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This has been achieved through chemical bleaching, which involves the use of chemicals such as chlorine gas, chlorine dioxide, and alkalis to dissolve lignin in pulp and to release the chromophoric groups and other colored substances by completely destroying the lignin structure [1].
Miller, Use of dinitrosalicylic acid reagent for determination of reducing sugar,Analytical Chemistry 31(3) (1959) 426-428

Photochromism and Optical Recording of a Novel Photochromic Diarylethene Material bearing a Phenanthrenyl Unit Junjie Song, Gang Liu* and Renjie Wang Jiangxi Key Lab of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, China liugang0926@163.com Keywords: Photochromism, Optical storage, Fluorescence, Phenanthrene Abstract.
The structures of diarylethene 1a were confirmed by 1H NMR (400 MHz, CDCl3, TMS): δ 2.039 (s, 3H, -CH3), 2.300 (s, 3H, -CH3), 7.250(s, 1H, thiophene-H), 7.769 (s, 1H, phenanthrene-H ), 7.575-7.625 (t, 2H, phenanthrene-H), 7.672-7.692 (t, 2H, phenanthrene-H), 7.878-7.896 (d, 1H, phenanthrene-H), 8.015-8.036 (d, 1H, phenanthrene-H), 8.685-8.706 (d, 1H, phenanthrene-H), 8.748-8.767 (d, 1H, phenanthrene-H), 7.312 (t, 2H, benzofuran -H), 7.462 (d, 1H, benzofuran -H), 7.482 (d, 1H, benzofuran -H).

The simulation included optical effects, like Rayleigh scattering, absorption and re-emission, and reflections on cathodes and on the spherical steel structure.
Coleman, in: Principles and Applications of Positron and Positronium Chemistry , edited Y.C.

Their results showed that striation formation in crystals can be caused not only by the variations of the external growth conditions, but also by the action of some ‘internal’ factors such as the variations in the dislocation structure of the crystal and modification of the growth-step distribution on the growing faces.
Gronkowski, E.Wierzbicka, M.Lefeld-Sosnowska, J.Borowski, J.H¨artwig: Radiation Physics and Chemistry, vol. 78 (2009), p.

Efficient Synthesis of a New Unsymmetrical Photochromic Diarylethene for Optical Recording Storage Taofeng Wang, Gang Liu*, Shiqiang Cui Jiangxi Key Laboratory of Organic Chemistry, Jiangxi Science and Technology Normal University, Nanchang 330013, P.
The structure of 1a was characterized by 1H NMR (400 MHz, CDCl3, TMS): δ 1.81 (s, 1H, -OH), 2.00 (s, 3H, -CH3), 2.29 (s, 3H, -CH3), 4.78 (d, 2H, -CH2), 6.82 (d, 1H, J = 8.0 Hz), 7.13-7.25 (m, 2H), 7.35 (m, 2H).

The oganize and the structure chang along with the adding of Sr, The performance testing, More investigation in this field have to do.
Vol.41 (2005) p.841 [7] А.И.Ведяев.: Physical chemistry of molten salt.

Decolorization Effect of Mycelium Pellet on Saline Azo Dye Wastewater Zeng Jianzhong 1, Lin Junyue 2a , Zhou Song 3,yi xiuguang2,Zeng Shisheng 1 1 College of Life Sciences of Jinggangshan University, 343009 Jian, Jiangxi，china 2 College of Chemistry & Chemical Engineering of Jinggangshan University, 343009 Jian, Jiangxi,china 3Scientific Research Department of Jinggangshan University, 343009 Jian, Jiangxi，china alinjunyue1@163.com Corresponding author：Lin Junyue，E-mail: linjunyue1@163.com Tel:13979656845 Keywords: Mycelium Pellet.
Conclusion 1) After the observation of morphological features and comparison of conidial structures of model strains under a microscope, the bacterial strain was initially determined to be fungus.

Some main strong peaks in these spectra agree well with (110), (104), (114), (212), (213) and (216) strong diffraction peaks of ettringite structure and their intensity increase steadily with curing time, which indicate that ettringite crystals are emerged and its quantities growth dramatically during 3-day to 14-day.
Hewlett (Ed.), Lea’s Chemistry of Cement and Concrete, 4th ed., Wiley, New York, （1998） [4] W.

Fabricated gas sensor showing a) silicon wafer and b) electrode structure and interface of 5 devices.
Xiandeng, Atomic spectrometric detectors for gas chromatography, TrAC Trends in Analytical Chemistry, 77 ( 2016 ) 139–155

Moreover the bringing foreign ions may probably located in the forbidden zone of TiO2, which changes the energy level structure of the semiconductor crystal and finally shorten the absorptionoptical wavelength range .
References [1] Weidong Zhang, Min Guo, Aihua Yan, CHINA COALBED METHANE, June 2010 , Vol7 No.3 [2] Maoyuan Sun, China Energy Sources2002, Vol.11 [3] Jingui Lin, SCIENCE & TECHNOLOGY INFORMATION, 2006, No.7 [4] Pengkang Jin, Wenyan Zhang, et.al., Environment Chemistry, 2008,27(2):202-205