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Reverse dipping

Ruipeng Ren, Jing Ren, Yongkang Lv
Carbon nanomaterials, especially graphene and carbon nanotube, with high specific surface area, electrical conductivity and excellent mechanical flexibility have been considered as favorable alternatives to graphite anodes in Li-ion batteries. However, the limited Li ion storage sites within the sp2 carbon hexahedrons leads to the low storage capacity. Thus, the rational structure design is essential to prepare the high performance carbon-based anode materials. Here, we have used flexible single-wall carbon nanotubes (SWCNT) with ultra-high electrical conductivity to wrap the three-dimensional graphene foam (GF) by a facile dip-coating process to form the binary network structure...
March 10, 2018: Chemistry, An Asian Journal
Jonathan C L Rodrigues, Antonio Matteo Amadu, Amardeep Ghosh Dastidar, Iwan Harries, Amy E Burchell, Laura E K Ratcliffe, Emma C Hart, Mark C K Hamilton, Julian F R Paton, Angus K Nightingale, Nathan E Manghat
We investigate the impact of dipper status on cardiac structure with cardiovascular magnetic resonance (CMR). Ambulatory blood pressure monitoring and 1.5T CMR were performed in 99 tertiary hypertension clinic patients. Subgroup analysis by extreme dipper (n = 9), dipper (n = 39), non-dipper (n = 35) and reverse dipper (n = 16) status was performed, matched in age, gender and BMI. Left ventricular (LV) mass was significantly higher for extreme dippers than dippers after correction for covariates (100 ± 6 g/m2 vs 79 ± 3 g/m2 , P = ...
March 8, 2018: Journal of Clinical Hypertension
Min Yin Goh, Melinda S Millard, Edmund C K Wong, David J Berlowitz, Marnie Graco, Rachel M Schembri, Douglas J Brown, Albert G Frauman, Christopher J O'Callaghan
STUDY DESIGN: Observational study. OBJECTIVES: To quantify diurnal blood pressure (BP) patterns and nocturnal hypertension and to measure diurnal urine production in people with chronic spinal cord injury (SCI), compared with controls without SCI. SETTING: Chronic SCI population in the community in Victoria, Australia. METHODS: Participants were recruited by advertisement, and sustained SCI at least a year prior or were healthy able-bodied volunteers...
March 2, 2018: Spinal Cord
Dan Su, Anqi Song, Bin Yan, Qi Guo, Ya Gao, Yanhua Zhou, Fuling Zhou, Guang Yang, Chaoying Zhang
The abnormalities of blood pressure (BP) nocturnal decline have been found to be predictive for carotid plaque and lacunar infarction in patients with hypertension. In this study, BP dipping patterns in postmenopausal females with hypertension were investigated. The nocturnal decline of systolic BP (SBP) was evaluated using 24-hour ambulatory BP monitoring (ABPM). A total of 163 postmenopausal females were eventually included in our study. The prevalence of reverse-dipper BP pattern was 32.3% in females with menopause age in their 40s and 40% in their 50s...
February 23, 2018: International Heart Journal
Sang-Hoon Lee, Yong-Jae Kim, Ye-Seol Nam, Seong-Hyo Park, Hochun Lee, Yura Hyun, Chang-Seop Lee
Silicon (Si) is one of the most attractive anode materials for lithium secondary batteries because of its large theoretical capacity, high safety, low cost and environmental benignity. However, Si-based anode material needs to overcome the structural change of the solid-electrolyte interphase due to the large volume change during cycling. To resolve these problems of composites by exploiting the superior conductivity, large specific surface area and flexibility of graphene, we have synthesized reduced graphene oxide (rGO)/Si composite electrode via a simple dip-coating method...
July 1, 2018: Journal of Nanoscience and Nanotechnology
Hendrik Woehlk, Jan Steinkoenig, Christiane Lang, Lukas Michalek, Vanessa Trouillet, Peter Krolla-Sidenstein, Anja S Goldmann, Leonie Barner, James P Blinco, Christopher Barner-Kowollik, Kathryn E Fairfull-Smith
We pioneer a versatile surface modification strategy based on mussel inspired oxidative catecholamine polymerization for the design of nitroxide containing thin polymer films. A 3,4-dihydroxy-L-phenylalanine (L-DOPA) monomer equipped with a 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) derived oxidation-labile hydroxylamine functional group is employed as a universal coating agent to generate polymer scaffolds with persistent radical character. Various types of materials including silicon, titanium, ceramic alumina and inert poly(tetrafluoroethylene) (PTFE) were successfully coated with poly(DOPA-TEMPO) thin films in a one-step dip-coating procedure under aerobic, slightly alkaline (pH 8...
