NANOSTRUCTURAL PROCESSES OF MELTING AND MOULDING OF CAST IRON WITH GLOBULAR GRAPHITE

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) ◽

10.21122/1683-6065-2017-3-45-48 ◽

2017 ◽

pp. 45-48

Author(s):

E. I. Marukovich ◽

V. Yu. Stetsenko

Keyword(s):

Cast Iron ◽

Adsorbed Oxygen ◽

Globular Graphite ◽

Physical And Chemical

It is shown that melting and molding of cast iron with globular graphite are complex physical and chemical nanostructural processes. The major role in these processes is played by the centers of crystallization of dendrites of graphite, graphite nanocrystals, the dissolved and adsorbed oxygen. The role of the modifying ligature of FeSiMg is reduced generally to essential decrease of concentration of the adsorbed oxygen and an enrichment of fusion by the centers of crystallization of graphite dendrites.

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NANOSTRUCTURAL PROCESSES OF MELTING AND CASTING OF CAST IRON WITH FLAKY GRAPHITE

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) ◽

10.21122/1683-6065-2017-1-7-10 ◽

2017 ◽

pp. 7-10

Author(s):

E. I. Marukovich ◽

V. Yu. Stetsenko

Keyword(s):

Cast Iron ◽

Adsorbed Oxygen ◽

Physical And Chemical

It is shown that melting and casting of cast iron with flaky graphite are the complex physical and chemical nanostructural processes. The majorrole in these processis played by the centers of crystallization of dendrites of graphite, graphite nanocrystals, the dissolved and adsorbed oxygen. The modifying ligature of FS75 is used to decrease concentration of the adsorbed oxygen and to fusion enrichment by the centers of crystallization of dendrites of graphite.

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The Study of the Role of Fullerene Black Additive during the Modification of Ductile Cast Iron

Materials Science Forum ◽

10.4028/www.scientific.net/msf.891.235 ◽

2017 ◽

Vol 891 ◽

pp. 235-241

Author(s):

Nelya Amanjolovna Shamelkhanova ◽

Alma Muratbekovna Uskenbayeva ◽

Alexander Tikhonovich Volochko ◽

Sergey Pavlovich Korolyov

Keyword(s):

Cast Iron ◽

Microstructural Analysis ◽

Ductile Cast Iron ◽

High Potential ◽

Structure And Properties ◽

Globular Graphite ◽

Fullerene Black ◽

Graphitization Degree ◽

Modifying Additive

The use of fullerene black (FB) as effective modifying additive to cast iron is substantiated by its high potential. Research of nanoadditives to modifier has shown an increase in graphitization degree and the forming of favorable morphology of globular graphite. The results of microstructural analysis and tribological trials have confirmed an improvement of ductile cast iron’s structure and properties when treated with FB-additive.

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ALUMINIUM BRONZE. NANOSTRUCTURAL PROCESSES OF MELTING AND MOULDING

Litiyo i Metallurgiya (FOUNDRY PRODUCTION AND METALLURGY) ◽

10.21122/1683-6065-2018-1-12-15 ◽

2018 ◽

pp. 12-15

Author(s):

E. I. Marukovich ◽

V. Yu. Stetsenko

Keyword(s):

Dissolved Oxygen ◽

Chemical Processes ◽

Adsorbed Oxygen ◽

Aluminum Bronze ◽

Aluminium Bronze ◽

Physical And Chemical

It is shown that melting and molding of aluminum bronze are difficult physical and chemical processes. In them the major role is played by the centers of crystallization of dendrites of a a-phase, the a-phase nanocrystals dissolved and the adsorbed oxygen and hydrogen. The role of the modifying crystals of an intermetallid of ZrAl3 is reduced to reduction of concentration of the dissolved oxygen and hydrogen and an intensifi ation of process of coagulation of nanocrystals of a a-phase in the centers of crystallization of dendrites of a a-phase.

