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https://www.readbyqxmd.com/read/28733664/charge-injection-carriers-recombination-and-homo-energy-level-relationship-in-perovskite-solar-cells
#1
Jesús Jiménez-López, Werther Cambarau, Lydia Cabau, Emilio Palomares
We present a comparative study between a series of well-known semiconductor polymers, used in efficient organic solar cells as hole transport materials (HTM), and the state-of-the art material used as hole transport material in perovskite solar cells: the spiro-OMeTAD. The observed differences in solar cell efficiencies are studied in depth using advanced photoinduced spectroscopic techniques under working illumination conditions. We have observed that there is no correlation between the highest occupied molecular orbital (HOMO) energy levels of the organic semiconductors and the measured open-circuit voltage (VOC)...
July 21, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28727425/the-database-and-bioinformatics-studies-of-probiotics
#2
Lin Tao, Bohua Wang, Yafen Zhong, Siok Hoon Pow, Xian Zeng, Chu Qin, Peng Zhang, Shangying Chen, Weidong He, Ying Tan, Hongxia Liu, Yuyang Jiang, Weiping Chen, Yu Zong Chen
Probiotics have been widely explored for health benefits, animal cares, and agricultural applications. Recent advances in microbiome, microbiota and microbial dark matter research have fueled greater interests in and paved ways for the study of the mechanisms of probiotics and the discovery of new probiotics from uncharacterized microbial sources. A probiotics database named PROBIO was developed to facilitate these efforts and the need for the information of the known probiotics, which provides the comprehensive information about the probiotic functions of 448 marketed, 167 clinical trial/field trial and 382 research probiotics for use or being studied for use in humans, animals, and plants...
July 20, 2017: Journal of Agricultural and Food Chemistry
https://www.readbyqxmd.com/read/28696442/reducing-hole-transporter-use-and-increasing-perovskite-solar-cell-stability-with-dual-role-polystyrene-microgel-particles
#3
Mu Chen, Muhamad Z Mokhtar, Eric Whittaker, Qing Lian, Bruce Hamilton, Paul O'Brien, Mingning Zhu, Zhengxing Cui, Saif A Haque, Brian R Saunders
Perovskite solar cells (PSCs) are a disruptive technology that continues to attract considerable attention due to their remarkable and sustained power conversion efficiency increase. Improving PSC stability and reducing expensive hole transport material (HTM) usage are two aspects that are gaining increased attention. In a new approach, we investigate the ability of insulating polystyrene microgel particles (MGs) to increase PSC stability and replace the majority of the HTM phase. MGs are sub-micrometre crosslinked polymer particles that swell in a good solvent...
July 20, 2017: Nanoscale
https://www.readbyqxmd.com/read/28687341/carbenoxolone-prevents-chemical-eye-ischemia-reperfusion-induced-cell-death-via-11%C3%AE-hydroxysteroid-dehydrogenase-type-1-inhibition
#4
Kyoung-Jin Choi, Yoon-Ju Na, Sung Bum Park, Won Hoon Jung, Hye-Rim Sung, Ki Young Kim
Glaucoma is one of the leading causes of preventable blindness diseases, affecting more than 2 million people in the United States. Recently, 11β-hydroxysteroid dehydrogenase type 1 (11β-HSD1) inhibitors were found to exert preventive effects against glaucoma. Therefore, we investigated whether carbenoxolone (CBX), an 11β-HSD1 inhibitor, prevents chemical ischemia-reperfusion-induced cell death in human trabecular meshwork (HTM) cells. The present study demonstrated that CBX inhibited cell death caused by iodoacetic acid (IAA)-induced ischemia-reperfusion, and its effect was associated with the inhibition of 11β-HSD1 expression and activity...
