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Methods.The crystal structure and average particle diameter of the nano-copper oxide were identified by a type X-ray diffractometer (XRD-6000) with a Cu Kα radiation source (λ=0.154056 nm), a tube voltage of 40 kV and a tube current of 30 mA.
The desulfurization activity of nano-copper oxide prepared by other methods. 1) The breakthrough time curve of nano-copper oxide: There are many methods to prepare nano-copper oxide, and each method obtain the material structure has slightly different, this section select sol-gel method and hydrothermal method to prepare nano-copper oxide and compared with the complexation precipitation method with H2S removal performance as a target.
Correlation of Nano-Ce-ZnO Structure with its Desulfurizing Performance at Ambient Temperature[J].
Chinese Journal of Inorganic Chemistry 26(2):115-118(2006)
Role of Pore Structure of Activated Carbon Fibers in The Catalytic Oxidation of H2S[J].

Basic “composition – structure – biological response” regularities are still not revealed.
The influence of conditions under which complex system was formed on the physical and chemical properties and structure of films is not established yet.
Calcium phosphate cements for bone substitution: Chemistry, handling and mechanical properties.
Relation between aggregation and heterogeneity of obtained structure in sol-gel derived CaO – P2O5 – SiO2.
Solutions able to reproduce in vivo surface – structure changes in bioactive glass – ceramic.

Synthesis and characterization of LiFePO4 / PPy composite powders Xiang-zhong Ren*,Xi Li, Pei-xin Zhang, Jian-hong Liu, Qian-ling Zhang, and Zhong-kuan Luo School of chemistry and chemical engineering, Shenzhen University, Shenzhen 518060,China *renxz409@163.com Keywords: LiFePO4 , Polypyrrole , Lithium ion battery , doping , composite powders Abstract: A series of lithium iron phosphate /polypyrrole (LiFePO4/PPy) composite powders were synthesized by chemical oxidation method with different doping agent and oxidation agent.
LiFePO4 cathode material with a structure of olivine-type has been used in power battery field due to its low cost, non-toxicity, environmental friendliness, wide range source and high theoretical capacity of 170 mAh/g with a flat charge/discharge potential at 3.4 V versus lithium owing to the Fe 2+/ Fe 3+ redox couple.
The final products were then filtered, washed with deionized water, and dried at 70°C in a vacuum oven for 24h. 2.2 Measurements The crystal structure of the LiFePO4/PPy composites was evaluated by X-ray diffraction methods (XRD) using Cu Kα radiation (BRUKER D8 ADVANCE, Germany).The X-ray diffraction data were collected in the angle interval from 10° to 70° (2θ) at steps of 0.02° (2θ).
All the patterns can be indexed to a single-phase material having an orthorhombic olivine-type structure (space group Pmnb), which are the same as the standard value (FCPDS card).
The structure of LiFePO4 synthesized by solid state method can be estimated through FTIR.

The purpose of pretreatment is to remove some or all of the lignin, or change the physical and chemical structure of cellulosic feedstocks to some extent, such as reduced crystallinity, increased porosity and surface area, so as to promote the enzyme and substrate contacts, and enhance the hydrolysis rate and the sugar rate and reduce costs [13].
It is also reports that the cellulose structure of recycled paper has changed by ultrasonic pretreatment, and this structural change will be conducive to convert cellulose into ethanol during the process of fermentation [20].
Fig. 2 (a) is SEM photographs of corn stalk after 3h of hydrolysis without pretreatment, we can see that the straw surface is very smooth and almost no porous structure there, the sugar rate is 11%.
As Fig. 3 (b), in 190°C of heating and 15min of pretreatment, and then hydrolysis 3h, we can observed that a lot of porous structure appeared in straw surface, and the sugar rate increased to 40% [14, 21].
Cheong et al: Chemistry, Vol. 1 (2008) No.5, pp.11-17

The preparing method, structure, morphology and properties of CR/VerNs had been studied by XRD, TEM, electron pull machine, sclerometer, super-high megohmmeter.
The vermiculite structure in nanocomposites was tested by XRD (model D/max-rA) with Cu Kα radiation ( λ=0.154nm, voltage=40kV�current=100mA), 2θ from 1.5° to 30°.
This made some O-Ver structure come back to original state, so characteristic peak of vermiculite appeared at about 2θ=6.1°.
The increased properties of CR/VerNs should be ascribed to the homogeneously dispersed structure of the vermiculite nanoscale scraps in the CR matrix, which were entangled with the rubber molecules, equal to increasing the number of joining points of the rubber molecules.
Chemistry Industry Press, Beijing, 2002, p.9.

