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https://www.readbyqxmd.com/read/28509910/convergence-of-gut-microbiotas-in-the-adaptive-radiations-of-african-cichlid-fishes
#1
Laura Baldo, Joan Lluís Pretus, Joan Lluís Riera, Zuzana Musilova, Arnold Roger Bitja Nyom, Walter Salzburger
Ecoevolutionary dynamics of the gut microbiota at the macroscale level, that is, in across-species comparisons, are largely driven by ecological variables and host genotype. The repeated explosive radiations of African cichlid fishes in distinct lakes, following a dietary diversification in a context of reduced genetic diversity, provide a natural setup to explore convergence, divergence and repeatability in patterns of microbiota dynamics as a function of the host diet, phylogeny and environment. Here we characterized by 16S rRNA amplicon sequencing the gut microbiota of 29 cichlid species from two distinct lakes/radiations (Tanganyika and Barombi Mbo) and across a broad dietary and phylogenetic range...
May 16, 2017: ISME Journal
https://www.readbyqxmd.com/read/28509909/experimental-evolution-and-the-dynamics-of-adaptation-and-genome-evolution-in-microbial-populations
#2
Richard E Lenski
Evolution is an on-going process, and it can be studied experimentally in organisms with rapid generations. My team has maintained 12 populations of Escherichia coli in a simple laboratory environment for >25 years and 60 000 generations. We have quantified the dynamics of adaptation by natural selection, seen some of the populations diverge into stably coexisting ecotypes, described changes in the bacteria's mutation rate, observed the new ability to exploit a previously untapped carbon source, characterized the dynamics of genome evolution and used parallel evolution to identify the genetic targets of selection...
May 16, 2017: ISME Journal
https://www.readbyqxmd.com/read/28501360/cow-urine-indian-yellow-and-art-forgeries-an-update
#3
Gregory Dale Smith
In a recent technical note in this Journal, de Faria et al., 2017 [1] reported the Raman spectrum of authentic Indian yellow artists' pigment, correcting a decades old reference spectrum that has led to the misidentification of this pigment in artworks that actually contained tartrazine yellow. The present communication provides additional information and corrects important experimental details mentioned by de Faria et al. that should lead to further identifications of the authentic pigment in artworks. Despite their claim that the analysis of this naturally fluorescent colorant is only possible with Fourier transform (FT) instruments, the ready characterization of two authentic samples of historic Indian yellow pigment is demonstrated here using commonly available visible and near-infrared excitation sources on a dispersive Raman microspectrometer...
April 27, 2017: Forensic Science International
https://www.readbyqxmd.com/read/28499043/bioethics-and-transhumanism
#4
Allen Porter
Transhumanism is a "technoprogressive" socio-political and intellectual movement that advocates for the use of technology in order to transform the human organism radically, with the ultimate goal of becoming "posthuman." To this end, transhumanists focus on and encourage the use of new and emerging technologies, such as genetic engineering and brain-machine interfaces. In support of their vision for humanity, and as a way of reassuring those "bioconservatives" who may balk at the radical nature of that vision, transhumanists claim common ground with a number of esteemed thinkers and traditions, from the ancient philosophy of Plato and Aristotle to the postmodern philosophy of Nietzsche...
June 1, 2017: Journal of Medicine and Philosophy
https://www.readbyqxmd.com/read/28498720/protein-misfolding-amyloid-formation-and-human-disease-a-summary-of-progress-over-the-last-decade
#5
Fabrizio Chiti, Christopher M Dobson
Peptides and proteins have been found to possess an inherent tendency to convert from their native functional states into intractable amyloid aggregates. This phenomenon is associated with a range of increasingly common human disorders, including Alzheimer and Parkinson diseases, type II diabetes, and a number of systemic amyloidoses. In this review, we describe this field of science with particular reference to the advances that have been made over the last decade in our understanding of its fundamental nature and consequences...
