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Xiaoyang Pan, Chao Li, Jing Zheng, Shijing Liang, Rong Huang, Zhiguo Yi
Noble metal nanoparticles have attracted considerable attention due to their useful capabilities as heterogeneous catalysts. However, they are usually prepared using various organic stabilizing agents that negatively affect their catalytic activities. Herein, we report a facile, clean, and effective method for synthesizing supported ultrafine noble metal nanoparticles by utilizing the reductive property of a new pyrochlore oxide: Sn1.06 Nb2 O5.59 F0.97 (SnNbOF). Ultrafine Au, Pd, and Pt nanoparticles or clusters are homogeneously distributed on the SnNbOF surface...
May 18, 2018: Inorganic Chemistry
Lina Li, Xiaoying Shang, Sasa Wang, Ningning Dong, Chengmin Ji, Xueyuan Chen, Sangen Zhao, Jun Wang, Zhihua Sun, Maochun Hong, Junhua Luo
Perovskite ferroelectrics with prominent nonlinear optical absorption have attracted great attention in the field of photonics. However, they are traditionally dominated by inorganic oxides and exhibit relatively small nonlinear optical absorption coefficients which hinder their further applications. Herein, we report a new organic-inorganic hybrid bilayered perovskite ferroelectric, (C4H9NH3)2(NH2CHNH2)Pb2Br7 (1), showing an above-room-temperature Curie temperature (~322 K) and notable spontaneous polarization (~3...
May 17, 2018: Journal of the American Chemical Society
Paul J J Hooykaas, G Paul H van Heusden, Xiaolei Niu, M Reza Roushan, Jalal Soltani, Xiaorong Zhang, Bert J van der Zaal
Two decades ago, it was discovered that the well-known plant vector Agrobacterium tumefaciens can also transform yeasts and fungi when these microorganisms are co-cultivated on a solid substrate in the presence of a phenolic inducer such as acetosyringone. It is important that the medium has a low pH (5-6) and that the temperature is kept at room temperature (20-25 °C) during co-cultivation. Nowadays, Agrobacterium-mediated transformation (AMT) is the method of choice for the transformation of many fungal species; as the method is simple, the transformation efficiencies are much higher than with other methods, and AMT leads to single-copy integration much more frequently than do other methods...
May 17, 2018: Current Topics in Microbiology and Immunology
Jing Zhang, Shiguo Han, Xitao Liu, Zhenyue Wu, Chengmin Ji, Zhihua Sun, Junhua Luo
We report a new lead-free perovskite-like hybrid, composed of hexamethyleneimine and one-dimensional [SbCl5]n2- polyanionic zigzag chains, which shows above-room-temperature switching of quadratic nonlinear optical (NLO) properties induced by the unique order-disorder conformational changes of the organic cation.
May 17, 2018: Chemical Communications: Chem Comm
Zehao Li, Xu Zhou, Lidan Li, Shue Liu, Congshan Wang, Lina Li, Changyuan Yu, Xin Su
Hybridization-based probes emerge as a promising tool for nucleic acid target detection and imaging. However, the single-nucleotide selectivity is still challenging because the specificity of hybridization reaction is typically low at room temperature. We disclose an effective and simple method for highly selective detection and in situ imaging of single-nucleotide mutation (SNM) by taking the advantages of the specific hybridization of short duplex and the signal amplifying effect of cationic conjugated polymer (CCP)...
May 16, 2018: Analytical Chemistry
Can Xin, Zhengwei Li, Jianjian Zhang, Zhongwei Xiong, Xiaolin Wu, Shiyu Zhao, Mingjun Cai, Wenyuan Zhao, Jincao Chen
BACKGROUND: Although clipping and coiling of intracranial aneurysms are effective treatment options, they each have respective limitations. With the advent of hybrid operating room, combined clipping and coiling for complex aneurysms at one stage becomes feasible. In this article, we report a successful case of a left posterior communicating artery (PCoA) aneurysm where combined clipping and endovascular treatment were applied. CASE DESCRIPTION: A 57-year-old man had been complaining of severe headache for 10 days...
May 12, 2018: World Neurosurgery
Xie Zhang, Jimmy-Xuan Shen, Chris G Van de Walle
Hybrid perovskites such as MAPbI3 (MA=CH3 NH3 ) exhibit a unique spin texture. The spin texture (as calculated within the Rashba effective model) has been suggested to be responsible for a suppression of radiative recombination due to a mismatch of spins at the band edges. Here we compute the spin texture from first principles and demonstrate that it does not suppress recombination. The exact spin texture is dominated by the inversion asymmetry of the local electrostatic potential, which is determined by the structural distortion induced by the MA molecule...
