Advanced Materials Research Vols. 518-523

Abstract: A novel photocatalyst, AgCl loaded mesoporous graphitic carbon nitride (mpg-C₃N₄) in which silver chloride nanoparticles were introduced into the mesopores carbon nitride, was prepared by a dip-coating procedure. The as-prepared photocatalyst was characterized by X-ray diffraction, transmission electron microscopy, UV-visible spectrophotometry. The novel photocatalyst manifested a better photocatalytic activity than that of pure mpg-C₃N₄ for degradation of methyl orange.

Abstract: The effect of bacterium N1 on the colony formation of the bloom-forming cyanobacterium Microcystis aeruginosa was investigated. The results showed that N1 could induce colony formation in M. aeruginosa in concentration-dependant way. Colony formation can efficiently decrease the damage caused by bacteria through polysaccharides synthesis to maintain the function of photosynthesis apertures.

Abstract: Water hyacinth (WH) has been one the most troublesome caused by invasive species in the warm regions over the world. However, it has the potential to be compressed into biomass pellets as a local source of substitute and renewable solid fuel in the future. The method and preparation of comperssing WH pellets were investigated in this study using a compressing apparatus in the lab. WH samples were ground by a hammer mill with three different screen sizes (2.0, 3.0and 4.0mm), compressed with five levels of compressing forces (1000, 2000, 3000, 4000 and 5000N) at three levels of moisture content (10%, 15% and 20% wb). The density of each sample pellets was calculated and recorded. The effects of compressing pressure, screen size and moisture content on pellets density were analyzed depending on the statistical analysis of variance (ANOVA). It was found in this study that all the three factors except screen size affected WH pellets density significantly, high quality of WH pellets in terms of high pellets density can be obtained under a compressing pressure about 80MPa and at a moisture contnet about 15% (wb).

Abstract: In order to increase the efficiency of composting vinegar residue, the effect of different strain combination,a thermophiles(OP-2) and two rhizopus(FM1,SL10) combined,on the composting pocess and effect was studied. The results showed: Inoculating thermophilic bacteria OP-2 can increase the speed of composting vinegar residue, which can increase the heap temperature to 70°C in 7days ahead. Also inoculating inocula accelerated the mineralization of organic nitrogen. In the end of composting, the contents of total nitrogen、total phosphorus and total potassium, as well as GI were higher than the control treatment, which showed that inoculating inocula can accelerate the maturity process of composting vinegar residue and increase the composting quality.

Abstract: Phosphofructokinase (PFK), which catalyses the phosphorylation of fructose-6-phosphate to fructose-1,6- bisphosphate, a key regulatory step in the glycolytic pathway. The former studies indicated the PFK could enhance glycolysis. The full-length cDNA encoding PFK was obtained from oleaginous microalgae Dunaliella parva, which include 1572 bp open reading frame (ORF), 254 bp 5′-untranslated sequence and 323 bp 3′-untranslated sequence. Dunaliella parva PFK showed the highest sequence similarity with the PFK from Chlamydomonas reinhardtii and Volvox carteri. The Dunaliella parva PFK also showed wide similarity with other species.

Abstract: The Ni(x)Co(10)/MOR (x = 0.01, 0.15, 0.30) catalysts were prepared by the impregnating method. The catalysts were characterized by XRD, NH₃-TPD and NO-TPD. The catalytic activity was evaluated with fixed-bed reactor. The results shown that cobalt species was present in the surface of MOR zeolite in the form of Co3O4, and the catalytic activity, acidity and adsorption of NO were affected by Ni/Co molar ratio. The Ni(0.01)Co(10)/MOR catalyst had better activity, the conversion of NO was 56.9% at 340 °C.

Abstract: Field experiment was conducted in the saline soil of Yellow River Delta between May to Oct. Sweet sorghum was planted with different cultivation measures to test the effect of plastic mulch, plant density, organic manure application and additional fertilizer application on the yield, stalk juice Brix and extraction rate. The soil bacteria and actinomycetes quantities were also determined after harvesting to test the amelioration effects of different measures on soil.

Abstract: Room-temp. Cellulase CS was used to enzymatic washing on denim garments at 20°Cand 35°C, and Novoprime 838 from Novozymes was employed at 55°C in case to evaluate their performance. Through analysis of activities of enzymes, it is indicated that CS has a relatively broad and steady action temperature range between 20～35°C. Similar mechanical and physical properties of washed garments were achieved by using CS under room temperature conditions and using Novoprime 838 at 55°C. No heating needed during enzymatic washing by using CS.

Abstract: To investigate the microorganisms growth process and biostability of biological activated carbon by manual preparation, the microorganisms growth process were observed by the photos of optics and electronic microscope, and the microbial biomass was determined by phospholipids (Lipid-P) analysis. The bell bug, rotifer and eelworm were observed by the photos of optics and electronic microscope. The zoogloea size of the foster biological active carbon was big, the configuration was tight. The quantity of zoogloea on the top of BAC column was more than that on the below. The Lipid-P biomass of BAC on the top and below were 16nmolP/cm3 and 6.2nmolP/cm3 respectively, as same as that was the number of E. Coli cells were 1.6×109cfu/cm3 and 6.2×108cfu/cm3 respectively in 60-days. The Lipid-P biomass decreased to 90 days. The biological activated carbon was obtained by manual culture.

Abstract: The secondary salinized greenhouse soil was provided with subsurface pipe drainage system with drainage spacing 6 m and drain depth 0.4m to study the movement of salt and water. The field investigations indicated that the resalination rates of the surface soil with subsurface drainage system were lower than those with non-drained system (CK) in an irrigation circle of the crop. The resalination rate of the surface soil right above the drainage tubes (T1) was significantly lower than that between the two drainage tubes (T2). At the 5th day after irrigation, the soil volumetric moisture contents of different treatments were significantly decreased and the resalination of surface soil were obvious. The results showed a considerable increase of resalination rate after irrigation that was varied at the 5th day as following sequence: CK(10.6%) > T2(8%) > T1(7%).