Comparative Analysis of the Chemical Composition and Sorption, Textural, and Strength Properties of Commercial Medical CO2 Sorbents

2020 ◽  
Vol 12 (1) ◽  
pp. 1-6
Author(s):  
V. S. Derevshchikov ◽  
E. D. Kazakova
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Strength Properties

Comparative analysis of sorptive, textural, strength properties and chemical composition of commercial medical CO2 sorbents

2019 ◽  
Vol 19 (4) ◽  
pp. 258-264
Author(s):  
V. S. Derevshchikov ◽  
E. D. Kazakova
Keyword(s):  
Carbon Dioxide ◽  
Comparative Analysis ◽  
Chemical Composition ◽  
Physicochemical Properties ◽  
Strength Properties ◽  
Chemical Compositions ◽  
Effective Protection ◽  
Textural Characteristics ◽  
Protection Time ◽  
Attrition Resistance

Physicochemical properties of commercial medical CO2 sorbents Amsorb Plus, Draeger 800, Draeger free, Loflosorb, Sodasorb, Sofnolime, Spherasorb, Ventisorb, as well as of the Russian adsorbent HPI were studied to determine the chemical compositions, textural characteristics, effective protection time with respect to CO2; crushing and attrition resistance of granular sorbents were measured using the SHELL SMS-1471 and ASTM D 4058 96 procedures. The best performance (a high CO2 capacitance, strength) was observed with Draeger 800. The obtained data on operating properties of commercial sorbents and recommendations can be useful for medicine, rescue works, as well as for scientific and production activities when cleaning air mixtures from carbon dioxide is necessary.

scholarly journals Comparative Analysis of Shear Strength Parallel to Fiber of Different Local Bamboo Species in the Philippines

2021 ◽  
Vol 13 (15) ◽  
pp. 8164
Author(s):  
Brian E. Bautista ◽  
Lessandro E. O. Garciano ◽  
Luis F. Lopez
Keyword(s):  
Mechanical Properties ◽  
Shear Strength ◽  
Comparative Analysis ◽  
Strength Properties ◽  
The Philippines ◽  
Bamboo Species ◽  
Test Protocol ◽  
Future Design ◽  
Average Shear Strength ◽  
Bambusa Vulgaris

There are limited published studies related to the mechanical properties of bamboo species in the Philippines. In this study, the shear strength properties of some economically viable bamboo species in the Philippines were properly characterized based on 220 shear test results. The rationales of selecting this mechanical property are the following: (1) Shear strength, parallel to the fiber, has the highest variability among the mechanical properties; and (2) Shear is one of the governing forces on joint connections, and such connections are the points of failure on bamboo structures when subjected to extreme loading conditions. ISO 22157-1 (2017) test protocol for shear was used for all tests. The results showed that Bambusa blumeana has the highest average shear strength, followed by Gigantochloa apus, Dendrocalamus asper, Bambusa philippinensis, and Bambusa vulgaris. However, comparative analysis, using One-way ANOVA, showed that shear strength values among these bamboo species have significant differences statistically. A linear regression model is also established to estimate the shear strength of bamboo from the physical properties. Characteristic shear strength is also determined using ISO 12122-1 (2014) for future design reference.

Strength Properties and Chemical Composition of Materials Used in Weathering Steel Bridges

2013 ◽  
Vol 739 ◽  
pp. 292-297 ◽  
Author(s):  
Vit Křivý ◽  
Petr Konečný ◽  
Viktor Urban
Keyword(s):  
Chemical Composition ◽  
Statistical Evaluation ◽  
Strength Properties ◽  
Weathering Steel ◽  
The Czech Republic ◽  
Analysis And Evaluation ◽  
Real Material ◽  
Materials Used ◽  
Hot Rolled ◽  
Rolled Plates

The paper deals with a statistical evaluation of the real material properties of weathering steels used for the construction of motorway bridges in the Czech Republic between 2001 and 2007. The statistical analysis and evaluation is carried out for a range of hot rolled plates made of S355J2W weathering steel. The paper contains an evaluation of the strength properties of the steel and its chemical composition. The paper also contains derived real values of partial factors of materials corresponding to the relevant reliability classes RC1 to RC3 pursuant to the European standard EN 1990.

Comparative Analysis of the Strength properties of Specimens Printed from Three Different Types of 3-D Printers

2021 ◽  
Author(s):  
madinah shamsu ◽  
Tesfaye Segni ◽  
Olurotimi Joaquim ◽  
Oluwatosin Fagbuyi ◽  
Landon Onyebueke
Keyword(s):  
Comparative Analysis ◽  
Strength Properties ◽  
Different Types

scholarly journals Kwestia chronologii, typologii i pochodzenia szklanej biżuterii z wczesnośredniowiecznego ośrodka grodowego w Gnieźnie

2020 ◽  
Vol 25 ◽  
pp. 247-289
Author(s):  
Joanna Sawicka
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Glass Composition ◽  
Starting Material ◽  
14C Dating ◽  
Glass Strip ◽  
X Ray ◽  
General Manner ◽  
Physico Chemical ◽  
Early Settlement