May 15, 2018: Journal of Physical Chemistry Letters
Junhui Lee, Jiwon Park, Ahra Go, Heesung Moon, Sujin Kim, Sohee Jung, Wonjoon Jeong, Heesun Chung
To intoxicated patients in the emergency room, toxicological analysis can be considerably helpful for identifying the involved toxicants. In order to develop a urine multi-drug screening (UmDS) method, gas chromatography-mass spectrometry (GC-MS) and liquid chromatography-tandem mass spectrometry (LC-MS-MS) were used to determine targeted and unknown toxicants in urine. A GC-MS method in scan mode was validated for selectivity, limit of detection (LOD) and recovery. An LC-MS-MS multiple reaction monitoring (MRM) method was validated for lower LOD, recovery and matrix effect...
May 14, 2018: Journal of Analytical Toxicology
Yuan Liu, Xiaodong Yan, Bingqing Xu, Jinle Lan, Yunhua Yu, Xiaoping Yang, Yuanhua Lin, Cewen Nan
Owing to their unique structural advantages, TiO2 hierarchical nanostructures assembled by low-dimensional (LD) building blocks have been extensively used in the energy-storage/-conversion field. However, it is still a big challenge to produce such advanced structures by current synthetic techniques due to the harsh conditions needed to generate primary LD subunits. Herein, a novel one-dimensional (1D) TiO2 hierarchical porous fibrous nanostructure constructed by TiO2 nanobelts is synthesized by combining a room-temperature aqueous solution growth mechanism with the electrospinning technology...
May 14, 2018: ACS Applied Materials & Interfaces
Cleo Keppens, Véronique Tack, Nils 't Hart, Lien Tembuyser, Ales Ryska, Patrick Pauwels, Karen Zwaenepoel, Ed Schuuring, Florian Cabillic, Luigi Tornillo, Arne Warth, Wilko Weichert, Elisabeth Dequeker
Biomarker analysis has become routine practice in the treatment of non-small cell lung cancer (NSCLC). To ensure high quality testing, participation to external quality assessment (EQA) schemes is essential. This article provides a longitudinal overview of the EQA performance for EGFR , ALK , and ROS1 analyses in NSCLC between 2012 and 2015. The four scheme years were organized by the European Society of Pathology according to the ISO 17043 standard. Participants were asked to analyze the provided tissue using their routine procedures...
April 17, 2018: Oncotarget
Konard Schuetze, A Eickhoff, C Dehner, M Schultheiss, F Gebhard, P H Richter
Hybrid-operating rooms enable the surgeon to acquire intraoperative high-resolution 2- and 3D images and use them for navigation. The radiation dose of the operating personal and the patient remains the major concern. In 9 months, 109 pelvic and spine cases were performed using a hybrid operating room. Radiation dose of the surgeon and the assisting nurse was recorded using real-time dosimeters. Lower radiation doses for the main surgeon in navigated dorsal instrumentations of the thoracic spine were recorded...
May 10, 2018: Journal of Robotic Surgery
Tian Carey, Chris Jones, Fred Le Moal, Davide Deganello, Felice Torrisi
Here we formulate low surface tension (~ 30 mN/m) and low boiling point (~ 79 °C) inks of graphene, single wall carbon nanotubes (SWNTs) and conductive polymer poly(3,4-ethylenedioxythiophene) poly(styrenesulfonate) (PEDOT:PSS) and demonstrate their viability for spray-coating of morphologically uniform (Sq ~ 48 ± 3 nm), transparent conducting films (TCFs) at room temperature (~ 20 °C), which conform to three dimensional (3D) curved surfaces. Large area (~ 750 cm2 ) hybrid PEDOT:PSS/graphene films achieved an optical transmission of 67% in the UV and 64% in the near-infrared (n-IR) wavelengths with a conductivity of ~104 S/m...
