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https://www.readbyqxmd.com/read/28749611/morphology-ultrastructure-and-molecular-phylogeny-of-rozella-multimorpha-a-new-species-in-cryptomycota
#1
Peter M Letcher, Joyce E Longcore, Timothy Y James, Domingos S Leite, D Rabern Simmons, Martha J Powell
Increasing numbers of sequences of basal fungi from environmental DNA studies are being deposited in public databases. Many of these sequences remain unclassified below the phylum level because sequence information from identified species is sparse. Lack of basic biological knowledge due to a dearth of identified species is extreme in Cryptomycota, a new phylum widespread in the environment and phylogenetically basal within the fungal lineage. Consequently, we are attempting to fill gaps in the knowledge of Rozella, the best-known genus in this lineage...
July 27, 2017: Journal of Eukaryotic Microbiology
https://www.readbyqxmd.com/read/28748934/synergy-of-synthesis-computation-and-nmr-reveals-correct-baulamycin-structures
#2
Jingjing Wu, Paula Lorenzo, Siying Zhong, Muhammad Ali, Craig P Butts, Eddie L Myers, Varinder K Aggarwal
Small-molecule, biologically active natural products continue to be our most rewarding source of, and inspiration for, new medicines. Sometimes we happen upon such molecules in minute quantities in unique, difficult-to-reach, and often fleeting environments, perhaps never to be discovered again. In these cases, determining the structure of a molecule-including assigning its relative and absolute configurations-is paramount, enabling one to understand its biological activity. Molecules that comprise stereochemically complex acyclic and conformationally flexible carbon chains make such a task extremely challenging...
July 26, 2017: Nature
https://www.readbyqxmd.com/read/28747884/geomagnetic-navigation-of-autonomous-underwater-vehicle-based-on-multi-objective-evolutionary-algorithm
#3
Hong Li, Mingyong Liu, Feihu Zhang
This paper presents a multi-objective evolutionary algorithm of bio-inspired geomagnetic navigation for Autonomous Underwater Vehicle (AUV). Inspired by the biological navigation behavior, the solution was proposed without using a priori information, simply by magnetotaxis searching. However, the existence of the geomagnetic anomalies has significant influence on the geomagnetic navigation system, which often disrupts the distribution of the geomagnetic field. An extreme value region may easily appear in abnormal regions, which makes AUV lost in the navigation phase...
2017: Frontiers in Neurorobotics
https://www.readbyqxmd.com/read/28746936/defining-standards-in-experimental-microsurgical-training-recommendations-of-the-european-society-for-surgical-research-essr-and-the-international-society-for-experimental-microsurgery-isem
#4
René H Tolba, Zoltán Czigány, Suzanne Osorio Lujan, Mihai Oltean, Michael Axelsson, Yelena Akelina, Antonio Di Cataldo, Iren Miko, Istvan Furka, Uta Dahmen, Eiji Kobayashi, Mihai Ionac, Norbert Nemeth
BACKGROUND: Expectations towards surgeons in modern surgical practice are extremely high with minimal complication rates and maximal patient safety as paramount objectives. Both of these aims are highly dependent on individual technical skills that require sustained, focused, and efficient training outside the clinical environment. At the same time, there is an increasing moral and ethical pressure to reduce the use of animals in research and training, which has fundamentally changed the practice of microsurgical training and research...
July 26, 2017: European Surgical Research. Europäische Chirurgische Forschung. Recherches Chirurgicales Européennes
https://www.readbyqxmd.com/read/28746891/long-term-variations-in-sediment-heavy-metals-of-a-reservoir-with-changing-trophic-states-implications-for-the-impact-of-climate-change
#5
Qiong Wu, Jun Qi, Xinghui Xia
Two dated sediment cores from the Miyun Reservoir of Beijing in China were analyzed to reconstruct the pollution history of heavy metals including cadmium (Cd), chromium (Cr), iron (Fe), nickel (Ni), and zinc (Zn) as well as phosphorus (P). Enrichment factor (EF) and geoaccumulation index (Igeo) were applied to assess the enrichment status of heavy metals. Average EF and Igeo values indicated that the studied heavy metals in the sediments mainly originated from non-point source pollution and soil-water erosion, showing low ecological risks...
