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https://www.readbyqxmd.com/read/28821093/urea-free-synthesis-of-chitin-based-acrylate-superabsorbent-polymers-under-homogeneous-conditions-effects-of-the-degree-of-deacetylation-and-the-molecular-weight
#1
T G Liu, Y T Wang, B Li, H B Deng, Z L Huang, L W Qian, X Wang
In order to understand the chemical structure of chitin-based acrylate superabsorbent polymers (SAP), chitin was dissolved in NaOH aqueous solution via freezing-thawing cyclic treatment without urea, subsequently, a transparent hydrogel was prepared by copolymerizing the alkali-chitin solution and acrylic acid directly. The effects of the degree of deacetylation (DDA) and the molecular weight (Mw) of chitin on the properties of SAP were investigated in detail. With increasing the DDA and Mw, the yield improved while the water absorbency decreased, yet the effect of DDA is insignificant if the Mw is smaller enough...
October 15, 2017: Carbohydrate Polymers
https://www.readbyqxmd.com/read/28820997/nh2fe3o4-sio2-supported-peroxidase-catalyzed-h2o2-for-degradation-of-endocrine-disrupter-from-aqueous-solution-roles-of-active-radicals-and-noms
#2
Jing Ai, Weijun Zhang, Guiying Liao, Hua Xia, Dongsheng Wang
In this work, magnetic Fe3O4 was utilized to immobilize horseradish peroxidase (IM-HRP) in order to improve its stability and reusability by crosslinking method process with glutaraldehyde. The physicochemical properties of NH2Fe3O4@SiO2 and IM-HRP were characterized by powder X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Thermo-gravimetric Analysis (TGA) and Transmission electron microscopy (TEM). The thermal stability of immobilized-HRP was considerably improved in comparison with free counterpart...
August 13, 2017: Chemosphere
https://www.readbyqxmd.com/read/28820634/in-vivo-and-in-vitro-effects-of-atm-atr-signaling-pathway-on-proliferation-apoptosis-and-radiosensitivity-of-nasopharyngeal-carcinoma-cells
#3
Ming Wang, Gang Liu, Guo-Ping Shan, Bing-Bing Wang
AIM: The study investigated the ability of ataxia-telangiectasia mutated (ATM)/Rad3-related (ATR) signaling pathway to influence the proliferation, apoptosis, and radiosensitivity of nasopharyngeal carcinoma (NPC) cells. MATERIALS AND METHODS: NPC tissues and corresponding adjacent normal tissues were collected from 143 NPC patients. The NPC CNE2 cells were assigned into a control group, X-ray group, CGK-733 group, and X-ray+CGK-733 group. The mRNA levels of ATM and ATR were evaluated using quantitative real-time polymerase chain reaction (qRT-PCR) and the protein levels of ATM and ATR using western blotting...
August 2017: Cancer Biotherapy & Radiopharmaceuticals
https://www.readbyqxmd.com/read/28820572/on-the-functionality-selection-principle-for-high-voltage-lithium-ion-battery-electrolyte-additives
#4
Chi-Cheung Su, Meinan He, Cameron Peebles, Li Zeng, Adam Tornheim, Chen Liao, Lu Zhang, Jie Wang, Yan Wang, Zhengcheng Zhang
A new class of electrolyte additives based on cyclic fluorinated phosphate esters was rationally desgined and identified as being able to stabilize the surface of LiNi0.5Mn0.3Co0.2O2 (NMC532) cathode when cycled at potentials higher than 4.6 V vs. Li+/Li. Cyclic fluorinated phosphates were designed to incorporate functionalities of various existing additives to maximize their utilization. The synthesis and characterization of these new additives are described and their electrochemical performance in a NMC532/graphite cell cycled between 4...
August 18, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28820482/in-situ-synthesis-of-silver-nanoparticles-on-the-polyelectrolyte-coated-sericin-pva-film-for-enhanced-antibacterial-application
#5
Rui Cai, Gang Tao, Huawei He, Pengchao Guo, Meirong Yang, Chaoxiang Ding, Hua Zuo, Lingyan Wang, Ping Zhao, Yejing Wang
To develop silk sericin (SS) as a potential antibacterial biomaterial, a novel composite of polyelectrolyte multilayers (PEMs) coated sericin/poly(vinyl alcohol) (SS/PVA) film modified with silver nanoparticles (AgNPs) has been developed using a layer-by-layer assembly technique and ultraviolet-assisted AgNPs synthesis method. Ag ions were enriched by PEMs via the electrostatic attraction between Ag ions and PEMs, and then reduced to AgNPs in situ with the assistance of ultraviolet irradiation. PEMs facilitated the high-density growth of AgNPs and protected the synthesized AgNPs due to the formation of a 3D matrix, and thus endowed SS/PVA film with highly effective and durable antibacterial activity...
