Read by QxMD icon Read


Abdullah A Al-Ghamdi, Hosam O Elansary
Salinity is one of the major agricultural problems that may threat food security and limit the agricultural lands expansion worldwide. Exploring novel tools controlling saline conditions and increase valuable secondary metabolites in the horticultural crops might have outstanding results that serve humanity in the current century. The current study explores the effects of weekly seaweed extracts (7 mL  L-1 ) and/or 5-aminolevulinic acid (3, 5 and 10 ppm) sprays on Asparagus aethiopicus plants subjected to saline stress conditions (2000 and 4000 ppm) for 6 weeks in two consecutive seasons of 2016 and 2017...
June 9, 2018: Plant Physiology and Biochemistry: PPB
Yanyan Fang, Zhiqiang Nie, Jinzhong Yang, Qingqi Die, Yajun Tian, Feng Liu, Jie He, Jianyuan Wang, Qifei Huang
Soil, air, tree bark, rice, wheat, invertebrates, and chicken tissues around a typical endosulfan-contaminated site were analyzed in each season in each of two years. The total endosulfan (the sum of α-, β-endosulfan and endosulfan sulfate) were significantly different in soil and air samples collected in the four seasons (P < 0.01) and the mean concentrations were 6.53 ng/g dry weight (d.w.) and 2.40 ng/m3 , respectively, in autumn, 3.32 ng/g d.w. and 2.48 ng/m3 , respectively, in winter, 2...
June 12, 2018: Ecotoxicology and Environmental Safety
Javier Castro-Jiménez, Richard Sempéré
Organophosphate ester (OPE) flame retardants and plasticizers have been detected at generally high frequencies (70-98%) for the first time in the atmosphere over the NW African coastal Mediterranean. Results from sixty air samples (total suspended particles, TSP) collected between March 2015 and January 2016 in an urban coastal site (Bizerte, Tunisia) revealed ∑9 OPE concentrations of ~100-1060 pg m-3 (470 pg m-3 , median) with TCPPs, EHDPP and TiBP exhibiting the higher median concentrations (~110, 100 and 85 pg m-3 , respectively)...
June 12, 2018: Science of the Total Environment
Flávia M Lanna, Fernanda P Werneck, Marcelo Gehara, Emanuel M Fonseca, Guarino R Colli, Jack W Sites, Miguel T Rodrigues, Adrian A Garda
The Pleistocenic Arc Hypothesis (PAH) posits that South American Seasonally Dry Tropical Forests (SDTF) were interconnected during Pleistocene glacial periods, enabling the expansion of species ranges that were subsequently fragmented in interglacial periods, promoting speciation. The lizard genus Lygodactylus occurs in Africa, Madagascar, and South America. Compared to the high diversity of African Lygodactylus, only two species are known to occur in South America, L. klugei and L. wetzeli, distributed in SDTFs and the Chaco, respectively...
June 12, 2018: Molecular Phylogenetics and Evolution
Kuen-Cheh Yang, Hui-Fang Hung, Meng-Kan Chen, Li-Sheng Chen, Jean Ching-Yuan Fann, Sherry Yueh-Hsia Chiu, Amy-Ming Fang Yen, Kuo-Chin Huang, Hsiu-Hsi Chen, Sen-Te Wang
OBJECTIVES: Despite the fact that vaccination is an effective primary prevention strategy for containing influenza outbreak, health policymakers show great concern over enormous costs involved in universal immunization particularly when resources are limited. METHODS: We conducted a two-arm cost-effectiveness analysis (CEA) that takes into account the aspect of herd immunity, using a study cohort that was composed of 100,000 residents with the make-up of demographic characteristics identical to those of the underlying population in Taipei County, Taiwan, during the epidemic influenza season of 2001-2002...
June 12, 2018: International Journal of Infectious Diseases: IJID
Logan C Brooks, David C Farrow, Sangwon Hyun, Ryan J Tibshirani, Roni Rosenfeld
Accurate and reliable forecasts of seasonal epidemics of infectious disease can assist in the design of countermeasures and increase public awareness and preparedness. This article describes two main contributions we made recently toward this goal: a novel approach to probabilistic modeling of surveillance time series based on "delta densities", and an optimization scheme for combining output from multiple forecasting methods into an adaptively weighted ensemble. Delta densities describe the probability distribution of the change between one observation and the next, conditioned on available data; chaining together nonparametric estimates of these distributions yields a model for an entire trajectory...