July 23, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28746381/hedgehogs-on-the-move-testing-the-effects-of-land-use-change-on-home-range-size-and-movement-patterns-of-free-ranging-ethiopian-hedgehogs
#6
Mohammad A Abu Baker, Nigel Reeve, April A T Conkey, David W Macdonald, Nobuyuki Yamaguchi
Degradation and alteration of natural environments because of agriculture and other land uses have major consequences on vertebrate populations, particularly on spatial organization and movement patterns. We used GPS tracking to study the effect of land use and sex on the home range size and movement of a typical model species, the Ethiopian hedgehogs. We used free-ranging hedgehogs from two areas with different land use practices: 24 from an area dominated by irrigated farms (12 ♂♂, 12 ♀♀) and 22 from a natural desert environment within a biosphere reserve (12 ♂♂, 10 ♀♀)...
2017: PloS One
https://www.readbyqxmd.com/read/28745705/-the-outcomes-of-lower-extremities-burn-wounds-management-by-using-of-controlled-moist-environment
#7
N N Karyakin, I A Klemenova, A S Luzan
AIM: To the outcomes of lower extremities burn wounds management by using of controlled moist environment. MATERIAL AND METHODS: Burn wounds management by using of controlled moist environment in 23 patients is presented in the article. Physiological moist conditions on the surface of wounds were created with isotonic sodium chloride solution and sterile polyethylene diaphanous containers. Сontrol group included 12 patients who were treated with hydrocolloid patch...
2017: Khirurgiia
https://www.readbyqxmd.com/read/28743300/public-attitudes-towards-gambling-product-harm-and-harm-reduction-strategies-an-online-study-of-16-88%C3%A2-year-olds-in-victoria-australia
#8
Samantha L Thomas, Melanie Randle, Amy Bestman, Hannah Pitt, Steven J Bowe, Sean Cowlishaw, Mike Daube
BACKGROUND: Gambling has quickly emerged as an important global public health issue. With new technologies used to develop high intensity gambling products and promotions aimed at driving consumption, public health organisations and researchers, community groups, and politicians have argued for a range of regulatory and education measures aimed at reducing gambling harm. However, there has been limited research seeking to understand community perceptions of the harms associated with gambling products and environments, and the level of community support for strategies designed to prevent and reduce gambling harm...
July 25, 2017: Harm Reduction Journal
https://www.readbyqxmd.com/read/28742824/how-do-rehomed-laboratory-beagles-behave-in-everyday-situations-results-from-an-observational-test-and-a-survey-of-new-owners
#9
Dorothea Döring, Ophelia Nick, Alexander Bauer, Helmut Küchenhoff, Michael H Erhard
When laboratory dogs are rehomed into private households, they experience an extreme change in their life situation. They leave their familiar, limited environment in the research facility and encounter a multitude of animate and inanimate stimuli in their new home. Although literature reports have described the experiences with rehoming as being mostly positive, scientific observations of the dogs in everyday situations have not been done. Hence, we conducted an observational test with 74 laboratory beagles 6 weeks after adoption in their new homes...
2017: PloS One
https://www.readbyqxmd.com/read/28739052/a-51-item-calcium-focused-food-frequency-questionnaire-is-a-reliable-tool-to-assess-dietary-calcium-intake-in-postmenopausal-women
#10
Angel M Ong, Hope A Weiler, Michelle Wall, David Goltzman, Susan J Whiting, Stella S Daskalopoulou, Suzanne N Morin
Given the lack in a valid biomarker to assess dietary calcium intake (dCai), reproducible estimation of usual dCai is crucial for better understanding of its interaction with health outcomes in specific populations. This study tested the hypothesis that a calcium-focused food frequency questionnaire (FFQ) may be used to estimate dCai of women ≥50 years residing in a multicultural environment (Montreal, Canada). One hundred and eight women (age, 63.1±7.7 years; 98% postmenopausal) completed the FFQ twice and 4 nonconsecutive 24-hour recalls (24HRs) over 1 month...
