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Zhang J.,Tianjin University | Qu H.,Tianjin University | Zhang Z.,Tianjin University | Zhou L.,Tianjin Cement Industry Design and Research Institute Co.
Acta Crystallographica Section E: Structure Reports Online | Year: 2011

In the title compound, C 30H 38O 4Si 2, the two phenyl rings are twisted away from the central benzene ring by 70.28 (8) and 67.42 (7)°. The two Si atoms attached to the benzene ring deviate in opposite directions from the ring plane by 0.258 (3) and 0.206 (3) Å, respectively. One ethyl group is disordered over two conformations in a 0.568 (5):0.432 (5) ratio. The crystal packing exhibits weak inter-molecular C - H⋯O inter-actions. © Zhang et al. 2011. Source


Zhu Y.,University of Jinan | Li B.,Tianjin Cement Industry Design and Research Institute Co. | Yin H.,University of Jinan | Ge S.,Shandong University | Yu J.,Shandong University
Monatshefte fur Chemie | Year: 2014

The interaction between a series of rhodanine derivatives with different substituent groups and bovine serum albumin (BSA) was studied using fluorescence quenching spectra, which showed that the type of quenching of BSA by rhodanine derivatives was static in each case. Binding constants, binding site numbers, action distances, and energy transfer efficiencies between donor (BSA) and acceptors (rhodanine derivatives) were calculated and showed that introduction of -NO2 (electron-withdrawing group) is more favorable for rhodanine-BSA interaction than that of -CH3 and -OCH3 (electron-donating groups). Finally, strength of interaction between rhodanine derivatives and BSA was simulated theoretically using quantum chemistry and showed that introduction of groups with small steric hindrance is beneficial to promote the interaction. These investigations are very important to simulate the interaction of small molecules with biomacromolecules and to synthesize drug molecules that interact with protein easily. Graphical abstract: [Figure not available: see fulltext.] © 2013 Springer-Verlag Wien. Source


Liu J.,Tianjin University | Li W.,Tianjin University | Li W.,Tianjin Cement Industry Design and Research Institute Co. | Wang B.,Tianjin University
Energy and Buildings | Year: 2010

The energy recovery ventilator (ERV) is an effective method, which can transfer heat and moisture from the exhaust air into the outdoor fresh air to save energy in buildings. Nowadays, ERV has been widely used in the commercial, industrial and residential buildings in China. Its energy saving performance depends on a lot of factors, such as the outdoor environmental conditions, the enthalpy efficiency of the exchanger, and so on. Based on the relationship among sensible heat, latent heat and enthalpy efficiency, we analyzed the weighted coefficient equations for describing the performance of ERV in different climatic zones in China. According to China weather data, enthalpy efficiency of the exchanger mainly depends on sensible heat efficiency in winter and latent heat efficiency in summer. The energy simulations of a sample apartment in a residential building were made under different operation conditions to study the performance of ERV. The energy saving performances of the ERV were studied with five different outdoor climatic conditions, the enthalpy efficiency, fan power consumption of ERV and fresh air change rate. To improve energy saving performance, better efficient enthalpy exchange material and higher effiencient fans must be explored, while reasonable fresh air change rate as well as proper operation period according to local climate should also be carefully considered. © 2009 Elsevier B.V. All rights reserved. Source


Bian H.-M.,Harbin Institute of Technology | Bian H.-M.,Hebei University of Technology | Yang Y.,Harbin Institute of Technology | Yang Y.,Tianjin Cement Industry Design and Research Institute Co. | And 2 more authors.
Powder Technology | Year: 2012

Nanostructured Al 2O 3-13wt.%TiO 2 composite powders were successfully prepared by spray drying, heat treatment and plasma treatment. The as-prepared composite powders were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy, respectively. The tap density and flowability were measured by tap density instrument and hall flowmeter, respectively. The results showed that the minimum water content of the slurry suitable for spray drying was 47wt.%, and the corresponding spray dried powders had the maximum density and flowability. Spherical and porous powders had been obtained by spray drying technology. The sphericity of the particles and the pores in the particles were decreased after heat treatment, and the density of the powders was increased. The composite particles underwent fast liquid sintering process in high energy plasma flame. After plasma treatment, spherical powders with smooth surface were formed. The plasma treated composite particles were composed of a large number of nano-sized grains. The tap density of the spray dried powders was increased after heat treatment, and the tap density of the heat treated powders was further increased after plasma treatment. The flowability of the spray dried powders was decreased after heat treatment, and the flowability of the heat treated powders was significantly improved after plasma treatment. © 2011 Elsevier B.V. Source


Ni S.-Q.,Shandong University | Ni J.-Y.,Shandong University | Hu D.-L.,Tianjin Cement Industry Design and Research Institute Co. | Sung S.,Iowa State University
Bioresource Technology | Year: 2012

The presence of organic matter (OM) is considered to affect anammox process adversely, while practically wastewaters containing ammonia are not free from OM. In this study, the performance of anammox granules in presence of OM was evaluated under different COD to N ratios. Low OM concentration did not affect ammonia and nitrite removal significantly but improved the total nitrogen removal via denitrifiers. High OM could suppress anammox activity, resulting in a lower ammonia removal. PCR tests revealed that there was a reduction in the number of anammox bacteria and denitrifiers quantity increased when 400. mg COD/L influent was applied. A COD to N threshold ratio for anammox inhibition, defined when ammonia removal dropped to 80%, was 3.1, higher than that of flocculent sludge. This study revealed that the coexistence of denitrification and anammox was an effective strategy to treat wastewaters containing high levels of nitrogen and OM. © 2012 Elsevier Ltd. Source

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