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https://www.readbyqxmd.com/read/28437033/electrical-stress-influences-the-efficiency-of-ch3-nh3-pbi3-perovskite-light-emitting-devices
#1
Lianfeng Zhao, Jia Gao, YunHui L Lin, Yao-Wen Yeh, Kyung Min Lee, Nan Yao, Yueh-Lin Loo, Barry P Rand
Organic-inorganic hybrid perovskite materials are emerging as semiconductors with potential application in optoelectronic devices. In particular, perovskites are very promising for light-emitting devices (LEDs) due to their high color purity, low nonradiative recombination rates, and tunable bandgap. Here, using pure CH3 NH3 PbI3 perovskite LEDs with an external quantum efficiency (EQE) of 5.9% as a platform, it is shown that electrical stress can influence device performance significantly, increasing the EQE from an initial 5...
April 24, 2017: Advanced Materials
https://www.readbyqxmd.com/read/28436444/transcriptome-profiling-of-sulfate-deprivation-responses-in-two-agarophytes-gracilaria-changii-and-gracilaria-salicornia-rhodophyta
#2
Wei-Kang Lee, Parameswari Namasivayam, Janna Ong Abdullah, Chai-Ling Ho
Seaweeds survive in marine waters with high sulfate concentration compared to those living at freshwater habitats. The cell wall polymer of Gracilaria spp. which supplies more than 50% of the world agar is heavily sulfated. Since sulfation reduces the agar quality, it is interesting to investigate the effects of sulfate deprivation on the sulfate contents of seaweed and agar, as well as the metabolic pathways of these seaweeds. In this study, two agarophytes G. changii and G. salicornia were treated under sulfate deprivation for 5 days...
April 24, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28435776/-self-peel-off-transfer-produces-ultrathin-polyvinylidene-fluoride-based-flexible-nanodevices
#3
Yanlong Tai, Gilles Lubineau
Here, a new strategy, self-peel-off transfer, for the preparation of ultrathin flexible nanodevices made from polyvinylidene-fluoride (PVDF) is reported. In this process, a functional pattern of nanoparticles is transferred via peeling from a temporary substrate to the final PVDF film. This peeling process takes advantage of the differences in the work of adhesion between the various layers (the PVDF layer, the nanoparticle-pattern layer and the substrate layer) and of the high stresses generated by the differential thermal expansion of the layers...
April 2017: Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
https://www.readbyqxmd.com/read/28435340/stress-and-its-predictors-in-pregnant-women-a-study-in-saudi-arabia
#4
Anwar E Ahmed, Alhanouf N Albalawi, Asmaa A Alshehri, Rand M AlBlaihed, Majid A Alsalamah
BACKGROUND: Although stress during pregnancy has negative effects on children's development and pregnant women's health, no study has assessed stress and its predictors among pregnant Saudi women. The aim of this study was to assess stress and identify its predictors in a sample of pregnant Saudi women. METHODS: A correlational study was carried out at King Abdulaziz Medical City in Riyadh, Kingdom of Saudi Arabia, on 438 pregnant women who attended the obstetrics/gynecology clinic...
2017: Psychology Research and Behavior Management
https://www.readbyqxmd.com/read/28434212/effects-of-environmental-factors-on-cyanobacterial-production-of-odorous-compounds-geosmin-and-2-methylisoborneol
#5
Hyung-Seok Oh, Chang Soo Lee, Ankita Srivastava, Hee-Mock Oh, Chi-Yong Ahn
Geosmin and 2-methylisoborneol (2-MIB), responsible for earthy or musty smell, are a major concern for safe drinking water supplies. This study investigated the effects of environmental factors on odorous compounds production and cell growth in cyanobacterial strains. Anabaena sp. FACHB-1384, a 2-MIB producer, was sensitive to low temperature (<20°C). However, geosmin producers, Anabaena sp. Chusori and Anabaena sp. NIER, were sensitive to high light intensity (>100 μmol/m²/sec), but not to low temperature...
April 21, 2017: Journal of Microbiology and Biotechnology
https://www.readbyqxmd.com/read/28429296/diurnal-changes-in-transcript-and-metabolite-levels-during-the-iron-deficiency-response-of-rice
#6
Jamie Selby-Pham, Adrian Lutz, Laura T Moreno-Moyano, Berin A Boughton, Ute Roessner, Alexander A T Johnson
BACKGROUND: Rice (Oryza sativa L.) is highly susceptible to iron (Fe) deficiency due to low secretion levels of the mugineic acid (MA) family phytosiderophore (PS) 2'-deoxymugineic acid (DMA) into the rhizosphere. The low levels of DMA secreted by rice have proved challenging to measure and, therefore, the pattern of DMA secretion under Fe deficiency has been less extensively studied relative to other graminaceous monocot species that secrete high levels of PS, such as barley (Hordeum vulgare L...
