2-Hy­droxy­ethanaminium 2,4-dinitro­phenolate hemihydrate

In the title salt, C2H8NO+·C6H3N2O5 −·0.5H2O, the anions, cations and water mol­ecules are linked via N—H⋯O and O—H⋯O hydrogen bonds, forming a three-dimensionl network

Adaptive Quantization for Predicting Transform-based Point Cloud Compression

The representation of three-dimensional objects with point clouds is attracting increasing interest from researchers and practitioners. Since this representation requires a huge data volume, effective point cloud compression techniques are required. One of the most powerful solutions is the Moving Picture Experts Group geometry-based point cloud compression (G-PCC) emerging standard. In the G-PCC lifting transform coding technique, an adaptive quantization method is used to improve the coding efficiency. Instead of assigning the same quantization step size to all points, the quantization step size is in-creased according to level of detail traversal order. In this way, the attributes of more important points receive a finer quantization and have a smaller quantization error than the attributes of less important ones. In this paper, we adapt this approach to the G-PCC predicting transform and propose a hardware-friendly weighting method for the adaptive quantization. Experimental results show that compared to the current G-PCC test model, the proposed method can achieve an average Bjøntegaard delta rate of -6.7%, -14.7%, -15.4%, and -10.0% for the luma, chroma Cb, chroma Cr, and reflectance components, respectively on the MPEG Cat1-A, Cat1-B, Cat3-fused and Cat3-frame datasets

Electrical Signal Guided Ibuprofen Release from Electrodeposited Chitosan Hydrogel

Electrical signal guided drug release from conductive surface provides a simple and straightforward way for advanced drug delivery. In this study, we investigated the ibuprofen release from electrodeposited chitosan hydrogel by applying electrical signals. Specifically, chitosan hydrogel was electrodeposited on titanium plate and used as a matrix for ibuprofen load and release. The release of ibuprofen from the chitosan hydrogel on titanium plate was pH sensitive. By applying a positive or negative electrical potential, the release rate of ibuprofen from the electrodeposited chitosan can be facilely controlled. Thus, coupling chitosan electrodeposition and electrical signal control spurs new possibilities for biopolymeric coating and drug elution on conductive implants

Concentration-gradient LiMn0.8Fe0.2PO4 cathode material for high performance lithium ion battery

It is a great challenge to combine good cycling performance with high rate capability for LiMn1-xMxPO4 cathode materials owing to the Mn dissolution upon cycling and its low electronic/ionic conductivity. Here, we report a novel concentration-gradient structure of LiMn0.8Fe0.2PO4 material constructed by solvothermal treatment. This material shows a linear increase of Mn concentration from the edge to the particle centre, but the inverse trend for Fe concentration, which leads to the formation of Mn-rich phase in bulk and Fe-rich phase at surface. The Fe-rich phase effectively suppresses the corrosion from the electrolyte that minimizes the Mn dissolution and also improves the electronic/ionic conductivity of the surface that decreases the cathode/electrolyte interface resistance. Consequently, this concentration-gradient material achieves superior capacity retention with 98% after 50 cycles at 1 degrees C even at elevated temperature, and also exhibits an excellent rate capability with the reversible capacity of 130 mA h g(-1) at 5 degrees C rate. These results suggest that the concentration-gradient LiMn0.8Fe0.2PO4 is an ideal type of cathode material for high performance Lithium ion batteries. (C) 2015 Elsevier B.V. All rights reserved

The structure, morphology, and electrochemical properties of Li1+xNi1/6Co1/6Mn4/6O2.25+x/2 (0.1 ≤ x ≤ 0.7) cathode materials

Li1+xNi1/6Co1/6Mn4/6O2.25+x/2 (0.1≤x≤0.7) cathode materials have been synthesized by a simple carbonate co-precipitation method. The effects of the lithium content on the structure, physical property, and electrochemical performance of the samples have been investigated. As the increase of lithium content, the Li1+xNi1/6Co1/6Mn4/6O2.25+x/2 evolves from a mixture of hexagonal R？3m, monoclinic C2/m, and spinel Fd？3m structure to a mixture of hexagonal and monoclinic structure, accompanied with less cation mixing between Li+ and Ni2+. The increase of x value also affects the size of the primary particles and the roughness of the secondary particles. The i1+xNi1/6Co1/6Mn4/6O2.25+x/2 with appropriate lithium content, e.g., x = 0.3, thereby small particle size, high pellet density, and low cation mixing, brings on the largest discharge capacity, which is more than 288 mAh g？1 in the voltage range of 2.0–4.8 V at 25 mA g？1, and the lowest irreversible capacity loss of 47 mAh g？1 among these cathode materials

