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https://www.readbyqxmd.com/read/28535028/preparation-of-highly-thermally-conductive-polymer-composite-at-low-filler-content-via-a-self-assembly-process-between-polystyrene-microsphere-and-boron-nitride-nanosheet
#1
Xiongwei Wang, Peiyi Wu
Rational distribution and orientation of boron nitride nanosheets (BNNSs) are very significant for a polymer/BNNS composite to obtain a high thermal conductivity at low filler content. In this paper, a high-performance thermal interface material based on exfoliated BNNSs and polystyrene microspheres was fabricated by latex blending and subsequent compression molding. In this case, BNNSs and polystyrene (PS) microspheres would firstly self-asemble to form the complex microspheres via strong electrostatic interactions between them...
May 23, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28534912/prediction-on-the-light-assisted-exfoliation-of-multilayered-arsenene-by-the-photo-isomerization-of-azobenzene
#2
Jun Zhao, Chunyan Liu, Wanlin Guo, Jing Ma
The exfoliation of gray arsenic into single- or few-layered arsenene is a challenge of utmost importance. We propose here that the conformational change in the photo-isomerization of azobenzene-based photochromes might be used to promote the exfoliation of multilayered arsenene. Our density functional theory calculations show that the trans-to-cis conformational change can lead to an increase of the adjacent interlayer distance of arsenene from 6.59 Å to 11.07 Å. Starting from the transition state, the azobenzene molecule can be isomerized into the more stable trans form based on further ab initio molecular dynamics simulations...
May 23, 2017: Nanoscale
https://www.readbyqxmd.com/read/28534567/intrinsic-ferromagnetism-and-quantum-anomalous-hall-effect-in-a-cobr2-monolayer
#3
Peng Chen, Jin-Yu Zou, Bang-Gui Liu
The electronic, magnetic, and topological properties of a CoBr2 monolayer are studied in the framework of density-functional theory (DFT) combined with tight-binding (TB) modeling in terms of the Wannier basis. Our DFT investigation and Monte Carlo simulation show that there exists intrinsic two-dimensional ferromagnetism in the CoBr2 monolayer, thanks to the large out-of-plane magnetocrystalline anisotropic energy. Our further study indicates that the spin-orbit coupling makes it become a topologically nontrivial insulator with a quantum anomalous Hall effect and topological Chern number [script C] = 4 and its edge states can be manipulated by changing the width of its nanoribbons and applying strains...
May 23, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28534561/dielectrophoretic-assembly-of-liquid-phase-exfoliated-tis3-nanoribbons-for-photodetecting-applications
#4
R Frisenda, E Giovanelli, P Mishra, P Gant, E Flores, C Sánchez, J R Ares, D Perez de Lara, I J Ferrer, E M Pérez, A Castellanos-Gomez
Liquid-phase exfoliation is a technique capable of producing large quantities of two-dimensional materials in suspension. Despite many efforts in the optimization of the exfoliation process itself, not much has been done towards the integration of liquid-phase-exfoliated materials in working solid-state devices. In this article, we use dielectrophoresis to direct the assembly of liquid-phase-exfoliated TiS3 nanoribbons between two gold electrodes to produce photodetectors working in the visible region. Through electrical and optical measurements we characterize the responsivity of the device and we find values as large as 3...
May 23, 2017: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/28530322/-oro-dento-facial-manifestations-in-patients-with-familial-dysautonomia
#5
REVIEW
Eliyahu Mass
The oro-dento-facial features and dysfunctions of children with hereditary sensory and autonomic neuropathy type III (HSAN III), known as familial dysautonomia (FD) or Riley-Day syndrome, were first described in the scientific literature in 1949. They include: dental trauma, dental and soft tissue selfmutilation, normal dental age, normal sequence and timing of eruption and exfoliation of teeth, smaller tooth size, different and disproportional tooth components, normal alveolar bone height, small jaws, mild crowding and malocclusion...
August 2016: Harefuah
https://www.readbyqxmd.com/read/28529600/prospective-evaluation-of-fluorescence-in-situ-hybridization-for-diagnosing-urothelial-carcinoma
#6
Tianhai Lin, Zhenhua Liu, Liangren Liu, Lu Yang, Ping Han, Peng Zhang, Qiang Wei
Urothelial carcinoma (UC) is the most common type of cancer of the bladder and upper urinary tract, and is characterized by a high risk of recurrence and progression. Urine fluorescence in situ hybridization (FISH) is a technique that detects genetic aberrations in exfoliated cells in the urine, with specific probes for chromosomes 3, 7 and 17 and the p16 gene. To evaluate the diagnostic value of FISH in UC, 119 patients from November 2010 to June 2012 with suspected UC were recruited into a prospective, cross-sectional study and were followed up for 12-30 months...