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The role of physical and chemical characteristics in assessing the performance of a new biological vascular graft

Journal of Biomedical Materials Research ◽

10.1002/jbm.820230405 ◽

1989 ◽

Vol 23 (4) ◽

pp. 443-450 ◽

Cited By ~ 8

Author(s):

G. Roberts ◽

H. McCormack ◽

V. Ketharanathan ◽

D. G. Macleish ◽

P. L. Field ◽

...

Keyword(s):

Vascular Graft ◽

Chemical Characteristics ◽

Physical And Chemical Characteristics ◽

Physical And Chemical

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The role of emergent physical and chemical properties of Florida springs in predicting fish assemblage structure

Freshwater Science ◽

10.1086/716102 ◽

2021 ◽

Author(s):

Kirsten Work

Keyword(s):

Fish Assemblage ◽

Chemical Properties ◽

Assemblage Structure ◽

Fish Assemblage Structure ◽

Physical And Chemical Properties ◽

Physical And Chemical ◽

Florida Springs ◽

And Chemical Properties

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Transportation pathways of pesticides in two major watersheds of Istanbul, Turkey

Water Science & Technology ◽

10.2166/wst.2004.0187 ◽

2004 ◽

Vol 49 (3) ◽

pp. 165-172 ◽

Cited By ~ 1

Author(s):

M. Yazgan ◽

A. Tanik

Keyword(s):

Chemical Properties ◽

Surface Flow ◽

Priority List ◽

Pesticide Pollution ◽

Consumption Values ◽

Annual Consumption ◽

Agricultural Areas ◽

Physical And Chemical ◽

And Chemical Properties

The study covers the investigation of pesticides in terms of consumption, toxicological classification and various intrinsic physical and chemical properties like DT50, KOC, GUS, solubility that describe the important mechanisms prevailing in soil, namely persistence and mobility. These mechanisms help to estimate the transportation pathways of pesticides on soil till they reach the receiving water after being applied on land. Classification is done in three groups, those likely to appear in surface flow, those that appear in groundwater and those that present transient conditions. Such an approach that also takes into account toxicological levels and annual consumption values of pesticides will act as a tool to prepare the priority list of pesticides that need special care during their transportation. The fate of pesticides is a difficult task to solve, however, such a methodology, puts forth a rough estimate on their behavior in spite of uncertainties in many of the parameters describing mechanisms like persistence and mobility. The agricultural areas of two watersheds of Istanbul are selected as target areas to describe the approach, which is also checked with another approach estimating pesticide pollution potential that considers various other properties of pesticides. Almost similar findings are depicted with 85% proximity. The methodology presented in the paper illustrates and emphasizes the significant role of pesticide properties in determining their fate in soil after being applied.

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Di-imide: Some Physical and Chemical Properties, and the Kinetics and Stoichiometry of the Gas-phase Decomposition

Canadian Journal of Chemistry ◽

10.1139/v73-536 ◽

1973 ◽

Vol 51 (21) ◽

pp. 3605-3619 ◽

Cited By ~ 35

Author(s):

C. Willis ◽

R. A. Back

Keyword(s):

