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Liqiang Huang, Gang Wang, Weihua Zhou, Boyi Fu, Xiaofang Cheng, Lifu Zhang, Zhibo Yuan, Sixing Xiong, Lin Zhang, Yuanpeng Xie, Andong Zhang, Youdi Zhang, Wei Ma, Weiwei Li, Yinhua Zhou, Elsa Reichmanis, Yiwang Chen
High efficiency organic solar cells (OSCs) can be produced through optimization of component molecular design, coupled with interfacial engineering and control of active layer morphology. However, vertical stratification of the bulk-heterojunction (BHJ), a spontaneous activity which occurs during the drying process, remains an intricate problem yet to be solved. Routes toward regulating the vertical separation profile and evaluating the effects on the final device should be explored to further enhance the performance of OSCs...
April 20, 2018: ACS Nano
Yue-Xiao Xing, Ming-Hui Li, Liang Tao, Ling-Yu Ruan, Wei Hong, Cheng Chen, Wen-Long Zhao, Han Xu, Jian-Feng Chen, Jun-Song Wang
Hepatic carcinoma is one of the most common cancers in the world with a high incidence. Emodin is an anthraquinone derived from Polygonum multiflorum Thunb, possessing anti-cancer activity. The purpose of this study is to investigate the anti-cancer effect of different dosages of emodin on HepG2 cells using 1H-NMR based metabolic approach complemented with qRT-PCR and flow cytometry to identify potential markers and discover the targets to explore the underlying mechanism. Emodin can dose-dependently inhibit the growth of HepG2 cells, perturb cell cycle progression, down-regulate the expression of genes and proteins related to glycolysis and trigger intracellular ROS generation...
April 20, 2018: Journal of Proteome Research
Hyungchae Kim, Han Gyeol Park, Min-Jae Maeng, Yu Ri Kang, Kyung Ryoul Park, Junho Choi, Yongsup Park, Young Dong Kim, Changsoon Kim
For organic solar cells (OSCs) based on non-planar phthalocyanines, it has previously been reported that a thin film composed of triclinic crystals with face-on (or flat-lying) oriented molecules, typically obtained with a CuI template layer, is desired for optical absorption in the near infrared (NIR) spectral region. However, this work demonstrates that for a PbPc-C60 donor-acceptor pair, less face-on orientation with a broader orientation distribution obtained with a new template layer consisting of a ZnPc/CuI bilayer is more desirable in terms of solar cell efficiency than the face-on orientation...
April 20, 2018: ACS Applied Materials & Interfaces
Antonio Campos, Sergi Riera-Galindo, Joaquim Puigdollers, Marta Mas-Torrent
Solution-processed n-type organic field-effect transistors (OFETs) are essential elements for developing large-area, low-cost, and all organic logic/complementary circuits. Nonetheless, the development of air-stable n-type organic semiconductors (OSC) lags behind their p-type counterparts. The trapping of electrons at the semiconductor-dielectric interface leads to a lower performance and operational stability. Herein we report printed small molecule n-type OFETs based on a blend with a binder polymer, which enhances the device stability due to the improvement of the semiconductor-dielectric interface quality and a self-encapsulation...
April 19, 2018: ACS Applied Materials & Interfaces
Wei Zhang, Liying Wang, Zhongqiu Xin
Ovarian serous carcinoma (OSC) is semimalignant ovarian tumors that localized in the ovary at the initial presentation, and can be surgically resected in an excellent prognosis. In contrast, surgical treatment plus adjuvant chemotherapy for ovarian malignant epithelial cancer (OMEC) is the standard treatment stratagem that is painful with poor prognosis and cost quite expensively. Thus, the accurate preoperative differentiation of OSC from OMEC is important for determining the treatment methods and decreasing the cost for individual patients...
April 2018: Medicine (Baltimore)
Yasser El Miedany, Maha El Gaafary, Nadia El Aroussy, Sally Youssef
OBJECTIVE: To: 1. implement flipped classroom rheumatology teaching for undergraduate education. 2. Evaluate outcomes of teaching using OSCE assessment and student perceived effectiveness and satisfaction survey. METHODS: The flipped classroom education was conducted in 3 phases. Phase 1: carried out in the students' own time. Web links were emailed to assist exposure of the instructional part of the lesson online. Phase 2: interactive in-class activity to share personal reflection and reinforce the key aspects...