May 2017: Oncology Letters
https://www.readbyqxmd.com/read/28524814/genotoxic-and-cytotoxic-effects-in-exfoliated-buccal-and-nasal-cells-of-chromium-and-cobalt-exposed-electroplaters
#7
Georg Wultsch, Armen Nersesyan, Michael Kundi, Miroslav Mišík, Tahereh Setayesh, Monika Waldherr, Pavel Vodicka, Ludmila Vodickova, Siegfried Knasmüller
Results of a number of studies indicate that electroplaters have increased cancer risks as a consequence of exposure to genotoxic metals such as chromium (VI) and nickel. These effects may be due to induction of damage of the genetic material which plays a key role in the etiology of cancer, and it was found that workers in galvanization factories exhibited increased levels of DNA damage. The aim of the present study was to investigate genetic stability in workers of a bright plating factory who are exposed to chromium (Cr) and cobalt (Co)...
May 19, 2017: Journal of Toxicology and Environmental Health. Part A
https://www.readbyqxmd.com/read/28524004/urinary-biomarkers-for-prostate-cancer
#8
Francesca Giunchi, Chiara Ciccarese, Rodolfo Montironi, Marina Scarpelli, Antonio Lopez-Beltran, Liang Cheng, Holger Moch, Francesco Massari, Michelangelo Fiorentino
Urine may represent a convenient source of biomarkers for the early detection of prostate cancer (PCa) since contains secreted prostatic products and exfoliated tumor cells. Furthermore urine are easy to collect with non-invasive procedures and they are repeatable. Several urinary biomarkers for PCa have been proposed in the past but only one (PCA3) has been approved for clinical use and even this is not widely utilized in the routine practice. Most of these, particularly the proteins, were abandoned due to lack of confirmation...
May 18, 2017: Current Drug Metabolism
https://www.readbyqxmd.com/read/28516900/facile-preparation-of-protonated-hexaniobate-nanosheets-and-its-enhanced-photocatalytic-activity
#9
Xiaobin Liu, Wenxiu Que, Peng Chen, Yapeng Tian, Jie Liu, Zuoli He, Huanfu Zhou, Ling Bing Kong
Exfoliated hexaniobate nanosheets E-H2K2Nb6O17-x (E-HKNO) with broad light absorption (up to 850 nm) and high adsorption properties were prepared via ion exchange and transient annealing processes with micron-size K4Nb6O17 powders as the precursor. The as-prepared E-HKNO nanosheets show excellent visible light photodegradation performances when compared to degussa P25, which was evaluated in terms of degradation of Rhodamine B (Rh B). High adsorption and broad light absorption characteristics could be attributed to the exfoliation behavior and the reduction of surface Nb(5+) to Nb(4+), which was confirmed by x-ray photoelectron spectroscopy (XPS) and Raman spectra...
May 18, 2017: Nanotechnology
https://www.readbyqxmd.com/read/28515910/biocompatibility-of-biological-material-polylactic-acid-with-stem-cells-from-human-exfoliated-deciduous-teeth
#10
Xi Wang, Guanghui Li, Yiming Liu, Weiwei Yu, Qiang Sun
To investigate the biocompatibility of the biomaterial, polylactic acid (PLA) with stem cells from human exfoliated deciduous teeth (SHED) and its induction of mineralization as a type of scaffold material. To determine the impacts of biomaterial PLA on proliferation and mineralization of SHED, the expression of surface molecules of SHED isolated and cultured in vitro was detected by flow cytometry. In addition, cell proliferation was measured using MTT and Edu assays, and the evaluation of mineralized differentiation was performed using Alizarin Red S staining...
