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Online since: September 2013
Authors: A.K. Bhaduri, Raj Baldev, U. Kamachi Mudali, M. Vijayalakshmi, M.D. Mathew, P. Chellapandi, S. Venugopal, C.S. Sundar, B.P.C. Rao, B. Venkatraman
Parallelly, a conscious effort was initiated and sustained for decades, to understand the complex relations between the chemistry, structure, thermodynamics and their influence on mechanical and chemical properties.
Based on extensive empirical studies [2, 3] on innumerable combinations of chemistry, the alloying additions were grouped into austenite and ferrite stabilisers, depending mainly on the structure which was stabilised at room temperature.
The empirical relations between the chemistry and the stabilisation of a specific phase were understood based on thermodynamic relations between the free energy of the competing phases, austenite, ferrite and martensite and the chemistry of the stainless steel.
The development [4-6] of different types of stainless steels, based on detailed understanding of the interplay between chemistry, heat treatment, thermodynamics, structure, properties, fabrication and applications, paved way for an excellent, successful journey in the last 100 years, which is briefly summarised dividing the span in periods of 25 years, for convenience and perception.
Hence, DSA plays a beneficial role as as far as ratcheting is concerned, by imparting elastic shakedown to the structure and resisting plastic deformation.
Based on extensive empirical studies [2, 3] on innumerable combinations of chemistry, the alloying additions were grouped into austenite and ferrite stabilisers, depending mainly on the structure which was stabilised at room temperature.
The empirical relations between the chemistry and the stabilisation of a specific phase were understood based on thermodynamic relations between the free energy of the competing phases, austenite, ferrite and martensite and the chemistry of the stainless steel.
The development [4-6] of different types of stainless steels, based on detailed understanding of the interplay between chemistry, heat treatment, thermodynamics, structure, properties, fabrication and applications, paved way for an excellent, successful journey in the last 100 years, which is briefly summarised dividing the span in periods of 25 years, for convenience and perception.
Hence, DSA plays a beneficial role as as far as ratcheting is concerned, by imparting elastic shakedown to the structure and resisting plastic deformation.
Online since: September 2013
Authors: Mohd Azlan Mohd Ishak, Mazlee Mohd Noor, Shamsul Baharin Jamaludin, Zainal Arifin Ahmad, Muhammad Shahar Jusoh, Hoong Chan Wai
The well defined structure has determined characteristic on MOF, creating structure-function relationship.
However, the moderate porous structure limited its adsorption capacity.
Xie, Adsorption of carbon dioxide on activated carbon, Journal of Gas Chemistry. 15 (2006) 223-229
Banerjee, Carbon dioxide capture by metal organic frameworks, Indian Journal of Chemistry. 51A (2012) 1223-1230
Rosario, Carbon dioxide/methane separation by adsorption on sepiolite, Journal of Natural Gas Chemistry. 16 (2007) 235-243
However, the moderate porous structure limited its adsorption capacity.
Xie, Adsorption of carbon dioxide on activated carbon, Journal of Gas Chemistry. 15 (2006) 223-229
Banerjee, Carbon dioxide capture by metal organic frameworks, Indian Journal of Chemistry. 51A (2012) 1223-1230
Rosario, Carbon dioxide/methane separation by adsorption on sepiolite, Journal of Natural Gas Chemistry. 16 (2007) 235-243
Online since: April 2016
Authors: Ivana Marova, Milan Čertík, Emília Breierová
Removal of copper (II) ions from aqua growth medium by red yeast
Emília Breierova1a *, Milan Čertik2b and Ivana Márova3c
1Institute of Chemistry, Slovak Academy of Sciences, Dúbravská cesta 9, 845 38 Bratislava, Slovakia
2Department of Biochemical Technology, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia
3Department of Food Chemistry and Biotechnology, Faculty of Chemistry, Brno University of Technology, Purkyňova 118, 612 00 Brno, Czech Republic
aEmilia.Breierova@savba.sk, bmilan.certik@stuba.sk, cmarova@fch.vutbr.cz
Keywords: copper, red yeasts, exoglycoproteins, carotenoids
Abstract.
Materials and Methods Microorganisms Two yeast strains of species Rhodotorula glutinis CCY 20-2-26 and CCY 20-2-33 and one strain of Sporobolomyces roseus CCY 19-6-4 from the Culture Collection of Yeasts (CCY, Institute of Chemistry, SAS, and Bratislava, Slovakia) were used in this study.
The yeast cell wall and exoglycoproteins are a dynamic structure that can adapt to different physiological states (e.g. sporulation or budding) and various stress conditions (e.g. exposure to cell wall-perturbing agent or hypo-osmotic shock).
