To see the other types of publications on this topic, follow the link: Dynamic speciation.

Journal articles on the topic 'Dynamic speciation'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles

Select a source type:

Consult the top 50 journal articles for your research on the topic 'Dynamic speciation.'

Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.

You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.

Browse journal articles on a wide variety of disciplines and organise your bibliography correctly.

1

AGUILÉE, R., A. LAMBERT, and D. CLAESSEN. "Ecological speciation in dynamic landscapes." Journal of Evolutionary Biology 24, no. 12 (2011): 2663–77. http://dx.doi.org/10.1111/j.1420-9101.2011.02392.x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
2

Ackermann, J., D. Vetterlein, H. Tanneberg, H. U. Neue, J. Mattusch, and R. Jahn. "Speciation of Arsenic under Dynamic Conditions." Engineering in Life Sciences 8, no. 6 (2008): 589–97. http://dx.doi.org/10.1002/elsc.200800012.

Full text
APA, Harvard, Vancouver, ISO, and other styles
3

Michałowska-Kaczmarczyk, Anna Maria, Marcin Toporek, and Tadeusz Michałowski. "Speciation Diagrams in Dynamic Iodide + Dichromate System." Electrochimica Acta 155 (February 2015): 217–27. http://dx.doi.org/10.1016/j.electacta.2015.01.003.

Full text
APA, Harvard, Vancouver, ISO, and other styles
4

Pinheiro, Jose Paulo, Luciana S. Rocha, Danielle Goveia, and Raewyn M. Town. "Scanned stripping chronopotentiometry at bismuth film rotating disc electrodes: a method for quantitative dynamic metal speciation." Environmental Chemistry 11, no. 2 (2014): 150. http://dx.doi.org/10.1071/en13147.

Full text
Abstract:
Environmental context Electroanalytical methods have found wide application in trace metal speciation analysis in environmental systems. The need to find functional alternatives to mercury electrodes for in situ speciation studies has encouraged the use of bismuth as a solid-state electrode substrate. We demonstrate the utility of bismuth electrodes for quantitative dynamic speciation analysis. Abstract Bismuth film electrodes are employed for dynamic metal speciation analysis of PbII complexes by stripping chronopotentiometry at scanned deposition potential (SSCP). Their performance is found
APA, Harvard, Vancouver, ISO, and other styles
5

Templeton, Douglas M., Freek Ariese, Rita Cornelis, et al. "Guidelines for terms related to chemical speciation and fractionation of elements. Definitions, structural aspects, and methodological approaches (IUPAC Recommendations 2000)." Pure and Applied Chemistry 72, no. 8 (2000): 1453–70. http://dx.doi.org/10.1351/pac200072081453.

Full text
Abstract:
This paper presents definitions of concepts related to speciation of elements, more particularly speciation analysis and chemical species. Fractionation is distinguished from speciation analysis, and a general outline of fractionation procedures is given. We propose a categorization of species according to isotopic composition of the element, its oxidation and electronic states, and its complex and molecular structure. Examples are given of methodological approaches used for speciation analysis. A synopsis of the methodology of dynamic speciation analysis is also presented.
APA, Harvard, Vancouver, ISO, and other styles
6

Marang, Laura, Pascal Reiller, Monique Pepe, and Marc F. Benedetti. "Donnan Membrane Approach: From Equilibrium to Dynamic Speciation." Environmental Science & Technology 40, no. 17 (2006): 5496–501. http://dx.doi.org/10.1021/es060608t.

Full text
APA, Harvard, Vancouver, ISO, and other styles
7

Zheng, G. D., T. B. Chen, D. Gao, and W. Luo. "Dynamic of lead speciation in sewage sludge composting." Water Science and Technology 50, no. 9 (2004): 75–82. http://dx.doi.org/10.2166/wst.2004.0539.

