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https://www.readbyqxmd.com/read/29423469/a-novel-fluorescent-probe-based-on-biphenyl-and-rhodamine-for-multi-metal-ion-recognition-and-its-application
#1
Xu Tang, Yun Wang, Juan Han, Liang Ni, Huiqin Zhang, Cheng Li, Jing Li, Yue Qiu
At present, the design of multi ion sensing receptors is a new area of research due to their potential application in the recognition of analytes. Herein, a novel fluorescent probe for the detection of multi metal ions was designed and synthesized based on the fluorophores of biphenyl and rhodamine. Probe 1 exhibits multiple fluorescence responses to various metal ions (Zn2+, Al3+, Cr3+ and Fe3+) and is accompanied by different optical signal outputs. Moreover, the interference between the target ions can also be effectively solved by the introduction of probe 2 and the addition of the corresponding anions...
February 9, 2018: Dalton Transactions: An International Journal of Inorganic Chemistry
https://www.readbyqxmd.com/read/29414487/following-the-moving-and-changing-attachments-and-assemblages-of-addiction-applying-the-actor-network-approach-to-autobiographies
#2
Jukka Törrönen, Christoffer Tigerstedt
The article applies actor network theory (ANT) to autobiographical data on alcohol dependence to explore what ANT can offer to the analysis of 'addiction stories'. By defining 'addiction' as a relational achievement, as the effect of elements acting together as a configuration of human and non-human actors, the article demonstrates how the moving and changing attachments of addiction can be dynamically analyzed with concepts of 'assemblage', 'mediator', 'tendency', 'translation', 'trajectory', 'immutable mobile', 'fluid' and 'bush fire'...
January 30, 2018: International Journal on Drug Policy
https://www.readbyqxmd.com/read/29402966/tracking-hidden-organic-carbon-in-rocks-using-chemometrics-and-hyperspectral-imaging
#3
Céline Pisapia, Frédéric Jamme, Ludovic Duponchel, Bénédicte Ménez
Finding traces of life or organic components of prebiotic interest in the rock record is an appealing goal for numerous fields in Earth and space sciences. However, this is often hampered by the scarceness and highly heterogeneous distribution of organic compounds within rocks. We assess here an innovative analytical strategy combining Synchrotron radiation-based Fourier-Transform Infrared microspectroscopy (S-FTIR) and multivariate analysis techniques to track and characterize organic compounds at the pore level in complex oceanic rocks...
February 5, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29352028/the-mysteries-of-remote-memory
#4
REVIEW
Zimbul Albo, Johannes Gräff
Long-lasting memories form the basis of our identity as individuals and lie central in shaping future behaviours that guide survival. Surprisingly, however, our current knowledge of how such memories are stored in the brain and retrieved, as well as the dynamics of the circuits involved, remains scarce despite seminal technical and experimental breakthroughs in recent years. Traditionally, it has been proposed that, over time, information initially learnt in the hippocampus is stored in distributed cortical networks...
March 19, 2018: Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences
https://www.readbyqxmd.com/read/28942205/the-unintended-consequences-of-community-verifications-for-performance-based-financing-in-burkina-faso
#5
Anne-Marie Turcotte-Tremblay, Idriss Ali Gali-Gali, Manuela De Allegri, Valéry Ridde
Performance-based financing (PBF) is being widely implemented to improve healthcare services in Africa. An essential component of PBF involves conducting community verifications, wherein investigators from local associations attempt to trace samples of patients. Community surveys are administered to patients to verify whether healthcare workers reported fictitious services to increase their revenue. At the same time, client satisfaction surveys are administered to assess whether patients are satisfied with the services received...
