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https://www.readbyqxmd.com/read/29786887/perovskite-solar-cells-with-inorganic-electron-and-hole-transport-layers-exhibiting-long-term-%C3%A2-500-h-stability-at-85-%C3%A2-c-under-continuous-1-sun-illumination-in-ambient-air
#1
Seongrok Seo, Seonghwa Jeong, Changdeuck Bae, Nam-Gyu Park, Hyunjung Shin
Despite the high power conversion efficiency (PCE) of perovskite solar cells (PSCs), poor long-term stability is one of the main obstacles preventing their commercialization. Several approaches to enhance the stability of PSCs have been proposed. However, an accelerating stability test of PSCs at high temperature under the operating conditions in ambient air remains still to be demonstrated. Herein, interface-engineered stable PSCs with inorganic charge-transport layers are shown. The highly conductive Al-doped ZnO films act as efficient electron-transporting layers as well as dense passivation layers...
May 22, 2018: Advanced Materials
https://www.readbyqxmd.com/read/29786850/plasticizers-and-bpa-residues-in-tunisian-and-italian-culinary-herbs-and-spices
#2
Giuseppa Di Bella, Hedi Ben Mansour, Asma Ben Tekaya, Asma Beltifa, Angela Giorgia Potortì, Emanuele Saiya, Giovanni Bartolomeo, Giacomo Dugo, Vincenzo Lo Turco
In the present study, 18 plasticizers and residues in 10 different Tunisian and Italian culinary herbs and spices (black pepper, mint, caraway, coriander, oregano, rosemary, thyme, fennel, verbena, and laurel) were determined by GC/MS. Di-methylphthalate, di-(2-methylpropyl)adipate, di-n-butyladipate, di-propylphthalate, benzylbenzoate, di-phenylphthalate, and bisphenol A were lower than their LOQ in all 118 samples. Among the Tunisian samples, di-(2-ethylhexyl)phthalate was found in all types of samples and di-butylphthalate in 50% of types; all other phthalates were rarely dectected...
May 22, 2018: Journal of Food Science
https://www.readbyqxmd.com/read/29786775/stormram-4-an-mr-safe-robotic-system-for-breast-biopsy
#3
Vincent Groenhuis, Françoise J Siepel, Jeroen Veltman, Jordy K van Zandwijk, Stefano Stramigioli
Suspicious lesions in the breast that are only visible on magnetic resonance imaging (MRI) need to be biopsied under MR guidance with high accuracy and efficiency for accurate diagnosis. The aim of this study is to present a novel robotic system, the Stormram 4, and to perform preclinical tests in an MRI environment. Excluding racks and needle, its dimensions are 72 × 51 × 40 mm. The Stormram 4 is driven by two linear and two curved pneumatic stepper motors. The linear motor is capable of exerting 63 N of force at a pressure of 0...
May 21, 2018: Annals of Biomedical Engineering
https://www.readbyqxmd.com/read/29786698/a-reconstruction-of-global-hydroclimate-and-dynamical-variables-over-the-common-era
#4
Nathan J Steiger, Jason E Smerdon, Edward R Cook, Benjamin I Cook
Hydroclimate extremes critically affect human and natural systems, but there remain many unanswered questions about their causes and how to interpret their dynamics in the past and in climate change projections. These uncertainties are due, in part, to the lack of long-term, spatially resolved hydroclimate reconstructions and information on the underlying physical drivers for many regions. Here we present the first global reconstructions of hydroclimate and associated climate dynamical variables over the past two thousand years...
May 22, 2018: Scientific Data
https://www.readbyqxmd.com/read/29786584/effect-of-atmospheric-technogenic-emissions-on-health-indicators-of-child-population
#5
Olha M Toronchenko, Viktor I Bredun, Natalia O Smoliar
OBJECTIVE: Introduction:The identification of scientifically grounded dependency of the atmospheric pollution effect on the health level of the child population within particular area makes it possible to assess the degree of district environmental safety and provides the possibility for implementation of targeted programs and risk preventing strategies associated with atmospheric emissions. The aim of the study is to assess the dependence of child morbidity rate development caused by atmospheric chemical pollution, which resulted from the stationary and mobile sources activity in terms of the Poltava region (Ukraine) as a model...