The Degradation of Poly(Butylene Succinate)/Natural Rubber Composites Li Gao1,2,a, Erjuan Zhi1,2 ,b, Pingli Wang*2,c , Junhui Ji *2,d 1Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing 100190, China 2University of Chinese Academy of Sciences, Beijing 100049, China agaoxin130@163.com, bzhiej86@126.com, cpingliwang@mail.ipc.ac.cn, d jhji@mail.ipc.ac.cn Keywords: Biodegradability; Poly (butylene succinate) (PBS); Nature rubber; Composites Abstract.
The chemical structure of the repeat unit is –[O–(CH2)m–O–CO–(CH2)n–CO]N–.
As shown by the experimental results, the addition of NR into PBS may change the tight structure of PBS film, resulting in quicker biodegradation than pure PBS.
As shown by the experimental results, the addition of NR into PBS may change the tight structure of PBS film, resulting in quicker biodegradation than pure PBS.
At concentrations of NR increasing, X-ray results indicate that the presence of NR does not change the crystal structure of PBS.

Introduction Physical modification of the existing polymers, their combination with materials of different nature and structure with the aim of attributing a specific set of qualities to a polymer which would be dependent on the type of the inclusion represents one of the promising ways to solve the problem of production of new polymer materials – the so-called polymer composite materials (PCM).
Thus, in [11] it is shown that the increase of the inclusion content could results in the origin of an additional instability mechanism of the electrets state – orientation in the intrinsic field of the homocharge of polar structures which are created by the introduction of the inclusion ( for example, of groups Si-OH when aerosil is introduced into LDPE).
Temnov, Specification of molecular and supramolecular structure of film and fibre electrsts on the basis of low density polyethylene by means of IR spectroscopy and refractometry, Izvestia:Herzen Unversity Journal: nature and science. 64 (2008) 50-56
Zatsepina, Physical properties and structure of water, Moscow State University, Moscow, (1998)
Fadeev, Chemistry of fused surface composits, Fizmatlit, Moscow, (2003)

In chemistry, activation energy means the amount of energy that is required to activate atoms or molecules to a condition in which they can undergo chemical transformation or physical transport.
This can be caused by the structure of acidophilus milk.
Values of dynamic viscosity are influenced by other factors, i.e. by the amount of fat content (for milk) and also by structure (acidophilus milk) in this case.
Higher values of fat content caused higher values of dynamic viscosity, and a denser structure of sample caused an increase of dynamic viscosity.
This can be caused by the structure of acidophilus milk.

A New Organic-inorganic Hybrid Based on L-arginine and Polyoxoanion Qiong Wu1, Jing Lu1, Xiaolin Ji3,4, Taoyu Zou3,4, Zhenfang Qiao3,4, Hongping Ju2a*, Hai Wang,4b* 1Department of Chemistry, Kunming University, Yunnan, Kunming 65214, PR China 2Department of medicine, Kunming University, Yunnan, Kunming 65214, PR China 3College of physics and science technology, Yunnan University, Kunming, 650091, P.
In this field, Polyoxometalates (POMs), as unique inorganic metal-oxo clusters with versatile structures, shapes, charges and sizes, have been used as excellent inorganic electron-donor ligands to assemble various organic-inorganic hybrid compounds with different applications.
The CCDC reference numbers for the title compound is 796461 Results and discussion Structure description.
Fig. 1 Ball and stick illustrations the fundamental structure of compound 1, free water molecules are omitted for clarity.
Notablely, arginine molcueles also play an important role in stabilizing the crystal structure of compound 1 via the multiple hydrogen-bonding.

The basic structures of Crinum Asiaticum alkaloids are N-(3, 4-dioxo-benzyl)-4-O- phenylethylamine, pyrrole phenanthridine, 5,10b-ethanophenanthridine.
The Chemistry Research of Crinum Asiaticum Alkaloids For Crinum Asiaticum (Crinum asiaticum L.var.sinicum Bak.), one of the earliest records appear in the "Supplement to Compendium of Materia Medica", is Amaryllidaceae Crinum Asiaticum genus perennial herb.
Xianhui Jia mentions in his article in the 5-lobethanophenanthridine structure with α structure Crinum Asiaticum amines, having antimalarial activity.
This is consistent with the proposal that Hu Zheng [13] suggests the molecule N-O-O triangular structure is related to antitumor activity.
Conclusions In recent years, through the experiment studies have identified three basic Crinum Asiaticum alkaloids skeleton and through a variety of reactions to form the nucleus of nine structures, determination of the Crinum Asiaticum alkaloids chemical structure, laying the foundation for further study.