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Liyong Du, Chunxiao Xu, Jianjun Liu, Yazhu Lan, Pengwan Chen
An Fe3O4-Fe@BCNT composite was successfully synthesized via detonation of a mixture of hexogen (C3H6N6O6) and ferrocene (C10H10Fe), in which bamboo-like carbon nanotubes encapsulating iron nanoparticles attached to Fe3O4 flakes (up to 58.1%) were formed. In the detonation process, hexogen was used to generate high temperature and high pressure, while ferrocene was used as a carbon source and catalyst. The recovered Fe3O4-Fe@BCNT composite was characterized by TEM, SEM, XRD, XPS, and Raman spectroscopy. The results indicate that multi-walled carbon tubes with a bamboo-like structure are formed, in which iron nanoparticles are encapsulated...
September 25, 2017: Nanoscale
Frank A Spitznagel, Sebastian D Horvath, Petra C Gierthmuehlen
AIM: The purpose of this systematic review was to assess the clinical performance of implant-supported monolithic all-ceramic single- and multi-unit restorations. MATERIALS AND METHODS: The electronic databases of MEDLINE via PubMed, the Cochrane Library (CENTRAL) and EMBASE were searched for clinical studies on monolithic all-ceramic single and multi-unit implant-supported fixed dental prostheses. Human studies with a mean follow-up of at least 2 years and published in English or German language peer-reviewed journals up until August 2016 were included...
2017: European Journal of Oral Implantology
Samir Abou-Ayash, Malin Strasding, Gerta Rücker, Wael Att
AIM: The impact of prosthetic material selection on implant survival is not clear. The current criteria for choosing a prosthetic material seem to be based on clinician preferences. This systematic review aims to evaluate the impact of restorative materials on the mid- and long-term survival of implants supporting single crowns and fixed partial dentures. MATERIALS AND METHODS: Hand and MEDLINE searches were performed to identify relevant literature for single crowns (SC) and fixed partial dentures (FPD)...
2017: European Journal of Oral Implantology
Ji-Ping Teng, Zhi-Ying Yang, Yu-Ming Zhu, Da Ni, Zhi-Jun Zhu, Xiao-Qiang Li
Lung cancer is a leading cause of cancer-related mortalities worldwide. In the present study, a comparison of To determine the roles of ARHGAP10 in the proliferation, migration and invasion of lung cancer cells expression levels between normal lung tissues and lung cancer tissues were compared using immunoblotting, and CCK-8 and Transwell assays. Lung cancer tissues had a decreased ARHGAP10 mRNA expression level compared to the adjacent normal tissues. The ectopic expression of ARHGAP10 significantly suppressed the migration, invasion and proliferation of lung cancer cells...
October 2017: Oncology Letters
Carolin Fleischmann, Athina Anastasaki, Will R Gutekunst, Alaina J McGrath, Phillip D Hustad, Paul G Clark, David S Laitar, Craig J Hawker
A straightforward and efficient synthetic method that transforms poly(methyl methacrylate) (PMMA) into value-added materials is presented. Specifically, PMMA is modified by transesterification to produce a variety of functional copolymers from a single starting material. Key to the reaction is the use of lithium alkoxides, prepared by treatment of primary alcohols with LDA, to displace the methyl esters. Under optimized conditions, up to 65% functionalization was achieved and copolymers containing alkyl, alkene, alkyne, benzyl, and (poly)ether side groups could be prepared...
May 1, 2017: Journal of Polymer Science. Part A, Polymer Chemistry
Jiahang Sun, Xiaoying Gao, Dawei Meng, Yang Xu, Xichun Wang, Xin Gu, Mian Guo, Xiaodong Shao, Hongwen Yan, Chuanlu Jiang, Yongri Zheng
BACKGROUND: MiR-134 is enriched in dendrites of hippocampal neurons and plays crucial roles in the progress of epilepsy. The present study aims to investigate the effects of antagomirs targeting miroRNA-134 (Ant-134) on limk1 expression and the binding of miR-134 and limk1 in experimental seizure. METHODS: Status epilepticus (SE) rat model was established by lithium chloride-pilocarpine injection and was treated with Ant-134 by intracerebroventricular injection...
September 22, 2017: Cellular Physiology and Biochemistry
Deepak Dubal, Deepak Patil, Santosh Patil, N R Munirathnam, Pedro Gomez-Romero
The search of high-performance anode materials for Lithium-ion batteries (LIBs) is currently one of the most important tasks. Herein, we are introducing BiVO4 fern architectures as a new anode material for LIBs. The BiVO4 fern shows an excellent reversible capacity of 769 mAh/g (ultrahigh volumetric capacity of 3984 mAh/cm3) at 0.12 A/g with a great capacity retention. Later, a LIB full cell is assembled with BiVO4 ferns as anode and LiFePO4 (LFP, commercial) as cathode material. Notably, the device can achieve the capacity of 140 mAh/g at 1C rate that is 81 % of the capacity of cathode and maintained to 104 mAh/g at high C-rate of 8C, which makes BiVO4 a promising candidate as high-energy anode materials for LIBs...