The study presents 175 artefacts from the settlement center in Gniezno – beads and rings. The materials come from settlement levels from around the mid-10th to the 13th centuries. The latest chronological findings based on 14C dating have made it possible to refine the dating, especially of the early settlement levels of the stronghold, where the vast majority of glass artefacts come from. Threeba sic groups of beads have been distinguished based on the technique of their production – beads made of a drawing a tube, the technique of winding a glass strip, as well as casting and sintering. The results of 7 physico-chemical analyzes of the glass composition (performed with the X-Ray Fluorescence, XRF method) are presented. Physicochemical analyzes of the chemical composition of the tested beads made it possible to determine the technological group and the type of glass. An attempt was made to explain the origin of the starting material (glass) for jewelery. A comparative analysis made it possible to indicate in a general manner possible manufacturers and to outline the likely directions of the influx of these glass ornaments to Gniezno.

scholarly journals Geological nature of mineral licks and the reasons for geophagy among animals

2016 ◽  
Author(s):  
Alexander M. Panichev ◽  
Vladimir K. Popov ◽  
Igor Y. Chekryzhov ◽  
Ivan V Seryodkin ◽  
Alexander A. Sergievich ◽  
...  
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Volcanic Belt ◽  
Sikhote Alin ◽  
Forage Plants ◽  
Geological Conditions ◽  
Mineral Substances ◽  
Mineral Licks ◽  
Toxic Concentrations ◽  
Early Cenozoic

Abstract. In this paper, the reasons for geophagy (the eating of rocks by wild herbivores) in two regions of the Eastern Sikhote-Alin volcanic belt are considered. The mineralogical and chemical features of the consumed rocks, and also the geological conditions of their formation are investigated. A comparative analysis of the mineral and chemical composition of the consumed rocks and the excrement of the animals, almost completely consisting of mineral substances, is carried out. It is established that the consumed rocks are hydrothermally-altered rhyolitic tuffs located in the volcanic calderas and early Cenozoic volcano-tectonic depressions. They consist of 30–80 % from zeolites (mainly clinoptilolites) and smectites, possessing powerful sorption properties. According to the obtained data, the main reason for geophagy may be connected with the animals’ urge to discard excessive and toxic concentrations of certain elements that are widespread in specific habitats and ingested with forage plants.

scholarly journals ECOGEOCHEMICAL DIAGNOSTICS CONDITION OF URBAN ENVIRONMENT ON POLLUTION SNOW COVER OF VORONEZH CITY

2015 ◽  
Vol 4 (4) ◽  
pp. 121-126
Author(s):  
Tatiana Ivanovna Prozhorina ◽  
Semyon Aleksandrovitch Kurolap ◽  
Nadezhda Ivanovna Yakunina
Keyword(s):  
Comparative Analysis ◽  
Chemical Composition ◽  
Snow Cover ◽  
Urban Environment ◽  
Chemical Elements ◽  
Rapid Assessment ◽  
High Sorption ◽  
Express Methods ◽  
Functional Areas ◽  
The City

Currently, the most popular are the express methods of quality control of the environment, which permit a relatively rapid assessment of ecological and geochemical situation. one such method is based on the use snow cover. snow has a high sorption capacity and is informative in identifying the object of man-made pollution of the urban environment. the paper presents the results of a study of the chemical composition of snow that had fallen in Voronezh during winter 2015. snow samples were taken in the period prior to snowmelt in various functional areas of the city. in order to identify the degree of technogenic impact on the various parts of the city of Voronezh, was made a comparative analysis of the results:аccording to the actual presence of pollutants in precipitation for the study of functional areas;сalculate the rate on the concentration of chemical elements for test samples of snow.according to the degree of mineralization and dust content in snow can be seen technogenic pressure on environment.therefore, a comparative analysis of the degree of contamination of snow in the various functional areas of the city were carried out for the two indicators of the chemical composition - the total mineralization and suspended particles(dust).the results of the analysis of the chemical composition of the melt water indicate an increased level of technogenic pollution of snow cover in all investigated functional areas of Voronezh.

Abrasive Wear Resistance Comparative Analysis of the Metal Surfaced by Flux Cored Wires Systems Fe-C-Si-Mn-Ni-Mo-W-V and Fe-C-Si-Mn-Cr-Ni-Mo-V

2017 ◽  
Vol 906 ◽  
pp. 1-7 ◽  
Author(s):  
I.V. Osetkovskiy ◽  
N.A. Kozyrev ◽  
R.E. Kryukov
Keyword(s):  
Grain Size ◽  
Wear Resistance ◽  
Comparative Analysis ◽  
Chemical Composition ◽  
Abrasive Wear ◽  
Abrasive Wear Resistance ◽  
Metallographic Analysis ◽  
Deposited Metal ◽  
Cored Wires ◽  
Made In

In the article is shown the comparative analysis between structures of surfaced by the flux coded wire metal systems Fe-C-Si-Mn-Cr-Ni-Mo-V and Fe-C-Si-Mn-Ni-Mo-W-V. These powder wires are supposed to be used in recovering details and equipment components and machines, that works in conditions of intensive abrasive – shock wear. Manufacturing and surfacing of flux cored wires samples were made in laboratory conditions. Defined chemical composition of the surfaced metal. Deposited metal samples hardness and wear resistance were researched. In the course of deposited meta surface metallographic analysis were made following metallographic researches: defined nature and level of nonmetallic oxides impurity, type and morphology of the microstructure, grain size of surfaced samples. Estimation of the chemical composition components influence on the hardness and wear resistance were obtained.

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