Rumba Dance Combined with Breathing Training as an Exercise Intervention in the Management of Stress Urinary Incontinence in Postmenopausal Women: A Randomized Controlled Trial

Purpose: Stress urinary incontinence (SUI) refers to involuntary leakage from the urethra, synchronous with exertion/effort, sneezing or coughing, which has a negative effect on quality of life. Studies have shown that mild-to-moderate physical activities reduce the risk of SUI by multiple mechanisms. The objective of this study was to determine whether the Rumba dance combined with breathing training (RDBT) can reduce the severity of incontinence and improve the quality of life of patients with SUI. Methods: A randomized clinical trial was conducted with women who were sedentary, were postmenopausal, reported mild-to-moderate SUI on a 1-h pad test, were not already engaged in Rumba dance and did not receive estrogen replacement therapy. The patients were randomly assigned to the RDBT group (n = 13) or the control group (n = 11). The intervention included 90 min of RDBT three times per week for 16 weeks, and the vaginal resting pressure (VRP), pelvic floor muscle (PFM) strength and endurance, 1-h pad test, International Consultation on Incontinence Questionnaire—Urinary Incontinence Short Form (ICIQ—UI SF), and the Incontinence Quality of Life Questionnaire (I—QOL) were measured or completed at baseline and 16 weeks. None of the participants reported adverse events. Results: The mean (±SD) age of the participants was 55.75 ± 5.58 years. After 16 weeks, in the RDBT group, the urine leakage on the 1-h pad test was significantly decreased −2.91 ± 0.49 from the baseline (p = 0.000). The VRP increased from 76.00 ± 16.23 cmH2O to 95.09 ± 18.90 cmH2O (p = 0.000), the PFM endurance of class I (−3.15 ± 1.99% vs. −0.46 ± 0.97%, p = 0.000) and class II (−0.69 ± 0.95% vs. −0.23 ± 0.44%, p = 0.065) increased, and the grades of PFM strength of class I and class II were significantly enhanced (p < 0.01). Finally, the severity of self-reported incontinence (ICIQ—UI SF) significantly decreased from 6.12 ± 2.15 to 3.81 ± 1.68 (p = 0.000), and quality of life (I—QOL) improved from 75.73 ± 11.93 to 83.48 ± 7.88 (p = 0.005). Conclusion: A 16-week RDBT program can increase PFM strength and endurance to reduce the severity of incontinence symptoms and improve the quality of life in patients with SUI, demonstrating the feasibility of recruiting and retaining postmenopausal women with SUI into a RDBT therapeutic program

Rational Design of Magnetic Micronanoelectrodes for Recognition and Ultrasensitive Quantification of Cysteine Enantiomers

Driven by the urgent need for recognition and quantification of trace amino acids enantiomers in various biologic samples, we demonstrate for the first time an ultrasensitive electrochemical chiral biosensor for cysteine (Cys) based on magnetic nanoparticles (Fe₃O₄@PDA/Cu_<i>x</i>O) as electrode units. d-Cys-Cu²⁺-d-Cys formed in the presence of cysteine exhibits strong stability and a shielding effect on the redox current of indicator Cu²⁺, which can be used to quantify and recognize d-Cys by square wave voltammetry. Simultaneous detection of d-Cys and homocysteine (Hcy) is achieved in the presence of other amino acids, demonstrating an excellent selectivity of the sensor. Moreover, aided by the enrichment treatment effect of magnetic micronanoelectrodes, an ultrahigh sensitivity up to 102 μA μM^–1 cm^–2 was achieved, the detection limit is reduced to picomolar level (83 pM) for d-Cys and can be used for the recognition of cysteine enantiomers. The proposed method has been verified by real sample analysis with satisfactory results. The results highlight the feasibility of our proposed strategy for magnetic micronanoelectrode sensor, electrochemical recognition, and quantification of d-Cys, which can be more broadly applicable than that with traditional electrode structures and further advance the field of electrochemical sensors