May 10, 2018: ACS Applied Materials & Interfaces
Hyeunhwan An, Dale Karas, Byung-Wook Kim, Sarah Trabia, Jaeyun Moon
Flexible thermoelectric (TE) materials, which are devices that convert thermal gradients to electrical energy, have attracted interest for practical energy-harvesting/recovery applications. However, as compared with p-type materials, the progress on the development of n-type TE flexible materials has been slow due to difficulties involved in n-type doping techniques. This study used high mobility carbon nanotubes (CNTs) to a uniformly mixed hybrid-composite, resulting in an enhanced power factor by increasing electrical conductivity...
July 6, 2018: Nanotechnology
Ido Cooperstein, Efrat Shukrun, Ofir Press, Alexander Kamyshny, Shlomo Magdassi
A sol, aqueous solution based ink is presented for fabrication of 3D transparent silica glass objects with complex geometries, by a simple 3D printing process conducted at room temperature. The ink combines a hybrid ceramic precursor that can undergo both photopolymerization reaction and a sol-gel process, both in a solution form, without any particles. The printing is conducted by localized photopolymerization with the use of a low-cost 3D printer. Following printing, upon aging and densifying, the resulting objects convert from a gel to a xerogel and then to a fused silica...
May 9, 2018: ACS Applied Materials & Interfaces
Jian-Zhen Liao, Lingyi Meng, Ji-Hui Jia, Dong Liang, Xu-Lin Chen, Rong-Min Yu, Xiao-Fei Kuang, Can-Zhong Lu
Room-temperature phosphorescence (RTP) was realized for the first time in a polyoxometalate-based charge-transfer (CT) hybrid material bearing polyoxometalates (POMs) as electron-donors (D) and rigid naphthalene diimides (NDIs) as electron-acceptors (A), meanwhile, this hybrid material displayed photochromism as well. The significant D-A anion-π interactions induced an additional through-space charge-transfer pathway. The resulting suitable D-A CT states can efficiently bridge the relatively large energy gap between the NDI-localized 1π-π* and 3π-π* states and thus trigger the ligand-localized phosphorescence (3π-π*)...
May 8, 2018: Chemistry: a European Journal
Jian Chen, Gang Ou, Ao Peng, Lingxiang Zheng, Jianghong Shi
For smartphone indoor localization, an INS/WiFi hybrid localization system is proposed in this paper. Acceleration and angular velocity are used to estimate step lengths and headings. The problem with INS is that positioning errors grow with time. Using radio signal strength as a fingerprint is a widely used technology. The main problem with fingerprint matching is mismatching due to noise. Taking into account the different shortcomings and advantages, inertial sensors and WiFi from smartphones are integrated into indoor positioning...
May 7, 2018: Sensors
A Karun, K K Sajini, K S Muralikrishna, M K Rajesh, F Engelmann
BACKGROUND: Cryopreservation opens new avenues in the field of genetic resource conservation, especially in recalcitrant seeded palms such as arecanut for which field genebanks are exposed to pest and disease attacks and natural calamities. It is only through cryopreservation that the safety of the conserved germplasm can be assured at a relatively low cost for extended periods. OBJECTIVE: The objective of this work was to standardize various aspects of arecanut pollen cryopreservation, viz...
November 2017: Cryo Letters
Andres Obeso, Calvin S H Ng
No abstract text is available yet for this article.
April 2018: Journal of Thoracic Disease
Ke-Cheng Chen, Jang-Ming Lee
Background: With the aid of electromagnetic navigation bronchoscopy (ENB), it has become possible to approach peripheral lung tumors from the airway. Meanwhile, local ablation using photodynamic therapy (PDT) has shown increasing promise in the realm of lung cancer treatment. The purpose of this study was to explore an alternative ablation method using PDT with SuperDimension ENB localization in a hybrid operating theater. Methods: Our study includes patients with primary or metastatic lung cancer who underwent PDT via ENB in the hybrid operating room (OR) of National Taiwan University Hospital between January 2016 and January 2017...
April 2018: Journal of Thoracic Disease
Margarita Kurochkina, Elena Konshina, Aleksandr Oseev, Soeren Hirsch
Background: The luminescence amplification of semiconductor quantum dots (QD) in the presence of self-assembled gold nanoparticles (Au NPs) is one of way for creating biosensors with highly efficient transduction. Aims: The objective of this study was to fabricate the hybrid structures based on semiconductor CdSe/ZnS QDs and Au NP arrays and to use them as biosensors of protein. Methods: In this paper, the hybrid structures based on CdSe/ZnS QDs and Au NP arrays were fabricated using spin coating processes...
2018: Nanotechnology, Science and Applications
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