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https://www.readbyqxmd.com/read/28721523/from-endosymbionts-to-host-communities-factors-determining-the-reproductive-success-of-arthropod-vectors
#1
Irit Messika, Mario Garrido, Hadar Kedem, Victor China, Yoni Gavish, Qunfeng Dong, Clay Fuqua, Keith Clay, Hadas Hawlena
Elucidating the factors determining reproductive success has challenged scientists since Darwin, but the exact pathways that shape the evolution of life history traits by connecting extrinsic (e.g., landscape structure) and intrinsic (e.g., female's age and endosymbionts) factors and reproductive success have rarely been studied. Here we collected female fleas from wild rodents in plots differing in their densities and proportions of the most dominant rodent species. We then combined path analysis and model selection approaches to explore the network of effects, ranging from micro to macroscales, determining the reproductive success of these fleas...
July 18, 2017: Oecologia
https://www.readbyqxmd.com/read/28716424/molecular-cloning-of-an-ester-forming-triterpenoid-udp-glucose-28-o-glucosyltransferase-involved-in-saponin-biosynthesis-from-the-medicinal-plant-centella-asiatica
#2
Fernanda de Costa, Carla J S Barber, Yeon-Bok Kim, Darwin W Reed, Haixia Zhang, Arthur G Fett-Neto, Patrick S Covello
Triterpene saponins include bioactive compounds with structures consisting of triterpene aglycones (sapogenins) and one or more sugar moieties linked through acetal or ester glycosidic linkages at one or more sites. Centella asiatica (L.) Urban is a medicinal plant that contains bioactive ursane-type saponins, such as madecassoside and asiaticoside. In this work, glucosylation of triterpenoids in C. asiatica was investigated starting with plant extracts. An enzyme capable of glucosylating asiatic and madecassic acids was partially purified...
September 2017: Plant Science: An International Journal of Experimental Plant Biology
https://www.readbyqxmd.com/read/28715506/analysis-of-aquaporins-from-the-euryhaline-barnacle-balanus-improvisus-reveals-differential-expression-in-response-to-changes-in-salinity
#3
Ulrika Lind, Michael Järvå, Magnus Alm Rosenblad, Piero Pingitore, Emil Karlsson, Anna-Lisa Wrange, Emelie Kamdal, Kristina Sundell, Carl André, Per R Jonsson, Jon Havenhand, Leif A Eriksson, Kristina Hedfalk, Anders Blomberg
Barnacles are sessile macro-invertebrates, found along rocky shores in coastal areas worldwide. The euryhaline bay barnacle Balanus improvisus (Darwin, 1854) (= Amphibalanus improvisus) can tolerate a wide range of salinities, but the molecular mechanisms underlying the osmoregulatory capacity of this truly brackish species are not well understood. Aquaporins are pore-forming integral membrane proteins that facilitate transport of water, small solutes and ions through cellular membranes, and that have been shown to be important for osmoregulation in many organisms...
2017: PloS One
https://www.readbyqxmd.com/read/28710222/a-developmental-evaluation-to-enhance-stakeholder-engagement-in-a-wide-scale-interactive-project-disseminating-quality-improvement-data-study-protocol-for-a-mixed-methods-study
#4
Alison Laycock, Jodie Bailie, Veronica Matthews, Frances Cunningham, Gillian Harvey, Nikki Percival, Ross Bailie
INTRODUCTION: Bringing together continuous quality improvement (CQI) data from multiple health services offers opportunities to identify common improvement priorities and to develop interventions at various system levels to achieve large-scale improvement in care. An important principle of CQI is practitioner participation in interpreting data and planning evidence-based change. This study will contribute knowledge about engaging diverse stakeholders in collaborative and theoretically informed processes to identify and address priority evidence-practice gaps in care delivery...
