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Xingjuan Zhao, Xiaoli Yu, Yong-Ill Lee, Hong-Guo Liu
Composite thin films with well-defined and parallel nanowires were fabricated from the binary blends of a diblock copolymer polystyrene-block-poly(2-vinylpyridine) (PS-b-P2VP) and several homo-polystyrenes (h-PSs) at the air/liquid interface through a facile technique, which involves solution self-assembly, interface adsorption, and further self-organization processes. It was confirmed that the nanowires that appeared at the air/water interface came from the cylindrical micelles formed in solution. Interestingly, the diameters of the nanowires are uniform and can be tuned precisely from 45 to 247 nm by incorporating the h-PS molecules into the micellar core...
October 26, 2016: Langmuir: the ACS Journal of Surfaces and Colloids
Woongsik Jang, Sunyong Ahn, Soyun Park, Jong Hyeok Park, Dong Hwan Wang
The importance of conductive polymer electrodes with a balance between the morphology and electrical conductivity for flexible organic photovoltaic properties has been demonstrated. Highly transparent PEDOT:PSS anodes with controlled conductivity and surface properties were realized by insertion of dimethyl sulfoxide (DMSO) and a fluorosurfactant (Zonyl) as efficient additives and used for flexible organic photovoltaic cells (OPVs) which are based on a bulk-heterojunction of polythieno[3,4-b]-thiophene-co-benzodithiophene (PTB7):[6,6]phenyl-C71-butyric acid methyl ester (PC71BM)...
October 26, 2016: Nanoscale
Julia König, Sabine Schmid, Eva Löser, Olaf Neumann, Stefan Buchholz, Ralph Kästner
BACKGROUND: There has been increasing research on posttraumatic stress disorder (PTSD) following childbirth in the last two decades. The literature on predictors of who develops posttraumatic stress symptoms (PSS) suggests that both vulnerability and birth factors have an influence, but many studies measure predictors and outcomes simultaneously. OBJECTIVE: In this context, we aimed to examine indirect and direct effects of predictors of PSS, which were measured longitudinally...
2016: European Journal of Psychotraumatology
Guofeng Xu, Shuangjiang Luo, Qingbo Yang, Jingfa Yang, Jiang Zhao
The molecular conformation of two typical polyelectrolytes, sodium polystyrene sulfonate (NaPSS) and quarternized poly-4-vinylpyridine (QP4VP), was studied in aqueous solutions without salt addition at the single molecular level. By fluorescence correlation spectroscopy, the hydrodynamic radius (Rh) of NaPSS and QP4VP with the molecular weight ranging more than one order of magnitude was measured. The scaling analysis of Rh exhibits scaling exponent of 0.70 and 0.86 for NaPSS and QP4VP in solutions without added salts, respectively, showing the conformation is much more expanded than random coil...
October 14, 2016: Journal of Chemical Physics
Emna Farhat, Mourad Zouari, Ines Ben Abdelaziz, Cyrine Drissi, Rahma Beyrouti, Mohamed Ben Hammouda, Fayçal Hentati
BACKGROUND: Cerebellar ataxia represents a rare and severe complication of Sjӧgren syndrome (SS), especially with a progressive onset and cerebellar atrophy on imaging. CASE PRESENTATION: We report the case of a 30-year-old woman, with a past history of dry eyes and mouth, who presented a severe cerebellar ataxia worsening over 4 years associated with tremor of the limbs and the head. Brain MRI showed bilateral hyperintensities on T2 and FLAIR sequences, affecting periventricular white matter, with marked cerebellar atrophy...
2016: Cerebellum & Ataxias
Corry Gellatly, Marion Petrie
BACKGROUND: The Indian sex ratio has become highly male-biased in recent decades. This may be attributed to prenatal sex selection (PSS) and excess female infant mortality. However, the question of whether these factors are related has not been adequately studied. Here we examine whether increased use of PSS may offset excess female infant mortality, by reducing the number of 'unwanted' daughters being born. METHODS: We analyse the National Family Health Survey (NHFS) data sets for India, which contain nationally representative samples of birth histories for women aged 15-49, interviewed in 1992-1993, 1998-1999 and 2005-2006...
October 24, 2016: Journal of Epidemiology and Community Health
Ecaterina Stela Dragan, Judith Mayr, Marleen Häring, Ana Irina Cocarta, David Diaz Diaz
The aggregation mode of three azo dyes, methyl orange (MO), ponceau SS (PSS) and direct blue 1 (DB1) induced by three 1,4-diazabicyclo[2.2.2]octane (DABCO)-based ionene polymers having different topologies (i.e. 1,2-ionene, 1,3-ionene and 1,4-ionene) was investigated in this work. Metachromatic behavior of the dyes in the presence of ionenes, and the stability of the ionene/dye complex were discussed as a function of ionene structure. It was demonstrated that the association of the dye molecules with the ionenes and the metachromasy were strongly influenced by both the dye structure and the ionene topology...