September 8, 2017: Social Science & Medicine
https://www.readbyqxmd.com/read/28798742/preservation-and-significance-of-extracellular-dna-in-ferruginous-sediments-from-lake-towuti-indonesia
#6
Aurèle Vuillemin, Fabian Horn, Mashal Alawi, Cynthia Henny, Dirk Wagner, Sean A Crowe, Jens Kallmeyer
Extracellular DNA is ubiquitous in soil and sediment and constitutes a dominant fraction of environmental DNA in aquatic systems. In theory, extracellular DNA is composed of genomic elements persisting at different degrees of preservation produced by processes occurring on land, in the water column and sediment. Extracellular DNA can be taken up as a nutrient source, excreted or degraded by microorganisms, or adsorbed onto mineral matrices, thus potentially preserving information from past environments. To test whether extracellular DNA records lacustrine conditions, we sequentially extracted extracellular and intracellular DNA from anoxic sediments of ferruginous Lake Towuti, Indonesia...
2017: Frontiers in Microbiology
https://www.readbyqxmd.com/read/28582685/meaningful-questions-the-acquisition-of-auxiliary-inversion-in-a-connectionist-model-of-sentence-production
#7
Hartmut Fitz, Franklin Chang
Nativist theories have argued that language involves syntactic principles which are unlearnable from the input children receive. A paradigm case of these innate principles is the structure dependence of auxiliary inversion in complex polar questions (Chomsky, 1968, 1975, 1980). Computational approaches have focused on the properties of the input in explaining how children acquire these questions. In contrast, we argue that messages are structured in a way that supports structure dependence in syntax. We demonstrate this approach within a connectionist model of sentence production (Chang, 2009) which learned to generate a range of complex polar questions from a structured message without positive exemplars in the input...
September 2017: Cognition
https://www.readbyqxmd.com/read/28548457/on-the-research-of-time-past-the-hunt-for-the-substrate-of-memory
#8
REVIEW
Bridget N Queenan, Tomás J Ryan, Michael S Gazzaniga, Charles R Gallistel
The search for memory is one of the oldest quests in written human history. For at least two millennia, we have tried to understand how we learn and remember. We have gradually converged on the brain and looked inside it to find the basis of knowledge, the trace of memory. The search for memory has been conducted on multiple levels, from the organ to the cell to the synapse, and has been distributed across disciplines with less chronological or intellectual overlap than one might hope. Frequently, the study of the mind and its memories has been severely restricted by technological or philosophical limitations...
May 2017: Annals of the New York Academy of Sciences
https://www.readbyqxmd.com/read/28508537/superorganismality-and-caste-differentiation-as-points-of-no-return-how-the-major-evolutionary-transitions-were-lost-in-translation
#9
Jacobus J Boomsma, Richard Gawne
More than a century ago, William Morton Wheeler proposed that social insect colonies can be regarded as superorganisms when they have morphologically differentiated reproductive and nursing castes that are analogous to the metazoan germ-line and soma. Following the rise of sociobiology in the 1970s, Wheeler's insights were largely neglected, and we were left with multiple new superorganism concepts that are mutually inconsistent and uninformative on how superorganismality originated. These difficulties can be traced to the broadened sociobiological concept of eusociality, which denies that physical queen-worker caste differentiation is a universal hallmark of superorganismal colonies...
May 15, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28197858/mapping-biological-transmission-an-empirical-dynamical-and-evolutionary-approach
#10
Francesca Merlin, Livio Riboli-Sasco
The current debate over extending inheritance and its evolutionary impact has focused on adding new categories of non-genetic factors to the classical transmission of DNA, and on trying to redefine inheritance. Transmitted factors have been mainly characterized by their directions of transmission (vertical, horizontal, or both) and the way they store variations. In this paper, we leave aside the issue of defining inheritance. We rather try to build an evolutionary conceptual framework that allows for tracing most, if not all forms of transmission and makes sense of their different tempos and modes...