July 13, 2017: BMJ Open
https://www.readbyqxmd.com/read/28707113/genetically-engineered-hairy-root-cultures-of-hyoscyamus-senecionis-and-h-muticus-ploidy-as-a-promising-parameter-in-the-metabolic-engineering-of-tropane-alkaloids
#5
Esmaeil Dehghan, Darwin W Reed, Patrick S Covello, Zeinab Hasanpour, Javier Palazon, Kirsi-Marja Oksman-Caldentey, Farajollah Shahriari Ahmadi
Tetraploidy improves overexpression of h6h and scopolamine production of H. muticus, while in H. senecionis, pmt overexpression and elicitation can be used as effective methods for increasing tropane alkaloids. The effects of metabolic engineering in a polyploid context were studied by overexpression of h6h in the tetraploid hairy root cultures of H. muticus. Flow cytometry analysis indicated genetic stability in the majority of the clones, while only a few clones showed genetic instability. Among all the diploid and tetraploid clones, the highest level of h6h transgene expression and scopolamine accumulation was interestingly observed in the tetraploid clones of H...
July 13, 2017: Plant Cell Reports
https://www.readbyqxmd.com/read/28688123/insular-mammalian-fauna-dynamics-and-paleogeography-a-lesson-from-the-western-mediterranean-islands
#6
Maria Rita Palombo
Since the time of Darwin (1859) and Wallace (1869), islands have been regarded by scientists as a prime target for scrutinizing the forces that may influence evolution and diversification and important elements in biogeographic studies. This research aims to scrutinize whether and to what extent the composition and structure of past mammal insular faunas and their changes through time, may provide sound clues for inferring the paleogeographical evolution of a region. As a case study I have to critically analyzed the dynamics shown by the Plio-Pleistocene mammalian fauna of three Western Mediterranean insular districts, Balearic Islands, Sardinia, and Sicily, each characterized by its on peculiar paleobiogeographical evolutionary history...
July 7, 2017: Integrative Zoology
https://www.readbyqxmd.com/read/28686689/correction-prevalence-and-extent-of-heteroresistance-by-next-generation-sequencing-of-multidrug-resistant-tuberculosis
#7
Darwin J Operario, Alexander F Koeppel, Stephen D Turner, Yongde Bao, Suporn Pholwat, Sayera Banu, Suporn Foongladda, Stellah Mpagama, Jean Gratz, Oleg Ogarkov, Svetlana Zhadova, Scott K Heysell, Eric R Houpt
[This corrects the article DOI: 10.1371/journal.pone.0176522.].
2017: PloS One
https://www.readbyqxmd.com/read/28677219/the-nectar-spur-is-not-only-a-simple-specialization-for-long-proboscid-pollinators
#8
Anna Vlašánková, Eliška Padyšáková, Michael Bartoš, Ximo Mengual, Petra Janečková, Štěpán Janeček
Since the time of Darwin, biologists have considered the floral nectar spur to be an adaptation representing a high degree of plant specialization. Nevertheless, some researchers suggest that nature is more complex and that even morphologically specialized plants attract a wide spectrum of visitors. We observed visitors on Impatiens burtonii (Balsaminaceae) and measured the depth of the proboscis insertion into the spur, the distance of the nectar surface from the spur entrance and the visitor's effectiveness...
July 5, 2017: New Phytologist
https://www.readbyqxmd.com/read/28676780/prolonged-interruption-of-cognitive-control-of-conflict-processing-over-human-faces-by-task-irrelevant-emotion-expression
#9
Jinyoung Kim, Min-Suk Kang, Yang Seok Cho, Sang-Hun Lee
As documented by Darwin 150 years ago, emotion expressed in human faces readily draws our attention and promotes sympathetic emotional reactions. How do such reactions to the expression of emotion affect our goal-directed actions? Despite the substantial advance made in the neural mechanisms of both cognitive control and emotional processing, it is not yet known well how these two systems interact. Here, we studied how emotion expressed in human faces influences cognitive control of conflict processing, spatial selective attention and inhibitory control in particular, using the Eriksen flanker paradigm...
2017: Frontiers in Psychology
https://www.readbyqxmd.com/read/28674404/third-person-self-talk-facilitates-emotion-regulation-without-engaging-cognitive-control-converging-evidence-from-erp-and-fmri
#10
Jason S Moser, Adrienne Dougherty, Whitney I Mattson, Benjamin Katz, Tim P Moran, Darwin Guevarra, Holly Shablack, Ozlem Ayduk, John Jonides, Marc G Berman, Ethan Kross
Does silently talking to yourself in the third-person constitute a relatively effortless form of self control? We hypothesized that it does under the premise that third-person self-talk leads people to think about the self similar to how they think about others, which provides them with the psychological distance needed to facilitate self control. We tested this prediction by asking participants to reflect on feelings elicited by viewing aversive images (Study 1) and recalling negative autobiographical memories (Study 2) using either "I" or their name while measuring neural activity via ERPs (Study 1) and fMRI (Study 2)...
