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Anna Maier, Joerg Heil, Anna Lauer, Aba Harcos, Benedikt Schaefgen, Alexandra von Au, Julia Spratte, Fabian Riedel, Geraldine Rauch, André Hennigs, Christoph Domschke, Sarah Schott, Joachim Rom, Florian Schuetz, Christof Sohn, Michael Golatta
PURPOSE: Breast ultrasound could be a valuable tool complementary to mammography in breast cancer screening. Automated 3D breast ultrasound (ABUS) addresses challenges of hand-held ultrasound and could allow double reading analysis of ultrasound images. This trial assesses the inter-rater reliability and double reading analysis of an ABUS system. METHODS: To assess the reproducibility and diagnostic validity of the ABUS system, SomoV™, a blinded double reading analysis, was performed in 1019 patients (2038 breasts) by two examiners (examiner A/B) and compared to single reading results, as well as to the reference standard regarding its diagnostic validity...
July 26, 2017: Archives of Gynecology and Obstetrics
Jianhua Hou, Zhixiong Yang, Zhiru Li, Haoyu Chai, Ruiqi Zhao
We designed nine endohedral dodecahedrane heterodimers H@C20Hn-C20Hn@M (M = Cu, Ag, and Au, n = 15, 18, and 19) that may act as single-molecule spin switches, and we predicted theoretically that the ground states of the dimmers shift from low-spin states (S = 0) to the high-spin states (S = 1) under an external electric field applied parallel or perpendicular to the molecular symmetry axes, consisting well with the analyses of Stark effect. Molecular orbitals analyses provide an intuitive insight into the spin crossover behavior...
August 2017: Journal of Molecular Modeling
Kshirodra Kumar Patra, Bela D Bhuskute, Chinnakonda S Gopinath
Any solar energy harvesting technology must provide a net positive energy balance, and artificial leaf concept provided a platform for solar water splitting (SWS) towards that. However, device stability, high photocurrent generation, and scalability are the major challenges. A wireless device based on quasi-artificial leaf concept (QuAL), comprising Au on porous TiO2 electrode sensitized by PbS and CdS quantum dots (QD), was demonstrated to show sustainable solar hydrogen (490 ± 25 µmol/h (corresponds to 12 ml H2 h(-1)) from ~2 mg of photoanode material coated over 1 cm(2) area with aqueous hole (S(2-)/SO3(2-)) scavenger...
July 26, 2017: Scientific Reports
Arianna Tucci, Veronica Saletti, Francesca Menni, Claudia Cesaretti, Giulietta Scuvera, Silvia Esposito, Giulia Melloni, Susanna Esposito, Donatella Milani, Cristina Cereda, Mario Cigada, Laura Tresoldi, Francesco Viola, Federica Natacci
Neurofibromatosis type 1 (NF1) is an hereditary disorder characterized by abnormal proliferation of multiple tissues of neural crest origin, and presents mainly with multiple café-au-lait macules, axillary freckling and neurofibromas. Choroidal involvement in NF1 patients has been studied, thanks to the development of non-invasive tools such as infrared monochromatic light during fundus examination, which showed bright patchy lesions consistent with choroidal nodules. Choroidal abnormalities identified with near-infrared reflectance have reported with a frequency of up to 100% in NF1, and have been recently been proposed as a novel diagnostic criterion for NF1...
July 27, 2017: Journal of Human Genetics
Pengfei Shi, Yuanchao Zhang, Zhaopeng Yu, Shusheng Zhang
A sensitive, selective and recyclable electrochemical sensor is designed for ATP detection based on amino-functionalized metal-organic framework. The functional MOF as the sensor is constructed by one-step synthesis Ce-MOF and sequentially modified on the Au electrode and conjugated with the aptamer of ATP. The presence of target ATP leads to the conformational change of aptamer strands and strong electrochemical impedance. The electrochemical sensor can detect ATP down to 5.6 nM with the linear range of 10 nm to 1000 μM...
