用生物工程法提高原油采收率的形成与远景

提高原油采收率是最重要的经济问题之一。由于生物工艺的迅速发展，全世界对用生物工艺法采油的兴趣越来越大。本文的目的就是要分析，研究该方法在上述领域里的新成就。     

大青叶正丁醇提取物化学成分的HPLC/ESI-MSn研究

High performance liquid chromatography-electrospray ionization mass spectrometry(HPLC/ESI-MSⁿ) was applied to analyze the chemical constituents from n-BuOH extract of Folium Isatidis. The data of retention time, UV spectra, molar masses and structural information on the compounds were obtained. Seventeen compounds are found in extract from n-BuOH. There are four nucleosides, two purines and eleven flavones.     

关于地理标志产品保护的管理与思考

地理标志产品保护制度,是世界贸易组织针对具有地理标志保护的名优特产品所采取的一项特殊的产品质量监控制度和知识产权保护制度。地理标志保护产品是指产自特定地域,其质量、声誉等特性本质取决于该产地的自然和人文因素,经国家质检总局审批后以地理名称命名的产品。地理标志保护既表明了产品的地域特色和良好质量,又代表了产地的良好信誉,它不仅为经营者带来巨大的商机,还为地方政府发展区域特色经济,优化农业产业化结构开拓一条新思路。     

用油层深部渗透水力压裂的方法有效地开发低渗透储集层

目前，大约30％多的原油的可采储量赋存在渗透率低于0．05μm^2的储集层中，而其中的近80％－在西西伯利亚。     

分光光度法和总有机碳法对超滤膜截留性能测定的比较

分别采用分光光度法和总有机碳(TOC)测定法测定超滤膜对6种标示物(牛血清蛋白,鸡蛋白,α-糜蛋白,PEG20000,PEG10000,PEG6000)的截留率,以比较两种分析方法对膜表征的影响.结果表明:分光光度法和TOC法截留率测定结果较吻合.从数据稳定性来看,两种方法能较一致的测定出超滤膜的切割分子量;但是当截留率较低时,滤出液成分较复杂,两种方法所得结果则存在一定差异.指出分光光度法存在蛋白泡沫、试样液浓度选择、稀释以及PEG显色时间影响问题,并介绍了避免或减轻以上情况的措施.通过比较,发现TOC测定法具有快速、稳定、精确度高、环保等优点.     

Preparation and characterization of the antifouling porous membranes from poly（vinylidene fluoride）-graft-poly（N-vinyl pyrrolidone） powders

Porous membranes were prepared using the phase inversion method from poly(vinylidene fluoride)-graftpoly(N-vinyl pyrrolidone)(PVDF-g-PVP) powders, which were synthesized via γ-ray induced graft polymerization(pre-irradiation). Chemical compositions, thermal behavior, morphology and hydrophilicity of the membranes were characterized by Fourier transform infrared spectroscopy, X-ray photoelectron spectroscopy, element analysis, thermalgravimetric analysis, differential scanning calorimetry, scanning electron microscopy and contact angle measurements, respectively. Permeation experiments were conducted to evaluate the water flux,and the dynamic BSA fouling resistance performances were investigated, too. All the experimental results indicate that the PVDF-g-PVP membranes demonstrate better separation performances over the pristine PVDF membrane.