2018: Wiadomości Lekarskie: Organ Polskiego Towarzystwa Lekarskiego
https://www.readbyqxmd.com/read/29786437/cobalt-catalyzed-oxidative-c-sp3-h-phosphonylation-for-%C3%AE-aminophosphonates-via-c-sp3-h-p-o-h-coupling
#6
Binzhou Lin, Shanshan Shi, Rongcan Lin, Yiqun Cui, Meijuan Fang, Guo Tang, YuFen Zhao
The first oxidative C(sp3)-H phosphonylation of tertiary aliphatic amines has been developed. The use of cobalt acetate as catalyst, N-hydroxyphthalimide as co-catalyst, and air as oxidant enabled the conversion of tertiary aromatic and aliphatic amines into α-aminophosphonates in moderate to excellent yields under mild conditions via a cross dehydrogenative coupling reaction.
May 22, 2018: Journal of Organic Chemistry
https://www.readbyqxmd.com/read/29786164/air-activated-self-decontaminating-polydicyclopentadiene-polyhipe-foams-for-rapid-decontamination-of-chemical-warfare-agents
#7
Christopher L McGann, Grant C Daniels, Spencer L Giles, Robert B Balow, Jorge L Miranda-Zayas, Jeffrey G Lundin, James H Wynne
The threat of chemical warfare agents (CWA) compels research into novel self-decontaminating materials (SDM) for the continued safety of first-responders, civilians, and active service personnel. The capacity to actively detoxify, as opposed to merely sequester, offending agents under typical environmental conditions defines the added value of SDMs in comparison to traditional adsorptive materials. Porous polymers, synthesized via the high internal phase emulsion (HIPE) templating, provide a facile fabrication method for materials with permeable open cellular structures that may serve in air filtration applications...
May 22, 2018: Macromolecular Rapid Communications
https://www.readbyqxmd.com/read/29786086/the-effect-of-autoimmune-retinopathy-on-retinal-vessel-oxygen-saturation
#8
Maria Waizel, Cengiz Türksever, Margarita G Todorova
PURPOSE: To study the retinal vessel oxygen saturation alterations in patients with autoimmune retinopathy (AIR) and patients with autoimmune retinopathy associated with retinitis pigmentosa (AIR-RP) in comparison with healthy controls and patients with isolated retinitis pigmentosa (RP). DESIGN: Prospective, cross-sectional, and non-interventional study. SUBJECTS: Retinal vessel oximetry (RO) was performed on a total of 139 eyes: six eyes suffering from AIR and four eyes with AIR-RP were compared to 59 healthy control eyes and to 70 eyes with RP...
May 22, 2018: Eye
https://www.readbyqxmd.com/read/29785958/association-between-hypertensive-disorders-in-pregnancy-and-particulate-matter-in-the-contiguous-united-states-1999-2004
#9
Tao Xue, Tong Zhu, Weiwei Lin, Evelyn O Talbott
Hypertensive disorders in pregnancy harm both maternal and infant health and have been linked to ambient particulate matter. However, existing studies are restricted to a local scale and remain inconsistent. A large-scale study is required to enrich the epidemiological evidence and explore the potential sources of the inconsistency. Making use of US birth certificates (1999-2004), and monitoring data from the environmental protection agency air quality networks, we associated hypertensive disorders in pregnancy with maternal exposure to fine particles or coarse particles using logistic regression analysis after adjusting for many covariates among >5 million subjects in the contiguous United States...
May 21, 2018: Hypertension
https://www.readbyqxmd.com/read/29785847/impact-of-water-induced-soil-erosion-on-the-terrestrial-transport-and-atmospheric-emission-of-mercury-in-china
#10
Maodian Liu, Qianru Zhang, Yao Luo, Robert P Mason, Shidong Ge, Yipeng He, Chenghao Yu, Rina Sa, Hanlin Cao, Xuejun Wang, Long Chen
Terrestrial mercury (Hg) transport, induced by water erosion and exacerbated by human activities, constitutes a major disturbance of the natural Hg cycle, but the processes are still not well understood. In this study, we modeled these processes using detailed information on erosion and Hg in soils and found that vast quantities of total Hg (THg) are being removed from land surfaces in China as a result of water erosion, which were estimated at 420 Mg/yr around 2010. This was significantly higher than the 240 Mg/yr mobilized around 1990...