July 3, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28671488/darwin-and-women-a-selection-of-letters
#11
Emilie J Raymer
No abstract text is available yet for this article.
July 3, 2017: Annals of Science
https://www.readbyqxmd.com/read/28669417/st-george-mivart-as-popularizer-of-zoology-in-britain-and-america-1869-1881
#12
Emma E Swain
Recent scholarly attentions have shifted from key actors within the scientific elite and religious authorities to scientific practitioners and popularizers who used science to pursue a wide variety of cultural purposes. The Roman Catholic zoologist St. George Mivart (1827-1900) has typically been cast as a staunch anti-Darwinian ostracized by Darwin's inner circle of scientific naturalists. Understood as a popularizer of science, his position can be re-thought. Mivart did not operate on the periphery of Victorian science...
June 29, 2017: Endeavour
https://www.readbyqxmd.com/read/28665680/detecting-darwinism-from-molecules-in-the-enceladus-plumes-jupiter-s-moons-and-other-planetary-water-lagoons
#13
Steven A Benner
To the astrobiologist, Enceladus offers easy access to a potential subsurface biosphere via the intermediacy of a plume of water emerging directly into space. A direct question follows: If we were to collect a sample of this plume, what in that sample, through its presence or its absence, would suggest the presence and/or absence of life in this exotic locale? This question is, of course, relevant for life detection in any aqueous lagoon that we might be able to sample. This manuscript reviews physical chemical constraints that must be met by a genetic polymer for it to support Darwinism, a process believed to be required for a chemical system to generate properties that we value in biology...
June 30, 2017: Astrobiology
https://www.readbyqxmd.com/read/28664982/host-specific-associations-affect-the-microbiome-of-philornis-downsi-an-introduced-parasite-to-the-gal%C3%A3-pagos-islands
#14
Michael Ben-Yosef, Doron S Y Zaada, Rachael Y Dudaniec, Zohar Pasternak, Edouard Jurkevitch, Renee J Smith, Charlotte E Causton, M Piedad Lincango, Shanan S Tobe, James G Mitchell, Sonia Kleindorfer, Boaz Yuval
The composition and diversity of bacteria forming the microbiome of parasitic organisms have implications for differential host pathogenicity and host-parasite co-evolutionary interactions. The microbiome of pathogens can therefore have consequences that are relevant for managing disease prevalence and impact in affected hosts. Here we investigate the microbiome of an invasive parasitic fly Philornis downsi, recently introduced to the Galápagos Islands, where it poses extinction threat to Darwin's finches and other land birds...
June 30, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28661325/upflow-anaerobic-sludge-blanket-reactor-codigestion-of-algae-and-acetate-to-produce-methane
#15
Yousef M Soboh, Darwin L Sorensen, Ronald C Sims
  Algae grown in wastewater treatment lagoons are a potentially important substrate for biofuel production. The feasibility of using upflow anaerobic sludge blanket (UASB) reactors in anaerobic digestion of algae to produce methane was investigated. A favorable carbon to nitrogen (C/N) weight ratio of 21/1 was determined in batch reactor experiments in which the ratio was adjusted by blending algal biomass with sodium acetate as a carbon source. This blend of algae and acetate was used in the feedstock applied to the UASB reactors...
November 1, 2016: Water Environment Research: a Research Publication of the Water Environment Federation
https://www.readbyqxmd.com/read/28659577/elitist-binary-wolf-search-algorithm-for-heuristic-feature-selection-in-high-dimensional-bioinformatics-datasets
#16
Jinyan Li, Simon Fong, Raymond K Wong, Richard Millham, Kelvin K L Wong
Due to the high-dimensional characteristics of dataset, we propose a new method based on the Wolf Search Algorithm (WSA) for optimising the feature selection problem. The proposed approach uses the natural strategy established by Charles Darwin; that is, 'It is not the strongest of the species that survives, but the most adaptable'. This means that in the evolution of a swarm, the elitists are motivated to quickly obtain more and better resources. The memory function helps the proposed method to avoid repeat searches for the worst position in order to enhance the effectiveness of the search, while the binary strategy simplifies the feature selection problem into a similar problem of function optimisation...