June 15, 2018: PLoS Computational Biology
Tom De Smedt, Elizabeth Merrall, Denis Macina, Silvia Perez-Vilar, Nick Andrews, Kaatje Bollaerts
BACKGROUND: Studies of vaccine effectiveness (VE) rely on accurate identification of vaccination and cases of vaccine-preventable disease. In practice, diagnostic tests, clinical case definitions and vaccination records often present inaccuracies, leading to biased VE estimates. Previous studies investigated the impact of non-differential disease misclassification on VE estimation. METHODS: We explored, through simulation, the impact of non-differential and differential disease- and exposure misclassification when estimating VE using cohort, case-control, test-negative case-control and case-cohort designs...
2018: PloS One
Ruth Ayanful-Torgby, Neils B Quashie, Johnson N Boampong, Kim C Williamson, Linda E Amoah
Plasmodium falciparum infections presenting either as symptomatic or asymptomatic may contain sexual stage parasites (gametocytes) that are crucial to malaria transmission. In this study, the prevalence of microscopic and submicroscopic asexual and gametocyte parasite stages were assessed in asymptomatic children from two communities in southern Ghana. Eighty children aged twelve years and below, none of whom exhibited signs of clinical malaria living in Obom and Cape Coast were sampled twice, one during the rainy (July 2015) and subsequently during the dry (January 2016) season...
2018: PloS One
Aileen Y Chang, Edith C Tonui, Douglas Momanyi, Alex R Mills, Paul Wasike, Rakhi Karwa, Toby A Maurer, Sonak D Pastakia
INTRODUCTION: Compression therapy is well-established standard of care for chronic leg ulcers from venous disease and lymphedema. Chronic leg ulcers and lymphedema have a significant impact on quality of life, driven by pain, foul odor, and restricted mobility. Provision of layered compression therapy in resource-limited settings, as in Western Kenya and other regions of sub-Saharan Africa, is a major challenge due to several barriers: availability, affordability, and access to healthcare facilities...
June 15, 2018: Dermatology and Therapy
Xun Zhang, Tingting Hu, Lu Yang, Zhiyong Guo
The occurrence of 15 perfluoroalkyl substances (PFASs) in water, sediments, and fish from Songhua River and Yalu River in Jilin Province, Northeast China, during their spring flood period were investigated for the first time. The short-chain perfluorobutanoic acid was the dominant PFAS in the water with the mean concentrations of 10 ng L-1 in Songhua River and 9.0 ng L-1 in Yalu River, and also dominant in sediments with the mean concentrations of 2.0 and 1.8 ng g-1 dry weight. Perfluorodecane sulfonate was the predominant compound in fish...
June 15, 2018: Bulletin of Environmental Contamination and Toxicology
Stephanie M Jagemann, Jennifer Juzwik, Patrick C Tobin, Kenneth F Raffa
Oak wilt is a lethal disease caused by the invasive fungus Bretziella fagacearum, which is transmitted belowground via root grafts and aboveground by sap beetles (Nitidulidae). Attempts to limit spread and impact of B. fagacearum emphasize limiting harvesting and pruning to periods of vector inactivity. However, there is limited information on sap beetle activity periods, responses to temperature, and phoresy frequencies of fungi. We sampled two major vectors in Wisconsin, Colopterus truncatus and Carpophilus sayi, for 2 yr to quantify their seasonal and geographic abundances...
June 14, 2018: Environmental Entomology
Gh Halabi, N Bulanova, S Aleksandrova, G Ivanov, M Aleksandrova
Objective - to access seasonal variation of microvolt T-wave alternans of ECG dispersion mapping in patients with cardiovascular disease and healthy subjects. ECG data of the three groups of healthy subjects have been compared: inhabitants of Beirut, Lebanon (n=51), inhabitants of Moscow, Russia (n=94) and ECG data of healthy subjects (n=44) from the testing ECG database of the PTB - The National Metrology Institute of Germany as well as a group of patients with cardiovascular disease (n=138), inhabitants of Beirut, Lebanon...
May 2018: Georgian Medical News
Kirstin Bilham, Chris Newman, Christina D Buesching, Michael J Noonan, Amy Boyd, Adrian L Smith, David W Macdonald
Wild-living animals are subject to weather variability that may cause the generation of reactive oxygen species, resulting in oxidative stress and tissue damage, potentially driving demographic responses. Our 3-yr field study investigated the effects of seasonal weather conditions on biomarkers for oxidative stress, oxidative damage, and antioxidant defense in the European badger (Meles meles). We found age class effects: cubs were more susceptible to oxidative stress and oxidative damage than adults, especially very young cubs in the spring, when they also exhibited lower antioxidant biomarkers than adults...
