义185井钻井液技术

义185井是部署在渤海湾盆地济阳坳陷沾化凹陷渤南洼陷渤深5断块高部位上的一口重点评价井,完钻井深4700m.二开裸眼段长达3200m,裂缝发育及地层易剥蚀掉块,井壁失稳严重;三开井底温度高达180℃以上,使用高密度钻井液施工难度极大.通过使用非渗透聚合物钻井液体系和聚胺抗高温钻井液体系,辅助现场钻井液维护处理工艺,满足了钻井施工的要求,全井无复杂情况发生.该井的钻探成功给该区块其他井的施工提供了技术保障.     

环氧改性多元胺对混凝土钢筋缓蚀作用的研究

通过盐水浸渍、半电池电位、混凝土盐水浸烘等方法,对环氧改性多元胺N-206、国外某公司产品S-01及空白试样的缓蚀效果进行测试对比,在相同水灰比条件下研究了N-206对新拌砂浆性能的影响。试验结果表明,环氧改性多元胺N-206对混凝土钢筋具有良好的缓蚀效果,并对砂浆性能无不良影响。     

有机高分子絮凝剂聚胺对硫酸铝的助凝作用

以环氧氯丙烷和二甲胺为主要原料合成聚环氧氯丙烷-二甲胺,利用红外光谱进行了表征分析,并以其作为硫酸铝的助凝剂来处理黄浦江源水,考察了硫酸铝在聚胺的助凝作用下对浊度和有机物的去除效果。结果表明:助凝效果明显,浊度和有机物的去除效果都得到明显提高。     

Long-Term Fluorescent Tissue Marking Using Tissue-Adhesive Porphyrin with Polycations Consisting of Quaternary Ammonium Salt Groups

Localization of tumors during laparoscopic surgery is generally performed by locally injecting India ink into the submucosal layer of the gastrointestinal tract using endoscopy. However, the location of the tumor is obscured because of the black-stained surgical field and the blurring caused by India ink. To solve this problem, in this study, we developed a tissue-adhesive porphyrin with polycations consisting of quaternary ammonium salt groups. To evaluate the ability of tissue-adhesive porphyrin in vivo, low-molecular-weight hematoporphyrin and tissue-adhesive porphyrin were injected into the anterior wall of the exposed stomach in rats. Local injection of low-molecular-weight hematoporphyrin into the anterior wall of the stomach was not visible even after 1 day because of its rapid diffusion. In contrast, the red fluorescence of the tissue-adhesive porphyrin was visible even after 7 days due to the electrostatic interactions between the positively-charged moieties of the polycation in the tissue-adhesive porphyrin and the negatively-charged molecules in the tissue. In addition, intraperitoneal injection of tissue-adhesive porphyrin in rats did not cause adverse effects such as weight loss, hepatic or renal dysfunction, or organ adhesion in the abdominal cavity. These results indicate that tissue-adhesive porphyrin is a promising fluorescent tissue-marking agent.     

DNA Interaction Studies of Selected Polyamine Conjugates

The interaction of polyamine conjugates with DNA double helix has been studied. Binding properties were examined by ethidium bromide (EtBr) displacement and DNA unwinding/topoisomerase I/II (Topo I/II) activity assays, as well as dsDNA thermal stability studies and circular dichroism spectroscopy. Genotoxicity of the compounds was estimated by a comet assay. It has been shown that only compound 2a can interact with dsDNA via an intercalative binding mode as it displaced EtBr from the dsDNA-dye complex, with K_app = 4.26 × 10⁶ M⁻¹; caused an increase in melting temperature; changed the circular dichroism spectrum of dsDNA; converted relaxed plasmid DNA into a supercoiled molecule in the presence of Topo I and reduced the amount of short oligonucleotide fragments in the comet tail. Furthermore, preliminary theoretical study has shown that interaction of the discussed compounds with dsDNA depends on molecule linker length and charge distribution over terminal aromatic chromophores.     

国外聚胺类钻井液用页岩抑制剂开发

从化学结构出发,详细介绍了国外近几年钻井液用聚胺类页岩抑制剂的开发进展。概述了聚胺页岩抑制剂的开发历程、分类、页岩抑制机理、评价方法以及聚胺钻井液应用现状。最后,结合现有的聚胺类页岩抑制剂,展望了未来聚胺类页岩抑制剂的研发趋势。     

Polyamine functionalized glycidyl methacrylate terpolymers as scavengers for metal ions uptake from organic solutions

Resins with amine functionalities were obtained as a result of chemical modification of low crosslinked terpolymers of glycidyl methacrylate with styrene and divinylbenzene or diethylene glycol dimethacrylate. The loading of amine groups, swelling in the selected organic solvents, and thermal properties of the resins were studied. FTIR, DSC, TGA, SEM, and stereomicroscopy methods were also applied for exploring of the resins. The amine functionalized resins were tested as sorbents for uptake of cobalt(II), copper(II), iron(III), and manganese(II) ions from methanol and its mixtures with methylene chloride. The study show that all polyamine functionalized resins uptake quickly Cu(II) ions from methanol solutions. Their ability to remove cobalt(II), iron(III), and manganese(II) ions from solution depended on the mutual compatibility of solvents and resins. It increases clearly when the mixtures of methanol and methylene chloride are applied. © 2011 Wiley Periodicals, Inc. J Appl Polym Sci, 2012     

分蘖期水分胁迫对水稻生长及多胺含量的影响

以旱116为材料,研究分蘖期水分胁迫对水稻生长及多胺含量的影响及与后期产量的关系．结果表明：水分胁迫影响叶绿素含量,株高相对增长速率及分蘖数的相对增长速率,通过回归分析,只有分蘖数的相对增长速率被引入方程;在外源精胺（spm）的处理下,水稻抗旱系数显著增加,叶片中腐胺（Put）、亚精胺（Spd）和精胺（Spm）含量明显上升;在外源鸟嘌呤腙（MGBG）的处理下,水稻抗旱系数明显减小,叶片中Spd及Spin含量明显下降,通过相关分析,叶片中Put、SpdTLSpm含量分别与抗旱系数及分蘖数的相对增长速率呈极显著正相关．叶片中Put、Sod及Stem含量与后期产量密切相美．