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Online since: July 2012
Authors: Yang Liu, Wei Gao, Qiang Wang
As part of our project on modeling the bimetallic complexes in biological processes, we have studied the chemistry of a series of nickel-thiolate-phosphine complexes while with particular interest on the reactivity of coordinated sulfur atoms and Ni-S bonds [4].
Crystal structure of the bimetallic complex is shown in Figure 2.
The V-shaped structure of this complex is in contrast with the planar structure of the complex [(dppe)Ni(µ-S(CH2)3NMe2)2Ni(dppe)][BPh4]2, in which the flattening of the NiS2Ni core lengthens the Ni…Ni distance to 3.310(1) Å [13].
Molecular structure of the cation in [(dppe)Ni(m-I)(m-pdt)Ni(dppe)]I Essentially no reaction was observed when a CH2Cl2 solution containing equivalent [Ni(pdt)(dppe)] and [FeCp(CO)2I] was stirred for 24 hours at room temperature.
The structure of the cation in [(dppe)Ni(µ-I)(µ-pdt)Ni(dppe)]PF6 is essentially the same as that in [(dppe)Ni(µ-I)( µ-pdt)Ni(dppe)]I and hence is not discussed here.
Online since: December 2012
Authors: Puteri S.M. Megat Yusoff, Norlaili Amir, Faiz Ahmad
A reinforced intumescent coating would have more compact cell structure and of higher strength.
A stiffer char will resist deformation to its structure harder and this was translated by smaller change in the height of the char.
The char structure was not suppressed and connected by fibres.
Bourbigot, "Multiscale Experimental Approach for Developing High-Performance Intumescent Coatings," Industrial & Engineering Chemistry Research vol. 45, pp. 4500-4508, 2006
Duquesne, "Fire Retardant Polymers: Recent Developments and Opportunities," Journal of Materials Chemistry, vol. 17, pp. 2283–2300, 2007
Online since: November 2024
Authors: Aunpada Limrueangamphon, Chonthichar Intachai, Kritsada Aopoom, Tinnathon Navanuch, Jantima Upan, Benjatham Sukkaneewat, Yutthana Wongnongwa, Nathapong Sukhawipat, Narongrit Sosa
The SEM images showed changes in the pore structure and morphology of the NRLF/AC composite with varying levels of AC content.
The NRLF native cell structure appeared as an open-cell configuration.
The observed changes indicate that the addition of AC contributes to a more intricate and porous foam structure.
This resulted in irregularities in the cell structure of NRLF, compromising its regular configuration.
Agglomeration might occur in clustered regions within the foam, affecting the uniformity of structure.
Online since: July 2021
Authors: Olga Skorodumova, Olena Tarakhno, Olena Chebotaryova, Fatih Mehmet Emen, Dmitriy Saveliev
Textile materials differ in composition, method of manufacture, structure and structure of fibers and threads, as well as the density and thickness of the fabrics, which affects the choice of fire protection [3].
It is established that the elasticity of coatings depends on the chemistry of their surface and is maximum under the conditions of the minimum number of active centers and uniform distribution of hydrophobic ethyl radicals on the surface of the gel coating.
An additional contribution to the concentration of ammonia is made by the decomposition of synthetic polyester fiber fabric containing amino groups in the polymer structure.
Examination of the structure of the impregnated samples after testing showed that the structure of the samples is not destroyed and dense.
Under the microscope there is a homogeneous structure of the sample with the addition of 20% DAHP (Fig. 3, (d)).
Online since: January 2025
Authors: Maulidan Firdaus, Muhamad Widyo Wartono, Diana Inas Utami, Uly Wulan Apriani, Soerya Dewi Marliyana
One of the factors determining the antibacterial activity of a compound is its structure.
Pandey, Chemistry and Biological Activities of Flavonoids : An Overview, Sci. 
Chen, L.Ren, Antibacterial Activities of Flavonoids: Structure- Activity Relationship and Mechanism, Curr.