Full text
Abstract:
A large-scale sewage sludge composting experiment was conducted to develop an understanding of changes that occur to Pb chemical speciation, distribution and bio-availability during the course of composting. The four-stage Tessier sequential extraction method was employed to investigate the dynamics of heavy metal Pb speciation (exchangeable, bound to carbonates, bound to Fe-Mn oxides, bound to organic matter and sulphides, residual) during the course of sewage sludge composting. The concentrations of the total Pb and the five Pb fractions concentrations were increased during the whole stage o
APA, Harvard, Vancouver, ISO, and other styles
8

Ichimura, Takumi, Hiroshi Inoue, Akira Hara, Tetsuyuki Takahama, and Kenneth J. Mackin. "A Proposal of Memory and Prediction Based Genetic Algorithm Using Speciation in Dynamic Multimodal Function Optimization." Journal of Advanced Computational Intelligence and Intelligent Informatics 15, no. 8 (2011): 1082–94. http://dx.doi.org/10.20965/jaciii.2011.p1082.

Full text
Abstract:
It is a difficult problem for evolutionary algorithms to search an optimal solution in multimodal functions with dynamic environments, where individuals searchmore than one optimum and their fitness values change over time. In this paper, we propose a method of Memory and Prediction Based Genetic Algorithm Using Speciation. This method is extended with a case based memory and a meta learner for precise prediction of environmental change. Especially, the individuals in a memory consist of 4 kinds of predictors and they can adjust to the change of dynamic environment adaptively. Speciation has s
APA, Harvard, Vancouver, ISO, and other styles
9

Town, Raewyn M., and Herman P. van Leeuwen. "Dynamic features of speciation analysis by adsorptive stripping techniques." Environmental Chemistry 7, no. 3 (2010): 242. http://dx.doi.org/10.1071/en10027.

Full text
Abstract:
Environmental context.The environmental fate and bioavailability of metal ions in natural waters is determined by their thermodynamic stability and kinetic features, both of which are distributed. Competing ligand exchange – adsorptive stripping (CLE-AdS) is a technique that measures a certain portion of these complexes as determined by the stability of the selected competing ligand and the dynamic features of the sample complexes that remain following ligand exchange. Exploitation of CLE-AdS to determine a spectrum of sample complexes requires insight into its thermodynamic and kinetic window
APA, Harvard, Vancouver, ISO, and other styles
10

Parsons, Chris T., Fereidoun Rezanezhad, David W. O'Connell, and Philippe Van Cappellen. "Sediment phosphorus speciation and mobility under dynamic redox conditions." Biogeosciences 14, no. 14 (2017): 3585–602. http://dx.doi.org/10.5194/bg-14-3585-2017.

Full text
Abstract:
Abstract. Anthropogenic nutrient enrichment has caused phosphorus (P) accumulation in many freshwater sediments, raising concerns that internal loading from legacy P may delay the recovery of aquatic ecosystems suffering from eutrophication. Benthic recycling of P strongly depends on the redox regime within surficial sediment. In many shallow environments, redox conditions tend to be highly dynamic as a result of, among others, bioturbation by macrofauna, root activity, sediment resuspension and seasonal variations in bottom-water oxygen (O2) concentrations. To gain insight into the mobility a
APA, Harvard, Vancouver, ISO, and other styles
11

Puy, Jaume, and Josep Galceran. "Theoretical aspects of dynamic metal speciation with electrochemical techniques." Current Opinion in Electrochemistry 1, no. 1 (2017): 80–87. http://dx.doi.org/10.1016/j.coelec.2017.01.001.

Full text
APA, Harvard, Vancouver, ISO, and other styles
12

Arriaga-Jiménez, Alfonsina, Bert Kohlmann, Lorenzo Vázquez-Selem, Yhenner Umaña, and Matthias Rös. "Past and future sky-island dynamics of tropical mountains: A model for two Geotrupes (Coleoptera: Geotrupidae) species in Oaxaca, Mexico." Holocene 30, no. 10 (2020): 1462–70. http://dx.doi.org/10.1177/0959683620932977.

