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Online since: June 2020
Authors: Agija Stanke, Marius Enachescu, Valdis Kampars, Oana A. Lazar
Average pore size is 6.95 nm, homogeneous immobilized Fe2O3 nanoparticles do not disrupt the porous hexagonal structure of the support.
SiO2 is the most common and the most suitable catalyst support or structure promoter for iron catalysts used in FT synthesis [3].
Direct synthesis usually ensures a uniform dispersion of functional groups on the surface of material and a structure that preserves its surface [5].
The highly ordered mesoporous structure of Fe2O3/SBA-15 was further confirmed by STEM technique.
Fantini, Structure and Morphology of SBA-15 Thin Films on Different Substrates, Brazilian J.
Online since: December 2022
Authors: Feng Shan, Chen Can Wang, Yao Zhang, Cai Yun Zhang, Zi Jun Niu
Simulation Model and Methods The reference structure model of OSC is shown in fig. 1(a).
With regard to the designed OSC structure, two metal nanostructures are shown in Figs. 1 (b) and (c).
Figure 1 Schematic diagram of OSC structure.
(a) reference model structure, (b) metal nanospheres model structure, (c) metal nano-star model structure.
Figure 3 Calculation results of electric field distribution on the surface of gold nanoparticles, (a) nanospheres structure, (b) nano-star structure.
Online since: September 2020
Authors: Akeem Adekunle Adewale, Ruhiyuddin Mohd Zaki, Abdullah Chik
In the crystal structure of perovskite compound A- and B- sites are occupied by cation of different atomic size [2,3].
The band structure of BaTiO3 and Ba0.875Ca0.125Ti0.875Zr0.125O3 are shown in Fig. 1 (a and b) respectively.
Mookerjee, Electronic structure, chemical bonding, and optical properties of paraelectric BaTiO3, Physical Rev.
Mrharrab, Effect of Sr addition on piezoelectric properties and the transition temperature of BaTiO3, Glass Physics and Chemistry 43.1 (2017): 91-97
Bajpai, Effect of Sr-doping on the band structure of BaTiO3 through density functional theoretical calculations, Comp.
Online since: May 2016
Authors: Prakash Chandra Sahoo, Satyabadi Martha, Kulamani Parida
Several nano-structured semiconductor photocatalyst such as: metal oxides, heterojunctions, porous materials, layered materials, materials with hierarchical structure, and nano biocatalysts are acknowledged as good candidate for CO2 photo reduction.
Kroto et al discovered first such structure from C60 molecule [57]. 
It possesses a stacked 2-dimensional graphite-like planar structure having π-conjugated systems.
Our dream would be successful with a concerted joint attempt among scientists from the fields of chemical engineering, material science, physics, chemistry and theoretical chemist.
Domen, Chemistry of Materials, 20 (2007) 110-117
Online since: July 2017
Authors: Florina Daniela Ivan, Maria Butnaru, Liliana Verestiuc, Ionel Marcel Popa, Vera Balan
In order to study their chemical structure, the biodegradable scaffolds have been characterized by Fourier Transform Infrared Spectroscopy (FTIR).
Also, they must have suitable surface chemistry to facilitate cell attachment, proliferation and differentiation and should have a three dimensional structure with interconnected pores for cell growth and transport of nutrients and metabolic waste [4].
It has been observed in Fig.3 that all scaffold samples displayed a highly porous structure.
SEM micrographs of the scaffolds revealed a three-dimensional structure with interconnected pores, structure that include both calcium phosphate crystals and MNPs, homogenously distributed within the polymeric matrix. 3.2.
The morphology and the structure of the scaffolds are suitable for their future use in bone tissue engineering applications.
Online since: December 2016
Authors: Xiao Liu, Zi Ming Wang, Yun Sheng Zheng, Jia Nan Guan, Xiao Wei Ren
The results confirmed the occurrence of polymerization reaction and the ideal structure.
Based on the theory of molecular structure design, PCE structures are so designable that the researchers can obtain various PCEs with different structures by different unsaturated monomers according to different synthetic technologies.
Xiao Liu [7] synthesized a polycarboxylate superplasticizer with amide structure.
For concrete admixture researchers, it should be paid more attention to achieving PCE’s energy-saving synthesis based on the theory and technology of polymer chemistry.
Synthesis, characterization and performance of a polycarboxylate superplasticizer with amide structure, Colloids.
Online since: May 2013
Authors: Tokeer Ahmad, Sarvari Khatoon, Ruby Phul
All the reflections were matched with monophasic cubic CdO structure (JCPDS 75-0594) [55].
Alivisatos, Perspectives on the physical chemistry of semiconductor nanocrystals, J.
