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Then the crude was subject to silica gel CC to afford Compound 2(393mg), 3(168mg), 4(13mg), 5(83mg), 6(22mg) on elution with petroleum ether/EtOAc (90:10-60:40), Chemical structures of the products were determined by means of spectral data and mentioned in respective order.
The structures of Progesterone (1) and the biotransformed products 11α-hydroxyl pregesterone(2), 11α,15β–dihydroxypregesterone(3), 11α-dihydroxypreg-1,4-dien-3,20-dione (4), 6β,15β– dihydroxypregesterone (5), 7β,15β– dihydroxypregesterone (6).
It unequivocally confirms the structure of 11α-hydroxyprogesterone [13, 14]. 11α,15β-dihydroxyprogesterone (3) Crystallized from methanol; m.p.: 163-165ºC; UV (MeOH): λmax nm (loge) 241 (5.2); IR (KBr), νmax: 3453，3132，2361，1652，1456，1128 cm-1. 1H NMR (CDCl3，400 MHz，δ in ppm，multi.
Tan, Chemistry of Natural Compounds Vol. 48 (2013), p. 938 [13] K.

Preparation and Gas-sensing Property of Coppertetra-iso-propoxyphthalocyanine Spin-coating Film Qiang Li1, a, Lihua Huo1, b, Shan Gao1, c, Xiaojuan Qi1, d and Hui Zhao1, e 1Key Laboratory of Functional Inorganic Material Chemistry (Heilongjiang University) Ministry of Education, Harbin, 150080, China ahematite1211@yahoo.com.cn, blhhuo68@yahoo.com, cshangao67@yahoo.com, dxjqilab2008@yahoo.com.cn, ezhaohui98@yahoo.com Keywords: Copper Phthalocyanine, Spin-Coating Film, Gas-Sensing Property Abstract.
Introduction Phthalocyanines, with excellent thermal and chemical stability due to its special macro-cycle conjugation structure, have received extensive research and used in such many aspects as dye, photocatalysis, medical science, organic semiconductor, sensor, photoelectricity, etc. [1, 2].
The chemical structure is shown in Fig. 1.
Fig. 1 The chemical structure of copper phthalocyanine derivative Experimental details The surface morphologies of the spin-coating films prepared on mica with different concentration of i-pro-CuPc are shown in Fig. 2.

Primary structure degradation was evaluated by means of SDS-PAGE.
This means that the primary structure of the protein has been modified, not that the compound has been completely fragmented.
This measurement showed that the treatment has a significant effect on the primary structure of a protein which may be seen as a model for the chemical environment of a living cell.
Kogelschatz, Dielectric-Barrier Discharges: Their History, Discharge Physics, and Industrial Applications, Plasma Chemistry and Plasma Processing. 23 (2003) 1-46

The Influence of Electrospark and Laser Treatment upon Corrosive Resistance of Carbon Steel SCENDO Mieczyslaw1,a, RADEK Norbert2,b, TRELA Joanna1,c 1Institute of Chemistry, Jan Kochanowski University in Kielce, Swietokrzyska 15G, 25-406 Kielce, Poland 2Centre for Laser Technologies of Metals, University of Technology in Kielce, 1000-lecia Panstwa Polskiego 7, 25-314 Kielce, Poland Keywords: C45 carbon steel; electrospark deposition; WC-Cu coating; laser treatment; corrosion rate.
The laser irradiation leads to the homogenization of the coating, chemical composition, structure refinement, and crystallization of supersaturated phases due to the occurrence of temperature gradients and high cooling rate.
The laser treatment causes the homogenization of the chemical composition, the structure refinement and the healing of microcracks and pores of the ESD coatings. 5.
Petrzhik, Electrospark coatings deposited onto an Armco iron substrate with nano- and microstructured WC–Co electrodes: Deposition process, structure, and properties, Surf.

Smoothness depends not only on the absence of structure defects in the metal film but also on the value of mechanical stress in the film [13–17].
Internal strains and insufficient adhesion of films to a supporting structure can be called the reasons of these defects occurrence.
Akhmetov, Current Questions in the Course of Inorganic Chemistry, Kn. for teachers, Prosveschenie, Мoscow, 1991
Drüsedau, The influence of argon pressure on the structure of sputtered molybdenum: From porous amorphous to a new type of highly textured film, Journal of Applied Physics. 80 (1996) 6266-6273

Fig.1 Example of whiskers that have grown from a tin-plated brass component Background Investigations into whisker growth date back at least 50 years [1] and have established a number of conditions relating to their growth: • Whiskers are single crystals of normal (tetragonal) tin structure [2]
Figure 2 shows the long axes in the unit triangle for the (tetragonal) tin crystal structure.
A similar structure was reported recently [12] in a whisker sectioned by focussed ion beam machining.
K.N.Tu, Materials Chemistry and Physics Vol. 46 (1996), p. 217. 17.

