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https://www.readbyqxmd.com/read/28088120/3d-architecture-of-a-graphene-comoo4-composite-for-asymmetric-supercapacitors-usable-at-various-temperatures
#1
Yaru Jiang, Xin Zheng, Xiaoqin Yan, Yong Li, Xuan Zhao, Yue Zhang
Designing and optimizing the electrode materials and studying the electrochemical performance or cycle life of the supercapacitor under different working conditions are crucial to its practical application. Herein, we proposed a rational design of 3D-graphene/CoMoO4 nanoplates by a facile two-step hydrothermal method. Owing to the high electron transfer rate of graphene and the high activity of the CoMoO4 nanoplates, the three-dimensional electrode architectures achieved remarkable electrochemical performances with high areal specific capacitance (1255...
January 5, 2017: Journal of Colloid and Interface Science
https://www.readbyqxmd.com/read/28088064/improved-cognition-while-cycling-in-parkinson-s-disease-patients-and-healthy-adults
#2
Audrey A Hazamy, Lori J P Altmann, Elizabeth Stegemöller, Dawn Bowers, Hyo Keun Lee, Jonathan Wilson, Michael S Okun, Chris J Hass
Persons with Parkinson's disease (PD) are typically more susceptible than healthy adults to impaired performance when two tasks (dual task interference) are performed simultaneously. This limitation has by many experts been attributed to limitations in cognitive resources. Nearly all studies of dual task performance in PD employ walking or balance-based motor tasks, which are commonly impaired in PD. These tasks can be performed using a combination of one or two executive function tasks. The current study examined whether persons with PD would demonstrate greater dual task effects (DTEs) on cognition compared to healthy older adults (HOAs) during a concurrent cycling task...
January 11, 2017: Brain and Cognition
https://www.readbyqxmd.com/read/28087944/laboratory-diagnosis-and-susceptibility-testing-for-mycobacterium-tuberculosis
#3
Gary W Procop
The laboratory, which utilizes some of the most sophisticated and rapidly changing technologies, plays a critical role in the diagnosis of tuberculosis. Some of these tools are being employed in resource-challenged countries for the rapid detection and characterization of Mycobacterium tuberculosis. Foremost, the laboratory defines appropriate specimen criteria for optimal test performance. The direct detection of mycobacteria in the clinical specimen, predominantly done by acid-fast staining, may eventually be replaced by rapid-cycle PCR...
December 2016: Microbiology Spectrum
https://www.readbyqxmd.com/read/28087261/dna-aptamer-probes-for-detection-of-estrogen-receptor-%C3%AE-positive-carcinomas
#4
Arghya Sett, Bibhuti Bhusan Borthakur, Jagannath Dev Sharma, Amal Chandra Kataki, Utpal Bora
Estrogen receptor alpha (ERα) which is a ligand-activated transcription factor also known as NR3A1 (nuclear receptor subfamily 3, group A, member 1). It is an important biomarker for breast cancer metastasis. In the present study, we report a novel DNA aptamer candidate against estrogen receptor (ER) alpha structure. The enriched aptamer candidate was obtained after 14 iterative cycles of in vitro protein-SELEX process. Isothermal calorimetry study suggests the nanomolar sensitivity of the candidate ER_Apt1 to its target protein...
December 25, 2016: Translational Research: the Journal of Laboratory and Clinical Medicine
https://www.readbyqxmd.com/read/28087170/clostridium-difficile-rates-in-asymptomatic-and-symptomatic-hospitalized-patients-using-nucleic-acid-testing
#5
Cynthia Truong, Lee F Schroeder, Rajiv Gaur, Victoria Emma Anikst, Ikuko Komo, Colleen Watters, Erin McCalley, Carole Kulik, David Pickham, Nancy J Lee, Niaz Banaei
BACKGROUND: The Clostridium difficile rate in symptomatic patients represents both those with C. difficile infection (CDI) and those with colonization. To predict the extent of CDI overdiagnosis, we compared the asymptomatic colonization rate to the symptomatic positivity rate in hospitalized patients using nucleic acid testing. METHODS: Between July 2014 and April 2015, formed stool samples were collected from asymptomatic patients after admission to 3 hospital wards at the Stanford Hospital...