February 14, 2018: Langmuir: the ACS Journal of Surfaces and Colloids
Shaopan Zhao, Shihui Fu, Jiefeng Ren, Leiming Luo
OBJECTIVE: This study was aimed to assess whether sleep disorder was associated with an increased risk of less nocturnal blood pressure (BP) dipping in elderly patients with hypertension. METHODS: Cases were 1006 patients, aged >60 years, who were admitted to hospital with diagnosed hypertension during 2016-2017, and were divided into three groups with the systolic nocturnal BP dipping of 10%, and 0% as the cut-off value. The patients' sleep was evaluated by Pittsburgh sleep quality index (PSQI)...
February 8, 2018: Clinical and Experimental Hypertension: CHE
Jiajia Ye, Zizhong Chen, Qiang Liu, Caixia Xu
The SnS2 nanoflowers anchored on three dimensional porous graphene were easily constructed with nickel foam (NF) as supported backbone through the dip-coating method followed by one-step controllable hydrothermal growth and mild reduction. The interconnected SnS2 nanoflowers with cross-linking nanosheets and rich pores assembled to form one layer of continuous network structure, which tightly adhered on the surface of graphene. The porous graphene supported by NF built a conductively integral highway that is preferable for the charge transfer kinetics, while the hierarchical pores from the SnS2 nanoflowers and NF are particularly beneficial for mitigating the volume expansion and promoting electrolyte penetration...
January 16, 2018: Journal of Colloid and Interface Science
Gino Iannucci, Luigi Petramala, Giuseppe La Torre, Barbara Barbaro, Clara Balsano, Pietro Giacomo Curatulo, Francesco Amadei, Marino Paroli, Antonio Concistrè, Claudio Letizia
Ambulatory blood pressure monitoring (ABPM) is a helpful tool to comprehensively identify and diagnose arterial hypertension. Moreover, it allows to better identify alterations in the circadian BP profile, as the nocturnal "nondipping" status, characterized by a lack of the physiological 10% night BP reduction and associated with a greater risk of target organ damage. However, ABPM has some limitations such as restricted availability, discomfort, particularly at night, cost implications, and reproducibility...
December 2017: Medicine (Baltimore)
Serena Andreotti, Elisa Franzoni, Paola Fabbri
Reversibility is a mandatory requirement for materials used in heritage conservation, including hydrophobic protectives. Nevertheless, current protectives for stone are not actually reversible as they remain on the surfaces for a long time after their hydrophobicity is lost and can hardly be removed. Ineffective and aged coatings may jeopardise the stone re-treatability and further conservation interventions. This paper aims at investigating the performance of PHAs-based coatings for stone protection, their main potential being the 'reversibility by biodegradation' once water repellency ended...
January 20, 2018: Materials
Ningyu Liu, Lei Shi, Song Zhu, Xinbiao Xu, Shixing Yuan, Xinliang Zhang
A compact and relatively stable structure is experimentally demonstrated to excite whispering gallery modes (WGMs) in a single chemically fabricated silica microparticles with a diameter of around 10.6 μm attached to an optical microfiber. The resonance dip with an extinction ratio of 14 dB and Q factor of around 300 has been achieved. Based on the WGMs in this structure, an in-line fiber-optic displacement sensor is presented with a high sensitivity of 33 dB/mm and a measurement range of over 400 μm. The measurement resolution of this displacement sensor can reach to ~10 μm...
January 8, 2018: Optics Express
Peibo Gao, Shixing Xu, Zhangwei Chen, Xi Huang, Zhihao Bao, Changshi Lao, Guangming Wu, Yongfeng Mei
Carbon hosts have been utilized to obtain composite cathodes with high sulfur loadings for Li-S battery. However the complicated synthesis process may hinder their practical applications. Besides, their mechanical and electrochemical properties shall be further improved. Herein, a facile scalable dip-coating process is developed to synthesize a flexible composite cathode with a high sulfur loading. Via the process, a hybrid composed of carbon nanotubes, carbon black, sulfur and titania nanoparticles is successfully conformally coated on the carbonized textile (c-textile)...
January 8, 2018: ACS Applied Materials & Interfaces
N J Wachter, M Mentzel, C Häderer, G D Krischak, J Gülke
Ulnar nerve injuries can cause deficient hand movement patterns. Their assessment is important for diagnosis and rehabilitation in hand surgery cases. The purpose of this study was to quantify the changes in temporal coordination of the finger joints during different power grips with an ulnar nerve block by means of a sensor glove. In 21 healthy subjects, the onset and end of the active flexion of the 14 finger joints when gripping objects of different diameters was recorded by a sensor glove. The measurement was repeated after an ulnar nerve block was applied in a standardized setting...
December 20, 2017: Hand Surgery and Rehabilitation
Hang Su, Hao Wang, Hua Zhao, Tingyu Xue, Jingwen Zhang
In this study, a structure to realize a switchover between two different responses of electromagnetically induced transparency (EIT) was designed and implemented by simulation. Taking advantage of the anisotropy in the structure and the coupling between the radiative and dark elements, a metasurface switch with modulation depth of over 85% between orthogonal polarization incident light illuminations was demonstrated. The key mode switchover between the "on" and "off" states was achieved by electrically changing the dressing light polarization with a liquid crystals layer pre-aligned with a mature technology, without changing the incident light and an expected and reversible transition from an EIT-like spectrum to a strong spectral dip was observed...