A simplified black-box model was presented in [8], and the structure of the model is shown in Fig. 2.
Fig.2 Structure of the model The model is described by (6) Where,, are the Polynomial of shift operator , (7) and the parameters , , to be identified. e(k) is the internal and external perturbation generated or entering the systems at some point and affecting the behavior from that point to the output.
[2] Min Xu, Shaoyuan Li, and Wenjian Cai, Practical receding-horizon optimization control of the air handling unit in HVAC Systems, Industrial & Engineering Chemistry Research 44 (2005) 2848-2855
[3] Min Xu, Shaoyuan Li, Wenjian Cai, and Lu Lu, Effects of a GPC-PID control strategy with hierarchical structure for a cooling coil unit, Energy Conversion and Management 47 (2006) 132-145

Preparation of Crude Oil Flow Improver from Vegetable Oil and the Performance Evaluation Xu Jingfang1,2,a, Guo Zhen1,b, Zhang Fawang3,c, Wang Dachuang3,d, Wang Zhen4,e, Zhang Yongming4,f and Chen Gang1,5,g* 1College of Chemistry and Chemical Engineering, Xi’an Shiyou University, Xi’an, 710065, China 2Shaanxi Province Key Laboratory of Environmental Pollution Control and Reservoir Protection Technology of Oilfields, Xi’an, 710065, China 3Oil Production Plant No. 11, PetroChina Changqing Oilfield Company, Xi’an, 710200, China 4School of Science, Xijing University, Xi’an, 710123, China 5State Key Laboratory of Petroleum Pollution Control, CNPC Research Institute of Safety and Environmental Technology, Beijing, 102206, China a3067516420@qq.com, b2401130482@qq.com, c381875820@qq.com, d89985945@qq.com, e1427133955@qq.com, f124843789@qq.com, ggangchen@xsyu.edu.cn Keywords: vegetable oil; hydroxylmethyl pentamine; crude oil; flow improver; paraffin Abstract.
The waxes generally crystallize as an interlocking network of fine sheets, thereby entrapping the remaining fuel in cage-like structures.
Resins and asphaltenes are not isolated in crude oil, and the two unit structure is similar to that of asphaltenes is a further aggregate of colloids.
Xu, Study on the relationship between the structure and activities of alkyl methacrylate-maleic anhydride polymers as cold flow improvers in diesel fuels, Fuel Process.

Study of Local Mechanical Properties of Fe78Al22 Alloy Vilma Buršíková1,a*, Vojtěch Homola1, Yvonna Jirásková2, Naděžda Pizúrová2, Ivana Miháliková2, Martin Friák2, Nikola Koutná2, Anton Slávik2, David Holec3, Mojmír Šob 4,2,5 1Department of Physical Electronics, Faculty of Science, Masaryk University, Kotlářská 2, CZ-61137 Brno, Czech Republic 2Institute of Physics of Materials, Czech Academy of Sciences, Žižkova 22, CZ-61662 Brno, Czech Republic 3Department of Physical Metallurgy and Materials Testing, Montanuniversität Leoben, Franz-Josef-Strasse 18, A-8700 Leoben, Austria 4Central European Institute of Technology, CEITEC MU, Masaryk University, Kamenice 5, 62500 Brno, Czech Republic 5Department of Chemistry, Faculty of Science, Masaryk University, Kotlářská 2, 61137 Brno, Czech Republic avilmab@physics.muni.cz, Keywords: nanoindentation, Fe78Al22, hardness, elastic modulus, mechanical property mapping, quantum-mechanical calculation, electron
Mechanical property mapping using micro- and nanoindentation tests is an excellent tool to study the effect of crystal structure on local indentation response of the studied alloys [4-6].
Structure and chemical composition.
Knowing the preference of Al atoms not to be mutually the first nearest neighbors (see, for example, our papers [16, 17]) we have distributed Al atoms so that they are mutually second or higher neighbors but otherwise their distribution is according to the special quasi-random structure (SQS) concept [18] and was generated by the USPEX code [19-21].

Papynov1,2,c 1Far Eastern Federal University, 690090, Vladivostok, Russia 2Institute of Chemistry, Far Eastern Branch of Russian Academy of Sciences, 690022, Vladivostok, Russia aZav_Alexey@list.ru, bNPShapkin@gmail.com, cPapynov@mail.ru Keywords: spark plasma sintering, SPS, silicon carbide, SiC, rice husk processing, ultra-high temperature ceramic, UHTC, reaction sintering.
The microphoto and Raman specters The investigation of the ceramic sample chip by the scanning electron microscopy method makes it possible to improve the structure understanding (Fig. 3).
The microstructure is a region with a SiC grain structure, as evidenced by local elemental analysis, coexisting with unreacted carbon residues (Fig. 3a).
The grains are represented both as fairly "loose" agglomerates (Fig. 3b) and as the part of larger monolithic structures (Fig. 3c).