July 26, 2017: Scientific Reports
Caroline Giezenaar, Laurence G Trahair, Natalie D Luscombe-Marsh, Trygve Hausken, Scott Standfield, Karen L Jones, Kylie Lange, Michael Horowitz, Ian Chapman, Stijn Soenen
Background: Protein- and energy-rich supplements are used widely for the management of malnutrition in the elderly. Information about the effects of protein on energy intake and related gastrointestinal mechanisms and whether these differ between men and women is limited.Objective: We determined the effects of whey protein on energy intake, appetite, gastric emptying, and gut hormones in healthy older men and women.Design: Eight older women and 8 older men [mean ± SEM age: 72 ± 1 y; body mass index (in kg/m(2)): 25 ± 1] were studied on 3 occasions in which they received protein loads of 30 g (120 kcal) or 70 g (280 kcal) or a flavored water control drink (0 kcal)...
July 26, 2017: American Journal of Clinical Nutrition
Beibei Wang, Xueping Ji, Jujie Ren, Ruixing Ni, Lin Wang
A simple, ultrasensitive peroxynitrite anion (ONOO(-)) electrochemical sensing platform was developed by immobilizing hemin on a density controllable electrochemically reduced graphene oxide-Au nanoparticles (ERGO-AuNPs) nanohybrids. The ERGO-AuNPs in situ nanohybrids were produced onto a glass carbon electrode (GCE) by one-step electrodeposition, the density of which could be easily controlled by electrodeposited time. The morphology of ERGO-AuNPs nanohybrids was characterized by a scanning electron microscope (SEM)...
July 15, 2017: Bioelectrochemistry
Oksana Hamidi, William F Young, Lucinda Gruber, John Smestad, Qi Yan, Oscar J Ponce, Larry Prokop, M Hassan Murad, Irina Bancos
OBJECTIVE: The outcomes of patients with metastatic phaeochromocytoma (PHEO) and paraganglioma (PGL) are unclear. We performed a systematic review and meta-analysis of baseline characteristics and mortality rates of patients with metastatic PHEO and PGL (PPGL). DESIGN: Ovid Medline In-Process & Other Non-Indexed Citations, Ovid MEDLINE, Ovid EMBASE, Ovid Cochrane Central Register of Controlled Trials, Ovid Cochrane Database of Systematic Reviews, Scopus, Web of Science, and references of key articles were searched from inception to 2016...
July 26, 2017: Clinical Endocrinology
Bing Wang, Gang Chen, Julie Ratcliffe, Hossein Haji Ali Afzali, Lynne Giles, Helen Marshall
OBJECTIVES: The importance of adolescent engagement in health decisions and public health programs such as immunisation is becoming increasingly recognised. Understanding adolescent preferences and further identifying barriers and facilitators for immunisation acceptance is critical to the success of adolescent immunisation programs. This study applied a discrete choice experiment (DCE) to assess vaccination preferences in adolescents. METHODS: This study was conducted as a cross-sectional, national online survey in Australian adolescents...
2017: PloS One
Felix S Geitner, Jasmin V Dums, Thomas F Fässler
Reactions of silylated clusters [Ge9{Si(TMS)3}3](-) or [Ge9{Si(TMS)3}2](2-) with dialkylhalophosphines R2PCl (Cy, iPr, tBu) at ambient temperature yield the first tetrel Zintl cluster compounds bearing phosphine moieties. Varying reactivity of the dialkylhalophosphines towards the silylated clusters is observed depending on the bulkiness of the phosphine´s alkyl substituents and on the number of hypersilyl groups at the tetrel cluster. Reactions between phosphines with small cyclohexyl (Cy) or isopropyl- (iPr) groups and the tris-silylated cluster [Ge9{Si(TMS)3}3](-) yield the novel neutral cluster compounds [Ge9{Si(TMS)3}3PR2] (R: Cy (1), iPr (2)) with discrete Ge-P exo bonds...
