Advanced Materials Research Vol. 893

Abstract: PR-1 (pathogenesis-related proteins) family has been described one of the most important families among the 17 PR groups in many plant species in defense with oomycetes, fungi, bacteria, orviruses, used as a marker of the capacity of defense in PRs. Though some independent studies have demonstrated that antifungal activity is clearly associated with purified, over-expressed PR-1 protein or PR-1 proteins-containing transgenic plants, the biological functions of PR-1 proteins remains basically blur. The PR-1proteins are encoded by multi-gene families in plants based on the presence of 22 and 32 PR-1 genes in the finished Arabidopsis and rice genomes, respectively. The PR-1 proteins were found secreted either on resisting pathogens, or upon defense signaling, later the PR-1 proteins were also demonstrated in various developmental healthy plants tissues, like tobacco floral tissues and leaves, suggesting that these proteins serve essential functions in plant life, whether in defense or not.

Abstract: This paper presents the results on dielectric properties of pulverized material based on agricultural waste namely oil palm frond and pineapple leaf fiber for microwave absorber application in the X-band frequency range. The investigation is started by identifying the pulverized materials permittivities and loss tangents using coaxial probe technique, followed by density measurement comprising the determination of bulk and solid densities. Then, by using dielectric mixture model, the solid particle dielectric properties were determined. It is observed that the air properties give quite an effect on the permittivity and loss tangent of the pulverized materials. It is also found that the lower the material density the higher material dielectric constant will be. Furthermore, the results show that, both oil palm frond and pineapple leaf fiber are potential to be X-band absorber with average dielectric constant of 4.40 and 3.38 respectively. The loss tangents for both materials were observed to be more than 0.1 which mark them as lossy materials.

Abstract: Salmonella in the normal state were injected into the sterile bottled drinking water with the concentration of 107CFU/ml finally. Then these samples were respectively treated by 4°C, -20°C, copper, the two latter samples were found that their numbers of bacteria colonies reduced to zero on the solid culture medium and the absorbance had no change in the liquid culture medium, they had no reproduction and can not be cultured, which had been thought that the cells were all dead. The ways of alteration in temperature, adding of tween20 and catalase may help awake up their culturability in the experiment. The samples had entered the so-called viable but nonculturable state (VBNC).

Abstract: This paper studied the biological effect in vitro of exo-polysaccharides from Grifola frondosa (GFP) on liver injury induced by CCL4, Three different molecular weight of GFP were obtained by ultrafiltration, that were GFP-1 GFP-2 and GFP-3. The result of liver injury induced by CCL4 through detecting the cell survival rate and AST, ALT activity indicated that GFP-2 had much better protective in vitro with acute hepatic injury induced by CCL4.

Abstract: To date, membrane technology is of great concern while conventional processes are not able to fulfill prosperous separation. The presence of EDCs in the environment indicates that conventional treatment plants (CTPs) may have limited capability to remove these compounds. Membrane process such as membrane bioreactors (MBRs), nanofiltration (NF) and reverse osmosis (RO) can produce high quality effluents suitable for reuse applications. Membrane bioreactor (MBR) technology is a promising method for water and wastewater treatment because of its ability to produce high-quality effluent that meets water quality regulations. This paper aimed to provide a review of recent research on feasibility of membrane technology such as MBR, NF and RO and also their application to remove EDCs and PhACs from aqueous solution which are highly harmful and toxic. The major factors which exert influence on the separation of these organic micropollutants have been also studied.

Abstract: The use of sugarcane bagasse for providing avaibility of raw material have been attracting attention. The benefits using natural fiber such as sugarcane bagasse are eco-friendly, low cost considerations because widespread avaibility, high stiffness, better thermal stability, and biodegradability. Sugarcane bagasse and (Polyvinyl acetate, PVAc) have been shown to possess the ability of being applied as raw material for manufacturing of bio composite panel at 10mm thickness (fixed variable) by three mesh sizes (20,30 dan 40) with ratio of the composition 95:5, 90:10 and 85:15%. The specimen have been emphasized at 3:2 and 2:1. This research was conducted to investigate possibility of manufacturing bio composite panel that its characteristic resistance to the thermal conductivity. This bio composite speciments were tested for thermal conductivity test according to ASTM E-1225. The results revealed that optimum design for bio composite panel obtained that emphasis at 3:2, filtered by mesh size 20, ratio composition sugarcane bagasse 85% and PVAc 15%. The test result shown that panel has thermal conductivity resistance value (R) 17,089 °C/W. Thus, it can be concluded that bio composite panel can be manufactured successfully from sugarcane bagasse and PVAc as the matrix mixture.

Abstract: The porous titanium alloy containing 17.5 wt% molybdenum elements prepared by gel-casting methods was used as precursor. The composite coatings with hydroxyapatite and TiO₂ prepared on the precursor was treated respectively by NaOH solution, 30% H₂O₂+NH₃ solution, HF+HNO₃ and PdCl₂ solution to improve the characterization of coatings. The microstructure was examined by SEM, and part of the coatings was examined by EDS to indicate the linear distribution of HA and TiO₂. The corrosion behavior of the coatings in the simulated body fluids (SBF) was evaluated by potentiodynamic polarization test and impedance plots. The results showed that the corrosion resistance of the coatings treated with PdCl₂ solution was better than the others. The passivation layer which played a key role in corrosion resistance was generated by PdCl₂ solution treatment; their surface morphologies was more uniform than the others and had no crack; the thickness of the coatings was 60~70μm.

Abstract: Based on the study of rhodanine derivative WL-276,some novel compounds were synthesized,and their anti-tumor effects were screened by MTT method. Hydantoin is rhodanine of electronic derivative. Compounds of 3a-3d were obtained by Aldol reaction, whose structures were confirmed by 1H-NMR. Furthermore, preliminary pharmacological results suggested that compounds 2a had strong inhibitory effects on the proliferation of HepG2 tumor cells.

Abstract: Mn-doped Cu₃N films were prepared by radio frequency reactive magnetron sputtering method under different manganese concentration. The deposits exhibit a satisfactory crystallinity and a preferred growth orientation along the (111) plane. The shapes of crystalline grains vary from pyramid-like to rugby-ball-like with the Mn-doping constituent in Cu₃N film reaching 0.02%. The electrical resistivity of Mn-doped Cu₃N films has dramatically increased from 0.102×10³ Ω·cm to 0.495×10³ Ω·cm at room temperature. Moreover, the reflectivity difference and ferromagnetic property have also been investigated.

Abstract: In order to fabricate the SiO₂ thin film using dimethyl silicone oil and ozone on protective covering glass for solar panels, the hydrophilicity and the transmittance of the film was investigated. We fabricated the film at different temperatures of 150°C, 175°C, 200°C, 225°C and 250°C on the glass substrates. The hydrophilicity of the film fabricated at 150°C showed very good hydrophilicity (water contact angle: ~8°), and transmittance was improved compared to the non-coated glass.