January 3, 2017: Diagnostic Microbiology and Infectious Disease
https://www.readbyqxmd.com/read/28087143/contribution-of-age-to-clinical-trial-enrollment-and-tolerance-with-ovarian-cancer
#6
Jessica Gillen, Camille Gunderson, Molly Greenwade, Michelle Rowland, Rachel Ruskin, Kai Ding, Aleia Crim, Adam Walter, Emily White, Kathleen Moore
INTRODUCTION: Increasing age has been correlated with shorter survival in ovarian cancer patients, a finding attributed to diminished tolerance of standard therapy. Elderly patients, however, are less likely to enroll on clinical trials; thus, limited data exists to evaluate their response to front line treatment. This study describes how elderly patients on trial fared, with respect to toxicity and response, compared to younger women. METHODS: A retrospective cohort study was performed of ovarian cancer patients enrolled in front line chemotherapy trials at our institution between 2000 and 2013...
January 10, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28081367/ordered-mesoporous-titanium-nitride-as-a-promising-carbon-free-cathode-for-aprotic-lithium-oxygen-batteries
#7
Byung Gon Kim, Changshin Jo, Jaeho Shin, Yeongdong Mun, Jinwoo Lee, Jang Wook Choi
Despite the extraordinary gravimetric energy densities, Li-O2 batteries are still facing a technological challenge; limited round trip efficiency leading to insufficient cycle life. Recently, carbonaceous electrode materials were found to be one of the primary origins of the limited cycle life, as they produce irreversible side products during discharge. A few investigations based on non-carbonaceous materials have demonstrated largely suppressed accumulation of irreversible side products but such studies have focused mainly on the materials themselves rather than delicate morphology control...
January 12, 2017: ACS Nano
https://www.readbyqxmd.com/read/28081015/the-prospects-of-phosphorene-as-an-anode-material-for-high-performance-lithium-ion-batteries-a-fundamental-study
#8
Congyan Zhang, Ming Yu, George Anderson, Ruchira Ravinath Dharmasena, Gamini Sumanasekera
To completely understand lithium adsorption, diffusion, and capacity on the surface of phosphorene and, therefore, the prospects of phosphorene as an anode material for high-performance lithium-ion batteries (LIBs), we carried out density-functional-theory calculations and studied the lithium adsorption energy landscape, the lithium diffusion mobility, the lithium intercalation, and the lithium capacity of phosphorene. We also carried out, for the very first time, experimental measurement of the lithium capacity of phosphorene...
January 12, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28080999/electrochemical-depositing-rgo-ti-rgo-heterogeneous-substrates-with-higher-thermal-conductivity-and-heat-transfer-performance-compared-to-pure-ti
#9
Jing Wang, Huatao Wang, Wenying Zhang, Xinyi Yang, Guangwu Wen, Yijie Wang, Weiwei Zhou
Titanium (Ti) and its alloys are widely applied in many high strength, light weight applications, but their thermal conductivity is lower compared to that of other metals, which limits their further applications. In this paper, we demonstrated experimentally that rGO-Ti-rGO heterogeneous substrates with higher thermal conductivity, up to ∼38.8% higher than Ti, could be fabricated by electrochemical depositing rGO on their surface. The rGO layers are grown on the surface of Ti substrates, with appearance of bedclothes on the beds...
January 12, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28080027/asymmetric-pentagonal-metal-meshes-for-flexible-transparent-electrodes-and-heaters
#10
Daniel Lordan, Micheal Burke, Mary Manning, Alfonso Martin, Andreas Amann, Dan O' Connell, Richard Murphy, Colin Lyons, Aidan J Quinn
Metal meshes have emerged as an important class of flexible transparent electrodes. We report on the characteristics of a new class of asymmetric meshes, tiled using a recently-discovered family of pentagons. Micron-scale meshes were fabricated on flexible polyethylene terephthalate substrates via optical lithography, metal evaporation (Ti 10 nm, Pt 50 nm) and lift-off. Three different designs were assessed, each with the same tessellation pattern and linewidth (5 µm), but with different sizes of the fundamental pentagonal unit...