July 4, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
https://www.readbyqxmd.com/read/28684643/clarithromycin-plus-intravenous-immunoglobulin-therapy-can-reduce-the-relapse-rate-of-kawasaki-disease-a-phase-2-open-label-randomized-control-study
#5
Etsuro Nanishi, Hisanori Nishio, Hidetoshi Takada, Kenichiro Yamamura, Mitsuharu Fukazawa, Kenji Furuno, Yumi Mizuno, Kenjiro Saigo, Ryo Kadoya, Noriko Ohbuchi, Yasuhiro Onoe, Hironori Yamashita, Hideki Nakayama, Takuya Hara, Takuro Ohno, Yasuhiko Takahashi, Ken Hatae, Tatsuo Harada, Takayuki Shimose, Junji Kishimoto, Shouichi Ohga, Toshiro Hara
BACKGROUND: We previously reported that biofilms and innate immunity contribute to the pathogenesis of Kawasaki disease. Therefore, we aimed to assess the efficacy of clarithromycin, an antibiofilm agent, in patients with Kawasaki disease. METHODS AND RESULTS: We conducted an open-label, multicenter, randomized, phase 2 trial at 8 hospitals in Japan. Eligible patients included children aged between 4 months and 5 years who were enrolled between days 4 and 8 of illness...
July 6, 2017: Journal of the American Heart Association
https://www.readbyqxmd.com/read/28673001/role-of-nuclear-factor-erythroid-derived-2-like-2-in-the-age-resistant-properties-of-the-glaucoma-trabecular-meshwork
#6
Jintao Cheng, Jiamei Liang, Jinze Qi
Glaucoma is a major cause of irreversible blindness. Nuclear factor (erythroid-derived 2)-like 2 (Nrf2) regulates the expression of numerous antioxidants within cells and is therefore a focus of current ophthalmic research. To determine the roles of Nrf2 in mediating the glaucoma trabecular meshwork (GTM), the present study evaluated the levels of Nrf2 expression in GTM and human trabecular meshwork (HTM) cells by reverse-transcription-quantitative polymerase chain reaction and western blot analysis. It was principally observed that Nrf2 expression was downregulated in GTM cells...
July 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28671835/rational-design-of-molecular-hole-transporting-materials-for-perovskite-solar-cells-direct-versus-inverted-device-configurations
#7
Roberto Grisorio, Rosabianca Iacobellis, Andrea Listorti, Luisa De Marco, Maria Pia Cipolla, Michele Manca, Aurora Rizzo, Antonio Abate, Giuseppe Gigli, Gian Paolo Suranna
Due to a still limited understanding of the reasons making 2,2',7,7'-tetrakis(N,N-di-p-methoxyphenylamine)-9,9'-spirobifluorene (Spiro-OMeTAD) the state-of-the-art hole-transporting material (HTM) for emerging photovoltaic applications, the molecular tailoring of organic components for perovskite solar cells (PSC) lacks in solid design criteria. Charge delocalization in radical cationic states can undoubtedly be considered as one of the essential prerequisites for a HTM, but this aspect has been investigated to a relatively minor extent...
July 3, 2017: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/28664952/quantifying-ultrafast-charge-carrier-injection-from-methylammonium-lead-iodide-into-the-hole-transport-material-h101-and-mesoporous-tio2-using-vis-nir-transient-absorption
#8
Johannes R Klein, Mirko Scholz, Kawon Oum, Thomas Lenzer
Organic-inorganic hybrid lead halide perovskites already reach very high power conversion efficiencies above 22% on architectures employing mesoporous TiO2, but the carrier injection processes across the different interfaces are still not fully understood. Here we use ultrafast broadband transient absorption spectroscopy to determine time constants and yields for hole and electron injection. We show that hole transfer from the perovskite valence band (VB) to the hole-transport material (HTM) H101 at the perovskite/HTM interface occurs in less than 500 fs, but is limited by imperfections of the contact layer and poor infiltration of the HTM into the mesoporous structure...
July 21, 2017: Physical Chemistry Chemical Physics: PCCP
https://www.readbyqxmd.com/read/28653432/low-cost-carbazole-based-hole-transport-material-for-highly-efficient-perovskite-solar-cells
#9
Zhiliang Chen, Hui Li, Xiaolu Zheng, Qi Zhang, Zhanfeng Li, Yuying Hao, Guojia Fang
A low cost carbazole based small molecule material 1,3,6,8-tetra(N,N-p-dimethoxyphenylamino)-9-ethyl-carbazole was designed and synthesized using a facile three-step synthetic route. The novel material was fully characterized and further applied as hole transport material (HTM) for low temperature processed planar perovskite solar cells (PSCs). Devices based on this new HTM exhibit a high power conversion efficiency (PCE) of 17.8%, which is comparable to that (PCE of 18.6%) of the costly 2,2',7,7'-Tetrakis[N,N-di(4-methoxyphenyl)amino]-9,9'-spirobifluorene (Spiro-OMeTAD) based PSCs...