Full text
Abstract:
Recent collecting and taxonomic studies of dung beetles of the genus Geotrupes Latreille (Coleoptera: Geotrupidae) in the mountains of Oaxaca have evidenced the existence of a vicariant speciation pattern, where one species occupies the northern mountain system and the other one the southern mountain range. A study of this possible vicariant speciation mechanism is presented using a paleobiogeographic mapping analysis of both Geotrupes species distribution during Late Quaternary glaciation events. Based on these paleomaps a possible speciation mechanism (vicariant speciation) is suggested, in
APA, Harvard, Vancouver, ISO, and other styles
13

Domingos, Rute F., Rócio Lopez, and José P. Pinheiro. "Trace metal dynamic speciation studied by scanned stripping chronopotentiometry (SSCP)." Environmental Chemistry 5, no. 1 (2008): 24. http://dx.doi.org/10.1071/en07088.

Full text
Abstract:
Environmental context. Natural aquatic systems are subject to changing conditions and practically never reach chemical equilibrium. Therefore, a quantitative understanding of the interaction of the trace metals with heterogeneous samples and their kinetic characteristics requires the dynamic characterisation of trace metal speciation. We show that scanned stripping chronopotentiometry (SSCP) is able to discriminate the dynamic nature of the complexes, although it still overestimates the average stability constants obtained from the SSCP wave characteristics using the Freundlich isotherm to acc
APA, Harvard, Vancouver, ISO, and other styles
14

Lenormand, Thomas. "From Local Adaptation to Speciation: Specialization and Reinforcement." International Journal of Ecology 2012 (2012): 1–11. http://dx.doi.org/10.1155/2012/508458.

Full text
Abstract:
Local adaptation is the first step in the process of ecological speciation. It is, however, an unstable and dynamic situation. It can be strengthened by the occurrence of alleles more specialized to the different habitats or vanish if generalist alleles arise by mutations and increase in frequency. This process can have complicated dynamics as specialist alleles may be much more common and may maintain local adaptation for a long time. Thus, even in the absence of an absolute fitness tradeoff between habitats, local adaptation may persist a long time before vanishing. Furthermore, several feed
APA, Harvard, Vancouver, ISO, and other styles
15

van Leeuwen, Herman P., Raewyn M. Town, Jacques Buffle, et al. "Dynamic Speciation Analysis and Bioavailability of Metals in Aquatic Systems." Environmental Science & Technology 39, no. 22 (2005): 8545–56. http://dx.doi.org/10.1021/es050404x.

Full text
APA, Harvard, Vancouver, ISO, and other styles
16

Town, Raewyn M., Parthasarathi Chakraborty, and Herman P. van Leeuwen. "Dynamic DGT speciation analysis and applicability to natural heterogeneous complexes." Environmental Chemistry 6, no. 2 (2009): 170. http://dx.doi.org/10.1071/en08091.

Full text
Abstract:
Environmental context. The environmental fate and bioavailability of metal ions in natural waters is determined by their thermodynamic stability and kinetic features, both of which are distributed and depend on the metal ion loading of the system. Diffusive gradients in thin film (DGT) is a dynamic technique for metal speciation analysis that measures a certain portion of these complexes as determined by its operational timescale. Reliable interpretation of data furnished by DGT necessitates characterisation of its features for the particular case of heterogeneous complexes. Abstract. Owing to
APA, Harvard, Vancouver, ISO, and other styles
17

Wilke, Thomas, Torsten Hauffe, Elena Jovanovska, et al. "Deep drilling reveals massive shifts in evolutionary dynamics after formation of ancient ecosystem." Science Advances 6, no. 40 (2020): eabb2943. http://dx.doi.org/10.1126/sciadv.abb2943.

Full text
Abstract:
The scarcity of high-resolution empirical data directly tracking diversity over time limits our understanding of speciation and extinction dynamics and the drivers of rate changes. Here, we analyze a continuous species-level fossil record of endemic diatoms from ancient Lake Ohrid, along with environmental and climate indicator time series since lake formation 1.36 million years (Ma) ago. We show that speciation and extinction rates nearly simultaneously decreased in the environmentally dynamic phase after ecosystem formation and stabilized after deep-water conditions established in Lake Ohrid
APA, Harvard, Vancouver, ISO, and other styles
18

Chen, Yung-Chun, and Shiuh-Jen Jiang. "Simultaneous speciation of arsenic and mercury in fish by high-performance liquid chromatography inductively coupled plasma mass spectrometry." Journal of Analytical Atomic Spectrometry 36, no. 5 (2021): 938–45. http://dx.doi.org/10.1039/d0ja00523a.

