Effect of minor content of Gd on the mechanical and degradable properties of as-cast Mg-2Zn-xGd-0.5Zr alloys

2019 ◽  
Vol 35 (4) ◽  
pp. 503-511 ◽  
Author(s):  
Junxiu Chen ◽  
Lili Tan ◽  
Xiaoming Yu ◽  
Ke Yang
Keyword(s):  
Minor Content

Carbon dot based nanopowders and their application for fingerprint recovery

2015 ◽  
Vol 51 (23) ◽  
pp. 4902-4905 ◽  
Author(s):  
D. Fernandes ◽  
M. J. Krysmann ◽  
A. Kelarakis
Keyword(s):  
Incident Radiation ◽  
Carbon Dot ◽  
A Minor ◽  
Minor Content

Hybrid nanopowders with a minor content of non-toxic carbogenic nanoparticles exhibit remarkable colour-tuneability with respect to the incident radiation.

scholarly journals The Lipid and Resin Composition of Laretia compacta Phil, from the Andes of Chile

1999 ◽  
Vol 54 (5-6) ◽  
pp. 309-313 ◽  
Author(s):  
Bernd R. T. Simoneit ◽  
Borys M. Didyk
Keyword(s):  
Carbon Number ◽  
Hydrocarbon Fraction ◽  
Low Carbon ◽  
The Andes ◽  
Plant Group ◽  
Alkanoic Acids ◽  
The Individual ◽  
A Minor ◽  
Trace Components ◽  
Minor Content

Abstract The lipid/resin components of Laretia compacta were characterized by GC-MS and CSIA. The lipid components consist of n-alkanes, n-alkanoic acids and n-alkanols all with low carbon number maxima and high CPI values. The resin components are comprised of major amounts of tetracyclic diterpenoids with a minor content of mono-and sesquiterpenoids. The kaurene skeleton predominates with some phyllocladenes. Phytosterols are trace components. The δ13C data of the individual alkanes in the hydrocarbon fraction place this species in the C4 plant group.

Microstructure and Mechanical Properties and Corrosion Behavior of Ti-Mo-Sn Alloys

2007 ◽  
Vol 348-349 ◽  
pp. 281-284
Author(s):  
Yu Feng Zheng ◽  
Yan Bo Wang
Keyword(s):  
Mechanical Properties ◽  
Tensile Test ◽  
Corrosion Behavior ◽  
Electrochemical Measurement ◽  
Xrd Analysis ◽  
Test Results ◽  
Β Phase ◽  
Measurement Results ◽  
Mechanical Properties And Corrosion ◽  
Minor Content

The phase constitution, mechanical properties, and corrosion behavior of TiMoSn alloys were investigated by means of XRD, tensile test, electrochemical measurement and XPS techniques. The XRD analysis results showed that at room temperature TiMoSn alloys are mainly composed of β phase, with minor content of α" phase, in as-cast and solid solution treated conditions. The tensile test results indicate that the elastic moduli of the Ti-Mo-Sn alloys are in the range of 52~74GPa. The electrochemical measurement results indicate that TiMoSn alloys have excellent corrosion resistance in simulated body fluid. The XPS analysis results reveal that the passive films of TiMoSn alloys after polarization consist of TiO2, SnO2 and Mo2O5.

scholarly journals Salt Mineralvand fra Danmarks dybere Undergrund

1961 ◽  
Vol 4 (6) ◽  
pp. 1-20
Author(s):  
Birthe Dinesen
Keyword(s):  
Ion Exchange ◽  
Mineral Water ◽  
Mineral Waters ◽  
Exchange Reactions ◽  
Salt Solutions ◽  
Drilling Operations ◽  
Salt Deposits ◽  
A Minor ◽  
Uniform Composition ◽  
Minor Content

During the drilling operations of Danish American Prospecting Co. in Denmark 1946-1959 several mineral water occurences were encountered in the subsurface.Samples taken from Zechstein deposits show a composition ranging from concentrated almost pure MgCl2- or CaCl2-solutions to solutions more dominated by NaCl. Usually they seemn to be migrating solutions which have secondarily reacted with the salt deposits they have penetrated.Samples from Jurassic and Danian deposits are more diluted NaCl-solutions with a minor content of CaCl2 and MgCl2.The diluted mineral waters of Denmark are regarded as mixtures of concentrated salt solutions and fresh water.Uniform composition of diluted mineral waters does not necessitate a uniform composition of the original concentraled salt solutions. It may also be brought about by ion exchange reactions between clays and salt solutions of different composition as e.g. the above-mentioned solutions encountered in the Zechstein deposits.