January 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28080022/single-wall-carbon-nanotubes-doping-in-lead-acid-batteries-a-new-horizon
#11
Anjan Banerjee, Baruch Ziv, Yuliya Shilina, Elena Levi, Shalom Luski, Doron Aurbach
The addition of single-wall carbon nanotubes (SWCNT) to lead-acid battery electrodes is the most efficient suppresser of uncontrolled sulfation processes. Due to the cost of SWCNT, we studied the optimization loading of SWCNT in lead-acid batteries electrodes. We optimized the SWCNT loading concentrations in both the positive and negative plates, separately. Loadings of 0.01% and 0.001% in the positive and negative active masses were studied, respectively. Two volts of lead-acid laboratory cells with sulfuric acid, containing silica gel-type electrolytes, were cycled in a 25% and 50% depth-of-discharge (DOD) cycling with a charging rate of C and 2C, respectively, and discharge rates of C/2 and C, respectively...
January 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28079820/hepatoblastoma-in-an-11-year-old-case-report-and-a-review-of-the-literature
#12
Irina B Pateva, Rachel A Egler, Duncan S Stearns
RATIONALE: Hepatoblastoma is a rare malignancy. Approximately 100 cases are diagnosed yearly in the United States. The highest incidence occurs in infants and in children younger than 5 years. Cases involving patients older than 5 years are very rare. We describe the case of a patient who was diagnosed with hepatoblastoma at an atypical age of presentation for this type of malignancy. We also performed Ovid MEDLINE search for hepatoblastoma and epidemiology reports occurring in children between the ages of 5 and 18 years...
January 2017: Medicine (Baltimore)
https://www.readbyqxmd.com/read/28079705/prescribed-drinking-leads-to-better-cycling-performance-than-ad-libitum-drinking
#13
Costas N Bardis, Stavros A Kavouras, J D Adams, Nickos D Geladas, Demosthenis B Panagiotakos, Labros S Sidossis
: Drinking ad libitum during exercise often leads to dehydration ranging from -1 to -3% of body weight. PURPOSE: To study the effect of a prescribed hydration protocol matching fluid losses on a simulated 30-km criterium-like cycling performance in the heat (31.6±0.5 °C). METHOD: Ten elite, heat-acclimatized, male endurance cyclists (30±5 y, 76.5±7.2 kg, 1.81±0.07 m, VO2peak: 61.3±5.2 ml[BULLET OPERATOR]min[BULLET OPERATOR]kg, body fat: 10...
January 10, 2017: Medicine and Science in Sports and Exercise
https://www.readbyqxmd.com/read/28079402/sexual-dysfunction-in-premenopausal-women-could-be-related-to-hormonal-profile
#14
Fabiene Bernardes Castro Vale, Bruna Barbosa Coimbra, Gerson Pereira Lopes, Selmo Geber
Female sexual dysfunction (FSD) is a public health problem that affects women's quality of life. Although the relationship between some hormones and the FSD has been described, it is not well established for all hormones. Therefore, the aim of our study was to evaluate the association between hormonal dysfunction and sexual dysfunction in premenopausal women. We performed a cross-sectional study with 60 patients with regular menstrual cycles, with age ranging from 18 to 44 years, with previous diagnosis of FSD...
January 12, 2017: Gynecological Endocrinology
https://www.readbyqxmd.com/read/28079206/freestanding-moo2-mo2c-imbedded-carbon-fibers-for-li-ion-batteries
#15
Hongqin Li, Haijun Ye, Zheng Xu, Chuanyi Wang, Jiao Yin, Hui Zhu
Flexible and freestanding MoO2/Mo2C imbedded carbon fibers (MoO2/Mo2C ICFs) have been successfully synthesized via an integrated procedure including electrospinning, thermo-plastication in air and reduction/carbonization at high temperature. A series of techniques such as SEM, TEM, N2 adsorption-desorption analysis, XRD, TGA, IR and XPS have been employed to systemically characterize the MoO2/Mo2C ICFs. In particular, it is observed that the MoO2/Mo2C ICFs derived from phosphomolybdic acid have more highly porous structures than those derived from molybdic acid...