June 28, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28654082/a-mitogenomic-timetree-for-darwin-s-enigmatic-south-american-mammal-macrauchenia-patachonica
#17
Michael Westbury, Sina Baleka, Axel Barlow, Stefanie Hartmann, Johanna L A Paijmans, Alejandro Kramarz, Analía M Forasiepi, Mariano Bond, Javier N Gelfo, Marcelo A Reguero, Patricio López-Mendoza, Matias Taglioretti, Fernando Scaglia, Andrés Rinderknecht, Washington Jones, Francisco Mena, Guillaume Billet, Christian de Muizon, José Luis Aguilar, Ross D E MacPhee, Michael Hofreiter
The unusual mix of morphological traits displayed by extinct South American native ungulates (SANUs) confounded both Charles Darwin, who first discovered them, and Richard Owen, who tried to resolve their relationships. Here we report an almost complete mitochondrial genome for the litoptern Macrauchenia. Our dated phylogenetic tree places Macrauchenia as sister to Perissodactyla, but close to the radiation of major lineages within Laurasiatheria. This position is consistent with a divergence estimate of ∼66 Ma (95% credibility interval, 56...
June 27, 2017: Nature Communications
https://www.readbyqxmd.com/read/28651370/changes-in-visceral-adiposity-subcutaneous-adiposity-and-sex-hormones-in-the-diabetes-prevention-program
#18
Catherine Kim, Dana Dabelea, Rita R Kalyani, Costas A Christophi, George A Bray, Xavier Pi-Sunyer, Christine H Darwin, Swaytha Yalamanchi, Elizabeth Barrett-Connor, Sherita Hill Golden, Edward J Boyko
Context: The degree to which changes in visceral adipose tissue (VAT) and subcutaneous adipose tissue (SAT) relate to corresponding changes in plasma sex steroids is not known. Objective: We examined whether changes in VAT and SAT areas assessed by computed tomography were associated with changes in sex hormones (dehydroepiandrosterone [DHEAS], testosterone, estradiol, estrone, and sex hormone binding globulin [SHBG]) among Diabetes Prevention Program participants...
June 23, 2017: Journal of Clinical Endocrinology and Metabolism
https://www.readbyqxmd.com/read/28648264/position-of-the-academy-of-nutrition-and-dietetics-interprofessional-education-in-nutrition-as-an-essential-component-of-medical-education
#19
Lisa A Hark, Darwin Deen
It is the position of the Academy of Nutrition and Dietetics that registered dietitian nutritionists (RDNs) should play a significant role in educating medical students, residents, fellows, and physicians in practice. The more physicians learn about the effectiveness of nutrition for the prevention and treatment of noncommunicable diseases, the more likely they are to consult with RDNs and refer patients for medical nutrition therapy. The more interprofessional education that occurs between medical students, other health professional students, and RDNs, the more likely all health care professionals will understand and value the role of the RDN in improving the quality of care provided to patients...
July 2017: Journal of the Academy of Nutrition and Dietetics
https://www.readbyqxmd.com/read/28647464/data-against-a-common-assumption-xenogeneic-mouse-models-can-be-used-to-assay-suppression-of-immunity-by-human-mscs
#20
REVIEW
Darwin J Prockop, Joo Youn Oh, Ryang Hwa Lee
Much of what we know about immunology suggests that little is to be gained from experiments in which human cells are administered to immunocompetent mice. Multiple reports have demonstrated that this common assumption does not hold for experiments with human mesenchymal stem/stromal cells (hMSCs). The data demonstrate that hMSCs can suppress immune responses to a variety of stimuli in immunocompetent mice by a range of different mechanisms that are similar to those employed by mouse MSCs. Therefore, further experiments with hMSCs in mice will make it possible to generate preclinical data that will improve both the efficacy and safety of the clinical trials with the cells that are now in progress...
June 21, 2017: Molecular Therapy: the Journal of the American Society of Gene Therapy
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