May 2017: Biomedical Reports
https://www.readbyqxmd.com/read/28515214/assessment-of-a-new-lower-cost-real-time-pcr-detection-assay-for-high-risk-hpv-useful-for-cervical-screening-in-limited-resource-settings
#11
Joel Fokom Domgue, Mark Schiffman, Nicolas H Wentzensen, Julia C Gage, Philip E Castle, Tina R Raine-Bennett, Barbara Fetterman, Thomas Lorey, Nancy E Poitras, Brian Befano, Yi Xie, Lais S Miachon, Michael Dean
Background Inexpensive and easy-to-perform HPV tests are needed for primary cervical cancer screening in lower-resource regions.Methods In a convenience sample of 516 residual exfoliative cervical specimens from the Kaiser Permanente Northern California and US National Cancer Institute Persistence and Progression study, we compared agreement and clinical performance of a simple, inexpensive real-time PCR assay for detection of 13 carcinogenic HPV types (H13, Hybribio, Hong Kong) that is marketed in limited resource settings, to previous testing by HC2 (Qiagen, Germantown, MD) and Onclarity (BD Diagnostics, Sparks, MD)...
May 17, 2017: Journal of Clinical Microbiology
https://www.readbyqxmd.com/read/28513639/strong-enhancement-of-electrical-conductivity-in-two-dimensional-micrometer-sized-ruo2-nanosheets-for-flexible-transparent-electrodes
#12
Somi Yoo, Jeongmin Kim, Hongjae Moon, Se Yun Kim, Dong-Su Ko, Weon Ho Shin, Sungwoo Hwang, Doh Won Jung, Soohwan Sul, Chan Kwak, Jong Wook Roh, Wooyoung Lee
The enhancement in electrical transport properties of exfoliated individual RuO2 NSs was systemically investigated for their application in flexible electronics and optoelectronics. Decoration of Ag NPs on the surface of the RuO2 NSs provides donor electrons and dramatically increases the electrical conductivity of the monolayer RuO2 NSs by up to 3700%. The n-type doping behavior was confirmed via Hall measurement analysis of the doped RuO2 NSs. The layer number- and temperature-dependence of the conductivity were also investigated...
May 17, 2017: Nanoscale
https://www.readbyqxmd.com/read/28513537/computational-predictions-for-single-chain-chalcogenide-based-one-dimensional-materials
#13
Blair Tuttle, Saeed Alhassan, Sokrates Pantelides
Exfoliation of multilayered materials has led to an abundance of new two-dimensional (2D) materials and to their fabrication by other means. These materials have shown exceptional promise for many applications. In a similar fashion, we can envision starting with crystalline polymeric (multichain) materials and exfoliate single-chain, one-dimensional (1D) materials that may also prove useful. We use electronic structure methods to elucidate the properties of such 1D materials: individual chains of chalcogens, of silicon dichalcogenides and of sulfur nitrides...
May 17, 2017: Nanomaterials
https://www.readbyqxmd.com/read/28513130/anisotropic-friction-of-wrinkled-graphene-grown-by-chemical-vapor-deposition
#14
Fei Long, Poya Yasaei, Wentao Yao, Amin Salehi-Khojin, Reza Shahbazian-Yassar
Wrinkle structures are commonly seen on graphene grown by chemical vapor deposition (CVD) method due to the different thermal expansion coefficient between graphene and its substrate. Despite the intensive investigations focusing on the electrical properties, the nano-tribological properties of wrinkles and the influence of wrinkle structures on the wrinkle free graphene remain less understood. Here, we report the observation of anisotropic nanoscale frictional characteristics depending on the orientation of wrinkles in CVD-grown graphene...
May 17, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28510799/practical-surgical-techniques-for-lymphadenectomy-along-the-right-recurrent-laryngeal-nerve-during-thoracoscopic-esophagectomy-in-the-prone-position
#15
Taro Oshikiri, Tetsu Nakamura, Yukiko Miura, Hiroshi Hasegawa, Masashi Yamamoto, Shingo Kanaji, Kimihiro Yamashita, Yoshiko Matsuda, Takeru Matsuda, Yasuo Sumi, Satoshi Suzuki, Yoshihiro Kakeji
BACKGROUND: In esophageal squamous cell cancer (SCC), lymphadenectomy along the right recurrent laryngeal nerve (RLN) is important for disease control. The metastatic rate was 33% and the 5-year overall survival rate of these patients was 33.3%,1 but the risk of RLN palsy increases.2 We reported a reliable new method ('Pincers Maneuver')3 for lymphadenectomy along the right RLN during thoracoscopic esophagectomy in the prone position (TEP), and hereby present our video, aimed at providing a complete and safe dissection...
