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https://www.readbyqxmd.com/read/28231259/impact-of-seasonality-and-air-pollutants-on-carotid-femoral-pulse-wave-velocity-and-wave-reflection-in-hypertensive-patients
#1
Marina Di Pilla, Rosa Maria Bruno, Francesco Stea, Luciano Massetti, Stefano Taddei, Lorenzo Ghiadoni, Pietro Amedeo Modesti
OBJECTIVE: The effects of seasonality on blood pressure (BP) and cardiovascular (CV) events are well established, while the influence of seasonality and other environmental factors on arterial stiffness and wave reflection has never been analyzed. This study evaluated whether seasonality (daily number of hours of light) and acute variations in outdoor temperature and air pollutants may affect carotid-femoral pulse wave velocity (PWV) and pressure augmentation. DESIGN AND METHOD: 731 hypertensive patients (30-88 years, 417 treated) were enrolled in a cross-sectional study during a 5-year period...
2017: PloS One
https://www.readbyqxmd.com/read/28225978/daylight-photodynamic-therapy-experience-and-safety-in-treatment-of-actinic-keratoses-of-the-face-and-scalp-in-low-latitude-and-high-brightness-region
#2
Luiz Eduardo Garcia Galvão, Heitor de Sá Gonçalves, Karine Paschoal Botelho, Juliana Chagas Caldas
Daylight photodynamic therapy has been used in countries with high latitudes during the summer for actinic keratoses treatment with reports of similar efficacy to conventional photodynamic therapy. We evaluate its safety in 20 patients in the city of Fortaleza, a local with low latitude and high brightness. Sixteen patients did not report any discomfort due to the procedure. Daylight photodynamic therapy is an easy application method with great tolerability by the patient and has the possibility of being performed throughout the year in these regions...
January 2017: Anais Brasileiros de Dermatologia
https://www.readbyqxmd.com/read/28222225/daylight-photodynamic-therapy-vs-conventional-photodynamic-therapy-as-skin-cancer-preventive-treatment-in-patients-with-face-and-scalp-cancerization-an-intra-individual-comparison-study
#3
Elena Sotiriou, Demetrios Ioannides, Fotini Vrani, Elizabeth Lazaridou, Efstratios Vakirlis, Aimilios Lallas, Zoe Apalla
BACKGROUND: Individuals with medical history of non-melanoma skin cancers (NMSCs) usually develop multiple and/or recurrent malignant lesions around the site of the primary neoplasm. The latter represents the clinical expression of the "field cancerization" theory; supporting the presence of multiple malignant clones of dysplastic keratinocytes over the entire epithelium that potentially can progress into clinical lesions. Taking into consideration that the burden of NMSCs on public health and health-care cost is high, adequate control of recurrences and management of field change is challenging...
February 21, 2017: Journal of the European Academy of Dermatology and Venereology: JEADV
https://www.readbyqxmd.com/read/28208235/warmer-night-time-temperature-promotes-microbial-heterotrophic-activity-and-modifies-stream-sediment-community
#4
Anna Freixa, Vicenç Acuña, Maria Casellas, Stoyana Pecheva, Anna M Romaní
Diel temperature patterns are changing because of global warming, with higher temperatures being predicted to be more pronounced at night. Biological reactions are temperature dependent, with some occurring only during the daylight hours (e.g., light photosynthesis) and other during the entire day (e.g., respiration). Consequently, we expect the modification of daily temperature cycles to alter microbial biological reactions in stream sediments. Here, we aimed to study the effect of warming and changes of the diel temperature patterns on stream sediment biofilm functions tied to organic carbon decomposition, as well as on biofilm meiofaunal community structure...
