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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...
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...
The AlSn20 coatings on bearing alloy were deposited using magnetron sputtering technology. The influence of tin target current on the microstructure, hardness, corrosion resistance, bonding force and friction coefficient were analyzed. The results show that when the tin target current are in the scope of 0.19A ∼0.25A, with the decreasing of it, the coating changes from rough structure to fine structure...
In this paper, Cu-Ce/TiO2 nano-particles were synthesized by sol-gel method with copper nitrate Cu(NO3)2·3H2O, cerium nitrate Ce(NO3)3·6H2O, and Ti(C4H9O)4. Their photocatalytic activities were evaluated by degrading formaldehyde gas under visible light irradiation. The photocatalytic activity of Cu-Ce/TiO2 nano-particles, in the visible light, is influenced by Cu-Ce-doped loading (A factor), Cu-Ce...
Foodborne pathogens such as Salmonella can cause gastrointestinal illness if they are ingested with uncooked foods such as salad. Foods such as salad pose a greater risk because they are consumed raw and have been the source of major outbreaks of disease from fresh produce. SipA, one of Salmonella's effectors, is an actin-binding protein that is required for its efficient entry into host cells. We...
Using Alfalfa silage as research materials, the research discusses the prediction of Near Infrared Spectroscopy (NIRS) on chemical compounds 121 samples of alfalfa silage. The results are as follows: the NIRS models of DM, CP, WSC have been set up. The RPD value for cross validation and validation are all above 2.5. The results show that the NIRS can accurately evaluate nutritive value of alfalfa...
A durene-degrading strain (J4) was isolated. The paper researched the decomposition of durene through J4. The strain can grow in the medium containing durene and experiences a longer stationary phase of growth than with out durene. The analysis of durene in different time showed J4 can decompose durene, which can let the bacterium used in the disposition of organic waste water containing durene. Based...
The depending on the analysis of main factors affecting waste military air material recycling center site selection, a preference site select ion method based on rough sets theory is presented in this paper. Considering that site select ion is a multi-attribute decision with preference information, under the use of rough sets, the original decision table is replaced by the binary comparison table,...
The separation/enrichment of tilmicosin was studied based on the system of aqueous two phase-gas solvent subblation, the method of HPLC was established to determin tilmicosin enriched. The optimal condition of the solvent sublation was obtained: the sublation solvent was n-propanol, the salting-out agent was (NH4)2SO4 with 36% (g/100ml), the pH was 3, N2 flow rate was 20 ml/min, the sublation time...
Stable dispersion of multi-walled carbon nanotubes (MWNTs) has been prepared by using chitosan (CS) as dispersant, and it was quantitatively characterized by UV-Vis-NIR Spectrophotometer. When the sediment time reaches 375 hours, the supernatant concentration of MWNTs declines 18 % for the bare MWNTs suspension, compared with 6.5 % for the MWNTs dispersed by CS. Morphologies of MWNTs were observed...
Soil enzymes play a key role in the material cycle and energy flow in soil ecosystem. Typical soils andrhizosphere of vegetation are selected as samples to determine the activity of enzymes, including catalase, iurease, vrease and phosphatase, which are gathered from Haizhou, Kangping county of Liaoning province. The results showed that the activity of soil enzymes in fixed sand dune is highest, and...
From 4 week to 6 week, 320 Hailan layers were assigned at random to groups of 5 individuals and distributed among 64 pens. They were kept in pens with four different light intensity (5lux, 10lux, 15lux, 20lux). we observe the feather pecking, feeding groveling, preening, foraging, drinking, standing and walking. We find that light intensity had significant effects on rate of feather pecking. With...
Objective To establish a rapid identification method for electrolyte material adulteration in raw milk, and was used for inspect raw milk. Methods Through the chromogenic reaction with specific chemical reagents, the adulterated electrolyte materials such as salt, nitrite, nitrate, sulfate, sodium thiocyanate, alkali were identified qualitatively. Results The method of inspection electrolyte material...
The low propagation coefficient was a main obstacle in tree peony regeneration for a long time. Here, we present a new plantlet regenernation system to significantly improve the propagation coefficien in tree peony regeneration by lateral buds exsectting and engraving. The procedure are briefly as follows: (1)The medium for proliferation was WPM + 6-BA3.0mg/L + IAA 0.2mg/L, with the proliferation...
An endophytic fungus having antitumor activity was isolated from Viscum Coloratum of Chinese. On the basis of its morphological and 18S rDNA sequence, the fungus was identified as Lasiodiplodia theobromae and designated as A33. The broth of A33 showed effectively antitumor acitivity. In addition, TNF mRNA exoression was upregulated after treatment with A33 for 6h compared to the untreated group. Isolation...
The Cosmos software was used to build the static load finite element model of bus aluminum HS6061-T6 rims for simulating the rotary fatigue test in this paper. In the finite elements analysis, the elements forming the meshes were hexahedral linear elements with eight nodes. The equivalent stress amplitude was calculated based on the nominal stress method by considering the effects of mean load, size,...
A modified polyacrylamide gel method was used to fabricate Bi2Fe4O9 nanoparticles. Thermogravimetric (TG) analysis, differential scanning calorimetry (DSC) analysis, fourier transform infrared (FTIR) spectroscopy, and X-ray diffraction (XRD) were used in combination to investigate the thermal decomposition process of xerogels and the formation of Bi2Fe4O9 phase. It is demonstrated that high-phase-purity...
The experiment was done at Qingdao agricultural university from 2008 to 2009. The varieties were Handao502 and Shengdao13. The effect of different concentration Stevioside glycosides blending liquid (SBL) on the yield and quality were studied. The best concentration and method of SBL were discussed. The result of the experiment showed: the appropriate spraying concentrations of SBL on upland and irrigated...
There are more than 55 kilometers subgrade in NGZQ-5 section of Nanning-Guangzhou high-speed railway passenger dedicated line. A large number of filling material along the construction section is high expansive clay soil, and it must be improved by physical or chemical methods. The liquid and plastic limits, expansibility, mechanical strength and water stability of expansive soil is studied. The results...
The efficiency of different solid phase extraction (SPE) sorbents was studied for sample clean-up in the determination of bispyribac-sodium residues in rice grains. Three different SPE sorbents OASIS MAX, ProElut PXA and Supelclean ENVI-18 were used and compared. The clean-up performance was evaluated using high performance liquid chromatography with photodiode array detector. Oasis MAX sorbents was...
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