December 2017: Rice
https://www.readbyqxmd.com/read/28427560/stress-adaptive-response-in-ovarian-cancer-drug-resistance-role-of-trap1-in-oxidative-metabolism-driven-inflammation
#7
Maria Rosaria Amoroso, Danilo Swann Matassa, Ilenia Agliarulo, Rosario Avolio, Francesca Maddalena, Valentina Condelli, Matteo Landriscina, Franca Esposito
Metabolic reprogramming is one of the most frequent stress-adaptive response of cancer cells to survive environmental changes and meet increasing nutrient requirements during their growth. These modifications involve cellular bioenergetics and cross talk with surrounding microenvironment, in a dynamic network that connect different molecular processes, such as energy production, inflammatory response, and drug resistance. Even though the Warburg effect has long been considered the main metabolic feature of cancer cells, recent reports identify mitochondrial oxidative metabolism as a driving force for tumor growth in an increasing number of cellular contexts...
2017: Advances in Protein Chemistry and Structural Biology
https://www.readbyqxmd.com/read/28424950/estimated-work-ability-in-warm-outdoor-environments-depends-on-the-chosen-heat-stress-assessment-metric
#8
Peter Bröde, Dusan Fiala, Bruno Lemke, Tord Kjellstrom
With a view to occupational effects of climate change, we performed a simulation study on the influence of different heat stress assessment metrics on estimated workability (WA) of labour in warm outdoor environments. Whole-day shifts with varying workloads were simulated using as input meteorological records for the hottest month from four cities with prevailing hot (Dallas, New Delhi) or warm-humid conditions (Managua, Osaka), respectively. In addition, we considered the effects of adaptive strategies like shielding against solar radiation and different work-rest schedules assuming an acclimated person wearing light work clothes (0...
April 19, 2017: International Journal of Biometeorology
https://www.readbyqxmd.com/read/28424566/influence-of-organic-molecules-on-the-aggregation-of-tio2-nanoparticles-in-acidic-conditions
#9
Karin Danielsson, Julián A Gallego-Urrea, Martin Hassellov, Stefan Gustafsson, Caroline M Jonsson
Engineered nanoparticles released into the environment may interact with natural organic matter (NOM). Surface complexation affects the surface potential, which in turn may lead to aggregation of the particles. Aggregation of synthetic TiO2 (anatase) nanoparticles in aqueous suspension was investigated at pH 2.8 as a function of time in the presence of various organic molecules and Suwannee River fulvic acid (SRFA), using dynamic light scattering (DLS) and high-resolution transmission electron microscopy (TEM)...
2017: Journal of Nanoparticle Research: An Interdisciplinary Forum for Nanoscale Science and Technology
https://www.readbyqxmd.com/read/28418855/a-review-and-outlook-in-the-treatment-of-osteosarcoma-and-other-deep-tumors-with-photodynamic-therapy-from-basic-to-deep
#10
REVIEW
Wei Yu, Jian Zhu, Yitian Wang, Junjie Wang, Weijing Fang, Kaishun Xia, Jianlin Shao, Minzu Wu, Bing Liu, Chengzhen Liang, Chengyi Ye, Huimin Tao
Photodynamic therapy, one of the most promising minimally invasive treatments, has received increasing focus in tumor therapy research, which has been widely applied in treating superficial tumors. Three basic factors - photosensitizer, the light source, and oxidative stress - are responsible for tumor cell cytotoxicity. However, due to insufficient luminous flux and peripheral tissue damage, the utilization of photodynamic therapy is facing a huge limitation in deep tumor therapy. Osteosarcoma is the typical deep tumor, which is the most commonly occurring malignancy in children and adolescents...
March 15, 2017: Oncotarget
https://www.readbyqxmd.com/read/28417457/effects-of-riboflavin-and-ultraviolet-light-treatment-on-platelet-thrombus-formation-and-thrombus-stability-on-collagen
#11
Chikahiro Terada, Masayuki Shiba, Tadashi Nagai, Masahiro Satake
BACKGROUND: Pathogen reduction technologies (PRTs) are considered for the implementation of safer platelet (PLT) transfusion. PRT treatment involves the addition of a photosensitizer to a blood component followed by ultraviolet (UV) light irradiation. However, the effects of PRT treatment on PLT thrombus formation and thrombus stability have not been satisfactorily clarified. STUDY DESIGN AND METHODS: Leukoreduced PLT concentrates (PCs) were treated with riboflavin and UV light (Mirasol PRT)...