June 2017: Acta Biotheoretica
https://www.readbyqxmd.com/read/28029730/historical-foundations-and-future-directions-in-macrosystems-ecology
#11
Kevin C Rose, Rose A Graves, Winslow D Hansen, Brian J Harvey, Jiangxiao Qiu, Stephen A Wood, Carly Ziter, Monica G Turner
Macrosystems ecology is an effort to understand ecological processes and interactions at the broadest spatial scales and has potential to help solve globally important social and ecological challenges. It is important to understand the intellectual legacies underpinning macrosystems ecology: How the subdiscipline fits within, builds upon, differs from and extends previous theories. We trace the rise of macrosystems ecology with respect to preceding theories and present a new hypothesis that integrates the multiple components of macrosystems theory...
February 2017: Ecology Letters
https://www.readbyqxmd.com/read/27965654/the-neuro-endocrinological-role-of-microbial-glutamate-and-gaba-signaling
#12
REVIEW
Roberto Mazzoli, Enrica Pessione
Gut microbiota provides the host with multiple functions (e.g., by contributing to food digestion, vitamin supplementation, and defense against pathogenic strains) and interacts with the host organism through both direct contact (e.g., through surface antigens) and soluble molecules, which are produced by the microbial metabolism. The existence of the so-called gut-brain axis of bi-directional communication between the gastrointestinal tract and the central nervous system (CNS) also supports a communication pathway between the gut microbiota and neural circuits of the host, including the CNS...
2016: Frontiers in Microbiology
https://www.readbyqxmd.com/read/27802382/locating-the-proton-in-nicotinamide-protomers-via-low-resolution-uv-action-spectroscopy-of-electrosprayed-solutions
#13
Edward Matthews, Caroline E H Dessent
Even in relatively simple molecules, the sites of protonation or deprotonation formed upon electrospray ionization can be controversial. This situation means that it is important to develop new approaches for identifying "protomers" and "deprotomers". In this study, we demonstrate that routine, low-resolution UV laser photodissociation spectroscopy can be applied to identify the gaseous protomers of nicotinamide formed upon electrospray. Nicotinamide is an important biological molecule that possesses multiple protonation sites associated with its pyridine and amide groups...
November 23, 2016: Journal of Physical Chemistry. A
https://www.readbyqxmd.com/read/27782207/collective-influence-of-multiple-spreaders-evaluated-by-tracing-real-information-flow-in-large-scale-social-networks
#14
Xian Teng, Sen Pei, Flaviano Morone, Hernán A Makse
Identifying the most influential spreaders that maximize information flow is a central question in network theory. Recently, a scalable method called "Collective Influence (CI)" has been put forward through collective influence maximization. In contrast to heuristic methods evaluating nodes' significance separately, CI method inspects the collective influence of multiple spreaders. Despite that CI applies to the influence maximization problem in percolation model, it is still important to examine its efficacy in realistic information spreading...
October 26, 2016: Scientific Reports
https://www.readbyqxmd.com/read/27576486/acetonitrile-ion-suppression-in-atmospheric-pressure-ionization-mass-spectrometry
#15
Kevin Colizza, Keira E Mahoney, Alexander V Yevdokimov, James L Smith, Jimmie C Oxley
Efforts to analyze trace levels of cyclic peroxides by liquid chromatography/mass spectrometry gave evidence that acetonitrile suppressed ion formation. Further investigations extended this discovery to ketones, linear peroxides, esters, and possibly many other types of compounds, including triazole and menadione. Direct ionization suppression caused by acetonitrile was observed for multiple adduct types in both electrospray ionization and atmospheric pressure chemical ionization. The addition of only 2% acetonitrile significantly decreased the sensitivity of analyte response...