Bi, Bioactive flavonoids in medicinal plants: Structure, activity and biological fate, Asian J. 
Smânia, Structure–activity relationship of antibacterial chalcones.
Online since: December 2011
Authors: Wen Quan Cui, Ying Hua Liang, Yue Li Qi, Jin Shan Hu
The structure of the photocatalyst was determined by means of powder X-ray diffraction, scanning electron microscope and UV-Vis spectroscopy.
K2La2Ti3O10 is a layered perovskite type oxide with peculiarly layered structures [3], which showed photocatalytic activity for hydrogen evolution[4].
The layered structure of K2La2Ti3O10 consists of La2Ti3O102- octahedral and K ions are located between two layers[5].
The sample which derived at 1000˚C for 2 h has the best crystallized structure.
Chinese Journal of Inorganic Chemistry, 2003, 19(11): 1217-1221.
Online since: September 2013
Authors: Wei Hong Li
The structure, surface morphology, and some properties of these PLGA/MWNTs/HA composites were evaluated.
An ideal scaffold should meet a series of requirements [2–5], for example, it should present a porous three-dimensional (3D) structure and encourage cell attachment, proliferation, differentiation, and so on.
For example, although synthetic polymers such as poly (lactic-co-glycolic acid) (PLGA) and poly(lactic acid) (PLGA) have proper degradation rate and can be easily processed into different forms and structures, they usually exhibit poor mechanical property.
Briefly, 1wt% HA nanoparticles (Chengdu Zuoxin Biomaterials Company, Chengdu), 0.5wt% and 1wt% MWNTs (Chengdu Organic Chemistry Co.
The construct was then immersed in water (2 ml) for 24 h to leach the sucrose to produce the porous structure.
Online since: June 2013
Authors: Mao Lin Zhang, Tao Ning, Yong Shun Qi
X-ray diffraction (XRD) and scanning electron microscope (SEM) were used to characterize the crystal structure and grain size of the prepared materials.
The crystalline structure of the sensing materials were characterized by X-ray diffraction (XRD, D/MAX-2400, Rigaku, Japan) at room temperature.
The micro structure analysis of the tin oxide films with varying Li concentrations were shown in Fig. 2.
X-ray diffraction results showed that Li+ ion may substitute for the sites of Sn4+ and forms the structure of Sn1-xLixO2.
Mulla: Materials Chemistry and Physics Vol. 109 (2008), p. 230
Online since: January 2013
Authors: Gao Shuo
A quantitative structure-property relationship (QSPR) study was used for prediction of impact sensitivity of some nitro compounds.
Cherville, Relation entre la Structure Electronique et la Sensibilité au Choc des Explosifs Secondaires Nitrés-Critère Moléculaire de Sensibilité.
Cherville, Relation entre La Structure Electronique et la Sensibilité au Choc des Explosifs Secondaires Nitrés.
Leszczynski: Computational Chemistry: Reviews of Current Trends (World Scientific, River Edge NJ 1999) [9] P.
Adolph, The relationship of Impact Sensitivity with Structure of Organic High Explosives.
Online since: July 2011
Authors: Ying Chen, Bao Hui Wang, Xue Sun, Hui Li
The Effect of rare earth modification on the structure and catalytic performance of SO42-/ZrO2 solid acid catalysts Ying Chen 1,a, Baohui Wang1,b,*, Xue Sun2, Hui Li3 1College of Chemistry and Chemical Engineering, Northeast Petroleum University, Daqing 163318, Heilongjiang, China 2PetroChina Daqing Oilfield, Daqing 163318, Heilongjiang, China 3Daqing Petrochemical Engineering Co.
As Figure 2 presents, when roasting temperature is 550℃, catalyst crystallization rate is not high, whose ZrO2 crystalline phase is basically amorphous structure.
This elucidates that activation temperature will not change solid superacid’s key structure.
It indicates that acid catalyst structure becomes more stable and the acidic strength increases along with the increase of temperature.
This is because superacid center structure has been damaged in the temperature.