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Speciation analysis
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Part 1 book "Inorganic trace analytics" edited by Henryk Matusiewicz and Ewa Bulska includes content: Sample preparation for inorganic trace element analysis, analytical techniques for trace element determination, trace elements in the environment, food analysis and speciation.
273p
muasambanhan09
16-03-2024
5
0
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Part 2 book "Inorganic trace analytics" edited by Henryk Matusiewicz and Ewa Bulska includes content: Trace element and speciation analysis of biological samples; forensic analysis of microtraces, industrial analysis and speciation, quality of results in trace element and speciation analysis, sample pretreatment for trace speciation analysis, solid phase extraction in fractionation of trace elements.
185p
muasambanhan09
16-03-2024
2
0
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Considerable interest is continuing to be shown in the speciation of metals, metalloids, and organometals due to the dependence of their toxicity and mobility on their chemical form. This review focuses on the speciation analysis of metals, metalloids, and organometals by solid phase extraction before spectrometric detection, and all aspects of analytical speciation such as determination of oxidation states and organometallic compounds. Some applications of speciation of metals and metalloids are also presented and discussed in this review.
21p
langthannam
29-12-2021
12
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Chromium is an element with important biological characteristics, depending on its different species. Cr(III) is considered as essential; however, the Cr(VI) form is classified as carcinogenic. For this reason, speciation analysis in food samples is a very important question. The proposed data procedures for chromium redox speciation in the literature can be divided into those with the use of online hyphenated techniques and those where appropriate sample pretreatment is necessary.
12p
langthannam
29-12-2021
5
0
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A new chromium(III) ion-imprinted polymer (IIP) was prepared from a Cr(III)-nicotinate complex (template), acrylamide (functional monomer), and ethylene glycol dimethacrylate (cross-linking agent) using 2,2’-azobisisobutyronitrile as the radical initiator. IIP was characterised and used as a selective sorbent for the solid-phase extraction of Cr(III) ions. The conditions for dynamic separation of Cr(III) on IIP were optimised.
11p
langthannam
29-12-2021
18
0
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The kinetic pathway of oxidation of crotyl alcohol by sodium salt of N -chloro-4-methylbenzene sulphonamide (chloramine-T) in acidic and alkaline medium has been studied. The speciation of chloramine-T has been made to suggest a proper and reasonable reaction mechanism. The thermodynamic quantities such as activation energy and activation entropy are evaluated in acidic as well as in catalysed alkaline medium. An anticipated reaction mechanism has been suggested.
21p
tudichquannguyet
29-11-2021
12
1
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Skeletonema species are prominent primary producers, some of which can also cause massive harmful algal blooms (HABs) in coastal waters under specific environmental conditions. Nevertheless, genomic information of Skeletonema species is currently limited, hindering advanced research on their role as primary producers and as HAB species. Mitochondrial genome (mtDNA) has been extensively used as “super barcode” in the phylogenetic analyses and comparative genomic analyses. However, of the 21 accepted Skeletonema species, full-length mtDNAs are currently available only for a single species, S.
14p
vilarryellison
29-10-2021
5
0
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Salmonid fishes exhibit high levels of phenotypic and ecological variation and are thus ideal model systems for studying evolutionary processes of adaptive divergence and speciation. Furthermore, salmonids are of major interest in fisheries, aquaculture, and conservation research. Improving understanding of the genetic mechanisms underlying traits in these species would significantly progress research in these fields.
17p
vilarryellison
29-10-2021
13
1
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The Lycoris genus includes many ornamentally and medicinally important species. Polyploidization and hybridization are considered modes of speciation in this genus, implying great genetic diversity. However, the lack of effective molecular markers has limited the genetic analysis of this genus.
14p
vijichea2711
28-05-2021
16
1
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Both selection effects and whole genome duplication played very important roles in plant speciation and evolution, and to decipher the corresponding molecular footprint has always been a central task of geneticists.