scholarly journals Središnje i rubno u poučavanju hrvatskoga kao inoga jezika

2021 ◽  
pp. 216-234
Author(s):  
Sanda Lucija Udier ◽  
Milvia Gulešić Machata
Keyword(s):  
First Language ◽  
Communication Competence ◽  
Academic Program ◽  
Linguistic Competence ◽  
Learning Materials ◽  
Gradient Distribution ◽  
Instructional Content ◽  
Approach To Teaching ◽  
Everyday Communication ◽  
Minor Content

Teaching Croatian as a foreign language (CFL) significantly differs from the teaching of Croatian as a first language, and the differences arise from the fact that it is intended for different recipients, and that it most often takes place in substantially different contexts. This dissimilarity is largely reflected in the choice of learning materials in the approach to teaching and the progression of teaching, most notably in distinguishing what is considered crucial in teaching from what is considered minor. This paper presents the distribution of teaching materials in terms of those which are considered crucial in the teaching of CFL, and those which are considered minor. Crucial content is considered to be anything that encourages the development of communication competence, i.e. productive grammar, the semantics of grammatical forms, the lexicon of different styles and registers which are involved in everyday communication, as well as paralinguistic content, while minor content is considered to be standardized-prescriptivist questions and disputes, accentuation (except regarding the place of stress), as well as everything that requires the introduction of the metalevel in the teaching of language. In addition to that it is important to bear in mind that this is not a matter of „either … or,“ but rather a gradient distribution along a scale, which largely depends on the degree of linguistic competence at which the teaching takes place, the context of instruction, and the purpose for which CFL is studied. This means that the assessment of whether instructional content is crucial or minor in teaching is made on the basis of the different circumstances in which the teaching takes place – for example whether it is an academic program or course, whether general language or a specialized type of language is being taught, whether the teaching takes place in a program with a large number of lessons or a few, what level of linguistic competence is involved, whether the teachers are with linguistically homogenous or heterogenous groups of learners, what the learning outcomes are, and so on. In comparison with teaching Croatian as a first language, the teaching of CFL is very different and the approach to its instruction is specific, and therefore requires special training and specialization.

La dispersion clastique des débris rocheux dans les eskers et le till adjacent de la région de Chapais–Chibougamau (Québec) au Wisconsinien supérieur

1995 ◽  
Vol 32 (5) ◽  
pp. 590-602 ◽  
Author(s):  
Denis Levasseur ◽  
Gilbert Prichonnet
Keyword(s):  
Source Area ◽  
Glacial Lake ◽  
Variable Rate ◽  
Glacial Erosion ◽  
Frequency Distributions ◽  
Factors Influencing ◽  
Determining Factors ◽  
Minor Content

Petrographie counts of more than 84 500 debris along eskers and in the adjacent till were used to study the dispersion of rock debris derived from local marker outcrops (Opemiska Pluton and Chibougamau Formation) and from distant indicator rocks of Mistassini Basin (Albanel Formation dolomites and Papaskwasati quartzitic sandstones). The frequency distributions are compared for the following granulometric classes:0.8–1.6 cm (fine gravels), 1.6–5.0 cm (small pebbles), 5.0–15.0 cm (large pebbles), and 15.0–45.0 cm (blocks).In the till, the minor content of debris derived from the Chibougamau Formation, downstream from the Waconichi Lake source-area, suggests that glacial erosion in this area was insignificant. Nevertheless, meltwaters transported erratic clasts of this formation for distances of more than 55 km. But the currents that deposited the sediments of the big eskers, which represent a succession of subaquatic outwash deposits, were restrained by the existing Ojibway Glacial Lake. The apparent greater displacement of debris in these eskers, as compared to that in the neighbouring till, is the result of an abundant incorporation of intraglacial materials in the tunnels. Rock debris from the Albanel and Papaskwasati formations were dispersed over distances of more than 250 km.The lack of a significant increase of fine debris at the expense of larger fragments suggests that there was limited crushing at the glacier base, or else limited disintegration in the meltwater currents. The decrease in the frequency of a petrographie marker is mainly controlled by the progressive sedimentation of fragments derived from the indicator outcrop, and by the rate of incorporation of nonmarker debris. Thus, the nature of the eroded rocks, and the size of the marker debris acquired at the source, are determining factors influencing the clastic dispersion. The variable rate of incorporation of rocks issued directly from the dispersion area are in large part responsible for the irregularities in the curves representing the concentration of marker debris. [Journal Translation]

scholarly journals THE CONTENTS OF SOME GROUPS OF COMPOUNDS IN THE LEAVES AND RHIZOMES OF IRIS HYBRIDA HORT. SORT CORONATION