May 12, 2017: Annual Review of Biochemistry
https://www.readbyqxmd.com/read/28498373/genomic-exploration-of-individual-giant-ocean-viruses
#6
William H Wilson, Ilana C Gilg, Mohammad Moniruzzaman, Erin K Field, Sergey Koren, Gary R LeCleir, Joaquín Martínez Martínez, Nicole J Poulton, Brandon K Swan, Ramunas Stepanauskas, Steven W Wilhelm
Viruses are major pathogens in all biological systems. Virus propagation and downstream analysis remains a challenge, particularly in the ocean where the majority of their microbial hosts remain recalcitrant to current culturing techniques. We used a cultivation-independent approach to isolate and sequence individual viruses. The protocol uses high-speed fluorescence-activated virus sorting flow cytometry, multiple displacement amplification (MDA), and downstream genomic sequencing. We focused on 'giant viruses' that are readily distinguishable by flow cytometry...
May 12, 2017: ISME Journal
https://www.readbyqxmd.com/read/28494470/comorbid-conditions-delay-diagnosis-of-colorectal-cancer-a-cohort-study-using-electronic-primary-care-records
#7
Luke T A Mounce, Sarah Price, Jose M Valderas, William Hamilton
BACKGROUND: Pre-existing non-cancer conditions may complicate and delay colorectal cancer diagnosis. METHOD: Incident cases (aged ⩾40 years, 2007-2009) with colorectal cancer were identified in the Clinical Practice Research Datalink, UK. Diagnostic interval was defined as time from first symptomatic presentation of colorectal cancer to diagnosis. Comorbid conditions were classified as 'competing demands' (unrelated to colorectal cancer) or 'alternative explanations' (sharing symptoms with colorectal cancer)...
May 11, 2017: British Journal of Cancer
https://www.readbyqxmd.com/read/28494169/companion-animals-in-natural-disasters-a-scoping-review-of-scholarly-sources
#8
Cheryl Travers, Chris Degeling, Melanie Rock
During a disaster, people may make evacuation decisions based on their companion animal's welfare, therefore exposing themselves, their companion animals, and emergency responders to increased risk for injury or death. The loss and suffering of companion animals in disasters causes deep distress, diminishing people's capacity to rebuild their lives. This scoping review presents scholarly research studies and reviews relating to people and their companion animals in the context of disasters, with an aim of informing researchers, policymakers, and practitioners and providing direction for future research...
May 11, 2017: Journal of Applied Animal Welfare Science: JAAWS
https://www.readbyqxmd.com/read/28489620/adult-desmoid-tumors-biology-management-and-ongoing-trials
#9
Nicolas Penel, Frédéric Chibon, Sébastien Salas
PURPOSE OF REVIEW: To summarize the current knowledge about the biology and clinical management of adult desmoid tumors. RECENT FINDINGS: In the past decade, we have learned that desmoid tumors are driven by alterations of the Wnt/APC/β-catenin pathway, sporadic desmoid tumors are associated with somatic mutations of CTNNB1, and germline mutations of APC and somatic mutations of CTNNB1 are probably mutually exclusive. One-third of desmoid tumors are misdiagnosed; a second pathological opinion is therefore of major importance for desmoid tumor...
May 9, 2017: Current Opinion in Oncology
https://www.readbyqxmd.com/read/28488681/practices-and-views-of-neurologists-regarding-the-use-of-whole-genome-sequencing-in-clinical-settings-a-web-based-survey
#10
Iris Jaitovich Groisman, Thierry Hurlimann, Amir Shoham, Béatrice Godard
The use of Whole-Genome Sequencing (WGS) in clinical settings has brought up a number of controversial scientific and ethical issues. The application of WGS is of particular relevance in neurology, as many conditions are difficult to diagnose. We conducted a worldwide, web-based survey to explore neurologists' views on the benefits of, and concerns regarding, the clinical use of WGS, as well as the resources necessary to implement it. Almost half of the 204 neurologists in the study treated mostly adult patients (48%), while the rest mainly children (37...