August 18, 2017: Materials
https://www.readbyqxmd.com/read/28820360/preliminary-study-on-the-changes-of-ovarian-reserve-menstruation-and-lymphocyte-subpopulation-in-systemic-lupus-erythematosus-sle-patients-of-childbearing-age
#6
H Gao, J Ma, X Wang, T Lv, J Liu, Y Ren, Y Li, Y Zhang
Objective The main aim of this study was to investigate the ovarian reserve, menstruation, and lymphocyte subpopulation in systemic lupus erythematosus (SLE) patients of childbearing age. Methods We enrolled 40 SLE patients of childbearing age and 40 age-matched healthy controls. Anti-Müllerian hormone (AMH) was tested by electrochemiluminescence, and lymphocyte subsets were tested by flow cytometry. Menstruation situation was obtained by interview. Results The AMH level of the SLE group was significantly lower than that of the control group ( p < 0...
January 1, 2017: Lupus
https://www.readbyqxmd.com/read/28820265/pressure-induced-polymerization-and-disproportionation-of-li2c2-accompanied-with-irreversible-conductivity-enhancement
#7
Lijuan Wang, Xiao Dong, Yajie Wang, Haiyan Zheng, Kuo Li, Xing Peng, Ho-Kwang Mao, Changqing Jin, Yufei Meng, Mingquan Huang, Zhisheng Zhao
Li2C2 has the highest theoretical capacity (1400mA•h•g-1) as the electrode material for Li-ion battery, but suffers from low conductivity. Here we found under external pressure its conductivity was irreversibly enhanced by 10^9-fold. To explain that, we performed X-ray diffraction, Raman, IR, Gas Chromatography-Mass Spectrometry and theoretical investigations under external pressure. We found the C22- anions approached to each other and polymerized upon compression, which is responsible for the irreversible enhancement of conductivity...
August 18, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28820246/manganese-catalyzed-upgrading-of-ethanol-into-1-butanol
#8
Shaomin Fu, Zhihui Shao, Yujie Wang, Qiang Liu
Biomass-derived ethanol is an important renewable feedstock. Its conversion into high-quality biofuels is a promising route to replace fossil resources. Herein, an efficient manganese-catalyzed Guerbet-type condensation reaction of ethanol to form 1-butanol was explored. This is the first example of upgrading ethanol into higher alcohols using a homogeneous non-noble-metal catalyst. This process proceeded selectively in the presence of a well-defined manganese pincer complex at the parts per million (ppm) level...
August 18, 2017: Journal of the American Chemical Society
https://www.readbyqxmd.com/read/28820205/a-comparative-study-of-c2h2-adsorption-properties-in-five-isomeric-copper-based-mofs-based-on-naphthalene-derived-diisophthalates
#9
Fengli Chen, Dongjie Bai, Donghao Jiang, Yao Wang, Yabing He
In this work, five positional isomeric ligands consisting of two peripheral isophthalate moieties attached to the central naphthyl core in different ways, namely, 5,5'-(naphthyl-1,3-diyl) diisophthalate (H4L1), 5,5'-(naphthyl-1,4-diyl) diisophthalate (H4L2), 5,5'-(naphthyl-1,5-diyl) diisophthalate (H4L3), 5,5'-(naphthyl-1,6-diyl) diisophthalate (H4L4) and 5,5'-(naphthyl-2,6-diyl) diisophthalate (H4L5), have been used to generate five copper-based MOF isomers. As revealed by single-crystal X-ray diffraction studies, they adopted two different types of topologies depending on the organic ligands: ssa topology for the MOFs ZJNU-71 and ZJNU-74 based on the ligands H4L1 and H4L4, respectively, and nbo topology for the MOFs ZJNU-72, ZJNU-73 and NOTT-103 derived from the ligands H4L2, H4L3 and H4L5, respectively...
August 18, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28820043/rapid-removal-of-chloroform-carbon-tetrachloride-and-trichloroethylene-in-water-by-aluminum-iron-alloy-particles
#10
Jie Xu, Yuan Pu, Xiao Jin Yang, Pingyu Wan, Rong Wang, Peng Song, Adrian Fisher
Water contamination with chlorinated hydrocarbons such as chloroform (CHCl3), carbon tetrachloride (CCl4) and trichloroethylene (TCE) is one of the major public health concerns. In this study, we explored the use of aluminum-iron alloys particles in millimeter scale for rapid removal of CHCl3, CCl4 and TCE from water. Three types of Al-Fe alloy particles containing 10, 20 and 58 wt% of Fe (termed as Al-Fe10, Al-Fe20 and Al-Fe58) were prepared and characterized by electrochemical polarization, X-ray diffraction and energy dispersive spectrometer...