February 16, 2017: Global Change Biology
https://www.readbyqxmd.com/read/28206710/sucrose-transporter2-contributes-to-maize-growth-development-and-crop-yield
#5
Kristen A Leach, Thu M Tran, Thomas L Slewinski, Robert B Meeley, David M Braun
During daylight, plants produce excess photosynthates, including sucrose, which is temporarily stored in the vacuole. At night, plants remobilize sucrose to sustain metabolism and growth. Based on homology to other sucrose transporter (SUT) proteins, we hypothesized the maize (Zea mays) SUCROSE TRANSPORTER2 (ZmSUT2) protein functions as a sucrose/H(+) symporter on the vacuolar membrane to export transiently stored sucrose. To understand the biological role of ZmSut2, we examined its spatial and temporal gene expression, determined the protein subcellular localization, and characterized loss-of-function mutations...
February 16, 2017: Journal of Integrative Plant Biology
https://www.readbyqxmd.com/read/28203032/icelandic-herring-eating-killer-whales-feed-at-night
#6
Gaëtan Richard, Olga A Filatova, Filipa I P Samarra, Ivan D Fedutin, Marc Lammers, Patrick J Miller
Herring-eating killer whales debilitate herring with underwater tail slaps and likely herd herring into tighter schools using a feeding-specific low-frequency pulsed call ('herding' call). Feeding on herring may be dependent upon daylight, as the whales use their white underside to help herd herring; however, feeding at night has not been investigated. The production of feeding-specific sounds provides an opportunity to use passive acoustic monitoring to investigate feeding behaviour at different times of day...
2017: Marine Biology
https://www.readbyqxmd.com/read/28199748/daylight-photodynamic-therapy-with-methylene-blue-in-plane-warts-a-randomized-double-blind-placebo-controlled-study
#7
G Fathy, M K Asaad, H M Rashid
Photodynamic therapy (PDT) is a technique that utilizes reactive oxygen species produced by a non-toxic dye or photosensitizer molecule in the presence of low intensity visible light to kill mammalian or microbial cells ((1)) . The advantages of PDT are numerous, it is a safe, non-invasive technique which yields effective therapeutic results ((2)) . Photodynamic therapy is not free of adverse effects. The most common one is pain during illumination. With the use of portable light sources to optimize the procedure and facilitate outpatient treatment, the concept of ambulatory PDT has emerged...
February 15, 2017: Photodermatology, Photoimmunology & Photomedicine
https://www.readbyqxmd.com/read/28193812/coping-with-copepods-do-right-whales-eubalaena-glacialis-forage-visually-in-dark-waters
#8
Thomas W Cronin, Jeffry I Fasick, Lorian E Schweikert, Sönke Johnsen, Lorren J Kezmoh, Mark F Baumgartner
North Atlantic right whales (Eubalaena glacialis) feed during the spring and early summer in marine waters off the northeast coast of North America. Their food primarily consists of planktonic copepods, Calanus finmarchicus, which they consume in large numbers by ram filter feeding. The coastal waters where these whales forage are turbid, but they successfully locate copepod swarms during the day at depths exceeding 100 m, where light is very dim and copepod patches may be difficult to see. Using models of E...
April 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28193809/living-in-the-dark-does-not-mean-a-blind-life-bird-and-mammal-visual-communication-in-dim-light
#9
REVIEW
Vincenzo Penteriani, María Del Mar Delgado
For many years, it was believed that bird and mammal communication 'in the dark of the night' relied exclusively on vocal and chemical signalling. However, in recent decades, several case studies have conveyed the idea that the nocturnal world is rich in visual information. Clearly, a visual signal needs a source of light to work, but diurnal light (twilight included, i.e. any light directly dependent on the sun) is not the only source of luminosity on this planet. Actually, moonlight represents a powerful source of illumination that cannot be neglected from the perspective of visual communication...
April 5, 2017: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28182529/sleepy-punishers-are-harsh-punishers
#10
Kyoungmin Cho, Christopher M Barnes, Cristiano L Guanara
The degree of punishment assigned to criminals is of pivotal importance for the maintenance of social order and cooperation. Nonetheless, the amount of punishment assigned to transgressors can be affected by factors other than the content of the transgressions. We propose that sleep deprivation in judges increases the severity of their sentences. We took advantage of the natural quasi-manipulation of sleep deprivation during the shift to daylight saving time in the spring and analyzed archival data from judicial punishment handed out in the U...