Surya, Magnetic properties of Mn doped ZnO tetrapod structures, Appl.
Tobin, Dopant ion size and electronic structure effects on transparent conducting oxides.
Systematics of dopant ionic radius and electronic structure effects on charge transport and band structure, J.
Online since: March 2026
Authors: Collins Madojemu, Abdullahi Hassan Ndanusa, Sani Sambo Datsugwai Mohammed, Gloria Ginikanwa Ezeagu
This inverse relationship is primarily attributed to thermal denaturation, which disrupts protein structures, and leaching, where water-soluble proteinsespecially albumins and globulins essential for amino acid availability are lost into the soaking medium.
The reduction in L-DOPA likely results from thermal decomposition of its phenyl ring structure, followed by leaching into the soaking medium.
Togun, Nutritional potential of underutilized legumes in Sub-Saharan Africa: A review, Food Chemistry 368 (2022) 130822
Daffodil, Antinutritional factors in legume seeds: Characteristics and determination, in: Encyclopedia of Food Chemistry, Elsevier, Oxford, 2022, pp. 238-249
Okafor, Protein loss in boiled African yam beans (Sphenostylis stenocarpa), Food Chemistry Advances 1 (2023) 100013
Online since: November 2016
Authors: Abolanle S. Adekunle, Diseko Boikanyo, Eno E. Ebenso
It is defect dependent and it is assigned to the defects and disorder in the carbon structure.
However in practice, the structure comprises stacks of graphene layers containing different numbers of atomic sheets to yield a three-dimensional structure.
Chemistry. 2013(2012).6 pages
In the Department Of Chemistry. 2013, University Of The Western Cape: Western Cape, Cape Town, Bellvile
Christian, Analytical chemistry, sixth edition, Wiley, 2004
Online since: July 2004
Authors: C. Marinescu, F. Maxim, S. Tanasescu
Thermodynamic Properties of Nano- and Micro- Structured PerovskiteType Compounds S.
Maxim Institute of Physical Chemistry "I.G.Murgulescu" of the Romanian Academy, Splaiul Independentei 202, 060041 Bucharest, Romania Keywords: Thermodynamic properties, nanostructured perovskite-type compounds Abstract.
For the Sr-doped compound, higher values of 2OΔH and 2OΔS are obtained, suggesting that the Sr 2+ ions can hold the perovskite-structure more effectively compared to Ca 2+ ions; that is the oxygen vacancies are more easily formed in the strontium doped lanthanum manganites than in the analogous calcium ones. 2 O 2 O2O STH G ∆−∆=∆ Compound 2OΔH [kJ mol-1] 2OΔS [kJ mol-1 K -1 ] La0.7Sr0.3MnO3 (temperature range 1073-1273 K) -304.6 ± 2.1 -0.112 ± 0.001 La0.7Ca0.3MnO3 (temperature range 1073-1273 K) - 505.3 ± 4.4 -0.255 ± 0.003 La0.67Ca0.33MnO3 (temperature range 1073-1173 K) -293.9 ± 3.5 -0.074 ± 0.003 La0.67Ca0.33MnO3 (temperature range 1173-1273 K) - 451.5 ± 5.4 -0.208 ± 0.004 La0.67Ca0.33Mn0.95Al0.05O3(temperature range1073-1173 K) -309.1 ± 8.5 -0.089 ± 0.005 La0.67Ca0.33Mn0.95Al0.05O3(temperature range 1173-1273K) -461.7 ± 8.6 -0.219 ± 0.011 La0.67Ca0.33Mn0.95Al0.05O3-δ (nanostructure)(after titration
Variation of 2O log p with temperature for doped lanthanum manganites prepared by conventional solid state reactions. 1050 1100 1150 1200 1250 1300 -240 -230 -220 -210 -200 -190 -180 -170 -160 T/K ∆∆∆∆GO2/kJ mol-1 La0.67Ca0.33Mn0.95Al0.05O3 La0.67Ca0.33MnO3 La0.70Ca0.30MnO3 La0.70Sr0.30MnO3 7.8 8.1 8.4 8.7 9.0 9.3 -11 -10 -9 -8 -7 -6 La0.67Ca0.33Mn0.95Al0.05O3 La0.67Ca0.33MnO3 La0.70Ca0.30MnO3 La0.70Sr0.30MnO3 104 (T/K)-1 log (pO2/atm)At the same concentration of the A-site dopant (33%), the 2OΔG and 2O log p values increase for the lanthanum manganite with Al as B-site dopant, while the 2OΔH and 2OΔS values for the same temperature decreased to a greater negative value, suggesting an increase in the binding energy of oxygen and an increase of order in the oxygen sublattice of the perovskite-type structure.