April 16, 2018: Current Rheumatology Reviews
Berhanu G Gebremeskel, Alula M Teklu, Lia T Gebremedhin, Solomon W Beza, Tegbar Yigzaw, Munir K Eshetu, Mengistu H Damtew, Yolanda R Smith
OBJECTIVE: To assess if structured integration of a comprehensive family planning (FP) training into a medical school curriculum improves FP knowledge and skill scores of medical interns. STUDY DESIGN: We compared mean contraception knowledge scores of interns in a medical school with the integrated FP curriculum [intervention school] (n=56) to interns at four conventional medical curriculum schools without structured reinforcement of FP content [control schools] (n=161) in Ethiopia...
April 13, 2018: Contraception
Mark Fox, Damer Blake, Dennis Jacobs
Over the past four decades, there has been an exponential increase in veterinary parasitology knowledge, coinciding with the advent of molecular biology in research. Therefore, it is unrealistic for teachers to expect students to graduate with an encyclopaedic knowledge of the subject. As a result, a new curriculum was introduced at The Royal Veterinary College (University of London) in 2007, designed to meet the needs of our new graduates, i.e. RCVS Day-One Competences. The aims of this curriculum are, inter alia, to ensure that new graduates have an up-to-date body of core knowledge and are able to apply such knowledge and newly-acquired information to scientific and clinical problem-solving...
April 30, 2018: Veterinary Parasitology
Ta-Ko Huang, Chi-Hsun Yang, Yu-Hsin Hsieh, Jen-Chyan Wang, Chun-Cheng Hung
The OSCE is a reliable evaluation method to estimate the preclinical examination of dental students. The most ideal assessment for OSCE is used the augmented reality simulator to evaluate. This literature review investigated a recently developed in virtual reality (VR) and augmented reality (AR) starting of the dental history to the progress of the dental skill. As result of the lacking of technology, it needs to depend on other device increasing the success rate and decreasing the risk of the surgery. The development of tracking unit changed the surgical and educational way...
April 2018: Kaohsiung Journal of Medical Sciences
Lisa K Prince, Ruth C Campbell, Sam W Gao, Jessica Kendrick, Christopher J Lebrun, Dustin J Little, David L Mahoney, Laura A Maursetter, Robert Nee, Mark Saddler, Maura A Watson, Christina M Yuan
Background: Few quantitative nephrology-specific simulations assess fellow competency. We describe the development and initial validation of a formative objective structured clinical examination (OSCE) assessing fellow competence in ordering acute dialysis. Methods: The three test scenarios were acute continuous renal replacement therapy, chronic dialysis initiation in moderate uremia and acute dialysis in end-stage renal disease-associated hyperkalemia. The test committee included five academic nephrologists and four clinically practicing nephrologists outside of academia...
April 2018: Clinical Kidney Journal
Maurilio Gustavo Nespeca, Rafael Rodrigues Hatanaka, Danilo Luiz Flumignan, José Eduardo de Oliveira
Quality assessment of diesel fuel is highly necessary for society, but the costs and time spent are very high while using standard methods. Therefore, this study aimed to develop an analytical method capable of simultaneously determining eight diesel quality parameters (density; flash point; total sulfur content; distillation temperatures at 10% (T10), 50% (T50), and 85% (T85) recovery; cetane index; and biodiesel content) through attenuated total reflection Fourier transform infrared (ATR-FTIR) spectroscopy and the multivariate regression method, partial least square (PLS)...
2018: Journal of Analytical Methods in Chemistry
M E Tabangin, S Josyula, K K Taylor, J C Vasquez, B D Kamath-Rayne
Background: Helping Babies Breathe (HBB), a basic neonatal resuscitation curriculum, improves early neonatal mortality in low-resource settings. Our goal was to determine retention of resuscitation skills by different cadres of providers using the approved HBB Spanish translation in a rural clinic and community hospital in Honduras. Methods: Twelve clinic and 37 hospital providers were trained in 1 d HBB workshops and followed from July 2012 to February 2014. Resuscitation skills were evaluated by objective structured clinical evaluations (OSCEs) at regular intervals...
March 29, 2018: International Health
Liam Abrahams, Laurence D Hurst
Stop codons are frequently selected for beyond their regular termination function for error control. The 'ambush hypothesis' proposes out of frame stop codons (OSCs) terminating frameshifted translations are selected for. Although early indirect evidence was partially supportive, recent evidence suggests OSC frequencies are not exceptional when considering underlying nucleotide content. However, prior null tests fail to control amino acid/codon usages or possible local mutational biases. We therefore return to the issue using bacterial genomes, considering several tests defining and testing against a null...