June 26, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28650097/low-cost-perovskite-solar-cells-employing-dimethoxydiphenylamine-substituted-bistricyclic-aromatic-enes-as-hole-transporting-materials
#10
Mohammad Khaja Nazeeruddin, Kasparas Rakstys, Sanghyun Paek, Giulia Grancini, Peng Gao, Vygintas Jankauskas, Abdullah M Asiri
The synthesis, characterization and photovoltaic performance of series of novel molecular hole transporting materials (HTMs) based on bistricyclic aromatic enes (BAEs) are presented. The new derivatives have been obtained following the simple and straightforward two-step procedure from inexpensive starting reagents mimicking the synthetically challenging 9,9'-spirobifluorene moiety of the well-studied spiro-OMeTAD. The novel HTMs are tested in mixed caions and anions perovskite solar cells (PSCs) yielding power conversion efficiency (PCE) of 19...
June 26, 2017: ChemSusChem
https://www.readbyqxmd.com/read/28636771/is-transvaginal-contained-tissue-extraction-for-everyone
#11
Charles Miller
Professor Ghezzi, et al. should be congratulated for their excellent manuscript "Transvaginal Contained Tissue Extraction After Laparoscopic Myomectomy: A Cohort Study". This is a well-conceived, well-written retrospective cohort study describing operative and peri-operative outcomes for patients who have undergone transvaginal morcellation via a posterior colpotomy. Given the continued controversy regarding electronic power morcellation leading to restriction of use in certain areas, this study is not only impactful, in that it describes an alternative technique with data accumulated over a decade of experience, but it describes a technique of contained morcellation that is neither based on the controversial power morcellation, nor the mini-laparotomy (https://www...
June 21, 2017: BJOG: An International Journal of Obstetrics and Gynaecology
https://www.readbyqxmd.com/read/28625600/where-to-do-water-testing-for-pseudomonas-aeruginosa-in-a-healthcare-setting
#12
Mark I Garvey, Craig W Bradley, Elisabeth Holden, Mike Weibren
Pseudomonas aeruginosa is an important nosocomial pathogen commonly colonising hospital water supplies. HTM 04-01 addresses the risk posed by recommending water testing in augmented care areas which includes outpatient haemodialysis. We discuss how two teaching hospitals independently reviewed the risk to outpatient haemodialysis patients drawing the same conclusion. The highest number of infection episodes with P. aeruginosa was seen in critical care followed by burns and haematology with the lowest in haemodialysis...
June 15, 2017: Journal of Hospital Infection
https://www.readbyqxmd.com/read/28609185/discovery-and-preclinical-development-of-netarsudil-a-novel-ocular-hypotensive-agent-for-the-treatment-of-glaucoma
#13
Cheng-Wen Lin, Bryan Sherman, Lori A Moore, Carmen L Laethem, Da-Wen Lu, Padmanabhan P Pattabiraman, Ponugoti Vasantha Rao, Mitchell A deLong, Casey C Kopczynski
PURPOSE: Rho-associated protein kinase (ROCK) inhibitors lower intraocular pressure (IOP) by increasing aqueous outflow through the trabecular meshwork (TM). The preclinical characterization of netarsudil, a new ROCK/norepinephrine transporter (NET) inhibitor currently in clinical development, is presented herein. METHODS: The kinase inhibitory activity of netarsudil was compared to its esterase metabolite, netarsudil-M1, and 3 other ROCK inhibitors using a commercially available kinase assay kit...
June 13, 2017: Journal of Ocular Pharmacology and Therapeutics
https://www.readbyqxmd.com/read/28593330/core-curriculum-illustration-pediatric-viral-parotitis
#14
Barbara Pawley, Sibi Rajendran, Ramya Kondaveeti
This is the 36th installment of a series that will highlight one case per publication issue from the bank of cases available online as part of the American Society of Emergency Radiology (ASER) educational resources. Our goal is to generate more interest in and use of our online materials. To view more cases online, please visit the ASER Core Curriculum and Recommendations for Study online at http://www.aseronline.org/curriculum/toc.htm .