July 26, 2017: Journal of the American Chemical Society
Nailiang Yang, Claire Deeb, Jean-Luc Pelouard, Nordin Felidj, Marie-Paule Pileni
Hydrophobic Au nanocrystal assemblies (both ordered and amorphous) were dispersed in aqueous solution via the assistance of lipid vesicles. The intertwine between vesicles and Au assemblies was made possible through a careful selection of the length of alkyl chains on Au nanocrystals. Extinction spectra of Au assemblies showed two peaks that were assigned to a scattering mode that red-shifted with increasing the assembly size and an absorption mode associated with localized surface plasmon, that was independent of their size...
July 26, 2017: ACS Nano
Shirley Siang Ning Tan, Alan Yean Yip Fong, Melissa Mejin, Jerry Gerunsin, Khai Liy Kong, Felicia Yien Yin Chin, Lee Len Tiong, Melissa Siaw Han Lim, Asri Said, Ning Zan Khiew, Chi Yen Voon, Nor Hanim Mohd Amin, Yee Ling Cham, Keng Tat Koh, Yen Yee Oon, Tiong Kiam Ong
BACKGROUND: Patients undergoing elective percutaneous coronary intervention (PCI) with drug-eluting stents (DES) who have impaired clopidogrel response, have a higher risk of subsequent major adverse cardiovascular events (MACE). AIM OF THE STUDY: To establish the relationship between CYP2C19 genotype, clopidogrel responsiveness and 1-year MACE. MATERIALS & METHODS: Aspirin/clopidogrel responses were assessed with Multiplate Analyzer and CYP2C19*2 allele by SpartanRx...
July 26, 2017: Pharmacogenomics
Wenxiang Li, Liang Hu, Jinghua Zhu, Dan Li, Yafei Luan, Wenwen Xu, Michael J Serpe
In this submission, the phase transition behavior for poly(N-isopropylacrylamide-co-acrylic acid) (pNIPAm-co-AAc) microgels and their assemblies was investigated as a function of temperature and pH using UV-vis spectroscopy (to probe light scattering behavior) and quartz crystal microbalance with dissipation (QCM-D) measurements. PNIPAm-co-AAc microgels were "painted" onto Au-coated glass substrates (for UV-vis) and the Au electrode of a QCM crystal to generate monolayers. The subsequent deposition of another Au layer on top of the pNIPAm-co-AAc microgel layer yields what is known as an etalon...
July 26, 2017: ACS Applied Materials & Interfaces
Xiaoran Deng, Kai Li, Xuechao Cai, Bin Liu, Yi Wei, Kerong Deng, Zhongxi Xie, Zhijian Wu, Ping'an Ma, Zhiyao Hou, Ziyong Cheng, Jun Lin
It is of great importance in drug delivery to fabricate multifunctional nanocarriers with intelligent targeting properties, for cancer diagnosis and therapy. Herein, hollow-structured CuS@Cu2 S@Au nanoshell/satellite nanoparticles are designed and synthesized for enhanced photothermal therapy and photoswitchable targeting theranostics. The remarkably improved photothermal conversion efficiency of CuS@Cu2 S@Au under 808 nm near-infrared (NIR) laser irradiation can be explained by the reduced bandgap and more circuit paths for electron transitions for CuS and Cu2 S modified with Au nanoparticles, as calculated by the Vienna ab initio simulation package, based on density functional theory...
July 26, 2017: Advanced Materials
Javier Ruiz, Lucía García, Marilín Vivanco, Daniel Sol, Santiago García-Granda
A variety of half-sandwich iron(ii) complexes with diprotic acyclic diaminocarbene ligands (pADCs) have been obtained by reaction of the cationic complexes [Fe(Cp)(CO)2(CNR)](+) and [Fe(Cp)(CO)(CNR)2](+) with methylamine, and their acid-base behaviour was studied, revealing an easy reversible deprotonation reaction of both N-H moieties of the carbene ligands. The deprotonation process is frequently followed by a nucleophilic attack of the nitrogen atom on a vicinal carbonyl or isocyanide ligand, affording the corresponding metallacycles...