Full text
APA, Harvard, Vancouver, ISO, and other styles
19

Bartlett, Stuart A., Michelle L. Hamilton, and John Evans. "Dynamic structure elucidation of chemical reactivity by laser pulses and X-ray probes." Dalton Transactions 44, no. 14 (2015): 6313–19. http://dx.doi.org/10.1039/c5dt00210a.

Full text
Abstract:
Inelastic X-ray scattering techniques enhance chemical speciation by X-ray absorption fine structure (XAFS) spectroscopy and open up application of X-ray free electron lasers to observe chemical transformations.
APA, Harvard, Vancouver, ISO, and other styles
20

VINCENT, THOMAS L. "THE G-FUNCTION METHOD FOR ANALYZING DARWINIAN DYNAMICS." International Game Theory Review 06, no. 01 (2004): 69–90. http://dx.doi.org/10.1142/s0219198904000083.

Full text
Abstract:
Darwinian dynamics refers to the dynamical processes underlying natural selection that drives evolution. We are interested in the evolution of strategies used by biological entities. There are two dynamical processes involved, population dynamics (relationship between population density and the agents affecting density) and strategy dynamics (relationship between strategy values and the agents affecting these values). Darwinian dynamics is a total dynamic obtained through the coupling of these two processes, the modeling of which, involves dynamical systems, optimization, stability, and game t
APA, Harvard, Vancouver, ISO, and other styles
21

Silva, Sofia Marques, A. Townsend Peterson, Lincoln Carneiro, et al. "A dynamic continental moisture gradient drove Amazonian bird diversification." Science Advances 5, no. 7 (2019): eaat5752. http://dx.doi.org/10.1126/sciadv.aat5752.

Full text
Abstract:
The Amazon is the primary source of Neotropical diversity and a nexus for discussions on processes that drive biotic diversification. Biogeographers have focused on the roles of rivers and Pleistocene climate change in explaining high rates of speciation. We combine phylogeographic and niche-based paleodistributional projections for 23 upland terra firme forest bird lineages from across the Amazon to derive a new model of regional biological diversification. We found that climate-driven refugial dynamics interact with dynamic riverine barriers to produce a dominant pattern: Older lineages in t
APA, Harvard, Vancouver, ISO, and other styles
22

Zheng, An-Qi, Chen-Xi Zhao, Xiao-Juan Wang, Yang Shu, and Jian-Hua Wang. "Simultaneous detection and speciation of mono- and di-valent copper ions with a dual-channel fluorescent nanoprobe." Chemical Communications 56, no. 97 (2020): 15337–40. http://dx.doi.org/10.1039/d0cc06750d.

Full text
Abstract:
A dual channel fluorescent nanoprobe is developed for simultaneous detection and speciation of mono- and di-valent copper ions. It is demonstrated by exploring the dynamic decomposition/degradation process of copper nanoparticles.
APA, Harvard, Vancouver, ISO, and other styles
23

Reeve, James, Daniel Ortiz-Barrientos, and Jan Engelstädter. "The evolution of recombination rates in finite populations during ecological speciation." Proceedings of the Royal Society B: Biological Sciences 283, no. 1841 (2016): 20161243. http://dx.doi.org/10.1098/rspb.2016.1243.

Full text
Abstract:
Recombination can impede ecological speciation with gene flow by mixing locally adapted genotypes with maladapted migrant genotypes from a divergent population. In such a scenario, suppression of recombination can be selectively favoured. However, in finite populations evolving under the influence of random genetic drift, recombination can also facilitate adaptation by reducing Hill–Robertson interference between loci under selection. In this case, increased recombination rates can be favoured. Although these two major effects on recombination have been studied individually, their joint effect
APA, Harvard, Vancouver, ISO, and other styles
24

Mullins, Alexandria G., Lauren E. St. Louis, and Marcey L. Waters. "Using changes in speciation in a dynamic combinatorial library as a fingerprint to differentiate the methylation states of arginine." Chemical Communications 56, no. 28 (2020): 3947–50. http://dx.doi.org/10.1039/d0cc00415d.