February 2017: Psychological Science
https://www.readbyqxmd.com/read/28174774/bipyridine-based-metallogels-an-unprecedented-difference-in-photochemical-and-chemical-reduction-in-the-in-situ-nanoparticle-formation
#11
Rajendhraprasad Tatikonda, Kia Bertula, Nonappa, Sami Hietala, Kari Rissanen, Matti Haukka
Metal co-ordination induced supramolecular gelation of low molecular weight organic ligands is a rapidly expanding area of research due to the potential in creating hierarchically self-assembled multi-stimuli responsive materials. In this context, structurally simple O-methylpyridine derivatives of 4,4'-dihydroxy-2,2'-bipyridine ligands are reported. Upon complexation with Ag(i) ions in aqueous dimethyl sulfoxide (DMSO) solutions the ligands spontaneously form metallosupramolecular gels at concentrations as low as 0...
February 8, 2017: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/28168711/voltage-sensitive-conductances-increase-the-sensitivity-of-rod-photoresponses-following-pigment-bleaching
#12
Johan Pahlberg, Rikard Fredriksen, Gabriel E Pollock, Kiyoharu J Miyagishima, Alapakkam P Sampath, M Carter Cornwall
A majority of our visual experience occurs during the day when a substantial fraction of the visual pigment in our photoreceptor cells is bleached. Under these conditions it is widely believed that rods are saturated and do not contribute substantially to downstream signaling. However, behavioral experiments on subjects with only rod function reveals that these individuals unexpectedly retain substantial vision in daylight. We sought to understand this discrepancy by characterizing the sensitivity of rod photoresponses following exposure to bright bleaching light...
February 7, 2017: Journal of Physiology
https://www.readbyqxmd.com/read/28166901/effects-of-ambient-illumination-contrast-polarity-and-letter-size-on-text-legibility-under-glance-like-reading
#13
Jonathan Dobres, Nadine Chahine, Bryan Reimer
Recent research on the legibility of digital displays has demonstrated a "positive polarity advantage", in which black-on-white text configurations are more legible than their negative polarity, white-on-black counterparts. Existing research in this area suggests that the positive polarity advantage stems from the brighter illumination emitted by positive polarity displays, as opposed to the darker backgrounds of negative polarity displays. In the present study, legibility thresholds were measured under glance-like reading conditions using a lexical decision paradigm, testing two type sizes, display polarities, and ambient illuminations (near-dark and daylight-like)...
April 2017: Applied Ergonomics
https://www.readbyqxmd.com/read/28163981/current-advances-in-5-aminolevulinic-acid-mediated-photodynamic-therapy
#14
Connor Thunshelle, Rui Yin, Qiquan Chen, Michael R Hamblin
Kennedy and Pottier discovered that photodynamic therapy (PDT) could be carried out using a procedure consisting of topical application of the porphyrin-precursor, 5-aminolevulinic acid (ALA) to the skin, followed after some time by illumination with various light parameters in the 1980s. Since then, ALA-PDT has expanded enormously and now covers most aspects of dermatological disease. The purpose of this review is to discuss a range of ingenious strategies that investigators have devised for improving the overall outcome (higher efficiency and lower side effects) of ALA-PDT...
September 2016: Current Dermatology Reports
https://www.readbyqxmd.com/read/28161779/interactions-of-amino-acids-with-aluminum-octacarboxyphthalocyanine-hydroxide-experimental-and-dft-studies
#15
Marta Kliber-Jasik, Małgorzata A Broda, Anna Maroń, Joanna Nackiewicz
The influence of albumin and amino acids (L-serine, glycine, L-histidine, L-tryptophan, L-cysteine) on the properties of aluminum octacarboxyphthalocyanine hydroxide (Al(OH)PcOC) was investigated in a phosphate buffer (pH 8.0). Particular attention was paid to the spectroscopic properties and photostability of Al(OH)PcOC. The effect of albumin or amino acids on the photodegradation of Al(OH)PcOC was examined in water using red light: 685 nm and daylight irradiation. Analysis of kinetic curves indicated that interaction with those molecules increases the photostability of Al(OH)PcOC...