This structure could contribute to the higher adsorption capacity of Rhodotorula sp. and Sporobolomyces sp.
Food Chemistry, 107 (2008) 145-150
Materials and Methods Microorganisms Two yeast strains of species Rhodotorula glutinis CCY 20-2-26 and CCY 20-2-33 and one strain of Sporobolomyces roseus CCY 19-6-4 from the Culture Collection of Yeasts (CCY, Institute of Chemistry, SAS, and Bratislava, Slovakia) were used in this study.
The yeast cell wall and exoglycoproteins are a dynamic structure that can adapt to different physiological states (e.g. sporulation or budding) and various stress conditions (e.g. exposure to cell wall-perturbing agent or hypo-osmotic shock).
This structure could contribute to the higher adsorption capacity of Rhodotorula sp. and Sporobolomyces sp.
Food Chemistry, 107 (2008) 145-150
Online since: September 2024
Authors: Siriporn Pranee, Samitthichai Seeyangnok, Chanikan Sonklin, Cherdchai Laongtiparos, Nisalak Trongsiriwat, Aoraya Wongcharu
The structure of methoxyflavone identified from Kaempferia parviflora
rhizomes (1-4).
From structure show Table 1. found that conjugated double bone caused delocalized within the molecule, and the -OH group at ring A position C5 remained stable during the oxidation reaction.
Food chemistry, 2012. 132(3): p. 1150-1155
[10] Chen, D., et al., Kaempferia parviflora and its methoxyflavones: Chemistry and biological activities.
Food chemistry, 2009. 113(4): p. 1202-1205
From structure show Table 1. found that conjugated double bone caused delocalized within the molecule, and the -OH group at ring A position C5 remained stable during the oxidation reaction.
Food chemistry, 2012. 132(3): p. 1150-1155
[10] Chen, D., et al., Kaempferia parviflora and its methoxyflavones: Chemistry and biological activities.
Food chemistry, 2009. 113(4): p. 1202-1205
Online since: June 2011
Authors: Natalia Sobczak, Edmund Sienicki, Jerzy Morgiel, Rafal Nowak
This paper is focused on the analysis of structure, chemistry and phase composition of reactively formed interfacial regions in Al/MgO and Al/MgAl2O4 couples in order to identify the type of possible reactions and accompanying processes taking place at high temperatures.
Structure and chemistry characterization of reaction product region in the solidified, cross-sectioned and mechanically polished Al/MgO and Al/MgAl2O4 couples was carried out by optical microscopy (OM) and scanning electron microscopy (JOEL 3036) coupled with energy dispersive X-ray spectrometry (EDS).
Its structure presents two mutually interpenetrating and continuous networks, similar to that already reported in Al/MgAl2O4 couples [12].
Similar two-layered structure of RPR was reported recently in Al/SiO2 and Al/mullite couples [11] but their EDS analysis did not show any variations in chemistry despite well distinguished differences in the structure of these layers.
Our TEM examinations evidenced that in both cases, the structure and chemistry of whiskers are similar to those of the corresponding single crystal substrates and no new reaction products were detected within each separated whisker.
Structure and chemistry characterization of reaction product region in the solidified, cross-sectioned and mechanically polished Al/MgO and Al/MgAl2O4 couples was carried out by optical microscopy (OM) and scanning electron microscopy (JOEL 3036) coupled with energy dispersive X-ray spectrometry (EDS).
Its structure presents two mutually interpenetrating and continuous networks, similar to that already reported in Al/MgAl2O4 couples [12].
Similar two-layered structure of RPR was reported recently in Al/SiO2 and Al/mullite couples [11] but their EDS analysis did not show any variations in chemistry despite well distinguished differences in the structure of these layers.
Our TEM examinations evidenced that in both cases, the structure and chemistry of whiskers are similar to those of the corresponding single crystal substrates and no new reaction products were detected within each separated whisker.
Online since: October 2018
Authors: Dong Hui Yang, Si Yu Wei, Lei Wang, Chang Wei Yao
Those attractive features of nanoporous metal derive from their special structure.
The Journal of Physical Chemistry B. 2006, 110(9): 4318-4322
Surface-chemistry-driven actuation in nanoporous gold.
Journal of Materials Chemistry, 2009, 19(36):6451-6464
Composite Structures. 2006, 74(4): 399-405
The Journal of Physical Chemistry B. 2006, 110(9): 4318-4322
Surface-chemistry-driven actuation in nanoporous gold.
Journal of Materials Chemistry, 2009, 19(36):6451-6464
Composite Structures. 2006, 74(4): 399-405
Online since: July 2020
Authors: Izan Izwan Misnon, Salasiah Endud, Norazzizi Nordin, Nur Izzatie Hannah Razman
The resulting carbon will resemble the template structure.