Full text
Abstract:
A dynamic combinatorial library was shown to provide a direct method of sensing methylated arginine and lysine due to differences in speciation. This provides the first sensor array for all the methylation states of arginine.
APA, Harvard, Vancouver, ISO, and other styles
25

Domingos, Rute F., Rócio Lopez, and José P. Pinheiro. "Corrigendum to: Trace metal dynamic speciation studied by scanned stripping chronopotentiometry (SSCP)." Environmental Chemistry 5, no. 2 (2008): 169. http://dx.doi.org/10.1071/en07088_co.

Full text
Abstract:
Environmental context. Natural aquatic systems are subject to changing conditions and practically never reach chemical equilibrium. Therefore, a quantitative understanding of the interaction of the trace metals with heterogeneous samples and their kinetic characteristics requires the dynamic characterisation of trace metal speciation. We show that scanned stripping chronopotentiometry (SSCP) is able to discriminate the dynamic nature of the complexes, although it still overestimates the average stability constants obtained from the SSCP wave characteristics using the Freundlich isotherm to acc
APA, Harvard, Vancouver, ISO, and other styles
26

Liow, Lee Hsiang, and John A. Finarelli. "A dynamic global equilibrium in carnivoran diversification over 20 million years." Proceedings of the Royal Society B: Biological Sciences 281, no. 1778 (2014): 20132312. http://dx.doi.org/10.1098/rspb.2013.2312.

Full text
Abstract:
The ecological and evolutionary processes leading to present-day biological diversity can be inferred by reconstructing the phylogeny of living organisms, and then modelling potential processes that could have produced this genealogy. A more direct approach is to estimate past processes from the fossil record. The Carnivora (Mammalia) has both substantial extant species richness and a rich fossil record. We compiled species-level data for over 10 000 fossil occurrences of nearly 1400 carnivoran species. Using this compilation, we estimated extinction, speciation and net diversification for car
APA, Harvard, Vancouver, ISO, and other styles
27

Higham, Timothy E., Sean M. Rogers, R. Brian Langerhans, et al. "Speciation through the lens of biomechanics: locomotion, prey capture and reproductive isolation." Proceedings of the Royal Society B: Biological Sciences 283, no. 1838 (2016): 20161294. http://dx.doi.org/10.1098/rspb.2016.1294.

Full text
Abstract:
Speciation is a multifaceted process that involves numerous aspects of the biological sciences and occurs for multiple reasons. Ecology plays a major role, including both abiotic and biotic factors. Whether populations experience similar or divergent ecological environments, they often adapt to local conditions through divergence in biomechanical traits. We investigate the role of biomechanics in speciation using fish predator–prey interactions, a primary driver of fitness for both predators and prey. We highlight specific groups of fishes, or specific species, that have been particularly valu
APA, Harvard, Vancouver, ISO, and other styles
28

Zhang, Hao, and William Davison. "Use of diffusive gradients in thin-films for studies of chemical speciation and bioavailability." Environmental Chemistry 12, no. 2 (2015): 85. http://dx.doi.org/10.1071/en14105.

Full text
Abstract:
Environmental context The health of aquatic organisms depends on the distribution of the dissolved forms of chemical components (speciation) and their rates of interaction (dynamics). This review documents and explains progress made using the dynamic technique of diffusive gradients in thin-films (DGT) to meet these challenges of measuring directly chemical speciation and associated dynamics in natural waters. The relevance of these measurements to uptake by biota of chemical forms in soils, sediments and water is discussed with reference to this expanding literature. Abstract This review asse
APA, Harvard, Vancouver, ISO, and other styles
29

van Leeuwen, Herman P., Kevin J. Wilkinson, and Raewyn M. Town. "A tribute to Jacques Buffle: founding father of dynamic metal speciation analysis." Environmental Science & Technology 43, no. 19 (2009): 7157–58. http://dx.doi.org/10.1021/es901604y.