November 2016: Journal of the American Society for Mass Spectrometry
https://www.readbyqxmd.com/read/27531360/active-engagement-in-a-web-based-tutorial-to-prevent-obesity-grounded-in-fuzzy-trace-theory-predicts-higher-knowledge-and-gist-comprehension
#16
Priscila G Brust-Renck, Valerie F Reyna, Evan A Wilhelms, Christopher R Wolfe, Colin L Widmer, Elizabeth M Cedillos-Whynott, A Kate Morant
We used Sharable Knowledge Objects (SKOs) to create an Intelligent Tutoring System (ITS) grounded in Fuzzy-Trace Theory to teach women about obesity prevention: GistFit, getting the gist of healthy eating and exercise. The theory predicts that reliance on gist mental representations (as opposed to verbatim) is more effective in reducing health risks and improving decision making. Technical information was translated into decision-relevant gist representations and gist principles (i.e., healthy values). The SKO was hypothesized to facilitate extracting these gist representations and principles by engaging women in dialogue, "understanding" their responses, and replying appropriately to prompt additional engagement...
August 2017: Behavior Research Methods
https://www.readbyqxmd.com/read/27442403/brain-topography-of-emf-induced-eeg-changes-in-restful-wakefulness-tracing-current-effects-targeting-future-prospects
#17
REVIEW
Biljana Gjoneska, Simona Markovska-Simoska, Hiie Hinrikus, Nada Pop-Jordanova, Jordan Pop-Jordanov
INTRODUCTION: Covering a handful of decades but spanning across two centuries, mobile phones announced the dawn of the technological revolution, standing at the forefront as its' most prominent symbol. Over the course of their sovereign dominance, human generations born with the birth of the mobile phone reached the age of maturity, while scientific community started reaching for experience-based perceptivity. AIM: The following review serves as a short-cut across a half-decade old research gap, and a clear-cut analysis on the cutting-edge knowledge of the EMF induced EEG changes...
2015: Prilozi (Makedonska Akademija Na Naukite i Umetnostite. Oddelenie za Medicinski Nauki)
https://www.readbyqxmd.com/read/27428966/comparison-of-three-non-imaging-angle-diversity-receivers-as-input-sensors-of-nodes-for-indoor-infrared-wireless-sensor-networks-theory-and-simulation
#18
Beatriz R Mendoza, Silvestre Rodríguez, Rafael Pérez-Jiménez, Alejandro Ayala, Oswaldo González
In general, the use of angle-diversity receivers makes it possible to reduce the impact of ambient light noise, path loss and multipath distortion, in part by exploiting the fact that they often receive the desired signal from different directions. Angle-diversity detection can be performed using a composite receiver with multiple detector elements looking in different directions. These are called non-imaging angle-diversity receivers. In this paper, a comparison of three non-imaging angle-diversity receivers as input sensors of nodes for an indoor infrared (IR) wireless sensor network is presented...
2016: Sensors
https://www.readbyqxmd.com/read/27248142/the-international-postal-network-and-other-global-flows-as-proxies-for-national-wellbeing
#19
Desislava Hristova, Alex Rutherford, Jose Anson, Miguel Luengo-Oroz, Cecilia Mascolo
The digital exhaust left by flows of physical and digital commodities provides a rich measure of the nature, strength and significance of relationships between countries in the global network. With this work, we examine how these traces and the network structure can reveal the socioeconomic profile of different countries. We take into account multiple international networks of physical and digital flows, including the previously unexplored international postal network. By measuring the position of each country in the Trade, Postal, Migration, International Flights, IP and Digital Communications networks, we are able to build proxies for a number of crucial socioeconomic indicators such as GDP per capita and the Human Development Index ranking along with twelve other indicators used as benchmarks of national well-being by the United Nations and other international organisations...
2016: PloS One
https://www.readbyqxmd.com/read/27241754/fluctuation-analysis-dissecting-transcriptional-kinetics-with-signal-theory
#20
A Coulon, D R Larson
Recent live-cell microscopy techniques now allow the visualization in multiple colors of RNAs as they are transcribed on genes of interest. Following the number of nascent RNAs over time at a single locus reveals complex fluctuations originating from the underlying transcriptional kinetics. We present here a technique based on concepts from signal theory-called fluctuation analysis-to analyze and interpret multicolor transcriptional time traces and extract the temporal signatures of the underlying mechanisms...
2016: Methods in Enzymology
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