December 12, 2017: Scientific Reports
Ria Marni Tubaon, Paul R Haddad, Joselito P Quirino
In proteomics, dodecyl sulfate (DS- ) as sodium salt is commonly used in protein solubilization prior to tryptic digestion, but the presence of the DS- hampers the electrospray ionization mass spectrometric (ESI-MS) analysis. The development of DS- depletion techniques is therefore important especially when dealing with small samples where there could be poor sensitivity due to sample loss or dilution during sample preparation. Here, we present a simple and fast electrokinetic removal method of DS- from small volumes of peptide and digested protein samples prior to ESI-MS...
December 19, 2017: Analytical Chemistry
Dominika Klimczak, Marek Kuch, Tomasz Pilecki, Dorota Żochowska, Agnieszka Wirkowska, Leszek Pączek
MicroRNAs play multiple roles in the regulation of blood pressure (BP). Nevertheless, to date, no study has assessed the association between microRNA plasma expression and BP control in chronic kidney disease (CKD) patients. Given this background, we evaluated the plasma expression of miR-155-5p, a translational inhibitor of angiotensin receptor type I, in CKD patients, to determine the association between miR-155-5p level and BP control. In this single-center cross-sectional study, we analyzed the miR-155-5p concentration by quantitative reverse transcriptase polymerase chain reaction using the U6 snRNA as a reference gene and 24-hour ambulatory blood pressure monitoring in CKD patients (stage ≥2) in relation to a control group of healthy age-matched and gender-matched individuals, with normal BP proven by the ambulatory blood pressure monitoring...
December 2017: Journal of the American Society of Hypertension: JASH
Nicola Di Daniele, Danilo Alunni Fegatelli, Valentina Rovella, Veronica Castagnola, Marco Gabriele, Angelo Scuteri
BACKGROUND AND AIMS: Hypertension is a major risk factor for chronic kidney disease (CKD), and CKD progression is associated with suboptimal blood pressure (BP) control. Here we evaluate the impact of CKD on the attainment of BP control and the circadian BP profile in older subjects. METHODS: In this observational study, we studied 547 patients referred to the hypertension clinic, of whom 224 (40.9%) had CKD. Blood pressure (BP) control and circadian BP patterns were evaluated by 24-hour ambulatory BP monitoring...
December 2017: Atherosclerosis
Kerryanne Crawford, Juan José Bonfiglio, Andreja Mikoč, Ivan Matic, Ivan Ahel
Proper and timely regulation of cellular processes is fundamental to the overall health and viability of organisms across all kingdoms of life. Thus, organisms have evolved multiple highly dynamic and complex biochemical signaling cascades in order to adapt and survive diverse challenges. One such method of conferring rapid adaptation is the addition or removal of reversible modifications of different chemical groups onto macromolecules which in turn induce the appropriate downstream outcome. ADP-ribosylation, the addition of ADP-ribose (ADPr) groups, represents one of these highly conserved signaling chemicals...
November 3, 2017: Critical Reviews in Biochemistry and Molecular Biology
Berrin Karadag, Tolga Ozyigit, Zeliha Serindag, Aysegul Ilhan, Beste Ozben
BACKGROUND: Target organ damage is important for global cardiovascular risk assessment. The aim of this study was to explore the association between the blood pressure profile and end-organ damage in a hypertensive non-diabetic cohort. METHODS: A total of 560 consecutive hypertensive nondiabetic patients (mean age: 58.2 ± 13.3 years, 221 men) were included in the study. All patients underwent thorough physical examination including fundoscopic examination. First morning urine samples were obtained from each patient and measurement of the albumin-to-creatinine ratio in first morning urine collection samples was used for diagnosis of microalbuminuria...
October 4, 2017: Wiener Klinische Wochenschrift
Georgios Tsivgoulis, Maria Pikilidou, Aristeidis H Katsanos, Kimon Stamatelopoulos, Fotios Michas, Aikaterini Lykka, Christina Zompola, Angeliki Filippatou, Efstathios Boviatsis, Konstantinos Voumvourakis, Nikolaos Zakopoulos, Efstathios Manios
The Framingham Stroke Risk Profile (FSRP) is a novel and reliable tool for estimating the 10-year probability for incident stroke in stroke-free individuals, while the predictive value of ambulatory blood pressure monitoring (ABPM) for first-ever and recurrent stroke has been well established. We sought to evaluate cross-sectionally the association of ABPM parameters with FSRP score in a large sample of 2343 consecutive stroke-free individuals (mean age: 56.0±12.9, 49.1% male) who underwent 24-hour ABPM. True hypertensives showed significantly higher FSRP (11...
September 15, 2017: Journal of the Neurological Sciences
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