July 26, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
Jia-Ying Xin, Hong-Chen Fan, Sheng-Fu Ji, Yan Wang, Chun-Gu Xia
A green bioreductive approach with methanobactin was adopted to fabricate bimetallic Au-Pd/Al2O3 catalysts for solvent-free oxidation of glucose to gluconic acid with H2O2 at atmospheric pressure. The catalyst was characterised by diffuse reflectance UV-vis spectroscopy, transmission electron microscopy, X-ray photoelectron spectroscopy, and X-ray diffraction techniques to understand synergistic interactions between Au and Pd. Effects of Au to Pd molar ratio on the catalytic activity of Au-Pd/Al2O3 were investigated...
August 2017: IET Nanobiotechnology
Fangyuan Wang, Xiaoling Gu, Chunchen Zheng, Fang Dong, Liying Zhang, Yueqing Cai, Zhengyi You, Junhui You, Shuhu Du, Zhongping Zhang
Surface-enhanced Raman scattering (SERS) by use of noble metal nanoparticles has become a powerful tool to determine a low-concentration target by unique spectral fingerprints, but it is still limited to the Raman-inactive and non-resonant biomolecules such as amine acids, proteins and hormones. Here, we report an Ehrlich-reaction-based derivative strategy in combination with Au nanoparticles (Au NPs) hotspots for the selective detection of indole-like plant hormones by SERS spectroscopy. Ehrlich reaction of p-(dimethylamino)benzaldehyde (PDAB) with indole ring chemically transformed plant hormone indole-3-butyric acid (IBA) into a Raman-active and resonant derivative with an extended π-conjugated system in the form of cation, which produced a new absorption band at 626 nm...
July 26, 2017: Analytical Chemistry
Junbo Li, Sheng Zou, Jiayu Gao, Ju Liang, Huiyun Zhou, Lijuan Liang, Wenlan Wu
BACKGROUND: Polymer surface-modified inorganic nanoparticles (NPs) provide a multifunctional platform for assisting gene delivery. Rational structure design for enhancing colloidal stability and cellular uptake is an important strategy in the development of safe and highly efficient gene vectors. RESULTS: Heterogeneous Au-coated Fe3O4 (Fe3O4@Au) NPs capped by polyethylene glycol-b-poly1-(3-aminopropyl)-3-(2-methacryloyloxy propylimidazolium bromine) (PEG-b-PAMPImB-Fe3O4@Au) were prepared for DNA loading and magnetofection assays...
July 25, 2017: Journal of Nanobiotechnology
Christian Humpel, Thomas Benke
Clinical diagnosis of Creutzfeldt-Jakob disease (CJD) can be supported by the analysis of Tau and 14-3-3 in the cerebrospinal fluid (CSF). In this short report, we report about a retrospective analysis performed on 2,296 routinely collected CSF samples, and 44 samples with a ratio of phosphoTau181/Tau <0.075 were selected. Analysis was performed with a novel 14-3-3 gamma CircuLex Elisa. We show that control levels were around 6,000 AU/mL and samples from Alzheimer patients were not different from those collected from healthy controls...
July 26, 2017: Pharmacology
Serena P Koenig, Nancy Dorvil, Jessy G Dévieux, Bethany L Hedt-Gauthier, Cynthia Riviere, Mikerlyne Faustin, Kerlyne Lavoile, Christian Perodin, Alexandra Apollon, Limathe Duverger, Margaret L McNairy, Kelly A Hennessey, Ariadne Souroutzidis, Pierre-Yves Cremieux, Patrice Severe, Jean W Pape
BACKGROUND: Attrition during the period from HIV testing to antiretroviral therapy (ART) initiation is high worldwide. We assessed whether same-day HIV testing and ART initiation improves retention and virologic suppression. METHODS AND FINDINGS: We conducted an unblinded, randomized trial of standard ART initiation versus same-day HIV testing and ART initiation among eligible adults ≥18 years old with World Health Organization Stage 1 or 2 disease and CD4 count ≤500 cells/mm3...
July 2017: PLoS Medicine
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