Staiti, Influence of the surface-chemistry of modified mesoporous carbon on the electrochemical behavior of solid-state supercapacitors.
Kyotani, synthesis of nitrogen-containing microporous carbon with a highly ordered structure and effect of nitrogen doping on H2O adsorption.
Staiti, Influence of the surface‒chemistry of modified mesoporous carbon on the electrochemical behavior of solid-state supercapacitors.
Kim, Effect of pore structures on electrochemical behaviors of polyacrylonitrile (PAN)-based activated carbon nanofibers.
Staiti, Influence of the surface-chemistry of modified mesoporous carbon on the electrochemical behavior of solid-state supercapacitors.
Kyotani, synthesis of nitrogen-containing microporous carbon with a highly ordered structure and effect of nitrogen doping on H2O adsorption.
Staiti, Influence of the surface‒chemistry of modified mesoporous carbon on the electrochemical behavior of solid-state supercapacitors.
Kim, Effect of pore structures on electrochemical behaviors of polyacrylonitrile (PAN)-based activated carbon nanofibers.
Online since: March 2014
Authors: Ya Li Li, Meng Ying Liu, Sheng Xiang Qu, Shuai Shuai Han, Si Hui Wang
Meanwhile, the high temperature sintering may destroy the structure of CNF imparting the mechanical and electrical properties of the nanocomposites.
Experimental Poly(methylethyl)silazane (-[SiNH2(CH=CH2)]x-[NHSiNH(CH3)]y-) was used as the precursor for SiCN, produced by Institute of Chemistry Chinese Academy of Sciences, Beijing China.
Iron chloride (FeCl3) was used as the catalyst precursor, purchased from Guangfu Fine Chemistry Institute, Tianjin, China.
Therefore, multi-scale structures and nano-structured surfaces can be created from the in-situ growth potentially for developing functional applications.
The composite with micro/nano-structure surface and one dimensional multiscales stucture inside is obtained through this method.
Experimental Poly(methylethyl)silazane (-[SiNH2(CH=CH2)]x-[NHSiNH(CH3)]y-) was used as the precursor for SiCN, produced by Institute of Chemistry Chinese Academy of Sciences, Beijing China.
Iron chloride (FeCl3) was used as the catalyst precursor, purchased from Guangfu Fine Chemistry Institute, Tianjin, China.
Therefore, multi-scale structures and nano-structured surfaces can be created from the in-situ growth potentially for developing functional applications.
The composite with micro/nano-structure surface and one dimensional multiscales stucture inside is obtained through this method.
Online since: July 2023
Authors: Shashanka Rajendrachari, Ayşenur Oğuzyer
However, when looking at their structure, it is seen that they are more complex than micro composites.
• Surface area of formation of nanoparticles with high specificity and generally crystalline structure
To understand the exact shape and structure of the nanocomposites, TEM is well preferred.
Giannelis, Polymer-Layered Silicate Nanocomposites: Synthesis, Properties and Applications, Applied Organometallic Chemistry 12 (1998) 675-680
Karaoglanli, Antimicrobial investigation of CuO and ZnO nanoparticles prepared by a rapid combustion method, Physical Chemistry Research 7(4) (2019) 799-812
• Surface area of formation of nanoparticles with high specificity and generally crystalline structure
To understand the exact shape and structure of the nanocomposites, TEM is well preferred.
Giannelis, Polymer-Layered Silicate Nanocomposites: Synthesis, Properties and Applications, Applied Organometallic Chemistry 12 (1998) 675-680
Karaoglanli, Antimicrobial investigation of CuO and ZnO nanoparticles prepared by a rapid combustion method, Physical Chemistry Research 7(4) (2019) 799-812
Online since: July 2011
Authors: Chang Yu Li, Li Li Liu, Shou Xin Liu
Great effort has been devoted to synthesis of hierarchical structures, however, developing facile and simple methods is still highly desired for synthesis of hierarchical structures.
Finally, the formation mechanism of the self-assembly structures of flowerlike α-Ni(OH)2 was investigated.
These nanosheets are connected to each other to build the 3D flowerlike structures.
Ramesh: Materials Chemistry and Physics.
Vol. 110 (2006), p. 4039 [9] F Liu, J Lu, J Shen and Z Zhang: Materials Chemistry and Physics.
Finally, the formation mechanism of the self-assembly structures of flowerlike α-Ni(OH)2 was investigated.
These nanosheets are connected to each other to build the 3D flowerlike structures.
Ramesh: Materials Chemistry and Physics.
Vol. 110 (2006), p. 4039 [9] F Liu, J Lu, J Shen and Z Zhang: Materials Chemistry and Physics.