Microbial-Influenced Corrosion (MIC) on an 18 in. API 5L X52 Trunkline

Analysis of failed sections from a 31 km long pipeline show that premature failure was caused by microbial-influenced corrosion. This case history summarizes the failure analysis and demonstrates the need for extreme care when using untreated water to hydrotest a pipeline.     

大菱鲆（Scophthalmus maximus L）养殖现状与可持续发展

大菱鲆（Scophthalmus maximus L）的良种优势地位已在我国确立，工厂化养殖的初级模式已经形成并获得普遍推广；规模化养殖和成鱼市场的不断扩大，将我国推进到世界大菱鲆养殖和消费大国行列；“大菱鲆效应”对我国海水工厂化养殖发展和沿海“三农”经济的拉动作用很大，也为我国海水工业化养殖奠定了理论和实践基础；当前由大菱鲆养殖产业的迅速发展而带来的机遇和挑战，正推动着我国海水工厂化养鱼朝良种化、规范化、国产化全封闭式的高级阶段攀登。     

Role of Brassica juncea (L.) Czern. (var. Vaibhav) in the phytoextraction of Ni from soil amended with fly ash: selection of extractant for metal bioavailability

A pot experiment was carried out to study the potential of the plant of Brassica juncea for the phytoextraction of metal from fly ash amended soil and to study correlation between different pool of metals (total, DTPA, CaCl(2) and NH(4)NO(3)) and metal accumulated in the plant in order to assess better extractant for plant available metals. The results of total metal analysis in the soil revealed the presence of Cr, which was found below detection limit (BDL) in the plants. The fly ash (FA) amendments and soil samples were extracted with different extractants and the level of metal vary from one extractant to another. The regression analysis between total and extractable metals showed better regression for all the tested metals except Mn (R(2)=0.001) in DTPA extraction. Correlation coefficient between metal accumulation by the plant tissues and different pool of metals showed better correlation with DTPA in case of Fe, Zn and Ni, whereas, Cu was significantly correlated with NH(4)NO(3) and other metals (Pb, Mn) with CaCl(2). The soil analysis results revealed that the mobility and plant availability of metals (Fe, Mn, Zn, Ni) within the profiles of amended soils was influenced by the change in pH, however, Pb and Cu was not affected. The metal accumulation in total plant tissues was found in the order of Fe>Ni>Zn>Mn>Cu>Pb and its translocation was found more in upper part. The plants grown on soil amended with 25%FA have shown significant increase in plant biomass, shoot and plant height, whereas, no significant effect was observed in root length. The cluster analysis showed 10%FA behave differently on the basis of physico-chemical properties and metal behavior. Thus, it may be concluded that B. juncea can be used for phytoextraction of metals, especially Ni in fly ash amendment soil.     

A Study on the Chemical Compositions of the Jasminum Sambac (L. ) Aiton in Various Farming Seasons During the Blossom Period in Fuzhou Region

<正> The chemical compositions of the head space,essential oil and absolute of jasmin flowers in different farming seasons during the blossom period in Fuzhou were reported in this paper.