May 22, 2018: Environmental Science & Technology
https://www.readbyqxmd.com/read/29785846/d-a-d-typed-hole-transport-materials-for-efficient-perovskite-solar-cells-tuning-photovoltaic-properties-via-the-acceptor-group
#11
Peng Xu, Peng Liu, Yuanyuan Li, Bo Xu, Lars Kloo, Licheng Sun, Yong Hua
Two D-A-D structured hole-transport materials (YN1 and YN2) have been synthesized and used in perovskite solar cells. The two HTMs have low-lying HOMO levels and impressive mobility. PSCs fabricated with YN2 showed a PCE value of 19.27% in ambient air, which is significantly higher than that of Spiro-OMeTAD (17.80%). PSCs based on YN1 showed an inferior PCE of 16.03%. We found that the incorporation of the stronger electron-withdrawing group in the HTM YN2 improves the PCE of PSCs. Furthermore, the YN2-based PSCs exhibit good long-term stability retaining 91...
May 22, 2018: ACS Applied Materials & Interfaces
https://www.readbyqxmd.com/read/29785657/novel-non-invasive-early-detection-of-lung-cancer-using-liquid-immunobiopsy-metabolic-activity-profiles
#12
Yochai Adir, Shoval Tirman, Shirley Abramovitch, Cynthia Botbol, Aviv Lutaty, Tali Scheinmann, Eyal Davidovits, Irit Arbel, Giora Davidovits, Sonia Schneer, Michal Shteinberg, Hagit Peretz Soroka, Ruven Tirosh, Fernando Patolsky
Lung cancer is the leading cause of cancer death worldwide. Survival is largely dependent on the stage of diagnosis: the localized disease has a 5-year survival greater than 55%, whereas, for spread tumors, this rate is only 4%. Therefore, the early detection of lung cancer is key for improving prognosis. In this study, we present an innovative, non-invasive, cancer detection approach based on measurements of the metabolic activity profiles of immune system cells. For each Liquid ImmunoBiopsy test, a 384 multi-well plate is loaded with freshly separated PBMCs, and each well contains 1 of the 16 selected stimulants in several increasing concentrations...
May 21, 2018: Cancer Immunology, Immunotherapy: CII
https://www.readbyqxmd.com/read/29785545/development-of-gp-and-gep-models-to-estimate-an-environmental-issue-induced-by-blasting-operation
#13
Roohollah Shirani Faradonbeh, Mahdi Hasanipanah, Hassan Bakhshandeh Amnieh, Danial Jahed Armaghani, Masoud Monjezi
Air overpressure (AOp) is one of the most adverse effects induced by blasting in the surface mines and civil projects. So, proper evaluation and estimation of the AOp is important for minimizing the environmental problems resulting from blasting. The main aim of this study is to estimate AOp produced by blasting operation in Miduk copper mine, Iran, developing two artificial intelligence models, i.e., genetic programming (GP) and gene expression programming (GEP). Then, the accuracy of the GP and GEP models has been compared to multiple linear regression (MLR) and three empirical models...
May 21, 2018: Environmental Monitoring and Assessment
https://www.readbyqxmd.com/read/29785430/staudinger-reaction-using-2-6-dichlorophenyl-azide-derivatives-for-robust-aza-ylide-formation-applicable-to-bioconjugation-in-living-cells
#14
Tomohiro Meguro, Norikazu Terashima, Harumi Ito, Yuka Koike, Isao Kii, Suguru Yoshida, Takamitsu Hosoya
Efficient formation of water- and air-stable aza-ylides has been achieved using the Staudinger reaction between electron-deficient aromatic azides such as 2,6-dichlorophenyl azide and triarylphosphines. The reaction proceeds rapidly and has been successfully applied to chemical modification of proteins in living cells.
May 22, 2018: Chemical Communications: Chem Comm
https://www.readbyqxmd.com/read/29785361/air-bubbles-in-the-urinary-tract-incidental-and-asymptomatic-combined-emphysematous-pyelitis-ureteritis-and-cystitis-a-rare-case-report-and-review-of-the-literature
#15
Ahmad Alenezi, Mohammed A K Al-Ruwaished, Ahmed Almujalhem
No abstract text is available yet for this article.