Full text
APA, Harvard, Vancouver, ISO, and other styles
30

Sigg, Laura, Frank Black, Jacques Buffle, et al. "Comparison of Analytical Techniques for Dynamic Trace Metal Speciation in Natural Freshwaters." Environmental Science & Technology 40, no. 6 (2006): 1934–41. http://dx.doi.org/10.1021/es051245k.

Full text
APA, Harvard, Vancouver, ISO, and other styles
31

Mota, A. M., J. P. Pinheiro, and M. L. Simões Gonçalves. "Electrochemical Methods for Speciation of Trace Elements in Marine Waters. Dynamic Aspects." Journal of Physical Chemistry A 116, no. 25 (2012): 6433–42. http://dx.doi.org/10.1021/jp2124636.

Full text
APA, Harvard, Vancouver, ISO, and other styles
32

Zhao, Ji, Jun Sun, and Vasile Palade. "Tracking Multiple Optima in Dynamic Environments by Quantum-Behavior Particle Swarm Using Speciation." International Journal of Swarm Intelligence Research 3, no. 1 (2012): 55–76. http://dx.doi.org/10.4018/jsir.2012010104.

Full text
Abstract:
This paper presents an improved Quantum-behaved Particle Swarm Optimization, namely the Species-Based QPSO (SQPSO), using the notion of species for solving optimization problems with multiple peaks from the complex dynamic environments. In the proposed SQPSO algorithm, the swarm population is divided into species (subpopulations) based on their similarities. Each species is grouped around a dominating particle called species seed. Over successive iterations, species are able to simultaneously optimize towards multiple optima by using the QPSO procedure, so that each of the peaks can be definit
APA, Harvard, Vancouver, ISO, and other styles
33

Kolis, Kayla M., and Bruce S. Lieberman. "Using GIS to examine biogeographic and macroevolutionary patterns in some late Paleozoic cephalopods from the North American Midcontinent Sea." PeerJ 7 (May 13, 2019): e6910. http://dx.doi.org/10.7717/peerj.6910.

Full text
Abstract:
Geographic range is an important macroevolutionary parameter frequently considered in paleontological studies as species’ distributions and range sizes are determined by a variety of biotic and abiotic factors well known to affect the differential birth and death of species. Thus, considering how distributions and range sizes fluctuate over time can provide important insight into evolutionary dynamics. This study uses Geographic Information Systems (GIS) and analyses of evolutionary rates to examine how in some species within the Cephalopoda, an important pelagic clade, geographic range size a
APA, Harvard, Vancouver, ISO, and other styles
34

Parrott, D., and Xiaodong Li. "Locating and tracking multiple dynamic optima by a particle swarm model using speciation." IEEE Transactions on Evolutionary Computation 10, no. 4 (2006): 440–58. http://dx.doi.org/10.1109/tevc.2005.859468.

Full text
APA, Harvard, Vancouver, ISO, and other styles
35

Bhavsar, Satyendra P., Miriam L. Diamond, Nilima Gandhi, and Joel Nilsen. "DYNAMIC COUPLED METAL TRANSPORT–SPECIATION MODEL: APPLICATION TO ASSESS A ZINC-CONTAMINATED LAKE." Environmental Toxicology and Chemistry 23, no. 10 (2004): 2410. http://dx.doi.org/10.1897/03-619.

Full text
APA, Harvard, Vancouver, ISO, and other styles
36

Winston, Max E., Daniel J. C. Kronauer, and Corrie S. Moreau. "Early and dynamic colonization of Central America drives speciation in Neotropical army ants." Molecular Ecology 26, no. 3 (2016): 859–70. http://dx.doi.org/10.1111/mec.13846.

Full text
APA, Harvard, Vancouver, ISO, and other styles
37

Crampton, James S., Roger A. Cooper, Michael Foote, and Peter M. Sadler. "Ephemeral species in the fossil record? Synchronous coupling of macroevolutionary dynamics in mid-Paleozoic zooplankton." Paleobiology 46, no. 1 (2020): 123–35. http://dx.doi.org/10.1017/pab.2020.3.