February 2017: Journal of Molecular Modeling
https://www.readbyqxmd.com/read/28156172/impact-of-daylight-savings-time-on-spontaneous-pregnancy-loss-in-in-vitro-fertilization-patients
#16
Constance Liu, Joseph A Politch, Evan Cullerton, Kathryn Go, Samuel Pang, Wendy Kuohung
Transition into daylight savings time (DST) has studied negative impacts on health, but little is known regarding impact on fertility. This retrospective cohort study evaluates DST impact on pregnancy and pregnancy loss rates in 1,654 autologous in vitro fertilization cycles (2009 to 2012). Study groups were identified based on the relationship of DST to embryo transfer. Pregnancy rates were similar in Spring and Fall (41.4%, 42.2%). Pregnancy loss rates were also comparable between Spring and Fall (15.5%, 17...
February 3, 2017: Chronobiology International
https://www.readbyqxmd.com/read/28146253/the-most-reasonable-explanation-of-the-dress-implicit-assumptions-about-illumination
#17
Christoph Witzel, Chris Racey, J Kevin O'Regan
Millions of Internet users around the world challenged science by asking why a certain photo of a dress led different observers to have surprisingly different judgments about the color of the dress. The reason this particular photo produces so diverse a variety of judgments presumably is that the photo allows a variety of interpretations about the illumination of the dress. The most obvious explanation from color science should be that observers have different implicit assumptions about the illumination in the photo...
February 1, 2017: Journal of Vision
https://www.readbyqxmd.com/read/28145687/phototransformation-of-the-herbicide-propanil-in-paddy-field-water
#18
Luca Carena, Marco Minella, Francesco Barsotti, Marcello Brigante, Marco Milan, Aldo Ferrero, Silvia Berto, Claudio Minero, Davide Vione
When irradiated in paddy-field water, propanil (PRP) undergoes photodegradation by direct photolysis, by reactions with ·OH and CO3·-, and possibly also with the triplet states of chromophoric dissolved organic matter. Irradiation also inhibits the non-photochemical (probably biological) degradation of PRP. The dark and light-induced pathways can be easily distinguished because 3,4-dichloroaniline (34DCA, a transformation intermediate of considerable environmental concern) is produced with almost 100% yield in the dark but not at all through photochemical pathways...
February 1, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28145576/differences-in-competitive-ability-for-the-occupancy-of-shelters-in-triatomines
#19
C A Zacharias, S A Minoli, G Manrique
Triatomines (Hemiptera: Reduviidae: Triatominae) are nocturnal blood-sucking insects. During daylight hours they remain in an akinetic state inside their shelters, whereas at dusk they become active and move outside. When they are outside their shelters during the photophase, triatomines are vulnerable to diurnal predators and the period just before dawn is critical to their survival. This work analyses the existence of competitive interactions involved in the occupancy of shelters by triatomines. Behavioural assays were performed in which nymphs of different stages, nutritional status or species were released in an experimental arena containing a space-limited artificial shelter...
February 1, 2017: Medical and Veterinary Entomology
https://www.readbyqxmd.com/read/28143742/cone-genesis-tracing-by-the-chrnb4-egfp-mouse-line-evidences-of-cellular-material-fusion-after-cone-precursor-transplantation
#20
Sarah Decembrini, Catherine Martin, Florian Sennlaub, Sylvain Chemtob, Martin Biel, Marijana Samardzija, Alexandre Moulin, Francine Behar-Cohen, Yvan Arsenijevic
The cone function is essential to mediate high visual acuity, color vision, and daylight vision. Inherited cone dystrophies and age-related macular degeneration affect a substantial percentage of the world population. To identify and isolate the most competent cells for transplantation and integration into the retina, cone tracing during development would be an important added value. To that aim, the Chrnb4-EGFP mouse line was characterized throughout retinogenesis. It revealed a sub-population of early retinal progenitors expressing the reporter gene that is progressively restricted to mature cones during retina development...
January 28, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
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