January 12, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28079056/endurance-and-cycle-to-cycle-uniformity-improvement-in-tri-layered-ceo2-ti-ceo2-resistive-switching-devices-by-changing-top-electrode-material
#16
Anwar Manzoor Rana, Tahira Akbar, Muhammad Ismail, Ejaz Ahmad, Fayyaz Hussain, Ijaz Talib, Muhammad Imran, Khalid Mehmood, Khalid Iqbal, M Younus Nadeem
Resistance switching characteristics of CeO2/Ti/CeO2 tri-layered films sandwiched between Pt bottom electrode and two different top electrodes (Ti and TaN) with different work functions have been investigated. RRAM memory cells composed of TaN/CeO2/Ti/CeO2/Pt reveal better resistive switching performance instead of Ti/CeO2/Ti/CeO2/Pt memory stacks. As compared to the Ti/CeO2 interface, much better ability of TaN/CeO2 interface to store and exchange plays a key role in the RS performance improvement, including lower forming/SET voltages, large memory window (~10(2)) and no significant data degradation during endurance test of >10(4) switching cycles...
January 12, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28078994/modulation-of-tumour-related-signaling-pathways-by-natural-pentacyclic-triterpenoids-and-their-semisynthetic-derivatives
#17
Andrey V Markov, Evgeniya B Logashenko, Marina A Zenkova
Pentacyclic triterpenoids are a large class of natural isoprenoids that are widely biosynthesized in higher plants. These compounds are potent anticancer agents that exhibit antiproliferative, antiangiogenic, antiinflammatory and proapoptotic activities. Although their effects on multiple pathways have been reported, unifying mechanisms of action have not yet been established. To date, a huge number of semisynthetic derivatives have been synthesized in different laboratories on the basis of triterpenoid scaffolds, and many have been assayed for their biological activities...
January 12, 2017: Current Medicinal Chemistry
https://www.readbyqxmd.com/read/28078884/construction-of-three-dimensional-hemin-functionalized-graphene-hydrogel-with-high-mechanical-stability-and-adsorption-capacity-for-enhancing-photodegradation-of-methylene-blue
#18
Yuewu Zhao, Yuanjian Zhang, Anran Liu, Zhenzhen Wei, Songqin Liu
A three-dimensional hemin-functionalized graphene hydrogel (Hem/GH) was prepared by a facile self-assembly approach. The as-prepared Hem/GH showed good mechanical strength with a storage modulus of 609-642 kPa and a high adsorption capacity to organic dye contaminants (341 mg g-1 for rhodamine B). Moreover, Hem/GH could be used as photosensitizer for photocatalytic degradation of organic dyes, and showed superior photodegradation activity of methylene blue (MB) with respect to the counterparts such as graphene hydrogel (GH) and commercial catalyst P25...
January 12, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28078805/three-dimensional-mos2-cnt-rgo-network-composites-for-high-performance-flexible-supercapacitors
#19
Shouzhi Wang, Jiayan Zhu, Yongliang Shao, Weiran Li, Yongzhong Wu, Xiaopeng Hao
Two-dimensional atomically thick materials, reduced graphene oxide (RGO) and layered molybdenum disulphide (MoS2) have been potentially investigated as novel energy storage materials because of their distinct physicochemical properties. However, these materials suffer from rapid capacity decay and low rate capability. This study describes a facile binder-free approach to fabricate large-scale 3D network structure MoS2@carbon nanotube (CNT)/RGO composites for application in flexible supercapacitor devices. The as-obtained composites possess a hierarchical porosity and an interconnected framework...
January 11, 2017: Chemistry: a European Journal
https://www.readbyqxmd.com/read/28078609/enhanced-thermophysical-properties-via-pao-superstructure
#20
Zahra Pournorouz, Amirhossein Mostafavi, Aditya Pinto, Apparao Bokka, Junha Jeon, Donghyun Shin
For the last few years, molten salt nanomaterials have attracted many scientists for their enhanced specific heat by doping a minute concentration of nanoparticles (up to 1% by weight). Likewise, enhancing the specific heat of liquid media is important in many aspects of engineering such as engine oil, coolant, and lubricant. However, such enhancement in specific heat was only observed for molten salts, yet other engineering fluids such as water, ethylene glycol, and oil have shown a decrease of specific heat with doped nanoparticles...
December 2017: Nanoscale Research Letters
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