阳离子荧光探针——咪唑鎓盐的大环四胺金属配合物的荧光性质研究

报道了一种含有大环四胺的咪唑鎓盐配体在吡啶/水为溶剂的条件下对Cu(II), Zn(II), Co(II)三种离子不同的荧光响应;在同种浓度下Cu2 配合物存在明显的荧光增强,Co2 、 Zn2 配合物存在较强的荧光翠灭,而Zn2 比Co2 荧光响应减弱得更多.     

Synthesis of new flow improvers from canola oil and application to waxy crude oil

Several techniques are employed to mitigate the problems associated with the crystallization of paraffin during the production and/or transportation of waxy crude oil. One of these techniques is the addition of chemicals that depress the pour point of the oil and inhibit the formation of paraffin crystals. In this work, the chemicals, polyamine amide (PAA), are prepared by aminolysis and polycondensation from canola oil and polyamine as substrates. Nitrogen atoms are fixed in the main chain of the polymers to modify the polarity. The effectiveness of the PAAs on four crude oil was tested as pour point depressants as well as paraffin inhibiters. The highest pour point reduction depression was achieved as 12.6°C. Differential scanning calorimetry and paraffin crystal morphology studies were conducted on simulated crude oil to elucidate the mechanism of pour point reduction.     

聚氧化丙烯多胺的合成、表征及对环氧树脂的增韧效应

合成了一系列新型的聚氧化丙烯多胺（ＰＰＡ）,并对其结构进行了表征,同时研究ＰＰＡ添加到双酚Ａ环氧树脂（ＤＧＥＢＡ）－二乙烯三胺体系中对环氧树脂固化过程的影响以及对固化环氧树脂的增韧效果。实验结果表明,随着ＰＰＡ的加入,材料的冲击强度有较大的提高,当含有１０ｐｈｒ ＰＰＡ２０４（聚醚分子量为４００时）,环氧树脂网络的冲击强度比纯环氧网络增大了２．６倍。文中同时对含有ＰＰＡ的环氧树脂的固化反应进行了初     

Design, synthesis, and pharmacological characterization of polyamine toxin derivatives: potent ligands for the pore-forming region of AMPA receptors

Polyamine toxins, such as philanthotoxins, are low-molecular-weight compounds isolated from spiders and wasps, which modulate ligand-gated ion channels in the nervous system. Philanthotoxins bind to the pore-forming region of AMPA receptors, a subtype of glutamate receptors which are important for memory formation and are involved in neurodegenerative diseases. Previous studies have demonstrated that modification of the polyamine moiety of philanthotoxins can lead to very potent and highly selective ligands for the AMPA receptor, as exemplified with philanthotoxin-56. Much less attention has been paid to the importance of the aromatic head group of philanthotoxins, but herein we demonstrate that modification of this moiety leads to a significant improvement in potency relative to philanthotoxin-56 at cloned AMPA receptors. Interestingly, the incorporation of an adamantane moiety is particularly favorable, and the most potent compound has a Ki value of 2 nM, making it the most potent uncompetitive antagonist of AMPA receptors described to date. Such compounds are potentially useful as neuroprotective agents.     

聚胺的合成及对柴油抗静电性能的影响

以不同结构的伯胺和环氧氯丙烷为原料合成聚胺,采用高氯酸非水滴定法测定产品的总胺值和叔胺值,使用蒸汽压渗透法（VPO）测定产品的相对分子质量,并用红外光谱对其产品结构进行表征,最后将聚胺与癸烯聚砜进行复配,添加到0号商品柴油中,对其抗静电性能进行评价。结果表明,不同结构的聚胺与癸烯聚砜复配都能明显提高0号商品柴油的电导率,其中以链状脂肪伯胺合成的聚胺的抗静电效果远比环己胺聚胺和苯胺聚胺的效果好。当正丁胺聚胺与癸烯聚砜加剂量均为2 mg/L时,0号柴油的初始电导率从3 pS/m增加到487 pS/m;储存9天时,柴油电导率超过2 000 pS/m,且能稳定储存25天以上。加剂量对柴油电导率影响较大,十二胺聚胺与癸烯聚砜复配,加剂量均为0.5mg/L即能满足使用要求,而正丁胺聚胺和癸烯聚砜加剂量均为0.8mg/L以上才能满足要求。     

淀粉/聚胺复合物纸张增强机理初探

研究了淀粉/聚胺复合物、阳离子淀粉及原淀粉在纸浆上的吸附类型,测定了淀粉/聚胺混合糊液及单一组分的黏度,探讨了淀粉/聚胺复合物在不同浆种纸张中的作用效果。结果表明,淀粉与聚胺形成了复合物,该复合物对再生浆的作用效果与阳离子淀粉相当,具有明显的增强作用。淀粉/聚胺复合物用量为1.5%时,可使纸板的裂断长增加22.6%,纤维留着增加率提高了6.8%。淀粉/聚胺复合物在纸浆纤维上的吸附为化学吸附和物理吸附共同作用的结果,与阳离子淀粉的吸附相似。     

The Development and Application of a Novel Polyamine Water-based Drilling Fluid

Polyamine water-based drilling fluid has been used around the world in recent years. The authors investigated the key additive SDJA-1 as polyamine shale hydration inhibitor. Results indicate that SDJA-1 can suppress clay hydration effectively and provide a pH buffer effect. Polyacrylamide and nano-emulsion ZX-8 were selected as shale encapsulator and lubricant, respectively. The properties of polyamine water-based drilling fluid including inhibition, lubrication and toxicity were evaluated compared with other inhibitive water-based drilling fluids and conventional oil-based drilling fluid. Results show the fluid outperforms other water-based drilling fluids and approaches to the performance of oil-based drilling fluid. Furthermore, the system is non-toxic and environmental friendly, superior to oil-based drilling fluid. This system was successfully applied on well Tian 310 in Shengli oilfield. A caliper log was run which indicated the highest quality wellbore ever recorded in the entire block.     

聚胺仿油基钻井液研究与应用

聚胺仿油基钻井液是一类以聚胺抑制剂和MEG(甲基葡萄糖甙)为主要处理剂的新型钻井液体系,在川西中浅层水平井中得到广泛应用。室内实验表明,该钻井液流变性、抑制性和润滑性较好;现场应用表明,该钻井液性能稳定,抑制性强,润滑性好,水平段井径扩大率较小,起下钻摩阻较低,能够满足川西中浅层水平井的钻井需要。     

聚胺与鲑鱼精DNA相互作用中的盐效应

通过浊度、紫外吸收和Zeta电位测定,研究了盐对聚胺与鲑鱼精DNA相互作用的影响。结果表明,加入盐产生屏蔽效应,使体系Zeta电位下降,当c(NaC l)=5 mmol/L时,SPM-DNA体系Zeta电位由0 mV降至-4mV,SPD-DNA体系电位由-2.5 mV降至-4 mV。浊度和紫外吸收结果证明了盐屏蔽效应的存在,并随盐浓度的升高,屏蔽效应增大,且Ca2+、Mg2+的屏蔽作用大于K+、Na+。pH的升高使聚胺-DNA的相互作用减弱。