2018 ◽  
pp. 131-136 ◽  
Author(s):  
Людмила (Ljudmila) Леонидовна (Leonidovna) Седельникова (Sedel'nikova) ◽  
Татьяна (Tat'jana) Абдулахиловна (Abdulahilovna) Кукушкина (Kukushkina)
Keyword(s):  
Ascorbic Acid ◽  
Phenolic Compounds ◽  
Growing Season ◽  
Comparative Data ◽  
Biologically Active ◽  
Seasonal Development ◽  
Vegetative Organs ◽  
Pectin Content ◽  
Quantitative Content ◽  
Minor Content

The paper presents comparative data on the content of biologically active in the vegetative organs of Iris hybrida cultivar Coronation. First described the results of a study of the contents of the spare substances (sugar, starch), saponins, ascorbic acid, pectin (pectin, protopectin), phenolic compounds (catechins, flavonols) in leaves and rhizomes of plants of the variety Coronation. The quantitative content of the main groups of substances in underground and aboveground organs during the growing season, flowering and fruiting. Found that the presence of ascorbic acid in the leaves of Iris hybrida varieties of Coronation higher than in the rhizomes in 10–24 times during the growing season, 5.4–9 times the period of flowering, 2.5 to 6.3 times in the period of fruiting. The pectin content was 2–8 times less than protopectin in leaves and rhizomes of plants. Catechins differed in minor content (0.014–0.48%). Saponins in the leaves (21.86–30.27%) and rhizomes (14.86–30.27%) showed high content in the period of regrowth and flowering in cool-moist 2013–14 Sugars in the leaves found in 5–14 times more than the rhizomes during the period of fruiting. The pre-winter amount of starch in the rhizomes were relatively stable and had high rates from 17.5 to 28.3% in all years of observations. The identified variability is biologically active and spare substances in the vegetative organs of Iris hybrida varieties of Coronation in connection with seasonal development.

scholarly journals Content of rare earth elements in basalt aggregate from Winna Góra, Poland

2021 ◽  
pp. 315-326
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
Mineral Composition ◽  
Rietveld Method ◽  
Total Content ◽  
Trace Element Content ◽  
Icp Ms ◽  
A Minor ◽  
Minor Content ◽  
Lower Silesia

Seek for new Rare Earth Elements (REE) sources encourage looking for easily available sources located in Europe. REE in evolved magmatic systems are predominantly associated with alkali environments. Therefore, it was decided to identify the content of REE in alkali igneous rocks of the Winna Góra basalt quarry located in Lower Silesia, Poland. In this study, a commercially available basalt aggregate from Winna Góra deposit located in the south-western part of Poland near Jawornik was examined for REE content. Mineral content and chemical composition were examined with a light microscope, XRD and XRF, whereas trace element content was measured with the ICP-MS technique. A new method of sample preparation for the purpose of REE identification in basalt aggregate based on pressure microwave mineralisation was developed. Mineral composition and TAS diagram classify aggregate as tephrite. The mineral composition of samples reflects typical mafic and ultramafic rocks. Quantitative mineralogical analysis by the Rietveld method showed that the main minerals are anorthite (46.7%) and augite (37.4%) with a minor content of forsterite (7.5%), nepheline (7.4%) and apatite below 1%. The total content of REE does not exceed 132 ppm. Chondrite normalised curves show the highest concentration of La and Pr. In the case of HREE, the majority of elements (Eu, Tb, Dy, Ho, Er, Yb) concentrations were below 1 ppm, a Tm and Lu were not detected. The low enrichment in HREE was also reflected in La/Gd ratios. Obtained results are comparable to the REE contents in the western part of the Cenozoic European Volcanic Province.

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