August 18, 2017: Environmental Technology
https://www.readbyqxmd.com/read/28819848/capture-and-genetic-analysis-of-circulating-tumor-cells-using-a-magnetic-separation-device-magnetic-sifter
#11
Chin Chun Ooi, Seung-Min Park, Dawson J Wong, Sanjiv S Gambhir, Shan X Wang
Circulating tumor cells (CTCs) are currently widely studied for their potential application as part of a liquid biopsy. These cells are shed from the primary tumor into the circulation, and are postulated to provide insight into the molecular makeup of the actual tumor in a minimally invasive manner. However, they are extremely rare in blood, with typical concentrations of 1-100 in a milliliter of blood; hence, a need exists for a rapid and high-purity method for isolating CTCs from whole blood. Here, we describe the application of a microfabricated magnetic sifter toward isolation of CTCs from whole blood at volumetric flow rates of 10 mL/h, along with the use of a PDMS-based nanowell system for single-cell gene expression profiling...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28819776/tongxinluo-capsule-for-cardiac-syndrome-x-a-systematic-review-and-meta-analysis
#12
Hui-Min Mao, Mi Liu, Hua Qu, Li-Qiong Wang, Da-Zhuo Shi
OBJECTIVE: To evaluate the efficacy and safety of Tongxinluo Capsule (, TXL) for patients with cardiac syndrome X (CSX). METHODS: Randomized controlled trials (RCTs) regarding TXL in the treatment of CSX were searched in Chinese Biomedicine Literature Database, China National Knowledge Infrastructure, Chinese Scientific Journal Database, Wanfang Database, PubMed, EMBASE, Cochrane Central Register of Controlled Trial, websites of the Chinese and International Clinical Trial Registry platform up to June 30, 2015...
August 17, 2017: Chinese Journal of Integrative Medicine
https://www.readbyqxmd.com/read/28819287/characterization-of-polycrystalline-lead-oxide-for-application-in-direct-conversion-x-ray-detectors
#13
O Semeniuk, O Grynko, G Decrescenzo, G Juska, K Wang, A Reznik
While polycrystalline lead oxide (poly-PbO) is known to be one of the most promising photoconductors for utilization in X-ray detectors, its major performance parameters such as charge yield and mobility-lifetime product (μτ) are still not well established and require further investigation. Combining the conventional X-ray induced photocurrent and pulse height spectroscopy techniques we examine the X-ray photogeneration and recombination processes in poly-PbO. The measurements indicate that the amount of energy required to release a single electron hole pair W ± (inverse of charge yield) strongly depends on applied electric field and at 10 V/μm reaches ~20 eV/ehp...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28819129/dielectric-properties-of-y-and-nb-co-doped-tio2-ceramics
#14
Xianwei Wang, Bihui Zhang, Linhai Xu, Xiaoer Wang, Yanchun Hu, Gaohang Shen, Lingyun Sun
In this work, the (Y0.5Nb0.5)xTi1-xO2 (x = 0.001, 0.01, 0.02, 0.04, 0.06 and 0.1) ceramics (as called YNTO) were fabricated by synthesized through a standard solid-state reaction. As revealed by the X-ray diffraction (XRD) spectra, the YNTOs exhibit tetragonal rutile structure. Meanwhile, the grain size of YNTO ceramics increased and then decreased with the increase of x value, and the largest value reached when x = 0.02. All the YNTO samples display colossal permittivity (~10(2)-10(5)) over a wide temperature and frequency range...
August 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28818729/characterization-of-citrus-pectin-films-integrated-with-clove-bud-essential-oil-physical-thermal-barrier-antioxidant-and-antibacterial-properties
#15
Tanzeela Nisar, Zi-Chao Wang, Xi Yang, You Tian, Muneeb Iqbal, Yurong Guo
The increasing demand for bio-based materials to be used in food packaging has stimulated the development of novel, environmentally-friendly edible films. Antimicrobial films were developed by incorporating different levels of clove bud essential oil (0.5%, 1.0%, and 1.5%) into the citrus pectin in order to modify the functional properties of the films. Fourier-transform infrared spectroscopy (FTIR), differential scanning calorimetry analysis (DSC) and X-ray diffraction (XRD) were performed, together with the determination of physical, optical, mechanical, antioxidant and antimicrobial properties of pectin emulsified films...