Full text
Abstract:
AbstractWe document a positive and strong correlation between speciation and extinction rates in the Paleozoic zooplankton graptoloid clade, between 481 and 419 Ma. This correlation has a magnitude of ~0.35–0.45 and manifests at a temporal resolution of <50 kyr and, for part of our data set, <25 kyr. It cannot be explained as an artifact of the method used to measure rates, sampling bias, bias resulting from construction of the time series, autocorrelation, underestimation of species durations, or undetected phyletic evolution. Correlations are approximately equal during the Ordovician a
APA, Harvard, Vancouver, ISO, and other styles
38

Wong, V., and G. Ho. "Metal speciation and leachability of heavy metals from Enersludge™ ash in concrete." Water Science and Technology 41, no. 8 (2000): 53–60. http://dx.doi.org/10.2166/wst.2000.0142.

Full text
Abstract:
The Oil From Sludge (Enersludge™) process converts sewage sludge into hydrocarbons, partially fixing heavy metals in the by-product ash. Research was carried out to investigate the speciation and leaching behaviour of heavy metals (cadmium, copper, chromium, nickel, lead and zinc) when using this ash product in concrete. This was achieved by conducting a sequential extraction procedure, a soluble fraction test and dynamic leach test. Sequentialextraction showed that heavy metals in the ash speciated mainly into a stable form. Leachable heavy metals were derived mainly from the concrete (contro
APA, Harvard, Vancouver, ISO, and other styles
39

Mousavi, Maral P. S., Ian L. Gunsolus, Carlos E. Pérez De Jesús, et al. "Dynamic silver speciation as studied with fluorous-phase ion-selective electrodes: Effect of natural organic matter on the toxicity and speciation of silver." Science of The Total Environment 537 (December 2015): 453–61. http://dx.doi.org/10.1016/j.scitotenv.2015.07.151.

Full text
APA, Harvard, Vancouver, ISO, and other styles
40

Connor, Nora, Johannes Sikorski, Alejandro P. Rooney, et al. "Ecology of Speciation in the Genus Bacillus." Applied and Environmental Microbiology 76, no. 5 (2010): 1349–58. http://dx.doi.org/10.1128/aem.01988-09.

Full text
Abstract:
ABSTRACT Microbial ecologists and systematists are challenged to discover the early ecological changes that drive the splitting of one bacterial population into two ecologically distinct populations. We have aimed to identify newly divergent lineages (“ecotypes”) bearing the dynamic properties attributed to species, with the rationale that discovering their ecological differences would reveal the ecological dimensions of speciation. To this end, we have sampled bacteria from the Bacillus subtilis-Bacillus licheniformis clade from sites differing in solar exposure and soil texture within a Deat
APA, Harvard, Vancouver, ISO, and other styles
41

Weppe, R., M. J. Orliac, G. Guinot, and F. L. Condamine. "Evolutionary drivers, morphological evolution and diversity dynamics of a surviving mammal clade: cainotherioids at the Eocene–Oligocene transition." Proceedings of the Royal Society B: Biological Sciences 288, no. 1952 (2021): 20210173. http://dx.doi.org/10.1098/rspb.2021.0173.

Full text
Abstract:
The Eocene–Oligocene transition (EOT) represents a period of global environmental changes particularly marked in Europe and coincides with a dramatic biotic turnover. Here, using an exceptional fossil preservation, we document and analyse the diversity dynamics of a mammal clade, Cainotherioidea (Artiodactyla), that survived the EOT and radiated rapidly immediately after. We infer their diversification history from Quercy Konzentrat–Lagerstätte (south-west France) at the species level using Bayesian birth–death models. We show that cainotherioid diversity fluctuated through time, with extincti
APA, Harvard, Vancouver, ISO, and other styles
42

HE, MINGFENG, and GUOJUN YU. ""UNIFIED" ECO-SYSTEM MODEL OF MACRO- AND MICROEVOLUTION BASED ENERGY." International Journal of Modern Physics C 17, no. 04 (2006): 581–90. http://dx.doi.org/10.1142/s0129183106008698.