June 7, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28586796/functional-activity-of-matrix-metalloproteinases-2-and-9-in-tears-of-patients-with-glaucoma
#15
Prity Sahay, Aparna Rao, Debananda Padhy, Sarada Sarangi, Gopinath Das, Mamatha M Reddy, Rahul Modak
Purpose: To evaluate the differential expression of tear matrix metalloproteinases (MMP) 2 and 9 in of patients with various forms of glaucoma. Methods: Tear samples were collected with a Schirmer's strip from 148 eyes of 113 patients (medically naïve patients with primary open-angle [POAG] or angle closure glaucoma [PACG] and those with pseudoexfoliation syndrome [PXF] or glaucoma [PXG]). These were compared to patients undergoing cataract surgery (controls) for this cross-sectional study...
May 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28577249/progeny-production-in-the-periplasm-of-thermosipho-globiformans
#16
Tomohiko Kuwabara, Kensuke Igarashi
Thermotogales are rod-shaped, Gram-negative, anaerobic, (hyper) thermophiles distinguished by an outer sheath-like toga, which comprises an outer membrane (OM) and an amorphous layer (AL). Thermosipho globiformans bacteria can transform into spheroids with multiple cells concurrently with AL disintegration during early growth; the cell is defined as the cytoplasmic membrane (CM) plus the entity surrounded by the CM. Spheroids eventually produce rapidly moving periplasmic 'progenies' through an unknown mechanism...
July 2017: Extremophiles: Life Under Extreme Conditions
https://www.readbyqxmd.com/read/28567585/core-curriculum-illustration-ventriculitis-as-a-complication-of-ventriculoperitoneal-shunt-induced-rectal-perforation
#17
Barbara Pawley, Sibi Rajendran
This is the 35th installment of a series that will highlight one case per publication issue from the bank of cases available online as part of the American Society of Emergency Radiology (ASER) educational resources. Our goal is to generate more interest in and use of our online materials. To view more cases online, please visit the ASER Core Curriculum and Recommendations for Study online at: http://www.aseronline.org/curriculum/toc.htm .
May 31, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28550495/core-curriculum-illustration-acute-traumatic-aortic-injury
#18
Manuel Trevino, Shaked Laks, Noemi Brunner
This is the 34th installment of a series that will highlight one case per publication issue from the bank of cases available online as part of the American Society of Emergency Radiology (ASER) educational resources. Our goal is to generate more interest in and use of our online materials. To view more cases online, please visit the ASER Core Curriculum and Recommendations for Study online at http://www.aseronline.org/curriculum/toc.htm .
May 26, 2017: Emergency Radiology
https://www.readbyqxmd.com/read/28546802/immunohistochemical-evaluation-of-oestrogen-receptors-%C3%AE-and-%C3%AE-in-epithelium-of-the-vaginal-mucous-membrane-in-women-after-oestrogen-therapy
#19
Beata Sawczuk, Maria Gołębiewska, Andrzej Mazurek, Lech Chyczewski
Oestrogens act on target cells through α and β receptors (ERα and ERβ). Expression of oestrogen receptors is associated with the age and menopausal condition of women. The aim of the study was an immunohistochemical evaluation of ERα and ERβ receptors in epithelium of the vaginal mucous membrane of women subjected to different forms of hormonal therapy (HTM). Oestrogen receptors ERα and ERβ were identified using immunohistochemical methods and evaluated in smears of vaginal mucous membranes collected from 60 patients subjected to HTM (including 20 patients after oral therapy, 20 patients after transdermal therapy, and 20 patients after vaginal therapy)...
March 2017: Przeglad Menopauzalny, Menopause Review
https://www.readbyqxmd.com/read/28540970/nanostructural-and-photo-electrochemical-properties-of-solution-spin-coated-cu2znsns4-tio2-nanorod-forest-films-with-an-improved-photovoltaic-performance
#20
Zhuoran Wang, Raynald Gauvin, George P Demopoulos
Cu2ZnSnS4 (CZTS), other than in standard p-n junction device architecture, can be employed as a broad light absorber upon coating onto a wide bandgap electron conducting TiO2 film. Earlier CZTS sensitized TiO2 films have yielded low photoconversion efficiency and Voc. In this work, a water-ethanol solution spin coating approach has been applied to directly deposit CZTS nanocrystallites on rutile TiO2 nanorods grown on an FTO substrate (TNR) for evaluation in a sensitized solar cell configuration. The FTO@TNR@CZTS photoanode following controlled annealing is shown to exhibit improved photovoltaic properties...
June 8, 2017: Nanoscale
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