April 17, 2017: Transfusion
https://www.readbyqxmd.com/read/28416696/zeaxanthin-dependent-nonphotochemical-quenching-does-not-occur-in-photosystem-i-in-the-higher-plant-arabidopsis-thaliana
#12
Lijin Tian, Pengqi Xu, Volha U Chukhutsina, Alfred R Holzwarth, Roberta Croce
Nonphotochemical quenching (NPQ) is the process that protects the photosynthetic apparatus of plants and algae from photodamage by dissipating as heat the energy absorbed in excess. Studies on NPQ have almost exclusively focused on photosystem II (PSII), as it was believed that NPQ does not occur in photosystem I (PSI). Recently, Ballottari et al. [Ballottari M, et al. (2014) Proc Natl Acad Sci USA 111:E2431-E2438], analyzing PSI particles isolated from an Arabidopsis thaliana mutant that accumulates zeaxanthin constitutively, have reported that this xanthophyll can efficiently induce chlorophyll fluorescence quenching in PSI...
April 17, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28412604/highlighting-the-differential-role-of-leaf-paraheliotropism-in-two-mediterranean-cistus-species-under-drought-stress-and-well-watered-conditions
#13
Giacomo Puglielli, Susana Redondo-Gómez, Loretta Gratani, Enrique Mateos-Naranjo
The differential degree by which paraheliotropism may counterbalance the deleterious impact of high irradiance between congeneric species in relation to different water availabilities has been poorly investigated. We followed the evolution of gas exchange, quenching analysis and OJIP parameters in restrained (R) and free (F) to move leaves of Cistus monspeliensis (CM) and Cistus salvifolius (CS) under drought stress (WS) and well-watered conditions (WW). Concerning gas exchange parameters, leaf restriction effect was overall not significant in CM except in apparent carboxylation efficiency (Ce) under WS, while CS showed a significant sensitivity of maximum net photosynthetic rate (Amax), stomatal conductance (gs) and Ce even under WW...
March 25, 2017: Journal of Plant Physiology
https://www.readbyqxmd.com/read/28411514/cylindrospermopsin-induced-changes-in-growth-toxin-production-and-antioxidant-response-of-acutodesmus-acuminatus-and-microcystis-aeruginosa-under-differing-light-and-nitrogen-conditions
#14
Mathias Ahii Chia, Micheline Kézia Cordeiro-Araújo, Adriana Sturion Lorenzi, Maria do Carmo Bittencourt-Oliveira
Growing evidence suggests that some bioactive metabolites (e.g. cyanotoxins) produced by cyanobacteria have allelopathic potential, due to their inhibitory or stimulatory effects on competing species. Although a number of studies have shown that the cyanotoxin cylindrospermopsin (CYN) has variable effects on phytoplankton species, the impact of changing physicochemical conditions on its allelopathic potential is yet to be investigated. We investigated the physiological response of Microcystis aeruginosa (Cyanobacteria) and Acutodesmus acuminatus (Chlorophyta) to CYN under varying nitrogen and light conditions...
April 12, 2017: Ecotoxicology and Environmental Safety
https://www.readbyqxmd.com/read/28402136/survey-of-discomfort-glare-from-the-headlamps-of-cars-widely-used-in-iran
#15
Ahmad Mehri, Somayeh Farhang Dehghan, Roohalah Hajizadeh, Seyed Abolfazl Zakerian, Hamzeh Mohammadi, Milad Abbasi
OBJECTIVE: In two-lane roads, a discomfort glare can cause annoyance, discomfort and inconvenience, stress and fatigue to drivers on the front line. This can cause accidents. The aim of this study is to evaluate the discomfort glare from the headlamps of cars widely used in Iran. METHODS: The discomfort glare of new vehicles including Pride Saba model GTX, Pride Model 131SL, Samand Soren, Peugeot 405, Megan, and Peugeot Pars was examined at distances of 5 to 100 metres and in background luminance of 50 cd/m(2) (late twilight / early dawn lighting) and 1 cd/m(2) (night time) by Schmidt-Clausen and Bindels model and de Boer subjective scale...