May 16, 2017: Annals of Surgical Oncology
https://www.readbyqxmd.com/read/28509556/structure-based-selective-adsorption-of-graphene-on-a-gel-surface-towards-improving-the-quality-of-graphene-nanosheets
#16
Takaaki Tomai, Shunichi Ishiguro, Naoki Tamura, Yuta Nakayasu, Itaru Honma
Top-down graphene production via exfoliation from graphite produces a mass of graphene with structural variation in terms of the number of layers, sheet size, edge type, and defect density. All these characteristics affect its electronic structure. In order to develop useful applications of graphene, structural separation of graphene is necessary. In this study, we investigate the adsorption behavior of different types of graphene fragments using a multicolumn gel chromatography system with a view to developing an efficient method for separating high-quality graphene...
May 16, 2017: Langmuir: the ACS Journal of Surfaces and Colloids
https://www.readbyqxmd.com/read/28507723/p-doping-of-graphene-in-hybrid-materials-with-3-10-diazapicenium-dications
#17
Alexandra Roth, Tobias A Schaub, Ute Meinhardt, Dominik Thiel, Jan Storch, Vladimír Církva, Pavel Jakubík, Dirk M Guldi, Milan Kivala
N,N'-Didodecyl-substituted 3,10-diazapicenium salts featuring bromide and hexafluorophosphate counterions have been designed as novel dopants to realize individualized graphene sheets in a series of cutting edge experiments and to intrinsically stabilize them via p-doping. Importantly, electrochemical studies revealed two consecutive irreversible one-electron reductions of the N,N'-didodecyl-substituted 3,10-diazapicenium salts to yield the corresponding radical cation and neutral quinoidal species. Formation of both species was accompanied by characteristic changes in the absorption spectra...
May 1, 2017: Chemical Science
https://www.readbyqxmd.com/read/28505344/genetics-of-glaucoma
#18
Janey L Wiggs, Louis R Pasquale
Genetic and genomic studies, including genome-wide association studies (GWAS) have accelerated the discovery of genes contributing to glaucoma, the leading cause of irreversible blindness world-wide. Glaucoma can occur at all ages, with Mendelian inheritance typical for rare early onset disease (before age 40) and complex inheritance evident in common adult-onset forms of disease. Recent studies have suggested possible therapeutic targets for some patients with early-onset glaucoma based on the molecular and cellular events caused by MYOC, OPTN and TBK1 mutations...
May 15, 2017: Human Molecular Genetics
https://www.readbyqxmd.com/read/28505207/immuno-related-polymorphisms-and-cervical-cancer-risk-the-iarc-multicentric-case-control-study
#19
James McKay, Vanessa Tenet, Silvia Franceschi, Amélie Chabrier, Tarik Gheit, Valérie Gaborieau, Sandrine Chopin, Patrice H Avogbe, Massimo Tommasino, Michelle Ainouze, Uzma Hasan, Salvatore Vaccarella
A small proportion of women who are exposed to infection with human-papillomavirus (HPV) develop cervical cancer (CC). Genetic factors may affect the risk of progression from HPV infection to cervical precancer and cancer. We used samples from the International Agency for Research on Cancer (IARC) multicentric case-control study to evaluate the association of selected genetic variants with CC. Overall, 790 CC cases and 717 controls from Algeria, Morocco, India and Thailand were included. Cervical exfoliated cells were obtained from control women and cervical exfoliated cells or biopsy specimens from cases...
2017: PloS One
https://www.readbyqxmd.com/read/28501216/intracellular-dna-and-microrna-sensing-based-on-metal-organic-framework-nanosheets-with-enzyme-free-signal-amplification
#20
Wen-Jun Song
A new fluorescent sensing platform based on ultrathin metal-organic framework (MOF) nanosheets (MnDMS) was prepared from the flexible ligand 2,2-dimethylsuccinate and Mn ions. The MnDMS nanoparticles can be obtained by simply ultrasonication of the MnDMS crystal, and then can be exfoliated into nanosheets by Li-intercalation method. The MnDMS nanosheets can be easily assembled with biological probes, leading to efficient fluorescence quenching of the fluorophore tagged ssDNA and microRNA (miRNA). By using a hybridization chain reaction (HCR) strategy, the fluorescence signal can be obviously amplified...
August 1, 2017: Talanta
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