May 2018: Urology Case Reports
https://www.readbyqxmd.com/read/29785297/determination-of-the-intersegmental-plane-using-the-slip-knot-method
#16
Makoto Endoh, Hiroyuki Oizumi, Hirohisa Kato, Jun Suzuki, Hikaru Watarai, Akira Hamada, Katsuyuki Suzuki, Kenta Nakahashi, Mitsuaki Sadahiro
Background: Visualization of intersegmental planes in the lung is desirable for precise anatomical lung segmentectomy. We developed the slip-knot method for creating inflation-deflation lines. This study aimed to assess relevant data for thoracoscopic segmentectomy performed using this method. Methods: In the slip-knot method, the objective segmental bronchus is looped with a monofilament thread. One end of the thread is then pulled during temporary bilateral ventilation, causing the knot to slip toward the bronchus...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29785296/division-of-the-intersegmental-plane-using-electrocautery-for-segmentectomy-in-clinical-stage-i-non-small-cell-lung-cancer
#17
Mitsuyoshi Matsumoto, Koyo Shirahashi, Hirotaka Yamamoto, Yusaku Miyamaoto, Hiroyasu Komuro, Kiyoshi Doi, Hisashi Iwata
Background: Division of intersegmental planes is one of the important practical issues for segmentectomy to obtain feasible outcomes without relapse for clinical stage I non-small cell lung cancer. Almost all surgeons perform this procedure using a stapler. However, division of intersegmental planes for segmentectomy can also be performed by electrocautery. In this article, we demonstrate the merits and drawbacks of division of the intersegmental plane by electrocautery for segmentectomy...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29785292/thoracoscopic-stapler-based-bidirectional-segmentectomy-for-posterior-basal-segment-s10-and-its-variants
#18
Masaaki Sato, Tomonori Murayama, Jun Nakajima
Thoracoscopic segmentectomy for the posterior basal segment (S10) and its variant (e.g., S9+10 and S10b+c combined subsegmentectomy) is one of the most challenging anatomical segmentectomies. Stapler-based segmentectomy is attractive to simplify the operation and to prevent post-operative air leakage. However, this approach makes thoracoscopic S10 segmentectomy even more tricky. The challenges are caused mostly from the following three reasons: first, similar to other basal segments, "three-dimensional" stapling is needed to fold a cuboidal segment; second, the belonging pulmonary artery is not directly facing the interlobar fissure or the hilum, making identification of target artery difficult; third, the anatomy of S10 and adjacent segments such as superior (S6) and medial basal (S7) is variable...
April 2018: Journal of Thoracic Disease
https://www.readbyqxmd.com/read/29784937/an-oil-free-picodrop-bioassay-platform-for-synthetic-biology
#19
Christian A Siltanen, Russell H Cole, Sean Poust, Lawrence Chao, Jabus Tyerman, Benjamin Kaufmann-Malaga, Jeff Ubersax, Zev J Gartner, Adam R Abate
Droplet microfluidics enables massively-parallel analysis of single cells, biomolecules, and chemicals, making it valuable for high-throughput screens. However, many hydrophobic analytes are soluble in carrier oils, preventing their quantitative analysis with the method. We apply Printed Droplet Microfluidics to construct defined reactions with chemicals and cells incubated under air on an open array. The method interfaces with most bioanalytical tools and retains hydrophobic compounds in compartmentalized reactors, allowing their quantitation...
May 21, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29784934/investigation-on-the-structures-and-magnetic-properties-of-carbon-or-nitrogen-doped-cobalt-ferrite-nanoparticles
#20
Derang Cao, Lining Pan, Jianan Li, Xiaohong Cheng, Zhong Zhao, Jie Xu, Qiang Li, Xia Wang, Shandong Li, Jianbo Wang, Qingfang Liu
Carbon or nitrogen doped cobalt ferrite nanoparticles were synthesized in the air by a facile calcination process. X-ray diffraction, mapping, X-ray photoelectron spectroscopy, and mössbauer spectra results indicate that the nonmetal elements as the interstitial one are doped into cobalt ferrite nanoparticles. The morphologies of doped cobalt ferrite nanoparticles change from near-spherical to irregular cubelike shapes gradually with the increased carbon or nitrogen concentration, and their particles sizes also increase more than 200 nm...
May 21, 2018: Scientific Reports
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