Advanced Materials Research Vols. 183-185

Abstract: Different inoculation methods were employed in the process of the Cordyceps militaris subculture. The experimental results indicated that fruit-body yields of strains obtained by mycelium subculture using transfer needle were unstable, and the subcultures obtained by transferring mycelial cakes made by using a punching bear had the relatively high stability. Two kind of subcultures had a significant difference in fruit-body yield using one-way ANOVA analysis (P<0.05).

Abstract: In order to investigate the seasonal characteristic of PM2.5, PM2.5 were collected in four seasons. This study investigates the elemental characteristics of PM2.5. The results show that the distribution trends of Ca, Na, and Mg are consistent and they are the highest in summer, lowest in winter. S is lower in summer and higher in autumn and winter, which is also caused by heating in autumn and winter. Si is higher in winter and lower in autumn, fly ash emissions from coal combustion is the main reason. Zn and K have a significant seasonal variation which is influenced by environmental factors in different seasons. Al and Fe mainly come from industrial emissions and natural emissions, Al is higher in summer and lower in winter, Fe is higher in winter lower in autumn. Cu, Cr, Cd, Ni, Mn, Sr, V, As, and Ba concentrations have lower content in four seasons, which indicates that emissions sources of these elements are more stable.

Abstract: Based on characteristics of environmental impact of railway construction projects, the paper drew on experience of environmental impact assessment (EIA) projects, carried out preliminary EIA on China's mid-long term railway network plan from macro perspective according to planning requirements, and discussed the key points of EIA on guiding special planning.

Abstract: The fermentative nature of five lactic acid bacteria was studied by using saccharified kidney beans. The production of lactic acid of lactobacillus acidophilus (La) was the one with highest yield and quickest production rate. The optimal mixes cultures was Lactobacillus acidophilus (La) ， Lactobacillus plantarum（Lp）and Bifidobacterium bifidum (Bb). The optimum proportion of species was La:Lp:Bb= 2: 1: 1. Soybean milk can promote the growth of the lactic acid bacteria.

Abstract: A knowledge transfer process model among food supply chain members is proposed. The knowledge transfer performance is discussed with the methods of theoretical and quantitative analysis. The results show that the knowledge transfer among food supply chain members can be divided into three levels. An undirected weighted small-world network model can be used to evaluate the knowledge transfer performance among food supply chain members.

Abstract: Contemporary food supply chains are generating externalities with high economic and social costs, notably in public health terms through the rise in diet-related non-communicable disease.A decision making model of multi-product multi-stage food supply-chain consisted of single manufacturer and single supplier is proposed in this article. The model is proved to be superior and efficient through application example. Reasonable decisions are suggested by analyzing the solution of dual problem. The decisions could help members of food supply-chain get more profits.

Abstract: The modification of the pretreated wheat bran by extrusion technology and cellulose enzyme method was studied to improve the content of soluble dietary fiber and enhance product functionality. First ,the pretreated dietary fiber (DF1) was modified by extrusion technology to get DF2,then DF2 were modified by enzymolysis of cellulose enzyme . The results showed as fowllow: the optimum conditions for extrusion modification was 45% material moisture content, 25 r•min^-1 feeding speed, 200 r•min-1screw speed, 70-90-110-130-150°Cextrusion temperature, and the SDF content of DF2 is 33.95%. the optimal enzymatic modification conditions for DF2 was 1:0solid-liquid ratio, 30U/g enzyme adding, 4h enzymatic hydrolysis time.

Abstract: Potato starch residue was used as raw material , a single factor test was used to determine the lactobacillus casei L-lactic fermentation in the amounts of CaCO₃ addition, fermentation temperature, residue saccharification of starch concentration, the optimal dosage range of fermentation time. With 4 factors and 3 levels of 4 orthogonal test of L-lactic acid by fermentation. The order was: the fermentation temperature> saccharification concentration> fermentation period >CaCO₃ dosage. Optimization was as follow : residue saccharification of starch concentration was 80g/L, fermentation temperature was 37°C, CaCO₃ addition level was 60g/L, fermentation time was of 60h. Fermentation conditions for this verification test, L-lactic acid content was 72.3g/L, compared with 15.1% before optimization.

Abstract: The influencing factors of potato starch liquefaction system which use the α-amylase to hydrolysis, the degree of hydrolysis of starch (DE) value as the index by orthogonal experiment, to determine the optimum factor parameters : α-amylase 15u/g , starch content 25%, Liquefied time 55 min, liquefaction temperature 70°C, liquefaction pH 6.5. Under this condition, the DE value is 17% .The results lays a theoretical foundation for the preparation of potato starch saccharification solution.

Abstract: The apoptosis in gastric cancer cells induced by genistein and the relationship between this apoptosis and expression of NF-κB and Caspase-3 were studied. In vitro experiments, MTT assay was used to determine the cell growth inhibitory rate. Transmission fluorescence microscope, transmission electron microscopy, DNA-fragment assay were used to qualitively detect the apoptosis status of gastric cancer line SGC-7901 before and after the genistein treatment. Immunohistochemical staining and Western Blotting were performed to detect the expression of gene NF-κB and Caspase-3. The results showed that genistein inhibited the growth of gastric carcinoma cell line SGC-7901 in a dose-and time-dependent manner. Genistein induced SGC-7901 cells to undergo apoptosis with typically apoptotic characteristics, including morphological changes of chromatin condensation, chromatin crescent formation, nucleus fragmentation and apoptotic body formation. Genistein could reduce the expression of gene NF-κB, and improve the expression of gene Caspase-3.