14p
vijichea2711
28-05-2021
9
1
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Enterococci mainly being commensals in human faeces are now considered as an important cause of nosocomial infections. Of the infections, the commonly observed are urinary tract infections, abdominal infections followed by bacteremia, endocarditis and meningitis rarely. Speciation of Enterococcus aids in effective management of the infections caused by them. The initial treatment for enterococcal infections has become challenging due to development of resistance. The resistance has been observed mainly against aminoglycosides due to the presence of bi-functional gene.
14p
chauchaungayxua8
03-10-2020
15
2
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Cuticular wax production on plant surfaces confers a glaucous appearance and plays important roles in plant stress tolerance. Most common wheat cultivars, which are hexaploid, and most tetraploid wheat cultivars are glaucous; in contrast, a wild wheat progenitor, Aegilops tauschii, can be glaucous or non-glaucous.
14p
viminato2711
22-05-2020
13
0
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Cancer antigen CA125 represents an extracellular part of transmembrane mucin MUC16 and may be expressed in tissues of the male reproductive tract. It reaches human seminal plasma (hSP) after undergoing the main processes involved in protein speciation: Synthesis, posttranslational modifications, compartmentalization, and auto/proteolytic degradation.
9p
nutifooddau
27-01-2019
15
1
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A method for determination of arsenic species in environmental samples have been studied (water and sediment of Nhatrang onshore). The analytical method used was ion-exchange liquid chromatography coupled on-line to atomic absorption pectrometry through hydride generation. It was applied to determination of As species in H3PO4+NH2OH.HCl extracts of sediments. The efficiency of this extraction procedure was studied in details. The sensibility of this investigated method allows both the analysis of As-poor samples and the dilution extracts, of As-rich ones.
12p
uocvong01
24-09-2015
85
4
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This article reviews methods for the determination and identification of trace elements in wine by using atomic absorption spectrometry (AAS). Wine is one of the most widely consumed beverages and strict analytical control of trace elements content is required during the whole process of wine production from grape to the final product.
15p
nguyendinhtrungpv
16-08-2013
59
2
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As well as pioneering a new, broader definition of environmental goods and services, this report has expanded the scope of analysis to include activities within the broader environmental supply chain as well as activities across the full environmental value chain ‐ including R&D, design and development, installation, manufacturing, supply, distribution, retail, maintenance, operations, consultancy and support services. This inclusion is similar to the way other sectors of the economy, such as aerospace, are measured.
0p
dangsuynghi
15-03-2013
69
11
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Understanding the long-term patterns of speciation and extinction may help sci- entists answer some of the biggest questions about today’s patterns of bio diver- sity—such as why the tropics are so diverse. David Jablonski, a paleontologist at the University of Chicago, has tackled the question by analyzing the fossil record of bivalves, noting where they were located, how large their ranges became, and how long they endured. Jablonski’s analysis of 3,599 species from the past 11 million years revealed a striking pattern.
51p
machuavo
19-01-2013
54
6
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Even as new species are evolving, however, others may become extinct. The rate at which species become extinct may be low in one lineage and high in another. It’s also possible for the rate of extinction to rise, only to drop again later. All of these processes can also unfold at the same time, and so the range of possible long-term patterns in evolution can be enormous. A lineage with a low rate of speciation may end up enormously diverse because its rate of extinction is even lower.
35p
machuavo
19-01-2013
41
8
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Data analysis tools are the core of the NSM suite; these are the tools which actually detect and support analyses of intrusive activity. With the exception of the GUI_nsm, these are post-mortem tools to investigate data already saved to disk. In addition to analyzing data collected by one of the NSM’s data capture tools, these post-mortem tools can also analyze data collected by TCPdump. Support tools manipulate existing data to support further analysis and enable the other NSM tools.
88p
cao_can
02-01-2013
102
5
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Reporting that rare species are more abundant on larger islands, they make the case for greater conservation efforts on larger islands. In the next chapter, Hugo Mejía-Madrid evaluates the roles of heterochrony and ecological fitting in the evolution of helminth fish parasites. Contrary to expectations, helminth speciation lags substantially behind that of their hosts, tending to occur in pulses associated with continent jumps among hosts. Next in this section, Toshiharu Mita et al.
738p
conquynho32
18-09-2012
69
15
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