September 21, 2017: ChemSusChem
Martin Alda
No abstract text is available yet for this article.
October 2017: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
Michael Berk, Robert Post, Aswin Ratheesh, Emma Gliddon, Ajeet Singh, Eduard Vieta, Andre F Carvalho, Melanie M Ashton, Lesley Berk, Susan M Cotton, Patrick D McGorry, Brisa S Fernandes, Lakshmi N Yatham, Seetal Dodd
Illness staging is widely utilized in several medical disciplines to help predict course or prognosis, and optimize treatment. Staging models in psychiatry in general, and bipolar disorder in particular, depend on the premise that psychopathology moves along a predictable path: an at-risk or latency stage, a prodrome progressing to a first clinical threshold episode, and one or more recurrences with the potential to revert or progress to late or end-stage manifestations. The utility and validity of a staging model for bipolar disorder depend on its linking to clinical outcome, treatment response and neurobiological measures...
October 2017: World Psychiatry: Official Journal of the World Psychiatric Association (WPA)
Yunya Zhang, Zan Gao, Xiaodong Li
An effective strategy to tackle the twin crises of global deforestation and fossil fuel depletion is to recycle biomass materials for energy storage devices. This study reports a unique and innovative solution to capitalize on a currently overlooked resource to produce high-performance lithium-sulfur (Li-S) batteries from recycled paper. The recycled paper fibers are creatively composited with graphene oxide sheets via a capillary adsorption method. The recycled paper/graphene oxide hybrid is then converted to activated paper carbon/reduced graphene oxide (APC/graphene) scaffold for sulfur infiltration...
September 20, 2017: Small
Keyu Xie, Kai Yuan, Xin Li, Wei Lu, Chao Shen, Chenglu Liang, Robert Vajtai, Pulickel Ajayan, Bingqing Wei
Potassium has its unique advantages over lithium or sodium as a charge carrier in rechargeable batteries. However, progresses in K-ion battery (KIB) chemistry have so far been hindered by lacking suitable electrode materials to host the relatively large K(+) ions compared to its Li(+) and Na(+) counterparts. Herein, molybdenum disulfide (MoS2 ) "roses" grown on reduced graphene oxide sheets (MoS2 @rGO) are synthesized via a two-step solvothermal route. The as-synthesized MoS2 @rGO composite, with expanded interlayer spacing of MoS2 , chemically bonded between MoS2 and rGO, and a unique nano-architecture, displays the one of the best electrochemical performances to date as an anode material for nonaqueous KIBs...
September 22, 2017: Small
Ulrike Kroesen, Christian Unkelbach, Daniel Schildbach, Carsten Strohmann
In this communication, a selective way and a better understanding to control the reaction of allylic amines with metalorganic bases depending on the amine handle as well as the metalorganic base is presented. Depending on the number of coordinating groups within the amine handle either a selective carbometalation or deprotonation reaction can be performed. By changing the alkali metal within the base from lithium to sodium or potassium, a change of chemoselectivity takes place and the reaction of piperidinoallylamine can be controlled...
September 21, 2017: Angewandte Chemie
Andrés Ricardo Pérez-Riera, Raimundo Barbosa-Barros, Rodrigo Daminello-Raimundo, Luiz Carlos de Abreu
Electrocardiographic artifacts are defined as electrocardiographic alterations, not related to cardiac electrical activity. As a result of artifacts, the components of the electrocardiogram (ECG) such as the baseline and waves can be distorted. Motion artifacts are due to shaking with rhythmic movement. Examples of motion artifacts include tremors with no evident cause, Parkinson's disease, cerebellar or intention tremor, anxiety, hyperthyroidism, multiple sclerosis, and drugs such as amphetamines, xanthines, lithium, benzodiazepines, or shivering (due to hypothermia, fever (rigor due to shaking), cardiopulmonary resuscitation by chest compression (oscillations of great amplitude) and patients who move their limbs during the test, causing sudden irregularities in the ECG baseline that may resemble premature contractions or interfere with ECG wave shapes, or other supraventricular and ventricular arrhythmias...
September 20, 2017: Annals of Noninvasive Electrocardiology
Kyeongse Song, Daniel Adjei Agyeman, Mihui Park, Junghoon Yang, Yong-Mook Kang
The development of next-generation energy-storage devices with high power, high energy density, and safety is critical for the success of large-scale energy-storage systems (ESSs), such as electric vehicles. Rechargeable sodium-oxygen (Na-O2 ) batteries offer a new and promising opportunity for low-cost, high-energy-density, and relatively efficient electrochemical systems. Although the specific energy density of the Na-O2 battery is lower than that of the lithium-oxygen (Li-O2 ) battery, the abundance and low cost of sodium resources offer major advantages for its practical application in the near future...