April 12, 2017: Traffic Injury Prevention
https://www.readbyqxmd.com/read/28401290/effects-of-competition-on-induction-of-crassulacean-acid-metabolism-in-a-facultative-cam-plant
#16
Kailiang Yu, Paolo D'Odorico, Wei Li, Yongli He
Abiotic drivers of environmental stress have been found to induce CAM expression (nocturnal carboxylation) in facultative CAM species such as Mesembryanthemum crystallinum. The role played by biotic factors such as competition with non-CAM species in affecting CAM expression, however, remains largely understudied. This research investigated the effects of salt and water conditions on the competition between M. crystallinum and the C3 grass Bromus mollis with which it is found to coexist in California's coastal grasslands...
April 11, 2017: Oecologia
https://www.readbyqxmd.com/read/28399045/a-differential-expression-of-uncoupling-protein-2-associates-with-renal-damage-in-stroke-resistant-spontaneously-hypertensive-rat-stroke-prone-spontaneously-hypertensive-rat-derived-stroke-congenic-lines
#17
Speranza Rubattu, Maria Cotugno, Franca Bianchi, Luigi Sironi, Paolo Gelosa, Rosita Stanzione, Maurizio Forte, Claudia De Sanctis, Michele Madonna, Simona Marchitti, Alice Pignieri, Sebastiano Sciarretta, Massimo Volpe
OBJECTIVES: Uncoupling protein-2 (UCP2), a mitochondrial anion transporter involved in mitochondrial uncoupling, limiting reactive oxygen species formation, is significantly downregulated in kidneys of high-salt-fed stroke-prone spontaneously hypertensive rat (SHRSP), where it associates with increased renal damage occurrence. METHODS: We aimed at establishing whether UCP2 differential expression associates with renal damage in two stroke-resistant spontaneously hypertensive rat (SHRSR)/SHRSP-derived stroke congenic lines...
April 10, 2017: Journal of Hypertension
https://www.readbyqxmd.com/read/28397633/psychosocial-interventions-for-children-and-adolescents-after-man-made-and-natural-disasters-a-meta-analysis-and-systematic-review
#18
R C Brown, A Witt, J M Fegert, F Keller, M Rassenhofer, P L Plener
Children and adolescents are a vulnerable group to develop post-traumatic stress symptoms after natural or man-made disasters. In the light of increasing numbers of refugees under the age of 18 years worldwide, there is a significant need for effective treatments. This meta-analytic review investigates specific psychosocial treatments for children and adolescents after man-made and natural disasters. In a systematic literature search using MEDLINE, EMBASE and PsycINFO, as well as hand-searching existing reviews and contacting professional associations, 36 studies were identified...
April 11, 2017: Psychological Medicine
https://www.readbyqxmd.com/read/28396364/novel-indole-based-tambjamine-analogues-induce-apoptotic-lung-cancer-cell-death-through-p38-mitogen-activated-protein-kinase-activation
#19
Pilar Manuel-Manresa, Luís Korrodi-Gregório, Elsa Hernando, Alberto Villanueva, David Martínez-García, Ananda M Rodilla, Ricard Ramos, Margarida Fardilha, Juan Moya, Roberto Quesada, Vanessa Soto-Cerrato, Ricardo Perez-Tomas
Lung cancer has become the leading killer cancer worldwide, due to late diagnosis and lack of efficient anticancer drugs. We have recently described novel natural-derived tambjamine analogues that are potent anion transporters capable of disrupting cellular ion balance, inducing acidification of the cytosol and hyperpolarization of cellular plasma membranes. Although these tambjamine analogues were able to compromise cell survival, their molecular mechanism of action remains largely unknown. Herein we characterize the molecular cell responses induced by highly active indole-based tambjamine analogues treatment in lung cancer cells...
April 10, 2017: Molecular Cancer Therapeutics
https://www.readbyqxmd.com/read/28396092/targeting-the-unfolded-protein-response-in-cancer
#20
REVIEW
Rani Ojha, Ravi K Amaravadi
Cancer cells are exposed to various intrinsic and extrinsic factors that disrupt protein homeostasis, producing endoplasmic reticulum (ER) stress. To cope with these situations, cancer cells evoke a highly conserved adaptive mechanism called the unfolded protein response (UPR) to restore the ER homeostasis. Recently, several pharmacological agents have been found to exhibit anti-tumor activity by targeting the UPR components. The development of potent and specific compounds that target the UPR components has not only shed light on the regulation of the UPR in cancer cells, but also brought the field closer to clinical drug candidates...
April 8, 2017: Pharmacological Research: the Official Journal of the Italian Pharmacological Society
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