July 2018: Physiological and Biochemical Zoology: PBZ
O Ogunsemowo, D O Olaleye, G N Odaibo
Human respiratory syncytial virus (HRSV) causes high morbidity and mortality in infants and young children. Although a high prevalence of HRSV has been reported in Nigeria, the subtype of the virus circulating in the country is not known. This crosssectional study was therefore designed to determine the subtypes of HRSV circulating among children in Ibadan. Two hundred and thirty-one nasopharyngeal and oropharyngeal swabs were collected from children presenting with respiratory infections in Secondary Health Facility (SHF) as well as those attending immunization centers in Primary Health Centers (PHCs) in Ibadan, Nigeria...
February 2018: Archives of basic and applied medicine
Debra Ann Reilly, Steve Langan
Channeling feelings into the written word rather than the scalpel was at the heart of the creative writing challenge that the first author (DR) accepted when she joined the Seven Doctors Project at the University of Nebraska Medical Center in 2008. Burnout has become recognized as a factor undermining physicians' quality of life, and the practice of creative writing helps mitigate stress and sustain a successful practice. When physicians partner with and are mentored by a seasoned creative writer, creative writing can serve as an exercise in ethical reflection, which is particularly valuable at mid-career; this is the subject of the following dialogue between one physician writer and the facilitator of the Seven Doctors Project creative writing class...
June 1, 2018: AMA Journal of Ethics
Yi Zhang, Zhidong Cao, Valentina Costantino, David J Muscatello, Abrar Ahmad Chughtai, Peng Yang, Quanyi Wang, C Raina MacIntyre
BACKGROUND: The benefit of school-based influenza vaccination policy has not been fully addressed in Beijing. OBJECTIVES: To evaluate the benefit of school-based influenza vaccination policy launched in Beijing. METHODS: Using existing surveillance and immunization data, we developed a dynamic transmission model to assess the impact of influenza vaccination in school-going children. The outcome was defined as the averted number of medically attended influenza illnesses and the prevented disease fraction to all children aged 5-14 years for the 2013/14, 2014/15, and 2015/16 seasons...
June 14, 2018: Influenza and Other Respiratory Viruses
Robyn M Lucas, Rachel E Neale, Sasha Madronich, Richard L McKenzie
Exposure of the skin to ultraviolet (UV) radiation is the main risk factor for skin cancer, and a major source of vitamin D, in many regions of the world. Sun protection messages to minimize skin cancer risks but avoid vitamin D deficiency are challenging, partly because levels of UV radiation vary by location, season, time of day, and atmospheric conditions. The UV Index provides information on levels of UV radiation and is a cornerstone of sun protection guidelines. Current guidelines from the World Health Organization are that sun protection is required only when the UV Index is 3 or greater...
June 15, 2018: Photochemical & Photobiological Sciences
Adebanji S Ogbiye, Olumuyiwa O Onakunle, David O Omole
The dataset analyzed in this article contains spatial and temporal values of the hydro-geometric parameters of River Atuwara. The hydro-geometrical data analyses of various sampling point on River Atuwara was examined and their geometric properties were taken with the use of a paddled boat, depth meter and global positioning system (GPS). The co-ordinates, width, depth, slopes, area, velocity, flow were gotten in-situ while the area and wetted perimeter were computed ex-situ. The statistical relationships between separate variables were considered using scatter plots and regression line equations...
June 2018: Data in Brief
Rieta Gols, Nicole M van Dam, Michael Reichelt, Jonathan Gershenzon, Ciska E Raaijmakers, James M Bullock, Jeffrey A Harvey
Levels of plant secondary metabolites are not static and often change in relation to plant ontogeny. They also respond to abiotic and biotic changes in the environment, e.g., they often increase in response to biotic stress, such as herbivory. In contrast with short-lived annual plant species, especially those with growing periods of less than 2-3 months, investment in defensive compounds of vegetative tissues in biennial and perennial species may also vary over the course of an entire growing season. In garden experiments, we investigated the dynamics of secondary metabolites, i...
2018: Chemoecology
Lida Xing, Edward L Stanley, Ming Bai, David C Blackburn
Frogs are a familiar and diverse component of tropical forests around the world. Yet there is little direct evidence from the fossil record for the antiquity of this association. We describe four fossil frog specimens from mid-Cretaceous (~99 mya) amber deposits from Kachin State, Myanmar for which the associated fauna provides rich paleoenvironmental context. Microcomputed tomographic analysis provides detailed three-dimensional anatomy for these small frogs, which is generally unavailable for articulated anurans in the Mesozoic...
June 14, 2018: Scientific Reports
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"