September 21, 2017: Advanced Materials
Ross McLellan, Alan R Kennedy, Robert E Mulvey, Samantha A Orr, Stuart D Robertson
Equipped with excellent hydrocarbon solubility, the lithium hydride surrogate 1-lithium-2-t-butyl-1,2-dihydropyridine (1tLi) functions as a precatalyst to convert Me₂NH·BH₃ to [NMe₂BH₂]₂ (89% conversion) under competitive conditions (2.5 mol%, 60h, 80°C, toluene solvent) to that of previously reported LiN(SiMe₃)₂. Sodium and potassium dihydropyridine congeners produce similar high yields of [NMe₂BH₂]₂ but require longer times. Switching the solvent to pyridine induces a remarkable change in the dehydrocoupling product ratio, with (NMe₂)₂BH favoured over [NMe₂BH₂]₂ (e...
September 21, 2017: Chemistry: a European Journal
Yanqun Ning, Xiaobing Lou, Chao Li, Xiaoshi Hu, Bingwen Hu
The controllable synthesis and structural tailoring of nanostructured metal organic frameworks (MOFs) is of huge significance in boosting their potential for rechargeable batteries. We herein present the facile synthesis of cobalt-based ultrathin metal- organic framework nanosheets (referred as "u-CoTDA") by using 2, 5-thiophenedicarboxylic (H2TDA) as the organic building block through a one-pot ultrasonic method for the first time. The obtained u-CoTDA exhibits high reversible capacity (790 mAh g-1 after 400 cycles at 1 A g-1) and excellent rate capability (694 mAh g-1 at 2 A g-1), which outperforms its bulk counterpart...
September 21, 2017: Chemistry: a European Journal
Huanwen Wang, Changrong Zhu, Dongliang Chao, Qingyu Yan, Hong Jin Fan
Hybrid metal-ion capacitors (MICs) (M stands for Li or Na) are designed to deliver high energy density, rapid energy delivery, and long lifespan. The devices are composed of a battery anode and a supercapacitor cathode, and thus become a tradeoff between batteries and supercapacitors. In the past two decades, tremendous efforts have been put into the search for suitable electrode materials to overcome the kinetic imbalance between the battery-type anode and the capacitor-type cathode. Recently, some transition-metal compounds have been found to show pseudocapacitive characteristics in a nonaqueous electrolyte, which makes them interesting high-rate candidates for hybrid MIC anodes...
September 22, 2017: Advanced Materials
Gabriel R Fries, Gabriela D Colpo, Nancy Monroy-Jaramillo, Junfei Zhao, Zhongming Zhao, Jodi G Arnold, Charles L Bowden, Consuelo Walss-Bass
Lithium is the most commonly prescribed medication for the treatment of bipolar disorder (BD), yet the mechanisms underlying its beneficial effects are still unclear. We aimed to compare the effects of lithium treatment in lymphoblastoid cell lines (LCLs) from BD patients and controls. LCLs were generated from sixty-two BD patients (based on DSM-IV) and seventeen healthy controls matched for age, sex, and ethnicity. Patients were recruited from outpatient clinics from February 2012 to October 2014. LCLs were treated with 1mM lithium for 7 days followed by microarray gene expression assay and validation by real-time quantitative PCR...
September 19, 2017: European Neuropsychopharmacology: the Journal of the European College of Neuropsychopharmacology
Natan R Kahan, Barbara Silverman, Irena Liphshitz, Dan-Andrei Waitman, Itzhak Ben-Zion, Alexander M Ponizovsky, Abraham Weizman, Alexander Grinshpoon
An association between bipolar disorder (BD) and cancer risk has been reported. The purpose of this study was to investigate this association through linkage analysis of a national HMO database and a national cancer registry. All members of the Leumit Health Services (LHS) HMO of Israel from 2000 to 2012 were included. Members with a recorded diagnosis of BD and a record of at least one written or dispensed prescription for pharmacotherapy for treatment of BD were classified as patients with BD. We linked the LHS population with the Israel National Cancer Registry database to capture all cases of cancer reported...
September 21, 2017: International Clinical Psychopharmacology
Dong Ren, Yun Shen, Yao Yang, Luxi Shen, Barnaby D A Levin, Yingchao Yu, David A Muller, Héctor D Abruña
Ni-rich LiNixMnyCo1-x-yO2 (x>0.5) (NMC) materials have attracted a great deal of interest as promising cathode candidates for Li-ion batteries (LIBs) due to their low cost and high energy density. However, several issues, including sensitivity to moisture, difficulty in reproducibly preparing well-controlled morphology particles and, poor cyclability, have hindered their large scale deployment; especially for electric vehicle (EV) applications. In this work, we have developed a uniform, highly stable, high-energy density, Ni-rich LiNi0...
September 22, 2017: ACS Applied Materials & Interfaces
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