August 14, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28818608/potential-resistance-mechanisms-revealed-by-targeted-sequencing-from-lung-adenocarcinoma-patients-with-primary-resistance-to-epidermal-growth-factor-receptor-egfr-tyrosine-kinase-inhibitors-tkis
#16
Jia Zhong, Lei Li, Zhijie Wang, Hua Bai, Gai Fei, Jian Chunduan, Jun Zhao, Minglei Zhuo, Yuyang Wang, Shuhang Wang, Wanchun Zang, Meina Wu, Tongtong An, Guanhua Rao, Jie Wang
BACKGROUND: EGFR-TKIs have greatly improved the prognosis of lung adenocarcinoma. However, approximately 5%-10% lung adenocarcinoma patients with EGFR sensitive mutations have primary resistance to EGFR-TKIs treatment. The underlying mechanism is unknown. METHODS: This study used next-generation sequencing (NGS) to explore the mechanisms of primary resistance by analyzing 11 patients with primary resistance and 11 patients sensitive to EGFR-TKIs. NGS targeted sequencing was performed on the Illumina X platform for 483 cancer-related genes...
August 14, 2017: Journal of Thoracic Oncology
https://www.readbyqxmd.com/read/28817833/fmnl2-destabilises-commd10-to-activate-nf-%C3%AE%C2%BAb-pathway-in-invasion-and-metastasis-of-colorectal-cancer
#17
S S Yang, X M Li, M Yang, X L Ren, J L Hu, X H Zhu, F F Wang, Z C Zeng, J Y Li, Z Q Cheng, W T Liao, Y Q Ding, J Guan, L Liang
BACKGROUND: Diaphanous-related formins (DRFs), actin necleator, have been known to participate in the progression of cancer cells. We previously reported that FMNL2 (Formin-like2), a member of DRFs, was a positive regulator in colorectal cancer (CRC) metastasis, yet proteins and pathways required for the function of this pro-invasive DRFs remain to be identified. METHODS: The relationship between FMNL2 and COMMD10 was examined using Co-IP, GST pull-down, immunofluorescence and in vitro ubiquitination assay...
August 17, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28816891/computed-tomography-use-plateaus-among-children-with-emergency-visits-for-abdominal-pain
#18
Jahan Fahimi, Aaron E Kornblith, Hemal Kanzaria, Andrew Herring, Ralph C Wang
OBJECTIVES: Abdominal pain is a common pediatric complaint to emergency departments (EDs), and clinicians often rely on imaging for diagnosis. Studies have demonstrated an increase in computed tomography (CT) in this population. Following emphasis on radiation reduction by researchers and organizations, this study evaluates recent national trends in CT use among pediatric patients presenting to EDs with abdominal pain. METHODS: This is a cross-sectional analysis of ED patients 18 years or younger with chief complaint of abdominal pain in the National Hospital Ambulatory Medical Care Survey from 2008 to 2011...
August 14, 2017: Pediatric Emergency Care
https://www.readbyqxmd.com/read/28816458/pressure-induced-emission-enhancement-of-carbazole-the-restriction-of-intramolecular-vibration
#19
Yarong Gu, Kai Wang, Yu-Xiang Dai, Guanjun Xiao, Yuguo Ma, Yuancun Qiao, Bo Zou
Pressure-induced emission enhancement (PIEE), a novel phenomenon on the enhancement of the solid-state emission efficiency of fluorophores, has been arousing wide attention in recent years. However, researches on PIEE are still in the early stage. To further pursue more enhanced efficiency, discovering and designing more PIEE systems would be urgently desirable and of great importance. In this letter, we found carbazole presented a conspicuous emission enhancement under high pressure up to 1.0 GPa. In situ high-pressure infrared spectroscopy, angle-dispersive X-ray diffraction analysis combined with Hirshfeld surface theory calculation indicated that the PIEE of carbazole was attributed to the decrease of non-radiation vibration process...
August 17, 2017: Journal of Physical Chemistry Letters
https://www.readbyqxmd.com/read/28816411/a-stereovision-model-applied-in-bio-micromanipulation-system-based-on-stereo-light-microscope
#20
Yuezong Wang
A bio-micromanipulation system is designed for manipulating micro-objects with a length scale of tens or hundreds of microns based on stereo light microscope. The world coordinate reconstruction of points on the surface of micro-objects is an important goal for the micromanipulation. Traditional pinhole camera model is applied widely in macrocomputer vision. However, this model will output bad data with remarkable error if it is directly used to reconstruct three-dimensional world coordinates for stereo light microscope...
August 17, 2017: Microscopy Research and Technique
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