Search results

Introduction Molecular Imprinting Techniques, known as the molecular template technique, is a new type of experimental technique which combined with polymer science, material science, biochemistry, chemical engineering discipline and organic chemistry to get the molecular polymer on the space structure and the binding site with the template exactly matches (Molecular Imprinted Polymers, MIPs) [1].The basic of theories are the Fischer’s enzyme, the “Lock and key model” substrate effects, the antibody formation theory made by Pauling, and Dickeyde’s the “specific adsorption theory”.
In 1972, based on the characteristics of the selective of molecular shape and spatial structure of enzyme and antibody, Wulff and others [2] developed separation of molecular imprinting polymers.
Thus, it has been increasingly widely used in the fields of biology, chemistry, medicine and shows good prospects.
Third, Imprinted polymer of "imprinting" capacity is low, because the binding is often buried in the three dimensional structure of the polymer that are not being fully utilized.
Chinese Jouranl of Applied Chemistry, 2005, 22(7): 740-742

Both Circular and peach chamber have different internal flow field because they are different in its chamber structure.
Peach chamber axial force is significantly greater than the circular chamber and the influence degree of chamber structure on the axial force decreases with the increase of the speed ratio.
Beijin: Chemistry Industry Press, 2006
Beijin: Chemistry Industry Press, 2008
Beijin: Chemistry Industry Press, 2004

Synthesis and Characterization of Bone Cement (Hydroxyapatite base) calcinated at 900°C and loading the Silver Nanoparticles on it H.R.Ebrahimi1, a, M.Eslami2, b 1,2 Department of Chemistry, Majlesi Branch, Islamic Azad University, Isfahan, Iran a hebrahimi2010@gmail.com , b marjan_eslamii@yahoo.com Keywords: Bioceramics; Calcium Hydroxyapatite; Silver Nanoparticles; Synthetic Body Fluid Abstract.
The formations of the silver nanoparticles on the HAP structure were confirmed by X-ray diffraction, transmission electron microscopy (TEM).
Results and discussion XRD measurements of all samples were carried out, to examine the structure and also estimate the mean silver particle size.
The HA powders also contained trace amounts of other inorganic ions, provided and incorporated into the HA structure by the SBF solution used.
Beteshobabrud, Radiation Physics and Chemistry Vol.77, (2008), p.1074 [23] Kokubo T,.

Moreover, the carboxyl content on the surface of PS-PMA membranes was also determined as well as the specific surface area in order to study the structure-properties relationships.
Among these QCM sensors, electrospinning nanofibrous/QCM combination system was regarded as a promising technique due to the large surface to volume ratio and 3D structure of nanofibers.
The image of nanofibrous membrane showed 3D structure of nanofibers and nanofibrous network with random fiber orientation.
Yang, et al: Materials Chemistry and Physics Vol.81 (2003), p. 126
Legendre: Analytical Chemistry Vol. 24 (1952), p. 1942.

Chinese Journal of Chemistry Vol. 27 (2009), p. 369
Grimes, in: The Inorganic Chemistry of Tin, edited by P.G.
Harrison, Chemistry of Tin, chapter 4, Chapman and Hall (1989)
Harrison, in The Inorganic Chemistry of Tin, edited by P.G.
Harrison, Chemistry of Tin, chapter 3, Chapman and Hall (1989)

At high temperature, Nb5+ donor ion maybe involved in two defect chemistry reactions and made TiO2 grains semiconduting.
Two defect chemistry reactions were Eqs. (2) and (3).
A overtop sintering temperature induced barrier structure changing.
Barrier structure changes were embodied in barrier width XD broadening.
(2) Sintering temperature has obvious effects on barrier structure.

The structure of the products was confirmed by NMR, IR, GC-MS and Roman analysis.
The chemical structure of the target product can be speculated through the data obtained.
The IR characteristic peaks of functional groups, chemical structure, types of isomers were determined.
J., Structure of main component in perfume ‘ISO-E-SUPER’.
J., Myrcene as a Natural Base Chemical in Sustainable Chemistry: A Critical Review.

Use of Retorted Shale as Sulfur Adsorbent Rodolfo Luiz Bezerra de Araújo Medeiros1,a*, Maria de Fátima Dantas e Silva1,b, Rodrigo César Santiago2,c, Gilvan Pereira de Figueredo3,4,d, Heloísa Pimenta de Macêdo1,e, Marcus Antônio de Freitas Melo1,5 and Dulce Maria de Araújo Melo1,3,g 1Postgraduate Program in Science and Engineering of Materials, UFRN, Natal, RN, Brazil. 2Department of Environmental Sciences and Technology, UFERSA, Mossoró, RN, Brazil. 3Postgraduate Program in Chemistry, UFRN, Natal, RN, Brazil. 4Department of Chemistry, IFMA, São Luís, MA, Brazil. 5Postgraduate Program in Chemical Engineering, UFRN, Natal, RN, Brazil.
The results showed that both methods significantly altered the structure of the retorted shale, mainly the amount of Fe2O3.
The adsorbents prepared were characterized by X-ray diffraction (XRD) and scanning electron microscopy (SEM) to investigate, respectively, the crystalline structure and morphology.
(Royal Society of Chemistry, 2008).

Synthesis and Properties of A Novel Environmentally Friendly Phase Change Energy Storage Coating Additive Peng Fu1, a, Peng Xi1, 2, b, Fulai Zhao1, c and Bowen Cheng1, d 1 Tianjin Municipal Key Lab of Fiber Modification and Functional Fiber, Tianjin Polytechnic University, 300387 Tianjin, China 2 State Key laboratory of Polymer Physics and Chemistry, Institute of Chemistry, Chinese Academy of Sciences, 100080 Beijing, China a2007203600@163.com, b xipeng@tjpu.edu.cn, cialufhz@163.com, dbowen15@tjpu.edu.cn Keywords: polyethylene glycol, water-soluble, phase change, coating additive Abstract.
The crystal structure is characterized by XRD, and the phase change unit is PEG.
In this paper, we synthesized a novel waterborne PU with partly branched structures, via two-step synthetic method, using MDI and PEG2000 as reagent and a new kind of aromatic tetrahydroxycompound (ATTC) synthesized by ourselves as branched units (or chain extenders).
From Fig.5, we could clearly observe that the PCM and pure PEG2000 both have two main diffraction peaks at 19.1° and 23.3°, which indicates that PCM coating additive has the same crystal structure and cell type with PEG.

The Morphology and structure of nanoparticles were analyzed by transmission electron microscopy (TEM) and X-ray diffraction (XRD).
The morphology and structure of Cu-ZnO nanoparticles were characterized by TEM (JEM-100) and X-ray diffraction (Philips X’Pert Pro).
Fig. 2 compares the XRD patterns of Cu-ZnO nanoparticles with the hexagonal wurtzite structure of ZnO (JCPDS card No. 36-1451).
All the observed diffraction peaks of samples correspond to the hexagonal wurtzite structure of ZnO (JCPDS card No. 36-1451).
Sun, G.H Yang and Q.X Ma: Journal of Materials Chemistry A. 2014