October 24, 2016: ACS Applied Materials & Interfaces
Jiyuan Zheng, Lai Wang, Di Yang, Jiadong Yu, Xiao Meng, Zhibiao Hao, Changzheng Sun, Bing Xiong, Yi Luo, Yanjun Han, Jian Wang, Hongtao Li, Mo Li, Qian Li
In ultra-high sensitive APDs, a vibrate of temperature might bring a fatal decline of the multiplication performance. Conventional method to realize a temperature-stable APD focuses on the optimization of device structure, which has limited effects. While in this paper, a solution by reducing the carrier scattering rate based on an GaN/AlN periodically-stacked structure (PSS) APD is brought out to improve temperature stability essentially. Transport property is systematically investigated. Compared with conventional GaN homojunction (HJ) APDs, electron suffers much less phonon scatterings before it achieves ionization threshold energy and more electrons occupy high energy states in PSS APD...
October 24, 2016: Scientific Reports
Huma Siddiqui, Tsute Chen, Ardita Aliko, Piotr M Mydel, Roland Jonsson, Ingar Olsen
BACKGROUND: Reduced salivation is considered a major clinical feature of most but not all cases of primary Sjögren's syndrome (pSS). Reduced saliva flow may lead to changes in the salivary microbiota. These changes have mainly been studied with culture that typically recovers only 65% of the bacteria present. OBJECTIVE: This study was to use high throughput sequencing, covering both cultivated and not-yet-cultivated bacteria, to assess the bacterial microbiota of whole saliva in pSS patients with normal salivation...
2016: Journal of Oral Microbiology
Milene N O Moritz, Joyce L S Gonçalves, Irwin A P Linares, Janice R Perussi, Kleber T de Oliveira
An amphiphilic chlorin derivative (CHL-T) was prepared from methylpheophorbide a (CHL) and 2-Amino-2-(hydroxymethyl)-1,3-propanediol (TRISMA(®)). The new chlorin was compared to other dyes (CHL and Hypericin) in relation to photophysical and photobiological activities in tumor and non-tumor cell lines. Cytotoxicity and cell death target were determined to evaluate the CHL-T efficiency, comparing to the precursor CHL and to the well-known dye hypericin (HY). All of the studied compounds exhibited absorption bands in the therapeutic window and presented a small fluorescence quantum yield compared to the reference dye (rhodamine B)...
October 18, 2016: Photodiagnosis and Photodynamic Therapy
A S M Iftekhar Uddin, Usman Yaqoob, Gwiy-Sang Chung
Herein we report an enhanced triboelectric nanogenerator (TENG) based on the contact-separation mode between a patterned film of polydimethylsiloxane (PDMS) with a semi-metallic elastomer of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) and a nylon fiber film. The addition of ethylene glycol to the PEDOT:PSS film improves the functionality of the TENG significantly, yielding promising applicability in both indoor and outdoor (i.e., under sunlight) environments, with the maximum instantaneous power of 0...
October 21, 2016: ACS Applied Materials & Interfaces
Eui Jin Lee, Jae Pil Han, Seung Eun Jung, Min Hee Choi, Doo Kyung Moon
In this study, we fabricated conventional structured organic solar cells (OSCs) by introducing a hole extraction layer (HEL) that consisted of poly(3,4-ethylenedioxythiophene):polystyrenesulfonate (PEDOT:PSS) and conjugated polymer electrolyte (CPE) poly[9,9-bis(4'-sulfonatobutyl)fluorene-alt-thiophene] (PFT-D). PFT-D has a -SO3(-) functional group that acts as a conjugate base against the -SO3H of PSS. In addition, the molecular dipole of PFT-D can screen the coulombic attraction between PEDOT chains and PSS chains...
October 21, 2016: ACS Applied Materials & Interfaces
Ahmet Özen, Perran Boran, Fatih Torlak, Elif Karakoç-Aydıner, Safa Barış, Melda Karavuş, Işıl Barlan
BACKGROUND: Allergic diseases with a potential for anaphylaxis pose a critical public health issue in schools. AIMS: This study was carried out to identify the current status of prevention and management of anaphylaxis in school children with the main goal of establishing such an action plan. STUDY DESIGN: Cross-sectional study. METHODS: Schools were randomly selected from 11 different regions of Istanbul. A questionnaire was filled out by 2596 teachers/school principals from 232 public schools...
September 2016: Balkan Medical Journal
Minan Y Al-Ezzi, Neha Pathak, Anwar R Tappuni, Khalid S Khan
OBJECTIVES: The aim of this study is to assess the impact of dryness caused by primary Sjögren's Syndrome (pSS) on smell, taste and sexual function in female patients, and its influence on quality of life. METHODS: Electronic databases including MEDLINE via Ovid, Web of Science, SCOUPUS, EMBASE and COCHRANE LIBRARY were searched until April 2016. Studies that assessed the function of smell, taste and sexuality in pSS patients, defined by the American European Consensus Group (AECG) criteria...