July 2017: Nutrition Research
https://www.readbyqxmd.com/read/28738805/spatial-variability-of-excess-mortality-during-prolonged-dust-events-in-a-high-density-city-a-time-stratified-spatial-regression-approach
#11
Man Sing Wong, Hung Chak Ho, Lin Yang, Wenzhong Shi, Jinxin Yang, Ta-Chien Chan
BACKGROUND: Dust events have long been recognized to be associated with a higher mortality risk. However, no study has investigated how prolonged dust events affect the spatial variability of mortality across districts in a downwind city. METHODS: In this study, we applied a spatial regression approach to estimate the district-level mortality during two extreme dust events in Hong Kong. We compared spatial and non-spatial models to evaluate the ability of each regression to estimate mortality...
July 24, 2017: International Journal of Health Geographics
https://www.readbyqxmd.com/read/28738752/physical-functioning-and-activities-of-daily-living-in-adults-with-amyoplasia-the-most-common-form-of-arthrogryposis-a-cross-sectional-study
#12
Unni Steen, Lena Lande Wekre, Nina Køpke Vøllestad
BACKGROUND: Amyoplasia, the most common form of arthrogryposis is characterized by typical deformities of the joints and replacement of skeletal muscles by fibrous tissue and fat. There is sparse literature on adaptation to adult life with amyoplasia. PURPOSE: To describe physical function and activity strategies in adults with amyoplasia, as this knowledge is important for relevant function-enhancing measures. MATERIALS AND METHODS: Twenty-two adults (20-91 years) with amyoplasia participated...
July 24, 2017: Disability and Rehabilitation
https://www.readbyqxmd.com/read/28738170/removal-of-pfoa-in-groundwater-by-fe-0-and-mno2-nanoparticles-under-visible-light
#13
Jia Liu, Lindsey Weinholtz, Linan Zheng, Meisam Peiravi, Yan Wu, Da Chen
The main objective of this study was to find a cost-effective, efficient and environmentally-friendly solution to remove perfluorooctanic acid (PFOA) from groundwater by using Fe(0) and MnO2 nanoparticles. The selected method was expected to be applicable to the remediation of PFOA-contaminated groundwater. Phytotoxicity of the nanoparticle treatment was studied to demonstrate the safe application of the nanomaterials. Zero-valent Fe (100 mg L(-1)) and MnO2 (100 mg L(-1)) nanoparticles, produced in our lab, were used to remove PFOA up to 10 mg L(-1)...
July 24, 2017: Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering
https://www.readbyqxmd.com/read/28737704/toxicity-at-the-edge-of-life-a-review-on-cyanobacterial-toxins-from-extreme-environments
#14
REVIEW
Samuel Cirés, María Cristina Casero, Antonio Quesada
Cyanotoxins are secondary metabolites produced by cyanobacteria, of varied chemical nature and toxic effects. Although cyanobacteria thrive in all kinds of ecosystems on Earth even under very harsh conditions, current knowledge on cyanotoxin distribution is almost restricted to freshwaters from temperate latitudes. In this review, we bring to the forefront the presence of cyanotoxins in extreme environments. Cyanotoxins have been reported especially in polar deserts (both from the Arctic and Antarctica) and alkaline lakes, but also in hot deserts, hypersaline environments, and hot springs...
July 24, 2017: Marine Drugs
https://www.readbyqxmd.com/read/28736050/effects-of-aeration-and-leachate-recirculation-on-methyl-mercaptan-emissions-from-landfill
#15
Siyuan Zhang, Yuyang Long, Yuan Fang, Yao Du, Weijia Liu, Dongsheng Shen
The issue of odorous volatile organic sulfur compound methyl mercaptan (MM) released from landfill sites cannot be ignored for its extremely low odor threshold and high toxicity. In this study, we focused on the formation and emission of MM in four lab-scaled simulated landfill reactors running in different operation modes, namely, R1 and R2, without leachate recirculation, running under anaerobic and semi-aerobic atmosphere, R3 and R4, with leachate recirculation, running under anaerobic and semi-aerobic atmosphere, respectively...
