder-free ink suppresses coffee ring formation through induced recirculating Marangoni flow, and supports excellent consistency (< 2% variation) and spatial uniformity (< 3...
August 17, 2017: Nature Communications
https://www.readbyqxmd.com/read/28819053/novel-neurobiological-properties-of-elements-in-the-escape-circuitry-of-the-shrimp
#19
De Forest Mellon
Escape behaviors in peneid shrimp are mediated by large myelinated medial giant fibers which course from the brain to the last abdominal ganglion in the ventral nerve cord. In each abdominal segment the medial giant axons make synaptic connections with paired myelinated giant motor axons that excite the abdominal deep flexor muscles and drive the tailflips that constitute the escape behavior. I examined 1) anatomical features of the abdominal motor giant fibers and 2) electrical properties of both the medial giants and motor giants in the pink shrimp, Farfantepenaeus duoarum...
August 17, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28819018/adjuvant-treatment-of-anogenital-warts-with-systemic-interferon-a-systematic-review-and-meta-analysis
#20
Lukas Westfechtel, Ricardo Niklas Werner, Corinna Dressler, Matthew Gaskins, Alexander Nast
BACKGROUND: Interferons are natural messenger proteins that are used to treat various disease entities. Due to their immunomodulating, antiviral and antiproliferative effects, the systemic administration of interferons after ablative treatment for anogenital warts (AGWs) has been advocated to increase clearance and decrease recurrence rates. However, studies investigating the efficacy of adjuvant systemic interferon have yielded inconsistent results. The objective of this systematic review and meta-analysis was to comprehensively assess and evaluate the available evidence from randomised controlled trials...
August 17, 2017: Sexually Transmitted Infections
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