October 20, 2016: Modern Rheumatology
Geraint P Williams, Peter Nightingale, Sue Southworth, Alastair K O Denniston, Paul J Tomlins, Stephen Turner, John Hamburger, Simon J Bowman, S John Curnow, Saaeha Rauz
Purpose: Ocular mucous membrane pemphigoid (OcMMP) is a rare autoimmune disorder resulting in progressive conjunctival fibrosis and ocular surface failure leading to sight loss in up to 50%. This study was designed to optimize an ocular surface sampling technique for identification of novel biomarkers associated with disease activity and/or progressive fibrosis. Methods: Fifty-seven patients with OcMMP underwent detailed examination of conjunctival inflammation and fibrosis using fornix depth measurement...
October 1, 2016: Investigative Ophthalmology & Visual Science
Peng Wang, Suling Zhao, Zheng Xu, Bo Qiao, Zhijuan Long, Qingyu Huang
High efficiency, solution-processed, organic light emitting devices (OLEDs), using a thermally-activated delayed fluorescent (TADF) emitter, 1,2,3,5-tetrakis(carbazol-9-yl)-4,6-dicyanobenzene (4CzIPN), are fabricated, and the transient electroluminescence (EL) decay of the device with a structure of [ITO/PEDOT: PSS/4CzIPN 5 wt % doped 4,40-N,N0-dicarbazolylbiphenyl(CBP)/bis-4,6-(3,5-di-4-pyridylphenyl)-2-methylpyrimidine (B4PyMPM)/lithium fluoride (LiF)/Al], is systematically studied. The results shed light on the dominant operating mechanism in TADF-based OLEDs...
October 14, 2016: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
Veronika Huntosova, Katarina Stroffekova
Photosensitizers (PSs) in photodynamic therapy (PDT) are, in most cases, administered systemically with preferential accumulation in malignant tissues; however, exposure of non-malignant tissues to PS may also be clinically relevant, when PS molecules affect the pro-apoptotic cascade without illumination. Hypericin (Hyp) as PS and its derivatives have long been studied, regarding their photodynamic and photocytotoxic characteristics. Hyp and its derivatives have displayed light-activated antiproliferative and cytotoxic effects in many tumor cell lines without cytotoxicity in the dark...
October 14, 2016: Cancers
Tiina Vuorinen, Juha Niittynen, Timo Kankkunen, Thomas M Kraft, Matti Mäntysalo
Epidermal electronic systems (EESs) are skin-like electronic systems, which can be used to measure several physiological parameters from the skin. This paper presents materials and a simple, straightforward fabrication process for skin-conformable inkjet-printed temperature sensors. Epidermal temperature sensors are already presented in some studies, but they are mainly fabricated using traditional photolithography processes. These traditional fabrication routes have several processing steps and they create a substantial amount of material waste...
October 18, 2016: Scientific Reports
Gabriela M Balarini, Eliana Zandonade, Leandro Tanure, Gilda A Ferreira, Wildner M Sardenberg, Érica V Serrano, Cleia C Dias, Túlio P Navarro, Hilde H Nordal, Piotr M Mydel, Johan G Brun, Karl A Brokstad, Eva Gerdts, Roland Jonsson, Valéria Valim
OBJECTIVES: We aimed to identify the association of carotid atherosclerosis with the traditional risk factors, disease features, cytokine profile, and calprotectin in patients with primary Sjögren's syndrome (pSS). METHODS: 63 primary pSS patients and 63 age- and sex-matched healthy controls underwent carotid ultrasound, clinical and laboratory examination. The presence of carotid plaques was taken as carotid atherosclerosis. The covariates of carotid atherosclerosis were identified in univariate and multivariate regressions...
September 8, 2016: Clinical and Experimental Rheumatology
Charles Nicaise, Laura Weischelbaum, Liliane Schandene, Valérie Gangji, Florence Dehavay, Joanna Bouchat, Benoît Balau, Thomas Vogl, Muhammad S Soyfoo
OBJECTIVES: To determine the role of S100A8/A9 in the pathogenesis of primary Sjögren's syndrome (pSS). METHODS: The serum levels of S100A8/A9 were determined in pSS patients and healthy controls by ELISA. The expression of S100A8/A9 in salivary glands was assessed by immunohistochemistry. The phenotype of S100A8+ and S100A9+ cells was identified using double immunofluorescence. The effects of S100A8/A9 on cytokine production by peripheral blood mononuclear cells (PBMCs) from pSS patients were determined in vitro by flow cytometry...
October 7, 2016: Clinical and Experimental Rheumatology
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