Gas Phase ◽

Room Temperature ◽

Chemical Properties ◽

Phase Decomposition ◽

Important Intermediate ◽

Long Lifetime ◽

Physical And Chemical ◽

Text Formation ◽

Kinetics Of

Preparation of di-imide by passing hydrazine vapor through a microwave discharge yields mixtures with NH3 containing typically about 15% N2H2, estimated from the gases evolved on decomposition. The behavior of the mixture (which melts at −65 °C) on warming from −196 to −30 °C suggests a strong interaction between the components. Measurements of magnetic susceptibility and e.p.r. experiments showed that N2H2 is not strongly paramagnetic, which with other observations points to a singlet rather than a triplet ground-state.Di-imide can be vaporized efficiently, together with NH3, by rapid warming, and the vapor is surprisingly long-lived, with a typical half-life of several minutes at room temperature. The near-u.v. (3200–4400 Å) absorption spectrum of the vapor was photographed; it shows well-defined but diffuse bands, with εmax = 6(± 3) at 3450 Å.Di-imide decomposes at room temperature in two ways:[Formula: see text][Formula: see text]Formation of NH3 was not observed but cannot be ruled out. The decomposition of the vapor is complicated by a sizeable and variable decomposition that occurs rapidly during the vaporization. The stoichiometry of this and the vapor-phase decomposition depends on total pressure and di-imide concentration. The kinetics of the decomposition of the vapor were studied from 22 to 200 °C by following the disappearance of N2H2 by absorption of light at 3450 Å, or the formation of N2H4 by absorption at 2400 Å, and by mass spectrometry. The kinetics are complex and can be either first- or second-order, or mixed, depending on surface conditions. The effect of olefin additives on the decomposition was studied, and is also complex.Mechanisms for the decomposition are discussed, including the possible role of trans-cis isomerization. The relatively long lifetime found for di-imide in the gas phase suggests that it may be an important intermediate in many reactions of hydronitrogen systems.

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ROLE OF NANOTECHNOLOGY IN DENTAL SCIENCES: A REVIEW

International Journal of Medical and Biomedical Studies ◽

10.32553/ijmbs.v4i3.1055 ◽

2020 ◽

Vol 4 (3) ◽

Author(s):

Ramakoteswara Rao N ◽

Kranthi kiran Reddy E ◽

Leena Gahane ◽

SV Ranganayakulu

Keyword(s):

Materials Science ◽

Biological Properties ◽

Synthesis Methods ◽

Nano Technology ◽

New Science ◽

Physical Chemical ◽

Health Related ◽

Nano Science ◽

Physical And Chemical

Nano technology is the multi disciplinary science and technology, which has emerged as new science exploiting specific phenomena and direct manipulation of materials on nanoscale. Nanotechnology deals with the physical, chemical, and biological properties of structures and their parts at nanoscale dimensions. It's established on the concept by creating functional structures by controlling corpuscles and molecules on a one-by-one basis by different physical and chemical synthesis methods. Developments in materials science and, nano biotechnology is especially forestalled to provide elevates in dental sciences and initiations in oral health-related diagnostic and therapeutical methods. Keywords: Nano Science, dentistry, Nanocomposite, Nanorobots, Nanomaterials.

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Phenolic Compounds in Honey and Their Relationship with Antioxidant Activity, Botanical Origin, and Color

Antioxidants ◽

10.3390/antiox10111700 ◽

2021 ◽

Vol 10 (11) ◽

pp. 1700

Author(s):

Ana L. Becerril-Sánchez ◽

Baciliza Quintero-Salazar ◽

Octavio Dublán-García ◽

Héctor B. Escalona-Buendía

Keyword(s):

Antioxidant Activity ◽

Phenolic Compounds ◽

Geographical Origin ◽

Sensory Characteristics ◽

Intrinsic Properties ◽

The Status ◽

Great Relevance ◽

Therapeutic Properties ◽

Physical And Chemical

Honey has been employed since antiquity due to its sensory, nutritional, and therapeutic properties. These characteristics are related to its physical and chemical composition. For example, phenolic compounds are substances that can determine antioxidant activity, as well as sensory characteristics, and can be employed as biomarkers of floral and geographical origin. This has generated a growing interest in the study of phenolic compounds and their influence in the intrinsic properties of this beekeeping product. This review aims to summarize, analyze, and update the status of the research that demonstrates the role of phenolic compounds in antioxidant activity, botanical-geographical origin, and the sensory characteristics of honey. These phenolic compounds, according to various results reported, have great relevance in honey’s biological and functional activity. This leads to research that will link phenolic compounds to their floral, geographical, productive, and territorial origin, as well as some sensory and functional characteristics.

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