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The effect of nitrate on phosphorus release was investigated with 3 groups brown anaerobic reactors by the additions of nitrate. The investigated object comes from a sewage treatment plant in which the A/O process ( a enhanced biological phosphorus removal process) was used. A series of indicators of sludge were measured every certain time during experimental period. The results indicated that: The...
To observe effects of trigonella foenum greacum. L Saponin (TFGs) on the proliferation of the interstitial fibroblast of rats' myocardium (CFs), and the expression of U II-induced TGF-β1 and CTGF mRNA. The interstitial fibroblasts of rats' myocardium were cultivated in vitro and identified,and were treated with TFGs whose concentrations is 0,25,50,100 and 200 mg.L−1 separately. The untreated cells...
The quality of indoor air directly affect human health and safety. Keeping in mind the characteristics of Indoor environment system, selecting a series of indicators, and using multiple indicators of extension evaluation method, building up the element model about indoor air environment. Finally an example is given to validate the method of comprehensive evaluation, the results show that: the method...
Cadmium, which possesses the character of lipid solubility, bioaccumulation and toxicity, is considered as the most hazardous heavy metal with abroad applications. Microorganism growing in cadmium-rich environment for a long time forms tolerance and resistance to cadmium.Adsorption and accumulation to heavy metal by cadmium tolerant bacteria are one of available measures to treat cadmium contamination...
Objective To study the functional change of peripheral nerve after repaired in different size by small gap briding (the proximal end is smaller than the distal in size), compared with epineurium suture in the same size. To explore the effect of functional reserve of peripheral nerves and the best situation for the reserve of nerve functional. Methods 10 Wistar rats served as the donors of arteris...
The waterborne polyurethane composite (WPU/SAN) was prepared by seeded emulsion polymerization. The waterborne polyurethane (WPU) was previously synthesized from isophorone diisocyanate (IPDI), polypropylene glycol (PPG), dimethylolpropionic acid (DMPA) and 1,4-butanediol (BDO) by a two-step process. Styrene (S) and acrylonitrile (AN) were subsequently added to the seed emulsion comprising the WPU...
Oasification and desertification are the most fundamental geographical processes that occur in arid regions, and the main goal of arid region development is to make oasis ecosystems evolve more stably and systematically and thus achieve their sustained development. As a complex system of dissipative structures, oasis systems evolve under forces of self- and other-organizational processes. At different...
RE is concerned by the countries of the world because of its extensive application value, however, China hasn't the right of pricing as the main RE production country. The status of the low RE export prices, the low product economic value added and not yet established the strategic reserves threat to the sustainable development of China's rare earth resources and utilization. Therefore, rare earth...
After the surface treatment with concentrate sulfuric acid, the sheet resistance of ITO layer is unchanged, while the surface roughness increased. When the 70–100nm ITO layer is eroded by the concentrate sulfuric acid for 480 seconds, its reflectivity decreased and the transmittance significantly increased. It can improve the optical properties of the LED devices.
Aimed at the design of shielding cover in defense works, the advances in shielding cover research were summarized and analyzed. The available researches can be concluded to the following three types: enhance the compressive strength, tensile strength, hardness and toughness of the materials in shielding cover, improve the structure of shielding cover, set the irregular-shape yaw-inducing layers on...
The internet of things (IOT) has brought a broader space to the intensive development of modern agriculture in the application of agricultural environmental monitoring. To solve the problems of real-time video acquisition, image acquisition and motion capture in the agricultural environment, this paper use the ARM S3C44B0X as the processor and put forward a new kind of real-time video acquisition...
It was the first time that the Influences of main factors, such as pH of solution, the value of C/N, the different kinds of carbon sources and temperature on removing NO3− in polluted groundwater from in-situ leaching uranium mine by denitrifying bacteria (DNB), have been studied domestically. The tests results showed that the optimum pH was between 6 to 8. When pH≦5, the removing rate of NO3− decreased...
An autonomous X-ray pulsars navigation algorithm based on the extended Kalman filter (EKF) is proposed for spacecraft in order to realize 100m position accuracy. The measurement equation of spacecraft position is described with the TOA difference between spacecraft and the solar system barycenter. Then, the EKF, which incorporates spacecraft dynamics and TOA measurements, is developed to estimate...
Decision making method for freight flow distribution of logistics network, whose line lengths are measured by single factor or by multifactor with constant weight, cannot take the influence of factors' state values over their weights and the preferences of decision maker into account. Aimed to solve the problem, factors' interactions are analyzed and accordingly the logistics network is separated...
The reason of deviation between theoretical critical damp resistance and experimental one is analyzed. The critical damp current is expanded Fourier integral of continuous frequency spectrum by Fourier transform, the Fourier integral of critical damping current are separated the Fourier polynomial of finite harmonics of discrete frequency by sampling. The loss resistance of inductor and capacitor...
Polyaniline nanopaticles for supercapacitor were prepared by using polystyrene microsphere as carrier. They were characterized by FTIR, SEM and TGA for structure and electrochemical station for supercapacitive performance. The results show that, the polystyrene-polyaniline composite, about 4∼5 µm, keep the microsphere structure of polystyrene, and was covered on its surface with polyaniline nanoparticle...
The synthesis of heteropoly compounds and preparation of the heteropoly acid zinc salt as photocatalyst, and their characterizations are studied by IR, SEM and BET. The result showed that the prepared compounds have Keggin structure, and remain the structure after salted, the HPA for degrading dye wastewater analog, photocatalytic decolorization rate methyl orange solution is investigated, The photocatalytic...
Based on the background of global warming and urbanlization, the city hotland has become one element of controling the city climate and enviroment, so how to quantitatively analyze the structure of urban thermal environment and its change feature become the most question for people. Author use the landsetTM as the datasource, analyse the Han Dan city's city hotland and NDVI, the result indicate that:...
A two dimensional Zinc Oxide nanorod medium model with disorder location and disorder size is set up, and the spectrum and the light field distribution are investigated by means of finite difference time domain method and perfect match layer boundary condition. Four resonant peaks are found in the spectrum; the localization phenomenon is found in the light field distribution at the resonant peak wavelength...
As a method to analyze the soil moisture, the NDVI-Ts space has aroused much attention. The paper uses the method of TVDI which calculated from the NDVI-Ts space to monitor the soil moisture status of Shendong mining area which is located in arid and semiarid area in Northwest China from 6 September to 8 November. The soil moisture status come from TVDI was consistent to the physiognomy types distribution...
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