April 2, 2018: Genome Biology and Evolution
Suman, Anirban Bagui, Ashish Garg, Barkha Tyagi, Vinay Gupta, Surya Prakash Singh
A small molecule non-fullerene electron acceptor (SMNFEA), bearing a furan π-spacer and dicyano-n-hexyl rhodanine as flanking groups, was designed and synthesized for organic solar cell applications. Organic photovoltaic devices based on FRdCN2 and PTB7-Th polymer donors exhibited a highly improved efficient power conversion efficiency of 10.7%, which is the highest so far for OSCs fabricated from fluorene-core-based SMNFEAs.
April 4, 2018: Chemical Communications: Chem Comm
Srijani Mallik, Stefan Mattauch, Manas Kumar Dalai, Thomas Brückel, Subhankar Bedanta
Probing the hybridized magnetic interface between organic semiconductor (OSC) and ferromagnetic (FM) layers has drawn significant attention in recent years because of their potential in spintronic applications. Recent studies demonstrate various aspects of organic spintronics such as magnetoresistance, induced interface moment etc. However, not much work has been performed to investigate the implications of such OSC/FM interfaces on the magnetization reversal and domain structure which are the utmost requirements for any applications...
April 3, 2018: Scientific Reports
Dennisa Davidson, Lois Evans
OBJECTIVES: To explore online study groups as augmentation tools in preparing for the Royal Australian and New Zealand College of Psychiatrists Observed Structured Clinical Examinations (OSCE) for fellowship. METHODS: An online survey of New Zealand trainees was carried out to assess exam preparedness and openness to virtual study groups and results analysed. Relevant material around virtual study groups for fellowship examinations was reviewed and used to inform a pilot virtual study group...
March 1, 2018: Australasian Psychiatry: Bulletin of Royal Australian and New Zealand College of Psychiatrists
P R Archana, V Sejian, Wilfred Ruban, M Bagath, G Krishnan, J Aleena, G B Manjunathareddy, V Beena, Raghavendra Bhatta
The primary objective of the study was to compare the impact of heat stress on meat production characteristics of Osmanabadi and Salem Black breed goats based on changes in carcass characteristics, meat quality attributes, plasma leptin concentration, skeletal muscle myostatin and heat shock protein 70 (HSP70) gene expression patterns. The goats were randomly distributed into four groups: OSC (n = 6; Osmanabadi Control), OSHS (n = 6; Osmanabadi Heat Stress), SBC (n = 6; Salem Black Control) and SBHS (n = 6; Salem Black Heat Stress)...
March 24, 2018: Meat Science
Sihui Hou, Xinming Zhuang, Zuchong Yang, Junsheng Yu
Nitrogen dioxide (NO₂) sensors based on organic thin-film transistors (OTFTs) were fabricated by conventional annealing (horizontal) and vertical annealing processes of organic semiconductor (OSC) films. The NO₂ responsivity of OTFTs to 15 ppm of NO₂ is 1408% under conditions of vertical annealing and only 72% when conventional annealing is applied. Moreover, gas sensors obtained by vertical annealing achieve a high sensing performance of 589% already at 1 ppm of NO₂, while showing a preferential response to NO₂ compared with SO₂, NH₃, CO, and H₂S...
March 29, 2018: Nanomaterials
Deepa Bhartiya
A debate is ongoing about the 'stem cell' status of mesenchymal stem cells (MSCs). This can easily be resolved based on the definition of a stem cell. 'True' stem cells are expected to undergo asymmetric cell divisions (ACD) whereby they divide to self-renew and give rise to a slightly bigger, differentiated cell. However, MSCs like any other adult tissue-specific stem cells, including hematopoietic (HSCs), spermatogonial (SSCs) and ovarian (OSCs) stem cells, do not undergo ACD; rather they undergo rapid symmetrical cell divisions...
March 27, 2018: Stem Cell Research & Therapy
Pablo Vidal-García, María Elena Sánchez-Vergara, Ricardo Corona-Sánchez, Omar Jiménez-Sandoval, Efraín Gutiérrez-Rivas Mercado, Rubén A Toscano, Cecilio Álvarez-Toledano
A new series of Fischer carbenes have been synthetized and examined as hole-transporting or electron-transporting layers (HTLs or ETLs) in the fabrication of organic solar cells (OSCs). The synthesis of three Fischer aminocarbene complexes with the general formula [Cr(CO)₅{C(NHCH₂)Ar}] (Ar = 2-pyridyl ( 3a ), 3-pyridyl ( 3b ) and 4-pyridyl ( 3c )) is reported. The molecular structure of complex 3b has been confirmed by X-ray analysis. In order to study the possible applications of the three Fischer aminocarbenes in OSCs, thin films of these complexes were prepared using a vacuum deposition process...
March 24, 2018: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
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