May 10, 2017: European Journal of Human Genetics: EJHG
https://www.readbyqxmd.com/read/28485520/murine-thymic-nk-cells-a-case-of-identity
#11
Victoria Male, Hugh J M Brady
Just over a decade ago, it was established that NK cells in the thymus do not follow precisely the same developmental pathway as conventional NK cells that develop in the bone marrow. Subsequently, it has emerged that NK cells are one branch of a family of innate lymphoid cells (ILCs). ILC1s and thymic NK cells have, however, sufficient similarities such that questions have been raised about how distinctive each cell type is from the other. In this issue of European Journal of Immunology, Gabrielli et al. [Eur...
May 2017: European Journal of Immunology
https://www.readbyqxmd.com/read/28479858/study-of-acupuncture-for-low-back-pain-in-recent-20-years-a-bibliometric-analysis-via-citespace
#12
Yu-Dan Liang, Ying Li, Jian Zhao, Xiao-Yin Wang, Hui-Zheng Zhu, Xiu-Hua Chen
BACKGROUND: Acupuncture has been applied to relieve low back pain (LBP) in many countries. However, a bibliometric analysis of the global use of acupuncture for LBP is rare. OBJECTIVE: The aim of this study was to demonstrate the state of the art and trends concerning the global use of acupuncture for LBP in recent 20 years. METHODS: Literature relating to acupuncture for LBP from 1997 to 2016 was retrieved from Web of Science. CiteSpace was used to analyze country/institution, cited journals, authors/cited authors, cited references, and keywords...
2017: Journal of Pain Research
https://www.readbyqxmd.com/read/28478707/cover-stories-an-emerging-aesthetic-of-prestige-science
#13
Guoyan Wang, Jane Gregory, Xi Cheng, Yuting Yao
Our statistical analysis of research publications in the prestigious scientific journals Nature, Science and Cell reveals that papers represented by an image on the journal's cover gain many more citations in the academic literature than those papers in the same journals that are not represented on the cover. Meanwhile, the number of images used by high-prestige journals is much higher than that used by journals in general, which indicates both the emergence of a new aesthetic of prestige scientific publication, and also that this aesthetic is relevant to journals' impact...
May 1, 2017: Public Understanding of Science
https://www.readbyqxmd.com/read/28477249/research-development-current-hotspots-and-future-directions-of-water-research-based-on-modis-images-a-critical-review-with-a-bibliometric-analysis
#14
Yibo Zhang, Yunlin Zhang, Kun Shi, Xiaolong Yao
Water is essential for life as it provides drinking water and food for humans and animals. Additionally, the water environment provides habitats for numerous species and plays an important role in hydrological, nutrient, and carbon cycles. Among the existing natural resources on Earth's surface, water is the most extensive as it covers more than 70% of the Earth. To gather a comprehensive understanding of the focus of past, present, and future directions of remote sensing water research, we provide an alternative perspective on water research using moderate resolution imaging spectroradiometer (MODIS) imagery by conducting a comparative quantitative and qualitative analysis of research development, current hotspots, and future directions using a bibliometric analysis...