July 20, 2017: Waste Management
https://www.readbyqxmd.com/read/28736041/construction-of-multilayer-alginate-hydrogel-beads-for-oral-delivery-of-probiotics-cells
#16
Yang Li, Chao Feng, Jing Li, Yuzhi Mu, Ya Liu, Ming Kong, Xiaojie Cheng, Xiguang Chen
Multilayer alginate hydrogel beads (MAHBs), which were prepared by emulsion method, had been fabricated via the ionic crosslinking between calcium ion (Ca(2+)) and carboxylic group of alginate and utilized as encapsulating material for oral delivery of a model probiotic bacteria Bifidobacterium breve. Optical and fluorescence microscopy obviously showed the microorganism cells were encapsulated in the core beads. The viability of B. breve cells encapsulated in MAHBs was significantly enhanced compared with ordinary free cultured ones, the top CFU per mL were (3...
July 20, 2017: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/28735389/the-fundamental-role-of-reactive-oxygen-species-in-plant-stress-response
#17
Michael Liebthal, Karl-Josef Dietz
Chemical, physical, and biotic factors continuously vary in the natural environment. Such parameters are considered as stressors if the magnitude of their change exceeds the current acclimation norm of the plant. Activation of genetic programs allows for conditional expansion of the acclimation norm and depends on specific sensing mechanisms, intracellular communication, and regulation. The redox and reactive oxygen species (ROS) network plays a fundamental role in directing the acclimation response. These highly reactive compounds like H2O2 are generated and scavenged under normal conditions and participate in realizing a basal acclimation level...
2017: Methods in Molecular Biology
https://www.readbyqxmd.com/read/28732151/patients-attitudes-and-experiences-of-disease-modifying-anti-rheumatic-drugs-in-rheumatoid-arthritis-and-spondyloarthritis-a-qualitative-synthesis
#18
Ayano Kelly, Kathleen Tymms, David J Tunnicliffe, Daniel Sumpton, Chandima Perera, Kieran Fallon, Jonathan C Craig, Walter Abhayaratna, Allison Tong
OBJECTIVES: Non-adherence to disease-modifying anti-rheumatic drugs (DMARDS) in rheumatoid arthritis (RA) and spondyloarthritis (SpA) results in increased disease activity and symptoms and poorer quality of life. We aimed to describe patients' attitudes and experiences of DMARDs in RA and SpA to inform strategies to improve medication adherence. METHODS: Databases (MEDLINE, Embase, PsycINFO, CINAHL) were searched to January 2016. Thematic synthesis was used to analyze the findings...
July 21, 2017: Arthritis Care & Research
https://www.readbyqxmd.com/read/28732062/a-drosophila-model-for-toxicogenomics-genetic-variation-in-susceptibility-to-heavy-metal-exposure
#19
Shanshan Zhou, Sarah E Luoma, Genevieve E St Armour, Esha Thakkar, Trudy F C Mackay, Robert R H Anholt
The genetic factors that give rise to variation in susceptibility to environmental toxins remain largely unexplored. Studies on genetic variation in susceptibility to environmental toxins are challenging in human populations, due to the variety of clinical symptoms and difficulty in determining which symptoms causally result from toxic exposure; uncontrolled environments, often with exposure to multiple toxicants; and difficulty in relating phenotypic effect size to toxic dose, especially when symptoms become manifest with a substantial time lag...
July 21, 2017: PLoS Genetics
https://www.readbyqxmd.com/read/28731472/high-abundance-and-expression-of-transposases-in-bacteria-from-the-baltic-sea
#20
Theoden Vigil-Stenman, Karolina Ininbergs, Birgitta Bergman, Martin Ekman
Transposases are mobile genetic elements suggested to have an important role in bacterial genome plasticity and host adaptation but their transcriptional activity in natural bacterial communities is largely unexplored. Here we analyzed metagenomes and -transcriptomes of size fractionated (0.1-0.8, 0.8-3.0 and 3.0-200 μm) bacterial communities from the brackish Baltic Sea, and adjacent marine waters. The Baltic Sea transposase levels, up to 1.7% of bacterial genes and 2% of bacterial transcripts, were considerably higher than in marine waters and similar to levels reported for extreme environments...
July 21, 2017: ISME Journal
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