Full text
Abstract:
The source-network, the dynamic trophic level and the energy are incorporated into a "unified" model that describes both micro- and macroevolutions within a single theoretical framework. This model describes the microevolution in details by accounting for the birth, ageing, and natural death of individual organisms as prey-predator interactions on a hierarchical dynamic food web. It also provides a natural description of random mutations and speciation of species as well as their extinctions. The distribution of lifetimes of species follows an approximate power law only over a limited regime,
APA, Harvard, Vancouver, ISO, and other styles
43

Flaxman, Samuel M., Jeffrey L. Feder, and Patrik Nosil. "GENETIC HITCHHIKING AND THE DYNAMIC BUILDUP OF GENOMIC DIVERGENCE DURING SPECIATION WITH GENE FLOW." Evolution 67, no. 9 (2013): 2577–91. http://dx.doi.org/10.1111/evo.12055.

Full text
APA, Harvard, Vancouver, ISO, and other styles
44

Deng, Libao, Yiran Wu, Su Guo, Lili Zhang, and Haili Sun. "Rose pattern for heliostat field optimization with a dynamic speciation‐based mutation differential evolution." International Journal of Energy Research 44, no. 3 (2019): 1951–70. http://dx.doi.org/10.1002/er.5048.

Full text
APA, Harvard, Vancouver, ISO, and other styles
45

Hsieh, Meng-Wei, Chen-Ling Liu, Jing-Huan Chen, and Shiuh-Jen Jiang. "Speciation analysis of arsenic and selenium compounds by CE-dynamic reaction cell-ICP-MS." ELECTROPHORESIS 31, no. 13 (2010): 2272–78. http://dx.doi.org/10.1002/elps.200900632.

Full text
APA, Harvard, Vancouver, ISO, and other styles
46

Peñalba, Joshua V., Leo Joseph, and Craig Moritz. "Current geography masks dynamic history of gene flow during speciation in northern Australian birds." Molecular Ecology 28, no. 3 (2019): 630–43. http://dx.doi.org/10.1111/mec.14978.

Full text
APA, Harvard, Vancouver, ISO, and other styles
47

Deng, Libao, Lili Zhang, Haili Sun, and Liyan Qiao. "DSM-DE: a differential evolution with dynamic speciation-based mutation for single-objective optimization." Memetic Computing 12, no. 1 (2019): 73–86. http://dx.doi.org/10.1007/s12293-019-00279-0.

Full text
APA, Harvard, Vancouver, ISO, and other styles
48

van Leeuwen, Herman P., and Stefan Jansen. "Dynamic aspects of metal speciation by competitive ligand exchange–adsorptive stripping voltammetry (CLE–AdSV)." Journal of Electroanalytical Chemistry 579, no. 2 (2005): 337–42. http://dx.doi.org/10.1016/j.jelechem.2005.03.006.

Full text
APA, Harvard, Vancouver, ISO, and other styles
49

Bradac, Philippe, Bettina Wagner, David Kistler, Jacqueline Traber, Renata Behra, and Laura Sigg. "Cadmium speciation and accumulation in periphyton in a small stream with dynamic concentration variations." Environmental Pollution 158, no. 3 (2010): 641–48. http://dx.doi.org/10.1016/j.envpol.2009.10.031.

Full text
APA, Harvard, Vancouver, ISO, and other styles
50

Etschmann, Barbara E., Erica Donner, Joël Brugger, et al. "Speciation mapping of environmental samples using XANES imaging." Environmental Chemistry 11, no. 3 (2014): 341. http://dx.doi.org/10.1071/en13189.

Full text
Abstract:
Environmental context Recently developed fast fluorescence detectors have opened the way to the development of element speciation mapping, i.e. X-ray absorption near edge spectroscopy (XANES) imaging, of environmental samples. This technique is potentially very informative but is also highly data intensive. Here, we used XANES imaging to explore the distribution of Cu species in biosolid materials, destined for agricultural use, as this is of importance in relation to the bioavailability and potential toxicity of this metal. Abstract Fast X-ray detectors with large solid angles and high dynami
APA, Harvard, Vancouver, ISO, and other styles
We offer discounts on all premium plans for authors whose works are included in thematic literature selections. Contact us to get a unique promo code!