May 5, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28473081/acr-appropriateness-criteria-%C3%A2-breast%C3%A2-pain
#15
Peter M Jokich, Lisa Bailey, Carl D'Orsi, Edward D Green, Anna I Holbrook, Su-Ju Lee, Ana P Lourenco, Martha B Mainiero, Linda Moy, Karla A Sepulveda, Priscilla J Slanetz, Sunita Trikha, Monica M Yepes, Mary S Newell
Breast pain (or tenderness) is a common symptom, experienced by up to 80% of women at some point in their lives. Fortunately, it is rarely associated with breast cancer. However, breast pain remains a common cause of referral for diagnostic breast imaging evaluation. Appropriate workup depends on the nature and focality of the pain, as well as the age of the patient. Imaging evaluation is usually not indicated if the pain is cyclic or nonfocal. For focal, noncyclic pain, imaging may be appropriate, mainly for reassurance and to identify treatable causes...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28473071/acr-appropriateness-criteria-%C3%A2-hematospermia
#16
Keyanoosh Hosseinzadeh, Aytekin Oto, Brian C Allen, Fergus V Coakley, Barak Friedman, Pat F Fulgham, Matthew S Hartman, Matthew T Heller, Christopher Porter, V Anik Sahni, Gary S Sudakoff, Sadhna Verma, Carolyn L Wang, Don C Yoo, Erick M Remer, Steven C Eberhardt
Most men with hematospermia or hemospermia (HS) are young (<40 years of age), presenting with transient or episodic HS without other signs or symptoms of disease. The condition is self-limiting in most cases and idiopathic in nature. When a cause can be identified, infections of the urogenital tract are the most common. Imaging does not play a role in this patient population. In older men (>40 years of age), clinical screening for prostate cancer is advised. Furthermore, when HS is persistent or has symptoms, causes include obstruction or stricture at the level of the verumontanum, calcifications or calculi in the prostate, ejaculatory ducts or seminal vesicles, and cysts arising within these structures...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28473070/acr-appropriateness-criteria-%C3%A2-evaluation-of-nipple-discharge
#17
Su-Ju Lee, Sunita Trikha, Linda Moy, Paul Baron, Roberta M diFlorio, Edward D Green, Samantha L Heller, Anna I Holbrook, Alana A Lewin, Ana P Lourenco, Bethany L Niell, Priscilla J Slanetz, Ashley R Stuckey, Nina S Vincoff, Susan P Weinstein, Monica M Yepes, Mary S Newell
Appropriate imaging evaluation of nipple discharge depends the nature of the discharge. Imaging is not indicated for women with physiologic nipple discharge. For evaluation of pathologic nipple discharge, multiple breast imaging modalities are rated for evidence-based appropriateness under various scenarios. For women age 40 or older, mammography or digital breast tomosynthesis (DBT) should be the initial examination. Ultrasound is usually added as a complementary examination, with some exceptions. For women age 30 to 39, either mammogram or ultrasound may be used as the initial examination on the basis of institutional preference...
May 2017: Journal of the American College of Radiology: JACR
https://www.readbyqxmd.com/read/28462058/barriers-to-the-use-of-personal-health-records-by-patients-a-structured-review
#18
Chris Showell
INTRODUCTION: An increasing focus on personal electronic health records (PHRs) offers healthcare benefits for patients, particularly those in undeserved and marginalised populations, who are at risk of receiving less effective healthcare, and may have worse health outcomes. However, PHRs are likely to favour text, technical and health literate users, and be less suitable for disadvantaged patients. These concerns have prompted this review of the literature, which seeks evidence about barriers to the adoption and continued use of PHRs, the nature of the evidence for those barriers, and the stage of PHR implementation where particular barriers apply...
2017: PeerJ
https://www.readbyqxmd.com/read/28450052/chromatic-blur-perception-in-the-presence-of-luminance-contrast
#19
Ben J Jennings, Frederick A A Kingdom
Hel-Or showed that blurring the chromatic but not the luminance layer of an image of a natural scene failed to elicit any impression of blur. Subsequent studies have suggested that this effect is due either to chromatic blur being masked by spatially contiguous luminance edges in the scene (Journal of Vision 13 (2013) 14), or to a relatively compressed transducer function for chromatic blur (Journal of Vision 15 (2015) 6). To test between the two explanations we conducted experiments using as stimuli both images of natural scenes as well as simple edges...
May 3, 2017: Vision Research
https://www.readbyqxmd.com/read/28447650/announcement-nature-journals-support-the-san-francisco-declaration-on-research-assessment
#20
EDITORIAL
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April 26, 2017: Nature
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